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KHAELOR — a terminal-native autonomous engineering agent powered by Anthropic.

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feat: initial commit — KHAELOR terminal-native autonomous engineering agent

Simon-Pierre Boucher committed yesterday (Aug 10, 2026)

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1 +# KHAELOR
2 +# File: .gitignore
3 +# Description: Git ignore rules — secrets, dependencies, build artifacts, reference repos.
4 +#
5 +# Author: Simon-Pierre Boucher
6 +# Contact: contact@spboucher.ai
7 +
8 +# Secrets — never commit
9 +.env
10 +.env.*
11 +*.key
12 +
13 +# Reference implementations (cloned third-party repos, not part of KHAELOR)
14 +references/
15 +
16 +# Dependencies
17 +node_modules/
18 +
19 +# Build output
20 +dist/
21 +build/
22 +*.tsbuildinfo
23 +
24 +# Logs
25 +logs/
26 +*.log
27 +
28 +# OS
29 +.DS_Store
30 +
31 +# Local tooling state
32 +.khaelor/cache/
33 +coverage/
34 +
35 +# npm pack artifacts (published as release assets)
36 +*.tgz
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1 +# KHAELOR — CLAUDE.md
2 +
3 +> **Project:** KHAELOR
4 +> **Command:** `khaelor`
5 +> **Identity:** A terminal-native autonomous engineering agent powered by Anthropic.
6 +> **Internal principle:** Understand first. Design second. Implement third.
7 +> **Author / Maintainer:** Simon-Pierre Boucher — contact@spboucher.ai
8 +
9 +---
10 +
11 +## 1. MISSION
12 +
13 +You are building **KHAELOR**, a next-generation autonomous terminal agent.
14 +
15 +KHAELOR is **not** another Claude Code clone. It must combine the strongest architectural and UX ideas found in:
16 +
17 +- Claude Code
18 +- Hermes Agent
19 +- OpenCode
20 +- OpenHands / OpenHands Software Agent SDK
21 +- mini-SWE-agent (where its minimalism is useful)
22 +
23 +…while developing its **own architecture and identity**.
24 +
25 +**Long-term goal:** build the best terminal-native AI agent interface in existence.
26 +
27 +KHAELOR V1 is **Anthropic-only**. Do NOT implement OpenAI, Gemini, OpenRouter, Ollama, or local models in the first version. The architecture must nevertheless remain clean enough that additional providers could later be added without rewriting the agent kernel.
28 +
29 +The first release must focus obsessively on:
30 +
31 +1. Exceptional terminal UX
32 +2. Excellent Anthropic integration
33 +3. Reliable agent execution
34 +4. Clean architecture
35 +5. Context efficiency
36 +6. Observable actions
37 +7. Fast interaction
38 +8. Safe and understandable permissions
39 +9. Persistent sessions
40 +10. Strong repository intelligence
41 +
42 +---
43 +
44 +## 2. ABSOLUTE RULES (NON-NEGOTIABLE)
45 +
46 +These rules override everything else in this document. Violating any of them means the work is **not done**, regardless of whether it compiles, passes tests, or looks finished.
47 +
48 +### ABSOLUTE RULE #0 — MANDATORY FILE HEADERS
49 +
50 +**Every source code file created or substantially rewritten in this project MUST begin with an author header.**
51 +
52 +Required fields:
53 +
54 +- **Author:** Simon-Pierre Boucher
55 +- **Contact:** contact@spboucher.ai
56 +- **File:** relative path from repository root
57 +- **Description:** one line describing the file's purpose
58 +
59 +#### TypeScript / JavaScript (`.ts`, `.tsx`, `.js`, `.mjs`, `.cjs`)
60 +
61 +```ts
62 +/**
63 + * KHAELOR
64 + * File: src/agent/kernel.ts
65 + * Description: Minimal agent kernel — coordinates context, model, and tool execution.
66 + *
67 + * Author: Simon-Pierre Boucher
68 + * Contact: contact@spboucher.ai
69 + */
70 +```
71 +
72 +#### Shell scripts (`.sh`)
73 +
74 +```bash
75 +#!/usr/bin/env bash
76 +# KHAELOR
77 +# File: scripts/build.sh
78 +# Description: Production build script.
79 +#
80 +# Author: Simon-Pierre Boucher
81 +# Contact: contact@spboucher.ai
82 +```
83 +
84 +#### Rust (`.rs`) — if/when a native component exists
85 +
86 +```rust
87 +//! KHAELOR
88 +//! File: native/src/lib.rs
89 +//! Description: Performance-critical native component.
90 +//!
91 +//! Author: Simon-Pierre Boucher
92 +//! Contact: contact@spboucher.ai
93 +```
94 +
95 +#### Markdown documentation (`.md`) — when authored as a deliverable
96 +
97 +```md
98 +<!--
99 +KHAELOR
100 +File: docs/ARCHITECTURE.md
101 +Author: Simon-Pierre Boucher
102 +Contact: contact@spboucher.ai
103 +-->
104 +```
105 +
106 +#### Exceptions
107 +
108 +- Pure data files that cannot carry comments (`.json`, lockfiles, binary assets) are exempt. Where a config format supports comments (`.jsonc`, `.yaml`, `.toml`), the header IS required.
109 +- Generated files must carry the header in their generator template, plus a `Generated file — do not edit` line.
110 +- Vendored/reference code under `references/` keeps its original authorship and licenses. **Never** apply this header to third-party code.
111 +
112 +#### Enforcement
113 +
114 +- Add a lint/CI check (`scripts/check-headers` or an ESLint rule) that fails the build if any first-party source file is missing the header.
115 +- The header check is part of the definition of done for every phase.
116 +- When editing an existing file that lacks a header, add it.
117 +
118 +### ABSOLUTE RULE #1 — UNDERSTAND BEFORE BUILDING
119 +
120 +Do not begin implementing KHAELOR immediately. The first phase of this project is **mandatory architectural research** (Phase 0, below). No major production implementation may begin before the research documents exist.
121 +
122 +The rule is:
123 +
124 +```
125 +UNDERSTAND FIRST → DESIGN SECOND → IMPLEMENT THIRD
126 +```
127 +
128 +### ABSOLUTE RULE #2 — THE TERMINAL IS THE PRODUCT
129 +
130 +The terminal is not merely where KHAELOR runs. The terminal **IS** the product. Any feature that technically works but is not the best terminal interaction we can design is **not finished**.
131 +
132 +### ABSOLUTE RULE #3 — SMALL KERNEL
133 +
134 +The agent kernel stays minimal. Complexity lives in services **around** the kernel, never inside it. Whenever tempted to add something to `AgentKernel`, ask: *"Can this be a service around the kernel instead?"* The answer should almost always be yes.
135 +
136 +### ABSOLUTE RULE #4 — NEVER FABRICATE
137 +
138 +Never invent token usage, progress percentages, test results, or completion claims. Every displayed number must come from real data. Every completion claim must be backed by evidence (see §14).
139 +
140 +### ABSOLUTE RULE #5 — PROTECT USER WORK
141 +
142 +Never assume an existing diff belongs to KHAELOR. Record baseline git state before edits. Never auto-commit unless explicitly requested. Never destroy uncommitted user changes.
143 +
144 +---
145 +
146 +## 3. PHASE 0 — DEEP REPOSITORY ANALYSIS (MANDATORY)
147 +
148 +Before creating the production architecture, independently inspect the **current source code** of:
149 +
150 +- https://github.com/NousResearch/hermes-agent
151 +- https://github.com/anomalyco/opencode
152 +- https://github.com/OpenHands/OpenHands
153 +- https://github.com/OpenHands/software-agent-sdk
154 +- https://github.com/SWE-agent/mini-swe-agent (where useful)
155 +
156 +Do not merely read READMEs. Clone the repositories into a reference directory **outside** KHAELOR's production source tree:
157 +
158 +```
159 +references/
160 + hermes-agent/
161 + opencode/
162 + openhands/
163 + openhands-agent-sdk/
164 + mini-swe-agent/
165 +```
166 +
167 +These are **reference implementations only**. Do not blindly copy source code. Respect their licenses. The purpose is to understand their engineering decisions and derive a better architecture.
168 +
169 +**Required deliverables before any major implementation:**
170 +
171 +```
172 +docs/research/
173 + HERMES_ANALYSIS.md
174 + OPENCODE_ANALYSIS.md
175 + OPENHANDS_ANALYSIS.md
176 + MINI_SWE_ANALYSIS.md
177 + COMPARATIVE_ARCHITECTURE.md
178 + KHAELOR_ARCHITECTURE_DECISIONS.md
179 +```
180 +
181 +For each repository, trace **real code paths**: follow imports, find the agent loops, the tool registries, the session state, the render loops, the permission checks, context construction, process execution, and persistence.
182 +
183 +### 3.1 Hermes Agent analysis
184 +
185 +Investigate at minimum:
186 +
187 +**Agent loop.** Locate the actual implementation of: user message → context construction → LLM request → tool calls → tool execution → observations → next LLM call. Determine where the central agent class lives; how messages are represented; how tool calls are parsed; how tool outputs enter context; failure handling; retry strategy; cancellation behavior; how task completion is represented.
188 +
189 +**Context management.** Prompt construction; context compression; context-window pressure handling; prompt caching; conversation summarization; memory injection; system prompt construction.
190 +
191 +**Memory.** Persistent memory; session memory; memory providers; memory search; cross-session retrieval; how memories are written and selected.
192 +
193 +**Skills.** Skill format; discovery; loading; automatic creation; improvement; persistence; context injection.
194 +
195 +**Terminal execution.** Local execution; process lifecycle; Docker; SSH; remote execution abstractions; command output; timeouts; async processes.
196 +
197 +**Subagents.** Creation; isolation; context inheritance; result propagation; concurrency; lifecycle; recursion limits.
198 +
199 +**TUI.** Layout; rendering; streaming; keyboard navigation; tool rendering; session selection; model switching; status presentation; long-output handling.
200 +
201 +Record explicitly: WHAT HERMES DOES VERY WELL / WHAT HERMES DOES POORLY / WHAT KHAELOR SHOULD ADOPT / WHAT KHAELOR SHOULD NOT COPY.
202 +
203 +### 3.2 OpenCode analysis
204 +
205 +OpenCode is particularly important for KHAELOR because of its terminal-first design. Perform the same depth of analysis, covering:
206 +
207 +**TUI framework.** Exact terminal UI libraries/frameworks; component architecture; event model; keyboard handling; resizing; scrolling; rendering strategy; markdown rendering; syntax highlighting; input editor; autocomplete; command palette; overlays/modals; diff visualization; streaming output.
208 +
209 +**Agent architecture.** Build agent, plan agent, subagents, sessions, messages, tool calls, permissions. Determine whether modes are different agents, different prompts, permission policies, or a combination.
210 +
211 +**State.** Session persistence; conversation state; project state; working directory handling; configuration; per-project settings.
212 +
213 +**Tools.** Implementations of `bash`, `read`, `write`, `edit`, `grep`, `glob`, `task/subagent`. Study their schemas carefully — especially how OpenCode avoids overwhelming the model with unnecessary tool complexity.
214 +
215 +**Permission UX.** Rules; allow/ask/deny behavior; scope; persistence; TUI confirmation interactions.
216 +
217 +**Performance.** Startup time; rendering strategy; streaming; caching; unnecessary re-renders; long-session performance. Identify what makes OpenCode feel fast even when model inference is not.
218 +
219 +### 3.3 OpenHands analysis
220 +
221 +OpenHands matters most architecturally. Study the separation between:
222 +
223 +| Concern | OpenHands concept |
224 +|---|---|
225 +| Intelligence | Agent |
226 +| Lifecycle | Conversation / Session |
227 +| Environment | Workspace |
228 +| Actions | Tools |
229 +| History | Events / EventLog |
230 +| Safety | Security analyzers / confirmation |
231 +
232 +This separation should heavily influence KHAELOR. Study: local and remote workspaces; sandbox model; file editing; shell execution; event log; persistence; security analyzers; permission confirmation; observation representation. Determine whether KHAELOR can adopt the **principles** without inheriting unnecessary framework complexity.
233 +
234 +### 3.4 mini-SWE-agent analysis
235 +
236 +Study mini-SWE-agent for one question: **How little agent scaffolding is actually necessary?**
237 +
238 +Locate its fundamental loop — conceptually: query model → execute actions → return observations → repeat. KHAELOR must preserve this philosophical minimalism inside its kernel. Complexity lives around the kernel, not inside it.
239 +
240 +### 3.5 Comparative architecture
241 +
242 +Create `docs/research/COMPARATIVE_ARCHITECTURE.md` with a decision matrix:
243 +
244 +| Capability | Hermes | OpenCode | OpenHands | mini-SWE | KHAELOR Decision |
245 +|---|---|---|---|---|---|
246 +| Agent loop | | | | | |
247 +| TUI | | | | | |
248 +| Tools | | | | | |
249 +| Sessions | | | | | |
250 +| Context | | | | | |
251 +| Memory | | | | | |
252 +| Permissions | | | | | |
253 +| Workspace | | | | | |
254 +| Events | | | | | |
255 +| Subagents | | | | | |
256 +| Processes | | | | | |
257 +| Model abstraction | | | | | |
258 +| Persistence | | | | | |
259 +| Git awareness | | | | | |
260 +| Repository search | | | | | |
261 +
262 +For every architectural choice answer: What problem does this solve? How does each reference solve it? What are the trade-offs? What should KHAELOR do differently, and why?
263 +
264 +---
265 +## 4. DESIGN PHILOSOPHY
266 +
267 +KHAELOR should feel like:
268 +
269 +```
270 +Claude Code + OpenCode + Hermes + OpenHands
271 +− accumulated complexity
272 ++ a radically better terminal interface
273 +```
274 +
275 +### Core architectural principle — a small kernel
276 +
277 +Conceptually:
278 +
279 +```python
280 +while session.active:
281 + context = context_engine.build(session.state)
282 + response = model.generate(
283 + context=context,
284 + tools=tool_registry.available(session.state),
285 + )
286 + session.record(response)
287 + observations = executor.execute(response.actions)
288 + session.record(observations)
289 + if response.requests_completion:
290 + verify()
291 +```
292 +
293 +The production implementation will require more sophistication — but the kernel must never become a god object. The kernel **coordinates**; it does not own everything.
294 +
295 +### Target system architecture
296 +
297 +```
298 + KHAELOR TUI
299 + │
300 + ▼
301 + ┌────────────────┐
302 + │ Session Engine │
303 + └───────┬────────┘
304 + │
305 + ▼
306 + ┌────────────────┐
307 + │ Agent Kernel │
308 + └───────┬────────┘
309 + │
310 + ┌──────────────────┼──────────────────┐
311 + │ │ │
312 + ▼ ▼ ▼
313 + Context Engine Tool Runtime Model Runtime
314 + │ │ │
315 + │ │ Anthropic API
316 + ▼ ▼
317 + Repository Index Workspace
318 + │
319 + ┌──────┴──────┐
320 + │ │
321 + Files Process
322 +```
323 +
324 +Future systems (Memory, Skills, Subagents, Browser, MCP, remote execution) must be attachable **without rewriting the kernel** — but they are NOT V1 priorities, and future flexibility is not an excuse for premature abstraction.
325 +
326 +---
327 +
328 +## 5. TECHNOLOGY DECISION
329 +
330 +Determine the final language/runtime **after** Phase 0 — but strongly consider **TypeScript** for: rich terminal UI, async I/O, Anthropic SDK integration, packaging, cross-platform distribution, ecosystem, and OpenCode/OpenTUI learnings.
331 +
332 +- A Rust native component is acceptable **later** for performance-critical pieces. Avoid premature polyglot architecture.
333 +- Ship as one easily installable CLI: `npm install -g khaelor` → `khaelor`.
334 +- **No Electron. No web frontend.** KHAELOR V1 is terminal-native.
335 +
336 +---
337 +
338 +## 6. ANTHROPIC INTEGRATION
339 +
340 +### Anthropic-only, cleanly isolated
341 +
342 +KHAELOR V1 supports Anthropic models only, via the official Anthropic SDK. The model layer must nevertheless be isolated behind a single interface:
343 +
344 +```ts
345 +interface ModelClient {
346 + stream(request: ModelRequest): AsyncIterable<ModelEvent>;
347 +}
348 +```
349 +
350 +Do NOT build a generic provider framework. Do NOT implement other providers. The reason for `ModelClient` is clean architecture, not multi-provider complexity.
351 +
352 +### Configuration
353 +
354 +```
355 +khaelor
356 +khaelor --model <anthropic-model>
357 +```
358 +
359 +In-app: `/model` opens an elegant model selector; `/config` opens configuration.
360 +
361 +Configuration hierarchy (highest precedence first):
362 +
363 +```
364 +CLI flags → project configuration → user configuration → environment → defaults
365 +```
366 +
367 +Files:
368 +
369 +```
370 +~/.khaelor/config.json # user
371 +.khaelor/config.json # project
372 +```
373 +
374 +Environment: `ANTHROPIC_API_KEY`.
375 +
376 +**Security requirements:**
377 +- Never display secrets.
378 +- Never write API keys or authorization headers to logs.
379 +- If an API key is entered interactively, prefer secure OS storage (keychain) where practical.
380 +
381 +### Model configuration
382 +
383 +Do not hard-code a permanent model list — Anthropic model identifiers evolve. Allow configuration such as:
384 +
385 +```json
386 +{
387 + "model": "configured-anthropic-model-id",
388 + "thinking": "adaptive",
389 + "maxOutputTokens": 16000
390 +}
391 +```
392 +
393 +`/model` should show current model, alternatives, thinking mode, and output budget. Model aliases may be supported.
394 +
395 +---
396 +
397 +## 7. STREAMING AND THE EVENT BUS
398 +
399 +### First-class streaming
400 +
401 +Streaming is native to the architecture. Never implement "request → wait → print huge response." Everything is event-driven:
402 +
403 +```
404 +ModelStarted · TextDelta · ThinkingDelta · ToolCallStarted · ToolInputDelta
405 +ToolStarted · ToolOutputDelta · ToolFinished · ModelFinished
406 +```
407 +
408 +The UI consumes events. This is essential.
409 +
410 +### Typed event bus
411 +
412 +Use typed events throughout the system:
413 +
414 +```
415 +SessionStarted · UserMessageCreated · ModelRequestStarted · ModelTextDelta
416 +ModelThinkingDelta · ModelResponseCompleted · ToolRequested · ToolApproved
417 +ToolStarted · ToolOutput · ToolCompleted · ToolFailed · FileRead · FileModified
418 +ProcessStarted · ProcessOutput · ProcessExited · ContextCompacted
419 +PermissionRequested · PermissionGranted · PermissionDenied
420 +TaskCompleted · TaskFailed
421 +```
422 +
423 +Events must be appendable to persistent session history where appropriate. The event log is the source of truth for session replay and resume.
424 +
425 +---
426 +
427 +## 8. SESSION ENGINE
428 +
429 +Agent intelligence and session lifecycle must remain separate:
430 +
431 +```
432 +AgentKernel = reason and act
433 +Session = lifecycle and history
434 +Workspace = world
435 +Tool = action
436 +Model = intelligence backend
437 +```
438 +
439 +Implement **persistent sessions early**.
440 +
441 +Commands: `/sessions` `/resume` `/new` `/rename` `/clear` — eventually `/branch` and `/rewind`.
442 +
443 +Session metadata: `id`, `title`, `project`, `createdAt`, `updatedAt`, `model`, `tokenUsage`, `cost`, `gitBranch`, `workingDirectory`.
444 +
445 +---
446 +
447 +## 9. WORKSPACE
448 +
449 +Create a clean workspace abstraction. V1 requires only `LocalWorkspace`:
450 +
451 +```ts
452 +interface Workspace {
453 + cwd(): string;
454 + readFile(path: string): Promise<string>;
455 + writeFile(path: string, content: string): Promise<void>;
456 + exec(command: Command): Promise<ProcessResult>;
457 +}
458 +```
459 +
460 +Do not implement Docker/SSH yet — but prevent the core agent from depending directly on Node filesystem/process globals everywhere.
461 +
462 +---
463 +
464 +## 10. V1 TOOLS
465 +
466 +Keep the primitive tool set intentionally small. The model should have **powerful primitives**, not dozens of tiny tools.
467 +
468 +V1 tools: `read` · `write` · `edit` · `grep` · `glob` · `bash` · `process` (and potentially `git` after careful evaluation).
469 +
470 +### read
471 +Line ranges; binary detection; file size guards; syntax metadata; efficient large-file handling. Rendered with file path header and line numbers.
472 +
473 +### write
474 +Complete-file writes. Before overwrite: understand existing file state; detect external modification; keep event history. **All new source files must include the mandatory header (Absolute Rule #0).**
475 +
476 +### edit
477 +One of the most important tools — study OpenCode and OpenHands editing implementations carefully. Requirements: exact replacements; robust patch application; useful failure messages; ambiguity detection; line-ending handling; indentation preservation; atomic writes. Provide a diff whenever possible.
478 +
479 +### grep
480 +Fast textual repository search. Prefer native high-performance tools (ripgrep) where available. Return concise structured results. Never dump thousands of lines into model context.
481 +
482 +### glob
483 +Efficient filesystem discovery (`**/*.ts`, `src/**/*.py`) with sensible ignore behavior. Respect `.gitignore` and `.khaelorignore` where appropriate.
484 +
485 +### bash vs process
486 +Shell execution and long-running processes must not be conflated. Short commands → `bash`. Long-running commands → `process`.
487 +
488 +### Process manager
489 +KHAELOR must be materially better than agents that treat every shell command as blocking.
490 +
491 +API: `process.start` · `process.list` · `process.read` · `process.write` · `process.stop`
492 +
493 +```
494 +PROCESSES
495 +● 3121 npm run dev running 04:32
496 +● 3198 pytest running 00:18
497 +○ 3012 npm test exited code 0
498 +```
499 +
500 +The agent can: start a dev server → continue editing → inspect output → run tests → inspect the dev server again.
501 +
502 +---
503 +
504 +## 11. REPOSITORY INTELLIGENCE
505 +
506 +KHAELOR should understand a repository **without stuffing it into model context**. Build an incremental repository index.
507 +
508 +V1: filesystem map · git status · git diff · grep/ripgrep · file metadata · recently accessed files.
509 +
510 +Later (not V1): AST · symbols · references · imports · dependency graph · embeddings.
511 +
512 +Expose repository intelligence exclusively through the Context Engine.
513 +
514 +---
515 +
516 +## 12. CONTEXT ENGINE
517 +
518 +One of KHAELOR's most important components. `ContextEngine` decides what the model actually receives:
519 +
520 +```
521 +SYSTEM identity · behavior · tools · project instructions
522 +WORKING CONTEXT current request · recent turns · current actions · current failures
523 +PROJECT CONTEXT relevant files · git state · repository structure
524 +CHECKPOINT earlier session summary
525 +```
526 +
527 +Do NOT simply append everything forever.
528 +
529 +### Context compaction
530 +
531 +Implement context-pressure awareness. Before context becomes dangerous, create a structured checkpoint:
532 +
533 +```yaml
534 +objective: ...
535 +completed: [...]
536 +current_state: ...
537 +important_files:
538 + - path: ...
539 + reason: ...
540 +changes: [...]
541 +failed_attempts: [...]
542 +decisions: [...]
543 +running_processes: [...]
544 +next_steps: [...]
545 +```
546 +
547 +Preserve important raw evidence when summarization could destroy necessary details. Compaction should feel invisible unless the user asks to inspect it (`/context`, `/compact`).
548 +
549 +### Project instructions
550 +
551 +Automatically discover project-level instructions. Support `KHAELOR.md`, with potential compatibility for `CLAUDE.md` and `AGENTS.md` — but define a clear precedence order:
552 +
553 +```
554 +~/.khaelor/KHAELOR.md → repository/KHAELOR.md → nested/directory/KHAELOR.md
555 +```
556 +
557 +Instructions closer to the current working path refine global instructions.
558 +
559 +---
560 +
561 +## 13. PERMISSION SYSTEM
562 +
563 +Permissions must be powerful but not annoying. Evaluate actions by **capabilities**, not arbitrary tool names:
564 +
565 +```
566 +file.read · file.write · process.execute · network.access · git.modify · filesystem.external
567 +```
568 +
569 +Policy values: `allow` · `ask` · `deny`. User-configurable, e.g.:
570 +
571 +```json
572 +{
573 + "permissions": {
574 + "file.read": "allow",
575 + "file.write.project": "allow",
576 + "process.execute": "allow",
577 + "filesystem.outsideProject": "ask"
578 + }
579 +}
580 +```
581 +
582 +Keep destructive or unusually broad actions visible to the user.
583 +
584 +### Permission UI
585 +
586 +Never show ugly `Allow? y/n` prompts. Use an elegant inline panel:
587 +
588 +```
589 +╭─ KHAELOR requests permission ─────────────────────╮
590 +│ Run │
591 +│ npm install │
592 +│ │
593 +│ Working directory │
594 +│ ~/dev/project │
595 +│ │
596 +│ [ Enter ] Allow once │
597 +│ [ A ] Always allow in this project │
598 +│ [ Esc ] Deny │
599 +╰───────────────────────────────────────────────────╯
600 +```
601 +
602 +The interaction should take milliseconds.
603 +
604 +---
605 +## 14. THE TERMINAL UI
606 +
607 +**This section is non-negotiable.** Do not create a generic `> prompt / AI: response` REPL. KHAELOR should feel like a modern interactive computing environment.
608 +
609 +### UI design principles
610 +
611 +Be: minimal · dense when needed · calm · extremely fast · keyboard-native · beautiful without being decorative · information-rich · predictable.
612 +
613 +Avoid: rainbow colors · excessive borders · ASCII gimmicks · constant animations · emoji everywhere · huge banners · screen flicker.
614 +
615 +Visual hierarchy comes from **spacing, typography, subtle color, indentation, and status** — not noise.
616 +
617 +### Startup experience
618 +
619 +`khaelor` starts nearly instantly:
620 +
621 +```
622 + KHAELOR
623 + ~/dev/my-project · main
624 + Claude · configured model
625 +────────────────────────────────────────────────────
626 + What do you want to build?
627 + ❯ _
628 +```
629 +
630 +No giant ASCII logo. No multi-second animation. No startup log spam.
631 +
632 +### Composer (highest-priority component)
633 +
634 +Features: multiline editing · cursor and word navigation · selection · copy/paste · history · undo/redo if feasible · slash commands · file mentions · fuzzy autocomplete · shell shortcuts · drag/drop paths where the terminal permits · message queueing while the agent works · image attachments later if useful.
635 +
636 +### File mentions
637 +
638 +Typing `@` opens fuzzy repository search:
639 +
640 +```
641 +@agent
642 + src/kernel/agent.ts
643 + src/agents/agent-runtime.ts
644 + tests/agent.test.ts
645 +```
646 +
647 +Selection inserts a **structured file reference**, not necessarily the entire file. Support `@src/kernel/agent.ts`; future syntax `@src/kernel/agent.ts:40-90`.
648 +
649 +### Slash command palette
650 +
651 +Typing `/` opens: `/model` `/config` `/permissions` `/context` `/sessions` `/resume` `/new` `/compact` `/cost` `/status` `/diff` `/processes` `/help` `/quit` — with fuzzy filtering, keyboard navigation, and descriptions.
652 +
653 +### Universal command palette
654 +
655 +`Ctrl+K` opens a universal palette (Change model · View diff · Open sessions · View context · Manage permissions · Show processes · Compact context · New session). Users should not need to memorize commands.
656 +
657 +### Status bar
658 +
659 +Persistent but subtle:
660 +
661 +```
662 + main +4 −1 │ Claude model │ context 31% │ $0.42
663 +```
664 +
665 +Candidates: git branch · dirty files · model · context utilization · session cost · background processes · mode. Do not overload it.
666 +
667 +### Agent states
668 +
669 +The user must always understand what KHAELOR is doing. States: thinking · reading · searching · editing · running · waiting · verifying · idle. Use one compact dynamic status line:
670 +
671 +```
672 +● Searching repository · 2.3s
673 +● Editing src/kernel/agent.ts
674 +● Running tests
675 +```
676 +
677 +Do not spam the conversation with transient status messages.
678 +
679 +### Tool call presentation
680 +
681 +Collapsed by default:
682 +
683 +```
684 +▸ Read src/kernel/agent.ts
685 +▸ Search "ContextEngine" · 14 matches
686 +▸ Edit src/context/engine.ts · +31 −12
687 +▸ Run npm test · passed
688 +```
689 +
690 +Expandable on demand; the user can toggle detail level.
691 +
692 +### Edit presentation and diff viewer
693 +
694 +Never print just "Edited file." Show `✓ src/context/engine.ts +31 −12` with instant diff expansion (e.g. key `d`).
695 +
696 +Build a beautiful terminal diff viewer (`/diff`): side-by-side when width permits; unified fallback; syntax highlighting; added/removed counts; file navigation; scrolling; accept/revert hooks in the future.
697 +
698 +### Streaming text UX
699 +
700 +Model text streams smoothly. Avoid terminal flicker, scroll jumps, full-screen re-renders, and cursor instability. The input area stays stable. Long tool output must not destroy the conversation layout.
701 +
702 +### Markdown rendering
703 +
704 +Render high-quality headings, bold, italic, inline code, code blocks, lists, tables, links, and quotes. Code blocks require syntax highlighting, horizontal scrolling or intelligent wrapping, and copy-friendly output. Never sacrifice terminal selection/copy behavior for visual tricks.
705 +
706 +### Thinking display
707 +
708 +When Anthropic surfaces reasoning through the API in a permitted way, keep its UI compact and consistent with API-permitted behavior. Do not build the product around exposing hidden reasoning. The interface primarily communicates: what the agent is doing · what tools it uses · what changed · what remains.
709 +
710 +### Interruption
711 +
712 +The user must be able to interrupt immediately (e.g. `Esc`). Cancellation propagates through model stream → tool execution → processes → agent loop, **without corrupting the session**.
713 +
714 +### Steering while working
715 +
716 +A major differentiator: the user can type while KHAELOR works. Steering messages are queued or safely injected at an appropriate boundary, displayed as `Queued instruction`. This requires careful concurrency design.
717 +
718 +### Shell mode
719 +
720 +Consider `!git status` in the composer to execute a shell command directly; results display in the conversation and may optionally become agent context.
721 +
722 +---
723 +
724 +## 15. TRANSPARENCY: COST AND CONTEXT
725 +
726 +### Cost visibility
727 +
728 +`/cost` shows session input/output tokens, cache reads/writes, and estimated cost — from **actual API usage metadata**. Never invent token usage.
729 +
730 +### Context inspector
731 +
732 +`/context` shows a budget breakdown (system, project instructions, conversation, repository context, tool observations, reserved output, total) and which files are materially represented in context. This makes KHAELOR understandable.
733 +
734 +---
735 +
736 +## 16. GIT AWARENESS
737 +
738 +KHAELOR must always understand: current branch · working tree changes · untracked files · existing user changes.
739 +
740 +- Never assume an existing diff belongs to KHAELOR.
741 +- Record baseline state before edits; clearly identify what KHAELOR changed afterward.
742 +- Do not auto-commit unless explicitly requested.
743 +- Protect user work at all times.
744 +
745 +---
746 +
747 +## 17. ERRORS, THE AGENT LOOP, AND COMPLETION
748 +
749 +### Error design
750 +
751 +Bad: `Error: command failed.`
752 +
753 +Good:
754 +
755 +```
756 +npm test failed
757 +2 tests failed
758 +src/context/engine.test.ts
759 + context compaction preserves running processes
760 +KHAELOR is inspecting the failure.
761 +```
762 +
763 +The agent normally consumes recoverable tool errors itself rather than making the user debug the agent.
764 +
765 +### Agent loop
766 +
767 +The agent iterates naturally: understand → inspect → plan internally → edit → run → observe → fix → verify → finish. Do not stop after writing code if verification is possible.
768 +
769 +### Completion standard
770 +
771 +KHAELOR never claims completion merely because the model generated a confident sentence. Before completing coding work, inspect applicable evidence: tests · type checking · linting · build · git diff · requirements · **file header compliance (Absolute Rule #0)**.
772 +
773 +Only run checks relevant to the repository — do not blindly launch massive unrelated test suites.
774 +
775 +Internally represent completion rigorously:
776 +
777 +```ts
778 +interface CompletionEvidence {
779 + objective: string;
780 + changedFiles: string[];
781 + checks: CheckResult[];
782 + unresolvedIssues: string[];
783 +}
784 +```
785 +
786 +The final user-facing response can remain concise.
787 +
788 +### Response style
789 +
790 +KHAELOR behaves like an elite technical collaborator. During work: short, specific, action-oriented. Avoid "I'll now…", "Next I'll…", "Great!", "Absolutely!". Prefer:
791 +
792 +```
793 +I found the state leak in SessionStore. Fixing that before touching the renderer.
794 +```
795 +
796 +At completion:
797 +
798 +```
799 +Implemented persistent session recovery.
800 +Changed
801 +- SessionStore now journals events atomically.
802 +- Startup restores interrupted sessions.
803 +- Added recovery tests.
804 +Checks
805 +- 148 tests passed
806 +- typecheck passed
807 +```
808 +
809 +---
810 +
811 +## 18. PERFORMANCE
812 +
813 +Performance is a feature. Measure: cold startup · input latency · render latency · tool dispatch · repository search · memory usage · session load. Do not optimize on intuition — create benchmarks where appropriate. The TUI must feel instantaneous even when the LLM requires time.
814 +
815 +**No spinner-driven UX.** The best latency UX is useful progress. Instead of `⠋ Thinking...`, prefer `● Reading src/session/store.ts` or `● Running tests · 41/148` when that information is actually known. Never fabricate progress.
816 +
817 +When latency appears, determine whether it comes from: model · network · filesystem · repository indexing · rendering · architecture. **Measure first. Optimize the correct layer.**
818 +
819 +---
820 +
821 +## 19. CONFIGURATION UX, THEMING, ACCESSIBILITY, PLATFORMS
822 +
823 +### Configuration UX
824 +
825 +`/config` opens a keyboard-navigable panel (model, agent behavior, interface, permissions). Configuration must also be editable as a file.
826 +
827 +### Theming
828 +
829 +Support terminal color capabilities intelligently. Ship **one exceptional default theme first**; `/theme` can come later. Respect `NO_COLOR`, terminal capabilities, and light/dark backgrounds where detectable. Do not prioritize theme customization over usability.
830 +
831 +### Accessibility
832 +
833 +Never communicate state through color alone — symbols and text must retain meaning in monochrome terminals. Ensure readable contrast. Keyboard-only use must be complete.
834 +
835 +### Cross-platform
836 +
837 +Primary targets: macOS and Linux. Design so Windows remains possible. Be careful about shell assumptions, path separators, PTY handling, signals, and terminal capabilities.
838 +
839 +### Logging
840 +
841 +Developer logs never pollute the TUI. Use `~/.khaelor/logs/`. Support `khaelor --debug`. Never log API keys, secret environment values, or authorization headers — redact sensitive values.
842 +
843 +---
844 +
845 +## 20. PROJECT STRUCTURE
846 +
847 +Derive the final language-specific structure after Phase 0. Conceptually:
848 +
849 +```
850 +src/
851 +├── cli/ app · commands · keyboard · lifecycle
852 +├── tui/ components/ · composer/ · markdown/ · diff/ · tool-view/ · palette/ · status/
853 +├── agent/ kernel · state · executor · completion
854 +├── anthropic/ client · streaming · messages · usage
855 +├── session/ session · events · store · checkpoint
856 +├── context/ engine · compaction · budget · project-context
857 +├── tools/ registry · read · write · edit · grep · glob · bash · process
858 +├── workspace/ local
859 +├── repository/ index · git · search
860 +├── permissions/ policy · evaluator
861 +├── config/ schema · loader · defaults
862 +└── shared/
863 +```
864 +
865 +Avoid circular dependencies. **Every file in `src/` carries the mandatory author header.**
866 +
867 +---
868 +
869 +## 21. TESTING
870 +
871 +Build tests while implementing.
872 +
873 +**Unit:** tool parsing · event reducer · context budgeting · config resolution · permission rules · file editing · process lifecycle · session persistence · **header lint check**.
874 +
875 +**Integration:** Anthropic streaming · tool execution loop · session resume · interruption · context compaction · repository modification.
876 +
877 +**TUI (where practical):** keyboard navigation · resize · long output · streaming · dialogs · permission requests · model selector · slash palette.
878 +
879 +**Golden/snapshot:** tool rendering · markdown · diffs · error panels · status lines. Do not make snapshots so broad that every intentional UI improvement becomes painful.
880 +
881 +---
882 +
883 +## 22. DOGFOODING AND BENCHMARKING
884 +
885 +### Dogfooding
886 +
887 +KHAELOR must be developed **using KHAELOR** as soon as it is sufficiently functional. Keep `docs/DOGFOOD_NOTES.md` recording friction, unexpected behavior, latency, UI annoyances, agent failures, context failures, and permission annoyances. Treat small UX friction as real bugs.
888 +
889 +### Benchmark UX against competitors
890 +
891 +After the first functional TUI exists, manually compare equivalent workflows against Claude Code, OpenCode, Hermes Agent, and OpenHands CLI. Do not copy visual appearance blindly.
892 +
893 +Measure workflows: start agent · select model · ask a repository question · inspect a tool call · approve a command · interrupt · resume · inspect diff · switch session · find file · run a background process · inspect context.
894 +
895 +Count: keystrokes · latency · screen noise · modal interruptions · clarity. KHAELOR should deliberately improve these workflows.
896 +
897 +---
898 +
899 +## 23. V1 SCOPE
900 +
901 +**V1 MUST include:**
902 +
903 +✓ exceptional TUI · ✓ Anthropic API · ✓ Anthropic model configuration · ✓ streaming · ✓ agent loop · ✓ persistent sessions · ✓ local workspace · ✓ read · ✓ write · ✓ edit · ✓ grep · ✓ glob · ✓ bash · ✓ background process manager · ✓ permission system · ✓ repository awareness · ✓ git awareness · ✓ context management · ✓ context compaction · ✓ slash commands · ✓ file mentions · ✓ command palette · ✓ model selector · ✓ diff viewer · ✓ usage/cost display · ✓ interruption · ✓ queued steering · ✓ tests · ✓ documentation · ✓ **mandatory file headers + enforcement check**
904 +
905 +**NOT V1 — do not let these derail the release:**
906 +
907 +OpenAI · Gemini · OpenRouter · local models · MCP · browser automation · computer vision · Docker · SSH · cloud execution · mobile app · web UI · multi-user server · full memory system · self-generated skills · complex multi-agent orchestration · marketplace · plugins.
908 +
909 +Design clean boundaries for them. Do not implement them yet.
910 +
911 +### Future architecture
912 +
913 +Future KHAELOR may gain: Subagents → Memory → Skills → automatic skill extraction → Browser → MCP → SSH/Docker → distributed execution. The V1 architecture must not make these impossible — but future flexibility is not an excuse for premature abstraction.
914 +
915 +---
916 +
917 +## 24. DEVELOPMENT PHASES
918 +
919 +**Phase 0 — Research.** Deliver `docs/research/*`. No major production implementation before this is complete.
920 +
921 +**Phase 1 — Architecture.** Deliver `ARCHITECTURE.md`, `EVENT_MODEL.md`, `TUI_DESIGN.md`, `TOOL_PROTOCOL.md`, `PERMISSION_MODEL.md`. Build small prototypes when necessary to validate choices.
922 +
923 +**Phase 2 — Terminal UI shell.** Startup, layout, composer, markdown, keyboard handling, stream rendering, status area, slash palette, command palette. The interface should already feel excellent using mocked model events.
924 +
925 +**Phase 3 — Anthropic integration.** Authentication, model config, streaming, tool calling, usage accounting, errors, retry, cancellation.
926 +
927 +**Phase 4 — Agent loop.** `AgentKernel`, `ToolRegistry`, `Executor`, `LocalWorkspace`, events.
928 +
929 +**Phase 5 — Core tools.** read, write, edit, grep, glob, bash, process.
930 +
931 +**Phase 6 — Sessions + context.** Persistent events, resume, context engine, compaction, checkpointing.
932 +
933 +**Phase 7 — Repository intelligence.** Git awareness, repository map, efficient search, file mentions, context retrieval.
934 +
935 +**Phase 8 — Polish.** Obsess over latency, keyboard workflows, tool rendering, diffs, permission UX, interruptions, long sessions, errors, resize behavior.
936 +
937 +---
938 +
939 +## 25. DISCIPLINE
940 +
941 +For every substantial component:
942 +
943 +1. Inspect the relevant reference implementation
944 +2. Understand its trade-offs
945 +3. Document the KHAELOR decision
946 +4. Implement a minimal clean version — **with the mandatory file header**
947 +5. Test
948 +6. Dogfood
949 +7. Simplify
950 +
951 +Do not create complexity merely because another agent framework has it.
952 +
953 +**Architecture rule.** Whenever tempted to add something to `AgentKernel`, ask: *can this be a service around the kernel?* Usually yes.
954 +
955 +**UX rule.** Whenever something technically works, ask: *is this the best terminal interaction we can design?* If no, the feature is not finished.
956 +
957 +**Speed rule.** When latency appears, measure first, then optimize the correct layer (model / network / filesystem / indexing / rendering / architecture).
958 +
959 +**Quality rule.** Never declare something complete merely because it compiles. For meaningful changes: inspect → test → use → verify.
960 +
961 +---
962 +
963 +## 26. FINAL PRODUCT STANDARD
964 +
965 +KHAELOR should eventually make someone who regularly uses Claude Code, OpenCode, Hermes, and OpenHands think:
966 +
967 +> *Why doesn't every terminal agent work like this?*
968 +
969 +The first version does not need every feature those systems possess. It needs something harder: **a fundamentally better core experience**. Build the smallest architecture capable of delivering that experience exceptionally well.
970 +
971 +---
972 +
973 +## 27. BEGIN
974 +
975 +Your first task is NOT to start coding KHAELOR. Your first task is:
976 +
977 +1. Inspect the current environment and repository
978 +2. Obtain or locate the reference repositories
979 +3. Deeply analyze Hermes Agent
980 +4. Deeply analyze OpenCode
981 +5. Deeply analyze OpenHands and its Software Agent SDK
982 +6. Inspect mini-SWE-agent for architectural minimalism
983 +7. Write the required research documents
984 +8. Derive KHAELOR's architectural decisions
985 +9. Produce `ARCHITECTURE.md` and `TUI_DESIGN.md`
986 +10. Only then begin implementation
987 +
988 +Do not stop at superficial README analysis. Trace real code paths. Read actual implementation files. Follow imports. Find the agent loops, the tool registries, the session state, the render loops, the permission checks, context construction, process execution, and persistence. Understand **why** each system works the way it does.
989 +
990 +Then build something better.
991 +
992 +---
993 +
994 +**Understand first. Design second. Implement third.**
995 +
996 +*Author: Simon-Pierre Boucher · contact@spboucher.ai*
added README.md +77 −0
@@ -0,0 +1,77 @@
1 +<!--
2 +KHAELOR
3 +File: README.md
4 +Author: Simon-Pierre Boucher
5 +Contact: contact@spboucher.ai
6 +-->
7 +
8 +# KHAELOR
9 +
10 +**A terminal-native autonomous engineering agent powered by Anthropic.**
11 +
12 +KHAELOR is not another Claude Code clone. It combines the strongest architectural ideas from Claude Code, Hermes Agent, OpenCode, OpenHands, and mini-swe-agent — with its own architecture and identity, built on one principle:
13 +
14 +```
15 +Understand first. Design second. Implement third.
16 +```
17 +
18 +## Install
19 +
20 +```sh
21 +npm install -g khaelor
22 +```
23 +
24 +Or via the hosted installer:
25 +
26 +```sh
27 +curl -fsSL https://www.khaelor.sh/install.sh | sh
28 +```
29 +
30 +## Usage
31 +
32 +```sh
33 +export ANTHROPIC_API_KEY=sk-ant-...
34 +khaelor # start the interactive TUI in the current project
35 +khaelor --model <model-id> # pick an Anthropic model
36 +khaelor --print "prompt" # non-interactive: run one agent turn, print the answer
37 +```
38 +
39 +Inside the TUI:
40 +
41 +- `/model` `/config` `/permissions` `/context` `/sessions` `/resume` `/new` `/compact` `/cost` `/status` `/diff` `/processes` `/help` `/quit`
42 +- `Ctrl+K` — universal command palette
43 +- `@` — fuzzy file mentions · `!cmd` — shell mode · `Esc` — interrupt immediately
44 +- Type while the agent works — steering messages are queued and injected safely
45 +
46 +## Architecture
47 +
48 +A deliberately small kernel surrounded by services:
49 +
50 +```
51 +TUI → Session Engine → Agent Kernel → { Context Engine · Tool Runtime · Model Runtime }
52 + Repository Index · Workspace · Permissions
53 +```
54 +
55 +- **Event-sourced sessions** — append-only JSONL logs; resume = replay
56 +- **First-class streaming** — typed event bus, 16 ms coalesced rendering
57 +- **7 powerful tools** — read · write · edit (9-strategy replacer) · grep · glob · bash · process (background process manager)
58 +- **Capability-based permissions** — allow/ask/deny with precise, persisted grants
59 +- **Context engine** — token-pressure-aware compaction with structured checkpoints, prompt-cache byte-stability
60 +- **Custom ANSI renderer** — print-once scrollback, bounded live region, flat memory, sub-millisecond input latency
61 +
62 +Design documents live in `docs/` (`ARCHITECTURE.md`, `EVENT_MODEL.md`, `TUI_DESIGN.md`, `TOOL_PROTOCOL.md`, `PERMISSION_MODEL.md`); the Phase 0 reference research lives in `docs/research/`.
63 +
64 +## Development
65 +
66 +```sh
67 +npm install
68 +npm run check # typecheck + lint + tests + mandatory header check
69 +npm run dev # run from source
70 +npx tsx src/tui/demo.ts # TUI demo with mocked model events
71 +```
72 +
73 +V1 is Anthropic-only by design. The model layer is isolated behind a single `ModelClient` interface — clean architecture, not a provider framework.
74 +
75 +## Author
76 +
77 +Simon-Pierre Boucher — contact@spboucher.ai
added docs/ARCHITECTURE.md +776 −0
@@ -0,0 +1,776 @@
1 +<!--
2 +KHAELOR
3 +File: docs/ARCHITECTURE.md
4 +Author: Simon-Pierre Boucher
5 +Contact: contact@spboucher.ai
6 +-->
7 +
8 +# KHAELOR V1 — System Architecture
9 +
10 +> **Status:** Phase 1 deliverable — the definitive system design for KHAELOR V1.
11 +> **Inputs:** `CLAUDE.md` (product spec), `docs/research/KHAELOR_ARCHITECTURE_DECISIONS.md` (ADR-1…17, binding), `docs/research/COMPARATIVE_ARCHITECTURE.md` (evidence).
12 +> **Companion:** `docs/EVENT_MODEL.md` (the complete typed event vocabulary — normative for every event named here).
13 +>
14 +> Phase 2 implementation starts from this document. Where this document and an ADR disagree, the ADR wins and this document must be corrected.
15 +
16 +---
17 +
18 +## 1. Overview
19 +
20 +KHAELOR V1 is a single-process, terminal-native, Anthropic-only agent (ADR-1, ADR-17). Its architecture rests on five load-bearing decisions:
21 +
22 +1. **A tiny, state-derived kernel** (ADR-2). The loop re-derives "what next" from recorded session state each iteration. The kernel coordinates; services own everything else.
23 +2. **An event-sourced session** (ADR-3, ADR-4). One append-only JSONL file per session is the sole source of truth. UI state, LLM message history, cost, and metadata are all projections. Resume = replay.
24 +3. **First-class streaming** (ADR-5). Everything is an event; deltas flow ephemerally to the TUI, completed blocks flow durably to the log. There is no non-streaming path.
25 +4. **Prompt-cache byte-stability as an invariant** (ADR-7). History is never rewritten; compaction — recorded as an event — is the sole sanctioned break.
26 +5. **One world seam** (ADR-13). Tools act on the world only through `Workspace`. No `node:fs` / `node:child_process` outside `src/workspace/` (and the narrow, listed exemptions).
27 +
28 +### 1.1 System diagram (refined from CLAUDE.md §4)
29 +
30 +```
31 + ┌─────────────────────────────┐
32 + │ KHAELOR TUI │
33 + │ composer · timeline · bars │
34 + └────┬───────────────▲────────┘
35 + KernelCommand│ │ coalesced events (~16 ms)
36 + │ │
37 + ┌─────────────────────────────▼───────────────┴─────────────────────────────┐
38 + │ EVENT BUS (typed, in-process) │
39 + │ durable events ──► SessionStore (JSONL append, write-ahead) │
40 + │ ephemeral deltas ──► TUI coalescer only │
41 + └────────────▲───────────────────▲──────────────────────▲───────────────────┘
42 + │ │ │
43 + ┌───────┴────────┐ ┌───────┴────────┐ ┌─────────┴─────────┐
44 + │ Session Engine │ │ Agent Kernel │ │ Process Manager │
45 + │ log·projections│◄─┤ (state-derived│ │ (background procs)│
46 + │ resume=replay │ │ loop, ADR-2) │ └─────────▲─────────┘
47 + └───────▲────────┘ └───┬───┬───┬────┘ │
48 + │ │ │ │ │
49 + │ ┌────────┘ │ └─────────┐ │
50 + │ ▼ ▼ ▼ │
51 + │ ┌──────────┐ ┌──────────┐ ┌───────────┐ │
52 + │ │ Context │ │ Model │ │ Tool │──┘
53 + │ │ Engine │ │ Runtime │ │ Runtime │──► Permissions
54 + │ │ (ADR-6/7)│ │ (ADR-10) │ │ (ADR-8) │ (ADR-9)
55 + │ └────┬─────┘ └────┬─────┘ └─────┬─────┘
56 + │ │ │ │
57 + └──────┤ Anthropic API ▼
58 + ▼ (official SDK) ┌───────────┐
59 + ┌─────────────┐ │ Workspace │──► files · processes
60 + │ Repository │───────────────►│ (ADR-13) │
61 + │ Intelligence│ └───────────┘
62 + └─────────────┘
63 +```
64 +
65 +Reading the diagram:
66 +
67 +- The **TUI never calls the engine directly.** It emits `KernelCommand`s (submit message, interrupt, approve permission, run slash command) and consumes events. Nothing imports the TUI (see §2).
68 +- The **event bus is the only "API"** (ADR-17). Durable events are appended to the session log *before* being published (write-ahead, see `EVENT_MODEL.md §5`).
69 +- The **kernel** touches exactly five services: Context Engine, Model Runtime, Tool Runtime, Session Engine (via its projection handle), and the verification gate. Permissions, workspace, and repository intelligence sit behind those services.
70 +
71 +---
72 +
73 +## 2. Module Map and Dependency Rules
74 +
75 +### 2.1 Dependency direction rules (normative)
76 +
77 +Modules are arranged in strict layers. **An arrow means "may import"; anything not listed is forbidden.** ESLint (`import/no-restricted-paths` or `eslint-plugin-boundaries`) enforces this in CI alongside the header check.
78 +
79 +```
80 +Layer 0 shared (imports nothing)
81 +Layer 1 config · workspace · anthropic · session
82 +Layer 2 permissions · repository · tools · context
83 +Layer 3 agent
84 +Layer 4 tui
85 +Layer 5 cli (composition root)
86 +```
87 +
88 +Rules, explicitly:
89 +
90 +1. **`shared` imports nothing** (except `node:` builtins for pure utilities). The event vocabulary, envelope types, the `EventBus` interface, `KernelCommand`, `Result`, and error base types live here — this is what keeps the graph acyclic, since every layer speaks in these types.
91 +2. **Nothing imports `tui` except `cli`.** The TUI is a pure consumer of events and producer of `KernelCommand`s.
92 +3. **`tui` may import only `shared` and `config`** (theme/keybinding types). It renders from its own view-model, built by folding events (see `EVENT_MODEL.md §6.1`). It never imports `agent`, `session`, `tools`, or `anthropic`.
93 +4. **`tools` may import `workspace`, `repository`, and `shared` only.** Tools never check permissions themselves (the Tool Runtime gates them, §5.4) and never touch Node fs/process globals.
94 +5. **`workspace` is the only module that imports `node:fs` and `node:child_process`.** Exemptions (each individually listed in the lint rule config): `session/store` (its own log file I/O), `config/loader` (config file I/O), `cli` (bootstrap), `shared/logging` (log files under `~/.khaelor/logs/`).
95 +6. **`anthropic` imports `shared` only** (plus the `@anthropic-ai/sdk` package). Config values are passed in; it never reads config or sessions.
96 +7. **`session` imports `shared` only.** It owns the JSONL store and all projections.
97 +8. **`context` may import `session` (projection types), `repository`, `anthropic` (the `ModelClient` interface, for the auxiliary compaction model), and `shared`.**
98 +9. **`agent` may import `anthropic`, `tools`, `context`, `session`, `permissions`, `workspace`, and `shared`.** It is the only module that wires services together below `cli`.
99 +10. **`cli` may import everything.** It is the composition root: it constructs the bus, store, workspace, runtimes, kernel, and TUI, and wires `KernelCommand` dispatch.
100 +11. **No module imports another module's internals** — only its `index.ts` barrel. Deep imports fail lint.
101 +12. **No cycles, ever.** A cycle is a build failure, not a warning.
102 +
103 +### 2.2 Module responsibilities and public interfaces
104 +
105 +Interface sketches below are the *public barrel* of each module — real, compilable-looking signatures that Phase 2–5 implement. Event types referenced (e.g. `DurableEvent`) are defined normatively in `EVENT_MODEL.md`.
106 +
107 +#### `src/shared/` — Layer 0
108 +
109 +Event vocabulary and envelopes, event bus, kernel commands, shared result/error types, logging, ids (ULID), token/byte utilities. **No business logic.**
110 +
111 +```ts
112 +// shared/events.ts — full definitions in EVENT_MODEL.md
113 +export type DurableEvent = /* discriminated union, EVENT_MODEL.md §4 */;
114 +export type EphemeralEvent = /* discriminated union, EVENT_MODEL.md §4 */;
115 +export type KhaelorEvent = DurableEvent | EphemeralEvent;
116 +
117 +export interface EventBus {
118 + publishDurable(e: DurableEventInput): DurableEvent; // append-then-publish; assigns seq/id/ts
119 + publishEphemeral(e: EphemeralEvent): void;
120 + on<T extends KhaelorEvent["type"]>(
121 + type: T,
122 + handler: (e: Extract<KhaelorEvent, { type: T }>) => void,
123 + ): Unsubscribe;
124 + onAny(handler: (e: KhaelorEvent) => void): Unsubscribe;
125 +}
126 +
127 +// shared/commands.ts — the TUI→engine channel
128 +export type KernelCommand =
129 + | { kind: "submit-message"; text: string; mentions: FileMention[] }
130 + | { kind: "steer"; text: string }
131 + | { kind: "interrupt" }
132 + | { kind: "permission-response"; requestId: string; decision: "once" | "always" | "deny" }
133 + | { kind: "slash"; command: string; args: string }
134 + | { kind: "shell"; command: string } // "!git status" composer shortcut
135 + | { kind: "quit" };
136 +
137 +export type Unsubscribe = () => void;
138 +export type Result<T, E = KhaelorError> = { ok: true; value: T } | { ok: false; error: E };
139 +```
140 +
141 +#### `src/config/` — Layer 1
142 +
143 +Schema, loading, precedence merge (CLI flags → `.khaelor/config.json` → `~/.khaelor/config.json` → env → defaults), secret hygiene (never log/echo keys), `KHAELOR.md` / `CLAUDE.md` / `AGENTS.md` instruction-file discovery with precedence.
144 +
145 +```ts
146 +export interface KhaelorConfig {
147 + model: string; // Anthropic model id — never hard-coded lists (CLAUDE.md §6)
148 + auxModel: string; // cheaper model for compaction summaries (ADR-10)
149 + thinking: "off" | "adaptive" | "always";
150 + maxOutputTokens: number;
151 + permissions: Record<string, PermissionAction>; // capability → allow|ask|deny
152 + theme: ThemeConfig;
153 +}
154 +export function loadConfig(argv: ParsedArgs, cwd: string): Promise<ResolvedConfig>;
155 +export function discoverInstructions(cwd: string): Promise<InstructionFile[]>; // ordered, global → nested
156 +export function persistPermissionGrant(scope: "project", rule: PermissionRule): Promise<void>; // ADR-9
157 +```
158 +
159 +#### `src/workspace/` — Layer 1
160 +
161 +The world seam (ADR-13). Exactly four methods plus process spawning support used by the Process Manager. `LocalWorkspace` is the only V1 implementation.
162 +
163 +```ts
164 +export interface Workspace {
165 + cwd(): string;
166 + readFile(path: string): Promise<string>;
167 + writeFile(path: string, content: string): Promise<void>; // atomic: tmp + rename
168 + exec(command: Command): Promise<ProcessResult>;
169 +}
170 +export interface Command {
171 + cmd: string; // run via user shell for `bash` tool
172 + cwd?: string;
173 + timeoutMs: number; // hard ceiling; ADR-8: long commands redirect to `process`
174 + env?: Record<string, string>;
175 + signal?: AbortSignal;
176 +}
177 +export interface ProcessResult {
178 + exitCode: number | null; // null = killed by timeout/signal
179 + stdout: string; stderr: string;
180 + durationMs: number;
181 + truncated: boolean;
182 +}
183 +export class LocalWorkspace implements Workspace { /* only module touching node:fs/child_process */ }
184 +// Tool-side helpers PARAMETERIZED BY Workspace (never fattening the interface — ADR-13):
185 +export function statFile(ws: Workspace, path: string): Promise<FileStat>;
186 +export function fileExists(ws: Workspace, path: string): Promise<boolean>;
187 +```
188 +
189 +#### `src/anthropic/` — Layer 1
190 +
191 +`ModelClient` over the official SDK (ADR-10). Streaming, typed errors, retry/backoff, cancellation, honest usage. See §7.
192 +
193 +#### `src/session/` — Layer 1
194 +
195 +Event log store (JSONL), projections, resume-by-replay, session metadata, checkpoint types. See §6.
196 +
197 +#### `src/permissions/` — Layer 2
198 +
199 +Capability policy and evaluator (ADR-9).
200 +
201 +```ts
202 +export type Capability =
203 + | "file.read" | "file.write.project" | "process.execute"
204 + | "network.access" | "git.modify" | "filesystem.outsideProject";
205 +export type PermissionAction = "allow" | "ask" | "deny";
206 +export interface PermissionRule { capability: Capability; pattern: string; action: PermissionAction; }
207 +
208 +export interface PermissionRequest {
209 + capability: Capability;
210 + descriptor: string; // e.g. "bash: npm install", "write: src/agent/kernel.ts"
211 + toolUseId: string;
212 + suggestion?: PermissionRule; // "always allow `git push *`" — omitted when the command
213 +} // contains shell operators (Hermes guard, ADR-9)
214 +
215 +export interface PermissionEvaluator {
216 + evaluate(req: PermissionRequest): PermissionAction; // last-match-wins over rules + hardline floor
217 + addGrant(rule: PermissionRule): Promise<void>; // persists via config (ADR-9)
218 +}
219 +```
220 +
221 +The evaluator is deterministic: a small unbypassable deny floor (checked against de-obfuscated command variants) → configured rules, last match wins with wildcards → default `ask` for unmatched destructive capabilities. Denials produce feedback text delivered to the model as an observation (ADR-9, rejection-with-feedback).
222 +
223 +#### `src/repository/` — Layer 2
224 +
225 +Repository intelligence, exposed **only** through the Context Engine (CLAUDE.md §11) and the tools that wrap it. V1: filesystem map, git status/diff/baseline, ripgrep search, frecency-ranked file finding for `@` mentions. No AST/embeddings/symbol index.
226 +
227 +```ts
228 +export interface RepositoryIndex {
229 + fileMap(opts?: { maxEntries?: number }): Promise<RepoFileEntry[]>; // respects .gitignore/.khaelorignore
230 + gitStatus(): Promise<GitStatus>; // branch, dirty, untracked
231 + gitDiff(paths?: string[]): Promise<GitDiff>;
232 + recordBaseline(when: "session-start" | "pre-first-edit"): Promise<GitBaseline>; // ADR-15
233 + attributeChanges(): Promise<{ khaelor: string[]; preExisting: string[] }>;
234 + search(query: RipgrepQuery): Promise<SearchResult>; // bounded, structured
235 + findFiles(fuzzy: string, limit: number): Promise<RankedFile[]>; // frecency-ranked
236 + noteAccess(path: string): void; // feeds frecency + recency
237 +}
238 +```
239 +
240 +#### `src/tools/` — Layer 2
241 +
242 +The seven primitives (ADR-8): `read · write · edit · grep · glob · bash · process`, plus the registry and the process manager. Each tool: ≤5 parameters, rich description, structured result with model-facing text and UI-facing metadata.
243 +
244 +```ts
245 +export interface ToolDefinition<In> {
246 + name: ToolName;
247 + description: string; // guidance prose lives here, not in params
248 + inputSchema: JSONSchema; // ≤5 properties
249 + capability: (input: In, ctx: ToolContext) => Capability; // drives permission evaluation
250 + execute: (input: In, ctx: ToolContext) => Promise<ToolResult>;
251 +}
252 +export interface ToolContext {
253 + workspace: Workspace;
254 + repo: RepositoryIndex;
255 + processes: ProcessManager;
256 + signal: AbortSignal; // turn-scoped; aborts in-flight tools (ADR-11)
257 + emitOutput: (chunk: string) => void; // → ephemeral ToolOutput events
258 + budget: OutputBudget; // per-result + per-turn caps, spill-to-file (ADR-8)
259 +}
260 +export interface ToolResult {
261 + modelText: string; // budgeted head/tail-truncated text with omission markers
262 + isError: boolean;
263 + spillFile?: string; // full output path under ~/.khaelor/spill/, model can read/grep it
264 + ui: ToolUiMeta; // diffStats, matchCount, exitCode… for collapsed rendering
265 + filesModified?: FileModification[];
266 +}
267 +export interface ToolRegistry {
268 + definitions(): ToolDefinition<unknown>[]; // data-driven — the ADR-16 seam
269 + get(name: string): ToolDefinition<unknown> | undefined;
270 +}
271 +export interface ProcessManager { // model-facing via the `process` tool (ADR-8)
272 + start(cmd: string, opts: { cwd?: string; name?: string }): ManagedProcess;
273 + list(): ManagedProcessInfo[];
274 + read(id: string, opts?: { offset?: number; limit?: number }): ProcessReadResult; // rolling 200K buffer
275 + write(id: string, input: string): void;
276 + stop(id: string): Promise<void>; // process-group kill (mini hygiene, ADR-8)
277 + stopAll(): Promise<void>; // shutdown only — NOT on interrupt (ADR-11)
278 +}
279 +```
280 +
281 +`edit` implements the replacer cascade (exact → line-trimmed → block-anchor → whitespace-normalized → indentation-flexible → escape-normalized → trimmed-boundary → context-aware → multi-occurrence) with uniqueness and disproportionate-match guards, CRLF/BOM preservation, atomic writes, and OpenHands-grade failure messages (line-number hints, "maybe you meant", post-edit snippet). Every successful `write`/`edit` emits a durable `FileModified` event carrying diff stats and a capped unified diff.
282 +
283 +#### `src/context/` — Layer 2
284 +
285 +The Context Engine (ADR-6/7). See §8.
286 +
287 +#### `src/agent/` — Layer 3
288 +
289 +`AgentKernel` (the loop), `deriveNext` (pure state → decision), the stream-event reducer, the Tool Runtime (permission gate + execution + observation recording), the verification gate (ADR-12), steering queue, interruption controller. See §5.
290 +
291 +#### `src/tui/` — Layer 4
292 +
293 +Terminal UI: app shell, timeline, composer, markdown renderer (settled-block streaming), diff viewer, tool views, palettes, status bar, permission panel, coalescer. Framework selected by the Phase 1 spike (ADR-14); this module's *external contract* is framework-independent:
294 +
295 +```ts
296 +export interface TuiApp {
297 + start(io: { events: EventBus; dispatch: (c: KernelCommand) => void; config: ResolvedConfig }): Promise<void>;
298 + stop(): Promise<void>;
299 +}
300 +```
301 +
302 +Internally, a `Coalescer` batches ephemeral deltas at ~16 ms (contract in `EVENT_MODEL.md §7`); the view-model is a fold over events; rendering uses settled-block incremental markdown with a bounded live region (hard caps on live-region chars/lines). No 100-message scrollback cliff.
303 +
304 +#### `src/cli/` — Layer 5
305 +
306 +Entry point, argv parsing, config resolution, composition root, lifecycle (signals, terminal setup/teardown, crash-safe restore), lazy-import discipline (§13), `khaelor --debug` logging switch.
307 +
308 +---
309 +
310 +## 3. Data & Control Flow (one turn, end to end)
311 +
312 +```
313 +user types → composer → KernelCommand{submit-message} → cli dispatcher
314 + → durable UserMessageCreated appended + published
315 + → kernel loop wakes (it is the sole consumer of "work exists" state)
316 + → ContextEngine.selectContext(projection) → ModelRequest (byte-stable tiers, ADR-7)
317 + → ModelClient.stream(request, signal)
318 + deltas → ephemeral ModelTextDelta / ModelThinkingDelta / ToolInputDelta → TUI coalescer
319 + settled → durable ModelTextBlockCompleted / ModelThinkingBlockCompleted / ToolRequested
320 + finish → durable ModelResponseCompleted {usage, stopReason}
321 + → for each ToolRequested (sequential, block order):
322 + Tool Runtime: capability → PermissionEvaluator
323 + ask → durable PermissionRequested → TUI panel → PermissionGranted/Denied
324 + durable ToolApproved → ToolStarted → execute (ephemeral ToolOutput chunks)
325 + → durable ToolCompleted | ToolFailed | ToolCancelled (+ FileModified / ProcessStarted …)
326 + → steering queue drained at the post-tool-batch seam → durable SteeringInjected
327 + → ContextEngine.onTurnComplete(usage) → maybe durable ContextPruned / ContextCompacted
328 + → loop re-derives: more tool calls? overflow? stop?
329 + → on stop with unverified code changes → verification gate (≤2 nudges) → TaskCompleted{evidence}
330 +```
331 +
332 +Every durable event is appended to the JSONL **before** subscribers see it. The TUI, the session store, and the LLM history projection all consume the same stream — streaming, history, and state cannot diverge.
333 +
334 +---
335 +
336 +## 4. The Agent Kernel (ADR-2)
337 +
338 +The kernel is a small loop that re-derives "what next" from recorded session state each iteration. Exit conditions derive from state, never from in-memory flags. Target size: a few hundred lines including the reducer — anything larger is carrying non-kernel work.
339 +
340 +### 4.1 Kernel state
341 +
342 +Per ADR-2 / mini's rule ("if a field isn't consulted by the loop itself, it belongs to a service"), the kernel holds exactly:
343 +
344 +```ts
345 +interface KernelDeps {
346 + session: SessionHandle; // projection access + durable publish
347 + context: ContextEngine;
348 + model: ModelClient;
349 + tools: ToolRuntime; // registry + permission gate + executor
350 + verifier: VerificationGate; // ADR-12
351 + steering: SteeringQueue; // ADR-11
352 + bus: EventBus;
353 +}
354 +interface KernelRunState {
355 + turnSignal: AbortController; // the cancellation root for this run (ADR-11)
356 + budget: { iterations: number; verificationAttempts: number };
357 +}
358 +```
359 +
360 +### 4.2 The loop (precise pseudocode)
361 +
362 +```ts
363 +async function runTurn(deps: KernelDeps, run: KernelRunState): Promise<TurnOutcome> {
364 + while (true) {
365 + // 1. Re-derive what to do from RECORDED state — never from loop-local flags.
366 + const state = deps.session.projection(); // in-memory, event-derived (rebuilt from
367 + const next = deriveNext(state, run.budget); // JSONL only on resume — ADR-2 trade-off)
368 +
369 + switch (next.kind) {
370 + case "inject-steering": {
371 + // Safe seam: after tool results / before the next model call (ADR-11).
372 + deps.session.publish(steeringInjected(next.queued, next.seam));
373 + continue;
374 + }
375 +
376 + case "compact": {
377 + // Proactive (token budget) or reactive (overflow error recorded). ADR-6.
378 + const checkpoint = await deps.context.compress(state, run.turnSignal.signal);
379 + deps.session.publish(contextCompacted(checkpoint)); // durable; replay-deterministic
380 + continue;
381 + }
382 +
383 + case "call-model": {
384 + const ctx = await deps.context.selectContext(state); // byte-stable tiers (ADR-7)
385 + try {
386 + for await (const ev of deps.model.stream(ctx.request, run.turnSignal.signal)) {
387 + reduceModelEvent(ev, deps); // pure reducer: deltas → ephemeral publish;
388 + } // settled blocks / tool_use / usage → durable publish
389 + } catch (err) {
390 + const klass = classifyModelError(err); // typed taxonomy (ADR-10)
391 + deps.session.publish(modelRequestFailed(klass));
392 + if (klass.kind === "context-overflow") continue; // → deriveNext yields "compact"
393 + if (klass.kind === "cancelled") continue; // → deriveNext sees Interrupted
394 + if (klass.retryable) continue; // ModelClient already backed off
395 + return { kind: "failed", error: klass }; // fatal → TaskFailed recorded by caller
396 + }
397 + continue;
398 + }
399 +
400 + case "execute-tools": {
401 + // Sequential, block order. The runtime gates permissions, executes, and records
402 + // ToolApproved/Started/Completed/Failed/Cancelled + FileModified/Process* itself.
403 + await deps.tools.executeBatch(next.pending, run.turnSignal.signal);
404 + deps.context.onTurnComplete(deps.session.projection().lastUsage); // ADR-6 observation
405 + continue;
406 + }
407 +
408 + case "verify": {
409 + // Model stopped; code changed this turn; no fresh verification evidence (ADR-12).
410 + if (run.budget.verificationAttempts >= 2) return { kind: "done", withheld: next.candidate };
411 + run.budget.verificationAttempts++;
412 + deps.session.publish(verificationRequested(next.detectedChecks, next.candidate));
413 + continue; // nudge is a synthetic message → call-model
414 + }
415 +
416 + case "interrupted": return { kind: "interrupted" }; // Interrupted event is already durable
417 + case "done": return { kind: "done" };
418 + }
419 + }
420 +}
421 +```
422 +
423 +### 4.3 `deriveNext` — a pure function of recorded state
424 +
425 +```ts
426 +function deriveNext(s: SessionProjection, budget: Budget): NextAction {
427 + if (s.interruptedSinceLastModelCall) return { kind: "interrupted" };
428 + if (s.pendingToolCalls.length > 0) return { kind: "execute-tools", pending: s.pendingToolCalls };
429 + if (s.queuedSteering.length > 0 && s.atSafeSeam) return { kind: "inject-steering", ... };
430 + if (s.contextOverflowRecorded || s.tokensUsed > s.compactionThreshold)
431 + return { kind: "compact" };
432 + if (s.lastStop === "end_turn") {
433 + const gate = needsVerification(s); // code changed this turn ∧ no fresh evidence,
434 + if (gate.required) // documentation-only changes filtered (ADR-12)
435 + return { kind: "verify", ...gate };
436 + return { kind: "done" };
437 + }
438 + if (isDoomLoop(s)) return { kind: "verify-with-user" }; // 3 byte-identical
439 + if (budget.iterations <= 0) return { kind: "done" }; // consecutive calls → ask
440 + return { kind: "call-model" };
441 +}
442 +```
443 +
444 +Properties this buys (OpenCode evidence, ADR-2): a crashed process resumes mid-conversation because nothing lives only in loop-local variables; steering and interruption are just state the next iteration observes; compaction is a task the loop derives, not a side effect buried in a handler. The stream reducer (`reduceModelEvent`) is a separate pure component from the loop.
445 +
446 +### 4.4 What is *not* in the kernel
447 +
448 +Retry/backoff (Model Runtime), permission evaluation (Tool Runtime → Permissions), output budgeting (tools), compaction algorithm (Context Engine), rendering (TUI), persistence mechanics (Session Store), git baselines (Repository). The doom-loop check and the verification gate are the only kernel-adjacent policies, and both are pure functions over the projection.
449 +
450 +---
451 +
452 +## 5. Session Engine (ADR-3)
453 +
454 +### 5.1 Storage layout
455 +
456 +```
457 +~/.khaelor/
458 + sessions/<project-hash>/
459 + <session-id>.jsonl # append-only durable event log — THE truth
460 + <session-id>.meta.json # projection cache (title, usage, cost, updatedAt) — always rebuildable
461 + spill/ # oversized tool output (size-capped)
462 + logs/ # developer logs (never the TUI)
463 +```
464 +
465 +`project-hash` = hash of the git root (or cwd when not a repo). Session ids are ULIDs — lexicographic order = creation order.
466 +
467 +### 5.2 The store
468 +
469 +```ts
470 +export interface SessionStore {
471 + create(meta: NewSessionMeta): Promise<SessionHandle>;
472 + open(sessionId: string): Promise<SessionHandle>; // resume = replay (§5.4)
473 + list(projectHash: string): Promise<SessionMeta[]>; // reads meta caches; rebuilds stale ones
474 +}
475 +export interface SessionHandle {
476 + readonly id: string;
477 + publish(e: DurableEventInput): DurableEvent; // append (write-ahead) + bus publish; assigns seq
478 + projection(): SessionProjection; // in-memory, maintained by the same reducer
479 + meta(): SessionMeta;
480 +}
481 +export interface SessionMeta { // CLAUDE.md §8
482 + id: string; title: string; project: string;
483 + createdAt: number; updatedAt: number;
484 + model: string;
485 + tokenUsage: UsageTotals; // incl. cache read/write — real API numbers only
486 + cost: number;
487 + gitBranch: string;
488 + workingDirectory: string;
489 +}
490 +```
491 +
492 +Durability discipline (mini's `finally` rule, ADR-3): the log is appended at every loop boundary — after every durable event, before the bus publishes it. Append atomicity, fsync policy, corruption recovery (truncated last line), and the versioning strategy are specified normatively in `EVENT_MODEL.md §5`.
493 +
494 +### 5.3 Projections
495 +
496 +All state is derived. Five projections, each a fold over the durable stream (full rules in `EVENT_MODEL.md §6`):
497 +
498 +| Projection | Consumers | Notes |
499 +|---|---|---|
500 +| `SessionProjection` | kernel (`deriveNext`) | pending tool calls, queued steering, last stop reason, overflow flag, files changed this turn, verification evidence |
501 +| `LlmHistory` | Context Engine | byte-stable Anthropic `messages[]`; re-applies `ContextCompacted`/`ContextPruned` deterministically |
502 +| `Timeline` | TUI view-model | messages, tool cards, diffs, status |
503 +| `UsageTotals` | `/cost`, status bar | summed from `ModelResponseCompleted.usage` only — never invented (Absolute Rule #4) |
504 +| `FileChangeSet` | `/diff`, verification gate, attribution | vs. `BaselineRecorded` (ADR-15) |
505 +
506 +Projections are caches, never truth (ADR-3 concern): each must tolerate being stale or deleted and rebuild from the log.
507 +
508 +### 5.4 Resume
509 +
510 +`open()` replays the JSONL through the same reducer that maintains live projections. Resume contract (OpenHands-derived, ADR-3): tools add-only, model swappable. On replay, any `ToolRequested` without a terminal result gets a synthetic durable `ToolCancelled` appended **at resume time** so the LLM history is protocol-valid (`EVENT_MODEL.md §6.5`). Background processes do not survive the process; `ProcessExited{cause:"khaelor-shutdown"}` is recorded at shutdown, and resume renders them as exited.
511 +
512 +Long-session replay cost is bounded by `ContextCompacted` events, which act as natural snapshots for `LlmHistory`; if `Timeline` replay is ever measured slow, periodic snapshot events are the sanctioned fix — not a database.
513 +
514 +### 5.5 Session commands
515 +
516 +`/sessions` (list via meta caches) · `/resume` · `/new` · `/rename` (durable `SessionRenamed`) · `/clear` (new session; never truncates a log). `/branch` and `/rewind` are post-V1; the envelope reserves `parentId?` (ADR-3).
517 +
518 +---
519 +
520 +## 6. Context Engine (ADR-6, ADR-7)
521 +
522 +### 6.1 Interface
523 +
524 +Hermes' verbs, exactly four:
525 +
526 +```ts
527 +export interface ContextEngine {
528 + /** Assemble the model request from the projection. V1: pass-through hook for selection
529 + * (no retrieval/topic routing yet — the verb exists so repository intelligence can
530 + * plug in without interface change). */
531 + selectContext(s: SessionProjection): Promise<BuiltContext>;
532 +
533 + /** Summarize-compact. Emits nothing itself — returns the checkpoint the kernel records
534 + * as a durable ContextCompacted event. Cuts ONLY at pairing-safe indices. */
535 + compress(s: SessionProjection, signal: AbortSignal): Promise<CompactionCheckpoint>;
536 +
537 + /** Observation hook: real usage from the last response updates budget accounting. */
538 + onTurnComplete(usage: ModelUsage): void;
539 +
540 + /** Cheap, deterministic, no-LLM: blank old tool results (protect newest N tokens).
541 + * Returns the toolUseIds to prune; kernel records ContextPruned. Runs BEFORE compress. */
542 + pruneToolResults(s: SessionProjection): PruneDecision;
543 +}
544 +export interface BuiltContext {
545 + request: ModelRequest; // system tiers + messages + tools + cache breakpoints
546 + stats: ContextStats; // per-section token estimates → /context inspector
547 +}
548 +```
549 +
550 +### 6.2 Triggers — token-based, from real usage only
551 +
552 +- **Proactive:** after each response, `onTurnComplete` compares `usage.inputTokens + usage.outputTokens` against `usableWindow = modelWindow − reservedOutput − compactionBuffer`. Crossing the threshold sets the projection's compaction flag; `deriveNext` yields `compact` at the next safe boundary. Never event-count triggers (OpenHands' named weakness).
553 +- **Reactive:** a `context-overflow` typed model error (ADR-10) records `ModelRequestFailed{kind:"context-overflow"}`; `deriveNext` routes to `compact` — never a blind retry.
554 +- **Order:** `pruneToolResults` first (cheap, deterministic — protect the newest ~40K tokens of tool output); `compress` only if still over budget.
555 +
556 +### 6.3 Compaction-as-event
557 +
558 +`ContextCompacted` is a durable event carrying the checkpoint and the exact cut range. `LlmHistory` re-applies it deterministically on every rebuild — replay-safe, inspectable (`/context`, `/compact`), and itself re-compactable later. Cut indices are chosen only where every `tool_use` before the cut has its `tool_result` before the cut (pairing safety — `EVENT_MODEL.md §6.5`). Compaction summaries route to the configured `auxModel` (ADR-10).
559 +
560 +### 6.4 Checkpoint format (structured YAML — CLAUDE.md §12)
561 +
562 +```yaml
563 +objective: <the user's current objective, one paragraph>
564 +completed:
565 + - <finished sub-goal>
566 +current_state: <where the work stands right now>
567 +important_files:
568 + - path: src/context/engine.ts
569 + reason: <why it matters to remaining work>
570 +changes:
571 + - <file-level change made so far>
572 +failed_attempts:
573 + - <approach tried and abandoned, with why>
574 +decisions:
575 + - <decision taken and rationale>
576 +running_processes:
577 + - id: <process id>
578 + command: npm run dev
579 + status: running
580 +next_steps:
581 + - <concrete next action>
582 +raw_evidence: # preserved verbatim when summarization would destroy it
583 + - label: <e.g. failing test output>
584 + content: |
585 + <capped raw text>
586 +```
587 +
588 +`failed_attempts`, `decisions`, and `running_processes` exist precisely because free-text summaries destroy them (ADR-6 trade-off).
589 +
590 +### 6.5 Prompt-cache byte-stability rules (ADR-7 — enforced by tests)
591 +
592 +1. **The system prompt is built once per session** in stable tiers: `[identity/behavior] → [tool guidance] → [project instructions]`. It is never re-rendered mid-session. `cache_control` breakpoints are placed deliberately at tier ends.
593 +2. **History is never rewritten.** Assistant blocks, tool results, and user messages are replayed byte-exact. `ContextCompacted` (and deterministic `ContextPruned` with a fixed placeholder string) are the only sanctioned breaks — both durable events, so every rebuild produces identical bytes.
594 +3. **Volatile context** (timestamps, git status, running-process lists, per-turn repository context) is injected **only into the API copy of the current user message**, never interleaved into history, never in the cached system tiers.
595 +4. **Model or instruction changes** mid-session (`ModelChanged`) start a new cache lineage; that is accepted and visible.
596 +5. Cache read/write tokens surface in `/cost` from real usage fields — cache health is observable, and a regression is a bug.
597 +
598 +---
599 +
600 +## 7. Model Runtime (ADR-10)
601 +
602 +```ts
603 +export interface ModelClient {
604 + stream(request: ModelRequest, signal: AbortSignal): AsyncIterable<ModelEvent>;
605 + countTokens?(request: ModelRequest): Promise<number>; // best-effort budgeting aid
606 +}
607 +export interface ModelRequest {
608 + model: string;
609 + system: SystemTier[]; // stable tiers with cache_control breakpoints
610 + messages: AnthropicMessage[]; // byte-stable projection (§6.5)
611 + tools: ToolSchema[];
612 + maxOutputTokens: number;
613 + thinking?: ThinkingConfig;
614 +}
615 +export type ModelEvent =
616 + | { type: "started"; requestId: string }
617 + | { type: "text-delta"; blockIndex: number; text: string }
618 + | { type: "thinking-delta"; blockIndex: number; text: string }
619 + | { type: "block-completed"; blockIndex: number; block: CompletedBlock } // text | thinking(+signature) | tool_use
620 + | { type: "finished"; stopReason: StopReason; usage: ModelUsage };
621 +export interface ModelUsage { // real API fields ONLY — never estimated (Rule #4)
622 + inputTokens: number; outputTokens: number;
623 + cacheReadTokens: number; cacheWriteTokens: number;
624 +}
625 +```
626 +
627 +**Error taxonomy** (typed, kernel branches on it):
628 +
629 +```ts
630 +export type ModelErrorKind =
631 + | "retryable" // 429 / 5xx / network — retried inside ModelClient with jittered
632 + // exponential backoff and a retry budget; surfaced only on exhaustion
633 + | "context-overflow" // routed to Context Engine (reactive compaction) — NEVER retried blindly
634 + | "auth" // fatal; actionable message; never logs the key
635 + | "invalid-request" // fatal; a KHAELOR bug — surfaced loudly
636 + | "cancelled"; // AbortSignal fired — not an error path, folds into Interrupted state
637 +export class ModelError extends Error {
638 + kind: ModelErrorKind; retryable: boolean; status?: number; requestId?: string;
639 +}
640 +```
641 +
642 +**Cancellation** is AbortSignal end to end: turn controller → SDK request → the async iterable throws `ModelError{kind:"cancelled"}`. No thread flags, no scattered checks (ADR-11).
643 +
644 +**Accounting:** `finished.usage` is the only source for `/cost` and compaction budgets. Two configured model ids share this one interface: `model` (main) and `auxModel` (compaction) — no provider framework, no second implementation.
645 +
646 +---
647 +
648 +## 8. Interruption & Steering (ADR-11)
649 +
650 +**Interrupt (`Esc`):**
651 +
652 +1. TUI dispatches `KernelCommand{interrupt}` → durable `Interrupted` event → `run.turnSignal.abort()`.
653 +2. The model stream aborts; in-flight tools receive the signal, get a 250 ms grace, then are cancelled.
654 +3. Every dangling `tool_use` is closed with a synthetic cancelled `tool_result` — recorded as durable `ToolCancelled` — so history is **protocol-valid at all times**.
655 +4. Background `process`-managed processes are **not** killed (explicitly long-lived).
656 +5. The loop's next `deriveNext` observes the interrupted state and returns; the session is intact and immediately usable.
657 +
658 +**Steering:** text typed while the agent works becomes a durable `SteeringQueued` event, shown as `Queued instruction`. The queue drains at exactly two seams — post-tool-batch and pre-model-call — recorded as `SteeringInjected` and appended into the API-copy content alongside tool results (never breaking role alternation). A long uninterrupted text stream cannot be steered until it completes or is cancelled — accepted price (ADR-11).
659 +
660 +---
661 +
662 +## 9. Completion & Verification (ADR-12)
663 +
664 +When the model stops (`end_turn`) and the `FileChangeSet` shows code changed this turn without fresh verification evidence, the gate:
665 +
666 +1. Detects relevant check commands from the repository (package scripts, test configs) — never blind full suites.
667 +2. Records `VerificationRequested{detectedChecks, attempt}` and **withholds the candidate answer** (preserved — budget exhaustion returns it rather than losing it).
668 +3. Injects a synthetic evidence-bearing nudge; max 2 attempts; documentation-only changes are filtered out.
669 +4. On acceptance records `TaskCompleted` carrying:
670 +
671 +```ts
672 +interface CompletionEvidence {
673 + objective: string;
674 + changedFiles: string[];
675 + checks: CheckResult[]; // command, exitCode, summary — real results only
676 + unresolvedIssues: string[];
677 +}
678 +```
679 +
680 +Completion is inferred from stop-without-tool-calls plus this gate (no finish tool in V1); if dogfooding shows ambiguity, an explicit finish signal is addable without kernel changes (ADR-12 concern, recorded).
681 +
682 +---
683 +
684 +## 10. Permissions (ADR-9) — placement summary
685 +
686 +Evaluation happens in exactly one place: the Tool Runtime, between `ToolRequested` and `ToolStarted`. Flow: capability derivation from tool input → hardline deny floor → last-match-wins rules → `allow` (durable `ToolApproved`) / `ask` (durable `PermissionRequested` → inline panel → `PermissionGranted{scope}` or `PermissionDenied`) / `deny`. "Always allow" persists a scoped rule to project config **and** records the grant event. Denial text returns to the model as the tool result observation (course correction, not dead end). "Silence is not consent": an unanswered request never auto-approves. Full model in the Phase 1 `PERMISSION_MODEL.md`.
687 +
688 +---
689 +
690 +## 11. Concurrency Model
691 +
692 +**One Node process, one event loop** (ADR-1, ADR-17). Concurrency is structured async, not threads.
693 +
694 +Concurrent at any moment:
695 +
696 +| Activity | Mechanism | Notes |
697 +|---|---|---|
698 +| Model stream consumption | async iterable | one at a time per session |
699 +| Tool execution | async, **sequential within a batch** in V1 | parallel read-only tools = post-V1 optimization, measured first |
700 +| Background processes | child processes + stream I/O | rolling buffers; outlive turns, not the process |
701 +| TUI input handling | stdin events | always responsive — never awaited behind engine work |
702 +| TUI rendering | 16 ms coalescer flush | bounded live region keeps render work small |
703 +| Log appends | serialized per-session write queue | write-ahead of publish |
704 +
705 +**Cancellation tree:** `session controller → turn controller → { model request, each tool execution }`. `Esc` aborts the turn controller only. `SIGINT`/quit aborts the session controller, stops background processes (`stopAll`), flushes the log, restores the terminal.
706 +
707 +**Recorded risk (ADR-17):** render work and tool I/O share the event loop. Mitigations: bounded live region + coalescing keep render slices small; the bus boundary is clean so moving the engine into a `worker_thread` later is a packaging change. If Phase 8 measurements show contention, that is the sanctioned escape hatch — measure first.
708 +
709 +**Ordering guarantee:** for a given session, durable events are appended and published in `seq` order; ephemeral deltas for a block are always delivered to the TUI before the durable event that settles that block (`EVENT_MODEL.md §7`).
710 +
711 +---
712 +
713 +## 12. Startup Sequence & Performance Budget
714 +
715 +### 12.1 Cold-start sequence
716 +
717 +```
718 +t0 node boots; cli entry parses argv (no framework, hand-rolled — zero-dep parse)
719 +t1 load config files (2 small JSON reads) + env; NO dotenv autoload; no network
720 +t2 initialize terminal + render the startup shell (header, prompt) — FIRST PAINT
721 + ── everything below is lazy / background ──
722 +bg git status + branch (async → fills status bar when ready)
723 +bg session store init (create/open lazily on first message or /resume)
724 +bg instruction-file discovery (KHAELOR.md etc.)
725 +lazy @anthropic-ai/sdk — imported on first model call
726 +lazy markdown/highlight/diff — imported on first render that needs them
727 +lazy ripgrep spawn — on first grep/glob/@-mention
728 +```
729 +
730 +The Anthropic key is validated on first use, not at startup (a missing key renders an actionable inline message, not a boot failure).
731 +
732 +### 12.2 Budgets (measured in CI where practical; ADR-1 lazy-import discipline)
733 +
734 +| Metric | Budget |
735 +|---|---|
736 +| Cold start → first paint, interactive prompt | **< 150 ms** |
737 +| Keystroke → echo (input latency) | **< 16 ms** |
738 +| Render frame during full-speed token stream | **< 16 ms** (one flush per frame) |
739 +| Tool dispatch overhead (gate + record, excl. tool work) | < 5 ms |
740 +| Session resume, 10K durable events | < 500 ms |
741 +| Memory, 4-hour session | bounded (capped live region, virtualized scrollback, rolling process buffers) |
742 +
743 +A startup benchmark script and an import-graph check (no heavy module in the boot path) are part of Phase 2's definition of done. No spinner-driven UX: status lines show real activity (`● Reading src/session/store.ts`), never fabricated progress (Absolute Rule #4).
744 +
745 +---
746 +
747 +## 13. V1 Non-Goals and Extension Seams (ADR-16, ADR-17)
748 +
749 +Explicitly **not** in V1 — with the seam that keeps each addable without kernel rewrites. Boundaries only; no premature abstraction beyond what is listed.
750 +
751 +| Post-V1 capability | V1 seam (already present) | What is NOT built now |
752 +|---|---|---|
753 +| Subagents | every event carries `sessionId`; tool registry is data-driven; child = new session with derived permissions | no task tool, no depth/budget machinery, no child UI |
754 +| Memory | `ContextEngine.selectContext` is the injection point; frozen-snapshot rule inherited from ADR-7 | no providers, no background review, no curation |
755 +| Skills | instruction-file discovery + data-driven registry | no skill format, loading, or self-generation |
756 +| MCP | `ToolDefinition`/`ToolRegistry` are plain data | no client, transport, or config surface |
757 +| Multi-provider | `ModelClient` is the single boundary | no adapter framework, no second implementation |
758 +| Docker/SSH remote | 4-method `Workspace`; strategy will be "run the core remotely", not per-syscall proxying | no `Workspace` implementations beyond local |
759 +| Shadow-git snapshots / revert | baselines + snapshot hashes representable as events | no shadow repo machinery |
760 +| Session branch/rewind | linear log; envelope reserves `parentId?` | no tree invariants |
761 +| Daemon / IDE / `khaelor serve` | the typed bus vocabulary is the only "API"; engine↔TUI boundary is command/event only | no server, sockets, or RPC |
762 +| `worker_thread` engine split | clean bus boundary (§11) | not until Phase 8 measurements demand it |
763 +
764 +Also not V1: OpenAI/Gemini/OpenRouter/local models, browser automation, computer vision, cloud execution, web UI, multi-user, plugins, marketplace (CLAUDE.md §23).
765 +
766 +---
767 +
768 +## 14. Cross-References
769 +
770 +- `docs/EVENT_MODEL.md` — normative event vocabulary, JSONL format, projection rules, coalescing contract, bus API.
771 +- `docs/research/KHAELOR_ARCHITECTURE_DECISIONS.md` — ADR-1…17 (binding rationale).
772 +- Phase 1 remaining deliverables: `TUI_DESIGN.md` (incl. the ADR-14 framework spike report), `TOOL_PROTOCOL.md`, `PERMISSION_MODEL.md`.
773 +
774 +---
775 +
776 +*Author: Simon-Pierre Boucher · contact@spboucher.ai*
added docs/DOGFOOD_NOTES.md +45 −0
@@ -0,0 +1,45 @@
1 +<!--
2 +KHAELOR
3 +File: docs/DOGFOOD_NOTES.md
4 +Author: Simon-Pierre Boucher
5 +Contact: contact@spboucher.ai
6 +-->
7 +
8 +# KHAELOR — Dogfood Notes
9 +
10 +Per CLAUDE.md §22: KHAELOR must be developed using KHAELOR as soon as it is sufficiently
11 +functional. This journal records friction, unexpected behavior, latency, UI annoyances,
12 +agent failures, context failures, and permission annoyances. Small UX friction is a real bug.
13 +
14 +Entry format:
15 +
16 +```
17 +## YYYY-MM-DD — <short title>
18 +Context: what was being done
19 +Friction: what felt wrong (with numbers where possible)
20 +Severity: annoyance | slowdown | blocker
21 +Action: issue filed / fixed in <commit> / open
22 +```
23 +
24 +---
25 +
26 +## 2026-08-09 — Journal opened
27 +
28 +First functional end-to-end assembly of V1 (CLI wiring in progress). No dogfood sessions
29 +run yet — entries begin with the first real KHAELOR-on-KHAELOR session.
30 +
31 +## 2026-08-09 — Typed text invisible while composing
32 +
33 +Context: First real interactive run (`npx tsx src/cli/main.ts` / installed `khaelor`).
34 +Friction: Keystrokes produced no visible echo — typed text only appeared after Enter,
35 + when the submitted message settled into scrollback. Root cause: key handling
36 + mutated composer state but never set the renderer's dirty flag, so the
37 + post-keystroke `flushNow()` hit the "nothing dirty, nothing settled" early
38 + return and painted nothing. Echo only worked while a stream happened to be
39 + repainting anyway. Reproduced under a real PTY (expect): 0 repaint bytes
40 + after typing while idle.
41 +Severity: blocker
42 +Action: fixed — stdin key dispatch now marks the live region dirty before the
43 + immediate flush; regression covered by tests/tui/pty-echo.test.ts (PTY
44 + integration, asserts echo before Enter). Same session: composer promoted
45 + to the bordered box per TUI_DESIGN §3.1.
added docs/EVENT_MODEL.md +607 −0
@@ -0,0 +1,607 @@
1 +<!--
2 +KHAELOR
3 +File: docs/EVENT_MODEL.md
4 +Author: Simon-Pierre Boucher
5 +Contact: contact@spboucher.ai
6 +-->
7 +
8 +# KHAELOR V1 — Event Model
9 +
10 +> **Status:** Phase 1 deliverable — the complete typed event vocabulary. **Normative** for `docs/ARCHITECTURE.md` and all Phase 2–6 implementation.
11 +> **Inputs:** CLAUDE.md §7 (base vocabulary), ADR-3 (event-sourced JSONL), ADR-4 (typed bus, durable/ephemeral split, 16 ms coalescing), ADR-5 (streaming), ADR-6/7 (compaction-as-event, byte-stability), ADR-11 (interruption/steering), ADR-12 (completion), ADR-15 (git baseline).
12 +>
13 +> The event log is the source of truth for session replay and resume (CLAUDE.md §7). Everything else — UI state, LLM message history, cost, metadata — is a projection.
14 +
15 +---
16 +
17 +## 1. Design Rules
18 +
19 +1. **Two classes of event.** **DURABLE** events are appended to the session JSONL *before* being published on the bus (write-ahead), and carry a per-session monotonic `seq`. **EPHEMERAL** events (streaming deltas) flow to the TUI only and are never persisted (ADR-4).
20 +2. **The completed block is the durable record.** Deltas are lossy by design; when a stream closes a block, the settled content is recorded durably (`ModelTextBlockCompleted`, `ToolRequested`, …). A crash mid-block loses at most the in-flight block — OpenCode behaves identically (ADR-4).
21 +3. **Rendering never lives on events.** Payloads are domain data; presentation is keyed by `type` inside the TUI (OpenHands `visualize` anti-pattern excluded, ADR-4).
22 +4. **Every event carries `sessionId`** — the cheap seam subagents-as-child-sessions depends on (ADR-16).
23 +5. **Payloads are bounded.** Anything that could be huge (tool output, diffs) is stored budget-truncated with an explicit marker, with full content spilled to a file path (ADR-8). The log never stores unbounded blobs.
24 +6. **Honest data only.** Usage, cost, exit codes, and check results come from real sources; no event may carry fabricated numbers (Absolute Rule #4).
25 +7. **Naming:** past-tense facts (`ToolCompleted`), not commands. Commands are `KernelCommand`s (`ARCHITECTURE.md §2.2`), which *cause* events but are not events.
26 +
27 +---
28 +
29 +## 2. Envelopes
30 +
31 +```ts
32 +// shared/events.ts
33 +
34 +/** Durable envelope — one JSONL line per event. */
35 +export interface Durable<T extends string, P> {
36 + v: 1; // schema version of this event line (§5.4)
37 + id: string; // ULID — globally unique, time-ordered
38 + sessionId: string;
39 + seq: number; // monotonic per session, gapless, assigned at append time
40 + ts: number; // epoch milliseconds
41 + parentId?: string; // reserved, always absent in V1 (ADR-3: linear log, tree-ready)
42 + type: T;
43 + payload: P;
44 +}
45 +
46 +/** Ephemeral envelope — bus-only, never persisted. No seq (no log position), no v. */
47 +export interface Ephemeral<T extends string, P> {
48 + id: string; // ULID (correlation/debugging)
49 + sessionId: string;
50 + ts: number;
51 + type: T;
52 + payload: P;
53 +}
54 +
55 +/** What producers hand to the bus; envelope fields are assigned by the store/bus. */
56 +export type DurableEventInput = { type: DurableEvent["type"]; payload: DurableEvent["payload"] };
57 +```
58 +
59 +---
60 +
61 +## 3. Catalog Summary — DURABLE vs EPHEMERAL
62 +
63 +| # | Event | Class | Rationale |
64 +|---|---|---|---|
65 +| 1 | `SessionStarted` | **D** | Anchors the log: cwd, model, config snapshot. Required by every projection. |
66 +| 2 | `SessionResumed` | **D** | Audit trail; marks replay boundaries; records model/tool-set verification (resume contract, ADR-3). |
67 +| 3 | `SessionRenamed` | **D** | `/rename` must survive restart; metadata is a projection (Rule: derivable from the log). |
68 +| 4 | `ModelChanged` | **D** | LLM history and cost projections must know which model produced which turns; starts a new cache lineage (ADR-7). |
69 +| 5 | `BaselineRecorded` | **D** | Attribution (KHAELOR's changes vs user's) must survive resume (ADR-15). |
70 +| 6 | `UserMessageCreated` | **D** | Conversation truth; LLM history input. |
71 +| 7 | `SteeringQueued` | **D** | Queued instructions must survive a crash before injection (ADR-11); UI shows `Queued instruction` after resume. |
72 +| 8 | `SteeringInjected` | **D** | The injection point alters LLM history; replay must reproduce identical bytes (ADR-7). |
73 +| 9 | `Interrupted` | **D** | `deriveNext` consumes it from state; explains truncated turns on replay (ADR-11). |
74 +| 10 | `ModelRequestStarted` | **D** | Correlates blocks/usage to a request; records model id + context stats for `/context` history. Small payload — never the full prompt (rebuildable by projection). |
75 +| 11 | `ModelTextDelta` | **E** | Pure streaming UX; settled text is durably recorded by #13. Persisting deltas would bloat the log for zero replay value (ADR-4). |
76 +| 12 | `ModelThinkingDelta` | **E** | Same as #11. |
77 +| 13 | `ModelTextBlockCompleted` | **D** | The durable record of assistant text — byte-exact for LLM history replay (ADR-7). |
78 +| 14 | `ModelThinkingBlockCompleted` | **D** | Thinking blocks (+ signature) must be replayed byte-exact in assistant turns during tool loops — API requirement; hence durable. |
79 +| 15 | `ToolCallStarted` | **E** | "Model began emitting a tool_use block" — UI hint only; input not yet complete. Durable record is #17. |
80 +| 16 | `ToolInputDelta` | **E** | Streaming partial JSON input; UI preview only. |
81 +| 17 | `ToolRequested` | **D** | The complete `tool_use` block (id, name, input) — doubles as the durable assistant-block record and the pending-work marker `deriveNext` consumes (ADR-2). |
82 +| 18 | `ModelResponseCompleted` | **D** | Stop reason + **real usage** — the only source of cost/compaction accounting (Rule #4, ADR-6/10). |
83 +| 19 | `ModelRequestFailed` | **D** | Typed error class; `context-overflow` drives reactive compaction on the *next* derivation, so it must be state (ADR-6/10). |
84 +| 20 | `PermissionRequested` | **D** | Pending approval = persisted unanswered event; approvals survive restarts (OpenHands pattern, ADR-9). |
85 +| 21 | `PermissionGranted` | **D** | Consent record + scope (`once`/`always`); audit. |
86 +| 22 | `PermissionDenied` | **D** | Denial + feedback text that becomes the model-facing observation (ADR-9). |
87 +| 23 | `ToolApproved` | **D** | Execution authorization (auto-allow or granted); separates policy outcome from execution start. |
88 +| 24 | `ToolStarted` | **D** | Execution actually began; duration accounting; distinguishes "approved but crashed before running" on replay. |
89 +| 25 | `ToolOutput` | **E** | Live output chunks. The budgeted result is durably recorded by #26/#27; persisting raw chunks would duplicate it unbounded (ADR-8). |
90 +| 26 | `ToolCompleted` | **D** | The `tool_result` content the model saw — byte-exact for LLM history (ADR-7); includes spill path + UI meta. |
91 +| 27 | `ToolFailed` | **D** | Error `tool_result` (is_error) the model saw; error kind for diagnostics. |
92 +| 28 | `ToolCancelled` | **D** | Synthetic cancelled `tool_result` — keeps tool_use/tool_result pairing protocol-valid across interrupt/crash (ADR-11, §6.5). |
93 +| 29 | `FileRead` | **D** | Tiny payload; feeds recency/frecency, `/context` file list, and external-modification detection. Cheap and useful ⇒ durable. |
94 +| 30 | `FileModified` | **D** | Change set, diff stats, capped diff — powers `/diff`, attribution, and the verification gate after resume (ADR-12/15). |
95 +| 31 | `ProcessStarted` | **D** | Process registry state; checkpoint field `running_processes` derives from it (ADR-6). |
96 +| 32 | `ProcessOutput` | **E** | Rolling in-memory buffer (200K) is the read model; processes die with the KHAELOR process, so persisted output has no replay value. Model access is via `process.read`, recorded as that tool's result. |
97 +| 33 | `ProcessExited` | **D** | Terminal state + cause; resume renders processes as exited. |
98 +| 34 | `ContextPruned` | **D** | Deterministic replay: the exact pruned toolUseIds must be re-applied byte-identically on every rebuild (ADR-6/7). |
99 +| 35 | `ContextCompacted` | **D** | Compaction-as-event: checkpoint + cut range, re-applied deterministically; doubles as a replay snapshot (ADR-6). |
100 +| 36 | `VerificationRequested` | **D** | Gate attempts are budgeted (≤2) — the count must be derivable from state; preserves the withheld candidate (ADR-12). |
101 +| 37 | `TaskCompleted` | **D** | Carries `CompletionEvidence` — the rigorous completion record (CLAUDE.md §17). |
102 +| 38 | `TaskFailed` | **D** | Terminal failure + typed reason. |
103 +
104 +**32 durable, 6 ephemeral.** Anything not in this table is not an event.
105 +
106 +---
107 +
108 +## 4. Type Definitions (normative)
109 +
110 +```ts
111 +// ───────────────────────── shared payload types ─────────────────────────
112 +
113 +export type StopReason = "end_turn" | "tool_use" | "max_tokens" | "refusal";
114 +
115 +export interface ModelUsage { // real API fields only
116 + inputTokens: number;
117 + outputTokens: number;
118 + cacheReadTokens: number;
119 + cacheWriteTokens: number;
120 +}
121 +
122 +export interface DiffStats { added: number; removed: number; }
123 +
124 +export interface CheckResult {
125 + command: string;
126 + exitCode: number;
127 + summary: string; // e.g. "148 passed", "typecheck passed"
128 + durationMs: number;
129 +}
130 +
131 +export interface CompletionEvidence { // CLAUDE.md §17
132 + objective: string;
133 + changedFiles: string[];
134 + checks: CheckResult[];
135 + unresolvedIssues: string[];
136 +}
137 +
138 +export interface GitBaseline {
139 + branch: string;
140 + dirtyFiles: string[];
141 + untrackedFiles: string[];
142 + diffHash: string; // hash of `git diff` output at capture time
143 +}
144 +
145 +export type ModelErrorKind =
146 + | "retryable" | "context-overflow" | "auth" | "invalid-request" | "cancelled";
147 +
148 +export type ToolName =
149 + | "read" | "write" | "edit" | "grep" | "glob" | "bash" | "process";
150 +
151 +// ─────────────────────── session lifecycle (durable) ───────────────────────
152 +
153 +export type SessionStarted = Durable<"session.started", {
154 + title: string;
155 + projectHash: string;
156 + workingDirectory: string;
157 + gitBranch: string | null;
158 + model: string;
159 + auxModel: string;
160 + khaelorVersion: string;
161 +}>;
162 +
163 +export type SessionResumed = Durable<"session.resumed", {
164 + khaelorVersion: string;
165 + replayedSeq: number; // highest seq replayed
166 + model: string; // active model after resume (may differ — swappable)
167 + toolNames: ToolName[]; // verified add-only vs. original set (ADR-3 resume contract)
168 +}>;
169 +
170 +export type SessionRenamed = Durable<"session.renamed", { title: string }>;
171 +
172 +export type ModelChanged = Durable<"session.model-changed", {
173 + from: string;
174 + to: string;
175 + reason: "user" | "config";
176 +}>;
177 +
178 +export type BaselineRecorded = Durable<"git.baseline-recorded", {
179 + when: "session-start" | "pre-first-edit";
180 + baseline: GitBaseline;
181 +}>;
182 +
183 +// ───────────────────────── user input (durable) ─────────────────────────
184 +
185 +export type UserMessageCreated = Durable<"user.message-created", {
186 + text: string; // byte-exact — enters LLM history verbatim
187 + mentions: { path: string; range?: { start: number; end: number } }[];
188 +}>;
189 +
190 +export type SteeringQueued = Durable<"user.steering-queued", {
191 + text: string;
192 +}>;
193 +
194 +export type SteeringInjected = Durable<"user.steering-injected", {
195 + queuedEventId: string; // id of the SteeringQueued event
196 + seam: "post-tool-batch" | "pre-model-call";
197 + afterSeq: number; // injection position in history — makes replay exact (ADR-7)
198 +}>;
199 +
200 +export type Interrupted = Durable<"user.interrupted", {
201 + scope: "turn"; // V1: Esc aborts the turn (model stream + in-flight tools)
202 + pendingToolUseIds: string[]; // tools that will be closed via ToolCancelled
203 +}>;
204 +
205 +// ──────────────────────────── model stream ────────────────────────────
206 +
207 +export type ModelRequestStarted = Durable<"model.request-started", {
208 + requestId: string; // correlates all blocks/usage of this call
209 + model: string;
210 + purpose: "main" | "compaction" | "verification-nudge";
211 + contextStats: { // for /context history — estimates labeled as such
212 + estimatedInputTokens: number;
213 + sections: { name: string; estimatedTokens: number }[];
214 + };
215 +}>;
216 +
217 +export type ModelTextDelta = Ephemeral<"model.text-delta", {
218 + requestId: string;
219 + blockIndex: number;
220 + text: string;
221 +}>;
222 +
223 +export type ModelThinkingDelta = Ephemeral<"model.thinking-delta", {
224 + requestId: string;
225 + blockIndex: number;
226 + text: string;
227 +}>;
228 +
229 +export type ToolCallStarted = Ephemeral<"model.tool-call-started", {
230 + requestId: string;
231 + blockIndex: number;
232 + toolUseId: string;
233 + toolName: ToolName;
234 +}>;
235 +
236 +export type ToolInputDelta = Ephemeral<"model.tool-input-delta", {
237 + requestId: string;
238 + blockIndex: number;
239 + toolUseId: string;
240 + partialJson: string;
241 +}>;
242 +
243 +export type ModelTextBlockCompleted = Durable<"model.text-block-completed", {
244 + requestId: string;
245 + blockIndex: number;
246 + text: string; // byte-exact settled block
247 +}>;
248 +
249 +export type ModelThinkingBlockCompleted = Durable<"model.thinking-block-completed", {
250 + requestId: string;
251 + blockIndex: number;
252 + thinking: string;
253 + signature: string; // required for byte-exact API replay in tool loops
254 +}>;
255 +
256 +export type ToolRequested = Durable<"tool.requested", {
257 + requestId: string;
258 + blockIndex: number;
259 + toolUseId: string; // Anthropic tool_use id — pairing key (§6.5)
260 + toolName: ToolName;
261 + input: unknown; // complete parsed input — byte-exact via canonical JSON (§5.1)
262 +}>;
263 +
264 +export type ModelResponseCompleted = Durable<"model.response-completed", {
265 + requestId: string;
266 + stopReason: StopReason;
267 + usage: ModelUsage; // REAL API usage — sole source for cost/compaction
268 + durationMs: number;
269 +}>;
270 +
271 +export type ModelRequestFailed = Durable<"model.request-failed", {
272 + requestId: string;
273 + kind: ModelErrorKind;
274 + message: string; // redacted — never headers/keys
275 + status?: number;
276 + retriesExhausted: boolean;
277 +}>;
278 +
279 +// ─────────────────────── permissions (durable) ───────────────────────
280 +
281 +export type PermissionRequested = Durable<"permission.requested", {
282 + permissionRequestId: string;
283 + toolUseId: string;
284 + capability: string; // Capability
285 + descriptor: string; // human-meaningful: "Run `npm install` in ~/dev/project"
286 + suggestion?: { capability: string; pattern: string }; // "always allow git push *" (ADR-9)
287 +}>;
288 +
289 +export type PermissionGranted = Durable<"permission.granted", {
290 + permissionRequestId: string;
291 + scope: "once" | "always-project"; // "always" also persists a config rule (ADR-9)
292 +}>;
293 +
294 +export type PermissionDenied = Durable<"permission.denied", {
295 + permissionRequestId: string;
296 + source: "user" | "policy" | "hardline" | "timeout"; // silence is not consent (ADR-9)
297 + feedback: string; // returned to the model as the tool observation
298 +}>;
299 +
300 +// ─────────────────────── tool execution (durable + one ephemeral) ───────────────────────
301 +
302 +export type ToolApproved = Durable<"tool.approved", {
303 + toolUseId: string;
304 + via: "policy-allow" | "user-once" | "user-always" | "rule";
305 +}>;
306 +
307 +export type ToolStarted = Durable<"tool.started", {
308 + toolUseId: string;
309 + toolName: ToolName;
310 +}>;
311 +
312 +export type ToolOutput = Ephemeral<"tool.output", {
313 + toolUseId: string;
314 + chunk: string; // live chunk, ANSI-stripped for TUI
315 +}>;
316 +
317 +export type ToolCompleted = Durable<"tool.completed", {
318 + toolUseId: string;
319 + modelText: string; // byte-exact tool_result content (budget-truncated w/ markers)
320 + spillFile?: string; // full output under ~/.khaelor/spill/ (ADR-8)
321 + durationMs: number;
322 + ui: { // presentation DATA, not presentation (Rule 3)
323 + kind: "read" | "search" | "edit" | "exec" | "process";
324 + summary: string; // e.g. `Search "ContextEngine" · 14 matches`
325 + diffStats?: DiffStats;
326 + exitCode?: number;
327 + matchCount?: number;
328 + };
329 +}>;
330 +
331 +export type ToolFailed = Durable<"tool.failed", {
332 + toolUseId: string;
333 + modelText: string; // byte-exact is_error tool_result content
334 + errorKind: "invalid-input" | "not-found" | "ambiguous-edit" | "exec-error"
335 + | "timeout" | "permission-denied" | "internal";
336 + durationMs: number;
337 +}>;
338 +
339 +export type ToolCancelled = Durable<"tool.cancelled", {
340 + toolUseId: string;
341 + reason: "interrupted" | "resume-recovery" | "shutdown";
342 + modelText: string; // synthetic result, e.g. "[Tool execution cancelled by user]"
343 +}>;
344 +
345 +// ─────────────────────── file activity (durable) ───────────────────────
346 +
347 +export type FileRead = Durable<"file.read", {
348 + path: string; // relative to workspace cwd
349 + range?: { start: number; end: number };
350 + bytes: number;
351 + mtimeMs: number; // external-modification detection on later writes
352 + toolUseId: string;
353 +}>;
354 +
355 +export type FileModified = Durable<"file.modified", {
356 + path: string;
357 + operation: "write" | "edit";
358 + diffStats: DiffStats;
359 + diff?: string; // unified diff, capped (default 32 KiB) with truncation marker
360 + toolUseId: string;
361 +}>;
362 +
363 +// ─────────────────────── processes (durable + one ephemeral) ───────────────────────
364 +
365 +export type ProcessStarted = Durable<"process.started", {
366 + processId: string; // KHAELOR id (stable across PID reuse)
367 + pid: number;
368 + command: string;
369 + cwd: string;
370 + name?: string;
371 + toolUseId: string;
372 +}>;
373 +
374 +export type ProcessOutput = Ephemeral<"process.output", {
375 + processId: string;
376 + stream: "stdout" | "stderr";
377 + chunk: string;
378 +}>;
379 +
380 +export type ProcessExited = Durable<"process.exited", {
381 + processId: string;
382 + exitCode: number | null; // null = signal-killed
383 + cause: "exited" | "stopped-by-tool" | "khaelor-shutdown" | "crashed";
384 + durationMs: number;
385 +}>;
386 +
387 +// ─────────────────────── context engine (durable) ───────────────────────
388 +
389 +export type ContextPruned = Durable<"context.pruned", {
390 + toolUseIds: string[]; // results blanked with the FIXED placeholder string
391 + placeholder: string; // recorded so replay is byte-exact even if default changes
392 + tokensReclaimedEstimate: number;
393 +}>;
394 +
395 +export type ContextCompacted = Durable<"context.compacted", {
396 + checkpointYaml: string; // the structured checkpoint (ARCHITECTURE.md §6.4), verbatim
397 + cut: { fromSeq: number; toSeq: number }; // replaced range — pairing-safe boundary (§6.5)
398 + trigger: "proactive-token-budget" | "reactive-overflow" | "user-command";
399 + tokensBefore: number; // from real usage accounting
400 + summaryModel: string; // the auxModel used
401 +}>;
402 +
403 +// ─────────────────────── completion (durable) ───────────────────────
404 +
405 +export type VerificationRequested = Durable<"task.verification-requested", {
406 + attempt: 1 | 2;
407 + detectedChecks: string[]; // e.g. ["npm test", "npx tsc --noEmit"]
408 + withheldCandidateSeq: number; // seq of the withheld answer's final text block (ADR-12)
409 +}>;
410 +
411 +export type TaskCompleted = Durable<"task.completed", {
412 + evidence: CompletionEvidence;
413 +}>;
414 +
415 +export type TaskFailed = Durable<"task.failed", {
416 + reason: "model-fatal-error" | "iteration-budget-exhausted" | "user-abandoned";
417 + detail: string;
418 +}>;
419 +
420 +// ───────────────────────────── unions ─────────────────────────────
421 +
422 +export type DurableEvent =
423 + | SessionStarted | SessionResumed | SessionRenamed | ModelChanged | BaselineRecorded
424 + | UserMessageCreated | SteeringQueued | SteeringInjected | Interrupted
425 + | ModelRequestStarted | ModelTextBlockCompleted | ModelThinkingBlockCompleted
426 + | ToolRequested | ModelResponseCompleted | ModelRequestFailed
427 + | PermissionRequested | PermissionGranted | PermissionDenied
428 + | ToolApproved | ToolStarted | ToolCompleted | ToolFailed | ToolCancelled
429 + | FileRead | FileModified
430 + | ProcessStarted | ProcessExited
431 + | ContextPruned | ContextCompacted
432 + | VerificationRequested | TaskCompleted | TaskFailed;
433 +
434 +export type EphemeralEvent =
435 + | ModelTextDelta | ModelThinkingDelta | ToolCallStarted | ToolInputDelta
436 + | ToolOutput | ProcessOutput;
437 +
438 +export type KhaelorEvent = DurableEvent | EphemeralEvent;
439 +```
440 +
441 +Type-string convention: `domain.past-tense-fact` (`tool.completed`). The TypeScript alias names (PascalCase) match CLAUDE.md §7's vocabulary; the wire `type` strings are the namespaced forms above.
442 +
443 +---
444 +
445 +## 5. JSONL Serialization
446 +
447 +### 5.1 Format
448 +
449 +- One durable event per line: `JSON.stringify(envelope)` + `"\n"`. No pretty-printing, no BOM, UTF-8.
450 +- **Canonical JSON for byte-stability-sensitive payloads:** object keys serialized in a fixed order (envelope: `v,id,sessionId,seq,ts,type,payload`; payloads: schema field order). `ToolRequested.input` is stored via a canonical-JSON stringify so the LLM-history projection reproduces identical bytes on every rebuild (ADR-7).
451 +- Strings are stored verbatim (JSON escaping only). No compression in V1; logs are line-greppable by design.
452 +
453 +### 5.2 Append and atomicity rules
454 +
455 +1. The store holds one file descriptor per open session, opened with `O_APPEND`.
456 +2. Each event is written as **one `write()` call of one complete line** (single-writer process ⇒ a line is never interleaved).
457 +3. Appends are serialized through a per-session write queue; `seq` is assigned at enqueue and is gapless.
458 +4. **Write-ahead:** `publishDurable()` resolves the append (buffered write accepted by the OS) *before* the bus delivers the event to subscribers. Projections can therefore never observe an event the log doesn't contain.
459 +5. **Flush/fsync policy:** `fsync` at loop boundaries — after each tool result batch, after `ModelResponseCompleted`, after `ContextCompacted`, and on shutdown (mini's `finally` discipline, ADR-3). Between boundaries, OS buffering is accepted.
460 +6. The log is **never rewritten, truncated (except §5.3 recovery), or compacted in place**. `/clear` starts a new session file.
461 +7. `meta.json` sidecars are projection caches written atomically (tmp + rename) and are always rebuildable from the log — never a second source of truth (ADR-3 concern, accepted).
462 +
463 +### 5.3 Corruption recovery (truncated last line)
464 +
465 +A crash can leave at most one incomplete final line (consequence of rules 2–3). On `open()`:
466 +
467 +1. Read the file; if the last line lacks a trailing `\n` **or** fails `JSON.parse` **or** fails envelope validation, it is a torn write.
468 +2. Truncate the file to the end of the last valid line (atomic: `ftruncate` at the computed byte offset), after copying the torn bytes to `<session-id>.jsonl.torn` for diagnostics.
469 +3. Log a warning to `~/.khaelor/logs/`; never to the TUI.
470 +4. Corruption anywhere *other* than the final line indicates external interference: the session opens read-only for inspection and resume is refused with an actionable message (no silent repair of user data).
471 +5. After truncation, resume recovery runs (§6.5): dangling `tool_use` blocks are closed with `ToolCancelled{reason:"resume-recovery"}`.
472 +
473 +### 5.4 Versioning
474 +
475 +- Every line carries `v` (schema version), per-line — a log may legitimately contain mixed versions after an upgrade (ADR-3: version events from day one; never a v1/v2 dual architecture).
476 +- **Reads migrate, writes are current:** the store applies pure upgrade functions `migrate_v1_to_v2(line) → line` at read time; new events are always written at the current version. Log files are never rewritten in place.
477 +- Additive payload changes (new optional field) do **not** bump `v`; readers must tolerate unknown fields. Renames/semantic changes bump `v` and ship a migration.
478 +- Unknown `type` at read time (from a newer KHAELOR): the event is preserved and surfaced as an opaque timeline item; projections that don't recognize it skip it. Resume is refused only if an unknown event is *load-bearing* (declared via a `critical: true` envelope extension reserved for future use).
479 +
480 +---
481 +
482 +## 6. Projections
483 +
484 +All projections are folds: `state = events.reduce(apply, initial)`. The same reducer maintains live in-memory state (as events are published) and rebuilds on resume (as events are replayed) — one code path, two feeds (ADR-2/3). Each projection tolerates deletion of its cache and rebuilds from the log.
485 +
486 +### 6.1 Timeline (conversation state → TUI view-model)
487 +
488 +Fold rules:
489 +
490 +- `UserMessageCreated` → user message item. `SteeringQueued` → `Queued instruction` chip; `SteeringInjected` re-parents the chip to its injection point.
491 +- `ModelTextBlockCompleted` / `ModelThinkingBlockCompleted` → assistant text / collapsed thinking items, grouped per `requestId`.
492 +- `ToolRequested` → collapsed tool card (`▸ Read src/kernel/agent.ts`); `ToolStarted`/`ToolCompleted`/`ToolFailed`/`ToolCancelled` update its status/summary from `ui` metadata; `FileModified` attaches diff stats + expandable diff.
493 +- `PermissionRequested` without a matching `PermissionGranted/Denied` → active permission panel (this is how a pending approval survives restart).
494 +- `ProcessStarted`/`ProcessExited` → `/processes` list state.
495 +- `ContextCompacted` → subtle `— context compacted —` divider; checkpoint inspectable via `/context`.
496 +- `Interrupted` → turn marked interrupted. `TaskCompleted` → completion summary from `evidence`.
497 +- **Live streaming state is layered on top** by the coalescer (§7): ephemeral deltas mutate only the *live tail* of the view-model and are discarded once the corresponding durable settled event arrives.
498 +
499 +### 6.2 LlmHistory (Anthropic `messages[]`) — byte-stable
500 +
501 +The most invariant-critical projection. Fold rules, in `seq` order:
502 +
503 +1. `UserMessageCreated.text` → `{role:"user", content:[{type:"text", ...}]}`.
504 +2. Per `requestId`: `ModelThinkingBlockCompleted` (+signature), `ModelTextBlockCompleted`, and `ToolRequested` assemble into one `{role:"assistant"}` message, **ordered by `blockIndex`**.
505 +3. `ToolCompleted.modelText` / `ToolFailed.modelText` (is_error) / `ToolCancelled.modelText` → `tool_result` blocks in a `{role:"user"}` message, in the order the `tool_use` blocks appeared.
506 +4. `SteeringInjected` → the queued text is appended as an additional text block **inside the tool-result user message at `afterSeq`** (pre-model-call seam: appended to the last user message) — never a new bare user message mid-alternation (ADR-11).
507 +5. `ContextPruned` → for each listed `toolUseId`, the `tool_result` content is replaced by the recorded `placeholder` string. Deterministic: same event ⇒ same bytes, every rebuild.
508 +6. `ContextCompacted` → all messages derived from events with `cut.fromSeq ≤ seq ≤ cut.toSeq` are replaced by a single synthetic user message containing `checkpointYaml` (a fixed template wrapper). Multiple compactions apply in `seq` order; a later compaction may consume an earlier checkpoint message. Replay-deterministic by construction — the checkpoint text and cut range live in the event, not in engine code (ADR-6).
509 +7. `ModelChanged` marks a cache-lineage boundary (no message mutation).
510 +8. Volatile per-turn context (git status, process list, mention contents) is **not** in this projection — the Context Engine attaches it to the API copy of the current message only (ADR-7). LlmHistory is exactly the stable replayable prefix.
511 +
512 +**Byte-stability contract:** rebuilding LlmHistory from the log at any time yields byte-identical message content to what was previously sent (the ADR-7 test: serialize → compare).
513 +
514 +### 6.3 UsageTotals (cost counters)
515 +
516 +Fold: sum `ModelResponseCompleted.usage` fields, keyed by model id (main vs aux priced separately). Cost = tokens × configured pricing table. Incremental counters cached in `meta.json` are a pure cache (OpenCode's trick as projection, never truth — ADR-3). `/cost` and the status bar read this projection; if any usage field is absent, the display says so — nothing is estimated silently (Absolute Rule #4).
517 +
518 +### 6.4 FileChangeSet
519 +
520 +Fold: `BaselineRecorded` fixes the attribution baseline; `FileModified` accumulates `{path → {operations, cumulative diffStats, toolUseIds}}`; `FileRead.mtimeMs` feeds external-modification warnings. Consumers: `/diff`, the verification gate (`needsVerification`: code files changed since last `CheckResult` evidence, documentation-only filtered), and attribution (`khaelor` vs `preExisting` — ADR-15). A `ContextCompacted` never erases this projection — file changes remain first-class even when their conversational context is summarized.
521 +
522 +### 6.5 Pairing safety (tool_use / tool_result)
523 +
524 +**Invariant:** in LlmHistory, every `tool_use` block has exactly one `tool_result`, and the Anthropic role alternation is valid — at all times, including mid-crash and post-compaction.
525 +
526 +Enforcement, at three points:
527 +
528 +1. **Runtime (ADR-11):** interrupt closes every in-flight or pending `toolUseId` with `ToolCancelled` before the turn ends.
529 +2. **Resume recovery:** after replay (and §5.3 truncation), any `ToolRequested` lacking a terminal event (`ToolCompleted`/`ToolFailed`/`ToolCancelled`) gets a synthetic `ToolCancelled{reason:"resume-recovery"}` **appended durably at resume time** — recovery is itself an event, so the next replay needs no recovery.
530 +3. **Compaction cuts:** `ContextCompacted.cut.toSeq` may only land where every `tool_use` at `seq ≤ toSeq` has its `tool_result` at `seq ≤ toSeq` (OpenHands' `manipulation_indices` discipline, ADR-6). The Context Engine computes candidate cut points from the projection; the store validates the invariant before appending the event (violation = internal error, refused).
531 +
532 +---
533 +
534 +## 7. Delta Coalescing Contract (TUI, ~16 ms)
535 +
536 +The bus delivers ephemeral events synchronously; the TUI's `Coalescer` is the single buffering point (ADR-4, ADR-14).
537 +
538 +```ts
539 +export interface CoalescedFrame {
540 + textAppends: Map<BlockKey, string>; // concatenated ModelTextDelta / ModelThinkingDelta
541 + toolInputPreviews: Map<string, string>; // latest accumulated partial JSON per toolUseId
542 + toolOutputAppends: Map<string, string>; // concatenated ToolOutput per toolUseId
543 + processOutputAppends: Map<string, string>; // concatenated ProcessOutput per processId
544 + durables: DurableEvent[]; // durable events in this window, in seq order
545 +}
546 +export interface Coalescer {
547 + subscribe(onFrame: (f: CoalescedFrame) => void): Unsubscribe;
548 +}
549 +```
550 +
551 +Contract:
552 +
553 +1. **Flush cadence:** a frame is flushed at most once per ~16 ms window (timer armed on first buffered event; nothing buffered ⇒ no timer, no idle wake-ups). One render per frame regardless of event rate.
554 +2. **Coalescing is concatenation** for text-like deltas (order-preserving per block/tool/process key); consecutive deltas for the same key collapse into one string append.
555 +3. **Ordering with durables:** when a durable event arrives that *settles* a streaming key (e.g. `ModelTextBlockCompleted` for a block with buffered deltas), the coalescer **flushes immediately** — buffered deltas for that key are delivered in the same frame, *before* the durable event in `durables`. The TUI thus always sees deltas-then-settlement, never settlement-then-stale-deltas.
556 +4. **Settlement replaces:** on receiving the settled block, the TUI discards its accumulated delta string for that key and renders the durable content (byte-authoritative). Deltas are UX, never truth.
557 +5. **Backpressure/caps:** buffered append strings are capped per key per frame (default 16 KiB); overflow within a window truncates the *visual* preview with a marker — the durable settled event restores full fidelity. The live-render region caps (ADR-14) apply downstream.
558 +6. **Interrupt flushes:** `Interrupted` forces an immediate flush so the UI freezes at the last real state.
559 +
560 +---
561 +
562 +## 8. Event Bus API
563 +
564 +```ts
565 +// shared/bus.ts
566 +export interface EventBus {
567 + /** Append (write-ahead, §5.2) then publish. Assigns v/id/sessionId/seq/ts.
568 + * Returns the full envelope. Throws only on unrecoverable store failure
569 + * (disk full is classified and surfaced actionably). */
570 + publishDurable(input: DurableEventInput): DurableEvent;
571 +
572 + /** Fire-and-forget to live subscribers. Never persisted. */
573 + publishEphemeral(input: EphemeralEventInput): void;
574 +
575 + /** Typed subscription — handler parameter narrows by `type`. */
576 + on<T extends KhaelorEvent["type"]>(
577 + type: T,
578 + handler: (e: Extract<KhaelorEvent, { type: T }>) => void,
579 + ): Unsubscribe;
580 +
581 + /** Wildcard (projections, logging, coalescer). */
582 + onAny(handler: (e: KhaelorEvent) => void): Unsubscribe;
583 +}
584 +```
585 +
586 +Semantics and backpressure notes:
587 +
588 +- **In-process only** (ADR-17). The bus vocabulary is the system's only "API"; if the engine later moves to a `worker_thread`, this interface is what crosses the boundary.
589 +- **Synchronous fan-out, in `seq` order per session.** Handlers must be fast and non-throwing; a handler exception is caught, logged, and never blocks other subscribers or the kernel. Handlers needing async work schedule it — they do not make the bus async.
590 +- **No internal queues:** the coalescer (§7) is the only sanctioned buffering point; projection folds are O(small) per event by design. If a subscriber is measurably slow, fix the subscriber — not the bus (measure first, CLAUDE.md §18).
591 +- **Replay uses the same reducers, not the bus:** `SessionStore.open()` feeds replayed events directly to projection reducers; live subscribers (TUI, logging) receive only live events plus the rebuilt state handed to them at attach time. This keeps "replay" from re-triggering side effects.
592 +- Subscriptions return `Unsubscribe`; the TUI and kernel release all subscriptions on shutdown (leak check in tests).
593 +
594 +---
595 +
596 +## 9. Test Obligations (Phase 2–6 definition of done)
597 +
598 +1. **Round-trip:** every event type serializes → parses → deep-equals (property test over the union).
599 +2. **Byte-stability:** LlmHistory rebuilt from a log equals the recorded request bytes, including after `ContextPruned`/`ContextCompacted` and `SteeringInjected` (ADR-7).
600 +3. **Pairing invariant:** fuzzed interrupt/crash points never yield a dangling `tool_use` after resume recovery (§6.5).
601 +4. **Torn-write recovery:** truncating a log at every byte offset of the final line still opens cleanly (§5.3).
602 +5. **Coalescer:** delta storms produce ≤1 frame per 16 ms; settlement ordering (deltas before durable) holds under race.
603 +6. **Version tolerance:** unknown optional fields and unknown non-critical event types don't break replay (§5.4).
604 +
605 +---
606 +
607 +*Author: Simon-Pierre Boucher · contact@spboucher.ai*
added docs/PERMISSION_MODEL.md +426 −0
@@ -0,0 +1,426 @@
1 +<!--
2 +KHAELOR
3 +File: docs/PERMISSION_MODEL.md
4 +Author: Simon-Pierre Boucher
5 +Contact: contact@spboucher.ai
6 +-->
7 +
8 +# KHAELOR Permission Model — V1
9 +
10 +> Phase 1 design document. Binding inputs: CLAUDE.md §13 (Permission System), ADR-9 (permissions). Reference evidence: OPENCODE_ANALYSIS §8 (evaluator, arity suggestions, deny-shapes-tools), OPENHANDS_ANALYSIS §6 (persisted pending approvals, rejection-as-feedback), HERMES (hardline floor, "silence is not consent", operator guard).
11 +>
12 +> This document is the implementation contract for `src/permissions/`. Powerful but not annoying: the default policy keeps ordinary project work friction-free while keeping destructive or unusually broad actions visible (CLAUDE.md §13).
13 +
14 +---
15 +
16 +## 1. Capability taxonomy
17 +
18 +Permissions are evaluated against **capabilities**, never tool names (CLAUDE.md §13). V1 capabilities:
19 +
20 +| Capability | Meaning | Subject (the string patterns match against) |
21 +|---|---|---|
22 +| `file.read` | Read file/directory content or metadata inside or outside the project | resolved absolute path |
23 +| `file.write.project` | Create/modify/overwrite a file under the project root | resolved absolute path |
24 +| `file.write.outsideProject` | Create/modify a file outside the project root | resolved absolute path |
25 +| `process.execute` | Run a foreground shell command | the command text |
26 +| `process.background` | Start (or adopt) a long-lived background process | the command text |
27 +| `network.access` | Command whose primary purpose is network I/O (best-effort detection, §3.4) | the command text |
28 +| `git.modify` | Git command that mutates repository state (§3.4) | the command text |
29 +
30 +Notes:
31 +
32 +- The project root is `workspace.cwd()` resolved at session start. Path subjects are fully resolved (symlinks, `..`) **before** classification — a write to `./x/../../etc/hosts` is `file.write.outsideProject`.
33 +- One tool call may map to **multiple** capability requests (a `bash` call can carry `process.execute` + `network.access` + `git.modify`). Combination rule (§4.4): `deny` beats `ask` beats `allow`; every request must resolve `allow` for silent approval.
34 +- `filesystem.outsideProject` from CLAUDE.md §13 is realized as the `*.outsideProject` variants plus best-effort bash detection (§3.4); reads outside the project stay under `file.read` (pattern rules can still gate them, e.g. `file.read` on `/etc/*`).
35 +- Future capabilities (subagents, MCP, browser) extend this table; the rule format (§4) needs no change.
36 +
37 +### 1.1 `CapabilityRequest`
38 +
39 +Produced by each tool's `capabilities()` function (TOOL_PROTOCOL §1.2) before execution:
40 +
41 +```ts
42 +/**
43 + * KHAELOR
44 + * File: src/permissions/types.ts (excerpt — normative shape)
45 + */
46 +
47 +export type Capability =
48 + | "file.read"
49 + | "file.write.project"
50 + | "file.write.outsideProject"
51 + | "process.execute"
52 + | "process.background"
53 + | "network.access"
54 + | "git.modify";
55 +
56 +export interface CapabilityRequest {
57 + capability: Capability;
58 + /** What rules' patterns match against: resolved path or command text. */
59 + subject: string;
60 + /** Human-readable line for the panel, e.g. `Run npm install`. */
61 + display: string;
62 + /**
63 + * Candidate "always allow" patterns, most specific first
64 + * (e.g. ["git push *"]). EMPTY for compound/obfuscated commands (§3.3)
65 + * and for anything the analyzer could not classify — the panel then
66 + * offers exact-subject persistence only, or none.
67 + */
68 + alwaysPatterns: string[];
69 + /** Shown in the panel: why this asks, what is unusual. */
70 + riskNotes: string[];
71 + /** UI extras: diff for writes, parsed command parts, cwd. Never model-facing. */
72 + metadata?: Record<string, unknown>;
73 +}
74 +```
75 +
76 +---
77 +
78 +## 2. Per-tool capability mapping
79 +
80 +The mapping function of each tool (`capabilities(input, ctx)`), normative:
81 +
82 +| Tool | Mapping |
83 +|---|---|
84 +| `read` | `file.read` — subject: resolved `file_path`. |
85 +| `glob` | `file.read` — subject: resolved `path` (default cwd). |
86 +| `grep` | `file.read` — subject: resolved `path` (default cwd). |
87 +| `write` | Resolve `file_path` → under project root ? `file.write.project` : `file.write.outsideProject`. Metadata carries the unified diff (TOOL_PROTOCOL §3.2) so the panel shows what would change. |
88 +| `edit` | Identical to `write` (OpenCode folds `write` into `edit` policy-wise; KHAELOR folds both into the `file.write.*` capabilities). Metadata carries the diff. |
89 +| `bash` | `process.execute` (subject: full command text) **plus** derived requests from command analysis (§3): `network.access`, `git.modify`, `file.write.outsideProject` (filesystem verbs with resolved outside-project arguments — best-effort, ADR-9 concern). |
90 +| `process` | `action: "start"` → `process.background` (subject: command) plus the same derived analysis as `bash`. `list` / `read` → **no request** (pure observation of KHAELOR-owned state — read-only short-circuit, OpenHands §6). `write` → `process.background` with subject `stdin:<command of target process>` (sending input to a process the user already approved starting; default rule allows it when the start was allowed, §4.5). `stop` → no request (stopping our own process is always safe). |
91 +
92 +Anything not expressible above is a design error: a new behavior needs either a new capability or an ADR amendment — never a bypass.
93 +
94 +---
95 +
96 +## 3. Bash command analysis (V1: conservative shell-word parsing)
97 +
98 +Per ADR-9: **no tree-sitter in V1**; tree-sitter is the planned upgrade, not a maybe. V1 analysis must therefore be honest about its limits: it may *under-generalize* (fall back to exact-command approval) but must never *over-generalize* (suggest a broad "always allow" it cannot justify).
99 +
100 +### 3.1 Tokenization
101 +
102 +A small, dependency-free shell-word lexer:
103 +
104 +- Splits on whitespace; respects single quotes, double quotes, and backslash escapes.
105 +- Recognizes operator tokens: `&&` `||` `;` `|` `&` `>` `>>` `<` `<<` `2>` `2>&1` and newlines.
106 +- Flags **substitution markers** anywhere in the string: `$(`, backtick, `<(`, `>(`, `${`.
107 +- Produces: `{ words: string[][], operators: string[], hasSubstitution: boolean }` — one `words` list per simple command in the pipeline/chain.
108 +
109 +### 3.2 Classification
110 +
111 +```
112 +simple — exactly one command, no operators, no substitution
113 +compound — ≥2 commands (&&, ||, ;, |, &) — each simple part analyzed individually
114 +obfuscated— substitution present ($(), ``, ${}), OR quoted operator smuggling
115 + (an argument that itself lexes into operators for sh -c / bash -c /
116 + eval / xargs), OR lexer failure
117 +```
118 +
119 +- **simple:** full analysis — arity suggestions (§3.3), network/git detection (§3.4), outside-project path checks (§3.5).
120 +- **compound:** every part is analyzed; the derived capability set is the **union** over parts (one `curl` in a pipeline makes the whole command carry `network.access`). Evaluation may still auto-allow a compound command **only** if *every* part matches an `allow` rule and none matches `ask`/`deny` — otherwise one `ask` for the whole command.
121 +- **obfuscated:** derived analysis is skipped as unreliable; the command carries `process.execute` (+ `network.access` conservatively when net-tool names appear anywhere in the raw text) and always at least `ask` unless an **exact-subject** rule allows it. Risk note: `Command uses substitution — KHAELOR cannot verify what it will run.`
122 +
123 +### 3.3 "Always allow" suggestion generation — and the refusal rule
124 +
125 +**Refusal rule (Hermes' hardline-floor concept applied to suggestions):** `alwaysPatterns` is **empty** for any `compound` or `obfuscated` command. The panel then offers only "allow once" — never a persistable generalization for something the analyzer could not fully read. Exact-command persistence for compound commands is also refused in V1 (an exact string containing `&&` is still a standing grant for a multi-step effect; revisit with tree-sitter).
126 +
127 +For `simple` commands, suggestions come from an **arity dictionary** (OpenCode §8.2 — "the difference between a permission system users tolerate and one they like"): how many leading words form a meaningful prefix for common tools.
128 +
129 +```ts
130 +// src/permissions/arity.ts (excerpt) — prefix word-counts per tool
131 +const ARITY: Record<string, number | Record<string, number>> = {
132 + git: { "*": 2, config: 3, remote: 3, stash: 3, submodule: 3 },
133 + npm: { "*": 2, run: 3, exec: 3 },
134 + pnpm: { "*": 2, run: 3 }, yarn: { "*": 2, run: 3 },
135 + npx: 2, node: 2, python: 2, python3: 2, pip: 2, pip3: 2,
136 + cargo: 2, go: 2, make: 2, docker: { "*": 2, compose: 3 },
137 + kubectl: 2, gh: 3, brew: 2, ls: 1, cat: 1, mkdir: 1, touch: 1,
138 +};
139 +```
140 +
141 +Generation: take the first `arity` words of the command, append ` *` if arguments were elided. `git push origin main` → `git push *`; `npm run dev` → `npm run dev` (arity 3, exact); unknown command `./scripts/build.sh --prod` → arity default 1 → suggest `./scripts/build.sh *` **only if** the word resolves inside the project; otherwise exact command only. Panel copy: `[ A ] Always allow "git push *" in this project`.
142 +
143 +### 3.4 Network and git detection (simple commands)
144 +
145 +- `network.access` when the command word ∈ `{curl, wget, nc, ncat, netcat, ssh, scp, sftp, ftp, telnet, ping, dig, nslookup, rsync-with-remote-arg}`. Package managers (`npm install`, `pip install`, `cargo add`, `brew install`) stay `process.execute` — network is incidental and gating them separately would be pure annoyance; their arity suggestions handle policy. Documented as best-effort: this is a UX signal for the `ask` panel, **not** a security boundary (a denied `network.access` cannot stop a novel binary from opening a socket — see §7 honesty note).
146 +- `git.modify` when word 0 is `git` and word 1 ∈ `{commit, push, reset, rebase, merge, revert, cherry-pick, checkout, switch, restore, clean, stash, tag, branch(-d/-D/-m), remote(add/remove/set-url), am, apply, filter-branch, gc, reflog(delete/expire), config, rm, mv}`. Read-only git (`status, diff, log, show, blame, branch` listing, `ls-files`, `rev-parse`, `describe`, `fetch --dry-run`) remains plain `process.execute` and sits in the default allowlist (§4.5).
147 +
148 +### 3.5 Outside-project filesystem checks (best-effort — ADR-9 ⚠ concern)
149 +
150 +For simple commands whose word 0 is a filesystem verb (`rm, cp, mv, mkdir, rmdir, touch, chmod, chown, ln, dd, tee, truncate, install`), non-flag arguments are resolved against the effective cwd; any resolving outside the project root adds `file.write.outsideProject` with that path as subject. Explicitly best-effort on complex commands (recorded concern in ADR-9); the hardline floor (§4.2) backstops the worst cases, and tree-sitter is the planned upgrade.
151 +
152 +---
153 +
154 +## 4. Policy: rules, precedence, evaluation
155 +
156 +### 4.1 Rule format
157 +
158 +```ts
159 +export type PermissionAction = "allow" | "ask" | "deny";
160 +
161 +export interface PermissionRule {
162 + /** Capability pattern; wildcards allowed: "file.write.*", "*". */
163 + capability: string;
164 + /** Subject pattern; wildcards allowed: "git push *", "/Users/x/notes/*". Default "*". */
165 + pattern?: string;
166 + action: PermissionAction;
167 + /** Provenance, filled by the loader: "default" | "user" | "project" | "session". */
168 + source?: string;
169 +}
170 +```
171 +
172 +Wildcard matching: `*` matches any run of characters (including `/` in paths); matching is case-sensitive; a pattern without `*` must match the subject exactly. Command subjects are matched with collapsed whitespace.
173 +
174 +**Config file forms** (both accepted; CLAUDE.md §13 shows the shorthand):
175 +
176 +```jsonc
177 +// .khaelor/config.json — "permissions" section
178 +{
179 + "permissions": {
180 + // shorthand: capability → action
181 + "file.read": "allow",
182 + // nested: capability → { subject-pattern → action }, key order preserved
183 + "process.execute": {
184 + "git status": "allow",
185 + "git push *": "allow",
186 + "*": "ask"
187 + },
188 + // explicit ordered rules (appended after the shorthand expansion)
189 + "rules": [
190 + { "capability": "file.write.outsideProject", "pattern": "/Users/x/notes/*", "action": "allow" }
191 + ]
192 + }
193 +}
194 +```
195 +
196 +Normalization expands shorthand/nested forms into `PermissionRule[]` **in source key order** (the loader preserves JSON key order), then appends `rules`.
197 +
198 +### 4.2 Layering and the hardline floor
199 +
200 +The effective ruleset is plain array concatenation (OpenCode's `merge()`), later layers win by position:
201 +
202 +```
203 +DEFAULTS (built-in, §4.5)
204 + ++ user rules (~/.khaelor/config.json → permissions)
205 + ++ project rules (.khaelor/config.json → permissions)
206 + ++ session grants (in-memory "allow once" bookkeeping; "always" grants are
207 + written to the project file and re-loaded, §6)
208 +```
209 +
210 +**Beneath** the rule system sits the **hardline deny floor** (Hermes §6.5): a small, built-in, non-configurable pattern list that no rule can override. Checked against a *de-obfuscated* rendering of the command (quotes stripped, whitespace collapsed, `$HOME`/`~` expanded):
211 +
212 +```
213 +rm -rf / rm -rf /* rm -rf ~ rm -rf $HOME
214 +mkfs* dd * of=/dev/* chmod -R 777 / chown -R * /
215 +:(){ :|:& };: shutdown* reboot* halt*
216 +git push * --force * (to a branch matching main|master, when detectable)
217 +> /dev/sd*
218 +```
219 +
220 +Hardline hits return `deny` with `riskNotes: ["Blocked by KHAELOR's built-in safety floor — this cannot be allowed by configuration."]`. The list ships short and explicit; growing it requires an ADR note. It is a floor against catastrophe, not the primary defense (Hermes' regex-armory posture is rejected — HERMES NOT-COPY #9).
221 +
222 +### 4.3 Evaluation algorithm — last match wins
223 +
224 +The OpenCode-style ~4-line evaluator, exactly:
225 +
226 +```ts
227 +export function evaluate(rules: PermissionRule[], req: CapabilityRequest): Decision {
228 + if (HARDLINE.some((h) => matchHardline(h, req))) return { action: "deny", rule: HARDLINE_RULE };
229 + const rule = rules.findLast(
230 + (r) => wildcard(r.capability, req.capability) && wildcard(r.pattern ?? "*", req.subject),
231 + );
232 + return { action: rule?.action ?? "ask", rule }; // unmatched default: ask
233 +}
234 +```
235 +
236 +Properties (all tested): last matching rule wins; both fields must match; users control precedence purely by rule order within a file and by file layer; the fallback for a capability no rule mentions is `ask` (safe default — though the shipped defaults §4.5 mention every V1 capability). `Decision` carries the matched rule + `source` for provenance display and audit (§8).
237 +
238 +### 4.4 Combining multiple requests per tool call
239 +
240 +A tool call producing requests `R1..Rn` is decided as:
241 +
242 +```
243 +any deny → deny (the denied request named in the failure message)
244 +else any ask → ask (ONE combined panel listing all asking requests)
245 +else → allow
246 +```
247 +
248 +For compound bash commands, §3.2's per-part union feeds this the same way. One tool call never produces more than one panel.
249 +
250 +### 4.5 Default policy shipped with V1
251 +
252 +Safe but not annoying (CLAUDE.md §13; defaults calibrated against OpenCode's — OPENCODE §8.1):
253 +
254 +```ts
255 +export const DEFAULT_RULES: PermissionRule[] = [
256 + // reads: free, except secrets-shaped files
257 + { capability: "file.read", pattern: "*", action: "allow" },
258 + { capability: "file.read", pattern: "*.env", action: "ask" },
259 + { capability: "file.read", pattern: "*.env.*", action: "ask" },
260 + { capability: "file.read", pattern: "*.env.example", action: "allow" },
261 + { capability: "file.read", pattern: "*.pem", action: "ask" },
262 + { capability: "file.read", pattern: "*/.ssh/*", action: "ask" },
263 +
264 + // writes: project free, outside asks
265 + { capability: "file.write.project", pattern: "*", action: "allow" },
266 + { capability: "file.write.outsideProject", pattern: "*", action: "ask" },
267 +
268 + // commands: ask by default, with a read-only allowlist so common
269 + // inspection never prompts (the arity suggester grows this per project)
270 + { capability: "process.execute", pattern: "*", action: "ask" },
271 + { capability: "process.execute", pattern: "git status*", action: "allow" },
272 + { capability: "process.execute", pattern: "git diff*", action: "allow" },
273 + { capability: "process.execute", pattern: "git log*", action: "allow" },
274 + { capability: "process.execute", pattern: "git show*", action: "allow" },
275 + { capability: "process.execute", pattern: "git branch", action: "allow" },
276 + { capability: "process.execute", pattern: "ls*", action: "allow" },
277 + { capability: "process.execute", pattern: "pwd", action: "allow" },
278 + { capability: "process.execute", pattern: "which *", action: "allow" },
279 + { capability: "process.execute", pattern: "cat *", action: "allow" },
280 + { capability: "process.execute", pattern: "wc *", action: "allow" },
281 + { capability: "process.execute", pattern: "head *", action: "allow" },
282 + { capability: "process.execute", pattern: "tail *", action: "allow" },
283 +
284 + // stdin to an already-approved background process: allowed
285 + { capability: "process.background", pattern: "stdin:*", action: "allow" },
286 + { capability: "process.background", pattern: "*", action: "ask" },
287 +
288 + { capability: "network.access", pattern: "*", action: "ask" },
289 + { capability: "git.modify", pattern: "*", action: "ask" },
290 +];
291 +```
292 +
293 +The allowlisted read-only commands still pass through §3 analysis — `cat * > file` is compound and asks. First-run UX teaches the loop once: approve `npm test` with `A` and it never asks again *in this project*.
294 +
295 +---
296 +
297 +## 5. The permission request flow
298 +
299 +### 5.1 Event flow (all durable — ADR-4, audit §8)
300 +
301 +```
302 +Executor decodes tool_use
303 + → emit ToolRequested{callId, tool, input, requests: CapabilityRequest[]}
304 + → decision = combine(evaluate(rules, r) for r in requests) (§4.3–4.4)
305 +
306 + allow → emit ToolApproved{callId, decisions} → execute()
307 + ask → emit PermissionRequested{callId, requests, decisions}
308 + → TUI panel (§6)
309 + → user grants → emit PermissionGranted{callId, scope: "once"|"always",
310 + persistedRule?} → ToolApproved → execute()
311 + → user denies → emit PermissionDenied{callId, feedback?}
312 + → ToolFailed (model-facing message, §5.4)
313 + deny → emit PermissionDenied{callId, byRule} → ToolFailed (§5.4) (no panel)
314 +```
315 +
316 +### 5.2 Concurrency and timeout semantics
317 +
318 +- The agent turn parks on a pending request (`Deferred`, OpenCode §8.3). Parallel tool calls queue their panels; **granting "always" auto-resolves other pending requests that now evaluate to `allow`; denying one denies all pending requests of the same turn** (OpenCode behavior, adopted).
319 +- **Silence is not consent** (Hermes): there is no auto-approval timeout. A pending request idles until answered; the status line shows `● Waiting for permission`. Because `PermissionRequested` is durable and the approval is just the granted event, a pending approval **survives restart** (OpenHands' persisted-unexecuted-action trick): on resume, the panel reappears.
320 +- Non-interactive invocations (future `khaelor run`) resolve every `ask` as `deny` with message `KHAELOR is running non-interactively; interactive approval is unavailable.`
321 +
322 +### 5.3 Escalation inside execution
323 +
324 +`bash`'s timeout-redirect (TOOL_PROTOCOL §7.2) turns a foreground command into a background process. No second prompt: the original `process.execute` grant covers the adoption; the adoption is announced in the result and the process appears in `/processes`. (Rationale: the user approved *this command*; whether it takes 90 s or 900 s does not change what it does.)
325 +
326 +### 5.4 Denial is steering, not a dead end (ADR-9)
327 +
328 +Model-facing `ToolFailed` content:
329 +
330 +- **Policy deny:** `Permission denied by policy: process.execute for "rm -rf build" is denied in this project (rule: process.execute / "rm -rf *", source: project). Do not retry this command or attempt an equivalent workaround. Choose a different approach, or ask the user to adjust permissions.`
331 +- **User deny, no feedback:** `The user declined to allow: npm install. Continue without it, or propose an alternative.`
332 +- **User deny with feedback** (§6 panel offers an optional one-line reason): `The user declined to allow: npm install — reason: "use pnpm in this repo". Adapt your approach accordingly.` (OpenCode's `CorrectedError` — rejection becomes course correction.)
333 +
334 +---
335 +
336 +## 6. TUI panel and persistence
337 +
338 +### 6.1 Panel (CLAUDE.md §13 — inline, milliseconds, keyboard-native)
339 +
340 +```
341 +╭─ KHAELOR requests permission ─────────────────────────────╮
342 +│ Run process.execute │
343 +│ npm install │
344 +│ │
345 +│ Working directory │
346 +│ ~/dev/project │
347 +│ │
348 +│ ⚠ Installs packages (writes node_modules, lockfile) │
349 +│ │
350 +│ [ Enter ] Allow once │
351 +│ [ A ] Always allow "npm install *" in this project │
352 +│ [ Esc ] Deny [ Tab ] Details │
353 +╰───────────────────────────────────────────────────────────╯
354 +```
355 +
356 +Contents, top to bottom: **verb + capability badge** (right-aligned; `Run`/`Write`/`Edit`/`Start process`/`Read`); the **subject** (command text, or path); **working directory**; **risk notes** from `CapabilityRequest.riskNotes` (compound-command warning, outside-project path, hardline-adjacent notes) — only when present; keys.
357 +
358 +- **Metadata-driven bodies** (OpenCode §8.3): `write`/`edit` requests render the actual unified diff (scrollable within the panel); bash shows the command with operator tokens visually marked for compound commands; `process start` notes "keeps running in the background".
359 +- `[ A ]` appears **only when `alwaysPatterns` is non-empty** (§3.3 refusal rule) and shows the exact pattern it will persist. Multiple candidate patterns → `A` cycles specificity (`npm run dev` ↔ `npm run *`), current choice always visible.
360 +- `[ Tab ]` expands details: every capability request in the combined decision, the matched rule + source for each, resolved absolute paths.
361 +- `[ Esc ]` denies immediately; the panel then offers a single optional line: `Reason (Enter to skip): _` — feeding §5.4.
362 +- Never a bare `Allow? y/n`. The composer is disabled while a panel is open; the panel is fully keyboard-driven and monochrome-safe (symbols, not color alone — CLAUDE.md §19).
363 +
364 +### 6.2 Persistence of "always allow" (fixing OpenCode's flaw — ADR-9)
365 +
366 +`A` appends, immediately and atomically, to the **project** config:
367 +
368 +```jsonc
369 +// .khaelor/config.json (created if missing)
370 +{
371 + "permissions": {
372 + "rules": [
373 + { "capability": "process.execute", "pattern": "npm install *", "action": "allow" }
374 + // appended entries keep chronological order → last-match-wins keeps newest decision authoritative
375 + ]
376 + }
377 +}
378 +```
379 +
380 +- Written via read-modify-write with comment/key-order preservation and an atomic rename; a malformed config file fails the write loudly (the grant still applies in-memory for the session; the user is told the file could not be updated).
381 +- Grants survive restarts by construction — they are ordinary rules on the next load (OpenCode v1's in-memory-only `always` is the named flaw this fixes).
382 +- **User-level rules** live in `~/.khaelor/config.json` with identical syntax; users edit them by hand or via `/permissions`. The panel itself only writes project scope in V1 (a per-user grant from a transient prompt is too broad a default; `/permissions` offers promotion).
383 +- Precedence recap (§4.2): defaults < user < project < session — project grants therefore override user-level `ask`s, and either can be overridden by a later project `deny`.
384 +- `/permissions` lists effective rules with source + match provenance, supports delete/reorder, and is the audit-friendly mirror of the config files.
385 +
386 +---
387 +
388 +## 7. Safety invariants
389 +
390 +1. **No bypass path.** Tools execute only via the Executor, which requires a recorded `ToolApproved` for the exact `callId`. `ToolDefinition.execute` is not reachable otherwise; tools cannot spawn processes or touch files except through `Workspace`/`ProcessManager` (ADR-13 lint guard), which are handed out only inside approved execution contexts.
391 +2. **Deny shapes the tool list** (OpenCode §8.3 `Permission.disabled`). If a capability that is a tool's *sole* possible mapping is denied for `*` (e.g. `file.write.*: deny`), the registry removes `write`/`edit` from the tools array sent to the model (`ToolRegistry.available(policy)`, TOOL_PROTOCOL §1.2) — the model never wastes a turn requesting the impossible. Partial denies (pattern-scoped) keep the tool visible.
392 +3. **Hardline floor is unbypassable** — checked before rules, immune to config, matched on de-obfuscated text (§4.2).
393 +4. **Fail closed.** Analyzer errors, lexer failures, unresolvable paths → treat as `obfuscated`/unknown → at least `ask`, never silent `allow` (OpenHands: analysis errors default HIGH).
394 +5. **Deterministic rules are primary.** No LLM self-assessed risk as a gate in V1 (OpenHands NOT-COPY #10); risk notes are analyzer-derived facts.
395 +6. **Honesty note (recorded limitation).** V1 permission enforcement gates *what the agent asks to do*, not what a running binary does — `network.access` detection is a UX signal, not an egress firewall, and §3.5's outside-project detection is best-effort on complex commands (ADR-9 ⚠). The mitigations are the operator-refusal rule, the `ask` defaults, and the hardline floor; the structural upgrade is tree-sitter parsing (planned, post-V1).
396 +7. **Session grants never outlive their scope.** "Allow once" covers exactly one `callId`. Nothing is silently widened.
397 +
398 +---
399 +
400 +## 8. Audit trail
401 +
402 +All of `ToolRequested`, `ToolApproved`, `PermissionRequested`, `PermissionGranted`, `PermissionDenied`, `ToolFailed` are **durable** events in the session JSONL (ADR-3/ADR-4), each carrying: `callId`, the capability requests, the matched rule and its `source`, scope of grants (`once`/`always` + persisted pattern), and denial feedback. Consequences:
403 +
404 +- `/permissions` and session replay can reconstruct *why* any action ran: which rule, from which file, granted by whom.
405 +- Pending approvals survive restart (§5.2) because the request is in the log and the grant is absent.
406 +- The event log is the compliance story: no permission decision is ever in-memory-only, even though "once" grants are never written to config.
407 +
408 +---
409 +
410 +## 9. Conformance checklist (tests to ship with `src/permissions/`)
411 +
412 +- [ ] Evaluator: last-match-wins, wildcard on both fields, unmatched → ask; property tests over rule orderings.
413 +- [ ] Layer concatenation: defaults < user < project < session; shorthand/nested/rules normalization preserves source order.
414 +- [ ] Hardline floor: fires on de-obfuscated variants (`rm -rf "/"`, `rm -rf $HOME`); unoverridable by allow rules.
415 +- [ ] Lexer: quotes, escapes, operators, substitution flags; golden classification table (simple/compound/obfuscated).
416 +- [ ] Suggestion generation: arity table goldens; **no `alwaysPatterns` for any compound/obfuscated command**.
417 +- [ ] Per-tool mapping goldens, incl. path resolution tricks (`../`, symlinks) flipping project ↔ outsideProject.
418 +- [ ] Combination rule: deny > ask > allow across multi-request calls; one panel per call.
419 +- [ ] Persistence: `A` writes the exact rule to `.khaelor/config.json` atomically; reload honors it; malformed config fails loudly with in-memory fallback.
420 +- [ ] Deny-shapes-tools: `file.write.*: deny` removes write/edit from the Anthropic tools array.
421 +- [ ] Denial feedback reaches the model verbatim; audit events durable and replayable.
422 +- [ ] Restart with pending `PermissionRequested` re-presents the panel.
423 +
424 +---
425 +
426 +*Author: Simon-Pierre Boucher · contact@spboucher.ai*
added docs/TOOL_PROTOCOL.md +735 −0
@@ -0,0 +1,735 @@
1 +<!--
2 +KHAELOR
3 +File: docs/TOOL_PROTOCOL.md
4 +Author: Simon-Pierre Boucher
5 +Contact: contact@spboucher.ai
6 +-->
7 +
8 +# KHAELOR Tool Protocol — V1
9 +
10 +> Phase 1 design document. Binding inputs: CLAUDE.md §10 (V1 Tools), §9 (Workspace), ADR-8 (tools), ADR-13 (workspace). Reference evidence: OPENCODE_ANALYSIS §6, OPENHANDS_ANALYSIS §4.
11 +>
12 +> This document is the implementation contract for `src/tools/`. Every schema, output format, error message shape, and truncation constant here is normative. Deviations require an ADR amendment.
13 +
14 +---
15 +
16 +## 0. Design rules (from ADR-8)
17 +
18 +1. **Exactly seven tools:** `read` · `write` · `edit` · `grep` · `glob` · `bash` · `process`. No `git` tool in V1 — git flows through `bash` under permission rules.
19 +2. **≤5 parameters per tool.** Guidance lives in description text, never in parameter complexity (OpenCode §6.1).
20 +3. **Rich outputs, bounded size.** Every tool that can produce large output truncates head/tail with explicit omission markers and spills the full output to a file path the model can `read`/`grep` (convergent: Hermes §6.3, OpenCode §6.1, OpenHands §4.3).
21 +4. **OpenHands-quality failures.** Errors are actionable repair prose: line numbers of near-misses, "Maybe you meant …?" hints, post-edit snippets for self-verification. An error message is written for the model to *recover from*, never merely to report.
22 +5. **Tools never touch Node globals.** All file and process I/O goes through `Workspace` and services injected via `ToolContext` (ADR-13). A lint guard flags `node:fs`/`node:child_process` imports outside `src/workspace/` and approved shared modules.
23 +6. **Rendering lives in the TUI**, keyed by tool name + metadata — never on the tool or the event (OpenHands' `visualize` wart, OPENHANDS §5). This document specifies the rendering *contract* (what metadata each tool guarantees); `src/tui/tool-view/` implements it.
24 +
25 +Parameter naming is `snake_case` throughout (matches Anthropic tool-use conventions and the model's training distribution).
26 +
27 +---
28 +
29 +## 1. Shared infrastructure
30 +
31 +### 1.1 `ToolResult` envelope
32 +
33 +The envelope strictly separates **model-facing content** (the exact string placed in the `tool_result` block) from **UI-facing metadata** (diffs, counts, durations — never sent to the model, always available to the TUI and the event log).
34 +
35 +```ts
36 +/**
37 + * KHAELOR
38 + * File: src/tools/types.ts (excerpt — normative shape)
39 + */
40 +
41 +export interface ToolResult {
42 + /** Exact text the model receives as tool_result content. */
43 + content: string;
44 + /** True → tool_result carries is_error: true. The content must be repair prose. */
45 + isError?: boolean;
46 + /** UI/log-facing. Never serialized into model context. */
47 + metadata?: ToolResultMetadata;
48 +}
49 +
50 +export interface ToolResultMetadata {
51 + /** Collapsed one-liner shown in the conversation (see per-tool rendering contracts). */
52 + title: string;
53 + /** Unified diff for write/edit — powers instant `d` expansion and /diff. */
54 + diff?: string;
55 + additions?: number;
56 + deletions?: number;
57 + /** grep/glob counts. */
58 + matches?: number;
59 + files?: number;
60 + /** bash/process. */
61 + exitCode?: number | null;
62 + processId?: string;
63 + durationMs: number;
64 + truncation?: TruncationInfo;
65 + /** Free-form extras streamed during execution via ctx.progress(). */
66 + extra?: Record<string, unknown>;
67 +}
68 +
69 +export interface TruncationInfo {
70 + originalBytes: number;
71 + originalLines: number;
72 + shownHeadLines: number;
73 + shownTailLines: number;
74 + omittedLines: number;
75 + /** Absolute path to the full output, if spilled. */
76 + spillPath?: string;
77 +}
78 +```
79 +
80 +### 1.2 `ToolDefinition` and the registry
81 +
82 +```ts
83 +/**
84 + * KHAELOR
85 + * File: src/tools/registry.ts (excerpt — normative shape)
86 + */
87 +import type { z } from "zod";
88 +
89 +export type ToolName =
90 + | "read" | "write" | "edit" | "grep" | "glob" | "bash" | "process";
91 +
92 +export interface ToolDefinition<P = unknown> {
93 + readonly name: ToolName;
94 + /** Model-facing description — the exact text sent in the tools array. */
95 + readonly description: string;
96 + /** Zod schema is the source of truth; the Anthropic input_schema is derived from it. */
97 + readonly schema: z.ZodType<P>;
98 + /**
99 + * Maps a decoded input to the capability requests the permission system
100 + * evaluates BEFORE execute() is called. Pure function; no I/O beyond path
101 + * resolution against ctx.workspace.cwd(). See docs/PERMISSION_MODEL.md §2.
102 + */
103 + capabilities(input: P, ctx: ToolContext): CapabilityRequest[];
104 + /** Runs only after ToolApproved. Must respect ctx.signal. */
105 + execute(input: P, ctx: ToolContext): Promise<ToolResult>;
106 +}
107 +
108 +export interface ToolContext {
109 + readonly sessionId: string;
110 + readonly callId: string; // Anthropic tool_use id
111 + readonly workspace: Workspace; // ADR-13 — the ONLY file/exec seam
112 + readonly signal: AbortSignal; // cancellation tree (ADR-11)
113 + readonly fileTimes: FileTimeRegistry; // §1.4
114 + readonly processes: ProcessManager; // §8
115 + /** Emit durable domain events (FileRead, FileModified, ProcessStarted, …). */
116 + emit(event: KhaelorEvent): void;
117 + /** Stream UI-facing progress metadata mid-execution (ephemeral events). */
118 + progress(meta: Record<string, unknown>): void;
119 + /** Spill oversized output; returns the absolute path (§1.3). */
120 + spill(label: string, content: string): Promise<string>;
121 +}
122 +
123 +export class ToolRegistry {
124 + register(tool: ToolDefinition): void;
125 + /** Tools visible to the model this turn. Deny-rules hide tools (PERMISSION_MODEL §7). */
126 + available(policy: PermissionPolicy): ToolDefinition[];
127 + get(name: string): ToolDefinition | undefined;
128 + /** [{name, description, input_schema}] for the Anthropic request. */
129 + toAnthropicTools(policy: PermissionPolicy): AnthropicToolParam[];
130 +}
131 +```
132 +
133 +**Execution pipeline** (owned by the Executor, not by tools):
134 +
135 +```
136 +tool_use block
137 + → schema.safeParse(input)
138 + ✗ → ToolResult{isError, content: repair prose} (never throws to kernel)
139 + → tool.capabilities(input, ctx)
140 + → permission evaluation (ToolRequested → …) (PERMISSION_MODEL §5)
141 + → emit ToolStarted
142 + → tool.execute(input, ctx) (AbortSignal-aware)
143 + → truncate/spill enforcement (defense in depth, §1.3)
144 + → emit ToolCompleted | ToolFailed (durable, carries ToolResult)
145 +```
146 +
147 +Schema-decode failures produce model-facing repair prose, OpenCode-style:
148 +`Invalid input for tool "edit": parameter "old_string" is required. Please rewrite the input so it satisfies the expected schema.`
149 +
150 +Cancellation (ADR-11): an aborted tool resolves to a synthetic result `[Tool execution cancelled by user]` with `isError: true`, keeping the `tool_use`/`tool_result` pairing protocol-valid. Cancelling the turn does **not** stop `process`-managed background processes.
151 +
152 +### 1.3 Truncation and spill (global rules)
153 +
154 +- Spill directory: `~/.khaelor/tool-output/<session-id>/` — files named `<tool>-<callId>.txt`. Session-scoped, garbage-collected with the session, global size cap 512 MB (oldest sessions pruned first).
155 +- Truncation is **middle-out**: keep head + tail, insert one explicit marker line:
156 + `[... 1,842 lines omitted (58 KB). Full output: /Users/x/.khaelor/tool-output/s_ab12/bash-toolu_9.txt — read or grep that file for the rest.]`
157 +- Per-tool limits are defined in each tool's section. The Executor enforces a hard backstop (64 KB model-facing content per result) even if a tool misbehaves.
158 +- Truncation is always reported in `metadata.truncation` so the TUI can show `· truncated` and offer full-output expansion from the spill file.
159 +
160 +### 1.4 `FileTimeRegistry` — read-before-write and external-modification detection
161 +
162 +Session-scoped record of every file the agent has read or written:
163 +
164 +```ts
165 +export interface FileStamp {
166 + path: string; // absolute, resolved
167 + mtimeMs: number;
168 + size: number;
169 + sha256: string; // of content as read/written
170 + at: number; // event timestamp
171 +}
172 +
173 +export interface FileTimeRegistry {
174 + stamp(path: string, content: string): void; // called by read/write/edit on success
175 + get(path: string): FileStamp | undefined;
176 + /** "unread" | "clean" | "externally-modified" */
177 + check(path: string, currentContent: string): FileFreshness;
178 +}
179 +```
180 +
181 +Rules enforced by `write` and `edit` (§3, §4): existing files must have been read this session before modification, and must not have changed externally since. This protects user work (Absolute Rule #5) and is rebuilt on resume by replaying `FileRead`/`FileModified` events.
182 +
183 +---
184 +
185 +## 2. `read`
186 +
187 +### 2.1 Schema
188 +
189 +```json
190 +{
191 + "name": "read",
192 + "description": "Read a file from the workspace. Returns the file content with line numbers, in the format 'LINE_NUMBER→CONTENT'. By default reads up to 2000 lines from the beginning. For larger files, use offset and limit to page through content — the output tells you the total line count and how to continue. Prefer reading only the region you need on large files. Binary files are detected and described instead of dumped. If the path is a directory, its entries are listed. File paths must be absolute or relative to the working directory.",
193 + "input_schema": {
194 + "type": "object",
195 + "properties": {
196 + "file_path": {
197 + "type": "string",
198 + "description": "Path to the file to read (absolute preferred)."
199 + },
200 + "offset": {
201 + "type": "integer",
202 + "description": "1-based line number to start reading from. Omit to start at line 1."
203 + },
204 + "limit": {
205 + "type": "integer",
206 + "description": "Maximum number of lines to return. Omit for the default of 2000."
207 + }
208 + },
209 + "required": ["file_path"]
210 + }
211 +}
212 +```
213 +
214 +### 2.2 Execution semantics
215 +
216 +1. Resolve path against `workspace.cwd()`. Relative paths are accepted but the resolved absolute path is echoed in output.
217 +2. Guards, in order: existence (with near-miss suggestion, below) → directory (list entries, 2 levels, hidden-file counts) → size (files > 10 MB refuse with guidance to use `grep` or `offset`/`limit`) → binary sniff (extension list + non-printable ratio over a 4 KB sample; binary files return a one-line description: type, size — never bytes).
218 +3. Read lines `[offset, offset+limit)`; default `limit` 2000; per-line truncation at 2000 chars (marker `… [line truncated]`); byte cap 50 KB per result — whichever limit hits first ends the page.
219 +4. On success: `ctx.fileTimes.stamp(path, content)`; `emit(FileRead{path, lines})`.
220 +
221 +### 2.3 Success output (model-facing)
222 +
223 +```
224 +/Users/x/dev/proj/src/kernel/agent.ts
225 + 1→/**
226 + 2→ * KHAELOR
227 + 3→ * File: src/kernel/agent.ts
228 + ...
229 + 2000→}
230 +(Showing lines 1–2000 of 3417. Use offset=2001 to continue.)
231 +```
232 +
233 +Line numbers are right-aligned, `→`-separated (stable format the model can quote back to `edit`).
234 +
235 +### 2.4 Errors
236 +
237 +- **Not found (with near-miss):**
238 + `File not found: /Users/x/dev/proj/src/kernal/agent.ts. Did you mean one of these? src/kernel/agent.ts, src/kernel/agent.test.ts` (up to 3 suggestions by name similarity within the repository index).
239 +- **Relative-path confusion:** if a relative path fails but resolving it against `cwd` succeeds, the miss message says `Maybe you meant /Users/x/dev/proj/src/kernel/agent.ts?` (OpenHands §4.2 pattern).
240 +- **Offset beyond EOF:** `Offset 5000 is beyond the end of the file (3417 lines). Use offset ≤ 3417.`
241 +- **Too large / binary:** stated with size and the concrete alternative (`grep` for content search, `offset`/`limit` for regions).
242 +
243 +### 2.5 Rendering contract
244 +
245 +- Collapsed: `▸ Read src/kernel/agent.ts · lines 1–2000 of 3417`
246 +- Expanded: syntax-highlighted excerpt (first/last N lines of what the model saw), path header, truncation badge. Metadata guaranteed: `title`, `extra.path`, `extra.lines`, `extra.totalLines`.
247 +
248 +---
249 +
250 +## 3. `write`
251 +
252 +### 3.1 Schema
253 +
254 +```json
255 +{
256 + "name": "write",
257 + "description": "Write a complete file to the workspace, creating it (and parent directories) if needed, or fully replacing its content if it exists. To modify part of an existing file, use the edit tool instead — write replaces the whole file. You must have read an existing file with the read tool during this session before overwriting it; if the file changed on disk since you read it, the write is refused and you must re-read first. New source files in this project must begin with the mandatory KHAELOR author header (Author: Simon-Pierre Boucher, Contact: contact@spboucher.ai, File, Description).",
258 + "input_schema": {
259 + "type": "object",
260 + "properties": {
261 + "file_path": {
262 + "type": "string",
263 + "description": "Path of the file to write (absolute preferred)."
264 + },
265 + "content": {
266 + "type": "string",
267 + "description": "The complete new content of the file."
268 + }
269 + },
270 + "required": ["file_path"]
271 + }
272 +}
273 +```
274 +
275 +`content` is required in implementation (`required: ["file_path", "content"]` — listed here for clarity; the Zod schema marks both required).
276 +
277 +### 3.2 Execution semantics — overwrite protection
278 +
279 +For an **existing** file, in order:
280 +
281 +1. `fileTimes.get(path)` absent → refuse: read-before-write violation (error below).
282 +2. Read current disk content; `fileTimes.check(path, current) === "externally-modified"` → refuse (error below). This catches the user (or another process) editing the file since the agent last saw it (Absolute Rule #5).
283 +3. Compute unified diff old→new for `metadata.diff` and the permission request (PERMISSION_MODEL §6 shows the diff in the panel).
284 +
285 +For a **new** file: parent directories created; diff is against empty.
286 +
287 +Write mechanics (shared with `edit`): preserve existing line endings (CRLF detection) and BOM; atomic write — temp file in the same directory, `fsync`, `rename`, original mode bits preserved. On success: `fileTimes.stamp`, `emit(FileModified{path, additions, deletions, created})`.
288 +
289 +**Mandatory header reminder (Absolute Rule #0).** If the file is *new*, inside the project, with an extension in the header-required set (`.ts .tsx .js .mjs .cjs .sh .rs .md` per CLAUDE.md §2), and the content does not begin with the KHAELOR author header, the write **succeeds** but the result appends:
290 +
291 +```
292 +NOTE: This new source file is missing the mandatory KHAELOR author header
293 +(Author: Simon-Pierre Boucher · Contact: contact@spboucher.ai · File · Description).
294 +Add it now — the header lint check fails the build without it.
295 +```
296 +
297 +The hard gate is `scripts/check-headers` in CI; the tool-level reminder keeps the agent self-correcting in the same turn.
298 +
299 +### 3.3 Success output (model-facing)
300 +
301 +```
302 +Wrote /Users/x/dev/proj/src/context/budget.ts (114 lines).
303 +```
304 +or for overwrite: `Replaced /Users/x/dev/proj/src/context/budget.ts (was 90 lines, now 114 lines).` — plus the header note when applicable.
305 +
306 +### 3.4 Errors
307 +
308 +- **Read-before-write:** `Refusing to overwrite /…/engine.ts: you have not read this file in this session. Read it first so you do not destroy existing content, then write or edit it.`
309 +- **External modification:** `Refusing to overwrite /…/engine.ts: the file changed on disk after you last read it (content hash mismatch). Someone else may be editing it. Re-read the file and reapply your change.`
310 +- **Path is a directory / permission / disk errors:** stated with the failing path and one concrete next step.
311 +
312 +### 3.5 Rendering contract
313 +
314 +- Collapsed (new): `▸ Write src/context/budget.ts · new file · 114 lines`
315 +- Collapsed (overwrite): `▸ Write src/context/budget.ts · +47 −23`
316 +- Expanded: unified diff (from `metadata.diff`), instant via key `d`. Metadata guaranteed: `title`, `diff`, `additions`, `deletions`, `extra.created`.
317 +
318 +---
319 +
320 +## 4. `edit`
321 +
322 +The most important tool (CLAUDE.md §10). Reference: OpenCode's nine-strategy replacer cascade (OPENCODE §6.2, credited there to Cline/gemini-cli lineage) layered with OpenHands' failure UX (OPENHANDS §4.2).
323 +
324 +### 4.1 Schema
325 +
326 +```json
327 +{
328 + "name": "edit",
329 + "description": "Replace an exact string in a file. Provide the text to find in old_string and its replacement in new_string. old_string must uniquely identify one location: include 3–5 lines of surrounding context exactly as it appears in the file, including whitespace and indentation. If old_string matches multiple locations the edit fails and reports the line numbers — add more context and retry, or set replace_all to true to change every exact occurrence (useful for renames). The tool tolerates minor whitespace drift but will refuse ambiguous or disproportionate fuzzy matches. You must read the file during this session before editing it. On success you get a snippet of the edited region — review it instead of re-reading the file.",
330 + "input_schema": {
331 + "type": "object",
332 + "properties": {
333 + "file_path": {
334 + "type": "string",
335 + "description": "Path of the file to edit (absolute preferred)."
336 + },
337 + "old_string": {
338 + "type": "string",
339 + "description": "The exact existing text to replace, with enough surrounding context to be unique in the file."
340 + },
341 + "new_string": {
342 + "type": "string",
343 + "description": "The replacement text. Must differ from old_string."
344 + },
345 + "replace_all": {
346 + "type": "boolean",
347 + "description": "Replace every exact occurrence of old_string instead of requiring uniqueness. Default false."
348 + }
349 + },
350 + "required": ["file_path", "old_string", "new_string"]
351 + }
352 +}
353 +```
354 +
355 +### 4.2 Preconditions
356 +
357 +1. File must exist (near-miss suggestion as in `read`). Empty `old_string` on an existing file → error directing to `write` for full replacement or to include real context.
358 +2. `old_string === new_string` → error: `old_string and new_string are identical — there is nothing to change.`
359 +3. Read-before-edit and external-modification checks, identical to `write` §3.2 (same `FileTimeRegistry`, same error prose with "Re-read the file").
360 +4. Per-file mutex: concurrent edits to one file are serialized (OpenCode's per-file semaphore).
361 +
362 +### 4.3 The replacer cascade
363 +
364 +Matching runs against the file content normalized to `\n` (original line endings restored on write; BOM split off and rejoined). Strategies run **in order; first strategy that produces at least one match wins** and later strategies never run. KHAELOR orders cheap normalizations before fuzzy block matching — a deliberate divergence from OpenCode (which runs block-anchor third): a near-exact whitespace match must never lose to a fuzzy anchor match.
365 +
366 +| # | Strategy | Matches when | Guards specific to it |
367 +|---|----------|--------------|----------------------|
368 +| 1 | **Exact** | `old_string` appears verbatim. | — |
369 +| 2 | **Line-trimmed** | Line-by-line comparison with each line trimmed of leading/trailing whitespace; line count must match. | Reconstructs the true (untrimmed) span from the file for replacement. |
370 +| 3 | **Whitespace-normalized** | All runs of whitespace collapsed to single spaces on both sides. | Only fires when old_string has ≥1 non-whitespace token. |
371 +| 4 | **Indentation-flexible** | Common leading indentation stripped from every line of `old_string`; body then compared line-trimmed-right. Handles the model copying a block at the wrong indent depth. | Re-applies the *file's* indentation to `new_string` lines (indentation preservation). |
372 +| 5 | **Escape-normalized** | `old_string` with literal `\n`, `\t`, `\"`, `\'`, `\\` unescaped matches (LLMs over-escape). | Applies the same unescaping to `new_string`. |
373 +| 6 | **Trimmed-boundary** | `old_string.trim()` matches; surrounding whitespace in the file preserved. | — |
374 +| 7 | **Block-anchor** | `old_string` has ≥3 lines; first and last lines match exactly (trimmed) as anchors; middle lines matched by Levenshtein similarity ≥ 0.65; candidate block size within ±25% of `old_string`'s. Best-scoring candidate of several wins. | Disproportionate-match guard (§4.4). |
375 +| 8 | **Context-aware** | Anchor lines match and ≥50% of middle lines match trimmed. Last-resort fuzzy. | Disproportionate-match guard (§4.4). |
376 +| 9 | **Multi-occurrence** | `replace_all: true` only — all *exact* occurrences replaced. Fuzzy strategies are never combined with `replace_all`. | — |
377 +
378 +### 4.4 Uniqueness and ambiguity guards
379 +
380 +- **Uniqueness (strategies 1–8):** if the winning strategy yields more than one distinct match position and `replace_all` is false → ambiguity error citing line numbers (§4.6). The cascade does not silently pick the first.
381 +- **Disproportionate-match guard (7–8):** a fuzzy candidate whose character length exceeds `max(3 × old_string.length, old_string.length + 1000)` is refused: the model gave too little context for the match to be trustworthy. Error tells it to re-read and provide the full exact text.
382 +- **`replace_all` semantics:** strategy 9 only (exact matches). Zero exact matches → the not-found error (fuzzy hints included) — never a fuzzy mass-replace. The result reports the occurrence count.
383 +
384 +### 4.5 Write-back, diff, events
385 +
386 +Atomic write identical to §3.2 (temp + fsync + rename; CRLF/BOM/mode preserved). Unified diff computed old→new and attached to `metadata.diff` **and** to the permission request metadata (the permission panel shows the actual diff — OpenCode §8.3). `fileTimes.stamp`; `emit(FileModified{path, additions, deletions, strategy})`. Per-file undo history (last 10 versions, in-memory + spill) is kept for the future `undo` path (OpenHands' `FileHistoryManager`) — not model-exposed in V1.
387 +
388 +### 4.6 Output design
389 +
390 +**Success (model-facing):**
391 +
392 +```
393 +Edited /Users/x/dev/proj/src/context/engine.ts (1 replacement, matched exactly).
394 +Snippet of the edited region (lines 141–152):
395 + 141→ compress(state: SessionState): CompactionPlan {
396 + 142→ const budget = this.budget.usable(state.model);
397 + ...
398 + 152→ }
399 +Review the changes. Edit the file again if the result is not what you intended.
400 +```
401 +
402 +Snippet = edited region ± 4 lines, with real line numbers — the model self-verifies without a re-read (OpenHands §4.2). When a fuzzy strategy fired, the parenthetical names it (`matched with whitespace normalization`) so the model knows its quoted text was imprecise. `replace_all` success: `Edited … (7 replacements).` with a snippet of the first region.
403 +
404 +**Not found:**
405 +
406 +```
407 +No replacement was performed: old_string was not found in /…/engine.ts.
408 +Closest near-miss is at lines 141–149 (differs in whitespace on line 143:
409 +expected " const budget =", file has "\tconst budget ="). Read that region
410 +and provide old_string exactly as it appears in the file.
411 +```
412 +
413 +Near-miss = best block-anchor candidate below threshold, when one exists; otherwise the plain not-found line plus a hint to `read` the file. Never dump the whole file.
414 +
415 +**Ambiguous:**
416 +
417 +```
418 +No replacement was performed: old_string matches 3 locations in /…/engine.ts
419 +(lines 87, 141, 209). Add more surrounding lines to old_string so it uniquely
420 +identifies one location, or set replace_all to true to change all 3.
421 +```
422 +
423 +**Stale file:** identical prose to §3.4 external-modification.
424 +
425 +### 4.7 Rendering contract
426 +
427 +- Collapsed: `▸ Edit src/context/engine.ts · +31 −12`
428 +- Expanded (`d`): the unified diff, syntax highlighted; strategy badge when non-exact. Metadata guaranteed: `title`, `diff`, `additions`, `deletions`, `extra.strategy`, `extra.replacements`.
429 +- Completion line in conversation: `✓ src/context/engine.ts +31 −12` (CLAUDE.md §14).
430 +
431 +---
432 +
433 +## 5. `grep`
434 +
435 +### 5.1 Schema
436 +
437 +```json
438 +{
439 + "name": "grep",
440 + "description": "Fast content search across the repository using ripgrep. pattern is a regular expression (Rust regex syntax; escape literal dots, parens, brackets). Results are grouped by file as 'line_number: line text', files ordered by most recently modified. At most 100 matching lines are returned — if truncated, narrow the pattern or scope with path/include. Respects .gitignore. Use this to locate code; use read to view full context around a match.",
441 + "input_schema": {
442 + "type": "object",
443 + "properties": {
444 + "pattern": {
445 + "type": "string",
446 + "description": "Regular expression to search for."
447 + },
448 + "path": {
449 + "type": "string",
450 + "description": "Directory or file to search in. Defaults to the working directory."
451 + },
452 + "include": {
453 + "type": "string",
454 + "description": "Glob filter for file names, e.g. \"*.ts\" or \"src/**/*.py\"."
455 + }
456 + },
457 + "required": ["pattern"]
458 + }
459 +}
460 +```
461 +
462 +### 5.2 Execution semantics
463 +
464 +Thin wrapper over bundled ripgrep (ship the binary with the npm package; system `rg` fallback with logged warning — OpenHands §4.4). Executed via `workspace.exec`. Flags: smart-case, `--hidden` off, honors `.gitignore` + `.khaelorignore`. Hard limits: **100 matching lines**, 250 chars per line (marker `…`), 10 s timeout. Invalid regex is caught before execution.
465 +
466 +### 5.3 Success output (model-facing)
467 +
468 +```
469 +14 matches in 5 files for "ContextEngine":
470 +
471 +src/context/engine.ts
472 + 12: export class ContextEngine {
473 + 87: // ContextEngine owns compaction triggers
474 +src/kernel/agent.ts
475 + 41: constructor(private context: ContextEngine) {}
476 +...
477 +```
478 +
479 +Zero matches: `No matches for "ContextEnginee" in /…/proj. Check the regex (did you mean "ContextEngine"?) or broaden the scope.` — the near-miss hint appears only when a case-insensitive or edit-distance-1 variant would have matched (cheap re-probe).
480 +
481 +Truncated: header becomes `Showing first 100 of 412 matching lines (…)` and a final line: `[Results truncated. Full results: <spillPath> — or use a more specific pattern, path, or include filter.]`
482 +
483 +### 5.4 Rendering contract
484 +
485 +- Collapsed: `▸ Search "ContextEngine" · 14 matches in 5 files`
486 +- Expanded: grouped match list, highlighted match spans, click/enter opens `read` view at line. Metadata guaranteed: `title`, `matches`, `files`, `truncation?`.
487 +
488 +---
489 +
490 +## 6. `glob`
491 +
492 +### 6.1 Schema
493 +
494 +```json
495 +{
496 + "name": "glob",
497 + "description": "Find files by name pattern, e.g. \"**/*.ts\" or \"src/**/config.*\". Returns matching file paths ordered by most recently modified, at most 100. Respects .gitignore and .khaelorignore. Use this to discover file layout; use grep to search file contents.",
498 + "input_schema": {
499 + "type": "object",
500 + "properties": {
501 + "pattern": {
502 + "type": "string",
503 + "description": "Glob pattern to match file paths against."
504 + },
505 + "path": {
506 + "type": "string",
507 + "description": "Directory to search in. Defaults to the working directory."
508 + }
509 + },
510 + "required": ["pattern"]
511 + }
512 +}
513 +```
514 +
515 +### 6.2 Execution semantics
516 +
517 +Implemented over the repository index's file list when warm (fast path), else `rg --files` + glob filter. Ignore rules: `.gitignore`, `.khaelorignore`, plus built-in noise (`node_modules/`, `.git/`, `dist/` unless the pattern explicitly targets them). Limit 100 paths, mtime-desc.
518 +
519 +### 6.3 Output
520 +
521 +```
522 +23 files match "src/**/*.ts" (newest first):
523 +src/context/engine.ts
524 +src/kernel/agent.ts
525 +...
526 +```
527 +
528 +Zero: `No files match "src/**/*.tsx" under /…/proj. Nearest existing extension: .ts (23 files).` Truncated: `[Showing 100 of 312. Full list: <spillPath> — or narrow the pattern.]`
529 +
530 +### 6.4 Rendering contract
531 +
532 +- Collapsed: `▸ Glob src/**/*.ts · 23 files`
533 +- Expanded: path list with mtime badges. Metadata: `title`, `files`, `truncation?`.
534 +
535 +---
536 +
537 +## 7. `bash`
538 +
539 +### 7.1 Schema
540 +
541 +```json
542 +{
543 + "name": "bash",
544 + "description": "Run a shell command in the workspace and wait for it to finish. Use this for short-lived commands: builds, tests, git, package scripts, file operations. Do NOT use it for long-running processes such as dev servers, watchers, or REPLs — start those with the process tool so they run in the background while you keep working. Commands run in a non-interactive shell from the working directory (use the workdir parameter instead of 'cd'). stdout and stderr are returned interleaved with the exit code. If a command is still running when the time ceiling is reached, it is moved to the background process manager and you get its process id plus the output so far. Quote paths containing spaces.",
545 + "input_schema": {
546 + "type": "object",
547 + "properties": {
548 + "command": {
549 + "type": "string",
550 + "description": "The shell command to execute."
551 + },
552 + "timeout_ms": {
553 + "type": "integer",
554 + "description": "Time budget in milliseconds before the command is moved to the background. Default 120000, maximum 300000."
555 + },
556 + "workdir": {
557 + "type": "string",
558 + "description": "Working directory for the command. Defaults to the project working directory. Use this instead of 'cd'."
559 + }
560 + },
561 + "required": ["command"]
562 + }
563 +}
564 +```
565 +
566 +### 7.2 Execution semantics — and the `process` boundary
567 +
568 +- Runs via `workspace.exec` in its **own process group** (`detached: true`, kill by `-pgid` — mini-SWE's kill hygiene) with a PTY when available (correct output for tools that sniff TTY), `TERM=dumb`-safe fallback otherwise. Non-interactive: stdin closed.
569 +- Environment: inherited, minus KHAELOR-internal variables; `NO_COLOR` unset (color stripped at render, kept in spill).
570 +- Permission evaluation happens on the parsed command **before** execution (capabilities: `process.execute`, plus derived `network.access` / `git.modify` / `file.write.outsideProject` — PERMISSION_MODEL §2–3).
571 +- **Hard timeout ceiling → redirect, not kill (ADR-8, Hermes §6.1).** At `timeout_ms` (default 120 s, cap 300 s), the still-running command is *adopted by the ProcessManager*: it keeps its process group, gains a process id, its output streams into the ring buffer + spill log, and `bash` returns immediately with the output so far. Nothing is silently killed; nothing blocks forever. (OpenHands' `exit_code=-1` soft-timeout *convention* is explicitly rejected as primary mechanism — the redirect is structural, not a convention the model must learn.)
572 +- User interrupt (Esc) kills the process group of a foreground `bash` command (it was meant to be short-lived) — unlike `process`-managed processes, which survive.
573 +- Events: `ProcessStarted` / `ProcessExited` (durable); `ProcessOutput` chunks are ephemeral, with the completed result durable in `ToolCompleted`.
574 +
575 +### 7.3 Output and truncation
576 +
577 +```
578 +$ npm test
579 +> proj@0.3.1 test
580 +> vitest run
581 + ✓ src/context/engine.test.ts (14 tests)
582 +...
583 +[exit code 0 · 3.2s · cwd /Users/x/dev/proj]
584 +```
585 +
586 +Limits: 400 lines / 30 KB, middle-out (head 250 / tail 150) with the standard spill marker (§1.3). Non-zero exit is **not** `isError` at the envelope level — the model must see failing output as normal observation (`[exit code 1 · …]`); `isError` is reserved for KHAELOR-level failures (spawn failure, permission denial, cancellation).
587 +
588 +Redirect result:
589 +
590 +```
591 +Command still running after 120s — moved to background as process p4.
592 +Output so far:
593 +...
594 +Use process {"action":"read","id":"p4"} to see new output, or {"action":"stop","id":"p4"} to stop it.
595 +```
596 +
597 +### 7.4 Errors
598 +
599 +- Spawn failure: `Command failed to start: npmm: command not found. Did you mean "npm"?` (PATH near-miss probe, best-effort).
600 +- Permission denial: model-facing prose from PERMISSION_MODEL §5.4 — a course correction, not a dead end.
601 +
602 +### 7.5 Rendering contract
603 +
604 +- Collapsed: `▸ Run npm test · exit 0 · 3.2s` (failure: `▸ Run npm test · exit 1 · 4.1s` with failure styling + symbol, never color alone).
605 +- Expanded: scrollable terminal-styled output (ANSI-rendered from spill), exit code, duration, cwd. While running, the status line shows `● Running npm test · 12s`. Metadata: `title`, `exitCode`, `durationMs`, `truncation?`, `extra.cwd`, `processId?` (when redirected).
606 +
607 +---
608 +
609 +## 8. `process`
610 +
611 +Model-facing background process manager (ADR-8 — OpenCode's biggest tool-level gap, "do not inherit the omission"). One tool, action-discriminated, 5 parameters.
612 +
613 +### 8.1 Schema
614 +
615 +```json
616 +{
617 + "name": "process",
618 + "description": "Manage long-running background processes: dev servers, watchers, REPLs, anything that should keep running while you continue working. Actions: 'start' launches a command in the background and returns its process id immediately; 'list' shows all managed processes with status; 'read' returns output produced since your last read (or from line 'offset' if given); 'write' sends text to the process's stdin (include \\n to submit a line); 'stop' terminates the process and its children. Background processes keep running while you edit files and run other commands — start a server, keep working, then read its output to check on it. They survive user interruptions but end when the session ends. Do not use this for short commands; use bash.",
619 + "input_schema": {
620 + "type": "object",
621 + "properties": {
622 + "action": {
623 + "type": "string",
624 + "enum": ["start", "list", "read", "write", "stop"],
625 + "description": "The operation to perform."
626 + },
627 + "command": {
628 + "type": "string",
629 + "description": "Shell command to launch. Required for 'start'."
630 + },
631 + "id": {
632 + "type": "string",
633 + "description": "Process id, e.g. \"p3\". Required for 'read', 'write', 'stop'."
634 + },
635 + "input": {
636 + "type": "string",
637 + "description": "Text to send to stdin. Required for 'write'. End with \\n to submit a line."
638 + },
639 + "offset": {
640 + "type": "integer",
641 + "description": "For 'read': 1-based output line to read from, instead of 'new output since last read'."
642 + }
643 + },
644 + "required": ["action"]
645 + }
646 +}
647 +```
648 +
649 +### 8.2 ProcessManager lifecycle
650 +
651 +```ts
652 +export interface ManagedProcess {
653 + id: string; // "p1", "p2" … session-scoped handle — NOT the OS pid
654 + pid: number; // OS pid, with start-time recorded (PID-reuse guard, Hermes §6.2)
655 + command: string;
656 + status: "running" | "exited" | "stopped" | "failed";
657 + exitCode: number | null;
658 + startedAt: number;
659 + cwd: string;
660 + logPath: string; // full output spill: ~/.khaelor/process-logs/<session>/<id>.log
661 +}
662 +
663 +export interface ProcessManager {
664 + start(command: string, cwd: string): Promise<ManagedProcess>;
665 + list(): ManagedProcess[];
666 + read(id: string, opts?: { offset?: number }): ProcessRead;
667 + write(id: string, input: string): Promise<void>;
668 + stop(id: string): Promise<{ exitCode: number | null }>; // SIGTERM → 3s grace → SIGKILL, whole process group
669 + adopt(child: SpawnedChild): ManagedProcess; // bash timeout redirect (§7.2)
670 + stopAll(): Promise<void>; // session end
671 +}
672 +```
673 +
674 +- **PTY-backed** where available (dev servers behave correctly), own process group.
675 +- **Output ring buffer with spill:** per-process in-memory ring of 10,000 lines / 2 MB; **all** output is simultaneously appended to `logPath` (never truncated, session GC + 512 MB cap shared with §1.3). Ring overflow loses nothing — old lines are already on disk, and `read` with `offset` reads from the log.
676 +- **Read cursor:** each process keeps a per-session read cursor; `read` without `offset` returns lines since the cursor and advances it (Hermes' poll/log pagination). Read page cap: 300 lines / 20 KB with standard spill marker pointing at `logPath`.
677 +- Exit is detected and recorded (`ProcessExited` durable event) even if the model never reads again; `list` and the status bar reflect it. Crash of KHAELOR itself: log files survive; managed processes are killed on graceful shutdown, orphan-checked on restart via pid+start-time.
678 +- User interruption (Esc) does **not** touch managed processes (ADR-11). `stopAll` runs on session end after user-visible notice.
679 +
680 +### 8.3 Outputs (model-facing)
681 +
682 +**start:**
683 +```
684 +Started p3 (pid 41232): npm run dev
685 +cwd /Users/x/dev/proj · log /Users/x/.khaelor/process-logs/s_ab12/p3.log
686 +First output (waited up to 2s):
687 + VITE v5.4.1 ready in 431 ms
688 + ➜ Local: http://localhost:5173/
689 +Use process {"action":"read","id":"p3"} for new output.
690 +```
691 +(`start` waits up to 2 s for initial output — enough to catch instant failures like port-in-use without blocking on healthy servers. A command that exits within the window returns its status inline: `Process p3 exited immediately with code 1: …`.)
692 +
693 +**list:**
694 +```
695 +PROCESSES
696 +p3 npm run dev running 04:32 pid 41232
697 +p4 pytest -x running 00:18 pid 41390
698 +p1 npm test exited code 0
699 +```
700 +
701 +**read:** `Output of p3 since last read (lines 84–131 of 131):` + lines; nothing new → `No new output from p3 since last read (still running, 131 lines total). Use offset to re-read earlier output.`
702 +
703 +**write:** `Sent 14 bytes to p3 stdin.` (followed by an automatic 500 ms read of any response, appended as `Output:` — saves the model a round trip).
704 +
705 +**stop:** `Stopped p3 (npm run dev) · exit code null (SIGTERM) · ran 06:12. Full log: /…/p3.log`
706 +
707 +### 8.4 Errors
708 +
709 +- Unknown id: `No process "p7". Active: p3 (npm run dev, running), p4 (pytest, running). Use {"action":"list"} to see all.`
710 +- `write`/`read` on exited process: states the exit code and points at the log path.
711 +- Missing conditional params (e.g. `start` without `command`): schema-level repair prose (§1.2).
712 +
713 +### 8.5 Rendering contract
714 +
715 +- Collapsed: `▸ Process start npm run dev · p3 running` / `▸ Process read p3 · 47 new lines` / `▸ Process stop p3 · exited`
716 +- Expanded: per-action — start shows first output; read shows the page; list renders the table.
717 +- **Status bar integration:** running process count (`⚙ 2`) appears in the status bar; `/processes` opens the full panel with live tails. Metadata: `title`, `processId`, `exitCode?`, `extra.status`, `extra.newLines?`.
718 +
719 +---
720 +
721 +## 9. Conformance checklist (tests to ship with `src/tools/`)
722 +
723 +- [ ] Every schema round-trips: Zod → JSON Schema → Anthropic `input_schema`; ≤5 params each.
724 +- [ ] Golden tests for every model-facing output and error string in this document.
725 +- [ ] Edit cascade: one fixture per strategy (1–9), plus ambiguity, disproportionate-guard, CRLF, BOM, replace_all-zero-match.
726 +- [ ] Read-before-write and external-modification enforcement for `write` and `edit`; registry rebuild on resume.
727 +- [ ] Truncation: head/tail boundaries exact; spill files created; 64 KB executor backstop.
728 +- [ ] `bash` timeout redirect: command survives, appears in `process list`, output continuous across the seam.
729 +- [ ] Process-group kill: `stop` reaps grandchildren; PID-reuse guard.
730 +- [ ] No `node:fs`/`node:child_process` imports outside `src/workspace/` (lint guard, ADR-13).
731 +- [ ] Header reminder fires for new headerless source files; not for `.json`/vendored paths.
732 +
733 +---
734 +
735 +*Author: Simon-Pierre Boucher · contact@spboucher.ai*
added docs/TUI_DESIGN.md +951 −0
@@ -0,0 +1,951 @@
1 +<!--
2 +KHAELOR
3 +File: docs/TUI_DESIGN.md
4 +Author: Simon-Pierre Boucher
5 +Contact: contact@spboucher.ai
6 +-->
7 +
8 +# KHAELOR — TUI Design (V1, definitive)
9 +
10 +> Phase 1 deliverable. The terminal IS the product (Absolute Rule #2). This document fixes the
11 +> layout architecture, every visual element, every interaction, the rendering techniques, and the
12 +> Phase 2 framework spike that selects the renderer. Techniques here are framework-independent and
13 +> are adopted regardless of the spike outcome (ADR-14).
14 +>
15 +> Aesthetic contract (CLAUDE.md §14): minimal · calm · dense when needed · keyboard-native ·
16 +> hierarchy from spacing, typography, subtle color, indentation, and status — never from noise.
17 +> No rainbow colors, no giant banners, no border mazes, no constant animation, no emoji spam.
18 +
19 +---
20 +
21 +## 0. Framework decision: the two candidates, and the recommendation
22 +
23 +### 0.1 Empirical facts (established, not speculative)
24 +
25 +1. **`@opentui/core` is eliminated.** OpenCode's engine depends on `bun-ffi-structs` — it is
26 + Bun-FFI-bound and not viable for KHAELOR's Node-only `npm install -g` distribution (ADR-1).
27 + ADR-14's candidate (b) is dead; its *techniques* (16 ms coalescing, delta-driven repaints,
28 + width-responsive chrome) survive and are adopted below.
29 +2. **Ink 7 requires Node ≥ 22.** KHAELOR targets Node ≥ 22, so Ink 7 is compatible.
30 +3. **Stock Ink's full-rerender model is a demonstrated risk.** Hermes had to vendor a ~100-file
31 + Ink fork (ScrollBox, alternate screen, mouse, selection, virtualization) to get acceptable
32 + streaming behavior (HERMES §8.1).
33 +
34 +### 0.2 The two remaining candidates
35 +
36 +- **(a) Ink 7, strictly bounded**: all settled content rendered through `<Static>` (written once
37 + to stdout, never reconciled again); the live tree is *only* the bounded live region (§1). Ink's
38 + full-rerender cost is then proportional to ~20 lines, not the session.
39 +- **(b) Minimal custom ANSI renderer**: a purpose-built renderer for KHAELOR's fixed layout —
40 + append-only scrollback writes + a repaintable live region, synchronized-output frames, a
41 + hand-written line editor. No reconciler, no flexbox, no framework.
42 +
43 +Both are wired behind the same thin `RendererAdapter` (§15) so the Phase 2 spike is cheap and the
44 +loser is discarded without touching the rest of the system.
45 +
46 +### 0.3 Recommendation: **(b) the minimal custom ANSI renderer**, with Ink 7 as the control
47 +
48 +Rationale:
49 +
50 +- **The layout architecture removes the need for a framework.** KHAELOR's design (§1) commits to
51 + terminal-native scrollback with print-once immutable settled content. The only thing that ever
52 + repaints is a bounded live region of ≤ ~24 lines. A reconciler + Yoga layout engine managing a
53 + fixed 24-line strip is machinery without a problem. The same commitment is what makes a custom
54 + renderer *tractable* — ADR-14 predicted exactly this ("option (c) is viable precisely because
55 + the adopted techniques are what make a custom renderer tractable").
56 +- **Both mature reference teams ended up owning their renderer.** OpenCode built `@opentui` from
57 + scratch; Hermes forked Ink into ~100 vendored files. The pattern across the two products whose
58 + terminal feel we respect is: at this quality bar you own the paint path eventually. Owning ~1.5–2K
59 + purpose-built lines from day one is cheaper than owning a fork of someone else's reconciler.
60 +- **Exact control of the properties the spec makes non-negotiable**: DEC 2026 synchronized-output
61 + frames (flicker), cursor parking (stable input), zero framework overhead between keypress and
62 + echo (<16 ms), no retained render tree growing with the session (memory), plain stdout writes
63 + for settled content (terminal-native selection/copy).
64 +- **Honest cost**: the line editor, wrapping, and overlay painting are real work (Hermes' composer
65 + is a 47 KB hand-written editor). This is the one axis where Ink wins, which is why Ink 7 is
66 + built as the spike's control candidate and remains fully acceptable if it passes the criteria
67 + in §15.4 and the custom editor cost blows the Phase 2 budget.
68 +
69 +The spike (§15) decides on measurements, not taste. If Ink 7 (a) passes every criterion and (b)
70 +ships materially sooner, Ink wins — the recommendation is a prior, not a verdict.
71 +
72 +---
73 +
74 +## 1. Layout architecture
75 +
76 +### 1.1 Position: terminal-native scrollback, no alternate screen for conversation
77 +
78 +KHAELOR renders the conversation into the **main screen buffer**, like a well-behaved CLI — not an
79 +alternate-screen full-screen app.
80 +
81 +Justification:
82 +
83 +- **Selection/copy is a hard criterion.** Native terminal selection, copy, and search work on
84 + printed scrollback for free. Alternate-screen apps must reimplement selection (Hermes' fork did;
85 + OpenCode disables Escape-dismissal during mouse selection just to protect it — OPENCODE §3.6).
86 +- **Scrollback is free and unbounded.** No virtualization, no Hermes `useVirtualHistory`, no
87 + OpenCode 100-message UX cliff (explicitly rejected, OPENCODE NOT-COPY #6). The terminal already
88 + ships a better scrollback than we can write.
89 +- **Crash-safe transcript.** If KHAELOR dies, the conversation remains on screen.
90 +- **Memory.** Settled content leaves the process; the live data structures are O(live region), not
91 + O(session).
92 +
93 +**The settled/live split** (the load-bearing rule of the whole design):
94 +
95 +- **Settled content** — completed message blocks, finished tool rows, committed user messages — is
96 + printed to scrollback **exactly once** and never touched again. There is no retroactive mutation
97 + of printed lines, ever.
98 +- **Live region** — a bounded strip pinned to the bottom (≤ ~24 rows) that is the *only* thing
99 + repainted: the streaming tail of the current response, the agent status line, the composer, and
100 + the status bar. Every repaint is wrapped in a DEC 2026 synchronized-output frame.
101 +
102 +**One exception:** explicitly-entered full-screen viewers (`/diff` viewer §7.2, and nothing else
103 +in V1) use the alternate screen like `less` does — enter, navigate, `q`, return with the
104 +conversation untouched. A pager is the one UI shape the main buffer genuinely cannot host.
105 +
106 +### 1.2 Screen anatomy
107 +
108 +```
109 +┌─ terminal scrollback (native, unbounded, selectable) ─────────────────┐
110 +│ … earlier conversation, printed once, immutable … │
111 +│ │
112 +│ ❯ add retry logic to the session store │
113 +│ │
114 +│ ▸ Read src/session/store.ts │
115 +│ ▸ Search "retry" · 6 matches │
116 +│ │
117 +│ I found the failure point in SessionStore.append — writes │
118 +│ are not retried on transient EAGAIN. Fixing that first. │
119 +├─ live region (bounded, repainted as one synchronized frame) ──────────┤
120 +│ ▸ Edit src/session/store.ts ← streaming tail│
121 +│ │
122 +│ ● Editing src/session/store.ts · 3.1s ← agent status │
123 +│ │
124 +│ ╭─────────────────────────────────────────────────╮ │
125 +│ │ ❯ _ │ ← composer box │
126 +│ ╰─────────────────────────────────────────────────╯ │
127 +│ main +2 −0 │ claude-sonnet │ context 24% │ $0.31 ← status bar│
128 +└───────────────────────────────────────────────────────────────────────┘
129 +```
130 +
131 +(The frame above is illustrative; KHAELOR draws no boxes around these regions.)
132 +
133 +Live-region rules:
134 +
135 +- **Hard caps** (Hermes issue #34095 — unbounded live trails OOM-killed Node): live streaming tail
136 + ≤ 16,000 chars / ≤ `min(240, rows − 8)` lines. When the tail exceeds the cap, its settled head is
137 + flushed to scrollback (§8 defines "settled") and the region shrinks back.
138 +- The composer is always the last editable element; the status bar is always the last row.
139 +- **Overlays** (palettes, pickers, permission panel, config) render *inside* the live region,
140 + replacing the streaming-tail slot, above the composer/status bar. They are bounded panels, not
141 + floating windows — there is no compositor on the main screen buffer.
142 +- On resize (`SIGWINCH`): scrollback is left alone (the terminal reflows or doesn't — its
143 + business); the live region is fully repainted at the new width within one frame.
144 +
145 +### 1.3 Repaint discipline
146 +
147 +- One repaint pass per animation frame; input events, stream deltas, and process output are
148 + coalesced in a **16 ms window** into a single frame (ADR-4; OpenCode `batch()`, OPENCODE §3.3;
149 + Hermes converged at 33 ms — we take the stricter figure).
150 +- Every frame: `CSI ?2026h` … move cursor to live-region origin … repaint changed rows only
151 + (per-row damage tracking) … park the cursor at the composer caret … `CSI ?2026l`. Terminals
152 + without 2026 support get cursor-hide/show bracketing as fallback.
153 +- Settled content is emitted *between* frames as plain writes above the live region (erase live
154 + region → print settled block → repaint live region), so scrollback stays clean for
155 + selection/copy.
156 +
157 +---
158 +
159 +## 2. Startup experience
160 +
161 +`khaelor` reaches an editable prompt in < 150 ms (§14). Nothing blocks on the network; git status
162 +and index warmup fill in asynchronously (status bar segments appear when real data exists —
163 +Absolute Rule #4).
164 +
165 +```
166 + KHAELOR
167 + ~/dev/my-project · main
168 + claude-sonnet-4-5 · thinking adaptive
169 +────────────────────────────────────────────────────
170 + ╭──────────────────────────────────────────────────╮
171 + │ ❯ What do you want to build? │
172 + ╰──────────────────────────────────────────────────╯
173 +```
174 +
175 +- Three lines of identity (the wordmark carries the brand gradient), one rule, the composer box.
176 + The question lives inside the box as a dim placeholder on first run — after the first message
177 + the box shows just the prompt glyph. No ASCII logo, no version spam, no log lines, no animation.
178 +- The rule line spans the terminal width (dim). The model line shows the *configured* model id or
179 + alias — never a hard-coded name.
180 +- If `ANTHROPIC_API_KEY` is missing, the question line is replaced by a single calm instruction and
181 + the composer accepts `/config`:
182 +
183 +```
184 + KHAELOR
185 + ~/dev/my-project · main
186 +────────────────────────────────────────────────────
187 + No Anthropic API key found.
188 + Set ANTHROPIC_API_KEY or run /config to add one.
189 + ╭──────────────────────────────────────────────────╮
190 + │ ❯ _ │
191 + ╰──────────────────────────────────────────────────╯
192 +```
193 +
194 +- Resuming (`khaelor` in a project with an interrupted session) adds exactly one line:
195 + `Interrupted session from 12 min ago · /resume to continue` — no auto-resume, no modal.
196 +
197 +---
198 +
199 +## 3. The composer
200 +
201 +The highest-priority component (CLAUDE.md §14). Reference standard: OpenCode's prompt
202 +(OPENCODE §3.5) — structured parts, not a flat string.
203 +
204 +### 3.1 Anatomy
205 +
206 +The composer is a rounded bordered box, full terminal width minus a one-column margin:
207 +
208 +```
209 + ╭────────────────────────────────────────────────────────────────╮
210 + │ ❯ refactor @src/session/store.ts to journal events atomically, │
211 + │ then run the tests_ │
212 + ╰────────────────────────────────────────────────────────────────╯
213 +```
214 +
215 +- Prompt glyph `❯` (accent color; `>` in ASCII fallback) on the first content row; continuation
216 + rows indent to align. The hardware cursor parks at the real text position inside the box.
217 +- Content grows from 1 row to `min(8, rows/3)` rows, then scrolls internally; the box height is
218 + content rows + 2 border rows.
219 +- Border state: brand gradient (violet→cyan) while the agent is idle — the box is the focus; dim
220 + while the agent works. The glyph dims with it; queued input is always allowed (§3.6), and a
221 + `⋯ n queued` indicator rides the bottom border.
222 +- On first run the empty box shows a dim placeholder (`What do you want to build?`); afterwards
223 + just the prompt glyph.
224 +- Below 40 columns the box degrades to a plain ` ❯ ` prompt line (no borders).
225 +- Palettes (§4), the permission panel (§9), and other overlays render *above* the box; the box and
226 + status bar are never displaced.
227 +
228 +### 3.2 Model: structured parts over a text buffer
229 +
230 +The buffer is text + **spans** (the extmark idea, OPENCODE §3.5): file mentions and collapsed
231 +pastes are spans with display text, style, and structured payload. Span offsets are maintained
232 +through every edit. Submission produces structured parts — `text | fileRef{path, range?} |
233 +pastedBlock{content}` — so the Context Engine receives references, not flattened strings.
234 +
235 +- **Paste intelligence**: bracketed paste; ≥ 3 lines or > 150 chars collapses to a
236 + `⧉ pasted 47 lines` span (expanded only at submit); a path-looking paste becomes a file mention.
237 +- **History**: `~/.khaelor/prompt-history.jsonl`, 50 entries per project, deduplicated; Up at
238 + buffer start / Down at buffer end navigate it (cursor-position-aware, so multiline editing is
239 + never hijacked).
240 +- **Undo/redo**: a bounded edit-op stack (`Ctrl+_` undo; best-effort, in-composer only).
241 +- **External editor**: `Ctrl+G` round-trips the buffer through `$EDITOR`, re-locating spans by
242 + placeholder tokens on return.
243 +
244 +### 3.3 Slash commands
245 +
246 +`/` at offset 0 opens the slash palette (§4.1) anchored above the composer. Typing filters;
247 +Enter completes or executes.
248 +
249 +### 3.4 `@` file mentions
250 +
251 +`@` opens fuzzy repository search over the repository index (respecting `.gitignore` /
252 +`.khaelorignore`), ranked by match score × frecency (`frequency / (1 + ageDays)` — OpenCode's
253 +formula, stored in `~/.khaelor/frecency.jsonl`):
254 +
255 +```
256 + ❯ refactor @agent
257 + ┌────────────────────────────────────────┐
258 + src/kernel/agent.ts ★
259 + src/agents/agent-runtime.ts
260 + tests/agent.test.ts
261 + └────────────────────────────────────────┘
262 +```
263 +
264 +(`★` = frecency-boosted; dim, not loud.) Selection inserts a **file-reference span** —
265 +`@src/kernel/agent.ts` — a structured reference the Context Engine resolves, not file contents.
266 +Range syntax `@src/kernel/agent.ts:40-90` parses in V1; the picker UI for ranges is post-V1.
267 +
268 +### 3.5 Shell mode
269 +
270 +`!` at offset 0 switches the composer into shell mode for one submission:
271 +
272 +```
273 + ! git status --short
274 +```
275 +
276 +The glyph changes to `!` (warning tint). Output prints to scrollback as a settled block, marked
277 +`$ git status --short` with head/tail truncation for long output; a one-key follow-up hint
278 +(`a — add output to context`) lets it become agent context explicitly. Shell mode runs under the
279 +same permission rules as agent `bash`.
280 +
281 +### 3.6 Message queueing while the agent works (steering)
282 +
283 +The composer never locks. Text typed mid-run is submitted normally and queued (ADR-11: injected
284 +only at safe tool-result boundaries, never breaking role alternation):
285 +
286 +```
287 + ▸ Run npm test · running 8s
288 +
289 + ⋯ Queued — use the smaller fixture instead
290 + Esc cancel run · Ctrl+U discard queued
291 +```
292 +
293 +Queued instructions render in the live region with the `⋯` marker until injected, at which point
294 +they settle into scrollback as a normal user message. Multiple queued messages stack in order.
295 +
296 +### 3.7 Composer key bindings
297 +
298 +| Key | Action |
299 +|---|---|
300 +| `Enter` | Submit (or queue, while agent runs) |
301 +| `Shift+Enter` / `Ctrl+J` | Insert newline (`Shift+Enter` via kitty-keyboard / modifyOtherKeys when detected; `Ctrl+J` always works; trailing `\` + `Enter` also continues) |
302 +| `←` `→`, `Ctrl+B` `Ctrl+F` | Move by character |
303 +| `Alt+←/→`, `Alt+B` `Alt+F` | Move by word |
304 +| `Ctrl+A` / `Ctrl+E` | Line start / line end |
305 +| `↑` / `↓` | Line up/down in multiline; history at buffer edges |
306 +| `Ctrl+R` | Incremental history search |
307 +| `Backspace` / `Ctrl+H` | Delete char back |
308 +| `Ctrl+W` / `Alt+Backspace` | Delete word back |
309 +| `Alt+D` | Delete word forward |
310 +| `Ctrl+U` | Delete to line start (or discard queued message when composer empty) |
311 +| `Ctrl+_` | Undo |
312 +| `Tab` | Accept selected completion |
313 +| `Ctrl+G` | Edit buffer in `$EDITOR` |
314 +| `/` (at offset 0) | Slash palette |
315 +| `@` | File-mention search |
316 +| `!` (at offset 0) | Shell mode |
317 +
318 +---
319 +
320 +## 4. Palettes
321 +
322 +Both palettes are the same component (one generic filter-list, as OpenCode's `dialog-select`
323 +proves out — OPENCODE §3.6) with different sources. They render in-live-region, anchored above the
324 +composer, max height `min(12, rows − 6)`.
325 +
326 +### 4.1 Slash palette
327 +
328 +```
329 + ❯ /se
330 + ┌──────────────────────────────────────────────────────┐
331 + /sessions browse and resume sessions
332 + /new start a new session
333 + /resume resume the most recent session
334 + └──────────────────────────────────────────────────────┘
335 + ↑↓ navigate · Enter run · Esc close
336 +```
337 +
338 +- Fuzzy filtering (fuzzysort-style scoring with exact-prefix bonus), selected row inverted, match
339 + characters underlined (not colored-only — §12).
340 +- Full V1 set: `/model /config /permissions /context /sessions /resume /new /rename /clear
341 + /compact /cost /status /diff /processes /help /quit`.
342 +
343 +### 4.2 Universal command palette — `Ctrl+K`
344 +
345 +Same panel, sourced from the **command registry** (one registry powers keys, slash commands, and
346 +the palette — OpenCode's proven unification, OPENCODE §3.6), showing live bindings:
347 +
348 +```
349 + ┌──────────────────────────────────────────────────────┐
350 + ❯ diff_
351 + ──────────────────────────────────────────────────────
352 + View diff /diff d
353 + Compact context /compact
354 + Show processes /processes
355 + └──────────────────────────────────────────────────────┘
356 + ↑↓ navigate · Enter run · Esc close
357 +```
358 +
359 +Users never need to memorize commands: everything reachable is listed with its key and slash name.
360 +
361 +---
362 +
363 +## 5. Agent status line
364 +
365 +**One** compact dynamic line in the live region, directly above the composer. States:
366 +`thinking · reading · searching · editing · running · waiting · verifying · idle`.
367 +
368 +```
369 + ● Searching repository · 2.3s
370 + ● Editing src/kernel/agent.ts
371 + ● Running npm test · 41/148
372 + ● Waiting for permission
373 + ● Verifying · npm run typecheck
374 +```
375 +
376 +Rules (Absolute Rule #4 and §18 — no spinner-driven UX):
377 +
378 +- Every element is **real data**: the state derives from actual bus events (`ToolStarted`,
379 + `ModelRequestStarted`, …); elapsed time is a real timer; counts like `41/148` appear **only**
380 + when a tool parser actually extracted them. Never a fabricated percentage, never `⠋ Thinking...`
381 + as a substitute for information we have.
382 +- `●` pulses between two shades at ~2 Hz while active — the only animation in the product — and is
383 + `○` when idle. In monochrome, `●`/`○` still carry the distinction.
384 +- Width is pre-reserved so the line never jitters as text changes (Hermes' spinner-width trick,
385 + HERMES §8.2). One line, always; transient states are never printed into the conversation.
386 +- When idle the line collapses to nothing (the composer moves up a row).
387 +
388 +---
389 +
390 +## 6. Tool call presentation
391 +
392 +### 6.1 Collapsed one-liners (default)
393 +
394 +Each tool call settles into scrollback as exactly one line:
395 +
396 +```
397 + ▸ Read src/kernel/agent.ts · 212 lines
398 + ▸ Search "ContextEngine" · 14 matches
399 + ▸ Edit src/context/engine.ts · +31 −12
400 + ▸ Run npm test · passed · 4.2s
401 + ▸ Run npm test · 2 failed · 6.8s
402 + ▸ Start process 3121 · npm run dev
403 +```
404 +
405 +- `▸` dim; tool verb normal; argument bright; result annotation dim. Failures swap the annotation
406 + to the error color **and** the word `failed` (never color alone). Counts (`+31 −12`,
407 + `14 matches`, exit codes, durations) come from real tool results.
408 +- While running, the row lives in the live region with the elapsed timer
409 + (`▸ Run npm test · 8s`) and a rolling tail of output when useful; it settles to its final
410 + one-liner when the tool completes.
411 +
412 +### 6.2 Expansion
413 +
414 +Settled scrollback is immutable (§1.1), so expansion **prints** detail rather than mutating rows:
415 +
416 +- **Live turn**: `Ctrl+T` cycles the detail level of the current turn's live tool row
417 + (`collapsed → tail (12 lines) → collapsed`), Hermes' three-state `DetailsMode` reduced to two.
418 +- **After settling**: every tool call gets a turn-local index shown on demand. `d` (empty composer)
419 + prints the most recent edit's diff (§7.1); `/tool` lists this turn's calls; `/tool 3` prints
420 + call 3's full detail as a new settled block:
421 +
422 +```
423 + ▸ Run npm test · 2 failed · 6.8s [3]
424 + …
425 + ── tool 3 · npm test ────────────────────────────────────
426 + FAIL src/context/engine.test.ts
427 + ✕ compaction preserves running processes
428 + … 214 lines omitted · full output: ~/.khaelor/tool-out/8f3a.txt
429 + ─────────────────────────────────────────────────────────
430 +```
431 +
432 +### 6.3 Long output
433 +
434 +Head/tail truncation with explicit omission markers; the full output is spilled to
435 +`~/.khaelor/tool-out/<id>.txt` and the path is shown (and given to the model — ADR-8). The
436 +conversation layout is never destroyed by a 40,000-line test log: what settles is bounded
437 +(≤ 12 lines per tool by default, matching Hermes' persisted-trail cap).
438 +
439 +---
440 +
441 +## 7. Diff presentation
442 +
443 +### 7.1 Inline (after every edit)
444 +
445 +Never bare "Edited file":
446 +
447 +```
448 + ✓ src/context/engine.ts +31 −12 d expand diff
449 +```
450 +
451 +`d` (composer empty) prints the unified diff of the most recent edit as a settled block, syntax
452 +highlighted, `+` lines in the added color, `−` in the removed color, with `+`/`−` glyphs
453 +preserved for monochrome:
454 +
455 +```
456 + ── diff · src/context/engine.ts · +31 −12 ───────────────
457 + @@ -84,7 +84,9 @@ export class ContextEngine {
458 + - const budget = this.window - used;
459 + + const reserve = this.config.compactionReserve;
460 + + const budget = this.window - used - reserve;
461 + ─────────────────────────────────────────────────────────
462 +```
463 +
464 +### 7.2 `/diff` — the full viewer (alternate screen)
465 +
466 +The one full-screen surface in V1 (§1.1). Enter → alternate screen; `q`/`Esc` → back, conversation
467 +untouched. Shows the session's cumulative changes (baseline attribution per ADR-15 — only
468 +KHAELOR's changes, never pre-existing user diff).
469 +
470 +Side-by-side when `width > 120` (OpenCode's threshold), unified below:
471 +
472 +```
473 + /diff · 3 files · +64 −21 2/3
474 + ─────────────────────────────────────────────────────────────────
475 + src/session/store.ts +18 −6
476 + ▸src/context/engine.ts +31 −12
477 + src/tools/edit.ts +15 −3
478 + ─────────────────────────────────────────────────────────────────
479 + 84 const budget = │ 84 const reserve = this.config.
480 + 85 this.window - used; │ 85 const budget = this.window -
481 + ─ │ 86 used - reserve; +
482 + ─────────────────────────────────────────────────────────────────
483 + ↑↓/jk scroll · ]/[ next/prev file · Tab file list · u unified · q close
484 +```
485 +
486 +Syntax highlighting per §8.2; hunk navigation `]`/`[` (OpenCode's diff-viewer bindings);
487 +added/removed counts per file and total; accept/revert hooks are post-V1 (no shadow git in V1,
488 +ADR-15).
489 +
490 +---
491 +
492 +## 8. Markdown rendering pipeline
493 +
494 +**Settled-block incremental streaming** — Hermes' `StreamScanState` technique (HERMES §8.2),
495 +adopted as-is:
496 +
497 +1. Stream deltas append to a raw tail rendered as lightly-styled plain text (inline code and bold
498 + get cheap regex styling; nothing structural).
499 +2. A scanner advances only over newline-terminated input, detecting **settled top-level blocks**
500 + (boundary: blank line outside a code fence; a fence settles at its closing fence).
501 +3. A settled block is rendered **once** through the full markdown renderer and flushed to
502 + scrollback (immutable). Only the live tail is ever re-scanned — never O(blocks²)
503 + re-tokenization, and settled text never reflows or flickers.
504 +4. On `ModelFinished`, the remaining tail settles.
505 +
506 +Renderer scope (V1): headings (spacing + weight, no banner rules), bold/italic/strikethrough,
507 +inline code (subtle background tint), fenced code blocks, ordered/unordered/nested lists, tables,
508 +blockquotes, links (OSC 8 hyperlinks when supported; `text (url)` otherwise), horizontal rules.
509 +
510 +- **Code blocks**: syntax highlighting via a lightweight token highlighter (Hermes-style
511 + hand-rolled per-language rules with an LRU cache, or `highlight.js` grammars re-emitted as ANSI
512 + — spike decides by startup cost; Shiki/WASM is excluded from the hot path for cold-start
513 + reasons). Long lines wrap with a dim `↪` continuation marker; content is copy-friendly plain
514 + text in scrollback — **no** background-color fills that poison copied text, a thin dim gutter
515 + `│` marks the block instead.
516 +- **Tables** render with box-drawing only when they fit the width; otherwise degrade to aligned
517 + plain columns.
518 +- A block that would exceed the live cap mid-stream flushes early at the last safe line boundary
519 + (§1.2 caps).
520 +
521 +---
522 +
523 +## 9. Panels
524 +
525 +All panels are live-region overlays (§1.2): bounded, keyboard-driven, `Esc` closes, opening takes
526 +one keypress or one slash command. None of them clears the conversation.
527 +
528 +### 9.1 Permission panel (CLAUDE.md §13 — verbatim contract)
529 +
530 +```
531 +╭─ KHAELOR requests permission ─────────────────────╮
532 +│ Run │
533 +│ npm install │
534 +│ │
535 +│ Working directory │
536 +│ ~/dev/project │
537 +│ │
538 +│ [ Enter ] Allow once │
539 +│ [ A ] Always allow in this project │
540 +│ [ Esc ] Deny │
541 +╰───────────────────────────────────────────────────╯
542 +```
543 +
544 +- The interaction takes milliseconds: it appears already focused; three keys, no typing.
545 +- `A` shows the **generalized pattern** it will persist (`always allow: npm install *`) derived
546 + from conservative shell-word parsing; commands containing shell operators get exact-command
547 + approval only (ADR-9). Grants persist to project config.
548 +- For edits, the body shows the target path and a ≤ 8-line diff preview instead of a command.
549 +- Denial is recorded and fed to the model as steering (ADR-9); the panel closes instantly either
550 + way. While the panel is open the agent status line reads `● Waiting for permission`.
551 +
552 +### 9.2 Model selector — `/model`
553 +
554 +```
555 + ┌─ model ────────────────────────────────────────────┐
556 + current claude-sonnet-4-5 thinking adaptive
557 + ─────────────────────────────────────────────────
558 + ❯ claude-sonnet-4-5 default · fast
559 + claude-opus-4-5 deepest reasoning
560 + claude-haiku-4-5 cheapest · aux model
561 + ─────────────────────────────────────────────────
562 + t thinking: adaptive · o output budget: 16000
563 + └────────────────────────────────────────────────────┘
564 + ↑↓ select · Enter apply · t/o cycle · Esc close
565 +```
566 +
567 +Entries come from configuration/aliases (no hard-coded permanent list — CLAUDE.md §6); `t` cycles
568 +thinking mode, `o` cycles output budget. Applying updates the status bar immediately.
569 +
570 +### 9.3 `/config`
571 +
572 +Keyboard-navigable panel over the same config the file exposes (file remains editable directly):
573 +
574 +```
575 + ┌─ config ── ~/.khaelor/config.json · .khaelor/config.json ─┐
576 + ❯ Model claude-sonnet-4-5
577 + Thinking adaptive
578 + Max output 16000
579 + Permissions 12 rules →
580 + Theme khaelor-dark
581 + API key set via environment ✓
582 + └────────────────────────────────────────────────────────────┘
583 + ↑↓ navigate · Enter edit · p project scope · Esc close
584 +```
585 +
586 +Secrets are never displayed (`set via environment ✓` / `stored in keychain ✓`). `p` toggles
587 +whether an edit writes user (`~/.khaelor/config.json`) or project (`.khaelor/config.json`) scope,
588 +with the target shown before writing.
589 +
590 +### 9.4 `/sessions` picker
591 +
592 +```
593 + ┌─ sessions · ~/dev/my-project ───────────────────────────┐
594 + ❯ retry logic in session store 12m ago $0.42 main
595 + context compaction checkpoint 2h ago $1.13 main
596 + initial TUI scaffolding 1d ago $2.87 tui/shell
597 + └──────────────────────────────────────────────────────────┘
598 + ↑↓ select · Enter resume · n new · r rename · x delete · / filter · Esc
599 +```
600 +
601 +Titles, ages, costs, branches from real session metadata (§8, CLAUDE.md). Resuming replays the
602 +event log; the transcript reprints into scrollback as settled content.
603 +
604 +### 9.5 `/context` inspector
605 +
606 +```
607 + ┌─ context · 41,382 / 200,000 tokens · 21% ───────────────┐
608 + system prompt 3,120 ██
609 + project instructions 1,240 █
610 + conversation 24,988 ████████████
611 + tool observations 9,414 █████
612 + repository context 1,620 █
613 + checkpoint — (no compaction yet)
614 + reserved output 16,000 ████████
615 + ─────────────────────────────────────────────────────
616 + files in context
617 + src/session/store.ts read · turn 3
618 + src/context/engine.ts edited · turn 5
619 + └──────────────────────────────────────────────────────────┘
620 + Enter file detail · c compact now · Esc close
621 +```
622 +
623 +Every number from real usage/accounting (Absolute Rule #4). Bars are supplementary — numbers
624 +carry the information (§12). After compaction, the checkpoint row expands to show the structured
625 +YAML checkpoint on Enter.
626 +
627 +### 9.6 `/cost`
628 +
629 +```
630 + ┌─ cost · this session ───────────────────────────────────┐
631 + input tokens 182,455 $0.27
632 + output tokens 24,110 $0.18
633 + cache write 41,020 $0.08
634 + cache read 512,300 $0.08 (90% hit)
635 + ─────────────────────────────────────────────
636 + total $0.61
637 + └──────────────────────────────────────────────────────────┘
638 +```
639 +
640 +Exclusively from API usage metadata (ADR-10); cache health made visible (ADR-7). If pricing for
641 +the configured model is unknown, token counts show and the dollar column reads `n/a` — never an
642 +invented estimate.
643 +
644 +### 9.7 `/processes`
645 +
646 +```
647 + PROCESSES
648 + ● 3121 npm run dev running 04:32
649 + ● 3198 pytest running 00:18
650 + ○ 3012 npm test exited code 0
651 + ↑↓ select · Enter tail output · s stop · Esc close
652 +```
653 +
654 +`●` running / `○` exited (shape carries state, color reinforces). `Enter` prints the selected
655 +process's recent output as a settled block.
656 +
657 +---
658 +
659 +## 10. Streaming UX rules
660 +
661 +Binding rules for any renderer:
662 +
663 +1. **16 ms coalescing.** All deltas (text, thinking, tool output) batch into per-frame updates;
664 + one repaint per frame regardless of event rate (ADR-4).
665 +2. **No scroll jumps.** Settled content is appended above the live region; the live region is
666 + repainted in place. The viewport never leaps. If the user scrolls up in native scrollback,
667 + nothing repositions them — new content accumulates below, exactly like `tail -f`.
668 +3. **Stable input.** The composer and its caret are unconditionally repainted last and the cursor
669 + parks at the caret every frame. Typing latency is independent of stream rate (input events are
670 + processed before render batching; echo goes in the next frame, < 16 ms).
671 +4. **No flicker.** Synchronized-output frames (§1.3); per-row damage tracking; never
672 + clear-screen-and-redraw.
673 +5. **Thinking display** is compact: while the model emits permitted thinking, the status line
674 + reads `● Thinking · 4s`; a dim, cap-limited preview line may show beneath it. Thinking is never
675 + the centerpiece (CLAUDE.md §14).
676 +6. **Interruption — `Esc`.** Acknowledgment is *immediate* (same frame): status line flips to
677 + `◌ Stopping…` before any teardown completes. Then cancellation propagates
678 + (AbortSignal tree: model stream → in-flight tools → loop, ADR-11), dangling `tool_use` closed
679 + with synthetic cancelled results, and the partial output settles into scrollback marked:
680 +
681 +```
682 + ▸ Run npm test · cancelled · 3.2s
683 + ◌ Interrupted — partial response kept
684 +```
685 +
686 + Background `process` entries are untouched (ADR-11). `Esc` with an overlay open closes the
687 + overlay instead; `Esc` when idle with text in the composer clears selection/completion first
688 + (§13 precedence).
689 +
690 +---
691 +
692 +## 11. Status bar
693 +
694 +One row, bottom of screen, dim by default — subtle, persistent, never animated:
695 +
696 +```
697 + main +4 −1 │ claude-sonnet-4-5 │ context 31% │ $0.42 │ ● 2
698 +```
699 +
700 +Segments (all real data; a segment with no data is absent, not zeroed):
701 +
702 +| Segment | Source | Example |
703 +|---|---|---|
704 +| git branch + dirty counts | repo watcher | `main +4 −1` |
705 +| model | session config | `claude-sonnet-4-5` |
706 +| context utilization | real usage vs usable window (ADR-6) | `context 31%` |
707 +| session cost | API usage metadata | `$0.42` |
708 +| background processes | process registry | `● 2` |
709 +| queued steering (when any) | queue | `⋯ 1 queued` |
710 +
711 +**Width-responsive degradation** (Hermes' progressive disclosure, HERMES §8.2 — thresholds fixed
712 +now, tuned in Phase 8). Segments have priorities; lower-priority segments drop whole, never
713 +truncate mid-token:
714 +
715 +| Width | Shown |
716 +|---|---|
717 +| ≥ 100 | all segments |
718 +| 80–99 | model shortens to alias (`sonnet`); processes drop if none running |
719 +| 60–79 | cost drops → `main +4 −1 │ sonnet │ 31%` |
720 +| < 60 | `main │ 31%` |
721 +
722 +Context ≥ 80% tints the percentage warning and appends `· /compact` as a nudge; ≥ 90% error tint.
723 +Percentages, not bars, at this size.
724 +
725 +---
726 +
727 +## 12. Color and theming
728 +
729 +**One exceptional default theme** (`khaelor-dark`), `khaelor-light` variant, `/theme` deferred
730 +(CLAUDE.md §19).
731 +
732 +Palette philosophy — a vibrant, saturated system (per explicit product direction): every surface
733 +carries its own hue, hierarchy still comes from brightness and spacing, and monochrome loses zero
734 +meaning because state is never color-alone.
735 +
736 +| Role | Use | Dark value (truecolor) |
737 +|---|---|---|
738 +| text | body | `#d8dee9` |
739 +| dim | chrome, annotations, rules | `#6b7280` |
740 +| accent | `❯`, selection, active state | `#7aa2f7` |
741 +| violet | thinking state, model segment, gradient start | `#bb9af7` |
742 +| cyan | reading state, branch segment, gradient end | `#7dcfff` |
743 +| teal | searching state, context segment, process tools | `#73daca` |
744 +| magenta | verifying state | `#ff79c6` |
745 +| orange | cost segment, waiting state, numbers | `#ff9e64` |
746 +| success | `✓`, passed, added `+`, running state | `#9ece6a` |
747 +| warning | context pressure, shell mode `!`, editing state | `#e0af68` |
748 +| error | failed, removed `−` | `#f7768e` |
749 +
750 +Color deployment:
751 +
752 +- **Brand gradient** (violet→cyan, per-character truecolor interpolation): the startup wordmark,
753 + H1 headings, and the composer-box border when the agent is idle. Gradients only ever run over
754 + plain text; ANSI-256/16 degrade to solid violet, monochrome to identity.
755 +- **Agent states** each have a saturated color (status-line dot + label): thinking violet ·
756 + reading cyan · searching teal · editing amber · running green · verifying magenta · waiting
757 + orange. The word always accompanies the color.
758 +- **Tool one-liners**: the `▸` glyph is colored by tool family (read cyan · search violet · edit
759 + amber · exec green · process teal).
760 +- **Diffs**: `+`/`−` in success/error plus a subtle truecolor background tint per line; glyphs
761 + preserved for monochrome.
762 +- **Status bar**: each segment has its own accent (branch cyan · model violet · context teal →
763 + warning → error under pressure · cost orange · queued amber); separators stay dim.
764 +- **Panels** (permission, palettes): accent-dim borders instead of gray.
765 +- **Syntax highlighting**: keywords violet · strings green · numbers orange · functions cyan ·
766 + types teal-cyan · comments dim — a real palette derived from the theme.
767 +
768 +Rules:
769 +
770 +- **Capability ladder**: truecolor → ANSI-256 (quantized palette) → ANSI-16 (role-mapped) →
771 + monochrome. Detected via `COLORTERM`/terminfo.
772 +- **`NO_COLOR`** (and `TERM=dumb`) honored absolutely: full monochrome, everything still legible
773 + because **state is never color-alone** — every state pairs a symbol or word:
774 + `✓` done · `▸` tool · `●`/`○` running/stopped · `⋯` queued · `◌` interrupted · `+`/`−` diff ·
775 + `failed`/`passed` spelled out.
776 +- **Light/dark**: background detected via OSC 11 query with a 100 ms timeout (fallback:
777 + `COLORFGBG`, else assume dark); the matching variant is selected automatically. Both variants
778 + pass a contrast check (≥ 4.5:1 for text roles) in tests.
779 +- Syntax highlighting derives from the same palette, so code blocks belong to the theme instead
780 + of shouting over it. Vibrant ≠ noisy: saturation lives in small marks (glyphs, borders, labels,
781 + segments), never in body text.
782 +
783 +---
784 +
785 +## 13. Keyboard reference (complete, V1)
786 +
787 +Precedence: overlay bindings (modal) > single-key actions (only when composer empty) > composer
788 +bindings > global. A pushed overlay suppresses lower layers automatically (OpenCode's mode stack,
789 +OPENCODE §3.4) — no manual focus bookkeeping.
790 +
791 +### Global
792 +
793 +| Key | Action |
794 +|---|---|
795 +| `Esc` | Interrupt agent run · else close overlay · else clear completion/selection |
796 +| `Ctrl+K` | Universal command palette |
797 +| `Ctrl+T` | Cycle live tool detail (current turn) |
798 +| `Ctrl+C` | Clear composer; twice within 1 s quits |
799 +| `Ctrl+D` | Quit (empty composer only) |
800 +| `Ctrl+L` | Repaint live region (recover from external corruption) |
801 +| `Ctrl+Z` | Suspend (proper `renderer.suspend()` + restore on `SIGCONT`) |
802 +
803 +### Composer
804 +
805 +See §3.7 (character/word/line navigation, history, kill, undo, `$EDITOR`, `/`, `@`, `!`).
806 +
807 +### Single-key actions (composer empty; hinted inline where relevant)
808 +
809 +| Key | Action |
810 +|---|---|
811 +| `d` | Print diff of most recent edit |
812 +| `a` | (after shell mode output) add output to context |
813 +
814 +### Overlays / pickers (uniform)
815 +
816 +| Key | Action |
817 +|---|---|
818 +| `↑`/`↓` (`Ctrl+P`/`Ctrl+N`) | Navigate |
819 +| typing | Fuzzy filter |
820 +| `Enter` | Select / apply |
821 +| `Tab` | Complete without executing (slash palette) |
822 +| `Esc` | Close |
823 +
824 +### Permission panel
825 +
826 +`Enter` allow once · `A` always allow (project) · `Esc` deny (§9.1).
827 +
828 +### `/diff` viewer (alternate screen)
829 +
830 +`↑↓`/`j k` scroll · `PgUp/PgDn`/`Ctrl+U/Ctrl+D` half-page · `]`/`[` next/prev file · `Tab` file
831 +list · `u` unified/split toggle · `g`/`G` top/bottom · `q`/`Esc` close.
832 +
833 +All bindings are declared in the single command registry (§4.2) with name/title/category/key, so
834 +the palette lists them and a future rebinding config gets them for free. Kitty keyboard protocol
835 +and modifyOtherKeys are negotiated at startup for `Shift+Enter` and key-release fidelity;
836 +capability absence degrades to documented fallbacks, never broken keys.
837 +
838 +---
839 +
840 +## 14. Performance budget and measurement plan
841 +
842 +Budgets are release gates, measured — never asserted (CLAUDE.md §18; Absolute Rule #4).
843 +
844 +| Metric | Budget | Method |
845 +|---|---|---|
846 +| Cold start → editable prompt | < 150 ms p95 | `hyperfine 'khaelor --benchmark-startup'` (flag prints ready-timestamp and exits); CI-tracked |
847 +| Input echo latency | < 16 ms p95 | instrumented: keypress-read timestamp → frame-flush timestamp, recorded in-process under `--debug`; synthetic typing at 30 cps during a full-rate stream replay |
848 +| Live-region repaint | < 8 ms p95 (frame budget headroom) | per-frame timing histogram in debug log |
849 +| Stream throughput | no dropped frames at ≥ 2,000 tokens/s replay | recorded-event replay harness (§15.2) |
850 +| Memory, long session | < 150 MB RSS after 4 h / 500-message synthetic session; **flat slope** after settling | replay harness + periodic `process.memoryUsage()` samples |
851 +| Session resume (1,000-event log) | < 500 ms to interactive | benchmark on fixture logs |
852 +| Repository search (`@` mention, 50K-file repo) | first results < 100 ms | fixture repo benchmark |
853 +
854 +Instrumentation ships in the product behind `--debug` (histograms to `~/.khaelor/logs/perf.jsonl`)
855 +so dogfooding sessions produce real latency data continuously. When a budget is missed: attribute
856 +the layer first (model / network / fs / index / render / architecture), then optimize that layer —
857 +never guess (§18 speed rule).
858 +
859 +---
860 +
861 +## 15. Phase 2 framework spike
862 +
863 +### 15.1 The `RendererAdapter` seam
864 +
865 +The spike builds **one** UI core twice behind a deliberately thin adapter; everything above it
866 +(event bus consumption, markdown scanner, layout logic, key decoding policy) is shared:
867 +
868 +```ts
869 +interface RendererAdapter {
870 + mount(opts: { stdin: NodeJS.ReadStream; stdout: NodeJS.WriteStream }): void;
871 + /** Append an immutable, pre-rendered block to terminal scrollback. Never repainted. */
872 + printSettled(block: RenderedBlock): void;
873 + /** Repaint the bounded live region (streaming tail, status line, composer, status bar, overlay). */
874 + updateLive(state: LiveRegionState): void;
875 + onKey(handler: (key: KeyEvent) => void): void;
876 + onResize(handler: (size: { rows: number; cols: number }) => void): void;
877 + metrics(): RendererMetrics; // frame timings, bytes written, dropped frames
878 + unmount(): void;
879 +}
880 +```
881 +
882 +- **Candidate A — Ink 7**: `printSettled` → `<Static>` items; `updateLive` → the live component
883 + tree (status line, composer `<TextInput>`-equivalent, status bar); measure whether Ink's
884 + reconciler + Yoga stays inside budget for a ≤ 24-row tree and whether `<Static>` output remains
885 + byte-clean for selection/copy.
886 +- **Candidate B — custom ANSI**: `printSettled` → direct write above the live region;
887 + `updateLive` → damage-tracked row repaint inside DEC 2026 frames; the line editor is the main
888 + build cost — the spike implements the §3.7 navigation set only (spans/paste/`$EDITOR` deferred
889 + to Phase 2 proper).
890 +
891 +Spike scope cap: ~3 days per candidate. Shared harness first, then A, then B.
892 +
893 +### 15.2 The scenario (identical for both, replayed from a recorded event fixture)
894 +
895 +1. Stream a 10K-token markdown response (headings, tables, 3 fenced code blocks) at recorded-real
896 + and 4×-accelerated rates, through the settled-block scanner.
897 +2. 30 tool rows: start → live timer → settle; two overlapping with the text stream.
898 +3. Synthetic typing at 30 cps into the composer *during* the full-rate stream (echo latency
899 + measured per §14).
900 +4. Open/close the palette during streaming; show one permission panel.
901 +5. Resize 120→60→200 columns mid-stream.
902 +6. Long-session soak: 500 messages replayed, memory sampled.
903 +7. Manual flicker/selection pass on: Terminal.app, iTerm2, kitty, Alacritty, VS Code terminal, and
904 + inside tmux. Flicker check: eyeball + `asciinema` recording scrubbed frame-by-frame; selection
905 + check: select and copy a settled code block mid-stream, paste, diff against source.
906 +
907 +### 15.3 Decision criteria (pass/fail; all must pass to be eligible)
908 +
909 +| # | Criterion | Test |
910 +|---|---|---|
911 +| 1 | Flicker-free streaming | no visible tearing in scrubbed recordings on all 6 terminals |
912 +| 2 | Stable input line | caret never moves or blinks away during scenario 3 |
913 +| 3 | Input latency | < 16 ms p95 during full-rate stream (instrumented) |
914 +| 4 | Long-session memory | flat RSS slope after soak; < 150 MB |
915 +| 5 | Terminal-native selection/copy | copied settled block byte-identical (modulo trailing WS) |
916 +| 6 | Node-only | `npm i -g` on clean Node 22, no Bun, no native build step |
917 +| 7 | Resize integrity | no corrupted rows after scenario 5 |
918 +
919 +Tie-breakers if both pass: (1) measured margins on criteria 3–4, (2) lines of owned code the team
920 +must maintain, (3) estimated distance to Phase 2 composer completion, (4) startup cost added.
921 +
922 +### 15.4 Outcome handling
923 +
924 +- Both pass → recommendation (§0.3) applies its tie-breakers; expected outcome is **B**, accepted
925 + outcome may be **A**.
926 +- Only one passes → it wins, recorded as an ADR-14 addendum with the measurement tables.
927 +- Neither passes → the shared harness *is* the beginning of candidate B done more carefully; fix
928 + the failing criterion in B (it is the only candidate whose paint path we fully control).
929 +- The losing candidate's adapter is deleted, not kept "just in case". The `RendererAdapter` seam
930 + remains — it is also the seam the golden/snapshot tests (§21 of CLAUDE.md) render through.
931 +
932 +---
933 +
934 +## 16. Summary of positions taken
935 +
936 +| Question | Position |
937 +|---|---|
938 +| Conversation surface | Main-buffer terminal-native scrollback; settled content printed once, immutable |
939 +| Repaint surface | Bounded live region (≤ ~24 rows), DEC 2026 synchronized frames, 16 ms coalescing |
940 +| Alternate screen | Only for the `/diff` full viewer (pager semantics) |
941 +| Framework | Spike between Ink 7 (Static + bounded live tree) and custom ANSI renderer; **custom renderer recommended** |
942 +| Markdown streaming | Hermes settled-block scanning: raw tail live, blocks rendered once when settled |
943 +| Tool calls | Collapsed one-liners; live-turn toggle `Ctrl+T`; post-hoc expansion prints blocks (`d`, `/tool n`) |
944 +| Overlays | In-live-region bounded panels; one generic filter-list powers all pickers; one command registry powers keys + palette + slash |
945 +| Status | One agent status line (real data only) + one width-degrading status bar |
946 +| Honesty | Every number from real events/usage; segments absent rather than faked; no spinner theater |
947 +| Accessibility | Symbols + words always accompany color; NO_COLOR fully supported; keyboard-complete |
948 +
949 +---
950 +
951 +*Author: Simon-Pierre Boucher · contact@spboucher.ai*
added docs/research/COMPARATIVE_ARCHITECTURE.md +214 −0
@@ -0,0 +1,214 @@
1 +<!--
2 +KHAELOR
3 +File: docs/research/COMPARATIVE_ARCHITECTURE.md
4 +Author: Simon-Pierre Boucher
5 +Contact: contact@spboucher.ai
6 +-->
7 +
8 +# Comparative Architecture — Hermes · OpenCode · OpenHands · mini-SWE → KHAELOR
9 +
10 +> Phase 0 synthesis. Sources: `docs/research/HERMES_ANALYSIS.md`, `OPENCODE_ANALYSIS.md`, `OPENHANDS_ANALYSIS.md`, `MINI_SWE_ANALYSIS.md` — all based on traced code paths, not READMEs. Every claim below cites the evidence recorded in those documents. Decisions are elaborated as ADRs in `KHAELOR_ARCHITECTURE_DECISIONS.md`.
11 +
12 +---
13 +
14 +## 1. Decision Matrix
15 +
16 +| Capability | Hermes | OpenCode | OpenHands | mini-SWE | KHAELOR Decision |
17 +|---|---|---|---|---|---|
18 +| **Agent loop** | 7,740-line `while` loop; typed error hints; verification-on-stop | State-derived `runLoop` over persisted messages; stream reducer split out | `Agent.step()` + `run()` state machine; `FinishTool`; buried under integrations | 190-line loop; exceptions-carry-messages; `role=="exit"` | Tiny state-derived loop (mini shape, OpenCode crash-safety); services around it (ADR-2) |
19 +| **TUI** | Python REPL + React/Ink TUI + JSON-RPC bridge; settled-block streaming | SolidJS + own `@opentui` engine; 16 ms delta coalescing; 100-msg cap | None (web app; Rich debug visualizer) | Rich prints; spinner | Phase 1 prototype spike; techniques (settled blocks, coalescing, bounded live region) adopted regardless (ADR-14) |
20 +| **Tools** | ~93 tools + `tool_search` bridge | 2–4 params, prose-rich descriptions; 9-replacer edit; spill-to-file | Typed Action/Observation; str_replace with line-number errors | One `bash` tool | Exactly 7 primitives; ≤5 params; replacer cascade + OpenHands failure UX (ADR-8) |
21 +| **Sessions** | SQLite, 10.9K-line armor, mid-turn flush | SQLite + drizzle; events → atomic projections | File-per-event JSON; event *tree*; resume contract | JSON dump per step; write-only | Event-sourced JSONL, one file/session; resume = replay; linear log, `parent_id`-ready (ADR-3) |
22 +| **Context** | `ContextEngine` ABC; 3-tier cached system prompt; token-triggered compressor | Token-budget overflow; compaction as persisted loop task; cheap prune | Condenser; compaction-as-event; safe cut indices; event-count trigger (weak) | None; template head/tail truncation | Hermes interface + OpenHands compaction-as-event + real-token triggers + structured YAML checkpoint (ADR-6, ADR-7) |
23 +| **Memory** | MEMORY.md/USER.md + provider plugins + background review agent | None (frecency for UI ranking only) | Microagents/skills systems (out of core) | None | **Not V1**; event-log seams left open (ADR-16) |
24 +| **Permissions** | Layered gate; unbypassable hardline floor; LLM guardian | Last-match-wins rules; tree-sitter + arity "always allow `git push *`"; in-memory `always` (flaw) | Risk/policy split; pending = unmatched action events | Mode + regex whitelist | Capability rules, last-match-wins; persisted `always`; conservative bash parsing V1 (ADR-9) |
25 +| **Workspace** | Env backends for terminal only; file tools hit FS directly | None explicit; directory-scoped instances | `BaseWorkspace`; sandbox = relocate the agent | 3-method `Environment` protocol | 4-method `Workspace`; `LocalWorkspace` only; tools never touch Node globals (ADR-13) |
26 +| **Events** | ~40-event gateway protocol; 33 ms coalescing | Durable typed events + atomic projectors; `GlobalBus` | Event log as source of truth; `visualize` welded on (wart) | None (message list is the log) | In-process typed bus; durable → JSONL, ephemeral deltas → TUI only (ADR-4) |
27 +| **Subagents** | `delegate_task`, in-process threads, no parent context | `task` → child session; deny-rule inheritance; depth 1 | Delegate tooling in SDK | None — and >74% SWE-bench anyway | **Not V1** (ADR-16) |
28 +| **Processes** | `terminal` + `process` registry: best-in-class | Gap: PTY exists, no model-facing tool | Soft-timeout terminal + `is_input` convention | Fresh subshell, 30 s kill | Model-facing `process.start/list/read/write/stop` — the differentiator (ADR-8) |
29 +| **Model abstraction** | OpenAI-dict lingua franca + adapter zoo + credential pools | `ai` SDK + per-provider transforms | 2,300-line litellm wrapper; typed error taxonomy | 164-line litellm wrapper | One `ModelClient` over Anthropic SDK; typed errors; no adapter framework (ADR-10) |
30 +| **Persistence** | SQLite WAL + fallbacks + self-repair | SQLite WAL; JSON-blob payloads; ULID ids; incremental counters | FileStore, file-per-event, lock file, autosave | `finally`-block JSON dump | Append-only JSONL, atomic line appends, flush at every loop boundary (ADR-3) |
31 +| **Git awareness** | Verify pipeline detects changed files | Shadow-git snapshots; revert/unrevert; per-step patch parts | `sdk/git` diff/changes helpers feed UI | None | Baseline capture + attribution; shadow-git deferred post-V1 (ADR-15) |
32 +| **Repository search** | grep tools; output budgets | Bundled ripgrep service; 100-result cap; frecency file-finding | ripgrep-first with logged fallback | Model runs `grep` itself | ripgrep-first, bounded structured results; trust the model to navigate; no index in V1 (ADR-8, §11) |
33 +
34 +---
35 +
36 +## 2. Capability Analyses
37 +
38 +### 2.1 Agent loop
39 +
40 +**Problem.** Turn a user request into a sequence of model calls and tool executions that terminates correctly, survives crashes, and stays comprehensible.
41 +
42 +**How each reference solves it.**
43 +- *Hermes*: `run_conversation()` in `agent/conversation_loop.py` — one ~6,000-line loop body. Iteration budget with a "grace call", typed `ClassifiedError` recovery hints, dozens of inline `# ──` recovery regions, and **verification-on-stop** (`agent/verification_stop.py`): a model claiming completion after editing code gets a synthetic evidence-bearing nudge to run verify commands (max 2 attempts, withheld answer preserved).
44 +- *OpenCode*: `SessionPrompt.runLoop` re-reads persisted messages **each iteration** and derives what to do from them; compaction and subtasks are persisted parts popped as tasks; exit conditions derive from message state, so a crashed process resumes mid-conversation. The stream reducer (`SessionProcessor`, a pure event switch) is separated from the loop. Doom-loop detection: 3 byte-identical consecutive tool calls → ask the user.
45 +- *OpenHands*: `Agent.step()` is one LLM round dispatched through `classify_response()`; the outer `LocalConversation.run()` is a status state machine (`IDLE/RUNNING/PAUSED/WAITING_FOR_CONFIRMATION/FINISHED/STUCK`). Completion is an explicit `FinishTool` call. The minimal loop is buried under MCP reconciliation, critics, hooks, and vision fallbacks (~28-parameter `__init__`).
46 +- *mini-SWE*: `DefaultAgent` (190 lines): `run()` → `step()` → `execute_actions(self.query())`. All non-linear control flow is exceptions carrying the messages to append; termination is data-driven (`role == "exit"`). Scores >74% on SWE-bench Verified.
47 +
48 +**Trade-offs.** mini proves the kernel can be tiny but omits everything a product needs (streaming, resume, compaction). Hermes proves rich recovery works but shows what happens when it lives *inside* the loop. OpenCode's state-derivation buys crash-safety and steerability at the cost of per-iteration state reads. OpenHands' explicit state machine is legible but its kernel accreted integrations — the exact failure Absolute Rule #3 guards against.
49 +
50 +**KHAELOR.** mini's four-verb shape + OpenCode's state-derivation + Hermes' verification-on-stop, with error *handling* in a policy service outside the loop (Hermes proves the taxonomy; KHAELOR fixes the placement). See ADR-2, ADR-12.
51 +
52 +### 2.2 TUI
53 +
54 +**Problem.** Render streaming model output, tool activity, diffs, and input editing in a terminal, flicker-free, at full token-stream speed.
55 +
56 +**How each reference solves it.**
57 +- *Hermes*: paid the Python-first tax — an 18.7K-line prompt_toolkit REPL *plus* a React/vendored-Ink TUI *plus* a Python↔Node JSON-RPC bridge. Its `ui-tui/` rendering discipline is excellent: settled-block incremental markdown (`StreamScanState` freezes completed blocks, re-parses only the live tail), hard live-render caps (16K chars / 240 lines — unbounded trails OOM-killed Node, issue #34095), virtualized scrollback, width-responsive status segments with pre-reserved spinner width, 33 ms delta coalescing.
58 +- *OpenCode*: built its own engine — SolidJS fine-grained reactivity over `@opentui`'s retained-mode renderable tree (Yoga flexbox → optimized cell buffer, 60 fps target). Delta-only streaming: `message.part.delta` → `produce()` append → single `<markdown>` node repaint; SSE events coalesced 16 ms into `batch()`. No virtualization — a hard 100-message cap with part GC (users silently lose scrollback). Composer is extmark-based structured parts; native `<diff>` renderable; tree-sitter WASM highlighting.
59 +- *OpenHands*: **no terminal product.** A React/Electron web app; events carry a Rich `visualize` property (presentation welded into domain objects — an anti-pattern).
60 +- *mini-SWE*: Rich prints and a spinner; honest about being a research harness. Its interaction grammar (Ctrl-C → steering comment, "agent wants to finish" → prompt for next task) is worth preserving.
61 +
62 +**Trade-offs.** Framework choice is the highest-variance decision: Ink is Node-native but coarse-grained; opentui is the best-in-class renderer but Bun-adjacent; custom ANSI is fully controlled but expensive. The *techniques*, however, converge across Hermes and OpenCode independently (settled blocks, coalescing, bounded live regions) — they are framework-independent facts about terminals.
63 +
64 +**KHAELOR.** The one decision requiring a Phase 1 prototype spike, with measured criteria; techniques adopted regardless of framework. No 100-message UX cliff. See ADR-14.
65 +
66 +### 2.3 Tools
67 +
68 +**Problem.** Give the model action primitives that are powerful, observable, safe, and cheap in context.
69 +
70 +**How each reference solves it.**
71 +- *Hermes*: ~93 registered tools (browser, video, TTS, kanban…), requiring a `tool_search` deferred-tool bridge to cope with its own count. But its tool-output economics are exemplary: per-result (100K chars) + per-turn (200K) budgets, head/tail truncation with explicit markers, spill-to-file with the path returned, ANSI stripping, secret redaction.
72 +- *OpenCode*: minimal schemas — `edit` has 4 params, `bash` 3; long guidance lives in description text files. The edit tool runs a **nine-strategy replacer cascade** (exact → line-trimmed → block-anchor Levenshtein → whitespace-normalized → indentation-flexible → escape-normalized → trimmed-boundary → context-aware → multi-occurrence) with uniqueness and disproportionate-match guards, CRLF/BOM preservation, and model-facing repair-prose errors. `Truncate.output` spills oversized output to files the model can Read/Grep.
73 +- *OpenHands*: typed Pydantic Action/Observation pairs per tool; `ToolAnnotations` behavior hints (`readOnlyHint` short-circuits risk checks). The str_replace editor's failure UX is the reference standard: multiple-occurrence errors cite line numbers, "Maybe you meant {cwd/path}?", post-edit snippet so the model self-verifies without a re-read.
74 +- *mini-SWE*: **one tool** (`BASH_TOOL`, one required param) scores >74% — proof that big agents' tool *counts* are largely accidental. But bash-only editing (`sed`/heredocs) is unobservable and unsafe outside disposable containers.
75 +
76 +**Trade-offs.** More tools = more schema tokens per call and more permission surface; fewer tools = less observability (no diffs, no capability classification). The evidence triangulates on ~7 powerful primitives with tiny schemas.
77 +
78 +**KHAELOR.** Exactly `read/write/edit/grep/glob/bash/process`. OpenCode's cascade + OpenHands' failure messages + Hermes' output budgeting. See ADR-8.
79 +
80 +### 2.4 Sessions
81 +
82 +**Problem.** Sessions must persist across crashes and restarts, resume with full fidelity, and stay separate from agent intelligence.
83 +
84 +**How each reference solves it.**
85 +- *Hermes*: SQLite with hard-won operational armor (`hermes_state.py`, 10,888 lines): WAL with broken-build detection and DELETE-mode fallback, macOS fsync barriers, schema self-repair, incremental mid-turn flushes so a crash loses almost nothing.
86 +- *OpenCode*: SQLite + drizzle; **persistence is a projection of durable events** — `updateMessage`/`updatePart` never touch the DB, they publish events; projectors run in the same transaction. ULID-style monotonic IDs make `ORDER BY id` = insertion order.
87 +- *OpenHands*: **one JSON file per event** (`events/event-{idx}-{id}.json`), append-only, lock-file cross-process safety, lazy load, O(1) length. Events carry `parent_id` — the conversation is a *tree* (branch/rewind for free), paid for with sentinel/legacy-fallback debt (issues #4057, #3053). `AgentBase.verify()` gives a precise resume contract: same agent class, tools add-only.
88 +- *mini-SWE*: full-state JSON dump in a `finally` block every step — crash-safe *recording*, but write-only: no resume path exists.
89 +
90 +**Trade-offs.** SQLite gives transactions and queries but adds a native dependency and (Hermes shows) an armor tax. File-per-event is dependency-free but inode-heavy. Trees enable rewind but cost invariant complexity.
91 +
92 +**KHAELOR.** Append-only JSONL, one file per session — no DB dependency, no inode storm, atomic line appends; resume = replay; linear V1 log with schema room for `parent_id`. mini's `finally`-discipline applied at every loop boundary. See ADR-3.
93 +
94 +### 2.5 Context
95 +
96 +**Problem.** Long sessions exceed the context window; the model must receive the right information, and compaction must not corrupt API invariants or destroy evidence.
97 +
98 +**How each reference solves it.**
99 +- *Hermes*: the best-factored component in its codebase — `ContextEngine` ABC separating `select_context` / `compress` / `on_turn_complete` / `prune_tool_results_only`, fed by **real API usage tokens** (`update_from_response`). Default compressor: prune tool results (cheap, no LLM) → protect head → protect recent tail by token budget → summarize the middle on an auxiliary model → iteratively update the summary, with anti-thrash guards and per-turn attempt caps.
100 +- *OpenCode*: `isOverflow()` compares real usage tokens against `usable()` (input limit minus a reserved 20K buffer); when a step overflows, a `compaction` task **part is persisted** and the loop processes it next iteration via a hidden compaction agent. Separate cheaper `prune()` blanks old tool outputs (protect newest 40K tokens) marked `time.compacted`.
101 +- *OpenHands*: the cleanest structural insight — **a `Condensation` is an event in the log**; the `View` projection re-applies it deterministically on every rebuild, cutting only at `manipulation_indices` where tool_use/tool_result pairing survives; condensation doubles as the *recovery path* for context-window errors. Weakness: the default trigger is **event count** (240), not tokens.
102 +- *mini-SWE*: none — `ContextWindowExceededError` aborts the run; the only management is template-level head/tail truncation of tool output (which is, notably, the cheap first 80%).
103 +
104 +**Trade-offs.** Compaction-in-memory (Hermes mutates the stored list, its one sanctioned cache-break) vs compaction-as-event (OpenHands: replay-deterministic, inspectable, un-condensable). Event-count triggers are simple but blind; token triggers require honest accounting.
105 +
106 +**KHAELOR.** Hermes' interface verbs + OpenHands' compaction-as-event mechanics + token triggers from real usage + KHAELOR's structured YAML checkpoint as the summary payload. Prune first, summarize second. See ADR-6, ADR-7.
107 +
108 +### 2.6 Memory
109 +
110 +**Problem.** Knowledge that should survive across sessions.
111 +
112 +**How each reference solves it.** *Hermes* is the only serious implementation: MEMORY.md/USER.md frozen-snapshot injection (cache-conscious), a pluggable provider ABC (one external provider max), and a background review agent (forked, tool-whitelisted, cache-warm, cancelled by any new live turn) — ~10K+ lines including skills machinery. *OpenCode*: none (frecency ranks UI autocomplete only). *OpenHands*: microagents/skills exist as extension systems interleaved with the core. *mini-SWE*: none — and still scores >74%, evidence this layer is unnecessary for coding performance today.
113 +
114 +**Trade-offs.** Memory pays off for a *personal* agent across months; it costs cache-stability discipline (Hermes freezes snapshots, accepting that mid-session writes are invisible until next session) and a large safety/curation apparatus.
115 +
116 +**KHAELOR.** Not V1 (CLAUDE.md §23). The event log and kernel service boundaries leave the seam open; adopt Hermes' lessons (aux model, frozen snapshot, cancellable background work) when the time comes. See ADR-16.
117 +
118 +### 2.7 Permissions
119 +
120 +**Problem.** Let the agent act autonomously while keeping destructive or unusual actions visible and consented to — without nagging.
121 +
122 +**How each reference solves it.**
123 +- *Hermes*: a nine-layer command gate (`check_all_command_guards`): an **unbypassable hardline floor** matched against de-obfuscated command variants (even in yolo mode), deny globs, an external analyzer binary, ~47 regex patterns, an LLM guardian, then the human — with "silence is not consent" timeout semantics. The permanent allowlist refuses commands containing shell operators.
124 +- *OpenCode*: the elegance benchmark — rules are `{permission, pattern, action}` triples, **evaluation is a 4-line `findLast`** with wildcard matching; capability-ish keys (`write` folds into `edit`); deny rules also *derive tool visibility* (plan mode = permission policy, not a different agent). Bash commands are tree-sitter-parsed and an **arity dictionary** generates precise "always allow `git push *`" suggestions; filesystem verbs trigger `external_directory` checks. Flaw: v1 `always` approvals are in-memory per session — users re-approve after restarts. Rejection-with-feedback becomes model steering (`CorrectedError`).
125 +- *OpenHands*: clean **risk/policy separation** — analyzer produces `SecurityRisk` (UNKNOWN incomparable; analysis errors default HIGH), policy decides confirm-or-not; pending approval = unmatched ActionEvents persisted in the log, so approvals survive restarts. Default analyzer is the model grading its own homework (schema-injected `security_risk` self-assessment).
126 +- *mini-SWE*: mode (`human/confirm/yolo`) + regex whitelist, ~10 lines — right-sized evaluator, wrong model for a product (no persistence, no scoping).
127 +
128 +**Trade-offs.** Regex armories are brittle primary defenses (Hermes); deterministic capability rules are predictable but need good generalization UX (OpenCode's arity) to avoid prompt fatigue; LLM self-assessment is cheap but unsound as the gate.
129 +
130 +**KHAELOR.** Capability-based rules, last-match-wins evaluator, persisted `always` grants (fixing OpenCode's flaw), conservative shell-word parsing for V1 suggestions, elegant inline panel. See ADR-9.
131 +
132 +### 2.8 Workspace
133 +
134 +**Problem.** One seam between the agent and "the world" so remote/sandboxed execution stays possible without proxying every syscall through premature abstraction.
135 +
136 +**How each reference solves it.** *Hermes*: a clean `Environment` backend layer for terminal execution only (local/Docker/SSH/Modal…) — but file tools touch the local FS directly; the world is not one seam. *OpenCode*: no explicit workspace object; instances are directory-scoped server-side. *OpenHands*: `BaseWorkspace` (working_dir + execute/upload/download) — but tools *also* bypass it, opening files directly; sandboxing works by **relocating the whole agent** into the container (agent-server inside Docker) rather than proxying ops. *mini-SWE*: a 3-method `Environment` protocol; local↔Docker↔Singularity swaps cost ~100–150 lines each with zero kernel changes.
137 +
138 +**Trade-offs.** Per-op proxying is clean but slow and invasive; relocate-the-agent is fast but demands a server stack. The OpenHands evidence says: keep the interface *thin* so the future remote strategy can be "run KHAELOR's core remotely," not "proxy every syscall."
139 +
140 +**KHAELOR.** The 4-method `Workspace` from CLAUDE.md §9; `LocalWorkspace` only; tools depend on `Workspace`, never on Node globals directly. See ADR-13.
141 +
142 +### 2.9 Events
143 +
144 +**Problem.** One truthful stream that the UI, persistence, and resume/replay all consume — so streaming, history, and state never diverge.
145 +
146 +**How each reference solves it.** *Hermes*: a ~40-event typed gateway protocol (message/thinking/tool/subagent/approval events) over JSON-RPC with 33 ms delta coalescing — but it exists to bridge two languages. *OpenCode*: the spine — `EventV2` typed pub/sub where definitions can be **durable** (`{durable: {aggregate, version}}`); publishing a durable event transactionally appends it to the log *and* runs projectors; UI, DB, and remote clients consume the same stream. *OpenHands*: the event log is the single source of truth; everything the LLM sees and the UI shows is a projection — but presentation (`visualize` → Rich Text with emoji) is welded onto domain events. *mini-SWE*: none; the message list is the log — viable only with one linear consumer and no streaming.
147 +
148 +**Trade-offs.** Durable/ephemeral distinction matters: persisting every text delta would bloat the log; dropping deltas entirely breaks streaming UX. Both OpenCode (16 ms) and Hermes (33 ms) independently converged on coalescing deltas into batched renders.
149 +
150 +**KHAELOR.** In-process typed bus with the CLAUDE.md §7 vocabulary; durable events → JSONL log; ephemeral deltas → TUI only, coalesced ~16 ms; rendering strictly outside event types. See ADR-4, ADR-5.
151 +
152 +### 2.10 Subagents
153 +
154 +**Problem.** Delegate scoped work with isolation, without recursive explosions.
155 +
156 +**How each reference solves it.** *Hermes*: one `delegate_task` tool, in-process daemon-thread children inheriting parent toolsets (never model choice), **zero parent context** (bare goal+context string), depth 1 by default, push-not-poll result delivery. *OpenCode*: `task` spawns a child *session* (fresh context by design); only parent **deny** rules propagate; `task`/`todowrite` force-denied for children; `subagent_depth` default 1. *OpenHands*: delegate tooling exists in the SDK amid six extension systems. *mini-SWE*: none — plus a strong model plans in-context to >74%; strong evidence orchestration layers are accidental complexity at current model capability.
157 +
158 +**Trade-offs.** Fresh-context children are cheap and safe but poor for "continue this refactor" delegation (Hermes' own weakness). Any subagent system multiplies permission, budget, and UI surface.
159 +
160 +**KHAELOR.** Not V1. Events already carry a session id and the tool registry is data-driven, so child sessions bolt on later without kernel rewrites. See ADR-16.
161 +
162 +### 2.11 Processes
163 +
164 +**Problem.** Dev servers, watchers, and REPLs must run *while the agent keeps working* — blocking bash makes them impossible.
165 +
166 +**How each reference solves it.** *Hermes*: the best implementation surveyed — `terminal` (foreground, 180 s default / 600 s hard cap that *redirects* long commands to background) + `process` (`list/poll/log/wait/kill/write/submit/close`), a singleton registry with 200K-char rolling buffers, 64-process LRU cap, crash checkpoints with PID-reuse guards, and completion-notification events with rate limiting. *OpenCode*: **the gap** — PTY and background-job infra exist for clients, but the model cannot start/inspect/stop long-running processes; dev-server workflows degrade to blocking bash. *OpenHands*: one persistent terminal with a **soft-timeout convention** (`exit_code = -1` "still running", `is_input` keystrokes) the model must learn from prose. *mini-SWE*: fresh subshell per command, 30 s process-group SIGKILL; long-running processes are impossible.
167 +
168 +**Trade-offs.** A single soft-timeout terminal is fewer tools but an implicit contract; an explicit process manager is more schema but honest and observable.
169 +
170 +**KHAELOR.** Strict `bash` vs `process` split; model-facing `process.start/list/read/write/stop` — Hermes validates the design almost line for line, and neither TS reference gets it right. This is a genuine differentiator. See ADR-8.
171 +
172 +### 2.12 Model abstraction
173 +
174 +**Problem.** Talk to the model reliably: streaming, retries, typed errors, honest usage accounting, cancellation.
175 +
176 +**How each reference solves it.** *Hermes*: OpenAI-dict lingua franca + adapters for every provider + credential pools + failover chains — provider sprawl is its single largest complexity driver, leaking sanitizers throughout the loop. *OpenCode*: Vercel `ai` SDK + per-provider transforms + model-family prompt files — generality tax spread through the model layer. *OpenHands*: a 2,300-line litellm wrapper (four near-duplicate call paths) — but with the key idea intact: provider chaos mapped to a **typed exception taxonomy** (`LLMContextWindowExceedError`, …) that the loop branches on, and cost/cache tokens taken exclusively from real API metadata. Streaming is bolted on and silently degrades to off. *mini-SWE*: 164-line litellm wrapper; auto cache-control for Anthropic-looking models; **hard failure when cost cannot be computed**.
177 +
178 +**Trade-offs.** Every reference pays a universal-adapter tax KHAELOR's Anthropic-only mandate amputates. The transferable parts are exactly three: typed errors, real usage accounting, cache-control planning.
179 +
180 +**KHAELOR.** One `ModelClient` over the official Anthropic SDK; typed retryable/fatal/context-overflow taxonomy; AbortSignal cancellation; streaming first-class. See ADR-5, ADR-10.
181 +
182 +### 2.13 Persistence
183 +
184 +**Problem.** Never lose work — including mid-turn — without a heavy storage stack.
185 +
186 +**How each reference solves it.** *Hermes*: incremental mid-turn SQLite flushes after every tool result; WAL fallbacks; schema self-repair; disk-full classification surfaced to the user. *OpenCode*: SQLite/WAL with JSON-blob payload columns, incremental token/cost counters maintained by delta at write time, keyset pagination. *OpenHands*: FileStore file-per-event + `base_state.json` with autosave-on-mutation; idempotent init (skip if a SystemPromptEvent already exists). *mini-SWE*: serialize everything in a `finally` block every iteration — durability in one line.
187 +
188 +**Trade-offs.** DBs buy queries and transactions at the cost of native deps and armor code; plain files buy simplicity at the cost of hand-rolled atomicity and derived-state rebuilds.
189 +
190 +**KHAELOR.** JSONL append with atomic line writes, flushed at every loop boundary (mini's discipline); derived metadata always rebuildable from the log. See ADR-3.
191 +
192 +### 2.14 Git awareness
193 +
194 +**Problem.** Protect user work: know what the agent changed vs what the user had, and never destroy either.
195 +
196 +**How each reference solves it.** *Hermes*: the verify pipeline detects files changed per turn (feeding verification-on-stop) but has no baseline-protection story. *OpenCode*: the standout — **shadow-git snapshots**: a separate git dir operated against the real work tree (`objects/info/alternates` pointing at the real object DB + copied index = near-free seeding even on Chromium-sized repos), `write-tree` hashes stored in step parts, powering revert/unrevert and the diff viewer, invisible to `git status`. *OpenHands*: `sdk/git` diff/changes helpers feed the UI diff panel. *mini-SWE*: nothing.
197 +
198 +**Trade-offs.** Shadow git is powerful but nontrivial machinery (orphan repos, index copying, size filters); baseline recording (branch, dirty files, diff hash) delivers the §16 protection guarantees with a fraction of the code.
199 +
200 +**KHAELOR.** Baseline capture at session start and before first edit; explicit attribution; never auto-commit. Shadow git is the strongest post-V1 candidate on the list. See ADR-15.
201 +
202 +### 2.15 Repository search
203 +
204 +**Problem.** Understand a repository without stuffing it into context or maintaining a stale index.
205 +
206 +**How each reference solves it.** *Hermes*: grep-style tools under strict output budgets; progressive disclosure (index-in-prompt, bodies on demand) proven on its skills corpus. *OpenCode*: a bundled ripgrep service behind `grep`/`glob`, hard 100-result caps with explicit truncation notices, and server-side fuzzy file finding with frecency ranking for `@` mentions. *OpenHands*: ripgrep-first with an explicit logged fallback to system grep; bounded structured observations. *mini-SWE*: no tooling at all — the model runs `ls`/`grep`/`find` itself and navigates repositories *well*, at the cost of repeated token-burning discovery.
207 +
208 +**Trade-offs.** Indexes (AST, embeddings) go stale and cost maintenance; honest search primitives never lie. mini demonstrates the model needs less retrieval help than agent frameworks assume.
209 +
210 +**KHAELOR.** ripgrep-first `grep`/`glob` with bounded structured results; filesystem map + git state via the Context Engine; frecency-ranked file mentions in the TUI. No AST/embeddings/symbol index in V1 (CLAUDE.md §11).
211 +
212 +---
213 +
214 +*Author: Simon-Pierre Boucher · contact@spboucher.ai*
added docs/research/HERMES_ANALYSIS.md +350 −0
@@ -0,0 +1,350 @@
1 +<!--
2 +KHAELOR
3 +File: docs/research/HERMES_ANALYSIS.md
4 +Author: Simon-Pierre Boucher
5 +Contact: contact@spboucher.ai
6 +-->
7 +
8 +# Hermes Agent — Deep Architecture Analysis
9 +
10 +> **Reference:** `references/hermes-agent` (NousResearch/hermes-agent)
11 +> **Snapshot analyzed:** commit `1527a81b5eee6631e5bbec8d7fb0ce69db6a166d` (2026-07-27), version `0.20.0` (`pyproject.toml`)
12 +> **Method:** traced real code paths — agent loop, tool registry, session state, render loop, permission checks, context construction, process execution, persistence. All claims cite file paths (relative to the repo root) and symbol names.
13 +> **Purpose:** Phase 0 research input for KHAELOR architecture decisions.
14 +
15 +---
16 +
17 +## 1. What Hermes Is, and Its Scale
18 +
19 +Hermes is a Python "personal AI agent" that runs **one agent core across many surfaces**: a prompt_toolkit CLI, ~20 messaging-platform gateways (Telegram, Discord, Slack, …), a React/Ink TypeScript TUI, and an Electron desktop app. It supports dozens of model providers, cross-session memory, a self-improving skills library, subagent delegation, cron jobs, browser automation, voice, and remote execution sandboxes.
20 +
21 +The scale is the first finding. This is an enormous codebase:
22 +
23 +- ~1.54M lines of Python (including tests), plus ~87K lines of TS/Python in `ui-tui/` + `tui_gateway/`.
24 +- `cli.py` is **18,700 lines**. `run_agent.py` is **8,299 lines** (the `AIAgent` class starts at line 412 and runs most of the file). `agent/conversation_loop.py` is **7,740 lines**, most of it a single `while` loop. `hermes_state.py` (persistence) is **10,888 lines**. `agent/context_compressor.py` is **7,386 lines**.
25 +- ~93 `registry.register(...)` calls in `tools/` — the model-facing tool surface includes web search, browser automation (12+ tools), video generation (6 BFL FLUX tools), TTS, vision, kanban, cron, and more (`toolsets.py::_HERMES_CORE_TOOLS`).
26 +
27 +Hermes' own `AGENTS.md` names its two governing invariants, both of which are visible everywhere in the code:
28 +
29 +1. **"Per-conversation prompt caching is sacred."** Anything that mutates past context or rebuilds the system prompt mid-session is forbidden (the sole exception is compaction).
30 +2. **"The core is a narrow waist; capability lives at the edges."** New model tools are the expensive exception; capability should arrive as skills, plugins, or gated tools.
31 +
32 +The irony — and the central lesson for KHAELOR — is that the *stated* philosophy is excellent while the *implementation* of the core has accreted into god-files that the project itself acknowledges (its `AGENTS.md` explicitly invites "refactor god-files into clean modules" PRs against `cli.py` / `run_agent.py` / `gateway/run.py`).
33 +
34 +---
35 +
36 +## 2. Agent Loop
37 +
38 +### 2.1 Where it lives
39 +
40 +- **Central agent class:** `AIAgent` in `run_agent.py:412`. It owns the model clients, session state, interrupt flags, memory store, context engine, checkpoint manager, and ~400 methods.
41 +- **The loop itself:** `run_conversation(agent, user_message, ...)` in `agent/conversation_loop.py:1422`. One user turn = one call. Per-turn setup (the "prologue") is extracted into `build_turn_context()` (`agent/turn_context.py`): stdio guarding, retry-counter resets, message sanitization, todo hydration, system-prompt restore-or-build, preflight compression, plugin `pre_llm_call` hooks, external-memory prefetch, and crash-resilience persistence.
42 +- **Loop shape:** `while (api_call_count < agent.max_iterations and agent.iteration_budget.remaining > 0) or agent._budget_grace_call:` (`conversation_loop.py:1634`). Each iteration: drain pending redirect/steer → repair/sanitize history → clone messages into `api_messages` → apply context-engine selection + prompt-cache markers → API call → classify outcome → execute tool calls or finish.
43 +- **Budgets:** `agent/iteration_budget.py::IterationBudget` — thread-safe consume/refund counter; parent default 500 iterations, subagents 50 (`delegation.max_iterations`). A "grace call" lets the model produce one final answer after exhaustion; `agent/turn_finalizer.py::finalize_turn` otherwise makes one extra tool-less API call asking the model to summarize (`_handle_max_iterations`).
44 +
45 +### 2.2 Message representation
46 +
47 +Messages are **OpenAI chat-completions dicts** used as the internal lingua franca — even for Anthropic. The `ContextEngine` contract states returned lists must be "a valid OpenAI-format message sequence" (`agent/context_engine.py:177`). On top of the wire format, Hermes stamps bookkeeping sidecars onto stored messages:
48 +
49 +- `api_content` — the *exact bytes* sent to the provider when they differ from the clean stored content (memory prefetch and plugin context are injected into the API copy only). Replayed on later turns so the provider prompt-cache prefix stays **byte-stable** (`conversation_loop.py:1840–1897`).
50 +- `display_kind` / `display_metadata` — presentation-only timeline metadata (e.g. `auto_continue`, `async_delegation_complete`).
51 +- `reasoning`, `_row_id`, `_thinking_prefill`, `_length_continuation_*` — trajectory/DB bookkeeping.
52 +
53 +Every outgoing copy is built by `_clone_message_for_send` (structural clone, not `.copy()`) and every sidecar is popped before dispatch (`conversation_loop.py:1830–1919`). Provider adapters (`agent/anthropic_adapter.py`, `bedrock_adapter.py`, `vertex_adapter.py`, `gemini_native_adapter.py`, `codex_responses_adapter.py`) translate to native APIs.
54 +
55 +### 2.3 Tool call parsing and hygiene
56 +
57 +Tool calls arrive in OpenAI `tool_calls` shape (`tc.function.name`, `tc.function.arguments` JSON string). Before execution, Hermes runs an extraordinary amount of defensive hygiene:
58 +
59 +- `AIAgent._sanitize_tool_call_arguments` with an identity-keyed validation cursor so already-validated history isn't re-parsed each iteration (`conversation_loop.py:1762–1785`).
60 +- `repair_message_sequence_with_cursor` (`agent/agent_runtime_helpers.py`) fixes role-alternation violations (`tool → user`, `user → user` tails) that make providers return empty content.
61 +- `_uniquify_tool_call_ids`, `_deduplicate_tool_calls`, `_cap_delegate_task_calls` (`run_agent.py:4686–4746`); invalid tool names get a structured error result (`_invalid_tool_name_error_content`, `conversation_loop.py:1015`) instead of a crash.
62 +- Malformed JSON arguments produce a synthetic error tool-result via `_parse_tool_arguments` (`agent/tool_executor.py:141`) so the model can self-correct.
63 +
64 +### 2.4 Tool execution
65 +
66 +`agent/tool_executor.py` (2,429 lines) provides two paths, both appending `role: "tool"` result messages in original call order:
67 +
68 +- `execute_tool_calls_concurrent` (`tool_executor.py:758`) — ThreadPoolExecutor fan-out with a **start-order gate** (results stay ordered, execution overlaps), a `batch_abandoned` event so deadline/interrupt releases parked workers, and `_ConcurrentToolAuthorizationGate` (`tool_executor.py:391`) which serializes *human approval prompts* inside a concurrent batch and excludes human wait time from timeouts.
69 +- `execute_tool_calls_sequential` (`tool_executor.py:1603`) — fallback path.
70 +- A middleware pipeline (`_run_agent_tool_execution_middleware`, `tool_executor.py:482`) wraps dispatch: checkpointing, guardrails (`agent/tool_guardrails.py`), plugin pre/post hooks, approval gates, and the display/activity feed. A notable comment: the `tool_search` deferred-tool bridge is unwrapped *before* hooks so "hooks must observe the real tool name" (`tool_executor.py:~840`).
71 +- After each tool result, the session DB is incrementally flushed (`_flush_session_db_after_tool_progress`) for crash resilience.
72 +
73 +Tool output is bounded by a 3-layer persistence budget (`tools/budget_config.py`): per-result threshold (default 100K chars), per-turn aggregate (200K chars), and a preview size (1,500 chars) — oversized results are spilled to disk and replaced with a preview + path, with `read_file` pinned to `inf` to prevent persist→read→persist loops.
74 +
75 +### 2.5 Dispatch and the tool registry
76 +
77 +`tools/registry.py::ToolRegistry` — `ToolEntry` records `name, toolset, schema, handler, check_fn, emoji, max_result_size` (`registry.py:201`). Discovery is **AST-based**: `discover_builtin_tools` parses tool modules for `registry.register(` calls without importing them, with an on-disk discovery cache (`registry.py:108–187`). `check_fn` results are cached with scope control (`check_fn_cache_scope`) so availability probes (binaries present, API keys set) don't rerun per call. `dispatch()` normalizes handler results and bounds error text (`_bound_error_text`). `toolsets.py::TOOLSETS` groups tools into named, composable sets; the session's granted toolsets gate what the model sees.
78 +
79 +### 2.6 Failure handling and retry
80 +
81 +This is Hermes' most mature subsystem. `agent/error_classifier.py::classify_api_error` maps any provider exception to a `ClassifiedError` carrying a `FailoverReason` enum (~22 values: `auth`, `auth_permanent`, `billing`, `rate_limit`, `upstream_rate_limit`, `overloaded`, `server_error`, `timeout`, `ssl_cert_verification`, `context_overflow`, `payload_too_large`, `image_too_large`, `model_not_found`, `content_policy_blocked`, `format_error`, `thinking_signature`, `long_context_tier`, …) plus explicit recovery hints: `retryable`, `should_compress`, `should_rotate_credential`, `should_fallback` (`error_classifier.py:24–98`). The loop consumes the hints instead of re-classifying.
82 +
83 +The loop body then contains dozens of named recovery sections (grep `# ──` in `conversation_loop.py`): content-policy refusal, thinking-budget exhaustion, image-rejection recovery, Bedrock streaming failure, invalid encrypted reasoning replay, llama.cpp grammar-parse recovery, auth-failure provider failover, partial stream recovery, post-tool-call empty-response nudge, thinking-only prefill continuation, empty-response retry, dropped-tool-call recovery (providers returning `finish_reason="tool_calls"` with an empty array), length continuations with fragment joining (`_join_truncated_parts`), and fallback-provider chains with credential pools (`agent/credential_pool.py`, `_recover_with_credential_pool`).
84 +
85 +**Verdict:** the *classification* design (typed reason + recovery hints, consumed by the loop) is excellent. The *placement* — thousands of lines of recovery inline in one loop — is the anti-pattern.
86 +
87 +### 2.7 Cancellation, steering, redirecting
88 +
89 +Three distinct verbs on `AIAgent` (`run_agent.py`):
90 +
91 +- `interrupt(message, hard_cancel=False)` (`run_agent.py:3091`) — sets `_interrupt_requested`, aborts in-flight sockets (`_abort_request_openai_client` / `_abort_request_anthropic_client` force-close TCP sockets), checked at loop top and in tool pre-flight; cancelled tools get synthetic `[Tool execution cancelled …]` results with proper `tool_call_id`s so history stays valid (`tool_executor.py:776–806`). `hard_interrupt` escalates.
92 +- `steer(text)` (`run_agent.py:3292`) — queues mid-turn user guidance. Drained at two seams: pre-API-call (appended to the *last tool message* via `format_steer_marker`, since injecting a user message would break role alternation — `conversation_loop.py:1705–1754`) and post-tool-batch (`_apply_pending_steer_to_tool_results`). If no tool message exists yet, it stays pending.
93 +- `redirect(text)` (`run_agent.py:3328`) — rewrites the active turn's objective (`_apply_active_turn_redirect`).
94 +
95 +This is a first-class design for "type while the agent works" and directly matches KHAELOR's queued-steering requirement.
96 +
97 +### 2.8 Task completion
98 +
99 +There is no explicit "completion tool". A turn ends when the model returns a response without tool calls — but Hermes gates that with **verification-on-stop**: `agent/verification_stop.py::build_verify_on_stop_nudge` checks whether code files changed this turn lack fresh passing verification evidence, and if so injects a synthetic user message: *"[System: You edited code in this turn, but the workspace does not have fresh passing verification evidence yet … Run the relevant verification command now …]"* — with detected verify commands, or `hermes verify --json` (a detect→build→test→boot→readiness pipeline in `agent/verify/{recipes,runner,environment}.py`), capped at `max_attempts=2`, and documentation-only changes filtered out (`_filter_verifiable_paths`). The withheld candidate answer is preserved (`_pending_verification_response`) so budget exhaustion returns it rather than losing it (`turn_finalizer.py:70–140`). Every exit path records a `_turn_exit_reason` diagnostic string. `finalize_turn` returns the turn result dict and fires the context engine's `on_turn_complete` observation hook.
100 +
101 +This is the closest existing implementation of KHAELOR's `CompletionEvidence` idea, and it works by *nudging the model with evidence*, not by trusting the model's confidence.
102 +
103 +---
104 +
105 +## 3. Context Management
106 +
107 +### 3.1 System prompt — three cache tiers
108 +
109 +`agent/system_prompt.py::build_system_prompt_parts` (line 152) assembles the system prompt as three ordered tiers, explicitly designed around cache stability:
110 +
111 +- **stable** — cross-session-stable prefix: `SOUL.md` identity (or `DEFAULT_AGENT_IDENTITY`), task-completion/no-fabrication guidance, parallel-tool-call guidance, per-tool behavioral guidance blocks (only injected when the tool is loaded), tool-use enforcement (with model-family-specific guidance blocks for Gemini/GPT/Grok), environment hints, coding operating brief.
112 +- **context** — workspace snapshot, context files (project instructions), caller-supplied system message.
113 +- **volatile** — skills index, memory snapshot, user profile, external memory provider block, timestamp.
114 +
115 +The docstring is explicit: *"Hermes never re-renders parts of this string mid-session — that's the only way to keep upstream prompt caches warm across turns."* The result is cached on `agent._cached_system_prompt` for the agent's lifetime.
116 +
117 +### 3.2 Prompt caching
118 +
119 +`agent/prompt_caching.py` builds a `PromptCachePlan` (`build_prompt_cache_plan`, `apply_anthropic_cache_control`): cache markers on the system tiers plus markers at "completed transaction endpoints" in the conversation, with helpers to strip markers for providers that reject them. Combined with the `api_content` byte-replay sidecar (§2.2), byte-stability of the prefix is treated as a hard invariant across the whole codebase.
120 +
121 +### 3.3 Pluggable ContextEngine
122 +
123 +`agent/context_engine.py::ContextEngine` (ABC, 489 lines) is one of Hermes' cleanest designs. Engines are selected by `context.engine` in config; the default is the built-in compressor; third parties plug in via `plugins/context_engine/<name>/`. The interface separates concerns precisely:
124 +
125 +- `update_from_response(usage)` — token accounting from real API usage.
126 +- `should_compress()` / `should_compress_info()` (returns a human-readable block reason) / `should_compress_preflight()`.
127 +- `compress(messages, focus_topic, force, memory_context)` — the compaction verb.
128 +- `select_context(request_messages, …)` — the *selection* verb: per-request context replacement (retrieval, topic routing), explicitly documented as orthogonal to compression ("context is too long → make it shorter" vs "this turn belongs to a different context → use that one instead"), request-only (never persisted).
129 +- `on_turn_complete(messages, usage)` — post-turn observation/ingestion.
130 +- `prune_tool_results_only()` — cheap deterministic prune, no LLM call.
131 +- `get_tool_schemas()` / `handle_tool_call()` — engines may expose their own tools to the model.
132 +- Lifecycle: `on_session_start/end/reset`, `update_model` (per-model threshold overrides).
133 +
134 +### 3.4 The default compressor
135 +
136 +`agent/context_compressor.py::ContextCompressor` (line 1577) documents its algorithm in its docstring:
137 +
138 +1. Prune old tool results (cheap, no LLM).
139 +2. Protect head messages (system prompt + first `protect_first_n=3` non-system messages).
140 +3. Protect tail by token budget (most recent ~20K tokens, `protect_last_n=6`).
141 +4. Summarize the middle with a structured LLM prompt on an **auxiliary model** (`agent/auxiliary_client.py`), chunked when needed.
142 +5. On later compactions, iteratively update the previous summary.
143 +
144 +Trigger: `threshold_percent` default 0.75 of the model's context window, with per-model overrides (`resolve_model_threshold`). Around this core sits a huge amount of operational hardening: micro-compaction (rolling summary cursors), anti-thrash guards (`_ineffective_compression_count`, recovery deadlines), summary-failure cooldowns, a cross-process compression lock with lease refresh (`CompressionCommitFence`, `_CompressionLockLeaseRefresher`, `agent/conversation_compression.py:445/1508`), a bounded executor with admission control (`_try_admit_compression_job`), telemetry per attempt (regions, aux tokens, durations, commit status), guarantees the compressed list still contains a real user turn (`_ensure_compressed_has_user_turn`), skill-aware pruning (old `skill_view` results demoted to `[SKILL_PRUNED: … reload with skill_view(name='X')]` markers), and image shrinking on 413s (`try_shrink_image_parts_in_messages`). Per-turn compression attempts are capped (`max_compression_attempts`, default 3), shared across the preflight gate, overflow retries, and post-tool compaction.
145 +
146 +### 3.5 Memory injection into the prompt
147 +
148 +Two mechanisms, both cache-conscious:
149 +
150 +- Built-in memory (`MEMORY.md`/`USER.md`) is injected as a **frozen snapshot** into the volatile system-prompt tier at session start; mid-session writes hit disk but never mutate the live prompt (`tools/memory_tool.py::format_for_system_prompt`, `system_prompt.py:523–540`).
151 +- External provider recall is per-turn: `MemoryManager.prefetch_all(query)` (skipped for trivial prompts via `TRIVIAL_PROMPT_RE`), wrapped in a `<memory-context>` fence with a "[System note: … NOT new user input …]" marker, and appended only to the **API copy** of the user message via the `api_content` sidecar — never the stored transcript (`agent/turn_context.py:1261`, `compose_user_api_content`). Provider text is redacted and hard-capped at 6,000 chars (`context_engine.py::sanitize_memory_context`).
152 +
153 +---
154 +
155 +## 4. Memory
156 +
157 +### 4.1 Built-in store: two Markdown files
158 +
159 +`tools/memory_tool.py::MemoryStore` — `$HERMES_HOME/memories/MEMORY.md` (agent notes) and `USER.md` (user profile). Entries are plain text joined by `ENTRY_DELIMITER = "\n§\n"`. Budgets are character-based: defaults 2,200 chars for memory, 1,375 for user profile (config-overridable). Durability is taken seriously: file locks (fcntl/msvcrt), atomic writes, read-verification before write (an unreadable-but-existing file aborts the write instead of wiping it), and external-drift detection with `.bak.<ts>` snapshots (`_detect_external_drift`).
160 +
161 +The model writes via a single `memory` tool (`MEMORY_SCHEMA`, `memory_tool.py:1161`): `action ∈ {add, replace, remove}`, `target ∈ {memory, user}`, and atomic `operations[]` batches validated against the *final* budget. Edits match by short unique substring (`old_text`), not IDs. Writes pass an approval gate and threat-pattern scan (`_scan_memory_content` → `tools/threat_patterns.py`).
162 +
163 +### 4.2 Automatic memory: the background review
164 +
165 +The real "curator of memory" is `agent/background_review.py`. After a turn, `turn_finalizer.py:757` may spawn a **forked `AIAgent` on a daemon thread** (max 16 iterations, persistence disabled, thread-scoped tool whitelist limited to memory/skill tools) that replays the conversation and asks itself "should any skill/memory be saved or updated?" (`_MEMORY_REVIEW_PROMPT`, `_SKILL_REVIEW_PROMPT`, `_COMBINED_REVIEW_PROMPT`). By default it runs on the parent's model, reusing the parent's cached system prompt so the transcript replay is warm cache reads; when routed to a cheaper aux model it replays a compact digest (tail 24 messages) instead, because a different model can't hit the cache anyway (`_resolve_review_runtime`). A new live turn cancels a still-running review to avoid doubled token accounting (`conversation_loop.py:1483–1506`). Additionally, a nudge fires every `memory.nudge_interval` turns (default 10, `turn_context.py:684`).
166 +
167 +### 4.3 Provider abstraction
168 +
169 +`agent/memory_provider.py::MemoryProvider` (ABC) with hooks `initialize`, `get_tool_schemas`, `system_prompt_block`, `prefetch`, `sync_turn`, `on_turn_start`, `on_session_end`, `on_session_switch`, `on_pre_compress`, `on_delegation`, `on_memory_write`, `backup_paths`. `agent/memory_manager.py::MemoryManager` enforces exactly **one** external provider, rejects tools shadowing core names, runs prefetch on a watchdog thread (8s timeout), and drains syncs on a serialized single-worker executor at shutdown. Providers ship in `plugins/memory/`: `honcho` (hosted, OAuth, LLM "dialectic" recall), `hindsight` (local daemon + embeddings), `mem0`, `supermemory`, `holographic` (local SQLite with FTS5/BM25 + Jaccard + HRR-vector blended scoring and trust weighting — `plugins/memory/holographic/store.py`), and more. The built-in file store is *not* a provider; it lives directly on `agent._memory_store`.
170 +
171 +### 4.4 Session vs long-term
172 +
173 +Long-term = MEMORY.md/USER.md snapshot + external provider. Session-scoped = the SQLite transcript, searched on demand via the `session_search` tool (`tools/session_search_tool.py`) over an FTS5 index (`messages_fts_cjk`, `hermes_state.py:1906`) with discovery/scroll/browse modes and no LLM calls. The memory tool schema explicitly routes "task progress, completed-work logs" to `session_search` rather than memory. Subagents get `skip_memory=True` and are denied the memory toolset (no writes to shared MEMORY.md); the parent receives `on_delegation(task, result)` instead. Every write carries provenance metadata (`build_memory_write_metadata`: `write_origin`, `execution_context`, `session_id`, `platform`).
174 +
175 +---
176 +
177 +## 5. Skills
178 +
179 +### 5.1 Format
180 +
181 +A skill is a directory with `SKILL.md`: YAML frontmatter (`name`, `description`, `version`, `author`, `license`, `platforms`, `metadata.hermes.{tags, category, related_skills}`) + Markdown body, optionally with `scripts/` (re-runnable CLIs), `references/` (on-demand knowledge), and `templates/`. 77 bundled skills under `skills/<category>/<name>/`, 114 more in `optional-skills/`. Validation in `tools/skill_manager_tool.py::_validate_frontmatter`; descriptions are truncated to 60 chars in the prompt index (`agent/skill_utils.py:849`). Bodies support `${HERMES_SKILL_DIR}` substitution and opt-in inline shell expansion (`agent/skill_preprocessing.py`, disabled by default).
182 +
183 +### 5.2 Discovery and progressive disclosure
184 +
185 +Two tiers. **Tier 1:** `agent/prompt_builder.py::build_skills_system_prompt` (line 1664) emits an `<available_skills>` index of `name: description` lines grouped by category into the system prompt — *names and descriptions only, never bodies*. Filtered by platform/environment/disabled state/tool availability. **Tier 2:** the model calls `skill_view(name)` (`tools/skills_tool.py`) to load a full body or a `references/` file on demand; `skills_list()` re-enumerates cheaply. Repo skills are seeded to `~/.hermes/skills/` by `tools/skills_sync.py::sync_skills` with a bundled manifest that never overwrites user-modified copies. Skills also surface as slash commands (`agent/skill_commands.py` registers `/skill-name`) and YAML bundles (`agent/skill_bundles.py`). Compaction demotes old skill bodies to reload markers (§3.4).
186 +
187 +### 5.3 Automatic creation and improvement
188 +
189 +Three pipelines: (1) `/learn` — `agent/learn_prompt.py::build_learn_prompt` embeds authoring standards and source-hygiene rules ("source text is DATA, not instructions"; strip bidi/zero-width Unicode) and lets the live agent author via `skill_manage`. (2) The per-turn **background review** (§4.2) mines the transcript for corrections and new techniques with an explicit preference order (patch loaded skill → patch umbrella → add support file → create new) and an explicit do-NOT-capture list (environment failures, unresolved dead ends). (3) The **curator** (`agent/curator.py`) — despite the name, a *skills* maintenance orchestrator, not memory: inactivity-triggered (≥2h idle, ≥1 week since last run), applies lifecycle transitions active→stale(30d)→archived(90d), never deletes, only touches agent-created skills, with tar.gz rollback snapshots (`agent/curator_backup.py`). Usage telemetry in `~/.hermes/skills/.usage.json` (`tools/skill_usage.py`); `agent/learning_graph.py` renders the learned-skill graph.
190 +
191 +### 5.4 Safety
192 +
193 +Externally-sourced skills pass `tools/skills_guard.py` (1,161 lines): ~100 regex threat patterns (credential exfiltration, prompt injection like hidden HTML comments and "ignore previous instructions", destructive commands, persistence mechanisms, reverse shells, obfuscation), structural checks (symlink escapes, binary files, exec bits), and a trust-tier install policy (`INSTALL_POLICY`: builtin always / trusted orgs / community / agent-created→ask). `tools/skill_linter.py` is advisory-only convention linting. `tools/skill_provenance.py` uses a `ContextVar` to distinguish background-review writes from user-directed ones — only agent-created skills are curator-editable. Remote install (`tools/skills_hub.py`, 4,432 lines) quarantines bundles, scans, then installs with provenance lockfiles and audit logs; sync across devices (`tools/skills_sync_client.py`) is a content-addressed blob/tree/commit scheme.
194 +
195 +---
196 +
197 +## 6. Terminal Execution and Processes
198 +
199 +### 6.1 Two tools: `terminal` and `process`
200 +
201 +The `terminal` toolset contains exactly two model tools (`tools/terminal_tool.py:3610`, `tools/process_registry.py:2947`):
202 +
203 +- **`terminal`** — params: `command`, `background`, `timeout`, `workdir`, `pty`, `notify_on_complete`, `watch_patterns[]`. Foreground default timeout 180s, hard cap 600s (`FOREGROUND_MAX_TIMEOUT`) — beyond that the call is *rejected with a nudge to use background*. `_foreground_background_guidance` refuses obvious server commands in foreground. Timeout → exit code 124; interrupt → 130.
204 +- **`process`** — `action ∈ {list, poll, log, wait, kill, write, submit, close}` + `session_id`, `data`, `timeout`, `offset`, `limit`. `poll` returns status + last-1,000-char preview; `log` paginates; `wait` blocks with interrupt support; `kill` handles PTY/process-tree/in-sandbox PIDs.
205 +
206 +There is **no persistent shell session and no named terminals**: `tools/environments/local.py::LocalEnvironment` (line 1414) is explicitly "spawn-per-call" — each `execute()` spawns fresh `bash -c`, with env-var snapshots sourced per call and cwd tracked out-of-band (`record_session_cwd`/`get_session_cwd`). Statefulness lives in background *process sessions* (`proc_<hex12>` IDs) instead.
207 +
208 +### 6.2 Process registry
209 +
210 +`tools/process_registry.py::ProcessRegistry` (singleton): local spawns via `Popen([shell, "-lic", "set +m; " + cmd], start_new_session=True)` + daemon reader threads; optional PTY via `ptyprocess`/`winpty`; optional systemd scope wrapping for cgroup/OOM isolation under supervised gateways. Limits: 200K-char rolling buffer per process, 64 processes max (LRU-pruned), finished-process TTL 30 min. Crash recovery: checkpoints to `~/.hermes/processes.json` with PID-reuse guards (`_host_pid_is_ours` checks `/proc/<pid>` start ticks). `notify_on_complete` and `watch_patterns` push events into a `completion_queue` that re-enters the conversation — with rate limiting (1 per 15s), a 3-strike auto-disable, and a global circuit breaker. Sandbox backends without live pipes are emulated with `nohup … > log` plus `.pid`/`.exit` files and a poller loop (`spawn_via_env`).
211 +
212 +### 6.3 Output handling
213 +
214 +Foreground output is bounded *while streaming* by `_BoundedOutputCollector` (`tools/environments/base.py:81`): a 40% head / 60% tail window with a full-fidelity spill file (cap 5M chars). Model-facing cap defaults to 50,000 chars (`tools/tool_output_limits.py`), head/tail split with an explicit `[OUTPUT TRUNCATED - N chars omitted out of M total]` marker; then full ECMA-48 ANSI stripping (`tools/ansi_strip.py`) and secret redaction. The result includes `output_total_chars`, `full_output_path`, and a `truncation_note` so the model can read the spill file instead of re-running the command. `tools/terminal_hints.py::annotate_failure` adds one recovery hint on non-zero exits.
215 +
216 +### 6.4 Environments (Docker/SSH/remote)
217 +
218 +Backend selected by `TERMINAL_ENV`: `local`, `docker`, `singularity`, `modal`, `daytona`, `vercel_sandbox`, `ssh` (`_get_env_config`, environments cached per `task_id`, idle-reaped after 300s). Docker (`tools/environments/docker.py`) starts one long-lived container per task (`docker run -d --init … sleep infinity`) and `docker exec`s each command; containers are reused and orphans reaped. SSH (`tools/environments/ssh.py`) is spawn-per-call over ControlMaster-multiplexed connections with file sync helpers. Isolated container backends **skip the approval gate entirely** unless host paths are bind-mounted (`_should_skip_container_guards`).
219 +
220 +### 6.5 Command safety — the layered gate
221 +
222 +`tools/approval.py::check_all_command_guards` (line 3734) runs, in order:
223 +
224 +1. Container fast-path (isolated → skip).
225 +2. **Hardline floor** (`HARDLINE_PATTERNS`, :434) — unbypassable even in yolo mode: `rm -rf /`, `mkfs`, `dd of=/dev/sd*`, fork bombs, shutdown/reboot. Matched against *de-obfuscated variants* of the command (home-prefix folding, command-substitution resolution — `_command_detection_variants`).
226 +3. Sudo-stdin guard; 4. user deny globs (pre-yolo); 5. yolo/allowlist bypasses (the permanent allowlist refuses commands containing shell operators).
227 +6. **Tirith** (`tools/tirith_security.py`) — an external security binary (`tirith check --json`) whose exit code is the verdict (0 allow / 1 block / 2 warn), auto-installed with SHA-256 verification, 5s timeout, fail-open by default, circuit breaker after 3 crashes.
228 +7. ~47 regex `DANGEROUS_PATTERNS` (recursive delete, `curl | sh`, SQL DROP, encoded-command execution…).
229 +8. **Smart approval** (`_smart_approve`, :3054) — an auxiliary-LLM guardian call (temperature 0, 16 max tokens) returning APPROVE/DENY/ESCALATE, with prompt-injection defenses (command delimited, operator policy in the system prompt only).
230 +9. Human gate (`_run_approval_gate`, :3147) — modes `manual|smart|off`, 300s timeout, choices `deny|session|always` persisted; gateway surfaces render approval buttons; timeouts return "Silence is not consent. Do NOT retry."
231 +
232 +---
233 +
234 +## 7. Subagents
235 +
236 +### 7.1 One tool, in-process threads
237 +
238 +The model sees a single `delegate_task` tool (`tools/delegate_tool.py:4330`; schema `DELEGATE_TASK_SCHEMA` at :4186): `goal`, `context`, `tasks[]` (batch of `{goal, context, role, output_schema}`), `role ∈ {leaf, orchestrator}`, `output_schema`. Crucially, **the model cannot choose the child's model or toolset** — children always inherit the parent's toolsets and resolved credentials (`_build_child_preserving_parent_tools`), and a model-supplied `max_iterations` is ignored in favor of config. Schema descriptions are rebuilt per `get_definitions()` so the model sees the user's real limits.
239 +
240 +Children are **in-process**: `_build_child_agent` (:1305) constructs a full `AIAgent` (`quiet_mode=True, platform="subagent", skip_context_files=True, skip_memory=True`) run on a `DaemonThreadPoolExecutor` via `child.run_conversation(...)`. No subprocess isolation.
241 +
242 +### 7.2 Context, results, limits
243 +
244 +- **Context inheritance: none.** The child gets a constructed system prompt (`_build_child_system_prompt`, :900): "You are a focused subagent…", the goal, optional context string, a workspace path hint — no parent transcript, no summary, no memory. Blocked child tools: `{delegate_task, clarify, memory, send_message, cronjob}` + kanban.
245 +- **Results:** top-level delegations are always **async/background** (`run_agent.py:7769` forces it); all children are joined and ONE consolidated completion event is pushed through `process_registry.completion_queue`, persisted with a delivery ledger, and re-enters the conversation as a new message. There is no model-facing polling tool — push, not poll. Orchestrator children (depth > 0) delegate synchronously. Child summaries are budget-capped against parent headroom with disk spill (`_apply_summary_budget`, `_spill_summary_to_file`).
246 +- **Live observability:** `tools/delegation_live_log.py` tees each child's tool calls/results/thinking into redacted, truncated, tail-able log files under `cache/delegation/live/`, with paths returned in the result.
247 +- **Concurrency/limits:** default 3 concurrent children (rejects at capacity rather than queueing), depth `MAX_DEPTH = 1` by default (recursion requires `role="orchestrator"` + config ≥ 2 + a kill switch), per-child fresh `IterationBudget` (50), heartbeat staleness monitors, and a global spawn-pause switch.
248 +- **Not delegation:** `agent/moa_loop.py` (mixture-of-agents) runs N parallel *stateless advisor LLM calls* per iteration and injects their labeled outputs as guidance into the aggregator's prompt — no tools, no subagents. `hermes_cli/kanban_swarm.py` writes a task graph (planner → parallel workers → verifier → synthesizer) into a Kanban DB executed by a separate dispatcher as independent OS processes with a JSON "blackboard".
249 +
250 +---
251 +
252 +## 8. TUI
253 +
254 +### 8.1 Two UIs, one gateway protocol
255 +
256 +- **Legacy CLI** (`cli.py`, 18,700 lines): a **prompt_toolkit** `Application` — fixed input area, transcript printed to scrollback via `print_formatted_text`; `rich` only for banners/tables (lazily imported to save ~50ms); **curses** only for selection widgets (`hermes_cli/curses_ui.py`: fuzzy-filtered checklists/radiolists with non-TTY numbered fallbacks). Streaming responses render inside a `╭─ ⚕ Hermes ─…─╮` box; tool calls drive a spinner + elapsed timer via callbacks (`_on_tool_gen_start/_on_tool_progress/_on_tool_start/_on_tool_complete`, `cli.py:12156–12360`); file edits render inline diffs (`render_edit_diff_with_delta`). `hermes_cli/pt_input_extras.py` patches prompt_toolkit key tables so Kitty CSI-u / xterm modifyOtherKeys Shift+Enter and Ctrl+Enter work.
257 +- **New TUI** (`ui-tui/`, TypeScript): **React 19 + a vendored fork of Ink** (`packages/hermes-ink`, ~100 files) extending stock Ink with `ScrollBox`, alternate-screen, mouse/wheel handling, text selection, hyperlinks, and OSC background-color queries. State in **nanostores** (not React state): `turnStore`, `uiStore`, `overlayStore`, `delegationStore`. `AGENTS.md:469`: "The TUI is a full replacement for the classic (prompt_toolkit) CLI" — though the shipped default interface is still `cli`.
258 +- **Bridge:** `tui_gateway/` — Node spawns `python -m tui_gateway.entry`; newline-delimited JSON-RPC over stdin/stdout; ~40 typed event kinds (`message.start/delta/complete`, `thinking.delta`, `tool.start/generating/progress/complete`, `subagent.*`, `approval/clarify/sudo/secret.request`, …) mapped by `src/app/createGatewayEventHandler.ts`. The same dispatch is reused verbatim over WebSocket for iOS/web (`tui_gateway/ws.py`), with streaming delta events coalesced on a 33ms timer.
259 +
260 +### 8.2 Rendering discipline (the part worth studying closely)
261 +
262 +- **Incremental streaming markdown:** `src/components/streamingMarkdown.tsx` keeps a `StreamScanState`; `advanceScan()` walks only newline-terminated input, freezes settled top-level blocks (at `\n\n` outside code fences) into memoized `<Md>` children, and re-parses only the live tail — explicitly avoiding O(blocks²) re-tokenization.
263 +- **Bounded live region:** `src/config/limits.ts` — `LIVE_RENDER_MAX_CHARS = 16_000`, `LIVE_RENDER_MAX_LINES = 240`; persisted tool trails capped at 800 chars / 12 lines (a comment cites issue #34095: unbounded trails OOM-killed Node); history capped at 800 entries.
264 +- **Virtualized scrollback:** `src/hooks/useVirtualHistory.ts` — overscan 20, max 120 mounted rows, height caching — inside the fork's `ScrollBox`.
265 +- **Tool rendering:** a live "activity lane" (`components/thinking.tsx::ToolTrail`) separate from the transcript, with per-section three-state visibility `DetailsMode = hidden | collapsed | expanded` (`domain/details.ts`), toggled by `/details <section> <mode>`.
266 +- **Status bar:** `components/appChrome.tsx::statusBarSegments` — responsive progressive disclosure keyed on terminal width (context bar ≥72 cols, duration ≥76, compressions ≥80, …), spinner width pre-reserved so the model name never jitters. `Usage` carries real `cost_usd`, `context_percent`, `compressions`, `active_subagents`.
267 +- **Composer:** a hand-written line editor (`components/textInput.tsx`, 47KB — `ink-text-input` is used only for masked/free-text prompts). Emacs-style bindings, `$EDITOR` escape hatch, wheel-scroll with acceleration, a pager overlay (`j/k/space/q`). Slash registry client-side with fall-through to Python (`slash.exec` → `command.dispatch`) so plugins/skills own unknown commands; completion debounced 60ms; an inline `INLINE_SLASH_RE` lets the user mention `/skill-name` mid-prose.
268 +- **Markdown/syntax:** hand-rolled renderer (36KB) with a 512-entry LRU; hand-rolled regex highlighter (`lib/syntax.ts`) — no Shiki/Prism dependency.
269 +
270 +Hermes shipped the Python REPL first and is now paying for a full parallel TypeScript rewrite plus a JSON-RPC bridge process. KHAELOR starting TypeScript-native skips that entire tax.
271 +
272 +---
273 +
274 +## 9. Sessions and Persistence
275 +
276 +`hermes_state.py` (10,888 lines): a SQLite session DB at `~/.hermes/` with hard-won operational armor — WAL mode with detection of broken SQLite builds and DELETE-mode fallback (`apply_wal_with_fallback`, `is_sqlite_wal_reset_vulnerable`), a macOS fsync checkpoint barrier (`_apply_macos_checkpoint_barrier`), schema self-repair with backups (`repair_state_db_schema`), disk-full/lock classification (`classify_persistence_error` — surfaced to the user as a cause, reset per turn), test-isolation guards refusing to touch production DBs under pytest, and an FTS5 index (with a CJK tokenizer shared object) powering session search. Messages are flushed incrementally during the turn (`_flush_messages_to_session_db`, cursor `_last_flushed_db_idx` recomputed when repairs compact the list) so a crash mid-turn loses almost nothing. Sessions can be resumed, exported (md/html), recovered, and are workspace-keyed. Trajectories are additionally saved in a training-friendly format (`_save_trajectory`, `trajectory_compressor.py`).
277 +
278 +---
279 +
280 +## 10. Cross-Cutting Observations
281 +
282 +1. **Byte-stability as a religion.** The `api_content` sidecar, the frozen memory snapshot, the never-re-rendered system prompt, `select_context()`'s documented cache contract — every subsystem is designed backwards from "the prompt prefix must not change." This is the correct economics for long agent sessions and KHAELOR must internalize it from day one.
283 +2. **The auxiliary-model pattern.** Compression summaries, smart command approval, background review, curator, MoA advisors, title generation — Hermes routes cheap/secondary cognition to a configurable aux model (`agent/auxiliary_client.py`) rather than burning main-model context.
284 +3. **Everything is recoverable, nothing is atomic by accident.** Alternation repair, tool-call sanitization, ghost-row dropping, checkpoint/undo (`_checkpoint_mgr`), process-registry crash checkpoints, compression commit fences. The cost: the repair code is interleaved with the happy path everywhere.
285 +4. **Provider sprawl is the single largest complexity driver.** Credential pools, failover chains, per-provider quirk handling (Moonshot `reasoning_content`, Mistral strict fields, llama.cpp grammar bugs, Copilot header dances, Codex app-server bypass at `conversation_loop.py:1625`) account for a huge fraction of `run_agent.py` and the loop. KHAELOR's Anthropic-only V1 amputates this entire axis.
286 +5. **Python + threads everywhere.** Daemon threads, locks, `contextvars`, thread-scoped output silencing, watchdogs. An async TypeScript runtime with a typed event bus expresses the same concurrency far more cleanly.
287 +
288 +---
289 +
290 +## WHAT HERMES DOES VERY WELL
291 +
292 +1. **Prompt-cache discipline as an architectural invariant.** Three-tier system prompt built once per session (`agent/system_prompt.py::build_system_prompt_parts`); byte-exact replay of historical messages via the `api_content` sidecar; ephemeral per-turn injections confined to the API copy of the current user message; cache markers planned deliberately (`agent/prompt_caching.py`). This directly multiplies into cost and latency wins.
293 +2. **The `ContextEngine` interface.** Clean ABC separating *selection* (`select_context`) from *compression* (`compress`) from *observation* (`on_turn_complete`) from *cheap pruning* (`prune_tool_results_only`), with real token accounting from API usage. The best-factored component in the codebase.
294 +3. **Verification-on-stop.** `agent/verification_stop.py` + `agent/verify/` refuse to let the agent claim completion on edited code without fresh verification evidence — implemented as an evidence-bearing synthetic nudge with detected verify commands, attempt caps, and preservation of the withheld answer.
295 +4. **Steer/redirect/interrupt as three distinct verbs** (`run_agent.py:3091/3292/3328`), with steering injected at safe role-alternation seams (into tool results) and interruption that produces *valid* history (synthetic cancelled tool results with correct IDs).
296 +5. **Structured error classification driving recovery.** `FailoverReason` + `ClassifiedError{retryable, should_compress, should_rotate_credential, should_fallback}` (`agent/error_classifier.py`) — the loop consumes typed hints instead of string-matching exceptions at each site.
297 +6. **Tool-output economics.** Bounded-while-streaming capture with head/tail windows, disk spill with the path returned to the model, per-result + per-turn char budgets (`tools/budget_config.py`), ANSI stripping, redaction, and one actionable failure hint. Nothing dumps 200K chars into context.
298 +7. **Progressive disclosure for skills.** Names+60-char descriptions in the prompt; bodies on demand via `skill_view`; compaction demotes stale bodies to reload markers. Context-cheap and self-consistent.
299 +8. **The layered command gate** (`tools/approval.py::check_all_command_guards`): unbypassable hardline floor matched against de-obfuscated command variants, then deny rules, then external analyzer, then regex patterns, then an LLM guardian, then the human — with "silence is not consent" timeout semantics.
300 +9. **Background self-improvement that respects the live turn.** The forked review agent reuses the warm prompt cache, is tool-whitelisted, cannot persist, and is cancelled the instant a new live turn starts.
301 +10. **TUI rendering discipline** (in the new `ui-tui/`): incremental streaming-markdown scanner with settled-block freezing, hard live-render caps, virtualized scrollback, width-responsive status segments with pre-reserved spinner width, and a typed ~40-event gateway protocol with 33ms delta coalescing.
302 +11. **Persistence paranoia that pays off.** Incremental mid-turn DB flushes, WAL fallbacks, schema self-repair, drift-detecting memory writes, process-registry crash checkpoints with PID-reuse guards.
303 +
304 +## WHAT HERMES DOES POORLY
305 +
306 +1. **God-files.** `cli.py` 18.7K lines; `run_agent.py` 8.3K (an `AIAgent` with ~400 methods spanning HTTP client lifecycle, credential refresh for a dozen providers, stream diagnostics, TTS, billing); `conversation_loop.py` a ~6,000-line single loop body; `hermes_state.py` 10.9K. The project's own AGENTS.md solicits extraction PRs. Comprehension, testing, and change safety all suffer.
307 +2. **Recovery logic interleaved with the happy path.** Dozens of `# ──`-labeled inline recovery regions inside one `while` loop (empty-response retries, dropped-tool-call recovery, thinking-prefill continuations, provider-specific stream stalls). The classification is typed; the *handling* is spaghetti.
308 +3. **Provider abstraction leaks everywhere.** OpenAI dict format as internal lingua franca plus per-provider sanitizers (`_should_sanitize_tool_calls`, `_sanitize_tool_calls_for_strict_api`, Moonshot/Mistral/Gemini special cases) scattered through the loop rather than confined to adapters. Even an Anthropic-only system should learn from this: keep provider translation at one boundary.
309 +4. **Tool surface bloat.** ~93 registered tools; the shared core toolset includes browser automation, video generation, and TTS — every schema shipped on every API call unless toolset-gated. Hermes needed `tool_search` (a deferred-tool bridge) to mitigate its own tool count.
310 +5. **Two parallel UIs plus a bridge process.** A 18.7K-line prompt_toolkit REPL, a full React/Ink TUI, and a Python↔Node JSON-RPC gateway — the cost of choosing Python first for a terminal product.
311 +6. **No true workspace abstraction for file tools.** Terminal *execution* has a clean `Environment` backend layer (`tools/environments/`), but file tools and much of the agent touch the local filesystem directly; "the world" is not one seam.
312 +7. **Subagents receive no parent context.** `delegate_task` children start from a bare goal+context string — no transcript summary, no relevant-file digest. Fine for independent research tasks; poor for "continue this refactor" delegation.
313 +8. **In-process threading for everything.** Daemon threads + locks + contextvars for subagents, reviews, compression leases, watchdogs. Workable, but a large share of the code exists to police thread lifetimes and cross-thread output.
314 +9. **Configuration/entropy sprawl.** Hundreds of config keys, env vars, per-model overrides, and legacy fallbacks (`hermes_cli/config_defaults.py`, `config_migrations.py`) — the price of never removing anything.
315 +10. **Character-based budgets where tokens are meant.** Memory limits, tool-output caps, and compression estimates largely operate in chars with rough token heuristics (`estimate_messages_tokens_rough`, `_estimate_msg_budget_tokens`) — pragmatic, but produces the anti-thrash machinery that real token accounting would partly avoid.
316 +
317 +## WHAT KHAELOR SHOULD ADOPT
318 +
319 +1. **Cache-tiered prompt assembly + byte-stable replay.** Build the system prompt once per session in stable/context/volatile tiers; never mutate past turns; confine per-turn ephemeral context to the current request; plan Anthropic `cache_control` breakpoints deliberately. This is KHAELOR's context-engine bedrock.
320 +2. **The `ContextEngine` verb separation** — `select_context` (per-request) vs `compress` (shrink) vs `on_turn_complete` (observe) vs `prune_tool_results_only` (cheap, deterministic, no LLM) — plus real usage-fed token accounting. Map directly onto KHAELOR's Context Engine and `/context` inspector.
321 +3. **Compression algorithm skeleton:** protect head, protect recent tail by token budget, prune tool results first, summarize the middle, iteratively update the summary — with anti-thrash guards and a per-turn attempt cap. Skip the distributed-lock machinery (KHAELOR is single-process V1).
322 +4. **Verification-on-stop as the completion gate.** Detect changed files per turn, detect the repo's verify commands, and nudge the model with evidence before accepting completion — this *is* KHAELOR's `CompletionEvidence`, proven in production. Include the "preserve the withheld answer on budget exhaustion" detail.
323 +5. **Steer at role-safe seams; cancel into valid history.** Queue user input during a turn; inject at the tool-result boundary; on interrupt, emit synthetic cancelled tool results with correct IDs so the session never corrupts. Matches KHAELOR's queued-steering requirement exactly.
324 +6. **Typed error classification with recovery hints** (`retryable / should_compress / should_fallback`), but handle recoveries in a small policy module *outside* the kernel loop — Hermes proves the taxonomy, KHAELOR must fix the placement.
325 +7. **Tool-output budgeting with disk spill.** Per-result and per-turn caps, head/tail truncation with explicit omission markers, full output persisted to a path the model can `read` — plus ANSI stripping and secret redaction at the tool boundary.
326 +8. **The two-tool terminal split** (`bash` + `process`) with background sessions, incremental `poll`/`log` reads, rolling buffers, crash checkpoints, and a hard foreground-timeout ceiling that *redirects* long commands to the process manager. Hermes validates KHAELOR's §10 design almost line for line.
327 +9. **Concurrent tool batches with ordered results and a serialized approval gate** (`_ConcurrentToolAuthorizationGate`), and system-prompt guidance telling the model to batch independent calls.
328 +10. **A hardline unbypassable deny floor beneath the permission system**, matched against de-obfuscated command variants, plus "silence is not consent" timeout semantics for approval prompts.
329 +11. **Progressive disclosure for any indexed corpus** (Hermes' skills pattern → KHAELOR's repository intelligence): tiny index in context, bodies on demand, compaction demotes to reload markers.
330 +12. **TUI mechanics from `ui-tui/`:** incremental settled-block markdown streaming, hard caps on the live render region, virtualized scrollback, width-responsive status segments with pre-reserved widths (no jitter), collapsed-by-default tool trails with per-section detail modes, and delta coalescing (~33ms) between engine and renderer.
331 +13. **Incremental mid-turn session persistence** (append/flush as tool results land) so a crash never loses a turn — KHAELOR's event-log-as-source-of-truth should flush with the same discipline.
332 +14. **The auxiliary-model seam.** Even Anthropic-only, KHAELOR should route summaries/compaction to a cheaper Anthropic model via config — one interface (`ModelClient`), two configured model IDs.
333 +
334 +## WHAT KHAELOR SHOULD NOT COPY
335 +
336 +1. **The god-file architecture.** No 8K-line agent class, no 6K-line loop body, no 18K-line CLI. KHAELOR's kernel stays small (Absolute Rule #3); every Hermes subsystem that lives *inside* `AIAgent`/`run_conversation` (credential refresh, stream diagnostics, billing capture, TTS, provider quirks) must be a service around the kernel or not exist.
337 +2. **Multi-provider machinery.** Credential pools, failover chains, per-provider sanitizers, OpenAI-dict lingua franca, adapter zoo. KHAELOR is Anthropic-native: internal message/event types modeled on Anthropic semantics, one `ModelClient`, no translation layers.
338 +3. **The everything-agent tool surface.** 93 tools, browser/video/TTS/kanban/cron in the core toolset, plus a `tool_search` bridge to cope with the count. KHAELOR ships 7 powerful primitives and holds the line.
339 +4. **Two UIs and a cross-language bridge.** No Python REPL + Node TUI + JSON-RPC gateway. One TypeScript process; the "gateway protocol" becomes KHAELOR's in-process typed event bus (the ~40-event vocabulary is still worth mining for event-type design).
340 +5. **Thread-based concurrency with lock/lease forests.** Compression commit fences, lock-holder liveness probes, thread-scoped stdout silencing, watchdog threads. KHAELOR uses async/await + AbortController semantics on a typed event bus.
341 +6. **In-process forked-agent background reviews and the skills/memory self-improvement complex** (background_review, curator, hub, sync, guard, linter, provenance — ~10K+ lines). Explicitly out of V1 scope; adopt only the *lesson* (aux-model, cache-warm, cancellable background work) when memory/skills arrive later.
342 +7. **Config sprawl and eternal backward compatibility.** Hundreds of keys, migrations, legacy aliases, "older pickles" guards. KHAELOR V1 has a small typed config schema and no legacy to serve.
343 +8. **Spawn-per-call shell emulation as the only foreground mode** — env-snapshot + cwd-tracking works but surprises users (shell functions, aliases, `set -e` state don't persist). KHAELOR should make the tradeoff deliberately and document it, or keep a persistent PTY option for the process manager.
344 +9. **Regex-armory security as the primary defense** (100+ skill threat patterns, 47 command patterns, LLM guardian). Useful layers, but KHAELOR's foundation is capability-based permissions with explicit user consent — deny-by-capability first, pattern heuristics as advisory extras.
345 +10. **Frozen-snapshot memory injection semantics without the caveat.** Freezing memory for cache warmth is right, but Hermes accepts that mid-session memory writes are invisible until next session; if KHAELOR later adds memory, surface that tradeoff in the UI rather than inheriting it silently.
346 +11. **Emoji-and-print status plumbing in the engine** (`_safe_print("\n⚡ Breaking out of tool loop…")`, emoji-decorated tool registry entries). Engine emits typed events; only the TUI decides presentation.
347 +
348 +---
349 +
350 +*Author: Simon-Pierre Boucher · contact@spboucher.ai*
added docs/research/KHAELOR_ARCHITECTURE_DECISIONS.md +230 −0
@@ -0,0 +1,230 @@
1 +<!--
2 +KHAELOR
3 +File: docs/research/KHAELOR_ARCHITECTURE_DECISIONS.md
4 +Author: Simon-Pierre Boucher
5 +Contact: contact@spboucher.ai
6 +-->
7 +
8 +# KHAELOR Architecture Decisions
9 +
10 +> Phase 0 output. Each record: **Decision** / **Evidence from references** / **Trade-offs accepted** / **V1 scope note**. Evidence cites the four analysis documents in `docs/research/`. Where reference evidence pushes against a decision, a clearly-marked **⚠ Concern** is recorded rather than silently changing the decision.
11 +
12 +---
13 +
14 +## ADR-1 — Language & Runtime: TypeScript, Node ≥ 20, npm distribution
15 +
16 +**Decision.** TypeScript in strict mode, targeting Node ≥ 20, shipped as `npm install -g khaelor` → `khaelor`. No Bun hard-dependency. No Electron, no web UI.
17 +
18 +**Evidence.** Hermes is the cautionary tale: choosing Python first for a terminal product forced an 18.7K-line prompt_toolkit REPL, then a full parallel React/Ink TypeScript TUI, then a Python↔Node JSON-RPC bridge process — "KHAELOR starting TypeScript-native skips that entire tax" (HERMES §8.2). Hermes and OpenHands both drown in thread/lock machinery (`FIFOLock`, `_step_holds_state_lock`, compression commit fences, issue-numbered workarounds #3485/#3053) that "evaporates in a single-threaded TS event loop with structured async" (OPENHANDS §9). OpenCode validates the TS/terminal pairing end to end. OpenHands' discriminated-union serialization framework is free in TypeScript tagged unions.
19 +
20 +**Trade-offs accepted.** We forgo Bun's `bun build --compile` single-binary startup story — OpenCode inlines the models catalog into the compiled binary and disables dotenv autoload to protect cold start (OPENCODE §9.11). On plain Node we must earn startup speed with OpenCode's *other* discipline: a codified lazy-import rule and lazy thunks for heavy modules. Bun-compile remains a later distribution optimization, never a runtime dependency.
21 +
22 +**V1 scope note.** One process, one package. Rust native components deferred until a measured bottleneck exists (CLAUDE.md §5).
23 +
24 +---
25 +
26 +## ADR-2 — Kernel: tiny, state-derived agent loop
27 +
28 +**Decision.** The kernel is a small loop that **re-derives "what next" from recorded session state each iteration**: build context → stream model → record events → execute tool calls → record observations → repeat. Exit conditions derive from state, not in-memory flags. The kernel holds no business logic; context, tools, permissions, and persistence are services around it. The stream-event reducer is a separate component from the loop.
29 +
30 +**Evidence.** mini-SWE is the existence proof: a 190-line `DefaultAgent` with eight state fields scores >74% on SWE-bench Verified — "any kernel larger than a few hundred lines is carrying non-kernel work" (MINI §Executive answer). OpenCode's `SessionPrompt.runLoop` shows the production-grade version: each iteration re-reads persisted messages; compaction and subtasks are *persisted parts* popped as tasks; "a crashed process can resume mid-conversation because nothing lives only in loop-local variables"; concurrent prompts join the running loop instead of double-driving it (OPENCODE §4.2). OpenCode separates `SessionProcessor` (pure stream reducer) from `runLoop` — "that *is* the small kernel." The counter-evidence is unanimous: Hermes' 7,740-line loop with inline recovery regions and OpenHands' `Agent.step()` buried under MCP/critics/hooks/vision fallbacks are the same god-object failure from two codebases.
31 +
32 +**Trade-offs accepted.** State-derivation costs a per-iteration projection read; in practice the kernel consults an in-memory projection maintained by the same event reducer that writes the log (rebuilding from the JSONL only on resume), so the property preserved is "derivable from recorded state," not "re-read disk every iteration." mini's exceptions-carrying-messages pattern is adopted as typed control-flow results caught at one loop boundary. Doom-loop detection (OpenCode: 3 byte-identical consecutive tool calls → ask) rides along as a cheap kernel-adjacent check.
33 +
34 +**V1 scope note.** Kernel state: history handle, model client, tool runtime, budget counters, run status — mini's "if a field isn't consulted by the loop itself, it belongs to a service."
35 +
36 +---
37 +
38 +## ADR-3 — Sessions: event-sourced, append-only JSONL
39 +
40 +**Decision.** One append-only JSONL event log per session under `~/.khaelor/sessions/<project-hash>/`. State, UI, and LLM context are projections; resume = replay. No event-tree branching in V1, but the event schema leaves room for a future `parent_id`.
41 +
42 +**Evidence.** OpenHands proves event-log-as-source-of-truth: append-only per-event JSON, conversation state / LLM view / UI all projections, "resume and replay are trivial-by-construction," idempotent init that skips when a SystemPromptEvent already exists (OPENHANDS §2.3, WELL #1). OpenCode proves the same spine over SQLite: durable typed events + atomic projectors, "persistence and streaming are literally the same write" (OPENCODE §2.3). Both storage backends were examined and rejected for V1: OpenHands' file-per-event costs an inode per event plus index-scan/lock-file machinery; OpenCode's SQLite works but adds a DB dependency — and Hermes shows the armor tax that follows (WAL fallback detection, macOS fsync barriers, schema self-repair across 10,888 lines, HERMES §9). Atomic line appends to one file per session capture the durability property (Hermes' incremental mid-turn flushes; mini's `finally`-block save every step) with neither cost. OpenHands' event *tree* works but its own analysis documents the sentinel/legacy-fallback debt (`ROOT_PARENT_ID`, `head_is_empty`, bug #4057) — "ship a linear log; keep `parent_id` cheap future-proofing" (OPENHANDS NOT-COPY #7). OpenHands' resume contract (`AgentBase.verify`: tools add-only, model swappable) is adopted.
43 +
44 +**Trade-offs accepted.** No SQL queries over history — session search/pagination must scan or maintain rebuildable sidecar indices. Derived metadata (title, token totals, cost) must always be recomputable from the log; OpenCode's incremental-counter trick is reproduced as a projection cache, never as separate truth. Version events from day one (OpenCode's `{durable, version}` on event definitions) — never ship a v1/v2 dual architecture (OpenCode's most visible debt).
45 +
46 +**⚠ Concern.** OpenCode's projectors commit event + projection **in the same transaction**; with JSONL we get atomicity only for the log line itself. Accepted consequence: the log is the *sole* truth and every projection must tolerate being stale/rebuilt. Very long sessions also make full replay on resume O(session); if measured to matter, add periodic snapshot events (a natural fit — the compaction checkpoint of ADR-6 already is one), not a database.
47 +
48 +---
49 +
50 +## ADR-4 — Event Bus: in-process, typed, durable/ephemeral split
51 +
52 +**Decision.** An in-process typed event bus carrying the CLAUDE.md §7 vocabulary. Durable events are appended to the session log; ephemeral events (text/thinking/tool-input deltas) flow to the TUI only. Deltas are coalesced ~16 ms into batched renders.
53 +
54 +**Evidence.** OpenCode's event system is the engine's spine: typed pub/sub with durable definitions feeding both projections and SSE clients; the client coalesces SSE events "in a 16 ms window and applied inside Solid's `batch()` — one render per frame regardless of event rate" (OPENCODE §3.3, §9). Hermes' TUI gateway independently converged on the same design: ~40 typed event kinds with streaming deltas coalesced on a 33 ms timer (HERMES §8.1) — a convergent finding, so it is treated as settled. The durable/ephemeral split follows from OpenCode's model, where deltas are `updatePartDelta` events distinct from persisted part upserts. mini-SWE marks the boundary of doing without: "the moment streaming exists, messages-as-the-only-log stops working" (MINI §4). OpenHands supplies the anti-pattern to exclude: `visualize` Rich properties welded onto domain events — rendering lives in the TUI layer, keyed by event type, never on the event.
55 +
56 +**Trade-offs accepted.** Ephemeral deltas are lost on crash mid-block; acceptable because the completed block is recorded durably when the stream event closes it (OpenCode behaves identically). The bus is in-process only (see ADR-17).
57 +
58 +**V1 scope note.** Events carry a session id from day one — the cheap seam ADR-16 depends on.
59 +
60 +---
61 +
62 +## ADR-5 — Streaming: first-class from day one
63 +
64 +**Decision.** Anthropic SDK streaming is the substrate. The kernel consumes `AsyncIterable<ModelEvent>`; the TUI renders deltas. Non-streaming is the degenerate case, never the default.
65 +
66 +**Evidence.** OpenHands is the named anti-pattern: `on_token` callbacks pass raw litellm chunks, silently degrade to non-streaming, and events exist only post-completion — "the architecture is request/response at heart — unacceptable for a terminal UI where streaming is the product" (OPENHANDS POORLY #1). mini-SWE blocks on `litellm.completion` behind a spinner — fine when nobody watches, disqualifying for KHAELOR (MINI Divergence #1: "the single biggest structural divergence"). OpenCode shows the target: provider delta → part-delta event → single-node repaint, 60 fps during full-speed token streams (OPENCODE §9.1).
67 +
68 +**Trade-offs accepted.** Streaming forces the cancellation and steering design of ADR-11 to exist up front; there is no cheap synchronous fallback path to hide behind.
69 +
70 +**V1 scope note.** `ModelStarted · TextDelta · ThinkingDelta · ToolCallStarted · ToolInputDelta · ModelFinished` are all present in the first Anthropic integration (Phase 3).
71 +
72 +---
73 +
74 +## ADR-6 — Context Engine: Hermes' verbs, OpenHands' mechanics, token triggers, structured checkpoint
75 +
76 +**Decision.** The Context Engine exposes Hermes' interface shape — `select_context` / `compress` / `on_turn_complete` / `prune_tool_results_only` — with OpenHands' compaction-as-event mechanics: a `ContextCompacted` event recorded in the log and deterministically re-applied on replay, cutting only at indices where Anthropic tool_use/tool_result pairing survives. Triggers are token-based from **real API usage numbers**. The summary payload is KHAELOR's structured YAML checkpoint (CLAUDE.md §12). Tool-result pruning runs first (cheap, deterministic, no LLM); summarization second.
77 +
78 +**Evidence.** Hermes' `ContextEngine` ABC is "the best-factored component in the codebase" — selection ("this turn belongs to a different context") explicitly orthogonal to compression ("context is too long"), observation (`on_turn_complete`) and cheap pruning as separate verbs, all fed by `update_from_response(usage)` (HERMES §3.3). Its compressor algorithm skeleton (prune tool results → protect head → protect token-budgeted tail → summarize middle on an aux model → iteratively update) is adopted, minus the cross-process lock machinery a single-process V1 doesn't need (HERMES ADOPT #3). OpenHands supplies the structural insight "worth stealing wholesale": a `Condensation` is an event in the log; the View re-applies it deterministically; `manipulation_indices` guarantee API-safe cuts; condensation doubles as the recovery path for context-window errors — dual proactive/reactive triggers (OPENHANDS §8). OpenHands' weakness is named and corrected: it triggers on **event count** (240), not tokens (OPENHANDS POORLY #7); OpenCode demonstrates the correct budget arithmetic — real usage tokens vs. usable window minus a reserved compaction buffer, plus a separate cheaper `prune()` protecting the newest 40K tokens of tool output (OPENCODE §7). mini-SWE's cliff (context overflow = fatal abort) is the failure mode this ADR exists to prevent.
79 +
80 +**Trade-offs accepted.** A structured YAML checkpoint is more prescriptive than OpenCode/OpenHands' free-text summaries — it may occasionally fit a session awkwardly, but it makes `/context` inspectable and preserves the fields that free-text summaries destroy (failed_attempts, running_processes, decisions). Preserve important raw evidence alongside the checkpoint when summarization would destroy it.
81 +
82 +**V1 scope note.** `select_context` ships as a pass-through hook in V1 (no retrieval/topic routing yet); the verb exists so repository intelligence can plug in without interface change.
83 +
84 +---
85 +
86 +## ADR-7 — Prompt Caching: byte-stability as a design invariant
87 +
88 +**Decision.** Prompt-cache byte-stability is a system-wide invariant, not an optimization: the system prompt is built once per session in stable tiers; history is never rewritten (compaction, recorded as an event, is the sole sanctioned break); volatile per-turn context is injected only into the API-copy of the current message; Anthropic `cache_control` breakpoints are planned deliberately.
89 +
90 +**Evidence.** This is Hermes' strongest lesson, stated as its first governing invariant ("per-conversation prompt caching is sacred") and implemented everywhere: the three-tier system prompt whose docstring reads "Hermes never re-renders parts of this string mid-session — that's the only way to keep upstream prompt caches warm"; the `api_content` sidecar replaying byte-exact historical sends; memory injected as a frozen snapshot; per-turn ephemeral context confined to the API copy of the current user message (HERMES §3.1–3.2, WELL #1). OpenHands independently converged: static cacheable system block vs. dynamic uncached block, "should NOT be included in the cached system prompt to enable cross-conversation cache sharing" (OPENHANDS §1.5). OpenCode applies ephemeral cacheControl breakpoints plus a session-scoped promptCacheKey (OPENCODE §7, §9.9). Even 164-line mini-SWE auto-enables cache control for Anthropic-looking models (MINI §3.1). Four for four.
91 +
92 +**Trade-offs accepted.** Anything volatile (timestamps, git status, running-process lists) must live in the dynamic tier or the current-message injection — never interleaved in history. This constrains how repository context is delivered and must be enforced by tests, since a single careless mutation silently destroys the economics.
93 +
94 +**V1 scope note.** Cache read/write tokens surface in `/cost` from real usage fields, making cache health observable (Absolute Rule #4).
95 +
96 +---
97 +
98 +## ADR-8 — Tools: seven primitives, replacer-cascade edit, model-facing process manager
99 +
100 +**Decision.** Exactly `read / write / edit / grep / glob / bash / process`. Few parameters (≤5) with rich descriptions. `edit` is a replacer cascade of matching strategies (OpenCode's nine-strategy cascade as the reference) with OpenHands-quality failure messages (line-number hints, "maybe you meant", post-edit snippet). Long output: head/tail truncation with spill-to-file paths returned to the model. `bash` and `process` are strictly separated; the process manager is **model-facing** (`process.start/list/read/write/stop`).
101 +
102 +**Evidence.** Tool-count calibration: Hermes' ~93 tools required a `tool_search` bridge to cope with its own surface (HERMES POORLY #4); mini-SWE's single bash tool scores >74% but is "brutal for interactive use — a one-character `sed` mistake silently corrupts files, no diffs, no ambiguity detection" (MINI §4) — CLAUDE.md's ~7 primitives is where the evidence lands. Schema discipline: OpenCode's `edit` has 4 params with guidance in description text files (OPENCODE §6.1). The edit cascade: nine strategies (exact → line-trimmed → block-anchor Levenshtein → whitespace-normalized → indentation-flexible → escape-normalized → trimmed-boundary → context-aware → multi-occurrence) with uniqueness and disproportionate-match guards, CRLF/BOM preservation, and repair-prose errors — "adopt wholesale" (OPENCODE §6.2, ADOPT #3); layered with OpenHands' failure UX: multiple-occurrence errors citing line numbers, "Maybe you meant {cwd/path}?", post-edit snippet so the model self-verifies without a re-read, per-file undo history (OPENHANDS §4.2). Output economics are a Hermes/OpenCode/OpenHands convergent finding: head/tail truncation with explicit omission markers and full output spilled to a path the model can `read`/`grep` (HERMES §6.3, OPENCODE §6.1, OPENHANDS §4.3). The process manager: Hermes' `terminal`+`process` pair "validates KHAELOR's §10 design almost line for line" — rolling buffers, poll/log pagination, crash checkpoints with PID-reuse guards, a hard foreground-timeout ceiling that *redirects* long commands to background (HERMES §6.1–6.2, ADOPT #8); OpenCode's biggest tool-level gap is precisely this omission ("do not inherit the omission", OPENCODE NOT-COPY #10); OpenHands' soft-timeout `exit_code=-1` convention is explicitly rejected as the primary mechanism (OPENHANDS NOT-COPY #9). Adopt mini's process-group-kill hygiene inside it (MINI Divergence #4).
103 +
104 +**Trade-offs accepted.** Seven tools means no `git` tool in V1 (git flows through `bash` under permission rules; re-evaluate per CLAUDE.md §10). A model-facing process manager adds schema weight and permission surface that OpenCode chose to avoid — accepted, because dev-server workflows are a stated differentiator.
105 +
106 +**V1 scope note.** LSP-diagnostics feedback in edit results (OpenCode) is a strong idea deferred beyond V1; the spill-file directory lives under `~/.khaelor/` with size caps.
107 +
108 +---
109 +
110 +## ADR-9 — Permissions: capability rules, last-match-wins, persisted grants
111 +
112 +**Decision.** Capability-based permissions (`file.read`, `file.write.project`, `process.execute`, `filesystem.outsideProject`, `network.access`, `git.modify`) with `allow / ask / deny`; last-match-wins wildcard rules. Bash commands are parsed to generate precise "always allow `git push *`" suggestions — conservative shell-word parsing in V1, tree-sitter later. "Always allow" decisions are **persisted** to project config. Elegant inline permission panel per CLAUDE.md §13.
113 +
114 +**Evidence.** OpenCode's evaluator is the elegance benchmark: `{permission, pattern, action}` triples, "evaluation = last matching rule wins with wildcard matching… a 4-line `findLast`", capability-ish keys (`write` folds into `edit`), and deny rules deriving tool visibility so modes are pure policy (OPENCODE §8.1, WELL #3). Its arity dictionary turns approvals into human-meaningful generalizations — "the difference between a permission system users tolerate and one they like" (OPENCODE §8.2, ADOPT #5). Its named flaw is fixed here: v1 `always` approvals are in-memory per session, so "users re-approve across restarts" — KHAELOR persists scoped grants from day one (OPENCODE POORLY #4, NOT-COPY #7). From Hermes: a small unbypassable hardline deny floor beneath the rule system, matched against de-obfuscated variants, "silence is not consent" timeout semantics, and refusing always-allow entries containing shell operators (HERMES §6.5, ADOPT #10) — while rejecting its regex-armory-as-primary-defense posture (HERMES NOT-COPY #9). From OpenHands: pending approval represented as persisted unexecuted action events (approvals survive restarts for free), rejection reasons fed back to the model as observations, read-only short-circuit; its LLM self-assessed risk is rejected as the gate — "deterministic capability rules first" (OPENHANDS §6, ADOPT #5, NOT-COPY #10). mini confirms the evaluator itself can be ~10 lines (MINI §5).
115 +
116 +**Trade-offs accepted.** Conservative shell-word parsing will under-generalize on compound commands (pipelines, `&&` chains, subshells) — V1 mitigates by refusing to suggest "always" patterns for commands containing shell operators (Hermes' guard) and falling back to exact-command approval. **⚠ Concern:** OpenCode's evidence shows tree-sitter parsing also powers `external_directory` escape detection on filesystem verbs; shell-word parsing is weaker here, so V1's `filesystem.outsideProject` checks are best-effort on complex commands. Tree-sitter is the planned upgrade, not a maybe.
117 +
118 +**V1 scope note.** Rejection-with-feedback (denial text delivered to the model as steering, OpenCode's `CorrectedError`) ships in V1 — it converts denials from dead ends into course corrections.
119 +
120 +---
121 +
122 +## ADR-10 — Model Layer: one `ModelClient` over the official Anthropic SDK
123 +
124 +**Decision.** A single `ModelClient` interface (`stream(request): AsyncIterable<ModelEvent>`) over the official Anthropic SDK. Typed error taxonomy (retryable / fatal / context-overflow), retries with backoff, cancellation via AbortSignal propagation, cost/token accounting **only** from real API usage fields. No litellm-style universal adapter, no provider framework.
125 +
126 +**Evidence.** Provider generality is the quantified villain of every reference: Hermes' "provider sprawl is the single largest complexity driver" — credential pools, failover chains, per-provider sanitizers scattered through the loop (HERMES §10.4); OpenHands' 2,300-line litellm wrapper with four near-duplicate call paths — "precisely what `ModelClient` must *not* become" (OPENHANDS §7); OpenCode's model-family prompt files and transform matrices (OPENCODE POORLY #7). The transferable ideas are exactly three, present in all references: (1) a typed exception taxonomy the kernel branches on (OpenHands' `LLMContextWindowExceedError` et al. mapped to distinct kernel reactions; Hermes' `ClassifiedError{retryable, should_compress, …}` consumed as hints); (2) honest accounting — cache read/write tokens from real usage metadata, aggregated per session (OPENHANDS §7 Telemetry; mini's "hard failure if cost cannot be computed"); (3) retry with backoff at the model layer, `finish_reason`-aware error messages (MINI §5). Internal message/event types model Anthropic semantics directly — no OpenAI-dict lingua franca (Hermes' leakiest abstraction, HERMES NOT-COPY #2).
127 +
128 +**Trade-offs accepted.** Adding a second provider later means real work at this boundary. Accepted deliberately: `ModelClient` exists for clean architecture, not multi-provider readiness (CLAUDE.md §6). The auxiliary-model seam (Hermes ADOPT #14) is kept: one interface, two configured Anthropic model IDs — compaction summaries route to a cheaper model.
129 +
130 +**V1 scope note.** Context-overflow errors route to the Context Engine (reactive compaction trigger, ADR-6); never retried blindly.
131 +
132 +---
133 +
134 +## ADR-11 — Interruption & Steering
135 +
136 +**Decision.** `Esc` cancels: the model stream is aborted, running tools cancelled, and dangling `tool_use` blocks closed with synthetic cancelled `tool_result`s — history is protocol-valid at all times. Steering: user messages typed mid-run are queued and injected at safe boundaries (appended after tool results, never breaking role alternation), displayed as `Queued instruction`.
137 +
138 +**Evidence.** Convergent across the two mature implementations. Hermes: `interrupt()` force-closes sockets and cancelled tools get synthetic `[Tool execution cancelled …]` results with correct `tool_call_id`s "so history stays valid"; `steer()` drains at exactly two seams — pre-API-call (appended to the last tool message, "since injecting a user message would break role alternation") and post-tool-batch (HERMES §2.7, WELL #4). OpenCode: `Effect.onInterrupt` marks the assistant message aborted, a 250 ms grace for in-flight tools, and interrupted tool parts converted to "[Tool execution was interrupted]" results "so Anthropic never sees a dangling `tool_use`" (OPENCODE §4.2, ADOPT #10). mini contributes the UX seed — Ctrl-C becomes a steering comment — while its own analysis notes that with streaming and background processes this becomes "a genuinely new design, not an extension of mini's" (MINI Divergence #10). Cancellation propagates as an AbortSignal tree (ADR-10), not thread flags (Hermes' `_interrupt_requested` checked at scattered points is the pattern to avoid).
139 +
140 +**Trade-offs accepted.** Steering injected only at tool-result boundaries means a long uninterrupted text stream cannot be steered until it completes or is cancelled — the price of never corrupting alternation. Interruption must not kill `process`-managed background processes (they are explicitly long-lived); only in-flight tool calls are cancelled.
141 +
142 +**V1 scope note.** Queued steering ships in V1 (CLAUDE.md §23); `redirect` (Hermes' third verb — rewrite the active objective) is noted but not V1.
143 +
144 +---
145 +
146 +## ADR-12 — Completion: verification-on-stop gate
147 +
148 +**Decision.** When the model stops with code changed this turn and no fresh verification evidence exists, the kernel nudges it (synthetic message carrying detected verify commands) to run relevant checks — max 2 attempts — before accepting completion. Completion is internally represented as a `CompletionEvidence` record (CLAUDE.md §17).
149 +
150 +**Evidence.** Hermes proved this design in production: `verification_stop.py` checks whether code files changed this turn lack fresh passing evidence, injects an evidence-bearing nudge with detected verify commands, caps at `max_attempts=2`, filters documentation-only changes, and **preserves the withheld candidate answer** so budget exhaustion returns it rather than losing it — "the closest existing implementation of KHAELOR's `CompletionEvidence` idea… it works by nudging the model with evidence, not by trusting the model's confidence" (HERMES §2.8, WELL #3, ADOPT #4). mini-SWE supplies the negative proof: its magic-string completion (`COMPLETE_TASK_AND_SUBMIT_FINAL_OUTPUT` sniffed from stdout) is "spoofable by any command output" — completion must be a structured signal the kernel verifies before it believes (MINI Divergence #7).
151 +
152 +**Trade-offs accepted.** OpenHands takes a different path — an explicit `FinishTool` call, optionally vetoed by a critic (OPENHANDS §1.4). KHAELOR follows Hermes' stop-without-tool-calls + gate instead: it needs no extra tool schema and the gate supplies the rigor. Noted honestly: an explicit finish tool makes intent unambiguous; if end-without-tools proves ambiguous in dogfooding, a finish signal can be added without kernel changes. Only checks relevant to the repository run — never blind full test suites (CLAUDE.md §17).
153 +
154 +**V1 scope note.** The withheld-answer preservation detail is in scope — it prevents the gate from ever destroying a model response.
155 +
156 +---
157 +
158 +## ADR-13 — Workspace: four methods, local only
159 +
160 +**Decision.** The `Workspace` interface from CLAUDE.md §9 (`cwd / readFile / writeFile / exec`); `LocalWorkspace` is the only V1 implementation. Tools depend on `Workspace`, never on Node fs/process globals directly.
161 +
162 +**Evidence.** mini-SWE demonstrates the leverage of a thin seam: a 3-method `Environment` protocol lets local↔Docker↔Singularity swap in ~100–150 lines each "with zero kernel changes" (MINI §2). OpenHands demonstrates the failure to avoid: it *has* `BaseWorkspace`, but tools bypass it and open files directly — sandboxing then requires relocating the whole agent behind a FastAPI server with ~25 routers (OPENHANDS §3). Hermes has the seam for terminal execution only; file tools touch the local FS everywhere — "the world is not one seam" (HERMES POORLY #6). The lesson recorded in the OpenHands analysis: keep the interface thin so the future remote strategy is "run KHAELOR's core remotely," not "proxy every syscall" (OPENHANDS §3).
163 +
164 +**Trade-offs accepted.** Four methods will not cover everything tools want (globbing, stat, watch); those live in tool-side helpers *parameterized by* the Workspace rather than fattening the interface prematurely. Docker/SSH explicitly not implemented (CLAUDE.md §9).
165 +
166 +**V1 scope note.** A lint/test guard should flag direct `node:fs`/`child_process` imports outside `workspace/` and approved shared modules.
167 +
168 +---
169 +
170 +## ADR-14 — TUI: framework decided by a Phase 1 prototype spike; techniques fixed now
171 +
172 +**Decision.** The TUI framework is the one decision requiring a Phase 1 prototype spike. Candidates: (a) React + Ink, (b) SolidJS + `@opentui` (OpenCode's engine — **verify Node-without-Bun compatibility**), (c) a minimal custom ANSI renderer with settled-block streaming. Recorded decision criteria: flicker-free streaming; stable input line during streams; <16 ms input latency; Node-only compatibility; markdown + syntax-highlight + diff quality; memory in long sessions; terminal selection/copy preserved. Adopted regardless of framework: settled-block incremental markdown streaming, ~16 ms delta coalescing into batched renders, a bounded live-render region, width-responsive status bar, virtualized or capped scrollback **without** OpenCode's hard 100-message UX cliff.
173 +
174 +**Evidence.** The techniques are convergent, framework-independent findings. Hermes `ui-tui/`: `StreamScanState` freezes settled top-level markdown blocks and re-parses only the live tail ("explicitly avoiding O(blocks²) re-tokenization"); hard live-region caps (16K chars / 240 lines — unbounded trails OOM-killed Node, issue #34095); virtualized scrollback; width-responsive status segments with pre-reserved spinner width; 33 ms coalescing (HERMES §8.2, ADOPT #12). OpenCode: delta-only part updates → fine-grained single-node repaints; 16 ms coalescing inside `batch()`; 60 fps under full token streams; terminal-reality hardening (kitty keyboard, palette-derived theme, selection-safe dialogs, win32 FFI fixes) (OPENCODE §3, §9). OpenCode's 100-message cap is explicitly rejected: "long sessions silently drop scrollback from the UI" (OPENCODE POORLY #9, NOT-COPY #6). Framework risk is real on both sides: stock Ink required Hermes to vendor a ~100-file fork (ScrollBox, mouse, selection); opentui is developed inside a Bun monorepo with patched deps, so Node-without-Bun compatibility is unproven — hence a spike, not a bet. OpenCode's composer (extmark-backed structured parts, frecency mentions, collapsed pastes, `$EDITOR` round-trip) is the reference standard for the Phase 2 composer regardless of framework (OPENCODE §3.5).
175 +
176 +**Trade-offs accepted.** A spike costs Phase 1 time; the alternative — discovering flicker, input-latency, or Bun-dependency problems in Phase 2 — costs more. If both ecosystems fail the criteria, option (c) is viable precisely because the adopted techniques (settled blocks + bounded live region) are what make a custom renderer tractable.
177 +
178 +**V1 scope note.** One exceptional default theme; `NO_COLOR` and monochrome-meaningful symbols from the start (CLAUDE.md §19).
179 +
180 +---
181 +
182 +## ADR-15 — Git Awareness: baseline capture and attribution; shadow git deferred
183 +
184 +**Decision.** Record baseline git state (branch, dirty files, diff hash) at session start and before the first edit; attribute changes (KHAELOR's vs. pre-existing); never auto-commit. OpenCode-style shadow-git snapshots are noted as a strong post-V1 candidate and deferred.
185 +
186 +**Evidence.** OpenCode's shadow repository is the standout mechanism: a separate git dir against the real work tree, `objects/info/alternates` + copied index making snapshots "near-free even on huge repos", tree hashes recorded per step, powering revert/unrevert and the diff viewer, fully invisible to the user's `git status` (OPENCODE §5.3, WELL #6, ADOPT #7). Nothing comparable exists in the other references (Hermes detects changed files only to feed verification; mini has nothing) — which also shows agents function correctly with baseline-recording alone. CLAUDE.md §16's guarantees (never assume a diff belongs to KHAELOR; protect user work) are satisfied by baseline capture + attribution without the shadow-repo machinery.
187 +
188 +**Trade-offs accepted.** Without snapshots there is no `revert`/`unrevert` in V1 — undo relies on the user's own git hygiene plus the edit tool's per-file history (ADR-8). Deferring is a scope decision, not a quality judgment; the design keeps snapshot hashes representable as events so shadow git can slot in later.
189 +
190 +**V1 scope note.** Baseline events are durable log entries, so attribution survives resume.
191 +
192 +---
193 +
194 +## ADR-16 — Subagents / Memory / Skills / MCP: not V1, seams reserved
195 +
196 +**Decision.** None of subagents, memory, skills, or MCP ship in V1. The event log and kernel service boundaries leave room: events carry a session id; the tool registry is data-driven. No premature abstraction beyond that.
197 +
198 +**Evidence.** mini-SWE is the existence proof that the entire layer is unnecessary for strong coding performance today: no planner, no subagents, no memory — >74% SWE-bench Verified ("strong evidence this whole layer is accidental complexity at current model capability", MINI §5). The cost side is equally documented: Hermes' memory/skills complex is ~10K+ lines (background review, curator, hub, sync, guard, provenance — HERMES NOT-COPY #6); OpenHands' six extension systems interleaved with the core are exactly what bloated `Agent.step()` and `LocalConversation` (OPENHANDS §9). The seams that make later addition cheap are already validated: OpenCode's subagents are just child *sessions* with derived permissions — trivially expressible once events carry session ids (OPENCODE §4.3); Hermes' background-review lessons (aux model, cache-warm replay, cancel on new live turn) are recorded for the future memory system (HERMES NOT-COPY #6).
199 +
200 +**Trade-offs accepted.** Some tasks would benefit from an `explore`-style read-only subagent (OpenCode) in V1; declined to protect scope. Fresh-context child sessions (both references) will be the model when it comes — with Hermes' "no parent context" weakness noted for correction.
201 +
202 +**V1 scope note.** Matches CLAUDE.md §23's NOT-V1 list exactly.
203 +
204 +---
205 +
206 +## ADR-17 — Anti-scope: no multi-provider, no daemon split, no plugins, no Docker/SSH
207 +
208 +**Decision.** Reaffirmed exclusions: no multi-provider machinery; no daemon/server split (in-process event bus — OpenCode's worker/RPC split noted as unnecessary for a V1 single client); no plugin system; no Docker/SSH.
209 +
210 +**Evidence.** Each exclusion is priced by a reference. Multi-provider: Hermes' largest complexity driver (HERMES §10.4); OpenHands' 2,300-line adapter (OPENHANDS POORLY #5). Server split: OpenCode runs client/server *in one process* via worker RPC — proof the layering matters, not the socket; its own analysis concludes "keeping the kernel behind an internal typed API/event boundary preserves KHAELOR's clean layering without daemon complexity" (OPENCODE §2.1, ADOPT #12). OpenHands' agent-server (~25 FastAPI routers, PyInstaller specs) is "pure liability for a terminal-native tool" (OPENHANDS §9). Plugins: OpenHands' six extension systems and OpenCode's plugin-slot sidebar are both flagged premature-for-V1 in their analyses. Docker/SSH: Hermes and mini both show environments bolt onto a thin exec seam later (ADR-13 preserves it).
211 +
212 +**Trade-offs accepted.** **⚠ Concern (recorded honestly):** OpenCode's worker split delivers a real property KHAELOR gives up — "a render-thread stall never blocks tool execution and vice versa" (OPENCODE §2.1). In one Node process, heavy rendering and tool I/O share the event loop. Mitigations: the bounded live-render region and 16 ms coalescing (ADR-14) keep render work small; the internal bus/API boundary is kept clean so moving the engine into a `worker_thread` later is a packaging change, not a rewrite. If Phase 8 latency measurements show contention, that is the sanctioned escape hatch — measure first (CLAUDE.md §18).
213 +
214 +**V1 scope note.** `khaelor serve` / remote attach / IDE clients are all out; the event bus vocabulary is the only "API".
215 +
216 +---
217 +
218 +## Summary of flagged concerns
219 +
220 +| ADR | Concern |
221 +|---|---|
222 +| ADR-3 | JSONL loses OpenCode's transactional event+projection atomicity; projections must be rebuildable, and long-session replay may need snapshot events. |
223 +| ADR-9 | V1 shell-word parsing is weaker than OpenCode's tree-sitter for compound commands and `external_directory` escape detection; mitigated by operator-guard + exact-command fallback; tree-sitter is a planned upgrade. |
224 +| ADR-12 | OpenHands' explicit `FinishTool` contradicts stop-inference; Hermes' production evidence supports the chosen gate, but a finish signal remains addable if dogfooding shows ambiguity. |
225 +| ADR-14 | `@opentui` Node-without-Bun compatibility unproven; stock Ink historically required forking — hence the mandated spike. |
226 +| ADR-17 | Single-process design forfeits OpenCode's UI/engine thread isolation; clean bus boundary keeps a later `worker_thread` move cheap. |
227 +
228 +---
229 +
230 +*Author: Simon-Pierre Boucher · contact@spboucher.ai*
added docs/research/MINI_SWE_ANALYSIS.md +220 −0
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1 +<!--
2 +KHAELOR
3 +File: docs/research/MINI_SWE_ANALYSIS.md
4 +Author: Simon-Pierre Boucher
5 +Contact: contact@spboucher.ai
6 +-->
7 +
8 +# mini-SWE-agent — Phase 0 Analysis
9 +
10 +> **Guiding question: HOW LITTLE AGENT SCAFFOLDING IS ACTUALLY NECESSARY?**
11 +>
12 +> Reference: `references/mini-swe-agent/` (version 2.4.6, per `src/minisweagent/__init__.py`).
13 +> Built by the Princeton/Stanford SWE-bench team. README claim: **>74% on SWE-bench Verified** with this scaffolding.
14 +
15 +## 0. Executive answer
16 +
17 +The *entire* competitive core of mini-swe-agent is roughly **585 lines of Python**:
18 +
19 +| Component | File | Lines |
20 +|---|---|---|
21 +| Agent loop + config | `src/minisweagent/agents/default.py` | 190 |
22 +| Exceptions (control flow) | `src/minisweagent/exceptions.py` | 26 |
23 +| Local environment | `src/minisweagent/environments/local.py` | 92 |
24 +| LiteLLM model wrapper | `src/minisweagent/models/litellm_model.py` | 164 |
25 +| Tool-call parsing/formatting | `src/minisweagent/models/utils/actions_toolcall.py` | 113 |
26 +
27 +Everything else in the package (~5,350 total lines) is *alternatives and periphery*: extra model backends (OpenRouter, Portkey, Requesty, Responses API), extra environments (Docker, Singularity, bubblewrap, SWE-ReX), run scripts, benchmark harnesses, and a trajectory inspector. The project's own `AGENTS.md` states its thesis explicitly: *"The idea of this project is to write the simplest, smallest, most readable agent"* and *"The project embraces polymorphism: every individual class should be simple, but we offer alternatives."*
28 +
29 +The lesson is not "agents need 200 lines." The lesson is **which 200 lines are the kernel, and that everything else can be a swappable component around it** — which is exactly KHAELOR's Absolute Rule #3.
30 +
31 +---
32 +
33 +## 1. The core agent class (`agents/default.py`, 190 lines)
34 +
35 +### 1.1 State
36 +
37 +`DefaultAgent.__init__` (lines 39–50) holds the *complete* agent state — eight fields:
38 +
39 +```python
40 +self.config = config_class(**kwargs) # pydantic AgentConfig
41 +self.messages: list[dict] = [] # the ONLY conversation state
42 +self.model = model # Model protocol
43 +self.env = env # Environment protocol
44 +self.extra_template_vars = {}
45 +self.cost = 0.0
46 +self.n_calls = 0
47 +self.n_consecutive_format_errors = 0
48 +self._start_time = time.time()
49 +```
50 +
51 +There is no session object, no event bus, no context engine, no tool registry, no planner. `self.messages` — a flat list of dicts — *is* the session, the history, the context, and the persistence format simultaneously.
52 +
53 +`AgentConfig` (lines 19–35) is equally minimal: `system_template`, `instance_template`, `step_limit` (default 0 = unlimited), `cost_limit` (default $3.00), `wall_time_limit_seconds`, `max_consecutive_format_errors` (default 3), `output_path`.
54 +
55 +### 1.2 The loop
56 +
57 +`run()` (lines 88–124) is the fundamental loop. Reconstructed:
58 +
59 +```python
60 +def run(self, task, **kwargs) -> dict:
61 + self.messages = []
62 + self.add_messages(system_msg, instance_msg) # Jinja2-rendered templates
63 + while True:
64 + try:
65 + self.step() # step() = execute_actions(self.query())
66 + except FormatError as e: ... # append corrective message, count strikes
67 + except InterruptAgentFlow as e: ... # append exception's messages
68 + except Exception as e: ... # record, re-raise
69 + finally:
70 + self.save(self.config.output_path) # trajectory saved EVERY step
71 + if self.messages[-1].get("role") == "exit":
72 + break
73 + return self.messages[-1].get("extra", {})
74 +```
75 +
76 +`step()` is one line (line 126–128): `return self.execute_actions(self.query())`. That is the whole "query model → execute actions → return observations → repeat" cycle:
77 +
78 +- `query()` (lines 130–152): checks step/cost/time limits (raising `LimitsExceeded`/`TimeExceeded`), calls `self.model.query(self.messages)` — the **entire** message list, every turn — accumulates cost from real API metadata, appends the assistant message.
79 +- `execute_actions()` (lines 154–157): `outputs = [self.env.execute(action) for action in message["extra"]["actions"]]`, then appends observation messages formatted by the model class.
80 +
81 +### 1.3 Exceptions as control flow — the key trick
82 +
83 +`exceptions.py` (26 lines) defines a tiny hierarchy rooted at `InterruptAgentFlow`, whose constructor **carries messages**: `Submitted`, `LimitsExceeded`, `TimeExceeded(LimitsExceeded)`, `UserInterruption`, `FormatError`.
84 +
85 +Every non-linear event — task completion, budget exhaustion, malformed model output, Ctrl-C — is expressed as *"raise an exception that carries the messages to append."* The `run()` loop catches them, appends the messages, and loops. Termination is purely data-driven: the loop exits when the last message has `role == "exit"` (line 122). No state machine, no status enums, no `is_done` flags scattered across classes.
86 +
87 +Consequences:
88 +
89 +- **Completion detection lives in the environment, not the agent.** `LocalEnvironment._check_finished` (`environments/local.py:45–56`) raises `Submitted` when a command's first output line is exactly `COMPLETE_TASK_AND_SUBMIT_FINAL_OUTPUT` with returncode 0. The agent has no completion logic at all; the prompt (`config/mini.yaml`) instructs the model to `echo COMPLETE_TASK_AND_SUBMIT_FINAL_OUTPUT` when done. This is a magic-string protocol — clever, fragile, and benchmark-oriented.
90 +- **Format violations are self-healing.** `FormatError` (raised by parsers in `models/utils/actions_toolcall.py` / `actions_text.py`) carries a templated corrective user message (`format_error_template` in `mini.yaml`, which even distinguishes `finish_reason == "length"` truncation from genuine mistakes). `run()` appends it and re-queries. `max_consecutive_format_errors` (3) converts repeated failure into a `RepeatedFormatError` exit — a strike system in ~15 lines (`default.py:100–114`). Note the subtlety at line 102: the failed call's cost is still charged.
91 +- **Limits are checked at the top of `query()`** (lines 132–147), not in a supervisor. A second global layer, `GlobalModelStats` (`models/__init__.py:13–42`, thread-safe, env-var-driven), guards multi-agent/batch runs.
92 +
93 +### 1.4 Persistence
94 +
95 +`serialize()`/`save()` (lines 159–190) dump `{info, messages, trajectory_format}` to JSON after **every** step (`finally` block). Crash-safe trajectories for free — but this is *recording*, not *resumption*: there is no code path that loads a trajectory back into a live agent. `run/utilities/inspector.py` (316 lines, Textual) is a read-only trajectory browser.
96 +
97 +### 1.5 The interactive layer is a subclass, not a framework
98 +
99 +`agents/interactive.py` (209 lines) shows how far the small kernel stretches: `InteractiveAgent(DefaultAgent)` adds three modes (`human` / `confirm` / `yolo`), a regex `whitelist_actions` list, Ctrl-C steering (`step()` override catches `KeyboardInterrupt` and raises `UserInterruption` carrying the user's typed comment), confirm-before-exit ("agent wants to finish — type a new task or Enter to quit", `_check_for_new_task_or_submit`), and slash commands (`/y`, `/c`, `/u`, `/m`, `/h`) — all by overriding `add_messages`, `query`, `step`, and `execute_actions`. The entire "permission system" is `_should_ask_confirmation` (lines 162–163): one mode check plus one regex whitelist scan.
100 +
101 +---
102 +
103 +## 2. The environment abstraction
104 +
105 +The `Environment` protocol (`src/minisweagent/__init__.py:61–70`) is three methods: `execute(action, cwd) -> dict`, `get_template_vars()`, `serialize()`. Protocol-based duck typing — no base classes, no inheritance requirements.
106 +
107 +### 2.1 LocalEnvironment (`environments/local.py`, 92 lines)
108 +
109 +- **Yes, `subprocess` with `shell=True`** — `_run()` (lines 72–92) uses `subprocess.Popen(command, shell=True, text=True, ..., stdout=PIPE, stderr=STDOUT, start_new_session=os.name == "posix")`.
110 +- **stderr merged into stdout** — one output stream, one observation field.
111 +- **Process-group kill on timeout** (default 30s): `os.killpg(process.pid, signal.SIGKILL)` so children aren't orphaned, then `TimeoutExpired` is re-raised *with the partial output attached* — the model sees what happened before the kill.
112 +- **Every command runs in a fresh subshell.** No persistent shell session — `cd` and env vars do not survive between actions. Rather than engineering a PTY session manager, the system prompt (`config/mini.yaml:39–40`) tells the model: *"Directory or environment variable changes are not persistent... you can prefix any action with `MY_ENV_VAR=... cd /path && ...`"*. A hard engineering problem converted into one sentence of prompt.
113 +- **Observations are plain dicts**: `{"output": str, "returncode": int, "exception_info": str}`. Exceptions during execution (including timeouts) are folded into the same dict shape with `returncode: -1` (lines 31–41) — the model always receives a uniform observation.
114 +
115 +### 2.2 Observation formatting is a config template, not code
116 +
117 +The dict is rendered into the message by a Jinja2 `observation_template` owned by the *model* config (`litellm_model.py:40–44`, overridden in `config/mini.yaml:112–128`). The production template emits JSON-ish text and performs the **only "context management" in the whole system**: outputs over 10,000 chars are truncated to `output_head` (first 5,000) + `output_tail` (last 5,000) + `elided_chars` + a warning — in the template, not in Python.
118 +
119 +### 2.3 Other environments
120 +
121 +`DockerEnvironment` (`environments/docker.py`, 161 lines): starts a long-lived container running `sleep 2h` (`_start_container`), then each action is `docker exec -w cwd <container> bash -lc <command>`. Same observation shape, same `_check_finished` magic string, `cleanup()` via `__del__`. `environments/singularity.py`, `extra/bubblewrap.py`, `extra/swerex_docker.py`, `extra/swerex_modal.py`, `extra/contree.py` are drop-in alternatives. Because the interface is one `execute()` method, adding an environment costs ~100–150 lines each.
122 +
123 +---
124 +
125 +## 3. The model abstraction
126 +
127 +The `Model` protocol (`__init__.py:43–58`): `query(messages) -> dict`, `format_message(**kw)`, `format_observation_messages(message, outputs, template_vars)`, `get_template_vars()`, `serialize()`.
128 +
129 +Notably, in v2 the **model class owns action parsing and observation formatting** — the agent never touches wire formats. The agent reads `message["extra"]["actions"]` and hands raw output dicts back to the model for formatting. This is how one 190-line agent supports both native tool-calling and text-based protocols unchanged.
130 +
131 +### 3.1 LitellmModel (`models/litellm_model.py`, 164 lines)
132 +
133 +- `litellm.completion(model=..., messages=..., tools=[BASH_TOOL], ...)` — **exactly one tool** is advertised: `BASH_TOOL` (`models/utils/actions_toolcall.py:11–27`), schema = a single required `command: string`. The whole tool surface area is one function with one parameter.
134 +- `query()` (lines 81–106): retry loop (`models/utils/retry.py`, 25 lines, tenacity-style with `abort_exceptions` including `ContextWindowExceededError` and `AuthenticationError`), cost calculated from litellm's cost calculator with a **hard failure if cost cannot be computed** (`_calculate_cost`, lines 108–126 — "never fabricate/ignore cost" as a default), parsed actions plus the full raw response stashed under `message["extra"]`.
135 +- `_prepare_messages_for_api()` strips the internal `extra` key, reorders Anthropic thinking blocks (`models/utils/anthropic_utils.py`), and applies **prompt cache control**: `get_model()` (`models/__init__.py:56–60`) auto-enables `set_cache_control: "default_end"` whenever the model name looks like Anthropic — cache breakpoints handled in `models/utils/cache_control.py` (67 lines).
136 +- **No streaming anywhere.** Blocking `litellm.completion`; the interactive agent shows a Rich spinner ("Waiting for the LM to respond...", `interactive.py:73`).
137 +
138 +### 3.2 Templating: Jinja2 + StrictUndefined everywhere
139 +
140 +Every string the model sees is a Jinja2 template rendered with `StrictUndefined` (typo in a variable = crash, not silent empty string): `system_template`, `instance_template`, `observation_template`, `format_error_template`. Template variables come from `DefaultAgent.get_template_vars()` (`default.py:52–64`), which `recursive_merge`s the agent config, environment vars (`LocalEnvironment.get_template_vars` includes `platform.uname()` and `os.environ`), model config, and live counters (`n_model_calls`, `model_cost`, `elapsed_seconds`). This lets `mini.yaml` do things like emit macOS-specific `sed -i ''` guidance (`{%- if system == "Darwin" -%}`, lines 69–73).
141 +
142 +**The prompt is the product.** `config/mini.yaml` is 151 lines — comparable in size to the agent itself — encoding the workflow (reproduce → fix → verify → submit), the subshell semantics, file-creation via heredoc, editing via `sed`, viewing via `nl | sed -n`. Behavior tuning happens in YAML, never in the loop. Run scripts compose everything: `run/mini.py` merges config specs (`-c file.yaml -c agent.mode=yolo`) and does `get_model(...)`, `get_environment(...)`, `get_agent(...)`, `agent.run(task)` — class selection is string-based dynamic import (`_MODEL_CLASS_MAPPING`, `_AGENT_MAPPING`).
143 +
144 +### 3.3 Text-based fallback
145 +
146 +`models/litellm_textbased_model.py` (48 lines) is the v1/original-SWE-agent protocol: no `tools` parameter at all; actions are extracted from the assistant text with a regex (`` r"```mswea_bash_command\s*\n(.*?)\n```" ``), exactly one action per response enforced (`parse_regex_actions`, `models/utils/actions_text.py:15–40`), observations returned as `role: "user"` messages. The docstring in `actions_text.py` notes: *"As of mini-swe-agent v2.0, we strongly recommend to use toolcalls instead"* — an empirical admission that native tool-calling APIs beat markdown-block parsing, while proving the agent loop is indifferent to which protocol is used.
147 +
148 +---
149 +
150 +## 4. What mini-swe-agent deliberately OMITS — and the consequences
151 +
152 +| Omission | Detail | Consequence |
153 +|---|---|---|
154 +| **Rich tool set** | One tool: `bash`. No read/write/edit/grep/glob. Editing is `sed`/heredocs per the prompt. | Works for strong models on benchmarks; brutal for interactive use — a one-character `sed` mistake silently corrupts files, no diffs, no ambiguity detection, no atomic writes. This is the single largest gap for a daily driver. |
155 +| **Context compaction** | None. `self.messages` grows monotonically; full history sent every call. `ContextWindowExceededError` is an *abort* exception (`litellm_model.py:54`) — hitting the window kills the run. | Fine for bounded benchmark episodes (~$3 cost cap doubles as an implicit context cap). Disqualifying for long interactive sessions. |
156 +| **Session resume** | Trajectories saved every step, but write-only. No resume/branch/rewind; `inspector.py` is read-only. | Every invocation starts from scratch. Unacceptable for a daily tool. |
157 +| **Streaming** | Blocking completion calls; spinner while waiting. | Terrible perceived latency for interactive use; irrelevant for benchmarks. |
158 +| **Persistent shell / process manager** | Fresh subshell per command, 30s timeout, no background processes. Dev servers, watchers, REPLs are impossible. | Prompt-level workaround for cwd/env; no workaround exists for long-running processes. |
159 +| **Permission engine** | `confirm`/`yolo`/`human` mode + regex whitelist (`interactive.py:162–163`). No capability model, no persistence of grants, no scoping. | Adequate for a single trusted user in a sandbox; not for a product where "always allow in this project" must persist. |
160 +| **Repository intelligence** | Zero. The model runs `ls`, `grep`, `find` itself. | Elegant (no index to maintain, never stale) but wasteful: repeated discovery burns tokens and turns; nothing survives between sessions. |
161 +| **Event bus** | None. The message list *is* the event log. UI = `add_messages` override printing via Rich. | Works only because there is one linear consumer. A real TUI (status line, collapsible tool calls, diff viewer, parallel processes) needs typed events. |
162 +| **Parallel/linear history** | Strictly linear; one action stream; no subagents. | Simple to reason about and serialize; caps throughput and precludes delegation. |
163 +
164 +The trade summarized: **mini-swe-agent optimizes for benchmark performance per line of code and for research legibility** (trivially hackable, trivially reproducible, environment-swappable for SWE-bench containers). Nearly every omission that is free on a benchmark is a first-order product defect in a daily-driver terminal agent.
165 +
166 +## 5. Accidental vs. essential complexity — subsystem by subsystem
167 +
168 +For each subsystem larger agents (Claude Code, OpenCode, Hermes, OpenHands) carry, is mini-swe-agent's *absence* of it viable for KHAELOR?
169 +
170 +- **Tool registry — absence NOT viable, but the lesson holds.** mini proves the *count* of tools in big agents is largely accidental (one tool scores >74%), but bash-only is viable only because SWE-bench never shows a human the intermediate states. KHAELOR needs `read/write/edit/grep/glob` for observability (diffs, headers, permission classification), safety, and token efficiency — CLAUDE.md's ~7 primitives is the right calibration. Adopt mini's registry *shape*: a static, tiny declaration like `BASH_TOOL`, not a plugin framework.
171 +- **Permission system — absence NOT viable.** But mini shows the *evaluator* can be small: mode + whitelist is ~10 lines. KHAELOR's capability model (`file.write.project`, etc.) is essential product complexity (persistence, scoping, elegant UI); a rules-engine DSL would be accidental complexity.
172 +- **Context engine — absence NOT viable, and this is mini's clearest cliff.** Growing a flat list until the window explodes is only survivable under a $3 cap. However, mini shows the *first 80%* of context management is trivial: head/tail truncation in an observation template. KHAELOR's compaction/checkpointing is essential; what would be accidental is *retrieval-heavy context stuffing* — mini demonstrates models navigate repositories themselves very well when given a good shell.
173 +- **TUI — absence NOT viable for KHAELOR by definition (Absolute Rule #2).** mini's Rich-print interface is honest about being a research harness. But its interaction *grammar* — Ctrl-C becomes a steering message, "agent wants to finish" becomes a prompt for the next task, mode switching mid-run — is excellent and cheap, and KHAELOR should preserve exactly those semantics under a real TUI.
174 +- **Session persistence — absence (of resume) NOT viable.** But save-full-state-every-step-in-a-`finally` is the right *durability* discipline: KHAELOR's event journal should be crash-safe at every loop boundary, exactly like `default.py:120–121`.
175 +- **Event bus — absence viable only without streaming.** The moment streaming exists (KHAELOR §7 makes it non-negotiable), messages-as-the-only-log stops working. Essential for KHAELOR; the mini lesson is to keep the *kernel's* view simple (kernel appends to history; the bus is a service that observes it).
176 +- **Subagents / planners / multi-agent orchestration — absence VIABLE for V1.** mini plus a strong model plans in-context and scores >74% with no planner, no critic, no orchestration graph. Strong evidence this whole layer is accidental complexity at current model capability. Matches KHAELOR's "NOT V1" list.
177 +- **Memory / skills — absence VIABLE for V1.** Same evidence, same conclusion.
178 +- **Model abstraction — mini's is *larger* than KHAELOR needs.** Ten model classes + litellm exist because mini is a research harness for arbitrary models. Anthropic-only KHAELOR needs one `ModelClient` — but should copy three specifics: automatic prompt cache control (`cache_control.py`), cost from real API metadata with loud failure when unknown (`_calculate_cost`), and `finish_reason`-aware format-error messages.
179 +
180 +---
181 +
182 +## WHAT MINI-SWE-AGENT PROVES
183 +
184 +1. **A competitive agent loop is ~150 lines.** `DefaultAgent` — eight fields of state, `run()`/`step()`/`query()`/`execute_actions()` — scores >74% on SWE-bench Verified. Any kernel larger than a few hundred lines is carrying non-kernel work.
185 +2. **The model is the intelligence; scaffolding is plumbing.** No planner, no self-reflection, no orchestration, no retrieval — one bash tool and a good prompt. Capability lives in the LLM; scaffolding's job is faithful transport of actions and observations.
186 +3. **Three interfaces suffice to decouple everything**: `Model.query(messages)`, `Environment.execute(action)`, and the agent between them (the `Protocol`s in `__init__.py` are ~30 lines). Swapping local↔Docker↔Singularity or toolcall↔regex protocols requires zero kernel changes.
187 +4. **Exceptions-carrying-messages is a remarkably clean control-flow pattern.** Completion, limits, format errors, and user interruption are all "raise with the messages to append"; the loop stays four branches and termination is data-driven (`role == "exit"`).
188 +5. **Format errors are conversation, not crashes.** Feed the parse error back as a message with a strike counter; the model self-corrects. ~15 lines replace an entire "robust output parsing" subsystem.
189 +6. **Budgets are trivial and non-negotiable**: step, cost, and wall-clock checks at the top of `query()`, cost from real API metadata, hard failure when cost is unknowable. Ten lines buy the most important safety property an autonomous agent has.
190 +7. **Prompts and templates absorb enormous complexity.** Non-persistent subshells, output truncation, OS-specific editing advice, submission protocol — all handled in `mini.yaml` Jinja2, not code. Config-as-behavior keeps the loop frozen while behavior iterates.
191 +8. **Durability by default is cheap**: serialize full state in a `finally` every iteration.
192 +9. **What it proves negatively:** the exact omissions that keep it small — no streaming, no compaction, no resume, no rich tools, no processes — are precisely what separates a benchmark harness from a daily driver. Minimalism of the *kernel* generalizes; minimalism of the *product* does not.
193 +
194 +## WHAT KHAELOR'S KERNEL SHOULD PRESERVE FROM THIS MINIMALISM
195 +
196 +- **The four-verb loop, verbatim in spirit.** KHAELOR's `AgentKernel` should be recognizably `while active: query → parse → execute → observe`, readable in one screen. Everything in CLAUDE.md §4's conceptual loop already maps 1:1 onto `default.py`; keep it that way.
197 +- **Tiny, enumerable kernel state.** mini needs eight fields; KHAELOR's kernel should need barely more (history handle, model, tool runtime, budget counters, run status). If a field isn't consulted by the loop itself, it belongs to a service.
198 +- **Kernel talks to interfaces only**: `ModelClient`, `ToolRuntime`, `Workspace` — the TypeScript analogue of mini's three Protocols. The kernel must never know Anthropic wire formats, tool schemas, or filesystem details (mini's agent never parses tool calls — the model layer does).
199 +- **Structured interrupts as control flow.** Port the `InterruptAgentFlow` pattern: completion, budget exhaustion, cancellation, and steering injection are typed signals carrying the events to record, handled in one place in the loop — not booleans threaded through call stacks. (In TS: typed control-flow results/exceptions caught at the loop boundary.)
200 +- **Format-violation recovery as messages + strike limit.** Feed tool-call errors back to the model with `finish_reason` awareness; cap consecutive failures.
201 +- **Budget checks at the top of every query**, with real usage metadata only (Absolute Rule #4) and a global as well as per-session layer.
202 +- **Journal state at every loop boundary** (`finally`-style) so crashes never lose a session — mini's save discipline applied to KHAELOR's event log.
203 +- **Behavior in templates/config, not in the loop.** System prompt, observation rendering, error phrasing, truncation thresholds → configurable data, so the kernel is frozen while behavior iterates.
204 +- **No planner, no subagent framework, no memory system in V1.** mini is the existence proof that these are unnecessary for strong coding performance today; KHAELOR's "NOT V1" list is validated.
205 +- **Trust the model with the repository.** Grep/glob/bash as honest primitives beat premature indexing; ship repository *intelligence* as a context-engine service later, never as kernel logic.
206 +
207 +## WHERE KHAELOR MUST DIVERGE (AND WHY)
208 +
209 +1. **Streaming is the substrate, not an add-on.** mini blocks on `litellm.completion` and shows a spinner — acceptable when nobody watches. KHAELOR's terminal-native identity (Absolute Rule #2, CLAUDE.md §7) requires `stream(request): AsyncIterable<ModelEvent>` from day one; the kernel consumes an event stream and the TUI renders deltas. This is the single biggest structural divergence.
210 +2. **A typed event bus instead of "the message list is the log."** mini's single linear consumer (Rich prints in `add_messages`) cannot drive a status line, collapsible tool calls, diff viewers, cost display, and a journal simultaneously. KHAELOR: kernel emits typed events; history, TUI, and persistence are *subscribers* (services around the kernel — the mini philosophy, one level up).
211 +3. **First-class file tools with diffs.** Bash-only editing via `sed`/heredocs is unobservable, unreviewable, and unsafe outside a disposable container. KHAELOR ships `read/write/edit/grep/glob` as structured tools so every mutation yields a diff, a permission classification, and a header check. Keep the *set* mini-small (≤8 primitives, one-parameter-simple schemas like `BASH_TOOL`).
212 +4. **A real process manager.** Fresh-subshell-per-command with a 30s kill makes dev servers and watchers impossible. KHAELOR's `bash` vs `process` split (CLAUDE.md §10) is mandatory; adopt mini's process-group-kill hygiene (`local.py:_run`) inside it.
213 +5. **Context engine with compaction.** mini treats `ContextWindowExceededError` as fatal and resends full history every call. KHAELOR sessions are long-lived; budget awareness, checkpoint summaries, and cache-friendly message layout are essential. Steal mini's cheap trick (template-level head/tail truncation of tool output) as the first line of defense.
214 +6. **Persistent, resumable sessions.** Keep mini's every-step durability, add what it lacks: load, resume, replay from the event journal (`/sessions`, `/resume`).
215 +7. **Explicit completion, not a magic string.** `COMPLETE_TASK_AND_SUBMIT_FINAL_OUTPUT` sniffed from stdout (`local.py:45–56`) is spoofable by any command output and encodes completion in the prompt–environment contract. KHAELOR: completion is a structured signal validated against `CompletionEvidence` (CLAUDE.md §17) — the kernel verifies before it believes.
216 +8. **A capability permission engine with persistence and elegant UI.** mini's confirm/yolo/whitelist is the right *size* of evaluator but the wrong *model* for a product: KHAELOR needs `file.write.project`-style capabilities, remembered grants, and the inline permission panel — while preserving mini's property that a rejection becomes a steering message to the model (`_ask_confirmation_or_interrupt` → `UserRejection`).
217 +9. **Anthropic-native model layer, not a router.** Drop the ten-backend polymorphism (that's mini's research mission, not KHAELOR's); keep the three valuable behaviors buried in it: automatic prompt cache control, cost from real usage metadata with loud failure, and truncation-aware error recovery.
218 +10. **Interruption and steering as first-class concurrency.** mini's Ctrl-C-to-comment is the right UX seed, but it works only because everything is synchronous. With streaming + background processes, KHAELOR needs cancellation that propagates through model stream → tools → processes without corrupting the session (CLAUDE.md §14), plus queued steering — a genuinely new design, not an extension of mini's.
219 +
220 +**Bottom line:** mini-swe-agent proves KHAELOR's kernel can — and therefore must — stay under a few hundred lines with three narrow interfaces and exception-style control flow. Everything KHAELOR adds beyond that (streaming, events, rich tools, processes, compaction, sessions, permissions, TUI) is justified product complexity — and every piece of it must live in services *around* that kernel, or we will have learned nothing from the smallest agent that works.
added docs/research/OPENCODE_ANALYSIS.md +371 −0
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1 +<!--
2 +KHAELOR
3 +File: docs/research/OPENCODE_ANALYSIS.md
4 +Author: Simon-Pierre Boucher
5 +Contact: contact@spboucher.ai
6 +-->
7 +
8 +# OpenCode — Deep Architecture Analysis (Phase 0 Research)
9 +
10 +**Reference:** `references/opencode` — snapshot at commit `0bff28de09105088ff5bdefab91413d55c28dff1` (2026-08-09), repo `github.com/anomalyco/opencode`, version `1.18.x`.
11 +
12 +**Method:** real code-path tracing (imports, agent loop, tool registry, render tree, permission checks, persistence), not README reading. All paths are relative to the OpenCode repo root. Key symbols are cited as evidence.
13 +
14 +**Important context:** this snapshot is the *post-rewrite* OpenCode. The old Go/bubbletea TUI is gone; the entire product is now **TypeScript on Bun**, with a SolidJS-driven terminal renderer (`@opentui/*`). The codebase also visibly contains **two coexisting generations**: the live "v1" runtime (`packages/opencode/src/**`, schemas in `packages/core/src/v1/**`) and an in-progress event-sourced "v2" layer (`packages/core/src/{session,agent,permission,config,snapshot,tool}`). Both write to the same SQLite database. This mid-migration state is itself an architectural lesson (see "What OpenCode does poorly").
15 +
16 +---
17 +
18 +## 1. Monorepo and technology stack
19 +
20 +- Bun workspace monorepo (`package.json` at root, `packageManager: bun@1.3.14`, turbo for typecheck, oxlint). ~30 packages under `packages/`: the ones that matter for a terminal agent are:
21 + - `packages/opencode` — the CLI + engine (agent loop, tools, sessions, server routes).
22 + - `packages/core` — shared services: database, event system, filesystem, ripgrep, permission/agent/config schemas (v1 + v2), snapshots, shell, PTY.
23 + - `packages/tui` — the terminal UI (SolidJS + `@opentui/solid`).
24 + - `packages/sdk` — `openapi.json` + generated JS client (`packages/sdk/js/src/gen/{client.gen.ts,sdk.gen.ts,types.gen.ts}`).
25 + - `packages/schema` — Effect Schema definitions shared by everything (`session.ts` v1, `session-message.ts` v2, `permission`, `revert`, identifiers).
26 + - Plus web/app/desktop/console/enterprise packages that are irrelevant to the terminal product but bloat the repo.
27 +- Core libraries: **Effect 4** (services, layers, streams, structured concurrency) everywhere in the engine; **SolidJS 1.9** + **`@opentui/core|solid|keymap` 0.4.5** for the TUI; **`ai` SDK 6** for provider streaming; **drizzle-orm + SQLite** for persistence; **web-tree-sitter** (bash/powershell WASM grammars) for command parsing; **fuzzysort** for fuzzy matching; **ripgrep** (bundled binary service, `packages/core/src/ripgrep`).
28 +- The engine is written in "Effect service" style: every subsystem is a `Context.Service` with a `Layer` and explicit dependency list (e.g. `SessionProcessor.node = LayerNode.make({ service, layer, deps: [Session.node, Config.node, Snapshot.node, ...] })` in `packages/opencode/src/session/processor.ts:699`). This gives explicit wiring and testability at the cost of a steep idiom (generators, `Effect.gen`, `Deferred`, `PubSub` everywhere).
29 +
30 +---
31 +
32 +## 2. Client/server architecture
33 +
34 +### 2.1 Process model — one process, virtual HTTP
35 +
36 +The headline finding: **OpenCode is architected as client/server but usually runs as a single process.**
37 +
38 +- The server is an **Effect HttpApi** app (not raw hono in this generation): `packages/opencode/src/server/server.ts` builds `HttpApiApp.webHandler()` and exposes both `fetch(request)` and an **in-memory `request(input, init)`** entry (`Server.Default`, `server.ts:57-66`). `openapi()` derives the public OpenAPI document from `PublicApi`.
39 +- The default `opencode` command (`packages/opencode/src/cli/cmd/tui.ts`, `TuiThreadCommand`) does **not** open a socket. It spawns the engine in a **Bun Worker** (`packages/opencode/src/cli/tui/worker.ts`) and gives the TUI:
40 + - `createWorkerFetch(client)` — a `fetch` implementation that serializes `{url, method, headers, body}` over an RPC channel; the worker replays it against `Server.Default().app.fetch(request)` (`worker.ts:31-49`). The base URL is a placeholder (`http://opencode.internal`).
41 + - `createEventSource(client)` — subscribes to `"global.event"` RPC events instead of SSE (`cli/cmd/tui.ts:42-49`); the worker forwards every `GlobalBus` event over RPC (`worker.ts:24-26`).
42 +- The same TUI can run against a **real** HTTP server: `packages/cli/src/tui.ts` (`runTui({url, headers})`) uses plain HTTP + SSE with exponential backoff. `opencode serve` / `opencode attach` / `opencode web` (`packages/opencode/src/cli/cmd/{serve,attach,web}.ts`) expose the same API over the network; `server.ts` supports mDNS advertisement (`MDNS`) and CORS.
43 +
44 +**Consequence:** the client is written 100% against the SDK/API surface, but the common path pays no network tax and needs no daemon lifecycle management. UI ↔ engine isolation also means a render-thread stall never blocks tool execution and vice versa.
45 +
46 +### 2.2 API surface and SDK
47 +
48 +- Route groups: `packages/opencode/src/server/routes/instance/httpapi/groups/{session,permission,question,provider,config,file,event,project,workspace,pty,mcp,tui,global,...}.ts`.
49 +- The JS SDK is **generated from `packages/sdk/openapi.json` with `@hey-api/openapi-ts`** (`packages/sdk/js/script/build.ts`; ~162 paths / 188 operations into `client.gen.ts` / `sdk.gen.ts` / `types.gen.ts`), so client and server cannot drift silently. The TUI consumes it via `createOpencodeClient({baseUrl, fetch, directory, headers})` (`packages/tui/src/context/sdk.tsx`). A `packages/sdk-next` variant embeds the engine in-process for SDK consumers.
50 +- Events reach clients through SSE handlers — per-instance `/event` and server-wide `/global/event` (`server/routes/instance/httpapi/handlers/{event,global}.ts`): `text/event-stream`, listener registered into an unbounded queue *before* the stream body starts ("Listener registration is eager, so events published after this point cannot be lost"), filtered by instance directory/workspace, prefixed with `server.connected`, merged with a 10s `server.heartbeat`. Response gzip middleware explicitly bypasses SSE paths.
51 +- Multiple clients (TUI + web + IDE + ACP) can attach to one engine; the server is **multi-tenant across project directories via an `x-opencode-directory` header**, with per-directory engine state held in a `ScopedCache` keyed on `ctx.directory` (`packages/opencode/src/effect/instance-state.ts`) and instance boot deduplicated through `Deferred`s (`packages/opencode/src/project/instance-store.ts`). The share feature and control-plane routes build on the same event stream.
52 +
53 +### 2.3 Event system — the engine's spine
54 +
55 +Three layers (all evidence in `packages/opencode/src/bus/global.ts`, `packages/core/src/event.ts`, `packages/opencode/src/event-v2-bridge.ts`):
56 +
57 +1. **`GlobalBus`** — a plain in-memory `EventEmitter` for process-level fan-out to SSE/RPC clients.
58 +2. **`EventV2`** — typed pub/sub on Effect `PubSub`, with a critical property: event definitions can be **durable** (`options: {durable: {aggregate: "sessionID", version: 1}}` in `packages/schema/src/v1/session.ts`). Publishing a durable event transactionally appends it to the `event` table (per-aggregate `seq` from `event_sequence`) **and runs registered projectors in the same transaction** ("Local operational projection committed atomically with a new durable event").
59 +3. **`EventV2Bridge`** — attaches location info (directory/workspace/project) to every publish and re-emits onto `GlobalBus`, including a second `sync` envelope for durable events (replication/share).
60 +
61 +**Persistence is a projection of events.** `packages/core/src/session/projector.ts` maps `SessionV1.Event.{Created,Updated,MessageUpdated,PartUpdated,...}` onto the `session` / `message` / `part` tables; session cost and token counters are maintained *incrementally* (`sql\`${col} + ${delta}\`` applied from `step-finish` parts, with negative deltas on part replacement/removal). `packages/opencode/src/session/session.ts` `updateMessage`/`updatePart` never touch the DB directly — they only publish events. The UI, the DB, and remote clients are all consumers of the same stream. This is the single most elegant structural decision in the codebase.
62 +
63 +---
64 +
65 +## 3. TUI framework
66 +
67 +### 3.1 Stack and rendering model
68 +
69 +- **SolidJS 1.9.10 (patched) + `@opentui/core` + `@opentui/solid` + `@opentui/keymap`** — opentui is the team's own terminal UI engine: a **retained-mode renderable tree with Yoga flexbox layout painted into an optimized cell buffer at a target FPS**, driven declaratively through Solid's fine-grained reactivity. JSX intrinsics are terminal renderables: `<box>`, `<text>`, `<span>`, `<scrollbox>`, `<textarea>`, `<input>`, `<markdown>`, `<code>`, `<diff>`, `<spinner>`.
70 +- Bootstrap: `packages/tui/src/app.tsx:191-213` — `createCliRenderer({ targetFps: 60, useKittyKeyboard: {}, exitOnCtrlC: false, externalOutputMode: "passthrough", useMouse: ... })` inside an Effect `acquireRelease`; `render(() => <Providers…/>, renderer)` from `@opentui/solid`.
71 +- Rendering is dirty-driven, not full-redraw: components call `renderer.requestRender()` only for imperative fixups; normal updates flow from Solid signals into individual renderables. Custom cell-level painting is possible (`FrameBufferRenderable` subclass with `renderSelf(buffer: OptimizedBuffer)` in `packages/tui/src/component/bg-pulse.tsx`).
72 +- **No web tech, no marked, no shiki in the TUI**: markdown is a native opentui renderable (`<markdown streaming={true} internalBlockMode="top-level" …/>`), and syntax highlighting is **tree-sitter WASM grammars + nvim-treesitter highlight queries** (35+ languages declared in `packages/tui/src/parsers-config.ts`, registered via `addDefaultParsers`). Highlight styles are generated from the active theme (`generateSyntax(theme)` in `packages/tui/src/theme/index.ts`).
73 +
74 +### 3.2 Component architecture
75 +
76 +- Routing is a plain Solid store, not a router library: `packages/tui/src/context/route.tsx` (`Route = HomeRoute | SessionRoute | PluginRoute`, `navigate()` via `reconcile`). Top-level `<Switch>` in `app.tsx:1112` → `<Home/>` / `<Session/>`; the session subtree remounts keyed on session id.
77 +- ~25 nested context providers compose the app (`app.tsx:247-349`): Exit → ErrorBoundary → Keymap → SDK → Sync → Theme → Local → Dialog → Frecency → PromptHistory → …
78 +- The session view (`packages/tui/src/routes/session/index.tsx`, 2725 lines) renders messages with a plain `<For>` inside an opentui `<scrollbox stickyScroll stickyStart="bottom">`. **There is no list virtualization**; instead the sync store hard-caps at **100 messages per session** and GCs older parts (`packages/tui/src/context/sync.tsx:341-358`). Bounding the data instead of virtualizing the view is a deliberate simplification.
79 +- Tool parts dispatch through `PART_MAPPING = { text: TextPart, tool: ToolPart, reasoning: ReasoningPart }` and a `toolDisplay()` switch to per-tool components (`Shell`, `Edit`, `Read`, `Task`, …), built on two presentation primitives: `InlineTool` (one line, collapsed) and `BlockTool` (bordered block).
80 +- The sidebar (`routes/session/sidebar.tsx`, fixed width 42, auto-shown when width > 120) is composed entirely of plugin slots — even first-party UI (todos, LSP, MCP, changed files) is a "feature plugin" under `packages/tui/src/feature-plugins/`.
81 +
82 +### 3.3 State sync — server state mirrored into a Solid store
83 +
84 +`packages/tui/src/context/sync.tsx` is the heart of the client:
85 +
86 +- One `createStore` holding `session`, `message`, `part`, `permission`, `question`, `todo`, `agent`, `provider`, `config`, `lsp`, `mcp`, `vcs`, … Sessions/messages/parts are **sorted arrays maintained with binary search** (`search()` helper) so each event application is O(log n) + splice.
87 +- Streaming text arrives as **`message.part.delta` events**, appended in place with `produce()` — Solid's granular reactivity then repaints only the affected `<markdown>` node. This is the entire streaming render path; there is no diffing of whole messages.
88 +- SSE events are **coalesced in a 16 ms window and applied inside Solid's `batch()`** ("Batch all event emissions so all store updates result in a single render", `packages/tui/src/context/sdk.tsx:48-80`).
89 +- Three-phase bootstrap (`loading` → `partial` → `complete`): a small blocking fetch set (providers, agents, config, project), then everything else non-blocking. Sessions hydrate lazily (`session.sync(sessionID)` fetches info + last 100 messages + todos + diff), with an explicit race guard so a slower REST snapshot never clobbers fresher SSE-streamed text (`hydratingSessions`; regression tests `test/cli/cmd/tui/sync-live-hydration.test.tsx`).
90 +
91 +### 3.4 Keyboard system
92 +
93 +- `@opentui/keymap` wrapped by `packages/tui/src/keymap.tsx`. Bindings are declared *reactively and locally* via `useBindings(() => ({ mode, commands, bindings }))` in whatever component owns them; command metadata (`{name, title, category, slashName, slashAliases, suggested, run}`) doubles as the source for both the command palette and slash commands.
94 +- **Leader key** (`<leader>` = `ctrl+x`, 2 s timeout, `registerTimedLeader`), key aliases, and a **mode stack** (`base` / `modal` / `autocomplete`): dialogs push `"modal"` mode, which automatically suppresses all `base`-mode layers — that is how overlays capture input without manual focus bookkeeping.
95 +- ~230 rebindable actions in `packages/tui/src/config/keybind.ts` (`Definitions` with defaults + descriptions), validated by Effect Schema, configured in a **separate `tui.json`** (deliberately split from `opencode.json`). A "which-key" overlay (`feature-plugins/system/which-key.tsx`) shows pending key sequences.
96 +
97 +### 3.5 The composer (prompt)
98 +
99 +`packages/tui/src/component/prompt/index.tsx` (1716 lines) — the single most engineered component:
100 +
101 +- One `<textarea>` renderable, min height 1, max height `max(6, height/3)`, multiline via `shift+return`/`ctrl+j`, with syntax-styled text and configurable cursor.
102 +- **Extmarks** (editor-style virtual text spans) are the core mechanism: file mentions, agent mentions, and collapsed pastes are inserted as `input.extmarks.create({start, end, virtual: true, styleId})`, mapped to structured `PromptInfo.parts` via `extmarkToPartIndex`; `syncExtmarksWithPromptParts()` rederives part offsets from live extmark positions on every edit. The submitted prompt is thus **structured parts** (text + file refs + agent refs), not a flat string.
103 +- **`@` file mentions**: width-aware trigger detection (`Intl.Segmenter` + `Bun.stringWidth` so offsets match terminal cells, `packages/tui/src/prompt/display.ts`), server-side fuzzy file finding (`sdk.client.v2.fs.find`, ranked server-side and deliberately not re-sorted), line-range syntax `@file#12-40`, agent and MCP-resource completion in the same popup.
104 +- **Frecency**: JSONL at `<state>/frecency.jsonl`, score `frequency / (1 + ageDays)`, folded into autocomplete ranking (`score * (1 + frecencyScore)`).
105 +- **Slash commands** are just palette commands with a `slashName`, merged with server-defined commands, ranked by fuzzysort with an exact-prefix bonus.
106 +- **Paste intelligence**: bracketed paste decoding; ≥3 lines or >150 chars collapses to a `[Pasted ~N lines]` extmark expanded only at submit; path-looking pastes become file attachments; images/PDFs become base64 file parts.
107 +- **Shell mode**: `!` at offset 0 switches the composer into shell mode; submit routes to `session.shell` instead of the agent.
108 +- History (`<state>/prompt-history.jsonl`, 50 entries, cursor-position-aware navigation), stash (named drafts), external `$EDITOR` round-trip that re-locates extmark placeholders afterwards, IME-safe submit (double `setTimeout` flush), and an explicit double-Enter race guard with a regression test (`test/cli/tui/prompt-submit-race.test.ts`).
109 +
110 +### 3.6 Dialogs, palette, model selector
111 +
112 +- `packages/tui/src/ui/dialog.tsx`: a dialog stack rendered as an absolutely-positioned `zIndex={3000}` layer with an alpha scrim; focus is saved on open and restored only if the previous renderable is still mounted. Escape/ctrl+c dismissal is disabled while a mouse text-selection is active — a small detail that protects copy behavior.
113 +- `packages/tui/src/ui/dialog-select.tsx` (791 lines) is the generic list dialog: categories, fuzzysort filter, footer key hints, action buttons, mouse + keyboard. Every picker (model, agent, session, theme, workspace…) is a thin wrapper over it.
114 +- Command palette (`component/command-palette.tsx`, `ctrl+p`) reads reachable commands *from the keymap itself* (`keymap.getCommandEntries({namespace: "palette", visibility: "reachable"})`) and shows their live bindings — one registry powers keys, palette, and slash commands.
115 +- Model selector (`component/dialog-model.tsx`): Favorites / Recent categories, provider ordering, deprecated filtering, sub-dialogs for provider and variant.
116 +
117 +### 3.7 Terminal capabilities, theming, resize
118 +
119 +- Terminal palette is queried (`renderer.getPalette({size: 16})`) and a **"system" theme is synthesized from the actual terminal colors** (`generateSystem(colors, mode)`); dark/light is detected via `waitForThemeMode` plus a raw DEC escape sniffer for live OS theme switches. 33 bundled themes as JSON assets; custom themes from `~/.config/opencode/themes/` and `.opencode/themes/` with SIGUSR2 hot reload.
120 +- Kitty keyboard protocol enabled; mouse optional; win32 gets FFI-level console-mode fixes (`packages/tui/src/terminal-win32.ts`, `dlopen("kernel32.dll")`); `ctrl+z` suspend/resume handled properly (`renderer.suspend()` + `SIGCONT`).
121 +- Resize: everything derives from `useTerminalDimensions()` memos (`wide() = width > 120` toggles sidebar and split-vs-unified diffs). `externalOutputMode: "passthrough"` keeps stray `console.log` from corrupting frames.
122 +- Diffs render through opentui's native `<diff>` renderable (split/unified, syntax highlighting, wrap modes, full theme color set), used in the edit tool view, permission previews, and a full-screen diff viewer feature-plugin (`feature-plugins/system/diff-viewer.tsx`, 1077 lines: file tree, hunk navigation `]`/`[`, git/branch/last-turn modes).
123 +
124 +---
125 +
126 +## 4. Agent architecture
127 +
128 +### 4.1 Agents = permission policies (mostly), not prompts
129 +
130 +`packages/opencode/src/agent/agent.ts` defines `Agent.Info = {name, mode: "subagent"|"primary"|"all", permission: Ruleset, model?, prompt?, temperature?, steps?, hidden?, …}`.
131 +
132 +The decisive finding: **`build` and `plan` share the same system prompt and the same tool registry — they differ only in permission rulesets** (plus reminder injection):
133 +
134 +- `build`: defaults + `{question: "allow", plan_enter: "allow"}`.
135 +- `plan`: defaults + `{question: "allow", plan_exit: "allow", edit: {"*": "deny", ".opencode/plans/*.md": "allow"}, task: {general: "deny"}}` (`agent.ts:157-181`). Plan mode's edit-blocking is *pure permission policy*; `Permission.disabled()` also derives tool visibility from the ruleset (a tool whose last matching rule is `pattern:"*", action:"deny"` is removed from the model's tool list), so `write`/`edit`/`apply_patch` disappear in plan mode rather than erroring.
136 +- Plan behavior is reinforced by **synthetic reminder parts** appended to the last user message (`packages/opencode/src/session/reminders.ts` injecting `session/prompt/plan.txt`, `plan-mode.txt`, `build-switch.txt`) — not by a different system prompt.
137 +- Neither built-in primary agent has a `prompt` field; the system prompt is selected by **model family**: `SystemPrompt.provider(model)` in `packages/opencode/src/session/system.ts` picks `session/prompt/anthropic.txt` for Claude, `gpt.txt`/`gemini.txt`/etc. otherwise. An agent `prompt` field *replaces* this entirely (`session/llm/request.ts:60`).
138 +- Utility agents (`explore`, `compaction`, `title`, `summary`) are hidden agents with their own prompts and `"*": "deny"` + allow-lists — e.g. `explore` is a read-only search subagent (`agent/prompt/explore.txt`).
139 +- Custom agents: markdown files in `.opencode/agent{s}/**/*.md` with YAML frontmatter (`ConfigAgent.load`, schema `ConfigAgentV1.Info`) or JSON config; a permissive YAML fallback exists "because other coding agents like claude code allow invalid yaml".
140 +- Mid-session agent switching is trivial because **agent is a per-message field** (`SessionV1.User.agent`), cycled with Tab in the TUI. `plan_exit` is a tool that asks the user a question and then simply writes a new user message with `agent: "build"` (`packages/opencode/src/tool/plan.ts`).
141 +
142 +### 4.2 The agent loop — state-machine over persisted messages
143 +
144 +The loop lives in `packages/opencode/src/session/prompt.ts` (`SessionPrompt.runLoop`, lines 1081-1341), with per-turn stream handling in `packages/opencode/src/session/processor.ts` (`SessionProcessor`). Shape:
145 +
146 +```
147 +while (true) {
148 + msgs = MessageV2.filterCompactedEffect(sessionID) // re-read persisted state
149 + {lastUser, lastAssistant, tasks} = MessageV2.latest(msgs)
150 + if (assistant finished && no pending tool calls) break // exit condition derived from state
151 + task = tasks.pop()
152 + if (task is "subtask") { handleSubtask(...); continue }
153 + if (task is "compaction") { compaction.process(...); continue }
154 + if (lastFinished overflows) { compaction.create(...); continue }
155 + msg = new assistant message
156 + handle = processor.create({assistantMessage, sessionID, model})
157 + tools = SessionTools.resolve({agent, session, model, ...})
158 + system = [environment, instructions, mcp, skills]
159 + result = handle.process({system, messages, tools, model}) // one streamed LLM step
160 + if (result === "stop") break
161 + if (result === "compact") compaction.create(...)
162 +}
163 +```
164 +
165 +Key properties, all verified in source:
166 +
167 +- **The database is the loop's state.** Each iteration re-derives what to do from persisted messages/parts; compaction and subagent invocations are *persisted parts* (`compaction`, `subtask` part types) popped as tasks. A crashed process can resume mid-conversation because nothing lives only in loop-local variables. `SessionPrompt.loop` wraps `runLoop` in `state.ensureRunning(...)` so concurrent prompts join the running loop instead of double-driving it.
168 +- **`SessionProcessor` is a pure stream-event reducer** (`processor.ts:278-537`): a `handleEvent` switch over `text-start/delta/end`, `reasoning-*`, `tool-input-*`, `tool-call`, `tool-result`, `tool-error`, `step-start/finish`, `finish`. Every event immediately becomes a part upsert (`session.updatePart`) or a delta event (`session.updatePartDelta`) — persistence and UI streaming are the same operation.
169 +- **Doom-loop detection**: if the last 3 parts are the same tool with byte-identical JSON input, a `doom_loop` permission request interrupts the run (`processor.ts:353-380`, `DOOM_LOOP_THRESHOLD = 3`).
170 +- **Snapshots bracket every step**: `snapshot.track()` before the stream and at `step-start`/`step-finish`; a `patch` part with `{hash, files}` is recorded whenever files changed (`processor.ts:424-470`) — this powers revert and the diff viewer.
171 +- **Interrupts are first-class**: `Effect.onInterrupt` marks the assistant message aborted; `cleanup()` waits up to 250 ms for in-flight tool calls, then marks stragglers `status: "error", metadata.interrupted: true`; the message-to-model converter later turns pending/running tool parts into `"[Tool execution was interrupted]"` results so Anthropic never sees a dangling `tool_use` (`message-v2.ts toModelMessagesEffect`).
172 +- **Retry is a policy around the stream** (`SessionRetry.policy`, surfaced as a live `retry` status with attempt count), and provider `content-filter` finishes are converted into visible errors instead of silent idles (`prompt.ts:1301-1308`).
173 +- Usage/cost come from real provider metadata at `step-finish` (`Session.getUsage`), incrementally accumulated onto the assistant message and session row.
174 +
175 +### 4.3 Subagents
176 +
177 +`packages/opencode/src/tool/task.ts`:
178 +
179 +- `task` spawns a **child session** (`sessions.create({parentID, agent, permission})`) — fresh context by design; `task_id` lets the model resume a prior child session. The parent's model/variant is inherited unless the subagent pins its own.
180 +- **Permission derivation** (`agent/subagent-permissions.ts`): only the parent's *deny* rules and `external_directory` rules propagate to the child; the subagent's own ruleset defines its capabilities. `task` and `todowrite` are force-denied for children unless explicitly granted — combined with `subagent_depth` (default 1, checked by walking `parentID`), this prevents recursive agent explosions.
181 +- Background subagents (behind a flag): results are injected back into the parent session as synthetic `<task id=… state=…>` text parts; a `BackgroundJob` service manages wait/promotion/cancel.
182 +- Rendering: the parent's TUI shows child-session progress live because child events flow over the same bus.
183 +
184 +---
185 +
186 +## 5. State and persistence
187 +
188 +### 5.1 Storage backend
189 +
190 +- **SQLite + drizzle, WAL mode**, at `~/.local/share/opencode/opencode.db` (`packages/core/src/database/database.ts`; pragmas: WAL, `synchronous=NORMAL`, `busy_timeout=5000`, 64 MB cache). Legacy JSON-file storage (`packages/opencode/src/storage/storage.ts`) survives only for `session_diff`.
191 +- Tables (`packages/core/src/session/sql.ts` + `database/schema.gen.ts`): `session` (typed columns: project/workspace/parent ids, directory, title, cost, token counters, `revert` json, `permission` json, agent, model), `message` and `part` (**ids + timestamps as columns, payload as one JSON blob** — schema-flexible, index-poor by design), `todo`, `event`/`event_sequence` (durable event log), `permission` (persisted approvals, v2), `project`, `project_directory`, `workspace`.
192 +- IDs are monotonic ULID-like strings (`msg…`, `prt…`, hex-time prefix + counter, `packages/schema/src/identifier.ts`) so `ORDER BY id` equals insertion order — this quietly simplifies pagination, part ordering, and merge logic everywhere.
193 +- Reads use keyset pagination (`MessageV2.page()`, cursor = base64 `{id, time}`) and batched part hydration.
194 +
195 +### 5.2 Message model
196 +
197 +`packages/schema/src/v1/session.ts`: `Info = User | Assistant` (role-discriminated); `Part` is a 12-variant union: `text`, `reasoning`, `file`, `tool`, `step-start`, `step-finish`, `snapshot`, `patch`, `agent`, `subtask`, `retry`, `compaction`. Tool state is a status-discriminated union `pending → running → completed | error` with `time{start,end,compacted?}` — `time.compacted` marks a completed tool result whose output was pruned. Assistant carries `parentID` (its user message), `cost`, `tokens{input,output,reasoning,cache{read,write}}`, `finish`, `error` (a typed union of named errors: `AbortedError | APIError | AuthError | ContextOverflowError | OutputLengthError | ContentFilterError | UnknownError`).
198 +
199 +The v2 model (`packages/schema/src/session-message.ts`) flattens this to a message union (`User | Assistant | Shell | Compaction | AgentSwitched | ModelSwitched | …`) with assistant content inline — evidence the team found message+parts too granular in practice.
200 +
201 +### 5.3 Snapshots and revert — the git shadow repository
202 +
203 +`packages/opencode/src/snapshot/index.ts` is one of OpenCode's best ideas:
204 +
205 +- A **separate git dir** per project/worktree at `~/.local/share/opencode/snapshot/<projectID>/<hash(worktree)>`, operated as `git --git-dir <shadow> --work-tree <real>`. The user's repo is never touched — no commits, no index changes, invisible to `git status`.
206 +- Performance: the shadow repo's `objects/info/alternates` points at the real repo's object DB and the real index is *copied* on seed — "on huge repos like chromium … `git add --all` rebuilding the hashes can take minutes. By doing this we eliminate this at all."
207 +- `track()` = `git add --all` (candidates computed from `diff-files` + untracked, ignoring >2 MiB untracked files) + `git write-tree` → a **tree hash** stored in `step-start`/`step-finish`/`patch` parts.
208 +- `restore(hash)` = `read-tree` + `checkout-index -a -f`; `revert(patches)` = per-file `git checkout <hash> -- <file>` with existence-aware deletion.
209 +- Session revert (`packages/opencode/src/session/revert.ts`): pick a message boundary → restore files from accumulated patch parts → session marked reverted but messages intact (fully undoable via `unrevert`) → only when the user prompts *past* the revert are trailing messages destructively removed.
210 +
211 +### 5.4 Configuration
212 +
213 +- `opencode.json[c]` global (`~/.config/opencode/`) + project (walk-up from cwd to worktree, nearest wins), plus `.opencode/` dirs, env (`OPENCODE_CONFIG`, `OPENCODE_CONFIG_CONTENT`, `OPENCODE_PERMISSION`), remote/org/MDM layers — ten merge stages in `packages/opencode/src/config/config.ts` (deep-merge via remeda, arrays for `instructions` set-unioned).
214 +- `{env:VAR}` and `{file:path}` substitution in any config value (`config/variable.ts`). Everything validated by Effect Schema (not zod). Writes preserve JSONC formatting via `jsonc-parser` edits; `$schema` auto-injected.
215 +- TUI concerns (keybinds, theme) are deliberately **quarantined in `tui.json`** — engine config stays client-agnostic.
216 +- Instructions files: `AGENTS.md` (plus `CLAUDE.md` compatibility unless disabled) — global first-hit, then **first match walking up** from cwd to worktree ("The first project-level match wins so we don't stack AGENTS.md/CLAUDE.md from every ancestor"), plus `config.instructions` globs/URLs (`packages/opencode/src/session/instruction.ts`). Two clever behaviors: (1) **lazy injection** — reading a file under a directory with its own AGENTS.md appends that file's instructions to the tool output as a `<system-reminder>`, deduped per assistant message; (2) the v2 `SystemContext` layer diffs instruction changes mid-session and issues explicit "these instructions replace…" deltas.
217 +
218 +---
219 +
220 +## 6. Tools
221 +
222 +### 6.1 Design philosophy: few tools, tiny schemas, rich outputs
223 +
224 +The core registry (`packages/opencode/src/tool/registry.ts`) wires: `bash(shell)`, `read`, `write`, `edit`, `apply_patch`, `grep`, `glob`, `task`, `todowrite`, `question`, `skill`, `webfetch`, `websearch`, `lsp`, `plan_exit` (+ MCP/plugin tools). Schemas are deliberately minimal — evidence:
225 +
226 +- `edit`: **4 parameters** (`filePath`, `oldString`, `newString`, `replaceAll?`) — `tool/edit.ts:47-56`.
227 +- `read`: 3 (`filePath`, `offset?`, `limit?`); `grep`: 3 (`pattern`, `path?`, `include?`); `glob`: 2; `write`: 2; `bash`: 3 (`command`, `timeout?`, `workdir?` — "Use this instead of 'cd' commands", `tool/shell/prompt.ts`).
228 +- Long guidance lives in the **description text files** (`edit.txt`, `read.txt`, `shell.txt`, …), not in parameter complexity. Descriptions can even vary by shell (PowerShell vs bash chaining notes are templated into `shell.txt`).
229 +- `Tool.define` (`tool/tool.ts`) wraps every tool with: schema decode → typed `InvalidArgumentsError` whose message is model-facing repair prose ("Please rewrite the input so it satisfies the expected schema"), automatic **output truncation with file spill** (`Truncate.output` — oversized output goes to `~/.local/share/opencode/tool-output/` and the model is told to Read/Grep it), and tracing spans.
230 +- Tool context (`Tool.Context`) exposes `ask()` (permission), `metadata()` (streamed progress metadata for the UI), `abort` signal, and the session messages — tools are UI-aware without owning rendering.
231 +
232 +### 6.2 The edit tool — nine-stage replacer cascade
233 +
234 +`packages/opencode/src/tool/edit.ts` (approaches credited in-file to Cline and gemini-cli). `replace()` (line 682) runs a generator-based `Replacer` cascade, first match wins:
235 +
236 +1. `SimpleReplacer` — exact string.
237 +2. `LineTrimmedReplacer` — line-by-line comparison with trimmed whitespace.
238 +3. `BlockAnchorReplacer` — first/last lines as anchors (≥3 lines), middle lines matched by Levenshtein similarity ≥ 0.65, block-size tolerance ±25%, best-of-multiple-candidates.
239 +4. `WhitespaceNormalizedReplacer` — all whitespace collapsed.
240 +5. `IndentationFlexibleReplacer` — common leading indentation removed.
241 +6. `EscapeNormalizedReplacer` — unescapes `\n`, `\t`, `\"`… (LLMs over-escape).
242 +7. `TrimmedBoundaryReplacer` — trimmed-boundary match.
243 +8. `ContextAwareReplacer` — anchor lines + ≥50% middle-line match.
244 +9. `MultiOccurrenceReplacer` — all exact occurrences (for `replaceAll`).
245 +
246 +Guards: uniqueness required unless `replaceAll` (`index !== lastIndex → continue`); `isDisproportionateMatch()` refuses fuzzy matches much larger than `oldString` ("Re-read the file and provide the full exact oldString"); distinct error messages for *not found* vs *ambiguous*. Around the replacement: CRLF detection and preservation (`detectLineEnding`/`convertToLineEnding`), BOM preservation (`Bom.split/join/syncFile`), per-file semaphore locks, atomic-ish write + auto-format hook (`Format.Service`), a unified diff computed and attached to both permission request metadata and tool metadata, and **LSP diagnostics appended to the tool output** ("LSP errors detected in this file, please fix: …") — the model gets type errors in the same turn as the edit.
247 +
248 +### 6.3 read / grep / glob / write / bash
249 +
250 +- `read` (`tool/read.ts`): 2000-line default, 50 KB byte cap, per-line 2000-char truncation, streaming line reader that stops at the cap; binary sniffing (extension list + non-printable ratio on a 4 KB sample); images/PDFs returned as real attachments; directories readable by the same tool (entry listing); **"Did you mean" suggestions on miss** (`miss()` lists up to 3 near-name files); output wrapped in `<path>/<type>/<content>` tags with `(Showing lines X–Y of Z. Use offset=N to continue.)` continuation hints; background LSP warm-up on read.
251 +- `grep`/`glob` (`tool/grep.ts`, `tool/glob.ts`): thin wrappers over a bundled **ripgrep** service, hard limit 100 results, structured concise output with explicit truncation notices ("Consider using a more specific path or pattern") — never dumps thousands of lines into context.
252 +- `write` (`tool/write.ts`): full-file write; diff computed against existing content for the permission request; BOM/format preservation; LSP diagnostics for the file *and* up to 5 other affected files.
253 +- `bash` (`tool/shell.ts`, 645 lines): commands are **parsed with tree-sitter** (bash + PowerShell WASM grammars) before execution — for permission patterns (below) and for detecting filesystem-verb arguments escaping the workspace (`external_directory` checks). Cross-shell support is real (bash/zsh/PowerShell 5/7/cmd with per-shell prompt guidance). Output beyond line/byte limits spills to a file with instructions to Read/Grep it.
254 +
255 +### 6.4 What KHAELOR's spec calls `process`
256 +
257 +OpenCode does not expose a first-class `process.start/list/read/write/stop` tool to the model. It has: a PTY subsystem (`packages/core/src/pty`, server routes `groups/pty.ts`) used by clients (desktop/web terminals), background jobs for subagents (`packages/opencode/src/background/job.ts`), and shell-mode/`!` for user-run commands. Long-running dev servers under *model* control are a gap — KHAELOR's planned `process` tool goes beyond OpenCode here.
258 +
259 +---
260 +
261 +## 7. Context management
262 +
263 +- **Budget:** `usable()` = model input limit minus a reserved compaction buffer (`COMPACTION_BUFFER = 20_000` or configured `compaction.reserved`), `isOverflow()` compares real usage (input+output+cache tokens from provider metadata) against it (`packages/opencode/src/session/overflow.ts`).
264 +- **Compaction is part of the loop, not a side process:** when a step finishes in overflow, the processor sets `needsCompaction`, the stream is cut (`Stream.takeUntil`), and the loop persists a `compaction` task part; the next iteration runs `compaction.process()` — a hidden `compaction` agent generates a summary assistant message (`summary: true`) with its own prompt (`agent/prompt/compaction.txt`); subsequent context building reads `filterCompactedEffect` (messages after the last summary + the summary itself). A configurable recent tail is preserved verbatim (25% of usable, clamped 2k–8k tokens, `MIN/MAX_PRESERVE_RECENT_TOKENS` in `session/compaction.ts`).
265 +- **Pruning is a second, cheaper mechanism:** `compaction.prune()` walks backwards protecting the newest `PRUNE_PROTECT = 40_000` tokens of tool outputs, then blanks older tool outputs (marking `time.compacted`, rendered to the model as `"[Old tool result content cleared]"`) if at least `PRUNE_MINIMUM = 20_000` tokens are reclaimable; `skill` outputs are never pruned. Old tool noise disappears without paying an LLM summarization pass.
266 +- **System prompt assembly** per step (`prompt.ts:1257-1269`): environment info, instruction files, MCP instructions, skills — all as separate system blocks; the model-family prompt from `SystemPrompt.provider()`.
267 +- **Prompt caching:** `packages/opencode/src/provider/transform.ts` applies `cacheControl: {type: "ephemeral"}` breakpoints for Anthropic-family models (`transform.ts:362-380`) — cache hits/writes then show up in the real token accounting.
268 +
269 +---
270 +
271 +## 8. Permission system and UX
272 +
273 +### 8.1 Model
274 +
275 +- Rules are `{permission, pattern, action}` triples; **evaluation = last matching rule wins** with wildcard matching on both fields; unmatched default is `ask` (`packages/opencode/src/permission/index.ts`: `evaluate()` is a 4-line `findLast`). `merge()` is array concatenation — later rulesets override by position. Config key order is preserved (`propertyOrder: "original"`) so users control precedence by ordering.
276 +- Permission keys are *capability-ish tool families*: `read, edit, bash, task, external_directory, webfetch, websearch, question, doom_loop, skill, todowrite, glob, grep, lsp` — note `write`/`apply_patch` map onto **`edit`**, and MCP resource tools onto `read`, so policy is written against capabilities rather than tool names.
277 +- Sensible defaults (`Agent.fromConfig` defaults in `agent/agent.ts:119-136`): `"*": "allow"` but `read: {"*.env": "ask", "*.env.example": "allow"}`, `external_directory: {"*": "ask"}`, `doom_loop: "ask"`, `question: "deny"` (enabled per-agent).
278 +
279 +### 8.2 Bash gets special treatment — tree-sitter + arity
280 +
281 +`tool/shell.ts` parses the command AST and issues a permission request whose `patterns` are the **exact command texts** and whose `always` suggestions come from `BashArity.prefix()` (`permission/arity.ts`) — a generated dictionary of how many tokens constitute a meaningful command prefix (`git: 2`, `git config: 3`, `npm run: 3`, `docker compose: 3`…). So running `git push origin main` offers "always allow `git push *`" — precise, human-meaningful generalization instead of all-or-nothing. Filesystem verbs (`rm/cp/mv/…` + PowerShell/cmd equivalents) additionally trigger `external_directory` checks when arguments resolve outside the workspace.
282 +
283 +### 8.3 Flow and UX
284 +
285 +- Tools call `ctx.ask({permission, patterns, always, metadata})`; the service evaluates against `merge(agent.permission, session.permission)`; `deny` throws immediately (typed `DeniedError`), `allow` passes, `ask` parks a `Deferred` and publishes `permission.asked` over the bus (`permission/index.ts:67-107`).
286 +- The TUI renders an inline panel in the session view (`packages/tui/src/routes/session/permission.tsx`), with **metadata-driven bodies** — an edit permission shows the actual diff (via `<diff>`), bash shows the command, `doom_loop` gets special copy. Replies: once / always / reject; rejecting in a subagent context opens a feedback textarea whose text is delivered to the model as a typed `CorrectedError` ("the user said no, and here is why") — rejection becomes steering, not a dead end.
287 +- `always` approvals are **session-scoped in-memory** in v1 (per docs: "for the rest of the current OpenCode session"); durable per-project persistence exists only in the v2 `permission` table (`packages/core/src/permission/saved.ts`). Granting `always` auto-resolves other pending requests that now evaluate to allow; rejecting one rejects all pending requests in the session.
288 +- Deny rules also *shape the tool list* (`Permission.disabled`), and non-interactive `opencode run` injects denies for `question`/`plan_enter`/`plan_exit`.
289 +
290 +---
291 +
292 +## 9. Performance engineering
293 +
294 +What makes OpenCode feel fast even when inference is slow — all verified:
295 +
296 +1. **Delta-only streaming end to end**: provider delta → `updatePartDelta` event → SSE/RPC → `produce()` append in the Solid store → single `<markdown>` node repaint. No message re-render, no layout thrash.
297 +2. **16 ms event coalescing + `batch()`** at the client boundary (`context/sdk.tsx`) — one render per frame regardless of event rate.
298 +3. **Sorted arrays + binary search** for store updates; `reconcile`/`produce` keep Solid subscriptions stable.
299 +4. **Bounded session data** (100-message cap with part GC) instead of virtualization complexity.
300 +5. **In-process worker RPC** instead of sockets for the default path; UI and engine on separate threads.
301 +6. **SQLite/WAL with incremental counters** — cost/token totals maintained by delta at part-write time, never recomputed by scanning.
302 +7. **Shadow-git snapshots with object alternates + copied index** — checkpointing is near-free even on huge repos.
303 +8. **ripgrep for all search**, hard result limits everywhere, tool-output spill-to-file with model-side pagination.
304 +9. **Prompt-cache breakpoints** for Anthropic (ephemeral cacheControl) plus a **session-scoped `promptCacheKey`** (`provider/transform.ts`) — real latency/cost reduction on every step. The models.dev catalog is disk-cached with a cross-process flock and **inlined into the compiled binary at build time** (`OPENCODE_MODELS_DEV` define) so startup never blocks on the network.
305 +10. TUI micro-craft: theme `SyntaxStyle` destruction deferred to `renderer.idle()`; palette prewarm before first paint to avoid theme flash; startup loader appears only after 500 ms (then holds ≥3 s to avoid flicker); FPS dropped 60→30 while a decorative animation is mounted; autocomplete returns the previous options while loading to avoid list flicker; spinner degrades to a static glyph when animations are disabled.
306 +11. **Startup discipline**: the CLI ships as a `bun build --compile` binary (`OPENCODE_WORKER_PATH` compiled in, bunfig/dotenv autoload disabled), with a **codified lazy-import rule** (root `AGENTS.md:64`) and `lazy()` memo helpers (`packages/opencode/src/util/lazy.ts`) keeping heavy modules (provider SDK packages — 23 bundled as lazy thunks, others `npm install`ed at runtime with `ignoreScripts: true` — tree-sitter, LSP) off the cold-start path. The TUI itself uses no dynamic `import()`; "lazy" there means lazy *data* (per-session hydration, `createResource`), not lazy modules.
307 +
308 +Known warts, admitted in-source: several `setTimeout(0) + markDirty() + requestRender()` sequences in the composer labeled "workaround… needs to be addressed properly" (`component/prompt/index.tsx:241-247, 1217-1221`).
309 +
310 +---
311 +
312 +## 10. Testing and quality signals
313 +
314 +- Regression tests exist precisely where races live: `test/cli/tui/prompt-submit-race.test.ts` (double-Enter phantom prompt), `test/cli/cmd/tui/sync-live-hydration.test.tsx` (SSE vs REST hydration race), `test/permission/arity.test.ts`, `test/agent/plan-mode-subagent-bypass.test.ts` (plan-mode subagents can still edit).
315 +- Comments frequently encode *why*: dropped orphan reasoning deltas, ConPTY paste normalization, IME flush timing, Windows console modes via FFI. The codebase reads like several years of accumulated terminal-reality scar tissue — this is exactly the knowledge KHAELOR should mine.
316 +
317 +---
318 +
319 +## WHAT OPENCODE DOES VERY WELL
320 +
321 +1. **Event-sourced session state.** Durable typed events + atomic projectors (`packages/core/src/event.ts`, `session/projector.ts`) make the DB, the TUI, remote clients, and share/replay all consumers of one stream. Persistence and streaming are literally the same write.
322 +2. **A loop that derives its next action from persisted state.** `SessionPrompt.runLoop` re-reads messages each iteration; compaction and subtasks are persisted parts, exits are derived from message state — crash-safe, resumable, and steerable by construction.
323 +3. **Permissions as data, evaluated in four lines.** `findLast(wildcard-match)` over rule arrays, capability-style keys (`write` folds into `edit`), tool visibility derived from the same rules, and *agents/modes as permission policies* rather than parallel agent implementations.
324 +4. **The bash permission bridge.** Tree-sitter parsing + the arity dictionary turn "always allow" into precise, human-meaningful patterns (`git push *`), and catch filesystem escapes (`external_directory`) before execution.
325 +5. **The edit replacer cascade** — nine matching strategies with uniqueness and disproportionate-match guards, CRLF/BOM preservation, diff in the permission prompt, and LSP diagnostics fed back in the tool result. Model-facing error messages are written as repair instructions.
326 +6. **Shadow-git snapshots.** Zero-pollution checkpointing of the working tree (alternates + copied index for O(1) seeding on huge repos), powering per-step patch parts, revert/unrevert, and the diff viewer.
327 +7. **Streaming render economics.** Delta events → Solid fine-grained updates → single-node repaints, with 16 ms coalescing and `batch()`. The TUI stays at 60 fps during full-speed token streams.
328 +8. **Composer engineering.** Extmark-backed structured prompt parts (mentions, collapsed pastes), frecency-ranked server-side file search, cursor-aware history, stash, external-editor round-trip, IME and paste correctness. This is the best terminal input widget in any agent surveyed.
329 +9. **One command registry** feeding keybindings, command palette, and slash commands, with a mode stack that makes dialog input capture automatic.
330 +10. **Tool schema minimalism with rich prose.** 2–4 parameters per tool; guidance in description text; oversized output spilled to files the model can Read/Grep; explicit truncation/continuation hints in every output.
331 +11. **Terminal-reality hardening**: kitty keyboard, terminal-palette-derived "system" theme, live dark/light detection, win32 FFI console fixes, suspend/resume, selection-safe dialogs, copy-on-select.
332 +
333 +## WHAT OPENCODE DOES POORLY
334 +
335 +1. **Two coexisting architectures.** v1 and v2 session/permission/agent/config systems live side by side (`packages/core/src/v1/**` vs `packages/core/src/{session,permission,...}`), with bridges (`EventV2Bridge`, `event-v2-bridge.ts`) and duplicated schemas. Every subsystem must be read twice to know what is live. A migration is understandable; shipping both indefinitely is architectural debt.
336 +2. **Sheer scale and surface area.** ~30 packages, web/desktop/console/enterprise/slack/stats alongside the CLI; the session route component is 2725 lines; config merging has ten layers including remote org configs and MDM. The essential terminal agent is maybe 20% of the repo.
337 +3. **Effect as a hard prerequisite.** Effect 4 (beta) generators, layers, `Deferred`, `PubSub` pervade everything. It buys real structured concurrency, but the abstraction tax is high and it pins the project to a fast-moving beta dependency (plus a patched solid-js, patched effect, 15+ patched deps in root `package.json`).
338 +4. **"Always allow" is not durable in the live path** — v1 approvals are in-memory per session; durable persistence exists only in the not-yet-primary v2 tables. Users re-approve across restarts.
339 +5. **No model-facing process manager.** PTY/background-job infrastructure exists, but the model cannot start/inspect/stop long-running processes as a first-class tool — dev-server workflows degrade to blocking bash or user-side shell mode.
340 +6. **Message+parts granularity backfired.** The v2 schema flattening (message unions with inline content) is implicit admission that the v1 part explosion (12 part types, part-level events, part GC in the client) cost more than it returned.
341 +7. **Provider-generality tax everywhere.** Model-family prompt switching (`anthropic.txt`, `gpt.txt`, `beast.txt`…), per-provider transforms, patched AI-SDK forks — necessary for their business, but it spreads conditional complexity through the model layer.
342 +8. **Some UI state is fragile by admission** — setTimeout-based layout workarounds in the composer, a 50 ms polling interval to anchor the autocomplete popup, dead prompt files (`plan-reminder-anthropic.txt` unreferenced).
343 +9. **No virtualized history**: the 100-message cap is pragmatic but means long sessions silently drop scrollback from the UI (data remains in SQLite, but the user can't scroll to it).
344 +
345 +## WHAT KHAELOR SHOULD ADOPT
346 +
347 +1. **The event-sourced spine, simplified.** Typed events as the single source of truth; persistence as an atomic projection of durable events; UI and session store fed from the same stream. This directly implements KHAELOR's §7 typed event bus and makes replay/resume free. Use SQLite/WAL with incremental usage counters and ULID-style monotonic IDs.
348 +2. **State-derived agent loop.** Kernel iterations re-derive the next action from persisted session state; compaction and steering are enqueued as persisted items, not in-memory control flow. Keep the stream reducer (`SessionProcessor` equivalent) separate from the loop (`runLoop` equivalent) — that *is* the small kernel.
349 +3. **The edit replacer cascade wholesale** (it is MIT, sourced from Cline/gemini-cli lineage): all nine strategies, the uniqueness and disproportionate-match guards, CRLF/BOM handling, and model-facing repair-prose errors. Add LSP-style diagnostics feedback later.
350 +4. **Tool design discipline**: ≤4 parameters, guidance in descriptions, output caps with spill-to-file + Read/Grep continuation, `<path>/<content>` structured outputs, "did you mean" on file miss, `workdir` parameter instead of `cd`.
351 +5. **Bash permission parsing**: tree-sitter command extraction + an arity table for "always allow `git push *`" suggestions, and external-directory detection on filesystem verbs. This is the difference between a permission system users tolerate and one they like.
352 +6. **Modes as permission policies + reminder injection**, not separate agents: KHAELOR's capability policies (§13) can express plan/build exactly as OpenCode does, including deriving tool visibility from deny rules. Agent-as-message-field makes mid-session switching trivial.
353 +7. **Shadow-git snapshots** for baseline protection (§16: "record baseline state before edits") and per-step diffs — including the alternates + copied-index seeding trick.
354 +8. **Composer techniques**: extmark-style structured prompt parts, collapsed paste placeholders expanded at submit, frecency-ranked file mentions, cursor-position-aware history, stash. Also the single command registry powering keys + palette + slash commands, and the keymap mode stack for dialogs.
355 +9. **Client performance recipe**: delta-only part updates, ~16 ms event coalescing into batched store updates, previous-result retention during async filtering, palette prewarm before first paint, deferred destruction of styling resources.
356 +10. **Interruption semantics**: abort marks the assistant message; bounded grace for in-flight tools; interrupted tool calls converted to synthetic error results so the Anthropic conversation never contains dangling `tool_use` blocks; rejection-with-feedback (`CorrectedError`) turning permission denials into steering.
357 +11. **Doom-loop detection** (3 identical consecutive tool calls → ask the user) — cheap, effective, honest.
358 +12. **In-process "server"**: even Anthropic-only and single-client, keeping the kernel behind an internal typed API/event boundary (as OpenCode does with worker RPC) preserves KHAELOR's clean layering without daemon complexity.
359 +
360 +## WHAT KHAELOR SHOULD NOT COPY
361 +
362 +1. **The dual v1/v2 architecture.** Design the event/message schema once, version it from day one (`{durable, version}` on event definitions is worth copying), and never ship two parallel session systems.
363 +2. **The Effect framework dependency.** KHAELOR needs structured concurrency, cancellation, and typed services — achievable with plain TypeScript (AbortController trees, small service containers, async iterators) without pinning the whole codebase to a beta ecosystem and a fleet of patched packages. Adopt the *patterns* (layered services, explicit deps, deferred completion), not the framework.
364 +3. **Multi-provider scaffolding**: model-family prompt files, provider transform matrices, AI-SDK indirection. KHAELOR V1 is Anthropic-only behind a single `ModelClient` — one prompt, one streaming protocol, native prompt-caching and thinking support.
365 +4. **The monorepo sprawl** (web/desktop/console/enterprise/plugins/slots). KHAELOR is one CLI. Even OpenCode's TUI plugin-slot system, elegant as it is, is premature for V1.
366 +5. **12-part message granularity with part-level GC.** Follow the direction of OpenCode's own v2 correction: fewer, flatter message shapes; keep tool state as one status-discriminated object.
367 +6. **The 100-message UI cap as the only scrollback strategy** — KHAELOR should either virtualize or page older history into view on demand rather than silently truncating.
368 +7. **In-memory-only "always allow"** — persist scoped approvals (project-scoped, pattern-based) from V1, as OpenCode's v2 tables belatedly do.
369 +8. **Ten-layer config merging** (remote org configs, MDM, well-known endpoints). KHAELOR's hierarchy is four layers (CLI → project → user → env → defaults); keep it that way.
370 +9. **setTimeout-based layout patching and polling anchors** in the composer — budget real fixes for editor/layout interaction rather than accreting workarounds.
371 +10. **Skipping a model-facing process manager.** OpenCode's biggest tool-level gap is KHAELOR's planned differentiator (`process.start/list/read/write/stop`) — do not inherit the omission.
added docs/research/OPENHANDS_ANALYSIS.md +336 −0
@@ -0,0 +1,336 @@
1 +<!--
2 +KHAELOR
3 +File: docs/research/OPENHANDS_ANALYSIS.md
4 +Author: Simon-Pierre Boucher
5 +Contact: contact@spboucher.ai
6 +-->
7 +
8 +# OpenHands Analysis — OpenHands + Software Agent SDK
9 +
10 +> Phase 0 research document for KHAELOR.
11 +> Repositories analyzed:
12 +> - `references/openhands` — the OpenHands main repository (now **Agent Canvas**, a TypeScript UI)
13 +> - `references/openhands-agent-sdk` — the **Software Agent SDK** (Python), where the entire agent architecture now lives
14 +>
15 +> All file paths below are relative to each repo root and prefixed `openhands/` or `agent-sdk/` to disambiguate. This analysis is based on tracing actual implementation files, not READMEs.
16 +
17 +---
18 +
19 +## 0. The Most Important Finding: OpenHands Already Did the Split KHAELOR Wants
20 +
21 +The single most significant architectural fact: **OpenHands rebuilt itself around a clean SDK core, and the "OpenHands" repo is now just a client.**
22 +
23 +- `openhands/package.json` declares the main repo as `@openhands/agent-canvas` — a React 19 / React Router 7 / Electron web UI with `@xterm/xterm`, `monaco-editor`, and `@openhands/typescript-client` as dependencies. `openhands/src/` contains `components`, `routes`, `stores`, `hooks`, `i18n` — a frontend, not an agent.
24 +- All intelligence, lifecycle, tools, workspace, events, and security live in `agent-sdk/`, split into four packages:
25 +
26 +| Package | Contents | Evidence |
27 +|---|---|---|
28 +| `openhands-sdk` | Agent, Conversation, Events, LLM, Context/Condenser, Security, Workspace interfaces | `agent-sdk/openhands-sdk/openhands/sdk/` |
29 +| `openhands-tools` | Terminal, FileEditor, grep, glob, browser, task tracker, delegate… | `agent-sdk/openhands-tools/openhands/tools/` |
30 +| `openhands-workspace` | Docker/remote workspace implementations | `agent-sdk/openhands-workspace/openhands/workspace/` |
31 +| `openhands-agent-server` | FastAPI server exposing conversations over REST/WebSocket | `agent-sdk/openhands-agent-server/openhands/agent_server/` |
32 +
33 +The mapping to the separation of concerns KHAELOR's CLAUDE.md prescribes is nearly one-to-one:
34 +
35 +| Concern | OpenHands SDK concept | Key files |
36 +|---|---|---|
37 +| Intelligence | `AgentBase` / `Agent` | `agent-sdk/openhands-sdk/openhands/sdk/agent/base.py`, `agent/agent.py` |
38 +| Lifecycle | `LocalConversation` + `ConversationState` | `sdk/conversation/impl/local_conversation.py`, `sdk/conversation/state.py` |
39 +| Environment | `BaseWorkspace` / `LocalWorkspace` / `RemoteWorkspace` | `sdk/workspace/base.py`, `sdk/workspace/local.py`, `sdk/workspace/remote/base.py` |
40 +| Actions | `ToolDefinition[Action, Observation]` | `sdk/tool/tool.py`, `sdk/tool/schema.py`, `sdk/tool/registry.py` |
41 +| History | `Event` + `EventLog` | `sdk/event/base.py`, `sdk/conversation/event_store.py` |
42 +| Safety | `SecurityAnalyzerBase` + `ConfirmationPolicyBase` + `SecurityRisk` | `sdk/security/analyzer.py`, `sdk/security/confirmation_policy.py`, `sdk/security/risk.py` |
43 +
44 +A second critical observation: **there is no first-class terminal UI anywhere.** The SDK renders events via Rich `visualize` properties for debugging (`sdk/conversation/visualizer/`), and the product UI is a web app with an embedded xterm widget. The terminal-native niche KHAELOR targets is genuinely unoccupied by OpenHands.
45 +
46 +---
47 +
48 +## 1. The Agent Abstraction
49 +
50 +### 1.1 Agents are stateless, frozen configuration
51 +
52 +`AgentBase` (`agent-sdk/openhands-sdk/openhands/sdk/agent/base.py`) is a **frozen Pydantic model** (`model_config = ConfigDict(frozen=True)`): "Agents are stateless and should be fully defined by their configuration." Fields are `llm`, `tools` (a list of tool *specs*, not instances), `mcp_config`, `agent_context`, `condenser`, `critic`, `system_prompt`/`system_prompt_filename`, `security_policy_filename`, `tool_concurrency_limit`. All mutable runtime state lives in `ConversationState`. Materialized tools are private runtime attrs (`_tools: dict[str, ToolDefinition]`), resolved in `_initialize()` via a `ThreadPoolExecutor` and `resolve_tool(tool_spec, state)`.
53 +
54 +This is a strong design: the agent object can be serialized into the conversation state, persisted, and compared on resume.
55 +
56 +**Resume verification** — `AgentBase.verify(persisted)` (base.py:670) enforces exactly two compatibility rules when resuming a conversation: the agent class must match, and **tools may only be added, never removed** ("Removing tools breaks backward compatibility because the LLM may have already been told about them. Adding new tools is safe"). LLM, condenser, and context can change freely between sessions. This is a precise, well-reasoned resume contract.
57 +
58 +### 1.2 The step function — the real agent loop body
59 +
60 +`Agent.step()` (`agent/agent.py:637`) is one LLM-round of the loop. Its actual sequence:
61 +
62 +1. **Pending confirmations first**: `ConversationState.get_unmatched_actions(state.active_branch())` — if action events exist without matching observations, the user has implicitly confirmed them (by calling `run()` again), so execute them and return.
63 +2. **Hook-blocked message check** (`state.pop_blocked_message`).
64 +3. **Message preparation**: `prepare_llm_messages(state.view, condenser=self.condenser, llm=self.llm)` — the condenser may return a `Condensation` *instead of* messages, in which case the step just emits the condensation event and returns (the next step sees the condensed view).
65 +4. **LLM call**: `make_llm_completion(...)` with the full tool list.
66 +5. **Typed error handling around the LLM call** (this is one of the most instructive parts):
67 + - `FunctionCallValidationError` → emit a user-role `MessageEvent` containing the error text so the *model* corrects itself; the loop continues.
68 + - `LLMContentPolicyViolationError` → nudge message, continue.
69 + - `LLMMalformedConversationHistoryError` → `state.rebuild_view()` + emit `CondensationRequest` (condensation as *recovery*), else re-raise.
70 + - `LLMContextWindowExceedError` → emit `CondensationRequest` if a condenser can handle it; else a very detailed operator-facing warning (`_log_context_window_exceeded_warning`) and re-raise.
71 +6. **Response classification**: `classify_response(message)` → `TOOL_CALLS | CONTENT | REASONING_ONLY | EMPTY` (`agent/response_dispatch.py`), each dispatched to a distinct handler.
72 +
73 +### 1.3 From LLM response to actions
74 +
75 +`Agent._get_action_event()` (agent.py:1189) converts each tool call into an `ActionEvent`:
76 +
77 +- Parses/normalizes arguments (`parse_tool_call_arguments`, `normalize_tool_call`, `fix_malformed_tool_arguments` in `agent/utils.py` — tolerant of aliasing and common LLM malformations).
78 +- Unknown tool or validation failure → `_emit_tool_error()`, which emits the `ActionEvent` *and* an `AgentErrorEvent` whose text goes back to the model ("Error validating tool 'X': ... Parameters provided: [keys]" — parameter *names only, not values*, keeping errors concise).
79 +- Pops two **injected schema fields** from the arguments: `security_risk` (the model's self-assessed risk) and `summary` (a one-line human-readable description of the action). Both are always added to every tool schema at completion time — `make_llm_completion()` (`agent/utils.py:640`) passes `add_security_risk_prediction=True` unconditionally, and the docstring notes: "Summary field is always added to tool schemas for transparency and explainability of agent actions."
80 +- Instantiates the typed action: `tool.action_from_arguments(arguments)` (Pydantic validation).
81 +
82 +Execution goes through `_ActionBatch` (agent.py:185) — a frozen dataclass owning the batch lifecycle: `_truncate_at_finish` (discard tool calls after `FinishTool`), partition hook-blocked actions, execute the rest via `ParallelToolExecutor` (default `tool_concurrency_limit=1`, i.e. sequential), then `emit()` results in original order and `finalize()` (set `ConversationExecutionStatus.FINISHED` if `FinishTool` ran).
83 +
84 +Tool executor exceptions of type `ValueError` are converted to `AgentErrorEvent` — again fed back to the model rather than surfaced to the user (`_execute_action_event`, agent.py:1334). **The agent consumes its own recoverable errors** — exactly the philosophy KHAELOR §17 demands.
85 +
86 +### 1.4 Completion signal
87 +
88 +Completion is an explicit **`FinishTool` tool call** (`sdk/tool/builtins/`), not inferred from a text response. A `ThinkTool` also exists for structured scratchpad thoughts. A single `FinishAction`/`ThinkAction` is exempt from confirmation (agent.py:1027). A `CriticMixin` can optionally evaluate finish actions and inject a follow-up user message instead of finishing (iterative refinement).
89 +
90 +### 1.5 System prompt: static + dynamic split (prompt caching)
91 +
92 +`AgentBase.static_system_message` vs `AgentBase.dynamic_context` (base.py:334, 498): the system message is assembled as **two content blocks** — a static, cacheable block (identity, behavior, tools, security policy; identical across conversations) and a dynamic block (datetime, repo skills, secrets metadata, working context) sent *without* a cache marker. Comment: "This content should NOT be included in the cached system prompt to enable cross-conversation cache sharing." A `~/.openhands/SOUL.md` file can replace the default identity (base.py:60).
93 +
94 +This split is directly applicable to KHAELOR's Anthropic prompt-caching strategy.
95 +
96 +### 1.6 Stuck detection
97 +
98 +`StuckDetector` (`sdk/conversation/stuck_detector.py`) scans a bounded window (20 events, `MAX_EVENTS_TO_SCAN_FOR_STUCK_DETECTION`) after the last user message for four patterns: repeated action→observation cycles, repeated action→error cycles, agent monologue (repeated messages with no user input), and alternating action/observation loops. Thresholds are configurable (`StuckDetectionThresholds`). On detection the run loop sets `ConversationExecutionStatus.STUCK` and stops; it also supports "nudging" (injecting a corrective message once per error event, tracked by `_last_nudged_error_event_id`). Deliberately windowed "to avoid materializing large file-backed event logs."
99 +
100 +---
101 +
102 +## 2. Conversation / Session Lifecycle
103 +
104 +### 2.1 State machine
105 +
106 +`ConversationExecutionStatus` (`sdk/conversation/state.py:48`): `IDLE → RUNNING → (PAUSED | WAITING_FOR_CONFIRMATION | FINISHED | ERROR | STUCK | DELETING)`, with `is_terminal()` = {FINISHED, ERROR, STUCK}. Explicitly documented subtlety: IDLE is *not* terminal — it's the pre-run state.
107 +
108 +### 2.2 The run loop
109 +
110 +`LocalConversation.run()` (`sdk/conversation/impl/local_conversation.py:1857`) is the outer loop:
111 +
112 +```
113 +while True:
114 + with state (FIFO lock):
115 + if PAUSED or STUCK: break
116 + if FINISHED: run Stop hooks (may veto and inject feedback → keep running); break
117 + if stuck detected: mark STUCK / nudge; continue
118 + if WAITING_FOR_CONFIRMATION: set RUNNING (user re-invoked run() = implicit approval)
119 + agent.step(...)
120 + if WAITING_FOR_CONFIRMATION: break # actions created, awaiting user
121 + if budget exceeded: emit MaxBudgetReached error; break
122 + if iteration >= max_iteration_per_run (500): emit MaxIterationsReached; break
123 +```
124 +
125 +Notable details:
126 +
127 +- **Concurrent user messages are never lost**: the loop deliberately does *not* break immediately on FINISHED before re-checking — `send_message()` (line 1761) resets FINISHED/STUCK → IDLE under the same FIFO lock, so a message arriving while the agent finishes gets processed on the next iteration (comment block at line 1952 documents this handshake precisely).
128 +- Errors wrap into `ConversationRunError` carrying the conversation id and persistence dir "for better UX", and a `ConversationErrorEvent` is appended unless the agent already surfaced a richer one.
129 +- A `CancellationToken` (`sdk/conversation/cancellation.py`) threads through batches and tool execution for interruption; `pause()` acquires the state lock between steps.
130 +- `arun()`/`astep()` mirror everything async, with `_released_state_lock_during_io()` releasing the state lock only for the network wait so `send_message()` stays responsive — a whole class of lock gymnastics (`FIFOLock`, `_step_holds_state_lock`, issue #3485 workarounds) forced by Python's thread model.
131 +
132 +### 2.3 Event log as source of truth — file-per-event
133 +
134 +`EventLog` (`sdk/conversation/event_store.py`) is the persistence heart:
135 +
136 +- **One JSON file per event**: `events/event-{idx}-{event_id}.json` under the conversation's persistence dir; append-only; written via a `FileStore` abstraction (`sdk/io/local.py`, `memory.py`).
137 +- Cross-process safety: a lock file (`.eventlog.lock`, 30 s timeout) plus re-sync from disk before append (`_sync_from_disk`) — multiple processes may append.
138 +- O(1) `len()`; index built once by scanning filenames (`_scan_and_build_index`); events lazily loaded and cached by index; duplicate-ID and index-gap detection with warnings.
139 +- `ConversationState.append_event()` (state.py:315) is "the single storage chokepoint: stamp parent_id, append, advance HEAD."
140 +
141 +State beyond events (`base_state.json`, `persistence_const.py`) persists the serialized agent, execution status, stats, etc., with autosave on field mutation (`_autosave_enabled`, `_dirty` tracking). Resume = load base state, `agent.verify(persisted_agent)`, rebuild the view from events, continue. `init_state` (agent.py:441) detects an existing `SystemPromptEvent` in the first events and skips re-initialization — replay-safe idempotent init.
142 +
143 +### 2.4 The conversation is a *tree*, not a list
144 +
145 +Events carry `parent_id` (`sdk/event/base.py:33`); `ConversationState.leaf_event_id` is a movable HEAD. `path_to_root(leaf)` yields the active branch; `active_branch()` excludes abandoned branches; `fork` and `navigate_to(None)` re-root. Legacy linear logs are handled by an "effective parent" fallback (event_store.py:91: no `parent_id` → previous index). This enables branch/rewind semantics (KHAELOR's future `/branch`, `/rewind`) directly on the event log — but it costs real complexity: `head_is_empty` sentinels, `ROOT_PARENT_ID` sentinels, artifact-event skipping (state.py:263 documents bug #4057), cycle detection.
146 +
147 +### 2.5 The View: cached projection of the event log
148 +
149 +`View` (`sdk/context/view/view.py`) is the derived, LLM-facing projection: `View.from_events(...)` folds `Condensation` events into the list and enforces **properties** (`sdk/context/view/properties/`) — invariants required by LLM APIs (e.g., tool_use/tool_result pairing). `manipulation_indices` computes the set of indices where the event list can be safely cut without violating any property — the condenser only cuts at these points. `ConversationState.view` (state.py:337) maintains this incrementally: a linear append replays only the tail (O(k)); a branch switch triggers a full rebuild (issue #3053). Events → messages conversion (`LLMConvertibleEvent.events_to_messages`, `sdk/event/base.py:108`) re-batches parallel tool calls sharing an `llm_response_id` back into a single assistant message and coalesces adjacent plain user messages.
150 +
151 +**Takeaway**: raw events are the durable truth; the LLM view is a cached, invariant-enforced projection; compaction is itself an event. This is the cleanest triad in the entire codebase.
152 +
153 +---
154 +
155 +## 3. Workspace Abstraction
156 +
157 +`BaseWorkspace` (`sdk/workspace/base.py`) is a Pydantic model with `working_dir` plus abstract `execute_command`, `file_upload`, `file_download` and git helpers (`sdk/workspace/repo.py`, `sdk/git/*` — `git_changes.py`, `git_diff.py` power the UI's diff panel). `LocalWorkspace` (`sdk/workspace/local.py`) implements them with subprocess/filesystem. `RemoteWorkspace` (`sdk/workspace/remote/base.py`) implements the same interface over HTTP against an agent-server.
158 +
159 +**The crucial subtlety**: tools do **not** route their I/O through the workspace interface. `FileEditor` opens files directly (`open(path, ...)` in `openhands-tools/openhands/tools/file_editor/editor.py`); `TerminalTool.create(conv_state, ...)` merely reads `conv_state.workspace.working_dir` to spawn a local PTY (`openhands-tools/openhands/tools/terminal/definition.py:317`). Sandboxing is achieved not by proxying each file op but by **moving the whole conversation into the sandbox**: the agent-server runs *inside* the Docker container, tools run natively there, and the client talks to `RemoteConversation`/`RemoteWorkspace` over REST/WebSocket. The `Workspace` factory (`sdk/workspace/workspace.py`) dispatches Local vs Remote.
160 +
161 +Trade-off analysis for KHAELOR: OpenHands' "relocate the agent" model gives native tool performance and zero per-op indirection, at the cost of a server, an API surface (~25 routers in `agent-server/openhands/agent_server/`: `bash_router.py`, `file_router.py`, `event_router.py`, `conversation_router.py`, `desktop_router.py`, …), and Docker plumbing. KHAELOR V1's planned in-process `Workspace` interface (readFile/writeFile/exec) is simpler and sufficient for local-only V1; the OpenHands evidence suggests keeping that interface *thin* so a future remote strategy can be "run KHAELOR's core remotely" rather than "proxy every syscall."
162 +
163 +---
164 +
165 +## 4. Tools
166 +
167 +### 4.1 Tool protocol
168 +
169 +`ToolDefinition[ActionT, ObservationT]` (`sdk/tool/tool.py:347`) — frozen Pydantic generic with:
170 +
171 +- `action_type: type[Action]` / `observation_type: type[Observation]` — schemas are **Pydantic model classes** (`sdk/tool/schema.py`), giving validation, JSON-schema export (OpenAI and MCP formats), and typed executor signatures.
172 +- `executor` — runtime-only, excluded from serialization (`SkipJsonSchema`, `exclude=True`), so persisted state stores the tool *definition*, never live handles.
173 +- Auto snake_case naming from the class name (`__init_subclass__` + `_camel_to_snake`: `TerminalTool` → `terminal`).
174 +- `ToolAnnotations` (tool.py:215) — MCP-spec behavior hints: `readOnlyHint`, `destructiveHint`, `idempotentHint`, `openWorldHint`. `readOnlyHint` is *used*: read-only tools skip risk extraction entirely (agent.py:1058).
175 +- `DeclaredResources` (tool.py:250) — tools declare resource keys for the `ParallelToolExecutor` to lock (e.g., subprocess terminal declares `("terminal:session",)`, pooled tmux declares none), so parallel tool execution serializes only actual conflicts.
176 +- Registration/resolution: tools are named specs (`Tool(name="TerminalTool")`) resolved through a registry (`sdk/tool/registry.py`) against the conversation state at init — this is what keeps the Agent serializable.
177 +
178 +Built-ins are minimal (`sdk/tool/builtins/`): `FinishTool`, `ThinkTool` (+ opt-in skill/vision tools). Real tools live in the separate `openhands-tools` package — a clean kernel/tools boundary.
179 +
180 +### 4.2 The file editor (str_replace) — studied closely
181 +
182 +`FileEditor` (`openhands-tools/openhands/tools/file_editor/editor.py`) descends from Anthropic's computer-use editor (credited at line 65). Commands: `view`, `create`, `str_replace`, `insert`, `undo_edit`.
183 +
184 +`str_replace` (editor.py:178) matching/failure behavior:
185 +
186 +1. Reads the whole file, finds all occurrences with `re.escape(old_str)` (literal matching), recording **line numbers** per match.
187 +2. Zero matches → retries with `old_str.strip()` (whitespace tolerance) — but deliberately does **not** strip `new_str` ("stripping it would silently drop meaningful leading/trailing whitespace… the caller asked to write").
188 +3. Still zero → `ToolError: "No replacement was performed, old_str `…` did not appear verbatim in {path}."`
189 +4. More than one → `"Multiple occurrences of old_str `…` in lines [n1, n2]. Please ensure it is unique."` — the line numbers are what makes this error *actionable* for the model.
190 +5. Success → writes, saves the previous content into `FileHistoryManager` (10 entries per file, enabling `undo_edit`), and returns a **snippet** of the edited region (± `SNIPPET_CONTEXT_WINDOW` lines) plus "Review the changes and make sure they are as expected. Edit the file again if necessary." — the model verifies its own edit without a follow-up read.
191 +
192 +Supporting quality work: `validate_path` (editor.py:626) rejects relative paths with a suggestion — "The path should be an absolute path. Maybe you meant {cwd/path}?" — and gives distinct errors for create-on-existing, missing paths, and directory misuse; `EncodingManager` auto-detects encodings (`utils/encoding.py`); binary detection via `binaryornot`; images returned as base64 `ImageContent`; directory `view` lists 2 levels with hidden-file counts; file size guard (10 MB); observations carry `old_content`/`new_content` so downstream UIs can render diffs.
193 +
194 +### 4.3 The terminal tool
195 +
196 +`TerminalTool` (`openhands-tools/openhands/tools/terminal/definition.py`, `impl.py`, `terminal/` backends) is a **persistent stateful session**, not one-shot exec:
197 +
198 +- Backends auto-detected: tmux, plain subprocess PTY, or PowerShell (`create(..., terminal_type=...)`).
199 +- `TerminalAction`: `command`, `is_input` (send keystrokes to the *running* process — `C-c`, arrows, `ENTER`…), `timeout`, `reset`.
200 +- **Soft timeout model**: with no explicit timeout, a command that produces no new output for `NO_CHANGE_TIMEOUT_SECONDS` returns early with `exit_code = -1` ("process still running"); the model can then send input, wait (empty command), or `C-c`. This lets one blocking-style tool approximate background processes — but it is a *convention the model must learn*, encoded in long schema descriptions.
201 +- `TerminalObservation.to_llm_content` appends PS1-harvested metadata: `[Current working directory: …]`, `[Python interpreter: …]`, `[Command finished with exit code N]` (`metadata.py` parses a custom PS1 block).
202 +- Output truncation: `maybe_truncate` (`sdk/utils/truncate.py:50`) keeps **head and tail** (middle-out truncation), and optionally **saves the full output to a file** (`save_dir`, `tool_prefix="terminal"`) referencing it in the notice — the model can go read the full log. Same utility used by the editor and browser tools.
203 +
204 +KHAELOR's decision to split `bash` (short-lived) from a real `process` manager (start/list/read/write/stop) is *stronger* than OpenHands' single soft-timeout terminal; but the metadata suffix, PTY-backed session persistence, `is_input` keystroke channel, and save-full-output-to-file patterns are all worth adopting.
205 +
206 +### 4.4 grep / glob
207 +
208 +`openhands-tools/openhands/tools/grep/impl.py` prefers **ripgrep** and falls back to system grep with an explicit logged warning (`_check_ripgrep_available`, `_log_ripgrep_fallback_warning`); `glob/` mirrors this. Results are bounded, structured observations — consistent with KHAELOR §10's "never dump thousands of lines into model context."
209 +
210 +---
211 +
212 +## 5. Event System
213 +
214 +- `Event` (`sdk/event/base.py:20`): frozen Pydantic, `extra="forbid"`, `id` (uuid), `timestamp`, `source: SourceType` (`agent | user | environment`), `parent_id`. Polymorphic serialization via `DiscriminatedUnionMixin` (`sdk/utils/models.py`) — a `kind` discriminator lets `Event.model_validate_json` reconstruct the right subclass from disk. (In TypeScript this is a native discriminated union — none of this machinery is needed.)
215 +- `LLMConvertibleEvent` adds `to_llm_message()`; concrete types live in `sdk/event/llm_convertible/`: `SystemPromptEvent` (embeds the system prompt *and* the tool list — the prompt actually sent is part of history), `MessageEvent`, `ActionEvent` (tool_call, typed `action`, `thought`, `thinking_blocks`, `security_risk`, `summary`, `llm_response_id`), `ObservationEvent`, `AgentErrorEvent`, `UserRejectObservation`.
216 +- Non-LLM events: `Condensation`/`CondensationRequest` (`event/condenser.py`), `PauseEvent`, `InterruptEvent`, `ConversationErrorEvent`, `ConversationStateUpdateEvent` (server→client state sync artifact, explicitly *not* a tree node — state.py:326), `TokenEvent` (vLLM token ids), hook events.
217 +- **State reconstruction**: everything the LLM sees is derived from events (`View.from_events`), and everything the UI shows is derived from events (the agent-server streams them over WebSocket via `event_router.py` / `event_service.py`; the TS client in `openhands/src` consumes them). Replay/resume is therefore trivial-by-construction.
218 +- Wart: every event and observation also carries a `visualize -> rich.Text` property (base.py:52, terminal definition.py:204 colors error lines red, adds emoji). Presentation is welded into domain objects — convenient for their CLI visualizer, wrong for a system with a real UI layer. KHAELOR should keep rendering strictly out of event types.
219 +
220 +Streaming deltas: a `streaming_delta.py` event exists and `on_token: TokenCallbackType` callbacks (raw litellm `ModelResponseStream` chunks, `sdk/llm/streaming.py`) thread from `LLM.completion` through `agent.step` to the conversation — but streaming is **optional and degraded gracefully to off** ("Streaming requested without an on_token callback; falling back to a non-streaming completion", llm.py:1500). The architecture is fundamentally request/response with streaming bolted on; events are appended only when complete.
221 +
222 +---
223 +
224 +## 6. Security: Analyzer + Policy + Confirmation
225 +
226 +The design cleanly separates **risk assessment** from **confirmation decision**:
227 +
228 +1. **`SecurityRisk`** (`sdk/security/risk.py`): `UNKNOWN | LOW | MEDIUM | HIGH`, with deliberate semantics — UNKNOWN is *incomparable* (comparisons raise `ValueError`) rather than silently lowest; careful `__gt__` overrides because `str` mixin MRO would otherwise give alphabetical ordering (documented at line 126).
229 +2. **`SecurityAnalyzerBase`** (`sdk/security/analyzer.py`): `security_risk(action) -> SecurityRisk`; analysis errors default to **HIGH** ("Default to HIGH risk on analysis error for safety", line 108). The default `LLMSecurityAnalyzer` (`sdk/security/llm_analyzer.py`) simply returns the model's own `security_risk` argument — the schema-injected self-assessment. Heavier analyzers exist (`llm_analyzer` ensembles, `grayswan/`, `toolshield_llm_analyzer.py`, a shell AST parser `_shell_ast.py`/`shell_parser.py` for command-level analysis).
230 +3. **`ConfirmationPolicyBase`** (`sdk/security/confirmation_policy.py`): `AlwaysConfirm`, `NeverConfirm`, `ConfirmRisky(threshold=HIGH, confirm_unknown=True)` — pure functions from risk to bool, stored on `ConversationState`.
231 +4. **Flow** (`Agent._requires_user_confirmation`, agent.py:1015): after actions are created (and *persisted as events*) but before execution, analyze all → if any risk triggers the policy, set `WAITING_FOR_CONFIRMATION` and stop the run loop. Approval = calling `run()` again (pending unmatched actions execute first thing in the next step); rejection = `reject_pending_actions()` which appends `UserRejectObservation` events (the model sees *why*). `FinishAction`/`ThinkAction` never require confirmation; `readOnlyHint` tools bypass risk extraction.
232 +
233 +Honest assessment: LLM self-assessed risk is cheap and surprisingly usable, but the model grades its own homework — a system prompt section (`security_policy` in the prompt registry, base.py:223) instructs it how. KHAELOR's capability-based policy (`file.write.project: allow`, `process.execute: ask`…) is *deterministic* and should remain primary; an LLM-self-assessment field is a reasonable *supplementary* signal for the `ask` tier, and the "unmatched action events = pending approval" persistence trick is directly reusable (approvals survive restarts for free).
234 +
235 +---
236 +
237 +## 7. LLM Layer
238 +
239 +`LLM` (`sdk/llm/llm.py`, **~2,300 lines**) is a Pydantic model wrapping **litellm** for any-provider support:
240 +
241 +- Two API styles: `completion()` (Chat Completions) and `responses()` (OpenAI Responses API), sync + async variants — four near-duplicate code paths.
242 +- **Retries**: a tenacity-based `RetryMixin` (`sdk/llm/mixins/`) with exponential backoff, retry listeners, and typed exception mapping (`sdk/llm/exceptions/` — `LLMContextWindowExceedError`, `LLMMalformedConversationHistoryError`, `LLMContentPolicyViolationError`, etc.) that the agent loop branches on. Mapping provider errors into a **typed taxonomy the kernel can react to** is the key idea.
243 +- **Prompt caching**: cache markers on the static system block; a dedicated fallback when the provider rejects too-small cache blocks (`is_prompt_cache_too_small` → retry with `caching_prompt=False`, llm.py:1552).
244 +- **Telemetry / cost** (`sdk/llm/utils/telemetry.py`, `metrics.py`): `Telemetry.on_response` records real usage — prompt/completion tokens, **`cache_read_tokens` / `cache_write_tokens`**, latency, per-call `Cost` computed from litellm pricing data, accumulated into `Metrics` (with a documented `cache_hit_rate` subtlety for providers that report cache reads separately). Snapshots ride on `LLMResponse` and aggregate into `ConversationStats` (`sdk/conversation/conversation_stats.py`) — per-conversation cost is real data, never estimated. This satisfies KHAELOR Absolute Rule #4 by construction.
245 +- **Non-native tool calling**: `NonNativeToolCallingMixin` fakes function calling via prompting for weak models; `fix_malformed_tool_arguments` repairs common mistakes.
246 +- Extras KHAELOR doesn't need: `RouterLLM`, fallback strategies (`fallback_strategy.py`), `LLMRegistry`, profile stores, subscription auth, OpenRouter/AWS header plumbing, vLLM token-id events.
247 +
248 +For Anthropic-only KHAELOR, the lessons are: (1) typed error taxonomy consumed by the kernel, (2) real usage accounting incl. cache tokens, (3) static/dynamic prompt split for caching, (4) retry with backoff at the model layer. The 2,300-line universal adapter is precisely what `ModelClient` must *not* become.
249 +
250 +---
251 +
252 +## 8. Context Management: Condensers
253 +
254 +`CondenserBase` (`sdk/context/condenser/base.py`): `condense(view) -> View | Condensation`. `RollingCondenser` adds `condensation_requirement(view) -> HARD | SOFT | None` and `get_condensation(view)`, with graceful degradation: SOFT requirement + no condensation available → return the uncondensed view; HARD (agent literally cannot proceed) → `hard_context_reset()` last resort.
255 +
256 +`LLMSummarizingCondenser` (`llm_summarizing_condenser.py`): triggers when the view exceeds `max_size` (default 240 events) **or** on an explicit `CondensationRequest`; keeps the first `keep_first` (default 2) events (system prompt + first user message), summarizes a middle range with a dedicated LLM call, and keeps a recent suffix — cutting only at `view.manipulation_indices` so tool_use/tool_result pairs are never split.
257 +
258 +The structural insight worth stealing wholesale: **a condensation is an event in the log** (`Condensation` carries the summary + the forgotten range). The raw events remain on disk; the View projection applies condensations deterministically on every rebuild; `/context`-style inspection and un-condensation are possible by construction; and condensation doubles as the *recovery path* for context-window and malformed-history errors. Two triggers (proactive size threshold + reactive `CondensationRequest` from exceptions) give defense in depth.
259 +
260 +Gap vs KHAELOR's plan: OpenHands measures pressure in **event count**, not tokens (token counting exists in `sdk/llm/utils/` but isn't the default trigger), and its summary is one LLM-written blob rather than KHAELOR's structured checkpoint (objective / completed / failed_attempts / running_processes / next_steps). KHAELOR should keep its structured checkpoint schema and token-based budgeting, layered on OpenHands' event-sourced compaction mechanics.
261 +
262 +---
263 +
264 +## 9. Framework Complexity KHAELOR Should Not Inherit
265 +
266 +Traced concretely, the weight is real:
267 +
268 +- **`LocalConversation.__init__`** (`local_conversation.py:200`) takes ~28 parameters and its module imports plugins, skills, marketplaces, subagents, MCP clients, hooks, credential binding, secret ciphers, ACP agents, observability, and title generation — the file is ~2,800 lines. The lifecycle object became a god object even though the *concepts* around it are clean.
269 +- **`AgentBase` is polluted by integrations**: MCP config, MCP dynamic tool reconciliation (`_on_mcp_tools_changed`, `_on_mcp_tools_reconciled` — ~110 lines of lock-guarded races in base.py:904–1012), ACP capability flags (`supports_openhands_tools`, `agent_kind`), skills auto-attachment, vision fallback tools. The "small kernel" rule exists precisely to prevent this accretion.
270 +- **`Agent.step()` itself** carries vision-model fallbacks, vLLM token events, critic evaluation, hook-blocked bookkeeping, and observability decorators inline — the minimal loop is buried.
271 +- **Agent-server**: FastAPI app with ~25 routers + services (`bash_service.py`, `desktop_service.py`, VSCode/desktop integration, sockets, `docker/` build tooling, `agent-server.spec` PyInstaller packaging). Necessary for their cloud product; pure liability for a terminal-native tool.
272 +- **Threading/locking**: `FIFOLock`, `_released_state_lock_during_io`, `_step_holds_state_lock`, per-issue workarounds (#3485, #3053, #4057) — much of this evaporates in a single-threaded TS event loop with structured async.
273 +- **Pydantic discriminated-union machinery** (`DiscriminatedUnionMixin`, `kind_of`, subclass registries) — TypeScript unions + a `type` field give this for free.
274 +- **Microagents/skills/plugins/marketplace/profiles/critics/hooks** — six extension systems interleaved with the core. KHAELOR V1 needs zero of them.
275 +
276 +Verdict on the CLAUDE.md §3.3 question — *can KHAELOR adopt the principles without the framework weight?* **Yes, demonstrably**: the principles (stateless agent config, event-sourced state, view projection, condensation-as-event, risk/policy split, typed tool protocol) are all expressible in a few small modules; the weight comes from multi-provider support, remote orchestration, and extension systems that KHAELOR V1 explicitly excludes.
277 +
278 +---
279 +
280 +## WHAT OPENHANDS DOES VERY WELL
281 +
282 +1. **Event log as the single source of truth.** Append-only file-per-event JSON (`event_store.py`), O(1) length, lazy load, cross-process locking; conversation state, LLM context, and UI are all projections of it. Resume and replay are trivial-by-construction, and idempotent `init_state` makes restarts safe.
283 +2. **Condensation as an event.** Compaction lives *in* the history; the `View` re-applies it deterministically, cuts only at API-safe `manipulation_indices`, and doubles as the recovery path for context-window and malformed-history errors (SOFT/HARD requirement model).
284 +3. **Stateless, frozen agent configuration + a precise resume contract.** `AgentBase.verify`: same class, tools add-only; everything else swappable between sessions.
285 +4. **Typed error taxonomy consumed by the loop.** Provider chaos is mapped to `LLMContextWindowExceedError` / `LLMMalformedConversationHistoryError` / etc., and each has a distinct, sensible kernel reaction; recoverable tool errors go back to the *model* as concise events (parameter names, not values), not to the user.
286 +5. **The str_replace editor's failure UX.** Literal matching with strip-retry, multiple-occurrence errors that cite line numbers, "Maybe you meant {abs path}?", post-edit snippet for self-verification, per-file undo history, encoding detection.
287 +6. **Risk/policy separation with persistence-native confirmation.** Analyzer produces `SecurityRisk` (UNKNOWN incomparable, errors default HIGH); policy decides; pending approval = unmatched ActionEvents in the log, so approvals survive restarts; `readOnlyHint` short-circuits; rejections become observations the model learns from.
288 +7. **Prompt-caching-aware system prompt architecture.** Static cacheable block + dynamic uncached block, with a fallback when cache minimums aren't met.
289 +8. **Honest accounting.** Cost/token metrics (incl. cache read/write) come exclusively from real API usage metadata, snapshotted per response, aggregated per conversation.
290 +9. **Output truncation done right.** Middle-out head+tail truncation with the full output saved to disk and referenced, so nothing is irrecoverably lost.
291 +10. **They proved the SDK-core split.** The flagship product is now a thin TS client over the SDK — validation that a clean kernel supports any front end.
292 +
293 +## WHAT OPENHANDS DOES POORLY
294 +
295 +1. **Streaming is an afterthought.** `on_token` callbacks pass raw litellm chunks, silently degrade to non-streaming, and events only exist post-completion. The architecture is request/response at heart — unacceptable for a terminal UI where streaming is the product.
296 +2. **The kernel is not small.** `Agent.step` and `LocalConversation` absorbed MCP reconciliation, plugins, skills, hooks, critics, ACP branching, vision fallbacks, and observability; `LocalConversation.__init__` has ~28 parameters. The exact god-object failure KHAELOR's Absolute Rule #3 guards against.
297 +3. **Presentation welded into domain objects.** Every event/observation carries a Rich `visualize` property (emoji, color heuristics) — rendering policy trapped in the data layer.
298 +4. **No terminal product.** The interactive surfaces are a web app and a debug visualizer; nothing here informs TUI excellence.
299 +5. **A 2,300-line universal LLM adapter.** litellm + two API styles × sync/async = four near-duplicate call paths, provider header plumbing, routers, registries — the cost of multi-provider generality.
300 +6. **Concurrency by locks and workarounds.** FIFOLock re-entrancy tricks, releasing locks mid-await, flags like `_step_holds_state_lock`, multiple issue-numbered patches — accidental complexity from Python threads.
301 +7. **Event-count context pressure.** Condensation triggers on number of events (`max_size=240`), not token budget; token pressure is handled reactively via exceptions.
302 +8. **Default security analyzer is self-assessment.** The model rates the risk of its own actions; deterministic analysis exists but is opt-in.
303 +9. **Background work via soft-timeout convention.** One terminal with `exit_code=-1`/`is_input` semantics the model must learn from prose descriptions, instead of an explicit process manager.
304 +10. **Tree-of-events edge-case debt.** Legacy parent fallbacks, `ROOT_PARENT_ID`/`head_is_empty` sentinels, artifact-event skipping — powerful branching paid for with subtle invariants (#4057).
305 +
306 +## WHAT KHAELOR SHOULD ADOPT
307 +
308 +1. **Event-sourced sessions**: append-only per-event JSON files as the source of truth; typed events with `id`/`timestamp`/`source`; session resume = replay; idempotent init (skip if system-prompt event exists). Map directly onto KHAELOR's typed event bus (§7–8).
309 +2. **View-as-projection + compaction-as-event**: a cached, incrementally-updated LLM view derived from events; `ContextCompacted` as a persisted event; only cut at boundaries that preserve Anthropic tool_use/tool_result pairing; dual trigger (proactive budget + reactive context-window error recovery). Keep KHAELOR's structured checkpoint YAML as the summary payload and use **token**-based budgets.
310 +3. **Stateless agent/kernel config + the resume contract** (tools add-only; model/config freely swappable).
311 +4. **The str_replace editor playbook** for KHAELOR's `edit` tool: literal match, whitespace strip-retry on match only, unique-occurrence enforcement with line numbers in the error, absolute-path suggestion, post-edit snippet/diff, per-file undo history, atomic writes.
312 +5. **Risk/policy separation grafted onto capabilities**: KHAELOR's deterministic capability evaluator (`file.write`, `process.execute`) as the analyzer; `allow/ask/deny` as the policy; pending-approval represented as persisted unexecuted action events; UNKNOWN treated as unsafe; analyzer failure ⇒ ask; read-only capability short-circuit; rejection reasons fed back to the model as observations.
313 +6. **Typed model-error taxonomy** in the Anthropic client (overloaded/rate-limit/context-exceeded/invalid-request) with distinct kernel reactions; agent self-consumes recoverable tool errors with concise, name-only messages.
314 +7. **Static/dynamic system prompt split** for Anthropic prompt caching, and **usage accounting from real API metadata only** (input/output/cache-read/cache-write, per-session accumulation).
315 +8. **Middle-out truncation + full-output spill files** for tool observations; terminal observations annotated with cwd/exit-code metadata.
316 +9. **Tool protocol shape**: typed Action/Observation schemas per tool, runtime executor excluded from serialization, behavior annotations (read-only/destructive), auto-derived names, `summary` argument on tool schemas for one-line action descriptions the TUI can display in collapsed tool rows.
317 +10. **ripgrep-first search with explicit fallback**, bounded structured results.
318 +11. **Windowed stuck detection** (repeat action/observation, repeat errors, monologue) as a cheap kernel-adjacent service — inform the user rather than silently looping.
319 +
320 +## WHAT KHAELOR SHOULD NOT COPY
321 +
322 +1. **The universal LLM adapter** (litellm, routers, fallback registries, dual API styles, non-native tool-calling mocks). KHAELOR is Anthropic-only behind one small `ModelClient`.
323 +2. **Bolted-on streaming.** Invert it: KHAELOR's kernel emits `TextDelta`/`ToolInputDelta`/`ThinkingDelta` events natively; non-streaming is the degenerate case, never the default.
324 +3. **The agent-server / Docker / remote-workspace stack** — FastAPI routers, WebSockets, PyInstaller specs, sandbox images. V1 is a local process; keep only a thin `Workspace` interface so remoting stays *possible*.
325 +4. **Extension systems in the kernel**: MCP reconciliation, skills, plugins, marketplace, profiles, critics, hooks, subagent registries inside Agent/Conversation. Design event-bus seams for them; implement none in V1.
326 +5. **`visualize` on domain objects.** Rendering lives in `src/tui/tool-view/`, keyed by event type — never on the event.
327 +6. **Lock-based concurrency gymnastics.** Use the single-threaded event loop, one session-serialized command queue, and `AbortController`-style cancellation instead of FIFO re-entrant locks released mid-await.
328 +7. **The full event-*tree* in V1.** Keep `parent_id` in the event schema (cheap future-proofing for `/branch`/`/rewind`), but ship a linear log; OpenHands shows branching works *and* shows its sentinel/legacy-fallback tax.
329 +8. **Event-count-triggered compaction** — budget in tokens against the real context window.
330 +9. **Soft-timeout terminal as the only background story** — KHAELOR's explicit `process` manager (start/list/read/write/stop) is the better design; keep the PTY session + metadata ideas, drop the `-1` exit-code convention as the primary mechanism.
331 +10. **LLM self-assessed risk as the default gate** — deterministic capability rules first; self-assessment at most as a supplementary signal.
332 +11. **Discriminated-union serialization frameworks** — use native TypeScript tagged unions with a `type` field and a schema-validated (e.g. zod) decode at the persistence boundary.
333 +
334 +---
335 +
336 +*Author: Simon-Pierre Boucher · contact@spboucher.ai*
added eslint.config.mjs +25 −0
@@ -0,0 +1,25 @@
1 +/**
2 + * KHAELOR
3 + * File: eslint.config.mjs
4 + * Description: ESLint flat configuration — strict TypeScript rules (headers enforced by scripts/check-headers.sh).
5 + *
6 + * Author: Simon-Pierre Boucher
7 + * Contact: contact@spboucher.ai
8 + */
9 +
10 +import tseslint from 'typescript-eslint';
11 +
12 +export default tseslint.config(
13 + ...tseslint.configs.recommended,
14 + {
15 + files: ['src/**/*.ts', 'src/**/*.tsx'],
16 + rules: {
17 + '@typescript-eslint/no-unused-vars': ['error', { argsIgnorePattern: '^_' }],
18 + '@typescript-eslint/consistent-type-imports': 'error',
19 + 'no-console': 'error',
20 + },
21 + },
22 + {
23 + ignores: ['dist/', 'node_modules/', 'references/'],
24 + },
25 +);
added package-lock.json +3141 −0
@@ -0,0 +1,3141 @@
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added package.json +39 −0
@@ -0,0 +1,39 @@
1 +{
2 + "name": "khaelor",
3 + "version": "0.1.1",
4 + "description": "KHAELOR — a terminal-native autonomous engineering agent powered by Anthropic.",
5 + "author": "Simon-Pierre Boucher <contact@spboucher.ai>",
6 + "license": "UNLICENSED",
7 + "type": "module",
8 + "bin": {
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10 + },
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12 + "dist",
13 + "README.md"
14 + ],
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16 + "node": ">=22"
17 + },
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19 + "build": "tsc -p tsconfig.json",
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21 + "test": "vitest run",
22 + "test:watch": "vitest",
23 + "typecheck": "tsc --noEmit",
24 + "lint": "eslint src",
25 + "check:headers": "bash scripts/check-headers.sh",
26 + "check": "npm run typecheck && npm run lint && npm run test && npm run check:headers"
27 + },
28 + "dependencies": {
29 + "@anthropic-ai/sdk": "^0.70.0"
30 + },
31 + "devDependencies": {
32 + "@types/node": "^22.10.0",
33 + "eslint": "^9.20.0",
34 + "tsx": "^4.19.0",
35 + "typescript": "^5.7.0",
36 + "typescript-eslint": "^8.24.0",
37 + "vitest": "^3.0.0"
38 + }
39 +}
added prototypes/tui-spike/RESULTS.md +128 −0
@@ -0,0 +1,128 @@
1 +<!--
2 +KHAELOR
3 +File: prototypes/tui-spike/RESULTS.md
4 +Author: Simon-Pierre Boucher
5 +Contact: contact@spboucher.ai
6 +-->
7 +
8 +# TUI Framework Spike — Results (ADR-14 / TUI_DESIGN §15)
9 +
10 +**Date:** 2026-08-09
11 +**Environment:** macOS 27.0 (Apple Silicon), Node v25.9.0 (spike targets Node ≥ 22), pty `xterm-256color` 100×30 via node-pty, sources run with `tsx`.
12 +
13 +**Candidate naming.** This spike uses the task's labels, which are swapped relative to TUI_DESIGN §15.1:
14 +
15 +| This document | Implementation | TUI_DESIGN §15.1 label |
16 +|---|---|---|
17 +| **Candidate A** — `candidate-a/main.ts` | custom ANSI renderer (print-once scrollback + damage-tracked live region + DEC 2026 frames + 16 ms coalescing) | candidate (b) |
18 +| **Candidate B** — `candidate-b/main.tsx` | Ink 7.1.1 control (`<Static>` for settled content + bounded live tree) | candidate (a) |
19 +
20 +Both candidates render the identical shared demo model (`shared/demo.ts`): ~2 KB of markdown-ish text streamed at ~30 deltas/s per turn (8-char deltas / 33 ms), settled-block scanning, tool one-liners settling mid-stream, a live status line with a real elapsed timer, a composer echoing keystrokes during streaming, and a status bar. Esc interrupts, restores the terminal, and exits cleanly. Instrumentation is shared (`shared/metrics.ts`).
21 +
22 +---
23 +
24 +## 1. Decision table (7 criteria × 2 candidates)
25 +
26 +| # | Criterion (§15.3) | Candidate A — custom ANSI | Candidate B — Ink 7 | Verified how |
27 +|---|---|---|---|---|
28 +| 1 | Flicker-free streaming | **Pass (proxy)** — 9,083/9,084 writes are DEC 2026-wrapped frames; 0 full-screen clears; per-row damage repaints (avg 1.9 rows/frame) | **Pass (proxy)** — Ink 7 also wraps every frame in DEC 2026 (8,905 markers ≈ 8.9K frames); 0 full-screen clears; but rewrites the whole live region every frame (avg 8.8 erase-line ops/frame) | Programmatic ANSI-op audit of pty capture. **Human eyeball + asciinema pass on the 6-terminal matrix still required** (§4) |
29 +| 2 | Stable input line / caret | **Pass** — every one of 9,083 frames ends by parking the hardware cursor at the composer caret column (`CSI nG` + show-cursor + sync-off verified in capture) | **Fail as-stock** — Ink hides the hardware cursor at mount (1× `?25l`) and only restores it at exit; there is **no caret at all** during the run. A synthetic caret (drawn glyph) or manual post-frame cursor writes would be required | Capture audit: cursor-park sequence count (A), cursor hide/show count (B) |
30 +| 3 | Input latency < 16 ms p95 | **Pass** — p50 **0.055 ms**, p95 **0.104 ms**, max 0.42 ms (4,232 samples, 0 unresolved) | **Pass** — p50 **1.31 ms**, p95 **2.07 ms**, max 4.35 ms (4,225 samples, 0 unresolved); stable over time (p95 last-30 s ≈ first-30 s) | In-process `process.hrtime.bigint()`: stdin-byte arrival → first `stdout.write()` containing the new composer text, typing at 30 cps during full-rate streaming (§3.2) |
31 +| 4 | Long-session memory: flat slope, < 150 MB | **Pass** — RSS 72 → 78 MB over 180 s (sequential run: 62 → 67 MB); heap flat at ~9.6 MB; residual RSS creep ≈ +0.3–1.2 MB/min and decelerating | **Fail** — RSS 126 → **272 MB** over 180 s (crossed 150 MB in ~20–30 s of load); heap 93 MB and climbing; fitted slope +48.6 MB/min (last-60 s +11.1 MB/min, still positive) | 1 s `process.memoryUsage()` sampling; least-squares slope; raw timelines in `out/metrics-*.json` |
32 +| 5 | Terminal-native selection/copy | **Pass (proxy)** — settled fenced code block appears byte-identical in ANSI-stripped capture; settled content emitted once via plain scrollback writes | **Pass (proxy)** — same check passes; `<Static>` output is plain and printed once | Driver check `settledFenceBlockByteIdentical` vs `FENCE_TEXT` source. **Human select/copy/paste/diff mid-stream still required** (§4) |
33 +| 6 | Node-only (`npm i -g`, no Bun, no native build) | **Pass** — zero runtime dependencies; plain Node + ANSI | **Pass** — ink 7.1.1 + react 19 install without a native build step (Yoga ships as WASM). (node-pty is a *driver-only* dev dependency, not part of either renderer) | `npm install` on this machine; dependency audit |
34 +| 7 | Resize integrity | **Pass** — 4 live pty resizes mid-stream (100×30→120×30→60×30→200×45→100×30): real SIGWINCH handled, full live repaint at new width, **0 over-width lines emitted**, no corrupted-frame sequences, no crash, run completed | **Pass** — same plan: Ink re-lays-out on resize, 0 over-width lines, no crash | node-pty `resize()` during streaming + per-write visible-width audit against current cols. **Human visual check recommended** |
35 +
36 +**Score: A passes 7/7 (2 pending human confirmation); B passes 5/7, failing #4 (memory) outright and #2 (caret) as-stock.**
37 +
38 +---
39 +
40 +## 2. Raw numbers (final 180 s runs, identical workload: 20 turns, 381 settled blocks, ~5,400 synthetic keystrokes, 4 resizes)
41 +
42 +| Metric | A — custom ANSI | B — Ink 7 |
43 +|---|---|---|
44 +| Echo latency p50 / p95 / max (ms) | 0.055 / **0.104** / 0.42 | 1.31 / **2.07** / 4.35 |
45 +| Latency samples / unresolved | 4,232 / 0 | 4,225 / 0 |
46 +| RSS start → end (MB) | 72.0 → **78.1** | 126.1 → **272.0** |
47 +| RSS fitted slope (MB/min, last ⅔ of run) | +0.62 | +48.64 |
48 +| Heap at end (MB) | 9.6 | 93.4 |
49 +| stdout writes / sec | 50.5 | 152.7 |
50 +| Bytes written (180 s) | 1.10 MB | 3.04 MB |
51 +| DEC 2026 synchronized frames | 9,083 (= every frame) | 8,905 (= every frame, ~3 writes each) |
52 +| Live rows rewritten per frame (avg) | **1.9** (damage-tracked; 8,121 partial vs 962 full frames) | ~8.8 (entire live region, every frame) |
53 +| Full-screen clears (`CSI 2J`/`3J`) | 0 | 0 |
54 +| Over-width lines after resizes | 0 | 0 |
55 +| Settled fence block byte-identical in scrollback | yes | yes |
56 +| First-party source lines | 229 (renderer ≈ 120 of them) | 157 (+ ink + react dependency surface) |
57 +
58 +Corroborating runs: 60 s and 120 s runs show the same shape (A: 67–76 MB flat-ish, p95 ≈ 0.1 ms; B: slope +56 to +70 MB/min, p95 ≈ 2 ms). Raw JSON: `out/summary-a.json`, `out/summary-b.json` (60/120 s snapshots preserved as `out/summary-*-60s/120s/180s.json`), full pty captures in `out/capture-*.txt`.
59 +
60 +---
61 +
62 +## 3. Methodology (and honest limitations)
63 +
64 +### 3.1 Harness
65 +
66 +`driver/run.ts` spawns each candidate inside a **real pty** (node-pty, `xterm-256color`, 100×30) so raw mode, SIGWINCH, and TTY code paths are genuine. It injects one keystroke every 33 ms (30 cps) from t = 1.5 s, presses Enter every 40 chars (submits the composer as a settled user message — this also exercises settling during streaming), resizes the pty four times mid-stream, and sends Esc at the end. All measurement is **in-process in the candidate** (`shared/metrics.ts`), written to `out/metrics-<cand>.json` on clean Esc teardown.
67 +
68 +Note: node-pty 1.1.0's prebuilt `spawn-helper` ships without its executable bit on this setup; the harness required a one-time `chmod +x node_modules/node-pty/prebuilds/darwin-arm64/spawn-helper`.
69 +
70 +### 3.2 Latency definition
71 +
72 +Latency = `process.hrtime.bigint()` at the stdin `'data'` event → the first `stdout.write()` whose payload contains the updated composer text (`"❯ " + composer`). This measures **renderer-side** latency (what the framework controls) up to the write-enqueue; kernel/pty/terminal paint time is excluded for both candidates equally, so the comparison is fair but the absolute numbers are a lower bound on glass-to-glass latency.
73 +
74 +Two measurement artifacts were found and fixed during the spike — worth recording because naive numbers were wildly wrong:
75 +
76 +1. **Trailing-space needles.** Ink/Yoga trims trailing whitespace at line ends, so an expectation created by a space keystroke never matches any frame and jammed the FIFO (apparent p95 of 1.8 s that was pure artifact — echo was actually ~1–2 ms, confirmed via `driver/debug-ink-input.tsx`). Fix: space keystrokes are not measured; needles are `trimEnd()`ed. Applied identically to both candidates.
77 +2. **CR merged into string input.** Under momentary event-loop lag the pty can coalesce `\r` + the next char into one chunk, which Ink delivers as string input with `key.return === false`; the raw `\r` then polluted the composer and the needle. Fix: embedded CR/LF in string input is treated as Enter (matching candidate A's decoder).
78 +
79 +After both fixes: **0 unresolved expectations in every reported run** for both candidates.
80 +
81 +### 3.3 Memory
82 +
83 +`process.memoryUsage()` sampled every 1 s inside each candidate; slope is a least-squares fit over the last two-thirds of the run. Candidate B's growth is consistent with Ink's `<Static>` design: settled items remain children of the reconciler/DOM tree for the life of the process, so retained state is O(session), exactly the risk TUI_DESIGN §0.3 called out. This attribution is a hypothesis (heap profiling was not done); the measured RSS/heap growth itself is not in question. Some of B's RSS may be reclaimable under GC pressure, but A under the identical GC policy stays ~flat at < 80 MB, so the comparison stands.
84 +
85 +### 3.4 What ran headless vs. what needs a human
86 +
87 +Everything in §1–§2 ran headless in a pty (this machine, no human at a screen). The following **cannot** be signed off programmatically and needs a human pass (TUI_DESIGN §15.2 scenario 7):
88 +
89 +- **Flicker (criterion 1):** run each candidate interactively and scrub a recording frame-by-frame on Terminal.app, iTerm2, kitty, Alacritty, VS Code terminal, and inside tmux:
90 + ```sh
91 + cd prototypes/tui-spike
92 + npm install
93 + asciinema rec -c "npm run a" /tmp/spike-a.cast # then: npm run b
94 + # type while it streams; press Esc to finish; scrub the .cast frame-by-frame
95 + ```
96 +- **Selection/copy (criterion 5):** while a turn is streaming, select the settled ```ts code block with the mouse, copy, paste to a file, and diff against `FENCE_TEXT` in `shared/demo.ts`.
97 +- **Resize (criterion 7):** drag the window narrow/wide mid-stream and confirm no corrupted rows and a clean live region at the new width.
98 +- **Caret (criterion 2), B:** observe that Ink shows no cursor while candidate A keeps a hardware caret sitting at the composer position.
99 +
100 +---
101 +
102 +## 4. Recommendation
103 +
104 +**Candidate A — the custom ANSI renderer.** This confirms TUI_DESIGN §0.3's prior, now with measurements:
105 +
106 +1. **B fails a hard criterion.** Memory is not flat and exceeds the 150 MB cap within ~30 s of this workload (272 MB at 3 min, still climbing). KHAELOR sessions run for hours; O(session) retained render state is disqualifying without forking Ink's `<Static>`/DOM internals — the exact ~100-file-fork trap Hermes fell into (HERMES §8.1).
107 +2. **B has no caret.** Stock Ink hides the hardware cursor for its full lifetime. A real composer would need a synthetic caret or hand-written post-frame cursor writes — at which point we are already reimplementing candidate A's paint discipline inside Ink.
108 +3. **A's margins are wide everywhere.** p95 echo 0.104 ms (154× inside the 16 ms budget) vs 2.07 ms; 78 MB flat vs 272 MB climbing; 1.9 rows repainted per frame vs 8.8; 2.8× fewer bytes written; zero runtime dependencies vs the ink+react surface.
109 +4. **Owned-code cost is small.** The entire renderer (live region, damage tracking, DEC 2026 frames, coalescing, settled printing, caret parking) is ~120 lines in this spike; the real Phase 2 cost remains the line editor, exactly as §0.3 predicted — and that cost is identical under Ink, which provides no line editor either.
110 +
111 +One genuine positive finding for Ink 7 worth recording: it wraps every frame in DEC 2026 synchronized output and its input-to-write latency (p95 2 ms) comfortably meets the budget. If it did not retain settled content and did not hide the cursor, it would have been viable. Per §15.4, the losing candidate's adapter is to be deleted once the human terminal-matrix pass confirms criterion 1 and 5 for candidate A.
112 +
113 +---
114 +
115 +## 5. Artifacts
116 +
117 +| Path | Purpose |
118 +|---|---|
119 +| `candidate-a/main.ts` | Custom ANSI renderer + demo |
120 +| `candidate-b/main.tsx` | Ink 7 control + same demo |
121 +| `shared/demo.ts` | Shared mocked event script, composer model, settled-block scanner |
122 +| `shared/metrics.ts` | Shared instrumentation (latency, memory, ANSI-op audit) |
123 +| `shared/ansi.ts` | ANSI helpers (strip, width, wrap) |
124 +| `driver/run.ts` | pty measurement driver (`npm run measure:a` / `measure:b`, `DURATION_MS` env) |
125 +| `driver/debug-ink-input.tsx` | Diagnostic used to attribute the latency artifacts (§3.2) |
126 +| `out/summary-*.json`, `out/metrics-*.json`, `out/capture-*.txt` | Raw measurements and full pty captures |
127 +
128 +*Author: Simon-Pierre Boucher · contact@spboucher.ai*
added prototypes/tui-spike/candidate-a/main.ts +229 −0
@@ -0,0 +1,229 @@
1 +/**
2 + * KHAELOR
3 + * File: prototypes/tui-spike/candidate-a/main.ts
4 + * Description: Candidate A — minimal custom ANSI renderer (TUI_DESIGN §1): settled content printed
5 + * once to main-buffer scrollback; bounded live region repainted in place with per-row
6 + * damage tracking inside DEC 2026 synchronized frames; 16 ms coalesced repaints;
7 + * raw-mode input; SIGWINCH-driven full live repaint. Cursor parks at the composer caret.
8 + *
9 + * Author: Simon-Pierre Boucher
10 + * Contact: contact@spboucher.ai
11 + */
12 +
13 +import {
14 + CSI,
15 + HIDE_CURSOR,
16 + SHOW_CURSOR,
17 + SYNC_OFF,
18 + SYNC_ON,
19 + truncate,
20 + visibleWidth,
21 + wrapText,
22 +} from "../shared/ansi";
23 +import { DemoModel, STATUS_BAR, TAIL_CAP_LINES, decodeKeys } from "../shared/demo";
24 +import { SpikeMetrics, patchStdout } from "../shared/metrics";
25 +
26 +const out = process.stdout;
27 +const metrics = new SpikeMetrics("a-custom-ansi");
28 +const unpatch = patchStdout(out, metrics, () => cols());
29 +const model = new DemoModel();
30 +
31 +function cols(): number {
32 + return out.columns && out.columns > 0 ? out.columns : 80;
33 +}
34 +
35 +/* ---------------------------------------------------------------- renderer */
36 +
37 +class LiveRegion {
38 + private prev: string[] = [];
39 + private prevCaretRow = 0;
40 +
41 + /** Force the next frame to repaint every row (after resize or settled prints). */
42 + invalidate(): void {
43 + this.prev = [];
44 + }
45 +
46 + height(): number {
47 + return this.prev.length;
48 + }
49 +
50 + caretRow(): number {
51 + return this.prevCaretRow;
52 + }
53 +
54 + /**
55 + * One synchronized frame: optionally flush settled blocks to scrollback above the
56 + * live region, then repaint only the live rows that changed, then park the cursor
57 + * at the composer caret. Emitted as a single stream.write.
58 + */
59 + paint(lines: string[], caretRow: number, caretCol: number, settled: string[][]): void {
60 + let b = SYNC_ON + HIDE_CURSOR;
61 + // move from the parked caret to the top of the live region, column 1
62 + b += this.prevCaretRow > 0 ? `${CSI}${this.prevCaretRow}F` : "\r";
63 +
64 + if (settled.length > 0) {
65 + // erase the live region, print settled lines (they scroll away, immutable)
66 + b += `${CSI}0J`;
67 + for (const block of settled) {
68 + for (const line of block) b += truncateForWidth(line) + "\r\n";
69 + }
70 + this.prev = [];
71 + }
72 +
73 + const full = this.prev.length !== lines.length;
74 + if (full) metrics.framesFull++;
75 + else metrics.framesPartial++;
76 +
77 + const shrunk = this.prev.length > lines.length;
78 + for (let i = 0; i < lines.length; i++) {
79 + if (full || lines[i] !== this.prev[i]) {
80 + b += `${CSI}2K` + lines[i];
81 + metrics.linesRepainted++;
82 + }
83 + if (i < lines.length - 1) b += "\r\n";
84 + }
85 + if (shrunk) b += `${CSI}0J`;
86 +
87 + // park the cursor at the composer caret — unconditionally, every frame
88 + const up = lines.length - 1 - caretRow;
89 + if (up > 0) b += `${CSI}${up}A`;
90 + b += `${CSI}${caretCol + 1}G`;
91 + b += SHOW_CURSOR + SYNC_OFF;
92 +
93 + out.write(b);
94 + this.prev = lines;
95 + this.prevCaretRow = caretRow;
96 + }
97 +}
98 +
99 +function truncateForWidth(line: string): string {
100 + return truncate(line, cols() - 1);
101 +}
102 +
103 +function buildLive(): { lines: string[]; caretRow: number; caretCol: number } {
104 + const w = cols() - 1;
105 + const snap = model.snapshot();
106 + const lines: string[] = [];
107 +
108 + if (snap.tail.length > 0) {
109 + for (const l of wrapText(snap.tail, w).slice(-TAIL_CAP_LINES)) lines.push(l);
110 + lines.push("");
111 + }
112 + if (snap.status !== null) {
113 + const el = ((Date.now() - snap.status.since) / 1000).toFixed(1);
114 + lines.push(truncate(`● ${snap.status.text} · ${el}s`, w));
115 + lines.push("");
116 + }
117 + const caretRow = lines.length;
118 + const composerLine = truncate("❯ " + snap.composer, w);
119 + lines.push(composerLine);
120 + lines.push("\x1b[2m" + truncate(STATUS_BAR, w) + "\x1b[22m");
121 + return { lines, caretRow, caretCol: visibleWidth(composerLine) };
122 +}
123 +
124 +/* ------------------------------------------------------- frame coalescing */
125 +
126 +const live = new LiveRegion();
127 +const settledQueue: string[][] = [];
128 +let dirty = false;
129 +let flushTimer: NodeJS.Timeout | null = null;
130 +let lastFlush = 0;
131 +const FRAME_MS = 16;
132 +
133 +function markDirty(): void {
134 + dirty = true;
135 + if (flushTimer !== null) return;
136 + const wait = Math.max(0, FRAME_MS - (Date.now() - lastFlush));
137 + flushTimer = setTimeout(flush, wait);
138 +}
139 +
140 +function flush(): void {
141 + flushTimer = null;
142 + if (!dirty && settledQueue.length === 0) return;
143 + dirty = false;
144 + lastFlush = Date.now();
145 + const settled = settledQueue.splice(0);
146 + const { lines, caretRow, caretCol } = buildLive();
147 + live.paint(lines, caretRow, caretCol, settled);
148 +}
149 +
150 +/** Input priority (TUI_DESIGN §10.3): keystroke echo does not wait for the coalescing
151 + * window — the frame flushes immediately; stream deltas keep the 16 ms batch. */
152 +function flushNow(): void {
153 + if (flushTimer !== null) {
154 + clearTimeout(flushTimer);
155 + flushTimer = null;
156 + }
157 + flush();
158 +}
159 +
160 +/* ------------------------------------------------------------------ wiring */
161 +
162 +model.on("dirty", markDirty);
163 +model.on("settled", (block: string[]) => {
164 + settledQueue.push(block);
165 + markDirty();
166 +});
167 +
168 +// status-line elapsed timer tick
169 +const ticker = setInterval(() => {
170 + if (model.status !== null) markDirty();
171 +}, 100);
172 +ticker.unref();
173 +
174 +// resize: repaint the whole live region at the new width within one frame
175 +out.on("resize", () => {
176 + metrics.resizes++;
177 + live.invalidate();
178 + markDirty();
179 +});
180 +
181 +// raw-mode input — processed immediately, echoed in the next frame
182 +if (process.stdin.isTTY) process.stdin.setRawMode(true);
183 +process.stdin.resume();
184 +process.stdin.on("data", (buf: Buffer) => {
185 + const t = process.hrtime.bigint();
186 + for (const k of decodeKeys(buf)) {
187 + if (k.type === "esc" || k.type === "ctrlc") {
188 + shutdown();
189 + return;
190 + }
191 + model.handleKey(k);
192 + // Space keystrokes are excluded: terminal frameworks may trim trailing whitespace
193 + // at line ends, which would make a space-terminated needle unmatchable.
194 + if (k.type === "char" && k.ch !== " ")
195 + metrics.expectEcho(t, ("❯ " + model.composer).trimEnd());
196 + }
197 + flushNow();
198 +});
199 +
200 +let down = false;
201 +function shutdown(): void {
202 + if (down) return;
203 + down = true;
204 + model.stop();
205 + clearInterval(ticker);
206 + if (flushTimer !== null) clearTimeout(flushTimer);
207 + // leave the terminal clean: cursor below the live region, everything restored
208 + const below = live.height() - 1 - live.caretRow();
209 + out.write((below > 0 ? `${CSI}${below}B` : "") + "\r\n" + SHOW_CURSOR + SYNC_OFF);
210 + if (process.stdin.isTTY) process.stdin.setRawMode(false);
211 + process.stdin.pause();
212 + metrics.turns = model.turn;
213 + metrics.settledBlocks = model.settledCount;
214 + const file = metrics.save(process.env.METRICS_OUT);
215 + unpatch();
216 + out.write(`metrics written: ${file}\r\n`);
217 + process.exit(0);
218 +}
219 +
220 +process.on("SIGTERM", shutdown);
221 +process.on("SIGINT", shutdown);
222 +
223 +// headless fallback: self-terminate if the driver never sends Esc
224 +const durationMs = Number(process.env.DURATION_MS ?? 0);
225 +if (durationMs > 0) setTimeout(shutdown, durationMs + 4000).unref();
226 +
227 +metrics.startMem();
228 +model.start();
229 +markDirty();
added prototypes/tui-spike/candidate-b/main.tsx +157 −0
@@ -0,0 +1,157 @@
1 +/**
2 + * KHAELOR
3 + * File: prototypes/tui-spike/candidate-b/main.tsx
4 + * Description: Candidate B — Ink 7 control (TUI_DESIGN §15.1 candidate "Ink 7, strictly bounded"):
5 + * settled content through <Static> (written once), live region as a bounded dynamic
6 + * tree (streaming tail, status line, composer, status bar). Same shared demo model
7 + * and instrumentation as candidate A.
8 + *
9 + * Author: Simon-Pierre Boucher
10 + * Contact: contact@spboucher.ai
11 + */
12 +
13 +import fs from "node:fs";
14 +import React, { useEffect, useReducer, useState } from "react";
15 +import { Box, Static, Text, render, useApp, useInput } from "ink";
16 +import { DemoModel, STATUS_BAR, TAIL_CAP_LINES } from "../shared/demo";
17 +import { SpikeMetrics, patchStdout } from "../shared/metrics";
18 +
19 +const metrics = new SpikeMetrics("b-ink7");
20 +
21 +// temporary diagnostic: log every stdout write (time, length, composer presence)
22 +const writeLog: string[] = [];
23 +if (process.env.WRITE_LOG) {
24 + const t0 = Date.now();
25 + const orig = process.stdout.write.bind(process.stdout);
26 + (process.stdout as unknown as { write: unknown }).write = (chunk: unknown, ...rest: unknown[]) => {
27 + const s = typeof chunk === "string" ? chunk : Buffer.from(chunk as Uint8Array).toString("utf8");
28 + writeLog.push(
29 + `${Date.now() - t0} len=${s.length} composer=${s.includes("❯ ") ? "Y" : "n"} ${JSON.stringify(s.slice(0, 1200))}`,
30 + );
31 + return (orig as (c: unknown, ...r: unknown[]) => boolean)(chunk, ...rest);
32 + };
33 + process.on("exit", () => {
34 + fs.writeFileSync(process.env.WRITE_LOG!, writeLog.join("\n") + "\n");
35 + });
36 +}
37 +const unpatch = patchStdout(process.stdout, metrics, () =>
38 + process.stdout.columns && process.stdout.columns > 0 ? process.stdout.columns : 80,
39 +);
40 +const model = new DemoModel();
41 +
42 +// Record stdin arrival time before Ink's own parser sees the byte (listener order).
43 +const pendingTs: bigint[] = [];
44 +process.stdin.on("data", () => {
45 + pendingTs.push(process.hrtime.bigint());
46 + if (pendingTs.length > 128) pendingTs.shift();
47 +});
48 +
49 +interface SettledItem {
50 + id: number;
51 + text: string;
52 +}
53 +
54 +function App(): React.JSX.Element {
55 + const { exit } = useApp();
56 + const [settled, setSettled] = useState<SettledItem[]>([]);
57 + const [, force] = useReducer((x: number) => x + 1, 0);
58 +
59 + useEffect(() => {
60 + const onSettled = (lines: string[]) =>
61 + setSettled((s) => [...s, { id: s.length, text: lines.join("\n") }]);
62 + const onDirty = () => force();
63 + model.on("settled", onSettled);
64 + model.on("dirty", onDirty);
65 + const ticker = setInterval(() => {
66 + if (model.status !== null) force();
67 + }, 100);
68 + model.start();
69 + return () => {
70 + model.off("settled", onSettled);
71 + model.off("dirty", onDirty);
72 + clearInterval(ticker);
73 + };
74 + }, []);
75 +
76 + useInput((input, key) => {
77 + const ts = pendingTs.shift();
78 + if (key.escape) {
79 + exit();
80 + return;
81 + }
82 + if (key.return) {
83 + model.handleKey({ type: "enter" });
84 + return;
85 + }
86 + if (key.backspace || key.delete) {
87 + model.handleKey({ type: "backspace" });
88 + return;
89 + }
90 + if (input.length > 0) {
91 + // A lagging event loop can coalesce "\r" + following chars into one chunk that Ink
92 + // delivers as string input with key.return=false — treat embedded CR/LF as Enter,
93 + // exactly like candidate A's decodeKeys.
94 + for (const ch of input)
95 + model.handleKey(ch === "\r" || ch === "\n" ? { type: "enter" } : { type: "char", ch });
96 + // Space keystrokes are excluded: Ink/Yoga trims trailing whitespace at line ends,
97 + // which would make a space-terminated needle unmatchable (verified empirically).
98 + if (ts !== undefined && input.trim().length > 0)
99 + metrics.expectEcho(ts, ("❯ " + model.composer).trimEnd());
100 + }
101 + });
102 +
103 + const snap = model.snapshot();
104 + const tailLines = snap.tail.length > 0 ? snap.tail.split("\n").slice(-TAIL_CAP_LINES) : [];
105 + const elapsed =
106 + snap.status === null ? null : ((Date.now() - snap.status.since) / 1000).toFixed(1);
107 +
108 + return (
109 + <>
110 + <Static items={settled}>
111 + {(item) => (
112 + <Text key={item.id} wrap="wrap">
113 + {item.text}
114 + </Text>
115 + )}
116 + </Static>
117 + <Box flexDirection="column">
118 + {tailLines.length > 0 && (
119 + <>
120 + <Text wrap="wrap">{tailLines.join("\n")}</Text>
121 + <Text> </Text>
122 + </>
123 + )}
124 + {snap.status !== null && (
125 + <>
126 + <Text>{`● ${snap.status.text} · ${elapsed}s`}</Text>
127 + <Text> </Text>
128 + </>
129 + )}
130 + <Text wrap="truncate">{"❯ " + snap.composer}</Text>
131 + <Text dimColor wrap="truncate">
132 + {STATUS_BAR}
133 + </Text>
134 + </Box>
135 + </>
136 + );
137 +}
138 +
139 +process.stdout.on("resize", () => {
140 + metrics.resizes++;
141 +});
142 +
143 +const instance = render(<App />, { exitOnCtrlC: true, patchConsole: false });
144 +metrics.startMem();
145 +
146 +// headless fallback: self-terminate if the driver never sends Esc
147 +const durationMs = Number(process.env.DURATION_MS ?? 0);
148 +if (durationMs > 0) setTimeout(() => instance.unmount(), durationMs + 4000).unref();
149 +
150 +await instance.waitUntilExit();
151 +model.stop();
152 +metrics.turns = model.turn;
153 +metrics.settledBlocks = model.settledCount;
154 +const file = metrics.save(process.env.METRICS_OUT);
155 +unpatch();
156 +process.stdout.write(`metrics written: ${file}\n`);
157 +process.exit(0);
added prototypes/tui-spike/driver/debug-ink-input.tsx +90 −0
@@ -0,0 +1,90 @@
1 +/**
2 + * KHAELOR
3 + * File: prototypes/tui-spike/driver/debug-ink-input.tsx
4 + * Description: Diagnostic harness — traces stdin arrival vs Ink useInput delivery vs echo-frame
5 + * write time, to attribute candidate B's measured input latency (skew vs real stall).
6 + *
7 + * Author: Simon-Pierre Boucher
8 + * Contact: contact@spboucher.ai
9 + */
10 +
11 +import fs from "node:fs";
12 +import React, { useEffect, useReducer, useState } from "react";
13 +import { Box, Static, Text, render, useApp, useInput } from "ink";
14 +import { DemoModel } from "../shared/demo";
15 +
16 +const log: string[] = [];
17 +const t0 = process.hrtime.bigint();
18 +const ms = () => Number(process.hrtime.bigint() - t0) / 1e6;
19 +
20 +const model = new DemoModel();
21 +
22 +process.stdin.on("data", (b: Buffer) => {
23 + log.push(`${ms().toFixed(1)} DATA ${JSON.stringify(b.toString("utf8"))}`);
24 +});
25 +
26 +const origWrite = process.stdout.write.bind(process.stdout);
27 +let lastComposer = "";
28 +(process.stdout as unknown as { write: unknown }).write = (chunk: unknown, ...rest: unknown[]) => {
29 + const s = typeof chunk === "string" ? chunk : Buffer.from(chunk as Uint8Array).toString("utf8");
30 + if (lastComposer.length > 0 && s.includes("❯ " + lastComposer)) {
31 + log.push(`${ms().toFixed(1)} ECHO ${JSON.stringify(lastComposer.slice(-8))}`);
32 + lastComposer = "";
33 + }
34 + return (origWrite as (c: unknown, ...r: unknown[]) => boolean)(chunk, ...rest);
35 +};
36 +
37 +function App(): React.JSX.Element {
38 + const { exit } = useApp();
39 + const [settled, setSettled] = useState<{ id: number; text: string }[]>([]);
40 + const [, force] = useReducer((x: number) => x + 1, 0);
41 +
42 + useEffect(() => {
43 + model.on("settled", (lines: string[]) =>
44 + setSettled((s) => [...s, { id: s.length, text: lines.join("\n") }]),
45 + );
46 + model.on("dirty", () => force());
47 + const ticker = setInterval(() => {
48 + if (model.status !== null) force();
49 + }, 100);
50 + model.start();
51 + return () => clearInterval(ticker);
52 + }, []);
53 +
54 + useInput((input, key) => {
55 + log.push(
56 + `${ms().toFixed(1)} USEINPUT ${JSON.stringify(input)} esc=${key.escape} ret=${key.return}`,
57 + );
58 + if (key.escape) {
59 + exit();
60 + return;
61 + }
62 + if (key.return) {
63 + model.handleKey({ type: "enter" });
64 + log.push(`${ms().toFixed(1)} ENTER composer_now=${JSON.stringify(model.composer)}`);
65 + return;
66 + }
67 + for (const ch of input) model.handleKey({ type: "char", ch });
68 + lastComposer = model.composer;
69 + log.push(`${ms().toFixed(1)} COMPOSER ${JSON.stringify(model.composer.slice(-12))}`);
70 + });
71 +
72 + const snap = model.snapshot();
73 + const tail = snap.tail.length > 0 ? snap.tail.split("\n").slice(-12) : [];
74 + return (
75 + <>
76 + <Static items={settled}>{(i) => <Text key={i.id}>{i.text}</Text>}</Static>
77 + <Box flexDirection="column">
78 + {tail.length > 0 && <Text>{tail.join("\n")}</Text>}
79 + <Text>{"❯ " + snap.composer}</Text>
80 + </Box>
81 + </>
82 + );
83 +}
84 +
85 +const inst = render(<App />, { exitOnCtrlC: true, patchConsole: false });
86 +setTimeout(() => inst.unmount(), Number(process.env.DURATION_MS ?? 6000)).unref();
87 +await inst.waitUntilExit();
88 +model.stop();
89 +fs.writeFileSync(process.env.DEBUG_OUT ?? "out/debug-ink.log", log.join("\n") + "\n");
90 +process.exit(0);
added prototypes/tui-spike/driver/run.ts +116 −0
@@ -0,0 +1,116 @@
1 +/**
2 + * KHAELOR
3 + * File: prototypes/tui-spike/driver/run.ts
4 + * Description: Headless measurement driver — runs a candidate inside a real pty (node-pty),
5 + * injects synthetic typing at 30 cps during streaming, resizes the pty mid-stream,
6 + * sends Esc to end the run, then collects the candidate's in-process metrics and
7 + * performs settled-content integrity checks on the captured output.
8 + *
9 + * Author: Simon-Pierre Boucher
10 + * Contact: contact@spboucher.ai
11 + */
12 +
13 +import fs from "node:fs";
14 +import path from "node:path";
15 +import { fileURLToPath } from "node:url";
16 +import pty from "node-pty";
17 +import { stripAnsi } from "../shared/ansi";
18 +import { FENCE_TEXT } from "../shared/demo";
19 +
20 +const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "..");
21 +const cand = process.argv[2];
22 +if (cand !== "a" && cand !== "b") {
23 + console.error("usage: tsx driver/run.ts <a|b> (DURATION_MS env, default 60000)");
24 + process.exit(1);
25 +}
26 +const durationMs = Number(process.env.DURATION_MS ?? 60_000);
27 +const entry = cand === "a" ? "candidate-a/main.ts" : "candidate-b/main.tsx";
28 +const metricsOut = path.join(root, "out", `metrics-${cand}.json`);
29 +const capturePath = path.join(root, "out", `capture-${cand}.txt`);
30 +fs.mkdirSync(path.join(root, "out"), { recursive: true });
31 +if (fs.existsSync(metricsOut)) fs.unlinkSync(metricsOut);
32 +
33 +const p = pty.spawn(process.execPath, [path.join(root, "node_modules", "tsx", "dist", "cli.mjs"), entry], {
34 + name: "xterm-256color",
35 + cols: 100,
36 + rows: 30,
37 + cwd: root,
38 + env: { ...process.env, METRICS_OUT: metricsOut, DURATION_MS: String(durationMs), FORCE_COLOR: "1" },
39 +});
40 +
41 +let capture = "";
42 +p.onData((d) => {
43 + capture += d;
44 +});
45 +
46 +/* synthetic typing: 30 cps while the stream runs; Enter every 40 chars keeps the
47 + composer line short enough to survive the 60-column resize phase. */
48 +const phrase = "check the session store retry logic and rerun the tests then verify the journal ";
49 +let typed = 0;
50 +let typeTimer: NodeJS.Timeout | null = null;
51 +setTimeout(() => {
52 + typeTimer = setInterval(() => {
53 + if (typed > 0 && typed % 40 === 0) p.write("\r");
54 + p.write(phrase[typed % phrase.length]);
55 + typed++;
56 + }, 33);
57 +}, 1500);
58 +setTimeout(() => {
59 + if (typeTimer !== null) clearInterval(typeTimer);
60 +}, Math.max(2000, durationMs - 5000));
61 +
62 +/* resize the pty mid-stream (delivers a real SIGWINCH + winsize change to the child) */
63 +const resizePlan: Array<[number, number, number]> = [
64 + [0.33, 120, 30],
65 + [0.42, 60, 30],
66 + [0.5, 200, 45],
67 + [0.58, 100, 30],
68 +];
69 +for (const [frac, c, r] of resizePlan) {
70 + setTimeout(() => {
71 + try {
72 + p.resize(c, r);
73 + } catch {
74 + /* child may have exited */
75 + }
76 + }, Math.round(durationMs * frac));
77 +}
78 +
79 +/* end of run: Esc, then hard kill as a backstop */
80 +setTimeout(() => p.write("\x1b"), durationMs);
81 +const killer = setTimeout(() => p.kill(), durationMs + 8000);
82 +
83 +p.onExit(({ exitCode }) => {
84 + clearTimeout(killer);
85 + if (typeTimer !== null) clearInterval(typeTimer);
86 + fs.writeFileSync(capturePath, capture);
87 +
88 + const stripped = stripAnsi(capture).replace(/\r/g, "");
89 + const fenceIntact = stripped.includes(FENCE_TEXT);
90 + const fullClearsInCapture = (capture.match(/\x1b\[[23]J/g) ?? []).length;
91 +
92 + let metrics: unknown = null;
93 + try {
94 + metrics = JSON.parse(fs.readFileSync(metricsOut, "utf8"));
95 + } catch {
96 + console.error(`no metrics file at ${metricsOut} — child exit code ${exitCode}`);
97 + }
98 +
99 + const summary = {
100 + candidate: cand,
101 + childExitCode: exitCode,
102 + durationMs,
103 + typedChars: typed,
104 + driverChecks: {
105 + settledFenceBlockByteIdentical: fenceIntact,
106 + fullScreenClearsInCapture: fullClearsInCapture,
107 + captureBytes: capture.length,
108 + capturePath,
109 + },
110 + metrics,
111 + };
112 + const summaryPath = path.join(root, "out", `summary-${cand}.json`);
113 + fs.writeFileSync(summaryPath, JSON.stringify(summary, null, 2) + "\n");
114 + console.log(JSON.stringify(summary, null, 2));
115 + process.exit(0);
116 +});
added prototypes/tui-spike/out/capture-a.txt +9706 −0
@@ -0,0 +1,62008 @@
1 +[?2026h[?25l ● Reading src/session/store.ts · 0.0s
2 +
3 +❯
4 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l● Reading src/session/store.ts · 0.1s
5 +
6 +
7 +[?25h[?2026l[?2026h[?25l● Reading src/session/store.ts · 0.2s
8 +
9 +
10 +[?25h[?2026l[?2026h[?25l● Reading src/session/store.ts · 0.3s
11 +
12 +
13 +[?25h[?2026l[?2026h[?25l● Reading src/session/store.ts · 0.4s
14 +
15 +
16 +[?25h[?2026l[?2026h[?25l ▸ Read src/session/store.ts · 212 lines
17 +● Reading src/session/store.ts · 0.5s
18 +
19 +❯
20 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l● Reading src/session/store.ts · 0.6s
21 +
22 +
23 +[?25h[?2026l[?2026h[?25l● Reading src/session/store.ts · 0.7s
24 +
25 +
26 +[?25h[?2026l[?2026h[?25l ▸ Search "retry" · 6 matches
27 +● Thinking · 0.0s
28 +
29 +❯
30 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l● Thinking · 0.1s
31 +
32 +
33 +[?25h[?2026l[?2026h[?25l● Thinking · 0.2s
34 +
35 +
36 +[?25h[?2026l[?2026h[?25l● Thinking · 0.3s
37 +
38 +
39 +[?25h[?2026l[?2026h[?25l● Thinking · 0.4s
40 +
41 +
42 +[?25h[?2026l[?2026h[?25l## Sessi
43 +
44 +● Writing · 0.0s
45 +
46 +❯
47 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l## Session store
48 +
49 +
50 +
51 +
52 +[?25h[?2026l[?2026h[?25l
53 +
54 +● Writing · 0.1s
55 +
56 +
57 +[?25h[?2026l[?2026h[?25l## Session store retry l
58 +
59 +
60 +
61 +
62 +[?25h[?2026l[?2026h[?25l## Session store retry logic
63 +
64 +Th
65 +
66 +● Writing · 0.1s
67 +
68 +❯
69 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25lThe failur
70 +
71 +
72 +
73 +
74 +[?25h[?2026l[?2026h[?25l
75 +
76 +● Writing · 0.2s
77 +
78 +
79 +[?25h[?2026l[?2026h[?25lThe failure point
80 +
81 +
82 +
83 +
84 +[?25h[?2026l[?2026h[?25lThe failure point is in `S
85 +
86 +
87 +
88 +
89 +[?25h[?2026l[?2026h[?25l
90 +
91 +
92 +
93 +❯ c
94 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionSt
95 +
96 +
97 +
98 +
99 +[?25h[?2026l[?2026h[?25l
100 +
101 +● Writing · 0.3s
102 +
103 +❯ ch
104 +[?25h[?2026l[?2026h[?25l
105 +
106 +
107 +
108 +
109 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.appe
110 +
111 +
112 +
113 +
114 +[?25h[?2026l[?2026h[?25l
115 +
116 +
117 +
118 +❯ che
119 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.append` — jo
120 +
121 +
122 +
123 +
124 +[?25h[?2026l[?2026h[?25l
125 +
126 +
127 +
128 +❯ chec
129 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.append` — journal wr
130 +
131 +
132 +
133 +
134 +[?25h[?2026l[?2026h[?25l
135 +
136 +
137 +
138 +❯ check
139 +[?25h[?2026l[?2026h[?25l
140 +
141 +● Writing · 0.4s
142 +
143 +
144 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.append` — journal writes are
145 +
146 +
147 +
148 +
149 +[?25h[?2026l[?2026h[?25l
150 +
151 +
152 +
153 +❯ check
154 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.append` — journal writes are
155 +not ret
156 +
157 +● Writing · 0.4s
158 +
159 +❯ check
160 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
161 +
162 +
163 +
164 +
165 +❯ check t
166 +[?25h[?2026l[?2026h[?25l
167 +not retried on
168 +
169 +
170 +
171 +
172 +[?25h[?2026l[?2026h[?25l
173 +
174 +
175 +● Writing · 0.5s
176 +
177 +❯ check th
178 +[?25h[?2026l[?2026h[?25l
179 +
180 +
181 +
182 +
183 +
184 +[?25h[?2026l[?2026h[?25l
185 +not retried on transien
186 +
187 +
188 +
189 +
190 +[?25h[?2026l[?2026h[?25l
191 +
192 +
193 +
194 +
195 +❯ check the
196 +[?25h[?2026l[?2026h[?25l
197 +not retried on transient `EAGAI
198 +
199 +
200 +
201 +
202 +[?25h[?2026l[?2026h[?25l
203 +
204 +
205 +
206 +
207 +❯ check the
208 +[?25h[?2026l[?2026h[?25l
209 +not retried on transient `EAGAIN`, so a
210 +
211 +
212 +
213 +
214 +[?25h[?2026l[?2026h[?25l
215 +
216 +
217 +● Writing · 0.6s
218 +
219 +❯ check the s
220 +[?25h[?2026l[?2026h[?25l
221 +
222 +
223 +
224 +
225 +
226 +[?25h[?2026l[?2026h[?25l
227 +not retried on transient `EAGAIN`, so a busy fi
228 +
229 +
230 +
231 +
232 +[?25h[?2026l[?2026h[?25l
233 +
234 +
235 +
236 +
237 +❯ check the se
238 +[?25h[?2026l[?2026h[?25l
239 +not retried on transient `EAGAIN`, so a busy filesystem
240 +
241 +
242 +
243 +
244 +[?25h[?2026l[?2026h[?25l
245 +
246 +
247 +
248 +
249 +❯ check the ses
250 +[?25h[?2026l[?2026h[?25l
251 +not retried on transient `EAGAIN`, so a busy filesystem drops t
252 +
253 +
254 +
255 +
256 +[?25h[?2026l[?2026h[?25l
257 +
258 +
259 +● Writing · 0.7s
260 +
261 +❯ check the sess
262 +[?25h[?2026l[?2026h[?25l
263 +
264 +
265 +
266 +
267 +
268 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.append` — journal writes are
269 +not retried on transient `EAGAIN`, so a busy filesystem drops the
270 +event
271 +
272 +● Writing · 0.7s
273 +
274 +❯ check the sess
275 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
276 +
277 +
278 +
279 +
280 +
281 +❯ check the sessi
282 +[?25h[?2026l[?2026h[?25l
283 +
284 +event and the
285 +
286 +
287 +
288 +
289 +[?25h[?2026l[?2026h[?25l
290 +
291 +
292 +
293 +
294 +
295 +❯ check the sessio
296 +[?25h[?2026l[?2026h[?25l
297 +
298 +event and the session
299 +
300 +
301 +
302 +
303 +[?25h[?2026l[?2026h[?25l
304 +
305 +
306 +
307 +● Writing · 0.8s
308 +
309 +❯ check the session
310 +[?25h[?2026l[?2026h[?25l
311 +
312 +
313 +
314 +
315 +
316 +
317 +[?25h[?2026l[?2026h[?25l
318 +
319 +event and the session log div
320 +
321 +
322 +
323 +
324 +[?25h[?2026l[?2026h[?25l
325 +
326 +
327 +
328 +
329 +
330 +❯ check the session
331 +[?25h[?2026l[?2026h[?25l
332 +
333 +event and the session log diverges fr
334 +
335 +
336 +
337 +
338 +[?25h[?2026l[?2026h[?25l
339 +
340 +
341 +
342 +
343 +
344 +❯ check the session s
345 +[?25h[?2026l[?2026h[?25l
346 +
347 +event and the session log diverges from what
348 +
349 +● Writing · 0.9s
350 +
351 +
352 +[?25h[?2026l[?2026h[?25l
353 +
354 +
355 +
356 +
357 +
358 +❯ check the session st
359 +[?25h[?2026l[?2026h[?25l
360 +
361 +
362 +
363 +
364 +
365 +
366 +[?25h[?2026l[?2026h[?25l
367 +
368 +event and the session log diverges from what the user
369 +
370 +
371 +
372 +
373 +[?25h[?2026l[?2026h[?25l
374 +
375 +
376 +
377 +
378 +
379 +❯ check the session sto
380 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.append` — journal writes are
381 +not retried on transient `EAGAIN`, so a busy filesystem drops the
382 +event and the session log diverges from what the user saw on
383 +
384 +
385 +● Writing · 0.9s
386 +
387 +❯ check the session sto
388 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
389 +
390 +
391 +
392 +
393 +
394 +
395 +❯ check the session stor
396 +[?25h[?2026l[?2026h[?25l
397 +
398 +
399 +screen.
400 +
401 +● Writing · 1.0s
402 +
403 +
404 +[?25h[?2026l[?2026h[?25l
405 +
406 +
407 +
408 +
409 +
410 +
411 +❯ check the session store
412 +[?25h[?2026l[?2026h[?25l
413 +
414 +
415 +
416 +
417 +
418 +
419 +
420 +[?25h[?2026l[?2026h[?25l
421 +
422 +
423 +screen. The fix
424 +
425 +
426 +
427 +
428 +[?25h[?2026l[?2026h[?25l
429 +
430 +
431 +
432 +
433 +
434 +
435 +❯ check the session store
436 +[?25h[?2026l[?2026h[?25l
437 +
438 +
439 +screen. The fix wraps th
440 +
441 +
442 +
443 +
444 +[?25h[?2026l[?2026h[?25l
445 +
446 +
447 +
448 +
449 +
450 +
451 +❯ check the session store r
452 +[?25h[?2026l[?2026h[?25l
453 +
454 +
455 +screen. The fix wraps the journa
456 +
457 +● Writing · 1.1s
458 +
459 +
460 +[?25h[?2026l[?2026h[?25l
461 +
462 +
463 +
464 +
465 +
466 +
467 +❯ check the session store re
468 +[?25h[?2026l[?2026h[?25l
469 +
470 +
471 +
472 +
473 +
474 +
475 +
476 +[?25h[?2026l[?2026h[?25l
477 +
478 +
479 +screen. The fix wraps the journal write
480 +
481 +
482 +
483 +
484 +[?25h[?2026l[?2026h[?25l
485 +
486 +
487 +
488 +
489 +
490 +
491 +❯ check the session store ret
492 +[?25h[?2026l[?2026h[?25l
493 +
494 +
495 +screen. The fix wraps the journal write in a bou
496 +
497 +
498 +
499 +
500 +[?25h[?2026l[?2026h[?25l
501 +
502 +
503 +
504 +
505 +
506 +
507 +❯ check the session store retr
508 +[?25h[?2026l[?2026h[?25l
509 +
510 +
511 +screen. The fix wraps the journal write in a bounded ret
512 +
513 +● Writing · 1.2s
514 +
515 +
516 +[?25h[?2026l[?2026h[?25l
517 +
518 +
519 +
520 +
521 +
522 +
523 +❯ check the session store retry
524 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.append` — journal writes are
525 +not retried on transient `EAGAIN`, so a busy filesystem drops the
526 +event and the session log diverges from what the user saw on
527 +screen. The fix wraps the journal write in a bounded retry loop
528 +
529 +
530 +● Writing · 1.2s
531 +
532 +❯ check the session store retry
533 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
534 +
535 +
536 +
537 +
538 +
539 +
540 +
541 +❯ check the session store retry
542 +[?25h[?2026l[?2026h[?25l
543 +
544 +
545 +
546 +with exp
547 +
548 +
549 +
550 +
551 +[?25h[?2026l[?2026h[?25l
552 +
553 +
554 +
555 +
556 +
557 +
558 +
559 +❯ check the session store retry l
560 +[?25h[?2026l[?2026h[?25l
561 +
562 +
563 +
564 +with exponential
565 +
566 +● Writing · 1.3s
567 +
568 +
569 +[?25h[?2026l[?2026h[?25l
570 +
571 +
572 +
573 +
574 +
575 +
576 +
577 +❯ check the session store retry lo
578 +[?25h[?2026l[?2026h[?25l
579 +
580 +
581 +
582 +with exponential backoff
583 +
584 +
585 +
586 +
587 +[?25h[?2026l[?2026h[?25l
588 +
589 +
590 +
591 +
592 +
593 +
594 +
595 +❯ check the session store retry log
596 +[?25h[?2026l[?2026h[?25l
597 +
598 +
599 +
600 +with exponential backoff, and ke
601 +
602 +
603 +
604 +
605 +[?25h[?2026l[?2026h[?25l
606 +
607 +
608 +
609 +
610 +
611 +
612 +
613 +❯ check the session store retry logi
614 +[?25h[?2026l[?2026h[?25l
615 +
616 +
617 +
618 +with exponential backoff, and keeps the
619 +
620 +● Writing · 1.4s
621 +
622 +
623 +[?25h[?2026l[?2026h[?25l
624 +
625 +
626 +
627 +
628 +
629 +
630 +
631 +❯ check the session store retry logic
632 +[?25h[?2026l[?2026h[?25l
633 +
634 +
635 +
636 +with exponential backoff, and keeps the event lo
637 +
638 +
639 +
640 +
641 +[?25h[?2026l[?2026h[?25l
642 +
643 +
644 +
645 +
646 +
647 +
648 +
649 +❯ check the session store retry logic
650 +[?25h[?2026l[?2026h[?25l
651 +
652 +
653 +
654 +with exponential backoff, and keeps the event log append
655 +
656 +
657 +
658 +
659 +[?25h[?2026l[?2026h[?25l
660 +
661 +
662 +
663 +
664 +
665 +
666 +
667 +❯ check the session store retry logic a
668 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.append` — journal writes are
669 +not retried on transient `EAGAIN`, so a busy filesystem drops the
670 +event and the session log diverges from what the user saw on
671 +screen. The fix wraps the journal write in a bounded retry loop
672 +with exponential backoff, and keeps the event log append-only.
673 +
674 +● Writing · 1.5s
675 +
676 +❯ check the session store retry logic a
677 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
678 +
679 +❯ check the session store retry logic an
680 +[?25h[?2026l[?2026h[?25lKey chan
681 +
682 +● Writing · 1.5s
683 +
684 +❯ check the session store retry logic an
685 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
686 +
687 +
688 +
689 +❯ check the session store retry logic and
690 +[?25h[?2026l[?2026h[?25lKey changes:
691 +
692 +-
693 +
694 +● Writing · 1.5s
695 +
696 +❯ check the session store retry logic and
697 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
698 +
699 +
700 +
701 +❯ check the session store retry logic and
702 +[?25h[?2026l[?2026h[?25l- `append`
703 +
704 +● Writing · 1.6s
705 +
706 +
707 +[?25h[?2026l[?2026h[?25l
708 +❯ check the session store retry logic and
709 +
710 +- `append`
711 +
712 +● Writing · 1.6s
713 +
714 +❯
715 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
716 +
717 +
718 +
719 +❯ r
720 +[?25h[?2026l[?2026h[?25l- `append` now ret
721 +
722 +
723 +
724 +
725 +[?25h[?2026l[?2026h[?25l
726 +
727 +
728 +
729 +❯ re
730 +[?25h[?2026l[?2026h[?25l- `append` now retries up
731 +
732 +
733 +
734 +
735 +[?25h[?2026l[?2026h[?25l
736 +
737 +
738 +
739 +❯ rer
740 +[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 tim
741 +
742 +● Writing · 1.7s
743 +
744 +
745 +[?25h[?2026l[?2026h[?25l
746 +
747 +
748 +
749 +❯ reru
750 +[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 times on `E
751 +
752 +
753 +
754 +
755 +[?25h[?2026l[?2026h[?25l
756 +
757 +
758 +
759 +❯ rerun
760 +[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 times on `EAGAIN` /
761 +
762 +
763 +
764 +
765 +[?25h[?2026l[?2026h[?25l
766 +
767 +
768 +
769 +❯ rerun
770 +[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 times on `EAGAIN` / `EBUSY`
771 +
772 +● Writing · 1.8s
773 +
774 +
775 +[?25h[?2026l[?2026h[?25l
776 +
777 +
778 +
779 +❯ rerun t
780 +[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 times on `EAGAIN` / `EBUSY`
781 +- backo
782 +
783 +● Writing · 1.8s
784 +
785 +❯ rerun t
786 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
787 +
788 +
789 +
790 +
791 +❯ rerun th
792 +[?25h[?2026l[?2026h[?25l
793 +- backoff is 2
794 +
795 +
796 +
797 +
798 +[?25h[?2026l[?2026h[?25l
799 +
800 +
801 +
802 +
803 +❯ rerun the
804 +[?25h[?2026l[?2026h[?25l
805 +- backoff is 2 ms, 8 ms
806 +
807 +● Writing · 1.9s
808 +
809 +
810 +[?25h[?2026l[?2026h[?25l
811 +
812 +
813 +
814 +
815 +❯ rerun the
816 +[?25h[?2026l[?2026h[?25l
817 +- backoff is 2 ms, 8 ms, 32 ms
818 +
819 +
820 +
821 +
822 +[?25h[?2026l[?2026h[?25l
823 +
824 +
825 +
826 +
827 +❯ rerun the t
828 +[?25h[?2026l[?2026h[?25l
829 +- backoff is 2 ms, 8 ms, 32 ms — bounde
830 +
831 +
832 +
833 +
834 +[?25h[?2026l[?2026h[?25l
835 +
836 +
837 +
838 +
839 +❯ rerun the te
840 +[?25h[?2026l[?2026h[?25l
841 +- backoff is 2 ms, 8 ms, 32 ms — bounded, never
842 +
843 +● Writing · 2.0s
844 +
845 +
846 +[?25h[?2026l[?2026h[?25l
847 +
848 +
849 +
850 +
851 +❯ rerun the tes
852 +[?25h[?2026l[?2026h[?25l
853 +- backoff is 2 ms, 8 ms, 32 ms — bounded, never user-vi
854 +
855 +
856 +
857 +
858 +[?25h[?2026l[?2026h[?25l
859 +
860 +
861 +
862 +
863 +❯ rerun the test
864 +[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 times on `EAGAIN` / `EBUSY`
865 +- backoff is 2 ms, 8 ms, 32 ms — bounded, never user-visible
866 +-
867 +
868 +● Writing · 2.0s
869 +
870 +❯ rerun the test
871 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
872 +
873 +
874 +
875 +
876 +
877 +❯ rerun the tests
878 +[?25h[?2026l[?2026h[?25l
879 +
880 +- a `Write
881 +
882 +● Writing · 2.1s
883 +
884 +
885 +[?25h[?2026l[?2026h[?25l
886 +
887 +
888 +
889 +
890 +
891 +❯ rerun the tests
892 +[?25h[?2026l[?2026h[?25l
893 +
894 +- a `WriteFailed`
895 +
896 +
897 +
898 +❯ rerun the tests t
899 +[?25h[?2026l[?2026h[?25l
900 +
901 +- a `WriteFailed` event is
902 +
903 +
904 +
905 +❯ rerun the tests th
906 +[?25h[?2026l[?2026h[?25l
907 +
908 +
909 +
910 +● Writing · 2.2s
911 +
912 +
913 +[?25h[?2026l[?2026h[?25l
914 +
915 +- a `WriteFailed` event is emitted
916 +
917 +
918 +
919 +❯ rerun the tests the
920 +[?25h[?2026l[?2026h[?25l
921 +
922 +- a `WriteFailed` event is emitted only af
923 +
924 +
925 +
926 +❯ rerun the tests then
927 +[?25h[?2026l[?2026h[?25l
928 +
929 +
930 +
931 +
932 +
933 +❯ rerun the tests then
934 +[?25h[?2026l[?2026h[?25l
935 +
936 +- a `WriteFailed` event is emitted only after the
937 +
938 +● Writing · 2.3s
939 +
940 +
941 +[?25h[?2026l[?2026h[?25l
942 +
943 +- a `WriteFailed` event is emitted only after the final at
944 +
945 +
946 +
947 +
948 +[?25h[?2026l[?2026h[?25l
949 +
950 +
951 +
952 +
953 +
954 +❯ rerun the tests then v
955 +[?25h[?2026l[?2026h[?25l
956 +
957 +
958 +
959 +
960 +
961 +❯ rerun the tests then ve
962 +[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 times on `EAGAIN` / `EBUSY`
963 +- backoff is 2 ms, 8 ms, 32 ms — bounded, never user-visible
964 +- a `WriteFailed` event is emitted only after the final attempt
965 +-
966 +
967 +● Writing · 2.3s
968 +
969 +❯ rerun the tests then ve
970 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
971 +
972 +
973 +
974 +
975 +
976 +
977 +❯ rerun the tests then ver
978 +[?25h[?2026l[?2026h[?25l
979 +
980 +
981 +- no parti
982 +
983 +● Writing · 2.4s
984 +
985 +
986 +[?25h[?2026l[?2026h[?25l
987 +
988 +
989 +- no partial frame
990 +
991 +
992 +
993 +❯ rerun the tests then veri
994 +[?25h[?2026l[?2026h[?25l
995 +
996 +
997 +- no partial frames are ev
998 +
999 +
1000 +
1001 +❯ rerun the tests then verif
1002 +[?25h[?2026l[?2026h[?25l
1003 +
1004 +
1005 +- no partial frames are ever kept
1006 +
1007 +
1008 +
1009 +❯ rerun the tests then verify
1010 +[?25h[?2026l[?2026h[?25l
1011 +
1012 +
1013 +
1014 +
1015 +● Writing · 2.5s
1016 +
1017 +
1018 +[?25h[?2026l[?2026h[?25l
1019 +
1020 +
1021 +- no partial frames are ever kept in the j
1022 +
1023 +
1024 +
1025 +❯ rerun the tests then verify
1026 +[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 times on `EAGAIN` / `EBUSY`
1027 +- backoff is 2 ms, 8 ms, 32 ms — bounded, never user-visible
1028 +- a `WriteFailed` event is emitted only after the final attempt
1029 +- no partial frames are ever kept in the journal
1030 +
1031 +● Writing · 2.5s
1032 +
1033 +❯ rerun the tests then verify t
1034 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l```ts
1035 +as
1036 +
1037 +● Writing · 2.5s
1038 +
1039 +❯ rerun the tests then verify th
1040 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
1041 +async appe
1042 +
1043 +● Writing · 2.6s
1044 +
1045 +
1046 +[?25h[?2026l[?2026h[?25l
1047 +
1048 +
1049 +
1050 +
1051 +❯ rerun the tests then verify the
1052 +[?25h[?2026l[?2026h[?25l
1053 +async append(event
1054 +
1055 +
1056 +
1057 +❯ rerun the tests then verify the
1058 +[?25h[?2026l[?2026h[?25l
1059 +async append(event: Sessio
1060 +
1061 +
1062 +
1063 +❯ rerun the tests then verify the j
1064 +[?25h[?2026l[?2026h[?25l
1065 +async append(event: SessionEvent):
1066 +
1067 +● Writing · 2.7s
1068 +
1069 +
1070 +[?25h[?2026l[?2026h[?25l
1071 +
1072 +
1073 +
1074 +
1075 +❯ rerun the tests then verify the jo
1076 +[?25h[?2026l[?2026h[?25l
1077 +async append(event: SessionEvent): Promise
1078 +
1079 +
1080 +
1081 +
1082 +[?25h[?2026l[?2026h[?25l
1083 +
1084 +
1085 +
1086 +
1087 +❯ rerun the tests then verify the jou
1088 +[?25h[?2026l[?2026h[?25l
1089 +async append(event: SessionEvent): Promise<void> {
1090 +
1091 +
1092 +
1093 +❯ rerun the tests then verify the jour
1094 +[?25h[?2026l[?2026h[?25l```ts
1095 +async append(event: SessionEvent): Promise<void> {
1096 + for (
1097 +
1098 +● Writing · 2.8s
1099 +
1100 +❯ rerun the tests then verify the jour
1101 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
1102 +
1103 +
1104 +
1105 +
1106 +
1107 +❯ rerun the tests then verify the journ
1108 +[?25h[?2026l[?2026h[?25l
1109 +
1110 +
1111 +
1112 +
1113 +
1114 +❯ rerun the tests then verify the journa
1115 +[?25h[?2026l[?2026h[?25l
1116 +
1117 + for (let atte
1118 +
1119 +
1120 +
1121 +
1122 +[?25h[?2026l[?2026h[?25l
1123 +
1124 +
1125 +
1126 +
1127 +
1128 +❯ rerun the tests then verify the journal
1129 +[?25h[?2026l[?2026h[?25l
1130 +
1131 + for (let attempt = 0;
1132 +
1133 +● Writing · 2.9s
1134 +
1135 +
1136 +[?25h[?2026l[?2026h[?25l
1137 +
1138 +
1139 +
1140 +
1141 +
1142 +❯ rerun the tests then verify the journal
1143 +[?25h[?2026l[?2026h[?25l
1144 +
1145 + for (let attempt = 0; attempt
1146 +
1147 +
1148 +
1149 +
1150 +[?25h[?2026l[?2026h[?25l
1151 +❯ rerun the tests then verify the journal
1152 +
1153 +```ts
1154 +async append(event: SessionEvent): Promise<void> {
1155 + for (let attempt = 0; attempt
1156 +
1157 +● Writing · 2.9s
1158 +
1159 +❯
1160 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
1161 +
1162 + for (let attempt = 0; attempt < 3; at
1163 +
1164 +
1165 +
1166 +❯ c
1167 +[?25h[?2026l[?2026h[?25l
1168 +
1169 + for (let attempt = 0; attempt < 3; attempt++)
1170 +
1171 +
1172 +
1173 +❯ ch
1174 +[?25h[?2026l[?2026h[?25l
1175 +
1176 +
1177 +
1178 +● Writing · 3.0s
1179 +
1180 +
1181 +[?25h[?2026l[?2026h[?25l```ts
1182 +async append(event: SessionEvent): Promise<void> {
1183 + for (let attempt = 0; attempt < 3; attempt++) {
1184 + t
1185 +
1186 +● Writing · 3.0s
1187 +
1188 +❯ che
1189 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l```ts
1190 +async append(event: SessionEvent): Promise<void> {
1191 + for (let attempt = 0; attempt < 3; attempt++) {
1192 + try {
1193 +
1194 +
1195 +● Writing · 3.0s
1196 +
1197 +❯ chec
1198 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
1199 +
1200 +
1201 +
1202 +
1203 +
1204 +
1205 +
1206 +❯ check
1207 +[?25h[?2026l[?2026h[?25l
1208 +
1209 +
1210 +
1211 + await
1212 +
1213 +● Writing · 3.1s
1214 +
1215 +
1216 +[?25h[?2026l[?2026h[?25l
1217 +
1218 +
1219 +
1220 +
1221 +
1222 +
1223 +
1224 +❯ check
1225 +[?25h[?2026l[?2026h[?25l
1226 +
1227 +
1228 +
1229 + await this.jo
1230 +
1231 +
1232 +
1233 +
1234 +[?25h[?2026l[?2026h[?25l
1235 +
1236 +
1237 +
1238 +
1239 +
1240 +
1241 +
1242 +❯ check t
1243 +[?25h[?2026l[?2026h[?25l
1244 +
1245 +
1246 +
1247 + await this.journal.wr
1248 +
1249 +
1250 +
1251 +
1252 +[?25h[?2026l[?2026h[?25l
1253 +
1254 +
1255 +
1256 +
1257 +
1258 +
1259 +
1260 +❯ check th
1261 +[?25h[?2026l[?2026h[?25l
1262 +
1263 +
1264 +
1265 + await this.journal.write(enco
1266 +
1267 +● Writing · 3.2s
1268 +
1269 +
1270 +[?25h[?2026l[?2026h[?25l
1271 +
1272 +
1273 +
1274 + await this.journal.write(encode(event
1275 +
1276 +
1277 +
1278 +❯ check the
1279 +[?25h[?2026l[?2026h[?25l```ts
1280 +async append(event: SessionEvent): Promise<void> {
1281 + for (let attempt = 0; attempt < 3; attempt++) {
1282 + try {
1283 + await this.journal.write(encode(event));
1284 +
1285 +
1286 +● Writing · 3.2s
1287 +
1288 +❯ check the
1289 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
1290 +
1291 +
1292 +
1293 +
1294 +
1295 +
1296 +
1297 +
1298 +❯ check the s
1299 +[?25h[?2026l[?2026h[?25l
1300 +
1301 +
1302 +
1303 +
1304 + return
1305 +
1306 +● Writing · 3.3s
1307 +
1308 +
1309 +[?25h[?2026l[?2026h[?25l
1310 +
1311 +
1312 +
1313 +
1314 +
1315 +
1316 +
1317 +
1318 +
1319 +[?25h[?2026l[?2026h[?25l```ts
1320 +async append(event: SessionEvent): Promise<void> {
1321 + for (let attempt = 0; attempt < 3; attempt++) {
1322 + try {
1323 + await this.journal.write(encode(event));
1324 + return;
1325 + }
1326 +
1327 +● Writing · 3.3s
1328 +
1329 +❯ check the se
1330 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
1331 +
1332 +
1333 +
1334 +
1335 +
1336 + } catch (e
1337 +
1338 +
1339 +
1340 +❯ check the ses
1341 +[?25h[?2026l[?2026h[?25l```ts
1342 +async append(event: SessionEvent): Promise<void> {
1343 + for (let attempt = 0; attempt < 3; attempt++) {
1344 + try {
1345 + await this.journal.write(encode(event));
1346 + return;
1347 + } catch (err) {
1348 +
1349 +
1350 +● Writing · 3.4s
1351 +
1352 +❯ check the ses
1353 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
1354 +
1355 +
1356 +
1357 +
1358 +
1359 +
1360 +
1361 +
1362 +
1363 +
1364 +❯ check the sess
1365 +[?25h[?2026l[?2026h[?25l
1366 +
1367 +
1368 +
1369 +
1370 +
1371 +
1372 +
1373 +
1374 +
1375 +
1376 +
1377 +[?25h[?2026l[?2026h[?25l
1378 +
1379 +
1380 +
1381 +
1382 +
1383 +
1384 + if (
1385 +
1386 +
1387 +
1388 +❯ check the sessi
1389 +[?25h[?2026l[?2026h[?25l
1390 +
1391 +
1392 +
1393 +
1394 +
1395 +
1396 + if (!isTrans
1397 +
1398 +
1399 +
1400 +❯ check the sessio
1401 +[?25h[?2026l[?2026h[?25l
1402 +
1403 +
1404 +
1405 +
1406 +
1407 +
1408 + if (!isTransient(err
1409 +
1410 +● Writing · 3.5s
1411 +
1412 +❯ check the session
1413 +[?25h[?2026l[?2026h[?25l
1414 +
1415 +
1416 +
1417 +
1418 +
1419 +
1420 +
1421 +
1422 +
1423 +
1424 +
1425 +[?25h[?2026l[?2026h[?25l
1426 +
1427 +
1428 +
1429 +
1430 +
1431 +
1432 + if (!isTransient(err)) throw
1433 +
1434 +
1435 +
1436 +❯ check the session
1437 +[?25h[?2026l[?2026h[?25l```ts
1438 +async append(event: SessionEvent): Promise<void> {
1439 + for (let attempt = 0; attempt < 3; attempt++) {
1440 + try {
1441 + await this.journal.write(encode(event));
1442 + return;
1443 + } catch (err) {
1444 + if (!isTransient(err)) throw err;
1445 +
1446 +
1447 +● Writing · 3.5s
1448 +
1449 +❯ check the session s
1450 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
1451 +
1452 +
1453 +
1454 +
1455 +
1456 +
1457 +
1458 + awai
1459 +
1460 +● Writing · 3.6s
1461 +
1462 +
1463 +[?25h[?2026l[?2026h[?25l
1464 +
1465 +
1466 +
1467 +
1468 +
1469 +
1470 +
1471 +
1472 +
1473 +
1474 +
1475 +❯ check the session st
1476 +[?25h[?2026l[?2026h[?25l
1477 +
1478 +
1479 +
1480 +
1481 +
1482 +
1483 +
1484 +
1485 +
1486 +
1487 +
1488 +
1489 +[?25h[?2026l[?2026h[?25l
1490 +
1491 +
1492 +
1493 +
1494 +
1495 +
1496 +
1497 + await delay(
1498 +
1499 +
1500 +
1501 +❯ check the session sto
1502 +[?25h[?2026l[?2026h[?25l
1503 +
1504 +
1505 +
1506 +
1507 +
1508 +
1509 +
1510 + await delay(2 ** (2
1511 +
1512 +
1513 +
1514 +❯ check the session stor
1515 +[?25h[?2026l[?2026h[?25l
1516 +
1517 +
1518 +
1519 +
1520 +
1521 +
1522 +
1523 + await delay(2 ** (2 * attemp
1524 +
1525 +● Writing · 3.7s
1526 +
1527 +
1528 +[?25h[?2026l[?2026h[?25l
1529 +
1530 +
1531 +
1532 +
1533 +
1534 +
1535 +
1536 +
1537 +
1538 +
1539 +
1540 +❯ check the session store
1541 +[?25h[?2026l[?2026h[?25l
1542 +
1543 +
1544 +
1545 +
1546 +
1547 +
1548 +
1549 +
1550 +
1551 +
1552 +
1553 +
1554 +[?25h[?2026l[?2026h[?25l
1555 +
1556 +
1557 +
1558 +
1559 +
1560 +
1561 +
1562 + await delay(2 ** (2 * attempt + 1));
1563 +
1564 +
1565 +
1566 +❯ check the session store
1567 +[?25h[?2026l[?2026h[?25l```ts
1568 +async append(event: SessionEvent): Promise<void> {
1569 + for (let attempt = 0; attempt < 3; attempt++) {
1570 + try {
1571 + await this.journal.write(encode(event));
1572 + return;
1573 + } catch (err) {
1574 + if (!isTransient(err)) throw err;
1575 + await delay(2 ** (2 * attempt + 1));
1576 + }
1577 +
1578 +
1579 +● Writing · 3.7s
1580 +
1581 +❯ check the session store r
1582 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l```ts
1583 +async append(event: SessionEvent): Promise<void> {
1584 + for (let attempt = 0; attempt < 3; attempt++) {
1585 + try {
1586 + await this.journal.write(encode(event));
1587 + return;
1588 + } catch (err) {
1589 + if (!isTransient(err)) throw err;
1590 + await delay(2 ** (2 * attempt + 1));
1591 + }
1592 + }
1593 + thi
1594 +
1595 +● Writing · 3.8s
1596 +
1597 +❯ check the session store re
1598 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
1599 +
1600 +
1601 +
1602 +
1603 +
1604 +
1605 +
1606 +
1607 +
1608 +
1609 +
1610 +
1611 +
1612 +
1613 +
1614 +[?25h[?2026l[?2026h[?25l
1615 +
1616 +
1617 +
1618 +
1619 +
1620 +
1621 +
1622 +
1623 +
1624 +
1625 +
1626 +
1627 +
1628 +
1629 +❯ check the session store ret
1630 +[?25h[?2026l[?2026h[?25l
1631 +
1632 +
1633 +
1634 +
1635 +
1636 +
1637 +
1638 +
1639 +
1640 +
1641 + this.bus.em
1642 +
1643 +
1644 +
1645 +
1646 +[?25h[?2026l[?2026h[?25l
1647 +
1648 +
1649 +
1650 +
1651 +
1652 +
1653 +
1654 +
1655 +
1656 +
1657 +
1658 +
1659 +
1660 +
1661 +❯ check the session store retr
1662 +[?25h[?2026l[?2026h[?25l
1663 +
1664 +
1665 +
1666 +
1667 +
1668 +
1669 +
1670 +
1671 +
1672 +
1673 + this.bus.emit({ typ
1674 +
1675 +
1676 +
1677 +
1678 +[?25h[?2026l[?2026h[?25l
1679 +
1680 +
1681 +
1682 +
1683 +
1684 +
1685 +
1686 +
1687 +
1688 +
1689 + this.bus.emit({ type: 'Writ
1690 +
1691 +● Writing · 3.9s
1692 +
1693 +
1694 +[?25h[?2026l[?2026h[?25l
1695 +
1696 +
1697 +
1698 +
1699 +
1700 +
1701 +
1702 +
1703 +
1704 +
1705 +
1706 +
1707 +
1708 +
1709 +❯ check the session store retry
1710 +[?25h[?2026l[?2026h[?25l
1711 +
1712 +
1713 +
1714 +
1715 +
1716 +
1717 +
1718 +
1719 +
1720 +
1721 + this.bus.emit({ type: 'WriteFailed'
1722 +
1723 +
1724 +
1725 +
1726 +[?25h[?2026l[?2026h[?25l
1727 +
1728 +
1729 +
1730 +
1731 +
1732 +
1733 +
1734 +
1735 +
1736 +
1737 +
1738 +
1739 +
1740 +
1741 +❯ check the session store retry
1742 +[?25h[?2026l[?2026h[?25l
1743 +
1744 +
1745 +
1746 +
1747 +
1748 +
1749 +
1750 +
1751 +
1752 +
1753 + this.bus.emit({ type: 'WriteFailed', event
1754 +
1755 +
1756 +
1757 +
1758 +[?25h[?2026l[?2026h[?25l
1759 +
1760 +
1761 +
1762 +
1763 +
1764 +
1765 +
1766 +
1767 +
1768 +
1769 +
1770 +
1771 +
1772 +
1773 +❯ check the session store retry l
1774 +[?25h[?2026l[?2026h[?25l for (let attempt = 0; attempt < 3; attempt++) {
1775 + try {
1776 + await this.journal.write(encode(event));
1777 + return;
1778 + } catch (err) {
1779 + if (!isTransient(err)) throw err;
1780 + await delay(2 ** (2 * attempt + 1));
1781 + }
1782 + }
1783 + this.bus.emit({ type: 'WriteFailed', event });
1784 +}
1785 +``
1786 +
1787 +● Writing · 4.0s
1788 +
1789 +
1790 +[?25h[?2026l[?2026h[?25l
1791 +
1792 +
1793 +
1794 +
1795 +
1796 +
1797 +
1798 +
1799 +
1800 +
1801 +
1802 +
1803 +
1804 +
1805 +❯ check the session store retry lo
1806 +[?25h[?2026l[?2026h[?25l```ts
1807 +async append(event: SessionEvent): Promise<void> {
1808 + for (let attempt = 0; attempt < 3; attempt++) {
1809 + try {
1810 + await this.journal.write(encode(event));
1811 + return;
1812 + } catch (err) {
1813 + if (!isTransient(err)) throw err;
1814 + await delay(2 ** (2 * attempt + 1));
1815 + }
1816 + }
1817 + this.bus.emit({ type: 'WriteFailed', event });
1818 +}
1819 +```
1820 +
1821 +The r
1822 +
1823 +● Writing · 4.0s
1824 +
1825 +❯ check the session store retry lo
1826 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
1827 +
1828 +
1829 +
1830 +❯ check the session store retry log
1831 +[?25h[?2026l[?2026h[?25lThe retry loo
1832 +
1833 +
1834 +
1835 +
1836 +[?25h[?2026l[?2026h[?25l
1837 +
1838 +
1839 +
1840 +❯ check the session store retry logi
1841 +[?25h[?2026l[?2026h[?25l ▸ Edit src/context/engine.ts · +31 −12
1842 +The retry loop is del
1843 +
1844 +● Editing src/context/engine.ts · 0.0s
1845 +
1846 +❯ check the session store retry logi
1847 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
1848 +
1849 +
1850 +
1851 +❯ check the session store retry logic
1852 +[?25h[?2026l[?2026h[?25lThe retry loop is deliberatel
1853 +
1854 +
1855 +
1856 +
1857 +[?25h[?2026l[?2026h[?25l
1858 +
1859 +
1860 +
1861 +❯ check the session store retry logic
1862 +[?25h[?2026l[?2026h[?25lThe retry loop is deliberately synchr
1863 +
1864 +● Editing src/context/engine.ts · 0.1s
1865 +
1866 +
1867 +[?25h[?2026l[?2026h[?25l
1868 +
1869 +
1870 +
1871 +❯ check the session store retry logic a
1872 +[?25h[?2026l[?2026h[?25lThe retry loop is deliberately synchronous wi
1873 +
1874 +
1875 +
1876 +
1877 +[?25h[?2026l[?2026h[?25l
1878 +
1879 +
1880 +
1881 +❯ check the session store retry logic an
1882 +[?25h[?2026l[?2026h[?25lThe retry loop is deliberately synchronous with the e
1883 +
1884 +
1885 +
1886 +
1887 +[?25h[?2026l[?2026h[?25l
1888 +
1889 +
1890 +
1891 +❯ check the session store retry logic and
1892 +[?25h[?2026l[?2026h[?25lThe retry loop is deliberately synchronous with the event bus
1893 +
1894 +● Editing src/context/engine.ts · 0.2s
1895 +
1896 +
1897 +[?25h[?2026l[?2026h[?25l
1898 +
1899 +
1900 +
1901 +❯ check the session store retry logic and
1902 +[?25h[?2026l[?2026h[?25lThe retry loop is deliberately synchronous with the event bus:
1903 +observ
1904 +
1905 +● Editing src/context/engine.ts · 0.2s
1906 +
1907 +❯ check the session store retry logic and
1908 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
1909 +❯ check the session store retry logic and
1910 +
1911 +The retry loop is deliberately synchronous with the event bus:
1912 +observ
1913 +
1914 +● Editing src/context/engine.ts · 0.2s
1915 +
1916 +❯
1917 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
1918 +
1919 +
1920 +
1921 +
1922 +❯ r
1923 +[?25h[?2026l[?2026h[?25l
1924 +observations s
1925 +
1926 +
1927 +
1928 +
1929 +[?25h[?2026l[?2026h[?25l
1930 +
1931 +
1932 +
1933 +
1934 +❯ re
1935 +[?25h[?2026l[?2026h[?25l
1936 +observations settle in
1937 +
1938 +● Editing src/context/engine.ts · 0.3s
1939 +
1940 +❯ rer
1941 +[?25h[?2026l[?2026h[?25l
1942 +observations settle in order,
1943 +
1944 +
1945 +
1946 +❯ reru
1947 +[?25h[?2026l[?2026h[?25l
1948 +observations settle in order, and the
1949 +
1950 +
1951 +
1952 +❯ rerun
1953 +[?25h[?2026l[?2026h[?25l
1954 +observations settle in order, and the live reg
1955 +
1956 +● Editing src/context/engine.ts · 0.4s
1957 +
1958 +❯ rerun
1959 +[?25h[?2026l[?2026h[?25l
1960 +observations settle in order, and the live region neve
1961 +
1962 +
1963 +
1964 +❯ rerun t
1965 +[?25h[?2026l[?2026h[?25l
1966 +observations settle in order, and the live region never shows
1967 +
1968 +
1969 +
1970 +❯ rerun th
1971 +[?25h[?2026l[?2026h[?25lThe retry loop is deliberately synchronous with the event bus:
1972 +observations settle in order, and the live region never shows a
1973 +frame
1974 +
1975 +● Editing src/context/engine.ts · 0.5s
1976 +
1977 +❯ rerun the
1978 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
1979 +
1980 +frame that the
1981 +
1982 +
1983 +
1984 +❯ rerun the
1985 +[?25h[?2026l[?2026h[?25l
1986 +
1987 +
1988 +
1989 +
1990 +
1991 +❯ rerun the t
1992 +[?25h[?2026l[?2026h[?25l
1993 +
1994 +frame that the journal
1995 +
1996 +● Editing src/context/engine.ts · 0.6s
1997 +
1998 +
1999 +[?25h[?2026l[?2026h[?25l
2000 +
2001 +
2002 +
2003 +
2004 +
2005 +❯ rerun the te
2006 +[?25h[?2026l[?2026h[?25l
2007 +
2008 +frame that the journal has not
2009 +
2010 +
2011 +
2012 +
2013 +[?25h[?2026l[?2026h[?25l
2014 +
2015 +
2016 +
2017 +
2018 +
2019 +❯ rerun the tes
2020 +[?25h[?2026l[?2026h[?25l
2021 +
2022 +frame that the journal has not accepte
2023 +
2024 +
2025 +
2026 +
2027 +[?25h[?2026l[?2026h[?25l
2028 +
2029 +
2030 +
2031 +
2032 +
2033 +
2034 +[?25h[?2026l[?2026h[?25l
2035 +
2036 +frame that the journal has not accepted. Inter
2037 +
2038 +
2039 +
2040 +❯ rerun the test
2041 +[?25h[?2026l[?2026h[?25l
2042 +
2043 +frame that the journal has not accepted. Interruption
2044 +
2045 +● Editing src/context/engine.ts · 0.7s
2046 +
2047 +
2048 +[?25h[?2026l[?2026h[?25l
2049 +
2050 +
2051 +
2052 +
2053 +
2054 +❯ rerun the tests
2055 +[?25h[?2026l[?2026h[?25lThe retry loop is deliberately synchronous with the event bus:
2056 +observations settle in order, and the live region never shows a
2057 +frame that the journal has not accepted. Interruption is safe
2058 +
2059 +
2060 +● Editing src/context/engine.ts · 0.7s
2061 +
2062 +❯ rerun the tests
2063 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
2064 +
2065 +
2066 +
2067 +
2068 +
2069 +
2070 +❯ rerun the tests
2071 +[?25h[?2026l[?2026h[?25l
2072 +
2073 +
2074 +because
2075 +
2076 +
2077 +
2078 +
2079 +[?25h[?2026l[?2026h[?25l
2080 +
2081 +
2082 +
2083 +
2084 +
2085 +
2086 +❯ rerun the tests t
2087 +[?25h[?2026l[?2026h[?25l
2088 +
2089 +
2090 +because a cancel
2091 +
2092 +● Editing src/context/engine.ts · 0.8s
2093 +
2094 +
2095 +[?25h[?2026l[?2026h[?25l
2096 +
2097 +
2098 +
2099 +
2100 +
2101 +
2102 +❯ rerun the tests th
2103 +[?25h[?2026l[?2026h[?25l
2104 +
2105 +
2106 +because a cancelled writ
2107 +
2108 +
2109 +
2110 +
2111 +[?25h[?2026l[?2026h[?25l
2112 +
2113 +
2114 +
2115 +
2116 +
2117 +
2118 +❯ rerun the tests the
2119 +[?25h[?2026l[?2026h[?25l
2120 +
2121 +
2122 +because a cancelled write is ind
2123 +
2124 +
2125 +
2126 +
2127 +[?25h[?2026l[?2026h[?25l
2128 +
2129 +
2130 +
2131 +
2132 +
2133 +
2134 +❯ rerun the tests then
2135 +[?25h[?2026l[?2026h[?25l
2136 +
2137 +
2138 +because a cancelled write is indistingui
2139 +
2140 +● Editing src/context/engine.ts · 0.9s
2141 +
2142 +
2143 +[?25h[?2026l[?2026h[?25l
2144 +
2145 +
2146 +
2147 +
2148 +
2149 +
2150 +❯ rerun the tests then
2151 +[?25h[?2026l[?2026h[?25l
2152 +
2153 +
2154 +because a cancelled write is indistinguishable f
2155 +
2156 +
2157 +
2158 +❯ rerun the tests then v
2159 +[?25h[?2026l[?2026h[?25l
2160 +
2161 +
2162 +
2163 +
2164 +
2165 +
2166 +
2167 +[?25h[?2026l[?2026h[?25l
2168 +
2169 +
2170 +because a cancelled write is indistinguishable from a wr
2171 +
2172 +
2173 +
2174 +❯ rerun the tests then ve
2175 +[?25h[?2026l[?2026h[?25l
2176 +
2177 +
2178 +
2179 +
2180 +● Editing src/context/engine.ts · 1.0s
2181 +
2182 +❯ rerun the tests then ver
2183 +[?25h[?2026l[?2026h[?25l
2184 +
2185 +
2186 +because a cancelled write is indistinguishable from a write that
2187 +
2188 +
2189 +
2190 +
2191 +[?25h[?2026l[?2026h[?25lThe retry loop is deliberately synchronous with the event bus:
2192 +observations settle in order, and the live region never shows a
2193 +frame that the journal has not accepted. Interruption is safe
2194 +because a cancelled write is indistinguishable from a write that
2195 +never s
2196 +
2197 +● Editing src/context/engine.ts · 1.0s
2198 +
2199 +❯ rerun the tests then ver
2200 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
2201 +
2202 +
2203 +
2204 +
2205 +
2206 +
2207 +
2208 +❯ rerun the tests then veri
2209 +[?25h[?2026l[?2026h[?25l
2210 +
2211 +
2212 +
2213 +
2214 +
2215 +
2216 +
2217 +
2218 +[?25h[?2026l[?2026h[?25l
2219 +
2220 +
2221 +
2222 +never started —
2223 +
2224 +
2225 +
2226 +❯ rerun the tests then verif
2227 +[?25h[?2026l[?2026h[?25l
2228 +
2229 +
2230 +
2231 +never started — the jou
2232 +
2233 +● Editing src/context/engine.ts · 1.1s
2234 +
2235 +❯ rerun the tests then verify
2236 +[?25h[?2026l[?2026h[?25l
2237 +
2238 +
2239 +
2240 +never started — the journal eit
2241 +
2242 +
2243 +
2244 +❯ rerun the tests then verify
2245 +[?25h[?2026l[?2026h[?25l
2246 +
2247 +
2248 +
2249 +
2250 +
2251 +
2252 +
2253 +
2254 +[?25h[?2026l[?2026h[?25l
2255 +
2256 +
2257 +
2258 +never started — the journal either has
2259 +
2260 +
2261 +
2262 +❯ rerun the tests then verify t
2263 +[?25h[?2026l[?2026h[?25l
2264 +
2265 +
2266 +
2267 +
2268 +
2269 +● Editing src/context/engine.ts · 1.2s
2270 +
2271 +❯ rerun the tests then verify th
2272 +[?25h[?2026l[?2026h[?25l
2273 +
2274 +
2275 +
2276 +never started — the journal either has the full
2277 +
2278 +
2279 +
2280 +
2281 +[?25h[?2026l[?2026h[?25l
2282 +
2283 +
2284 +
2285 +
2286 +
2287 +
2288 +
2289 +❯ rerun the tests then verify the
2290 +[?25h[?2026l[?2026h[?25l
2291 +
2292 +
2293 +
2294 +never started — the journal either has the full event o
2295 +
2296 +
2297 +
2298 +
2299 +[?25h[?2026l[?2026h[?25l
2300 +
2301 +
2302 +
2303 +never started — the journal either has the full event or nothin
2304 +
2305 +
2306 +
2307 +
2308 +[?25h[?2026l[?2026h[?25l
2309 +
2310 +
2311 +
2312 +
2313 +
2314 +
2315 +
2316 +❯ rerun the tests then verify the
2317 +[?25h[?2026l[?2026h[?25lThe retry loop is deliberately synchronous with the event bus:
2318 +observations settle in order, and the live region never shows a
2319 +frame that the journal has not accepted. Interruption is safe
2320 +because a cancelled write is indistinguishable from a write that
2321 +never started — the journal either has the full event or nothing.
2322 +
2323 +Two
2324 +
2325 +● Editing src/context/engine.ts · 1.3s
2326 +
2327 +❯ rerun the tests then verify the j
2328 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
2329 +
2330 +
2331 +
2332 +❯ rerun the tests then verify the jo
2333 +[?25h[?2026l[?2026h[?25lTwo details
2334 +
2335 +
2336 +
2337 +
2338 +[?25h[?2026l[?2026h[?25lTwo details worth ca
2339 +
2340 +
2341 +
2342 +
2343 +[?25h[?2026l[?2026h[?25l
2344 +
2345 +
2346 +
2347 +❯ rerun the tests then verify the jou
2348 +[?25h[?2026l[?2026h[?25lTwo details worth calling ou
2349 +
2350 +● Editing src/context/engine.ts · 1.4s
2351 +
2352 +❯ rerun the tests then verify the jour
2353 +[?25h[?2026l[?2026h[?25lTwo details worth calling out for re
2354 +
2355 +
2356 +
2357 +❯ rerun the tests then verify the journ
2358 +[?25h[?2026l[?2026h[?25lTwo details worth calling out for review:
2359 +
2360 +1
2361 +
2362 +● Editing src/context/engine.ts · 1.4s
2363 +
2364 +❯ rerun the tests then verify the journ
2365 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
2366 +
2367 +
2368 +
2369 +❯ rerun the tests then verify the journa
2370 +[?25h[?2026l[?2026h[?25l1. `isTra
2371 +
2372 +● Editing src/context/engine.ts · 1.5s
2373 +
2374 +❯ rerun the tests then verify the journal
2375 +[?25h[?2026l[?2026h[?25l1. `isTransient`
2376 +
2377 +
2378 +
2379 +❯ rerun the tests then verify the journal
2380 +[?25h[?2026l[?2026h[?25l1. `isTransient` treats `
2381 +
2382 +● Editing src/context/engine.ts · 1.6s
2383 +
2384 +
2385 +[?25h[?2026l[?2026h[?25l
2386 +❯ rerun the tests then verify the journal
2387 +
2388 +1. `isTransient` treats `
2389 +
2390 +● Editing src/context/engine.ts · 1.6s
2391 +
2392 +❯
2393 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
2394 +
2395 +
2396 +
2397 +❯ c
2398 +[?25h[?2026l[?2026h[?25l1. `isTransient` treats `EAGAIN`,
2399 +
2400 +
2401 +
2402 +❯ ch
2403 +[?25h[?2026l[?2026h[?25l
2404 +
2405 +
2406 +
2407 +❯ che
2408 +[?25h[?2026l[?2026h[?25l1. `isTransient` treats `EAGAIN`, `EBUSY`
2409 +
2410 +
2411 +
2412 +
2413 +[?25h[?2026l[?2026h[?25l1. `isTransient` treats `EAGAIN`, `EBUSY` and `EI
2414 +
2415 +● Editing src/context/engine.ts · 1.7s
2416 +
2417 +
2418 +[?25h[?2026l[?2026h[?25l
2419 +
2420 +
2421 +
2422 +❯ chec
2423 +[?25h[?2026l[?2026h[?25l1. `isTransient` treats `EAGAIN`, `EBUSY` and `EINTR` as
2424 +
2425 +
2426 +
2427 +❯ check
2428 +[?25h[?2026l[?2026h[?25l1. `isTransient` treats `EAGAIN`, `EBUSY` and `EINTR` as retryabl
2429 +
2430 +
2431 +
2432 +❯ check
2433 +[?25h[?2026l[?2026h[?25l
2434 +
2435 +● Editing src/context/engine.ts · 1.8s
2436 +
2437 +
2438 +[?25h[?2026l[?2026h[?25l1. `isTransient` treats `EAGAIN`, `EBUSY` and `EINTR` as retryable
2439 +2. the
2440 +
2441 +● Editing src/context/engine.ts · 1.8s
2442 +
2443 +❯ check t
2444 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
2445 +2. the backoff
2446 +
2447 +
2448 +
2449 +❯ check th
2450 +[?25h[?2026l[?2026h[?25l
2451 +2. the backoff delays
2452 +
2453 +
2454 +
2455 +❯ check the
2456 +[?25h[?2026l[?2026h[?25l
2457 +
2458 +
2459 +● Editing src/context/engine.ts · 1.9s
2460 +
2461 +
2462 +[?25h[?2026l[?2026h[?25l
2463 +2. the backoff delays are cumu
2464 +
2465 +
2466 +
2467 +❯ check the
2468 +[?25h[?2026l[?2026h[?25l
2469 +
2470 +
2471 +
2472 +
2473 +❯ check the s
2474 +[?25h[?2026l[?2026h[?25l
2475 +2. the backoff delays are cumulative w
2476 +
2477 +
2478 +
2479 +
2480 +[?25h[?2026l[?2026h[?25l
2481 +2. the backoff delays are cumulative worst-cas
2482 +
2483 +
2484 +
2485 +❯ check the se
2486 +[?25h[?2026l[?2026h[?25l
2487 +
2488 +
2489 +● Editing src/context/engine.ts · 2.0s
2490 +
2491 +
2492 +[?25h[?2026l[?2026h[?25l
2493 +2. the backoff delays are cumulative worst-case 42 ms,
2494 +
2495 +
2496 +
2497 +❯ check the ses
2498 +[?25h[?2026l[?2026h[?25l
2499 +
2500 +
2501 +
2502 +
2503 +❯ check the sess
2504 +[?25h[?2026l[?2026h[?25l
2505 +2. the backoff delays are cumulative worst-case 42 ms, well un
2506 +
2507 +
2508 +
2509 +
2510 +[?25h[?2026l[?2026h[?25l
2511 +
2512 +
2513 +
2514 +
2515 +❯ check the sessi
2516 +[?25h[?2026l[?2026h[?25l1. `isTransient` treats `EAGAIN`, `EBUSY` and `EINTR` as retryable
2517 +2. the backoff delays are cumulative worst-case 42 ms, well under
2518 + t
2519 +
2520 +● Editing src/context/engine.ts · 2.0s
2521 +
2522 +❯ check the sessi
2523 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
2524 +
2525 +
2526 +
2527 +● Editing src/context/engine.ts · 2.1s
2528 +
2529 +❯ check the sessio
2530 +[?25h[?2026l[?2026h[?25l
2531 +
2532 + the 100 m
2533 +
2534 +
2535 +
2536 +
2537 +[?25h[?2026l[?2026h[?25l
2538 +
2539 +
2540 +
2541 +
2542 +
2543 +❯ check the session
2544 +[?25h[?2026l[?2026h[?25l
2545 +
2546 + the 100 ms budget
2547 +
2548 +
2549 +
2550 +
2551 +[?25h[?2026l[?2026h[?25l
2552 +
2553 + the 100 ms budget for a s
2554 +
2555 +
2556 +
2557 +❯ check the session
2558 +[?25h[?2026l[?2026h[?25l
2559 +
2560 +
2561 +
2562 +● Editing src/context/engine.ts · 2.2s
2563 +
2564 +
2565 +[?25h[?2026l[?2026h[?25l
2566 +
2567 + the 100 ms budget for a settled-e
2568 +
2569 +
2570 +
2571 +❯ check the session s
2572 +[?25h[?2026l[?2026h[?25l
2573 +
2574 + the 100 ms budget for a settled-event flu
2575 +
2576 +
2577 +
2578 +❯ check the session st
2579 +[?25h[?2026l[?2026h[?25l1. `isTransient` treats `EAGAIN`, `EBUSY` and `EINTR` as retryable
2580 +2. the backoff delays are cumulative worst-case 42 ms, well under
2581 + the 100 ms budget for a settled-event flush
2582 +
2583 +With
2584 +
2585 +● Editing src/context/engine.ts · 2.2s
2586 +
2587 +❯ check the session sto
2588 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
2589 +
2590 +● Editing src/context/engine.ts · 2.3s
2591 +
2592 +
2593 +[?25h[?2026l[?2026h[?25lWith this in
2594 +
2595 +
2596 +
2597 +❯ check the session stor
2598 +[?25h[?2026l[?2026h[?25l
2599 +
2600 +
2601 +
2602 +❯ check the session store
2603 +[?25h[?2026l[?2026h[?25lWith this in place t
2604 +
2605 +
2606 +
2607 +
2608 +[?25h[?2026l[?2026h[?25lWith this in place the flaky
2609 +
2610 +
2611 +
2612 +❯ check the session store
2613 +[?25h[?2026l[?2026h[?25l
2614 +
2615 +● Editing src/context/engine.ts · 2.4s
2616 +
2617 +
2618 +[?25h[?2026l[?2026h[?25lWith this in place the flaky `store.
2619 +
2620 +
2621 +
2622 +❯ check the session store r
2623 +[?25h[?2026l[?2026h[?25l
2624 +
2625 +
2626 +
2627 +❯ check the session store re
2628 +[?25h[?2026l[?2026h[?25lWith this in place the flaky `store.test.ts`
2629 +
2630 +
2631 +
2632 +
2633 +[?25h[?2026l[?2026h[?25l
2634 +
2635 +
2636 +
2637 +❯ check the session store ret
2638 +[?25h[?2026l[?2026h[?25lWith this in place the flaky `store.test.ts` failure
2639 +
2640 +
2641 +
2642 +
2643 +[?25h[?2026l[?2026h[?25lWith this in place the flaky `store.test.ts` failures stop
2644 +r
2645 +
2646 +● Editing src/context/engine.ts · 2.5s
2647 +
2648 +❯ check the session store ret
2649 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
2650 +
2651 +
2652 +
2653 +
2654 +❯ check the session store retr
2655 +[?25h[?2026l[?2026h[?25l
2656 +
2657 +
2658 +
2659 +
2660 +❯ check the session store retry
2661 +[?25h[?2026l[?2026h[?25l
2662 +reproduci
2663 +
2664 +
2665 +
2666 +
2667 +[?25h[?2026l[?2026h[?25l
2668 +
2669 +
2670 +
2671 +
2672 +❯ check the session store retry
2673 +[?25h[?2026l[?2026h[?25l
2674 +reproducing under
2675 +
2676 +● Editing src/context/engine.ts · 2.6s
2677 +
2678 +
2679 +[?25h[?2026l[?2026h[?25l
2680 +
2681 +
2682 +
2683 +
2684 +
2685 +[?25h[?2026l[?2026h[?25l
2686 +reproducing under load, a
2687 +
2688 +
2689 +
2690 +❯ check the session store retry l
2691 +[?25h[?2026l[?2026h[?25l
2692 +
2693 +
2694 +
2695 +
2696 +❯ check the session store retry lo
2697 +[?25h[?2026l[?2026h[?25l
2698 +reproducing under load, and the a
2699 +
2700 +
2701 +
2702 +
2703 +[?25h[?2026l[?2026h[?25l
2704 +
2705 +
2706 +
2707 +
2708 +❯ check the session store retry log
2709 +[?25h[?2026l[?2026h[?25l
2710 +reproducing under load, and the append pa
2711 +
2712 +
2713 +
2714 +
2715 +[?25h[?2026l[?2026h[?25l
2716 +
2717 +
2718 +● Editing src/context/engine.ts · 2.7s
2719 +
2720 +❯ check the session store retry logi
2721 +[?25h[?2026l[?2026h[?25l
2722 +reproducing under load, and the append path stays
2723 +
2724 +
2725 +
2726 +
2727 +[?25h[?2026l[?2026h[?25l
2728 +reproducing under load, and the append path stays inside
2729 +
2730 +
2731 +
2732 +❯ check the session store retry logic
2733 +[?25h[?2026l[?2026h[?25lWith this in place the flaky `store.test.ts` failures stop
2734 +reproducing under load, and the append path stays inside the hot
2735 +
2736 +
2737 +● Editing src/context/engine.ts · 2.7s
2738 +
2739 +❯ check the session store retry logic
2740 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
2741 +
2742 +
2743 +
2744 +● Editing src/context/engine.ts · 2.8s
2745 +
2746 +
2747 +[?25h[?2026l[?2026h[?25l
2748 +
2749 +
2750 +
2751 +
2752 +
2753 +❯ check the session store retry logic a
2754 +[?25h[?2026l[?2026h[?25l
2755 +
2756 +loop bud
2757 +
2758 +
2759 +
2760 +
2761 +[?25h[?2026l[?2026h[?25l
2762 +
2763 +loop budget. The
2764 +
2765 +
2766 +
2767 +❯ check the session store retry logic an
2768 +[?25h[?2026l[?2026h[?25l
2769 +
2770 +loop budget. The remaini
2771 +
2772 +
2773 +
2774 +❯ check the session store retry logic and
2775 +[?25h[?2026l[?2026h[?25l
2776 +
2777 +
2778 +
2779 +● Editing src/context/engine.ts · 2.9s
2780 +
2781 +
2782 +[?25h[?2026l[?2026h[?25l
2783 +
2784 +
2785 +
2786 +
2787 +
2788 +❯ check the session store retry logic and
2789 +[?25h[?2026l[?2026h[?25l
2790 +
2791 +loop budget. The remaining work
2792 +
2793 +
2794 +
2795 +
2796 +[?25h[?2026l[?2026h[?25l
2797 +❯ check the session store retry logic and
2798 +
2799 +With this in place the flaky `store.test.ts` failures stop
2800 +reproducing under load, and the append path stays inside the hot
2801 +loop budget. The remaining work is to su
2802 +
2803 +● Editing src/context/engine.ts · 2.9s
2804 +
2805 +❯
2806 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
2807 +
2808 +
2809 +
2810 +
2811 +
2812 +❯ r
2813 +[?25h[?2026l[?2026h[?25l
2814 +
2815 +loop budget. The remaining work is to surface `W
2816 +
2817 +
2818 +
2819 +❯ re
2820 +[?25h[?2026l[?2026h[?25l
2821 +
2822 +
2823 +
2824 +● Editing src/context/engine.ts · 3.0s
2825 +
2826 +
2827 +[?25h[?2026l[?2026h[?25l
2828 +
2829 +loop budget. The remaining work is to surface `WriteFail
2830 +
2831 +
2832 +
2833 +❯ rer
2834 +[?25h[?2026l[?2026h[?25lWith this in place the flaky `store.test.ts` failures stop
2835 +reproducing under load, and the append path stays inside the hot
2836 +loop budget. The remaining work is to surface `WriteFailed` in
2837 +t
2838 +
2839 +● Editing src/context/engine.ts · 3.0s
2840 +
2841 +❯ rer
2842 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
2843 +
2844 +
2845 +
2846 +
2847 +
2848 +
2849 +❯ reru
2850 +[?25h[?2026l[?2026h[?25l
2851 +
2852 +
2853 +the statu
2854 +
2855 +
2856 +
2857 +
2858 +[?25h[?2026l[?2026h[?25l
2859 +
2860 +
2861 +
2862 +
2863 +
2864 +
2865 +❯ rerun
2866 +[?25h[?2026l[?2026h[?25l
2867 +
2868 +
2869 +
2870 +
2871 +● Editing src/context/engine.ts · 3.1s
2872 +
2873 +
2874 +[?25h[?2026l[?2026h[?25l
2875 +
2876 +
2877 +the status bar so
2878 +
2879 +
2880 +
2881 +❯ rerun
2882 +[?25h[?2026l[?2026h[?25l
2883 +
2884 +
2885 +the status bar so a dying
2886 +
2887 +
2888 +
2889 +
2890 +[?25h[?2026l[?2026h[?25l
2891 +
2892 +
2893 +
2894 +
2895 +
2896 +
2897 +❯ rerun t
2898 +[?25h[?2026l[?2026h[?25l
2899 +
2900 +
2901 +the status bar so a dying disk is
2902 +
2903 +
2904 +
2905 +❯ rerun th
2906 +[?25h[?2026l[?2026h[?25l
2907 +
2908 +
2909 +
2910 +
2911 +● Editing src/context/engine.ts · 3.2s
2912 +
2913 +
2914 +[?25h[?2026l[?2026h[?25l
2915 +
2916 +
2917 +the status bar so a dying disk is visible
2918 +
2919 +
2920 +
2921 +❯ rerun the
2922 +[?25h[?2026l[?2026h[?25l
2923 +
2924 +
2925 +
2926 +
2927 +
2928 +
2929 +❯ rerun the
2930 +[?25h[?2026l[?2026h[?25l
2931 +
2932 +
2933 +the status bar so a dying disk is visible before
2934 +
2935 +
2936 +
2937 +
2938 +[?25h[?2026l[?2026h[?25l
2939 +
2940 +
2941 +
2942 +
2943 +
2944 +
2945 +❯ rerun the t
2946 +[?25h[?2026l[?2026h[?25l
2947 +
2948 +
2949 +the status bar so a dying disk is visible before data is
2950 +
2951 +● Editing src/context/engine.ts · 3.3s
2952 +
2953 +
2954 +[?25h[?2026l[?2026h[?25l
2955 +
2956 +
2957 +
2958 +
2959 +
2960 +
2961 +❯ rerun the te
2962 +[?25h[?2026l[?2026h[?25lWith this in place the flaky `store.test.ts` failures stop
2963 +reproducing under load, and the append path stays inside the hot
2964 +loop budget. The remaining work is to surface `WriteFailed` in
2965 +the status bar so a dying disk is visible before data is lost.
2966 +
2967 +
2968 +● Editing src/context/engine.ts · 3.3s
2969 +
2970 +❯ rerun the te
2971 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
2972 +
2973 +
2974 +
2975 +
2976 +
2977 +
2978 +
2979 +❯ rerun the tes
2980 +[?25h[?2026l[?2026h[?25lWith this in place the flaky `store.test.ts` failures stop
2981 +reproducing under load, and the append path stays inside the hot
2982 +loop budget. The remaining work is to surface `WriteFailed` in
2983 +the status bar so a dying disk is visible before data is lost.
2984 +
2985 + ▸ Run npm test · passed · 4.2s
2986 +
2987 +❯ rerun the tes
2988 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l ❯ rerun the test
2989 +[?25h[?2026l[?2026h[?25l ❯ rerun the tests
2990 +[?25h[?2026l[?2026h[?25l ❯ rerun the tests
2991 +[?25h[?2026l[?2026h[?25l ❯ rerun the tests t
2992 +[?25h[?2026l[?2026h[?25l ❯ rerun the tests th
2993 +[?25h[?2026l[?2026h[?25l ❯ rerun the tests the
2994 +[?25h[?2026l[?2026h[?25l ❯ rerun the tests then
2995 +[?25h[?2026l[?2026h[?25l ❯ rerun the tests then
2996 +[?25h[?2026l[?2026h[?25l ❯ rerun the tests then v
2997 +[?25h[?2026l[?2026h[?25l ❯ rerun the tests then ve
2998 +[?25h[?2026l[?2026h[?25l ❯ rerun the tests then ver
2999 +[?25h[?2026l[?2026h[?25l ❯ rerun the tests then veri
3000 +[?25h[?2026l[?2026h[?25l ❯ rerun the tests then verif
3001 +[?25h[?2026l[?2026h[?25l ❯ rerun the tests then verify
3002 +[?25h[?2026l[?2026h[?25l ❯ rerun the tests then verify
3003 +[?25h[?2026l[?2026h[?25l ❯ rerun the tests then verify t
3004 +[?25h[?2026l[?2026h[?25l ❯ rerun the tests then verify th
3005 +[?25h[?2026l[?2026h[?25l ❯ rerun the tests then verify the
3006 +[?25h[?2026l[?2026h[?25l ❯ rerun the tests then verify the
3007 +[?25h[?2026l[?2026h[?25l ❯ rerun the tests then verify the j
3008 +[?25h[?2026l[?2026h[?25l ● Reading src/session/store.ts · 0.0s
3009 +
3010 +❯ rerun the tests then verify the j
3011 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
3012 +
3013 +❯ rerun the tests then verify the jo
3014 +[?25h[?2026l[?2026h[?25l
3015 +
3016 +❯ rerun the tests then verify the jou
3017 +[?25h[?2026l[?2026h[?25l● Reading src/session/store.ts · 0.1s
3018 +
3019 +
3020 +[?25h[?2026l[?2026h[?25l
3021 +
3022 +❯ rerun the tests then verify the jour
3023 +[?25h[?2026l[?2026h[?25l
3024 +
3025 +❯ rerun the tests then verify the journ
3026 +[?25h[?2026l[?2026h[?25l
3027 +
3028 +❯ rerun the tests then verify the journa
3029 +[?25h[?2026l[?2026h[?25l● Reading src/session/store.ts · 0.2s
3030 +
3031 +
3032 +[?25h[?2026l[?2026h[?25l
3033 +
3034 +❯ rerun the tests then verify the journal
3035 +[?25h[?2026l[?2026h[?25l
3036 +
3037 +❯ rerun the tests then verify the journal
3038 +[?25h[?2026l[?2026h[?25l
3039 +❯ rerun the tests then verify the journal
3040 +
3041 +● Reading src/session/store.ts · 0.2s
3042 +
3043 +❯
3044 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
3045 +
3046 +❯ c
3047 +[?25h[?2026l[?2026h[?25l● Reading src/session/store.ts · 0.3s
3048 +
3049 +
3050 +[?25h[?2026l[?2026h[?25l
3051 +
3052 +❯ ch
3053 +[?25h[?2026l[?2026h[?25l
3054 +
3055 +❯ che
3056 +[?25h[?2026l[?2026h[?25l
3057 +
3058 +❯ chec
3059 +[?25h[?2026l[?2026h[?25l● Reading src/session/store.ts · 0.4s
3060 +
3061 +
3062 +[?25h[?2026l[?2026h[?25l
3063 +
3064 +❯ check
3065 +[?25h[?2026l[?2026h[?25l
3066 +
3067 +❯ check
3068 +[?25h[?2026l[?2026h[?25l● Reading src/session/store.ts · 0.5s
3069 +
3070 +❯ check t
3071 +[?25h[?2026l[?2026h[?25l
3072 +
3073 +
3074 +[?25h[?2026l[?2026h[?25l
3075 +
3076 +❯ check th
3077 +[?25h[?2026l[?2026h[?25l ▸ Read src/session/store.ts · 212 lines
3078 +● Reading src/session/store.ts · 0.5s
3079 +
3080 +❯ check th
3081 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
3082 +
3083 +❯ check the
3084 +[?25h[?2026l[?2026h[?25l● Reading src/session/store.ts · 0.6s
3085 +
3086 +❯ check the
3087 +[?25h[?2026l[?2026h[?25l
3088 +
3089 +
3090 +[?25h[?2026l[?2026h[?25l
3091 +
3092 +❯ check the s
3093 +[?25h[?2026l[?2026h[?25l
3094 +
3095 +❯ check the se
3096 +[?25h[?2026l[?2026h[?25l● Reading src/session/store.ts · 0.7s
3097 +
3098 +❯ check the ses
3099 +[?25h[?2026l[?2026h[?25l
3100 +
3101 +
3102 +[?25h[?2026l[?2026h[?25l
3103 +
3104 +❯ check the sess
3105 +[?25h[?2026l[?2026h[?25l
3106 +
3107 +❯ check the sessi
3108 +[?25h[?2026l[?2026h[?25l ▸ Search "retry" · 6 matches
3109 +● Thinking · 0.0s
3110 +
3111 +❯ check the sessi
3112 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
3113 +
3114 +❯ check the sessio
3115 +[?25h[?2026l[?2026h[?25l
3116 +
3117 +
3118 +[?25h[?2026l[?2026h[?25l
3119 +
3120 +❯ check the session
3121 +[?25h[?2026l[?2026h[?25l● Thinking · 0.1s
3122 +
3123 +❯ check the session
3124 +[?25h[?2026l[?2026h[?25l
3125 +
3126 +❯ check the session s
3127 +[?25h[?2026l[?2026h[?25l
3128 +
3129 +
3130 +[?25h[?2026l[?2026h[?25l
3131 +
3132 +❯ check the session st
3133 +[?25h[?2026l[?2026h[?25l● Thinking · 0.2s
3134 +
3135 +❯ check the session sto
3136 +[?25h[?2026l[?2026h[?25l
3137 +
3138 +❯ check the session stor
3139 +[?25h[?2026l[?2026h[?25l
3140 +
3141 +
3142 +[?25h[?2026l[?2026h[?25l
3143 +
3144 +❯ check the session store
3145 +[?25h[?2026l[?2026h[?25l● Thinking · 0.3s
3146 +
3147 +❯ check the session store
3148 +[?25h[?2026l[?2026h[?25l
3149 +
3150 +❯ check the session store r
3151 +[?25h[?2026l[?2026h[?25l
3152 +
3153 +
3154 +[?25h[?2026l[?2026h[?25l
3155 +
3156 +❯ check the session store re
3157 +[?25h[?2026l[?2026h[?25l● Thinking · 0.4s
3158 +
3159 +❯ check the session store ret
3160 +[?25h[?2026l[?2026h[?25l## Sessi
3161 +
3162 +● Writing · 0.0s
3163 +
3164 +❯ check the session store ret
3165 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
3166 +
3167 +
3168 +
3169 +❯ check the session store retr
3170 +[?25h[?2026l[?2026h[?25l
3171 +
3172 +
3173 +
3174 +
3175 +[?25h[?2026l[?2026h[?25l## Session store
3176 +
3177 +
3178 +
3179 +❯ check the session store retry
3180 +[?25h[?2026l[?2026h[?25l## Session store retry l
3181 +
3182 +● Writing · 0.1s
3183 +
3184 +
3185 +[?25h[?2026l[?2026h[?25l
3186 +
3187 +
3188 +
3189 +❯ check the session store retry
3190 +[?25h[?2026l[?2026h[?25l## Session store retry logic
3191 +
3192 +Th
3193 +
3194 +● Writing · 0.1s
3195 +
3196 +❯ check the session store retry
3197 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
3198 +
3199 +
3200 +
3201 +❯ check the session store retry l
3202 +[?25h[?2026l[?2026h[?25l
3203 +
3204 +
3205 +
3206 +
3207 +[?25h[?2026l[?2026h[?25lThe failur
3208 +
3209 +
3210 +
3211 +
3212 +[?25h[?2026l[?2026h[?25l
3213 +
3214 +
3215 +
3216 +❯ check the session store retry lo
3217 +[?25h[?2026l[?2026h[?25lThe failure point
3218 +
3219 +● Writing · 0.2s
3220 +
3221 +
3222 +[?25h[?2026l[?2026h[?25l
3223 +
3224 +
3225 +
3226 +❯ check the session store retry log
3227 +[?25h[?2026l[?2026h[?25lThe failure point is in `S
3228 +
3229 +
3230 +
3231 +
3232 +[?25h[?2026l[?2026h[?25l
3233 +
3234 +
3235 +
3236 +❯ check the session store retry logi
3237 +[?25h[?2026l[?2026h[?25l
3238 +
3239 +
3240 +
3241 +
3242 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionSt
3243 +
3244 +
3245 +
3246 +
3247 +[?25h[?2026l[?2026h[?25l
3248 +
3249 +
3250 +
3251 +❯ check the session store retry logic
3252 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.appe
3253 +
3254 +● Writing · 0.3s
3255 +
3256 +
3257 +[?25h[?2026l[?2026h[?25l
3258 +
3259 +
3260 +
3261 +❯ check the session store retry logic
3262 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.append` — jo
3263 +
3264 +
3265 +
3266 +
3267 +[?25h[?2026l[?2026h[?25l
3268 +
3269 +
3270 +
3271 +❯ check the session store retry logic a
3272 +[?25h[?2026l[?2026h[?25l
3273 +
3274 +
3275 +
3276 +
3277 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.append` — journal wr
3278 +
3279 +
3280 +
3281 +
3282 +[?25h[?2026l[?2026h[?25l
3283 +
3284 +
3285 +
3286 +❯ check the session store retry logic an
3287 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.append` — journal writes are
3288 +
3289 +● Writing · 0.4s
3290 +
3291 +
3292 +[?25h[?2026l[?2026h[?25l
3293 +
3294 +
3295 +
3296 +❯ check the session store retry logic and
3297 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.append` — journal writes are
3298 +not ret
3299 +
3300 +● Writing · 0.4s
3301 +
3302 +❯ check the session store retry logic and
3303 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
3304 +
3305 +
3306 +
3307 +
3308 +❯ check the session store retry logic and
3309 +[?25h[?2026l[?2026h[?25l
3310 +
3311 +
3312 +
3313 +
3314 +
3315 +[?25h[?2026l[?2026h[?25l
3316 +not retried on
3317 +
3318 +
3319 +
3320 +
3321 +[?25h[?2026l[?2026h[?25l
3322 +❯ check the session store retry logic and
3323 +
3324 +The failure point is in `SessionStore.append` — journal writes are
3325 +not retried on
3326 +
3327 +● Writing · 0.4s
3328 +
3329 +❯
3330 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
3331 +
3332 +
3333 +
3334 +
3335 +❯ r
3336 +[?25h[?2026l[?2026h[?25l
3337 +not retried on transien
3338 +
3339 +● Writing · 0.5s
3340 +
3341 +
3342 +[?25h[?2026l[?2026h[?25l
3343 +
3344 +
3345 +
3346 +
3347 +❯ re
3348 +[?25h[?2026l[?2026h[?25l
3349 +not retried on transient `EAGAI
3350 +
3351 +
3352 +
3353 +
3354 +[?25h[?2026l[?2026h[?25l
3355 +
3356 +
3357 +
3358 +
3359 +❯ rer
3360 +[?25h[?2026l[?2026h[?25l
3361 +
3362 +
3363 +
3364 +
3365 +
3366 +[?25h[?2026l[?2026h[?25l
3367 +not retried on transient `EAGAIN`, so a
3368 +
3369 +
3370 +
3371 +
3372 +[?25h[?2026l[?2026h[?25l
3373 +
3374 +
3375 +
3376 +
3377 +❯ reru
3378 +[?25h[?2026l[?2026h[?25l
3379 +not retried on transient `EAGAIN`, so a busy fi
3380 +
3381 +● Writing · 0.6s
3382 +
3383 +
3384 +[?25h[?2026l[?2026h[?25l
3385 +
3386 +
3387 +
3388 +
3389 +❯ rerun
3390 +[?25h[?2026l[?2026h[?25l
3391 +not retried on transient `EAGAIN`, so a busy filesystem
3392 +
3393 +
3394 +
3395 +❯ rerun
3396 +[?25h[?2026l[?2026h[?25l
3397 +
3398 +
3399 +
3400 +
3401 +
3402 +[?25h[?2026l[?2026h[?25l
3403 +not retried on transient `EAGAIN`, so a busy filesystem drops t
3404 +
3405 +
3406 +
3407 +❯ rerun t
3408 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.append` — journal writes are
3409 +not retried on transient `EAGAIN`, so a busy filesystem drops the
3410 +event
3411 +
3412 +● Writing · 0.7s
3413 +
3414 +❯ rerun th
3415 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
3416 +
3417 +
3418 +
3419 +
3420 +
3421 +❯ rerun the
3422 +[?25h[?2026l[?2026h[?25l
3423 +
3424 +event and the
3425 +
3426 +
3427 +
3428 +
3429 +[?25h[?2026l[?2026h[?25l
3430 +
3431 +event and the session
3432 +
3433 +
3434 +
3435 +❯ rerun the
3436 +[?25h[?2026l[?2026h[?25l
3437 +
3438 +
3439 +
3440 +● Writing · 0.8s
3441 +
3442 +❯ rerun the t
3443 +[?25h[?2026l[?2026h[?25l
3444 +
3445 +event and the session log div
3446 +
3447 +
3448 +
3449 +
3450 +[?25h[?2026l[?2026h[?25l
3451 +
3452 +event and the session log diverges fr
3453 +
3454 +
3455 +
3456 +❯ rerun the te
3457 +[?25h[?2026l[?2026h[?25l
3458 +
3459 +
3460 +
3461 +
3462 +
3463 +
3464 +[?25h[?2026l[?2026h[?25l
3465 +
3466 +event and the session log diverges from what
3467 +
3468 +
3469 +
3470 +❯ rerun the tes
3471 +[?25h[?2026l[?2026h[?25l
3472 +
3473 +event and the session log diverges from what the user
3474 +
3475 +● Writing · 0.9s
3476 +
3477 +❯ rerun the test
3478 +[?25h[?2026l[?2026h[?25l
3479 +
3480 +
3481 +
3482 +
3483 +
3484 +❯ rerun the tests
3485 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.append` — journal writes are
3486 +not retried on transient `EAGAIN`, so a busy filesystem drops the
3487 +event and the session log diverges from what the user saw on
3488 +
3489 +
3490 +● Writing · 0.9s
3491 +
3492 +❯ rerun the tests
3493 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
3494 +
3495 +
3496 +
3497 +
3498 +
3499 +
3500 +❯ rerun the tests
3501 +[?25h[?2026l[?2026h[?25l
3502 +
3503 +
3504 +screen.
3505 +
3506 +● Writing · 1.0s
3507 +
3508 +
3509 +[?25h[?2026l[?2026h[?25l
3510 +
3511 +
3512 +screen. The fix
3513 +
3514 +
3515 +
3516 +❯ rerun the tests t
3517 +[?25h[?2026l[?2026h[?25l
3518 +
3519 +
3520 +screen. The fix wraps th
3521 +
3522 +
3523 +
3524 +❯ rerun the tests th
3525 +[?25h[?2026l[?2026h[?25l
3526 +
3527 +
3528 +
3529 +
3530 +
3531 +
3532 +
3533 +[?25h[?2026l[?2026h[?25l
3534 +
3535 +
3536 +screen. The fix wraps the journa
3537 +
3538 +● Writing · 1.1s
3539 +
3540 +❯ rerun the tests the
3541 +[?25h[?2026l[?2026h[?25l
3542 +
3543 +
3544 +screen. The fix wraps the journal write
3545 +
3546 +
3547 +
3548 +❯ rerun the tests then
3549 +[?25h[?2026l[?2026h[?25l
3550 +
3551 +
3552 +
3553 +
3554 +
3555 +
3556 +❯ rerun the tests then
3557 +[?25h[?2026l[?2026h[?25l
3558 +
3559 +
3560 +screen. The fix wraps the journal write in a bou
3561 +
3562 +
3563 +
3564 +
3565 +[?25h[?2026l[?2026h[?25l
3566 +
3567 +
3568 +screen. The fix wraps the journal write in a bounded ret
3569 +
3570 +● Writing · 1.2s
3571 +
3572 +❯ rerun the tests then v
3573 +[?25h[?2026l[?2026h[?25l
3574 +
3575 +
3576 +
3577 +
3578 +
3579 +
3580 +❯ rerun the tests then ve
3581 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.append` — journal writes are
3582 +not retried on transient `EAGAIN`, so a busy filesystem drops the
3583 +event and the session log diverges from what the user saw on
3584 +screen. The fix wraps the journal write in a bounded retry loop
3585 +
3586 +
3587 +● Writing · 1.2s
3588 +
3589 +❯ rerun the tests then ve
3590 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
3591 +
3592 +
3593 +
3594 +with exp
3595 +
3596 +
3597 +
3598 +❯ rerun the tests then ver
3599 +[?25h[?2026l[?2026h[?25l
3600 +
3601 +
3602 +
3603 +
3604 +
3605 +
3606 +
3607 +
3608 +[?25h[?2026l[?2026h[?25l
3609 +
3610 +
3611 +
3612 +with exponential
3613 +
3614 +● Writing · 1.3s
3615 +
3616 +❯ rerun the tests then veri
3617 +[?25h[?2026l[?2026h[?25l
3618 +
3619 +
3620 +
3621 +with exponential backoff
3622 +
3623 +
3624 +
3625 +❯ rerun the tests then verif
3626 +[?25h[?2026l[?2026h[?25l
3627 +
3628 +
3629 +
3630 +with exponential backoff, and ke
3631 +
3632 +
3633 +
3634 +❯ rerun the tests then verify
3635 +[?25h[?2026l[?2026h[?25l
3636 +
3637 +
3638 +
3639 +
3640 +
3641 +
3642 +
3643 +
3644 +[?25h[?2026l[?2026h[?25l
3645 +
3646 +
3647 +
3648 +with exponential backoff, and keeps the
3649 +
3650 +● Writing · 1.4s
3651 +
3652 +❯ rerun the tests then verify
3653 +[?25h[?2026l[?2026h[?25l
3654 +
3655 +
3656 +
3657 +
3658 +
3659 +
3660 +
3661 +❯ rerun the tests then verify t
3662 +[?25h[?2026l[?2026h[?25l
3663 +
3664 +
3665 +
3666 +with exponential backoff, and keeps the event lo
3667 +
3668 +
3669 +
3670 +
3671 +[?25h[?2026l[?2026h[?25l
3672 +
3673 +
3674 +
3675 +
3676 +
3677 +
3678 +
3679 +❯ rerun the tests then verify th
3680 +[?25h[?2026l[?2026h[?25l
3681 +
3682 +
3683 +
3684 +with exponential backoff, and keeps the event log append
3685 +
3686 +
3687 +
3688 +
3689 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.append` — journal writes are
3690 +not retried on transient `EAGAIN`, so a busy filesystem drops the
3691 +event and the session log diverges from what the user saw on
3692 +screen. The fix wraps the journal write in a bounded retry loop
3693 +with exponential backoff, and keeps the event log append-only.
3694 +
3695 +● Writing · 1.5s
3696 +
3697 +❯ rerun the tests then verify the
3698 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25lKey chan
3699 +
3700 +● Writing · 1.5s
3701 +
3702 +❯ rerun the tests then verify the
3703 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25lKey changes:
3704 +
3705 +-
3706 +
3707 +● Writing · 1.5s
3708 +
3709 +❯ rerun the tests then verify the j
3710 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l- `append`
3711 +
3712 +● Writing · 1.6s
3713 +
3714 +❯ rerun the tests then verify the jo
3715 +[?25h[?2026l[?2026h[?25l- `append` now ret
3716 +
3717 +
3718 +
3719 +❯ rerun the tests then verify the jou
3720 +[?25h[?2026l[?2026h[?25l
3721 +
3722 +
3723 +
3724 +❯ rerun the tests then verify the jour
3725 +[?25h[?2026l[?2026h[?25l- `append` now retries up
3726 +
3727 +
3728 +
3729 +
3730 +[?25h[?2026l[?2026h[?25l
3731 +
3732 +● Writing · 1.7s
3733 +
3734 +❯ rerun the tests then verify the journ
3735 +[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 tim
3736 +
3737 +
3738 +
3739 +
3740 +[?25h[?2026l[?2026h[?25l
3741 +
3742 +
3743 +
3744 +❯ rerun the tests then verify the journa
3745 +[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 times on `E
3746 +
3747 +
3748 +
3749 +
3750 +[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 times on `EAGAIN` /
3751 +
3752 +
3753 +
3754 +
3755 +[?25h[?2026l[?2026h[?25l
3756 +
3757 +
3758 +
3759 +❯ rerun the tests then verify the journal
3760 +[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 times on `EAGAIN` / `EBUSY`
3761 +
3762 +● Writing · 1.8s
3763 +
3764 +❯ rerun the tests then verify the journal
3765 +[?25h[?2026l[?2026h[?25l
3766 +❯ rerun the tests then verify the journal
3767 +
3768 +- `append` now retries up to 3 times on `EAGAIN` / `EBUSY`
3769 +
3770 +● Writing · 1.8s
3771 +
3772 +❯
3773 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 times on `EAGAIN` / `EBUSY`
3774 +- backo
3775 +
3776 +● Writing · 1.8s
3777 +
3778 +❯ c
3779 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
3780 +- backoff is 2
3781 +
3782 +
3783 +
3784 +
3785 +[?25h[?2026l[?2026h[?25l
3786 +
3787 +
3788 +
3789 +
3790 +❯ ch
3791 +[?25h[?2026l[?2026h[?25l
3792 +- backoff is 2 ms, 8 ms
3793 +
3794 +● Writing · 1.9s
3795 +
3796 +❯ che
3797 +[?25h[?2026l[?2026h[?25l
3798 +- backoff is 2 ms, 8 ms, 32 ms
3799 +
3800 +
3801 +
3802 +❯ chec
3803 +[?25h[?2026l[?2026h[?25l
3804 +- backoff is 2 ms, 8 ms, 32 ms — bounde
3805 +
3806 +
3807 +
3808 +❯ check
3809 +[?25h[?2026l[?2026h[?25l
3810 +- backoff is 2 ms, 8 ms, 32 ms — bounded, never
3811 +
3812 +● Writing · 2.0s
3813 +
3814 +❯ check
3815 +[?25h[?2026l[?2026h[?25l
3816 +- backoff is 2 ms, 8 ms, 32 ms — bounded, never user-vi
3817 +
3818 +
3819 +
3820 +
3821 +[?25h[?2026l[?2026h[?25l
3822 +
3823 +
3824 +
3825 +
3826 +❯ check t
3827 +[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 times on `EAGAIN` / `EBUSY`
3828 +- backoff is 2 ms, 8 ms, 32 ms — bounded, never user-visible
3829 +-
3830 +
3831 +● Writing · 2.0s
3832 +
3833 +❯ check th
3834 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
3835 +
3836 +- a `Write
3837 +
3838 +● Writing · 2.1s
3839 +
3840 +❯ check the
3841 +[?25h[?2026l[?2026h[?25l
3842 +
3843 +- a `WriteFailed`
3844 +
3845 +
3846 +
3847 +❯ check the
3848 +[?25h[?2026l[?2026h[?25l
3849 +
3850 +- a `WriteFailed` event is
3851 +
3852 +
3853 +
3854 +❯ check the s
3855 +[?25h[?2026l[?2026h[?25l
3856 +
3857 +- a `WriteFailed` event is emitted
3858 +
3859 +● Writing · 2.2s
3860 +
3861 +❯ check the se
3862 +[?25h[?2026l[?2026h[?25l
3863 +
3864 +- a `WriteFailed` event is emitted only af
3865 +
3866 +
3867 +
3868 +
3869 +[?25h[?2026l[?2026h[?25l
3870 +
3871 +
3872 +
3873 +
3874 +
3875 +❯ check the ses
3876 +[?25h[?2026l[?2026h[?25l
3877 +
3878 +- a `WriteFailed` event is emitted only after the
3879 +
3880 +
3881 +
3882 +❯ check the sess
3883 +[?25h[?2026l[?2026h[?25l
3884 +
3885 +- a `WriteFailed` event is emitted only after the final at
3886 +
3887 +● Writing · 2.3s
3888 +
3889 +
3890 +[?25h[?2026l[?2026h[?25l
3891 +
3892 +
3893 +
3894 +
3895 +
3896 +❯ check the sessi
3897 +[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 times on `EAGAIN` / `EBUSY`
3898 +- backoff is 2 ms, 8 ms, 32 ms — bounded, never user-visible
3899 +- a `WriteFailed` event is emitted only after the final attempt
3900 +-
3901 +
3902 +● Writing · 2.3s
3903 +
3904 +❯ check the sessi
3905 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
3906 +
3907 +
3908 +
3909 +
3910 +
3911 +
3912 +❯ check the sessio
3913 +[?25h[?2026l[?2026h[?25l
3914 +
3915 +
3916 +- no parti
3917 +
3918 +
3919 +
3920 +
3921 +[?25h[?2026l[?2026h[?25l
3922 +
3923 +
3924 +
3925 +
3926 +
3927 +
3928 +❯ check the session
3929 +[?25h[?2026l[?2026h[?25l
3930 +
3931 +
3932 +- no partial frame
3933 +
3934 +● Writing · 2.4s
3935 +
3936 +❯ check the session
3937 +[?25h[?2026l[?2026h[?25l
3938 +
3939 +
3940 +- no partial frames are ev
3941 +
3942 +
3943 +
3944 +❯ check the session s
3945 +[?25h[?2026l[?2026h[?25l
3946 +
3947 +
3948 +
3949 +
3950 +
3951 +
3952 +
3953 +[?25h[?2026l[?2026h[?25l
3954 +
3955 +
3956 +- no partial frames are ever kept
3957 +
3958 +
3959 +
3960 +❯ check the session st
3961 +[?25h[?2026l[?2026h[?25l
3962 +
3963 +
3964 +- no partial frames are ever kept in the j
3965 +
3966 +● Writing · 2.5s
3967 +
3968 +❯ check the session sto
3969 +[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 times on `EAGAIN` / `EBUSY`
3970 +- backoff is 2 ms, 8 ms, 32 ms — bounded, never user-visible
3971 +- a `WriteFailed` event is emitted only after the final attempt
3972 +- no partial frames are ever kept in the journal
3973 +
3974 +● Writing · 2.5s
3975 +
3976 +❯ check the session stor
3977 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
3978 +
3979 +
3980 +[?25h[?2026l[?2026h[?25l
3981 +
3982 +❯ check the session store
3983 +[?25h[?2026l[?2026h[?25l```ts
3984 +as
3985 +
3986 +● Writing · 2.6s
3987 +
3988 +❯ check the session store
3989 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
3990 +async appe
3991 +
3992 +
3993 +
3994 +❯ check the session store
3995 +[?25h[?2026l[?2026h[?25l
3996 +async append(event
3997 +
3998 +
3999 +
4000 +❯ check the session store r
4001 +[?25h[?2026l[?2026h[?25l
4002 +
4003 +
4004 +
4005 +
4006 +
4007 +[?25h[?2026l[?2026h[?25l
4008 +async append(event: Sessio
4009 +
4010 +
4011 +
4012 +❯ check the session store re
4013 +[?25h[?2026l[?2026h[?25l
4014 +
4015 +
4016 +● Writing · 2.7s
4017 +
4018 +❯ check the session store ret
4019 +[?25h[?2026l[?2026h[?25l
4020 +async append(event: SessionEvent):
4021 +
4022 +
4023 +
4024 +
4025 +[?25h[?2026l[?2026h[?25l
4026 +async append(event: SessionEvent): Promise
4027 +
4028 +
4029 +
4030 +❯ check the session store retr
4031 +[?25h[?2026l[?2026h[?25l
4032 +
4033 +
4034 +
4035 +
4036 +
4037 +[?25h[?2026l[?2026h[?25l
4038 +async append(event: SessionEvent): Promise<void> {
4039 +
4040 +
4041 +
4042 +❯ check the session store retry
4043 +[?25h[?2026l[?2026h[?25l```ts
4044 +async append(event: SessionEvent): Promise<void> {
4045 + for (
4046 +
4047 +● Writing · 2.8s
4048 +
4049 +❯ check the session store retry
4050 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
4051 +
4052 + for (let atte
4053 +
4054 +
4055 +
4056 +❯ check the session store retry l
4057 +[?25h[?2026l[?2026h[?25l
4058 +
4059 +
4060 +
4061 +
4062 +
4063 +
4064 +[?25h[?2026l[?2026h[?25l
4065 +
4066 + for (let attempt = 0;
4067 +
4068 +
4069 +
4070 +❯ check the session store retry lo
4071 +[?25h[?2026l[?2026h[?25l
4072 +
4073 + for (let attempt = 0; attempt
4074 +
4075 +● Writing · 2.9s
4076 +
4077 +❯ check the session store retry log
4078 +[?25h[?2026l[?2026h[?25l
4079 +
4080 +
4081 +
4082 +
4083 +
4084 +❯ check the session store retry logi
4085 +[?25h[?2026l[?2026h[?25l
4086 +
4087 + for (let attempt = 0; attempt < 3; at
4088 +
4089 +
4090 +
4091 +
4092 +[?25h[?2026l[?2026h[?25l
4093 +
4094 +
4095 +
4096 +
4097 +
4098 +❯ check the session store retry logic
4099 +[?25h[?2026l[?2026h[?25l
4100 +
4101 + for (let attempt = 0; attempt < 3; attempt++)
4102 +
4103 +● Writing · 3.0s
4104 +
4105 +
4106 +[?25h[?2026l[?2026h[?25l```ts
4107 +async append(event: SessionEvent): Promise<void> {
4108 + for (let attempt = 0; attempt < 3; attempt++) {
4109 + t
4110 +
4111 +● Writing · 3.0s
4112 +
4113 +❯ check the session store retry logic
4114 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l```ts
4115 +async append(event: SessionEvent): Promise<void> {
4116 + for (let attempt = 0; attempt < 3; attempt++) {
4117 + try {
4118 +
4119 +
4120 +● Writing · 3.0s
4121 +
4122 +❯ check the session store retry logic a
4123 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
4124 +
4125 +
4126 +
4127 +
4128 +
4129 +
4130 +
4131 +
4132 +[?25h[?2026l[?2026h[?25l
4133 +
4134 +
4135 +
4136 + await
4137 +
4138 +
4139 +
4140 +❯ check the session store retry logic an
4141 +[?25h[?2026l[?2026h[?25l
4142 +
4143 +
4144 +
4145 +
4146 +
4147 +● Writing · 3.1s
4148 +
4149 +❯ check the session store retry logic and
4150 +[?25h[?2026l[?2026h[?25l
4151 +
4152 +
4153 +
4154 + await this.jo
4155 +
4156 +
4157 +
4158 +
4159 +[?25h[?2026l[?2026h[?25l
4160 +
4161 +
4162 +
4163 + await this.journal.wr
4164 +
4165 +
4166 +
4167 +❯ check the session store retry logic and
4168 +[?25h[?2026l[?2026h[?25l
4169 +
4170 +
4171 +
4172 +
4173 +
4174 +
4175 +
4176 +
4177 +[?25h[?2026l[?2026h[?25l
4178 +❯ check the session store retry logic and
4179 +
4180 +```ts
4181 +async append(event: SessionEvent): Promise<void> {
4182 + for (let attempt = 0; attempt < 3; attempt++) {
4183 + try {
4184 + await this.journal.write(enco
4185 +
4186 +● Writing · 3.1s
4187 +
4188 +❯
4189 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
4190 +
4191 +
4192 +
4193 +
4194 +
4195 +
4196 +
4197 +❯ r
4198 +[?25h[?2026l[?2026h[?25l
4199 +
4200 +
4201 +
4202 + await this.journal.write(encode(event
4203 +
4204 +● Writing · 3.2s
4205 +
4206 +
4207 +[?25h[?2026l[?2026h[?25l
4208 +
4209 +
4210 +
4211 +
4212 +
4213 +
4214 +
4215 +❯ re
4216 +[?25h[?2026l[?2026h[?25l```ts
4217 +async append(event: SessionEvent): Promise<void> {
4218 + for (let attempt = 0; attempt < 3; attempt++) {
4219 + try {
4220 + await this.journal.write(encode(event));
4221 +
4222 +
4223 +● Writing · 3.2s
4224 +
4225 +❯ rer
4226 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
4227 +
4228 +
4229 +
4230 +
4231 +
4232 +
4233 +
4234 +
4235 +
4236 +[?25h[?2026l[?2026h[?25l
4237 +
4238 +
4239 +
4240 +
4241 + return
4242 +
4243 +
4244 +
4245 +❯ reru
4246 +[?25h[?2026l[?2026h[?25l```ts
4247 +async append(event: SessionEvent): Promise<void> {
4248 + for (let attempt = 0; attempt < 3; attempt++) {
4249 + try {
4250 + await this.journal.write(encode(event));
4251 + return;
4252 + }
4253 +
4254 +● Writing · 3.3s
4255 +
4256 +❯ rerun
4257 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
4258 +
4259 +
4260 +
4261 +
4262 +
4263 + } catch (e
4264 +
4265 +
4266 +
4267 +❯ rerun
4268 +[?25h[?2026l[?2026h[?25l
4269 +
4270 +
4271 +
4272 +
4273 +
4274 +
4275 +
4276 +
4277 +
4278 +
4279 +[?25h[?2026l[?2026h[?25l```ts
4280 +async append(event: SessionEvent): Promise<void> {
4281 + for (let attempt = 0; attempt < 3; attempt++) {
4282 + try {
4283 + await this.journal.write(encode(event));
4284 + return;
4285 + } catch (err) {
4286 +
4287 +
4288 +● Writing · 3.3s
4289 +
4290 +❯ rerun t
4291 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
4292 +
4293 +
4294 +
4295 +
4296 +
4297 +
4298 + if (
4299 +
4300 +● Writing · 3.4s
4301 +
4302 +❯ rerun th
4303 +[?25h[?2026l[?2026h[?25l
4304 +
4305 +
4306 +
4307 +
4308 +
4309 +
4310 + if (!isTrans
4311 +
4312 +
4313 +
4314 +❯ rerun the
4315 +[?25h[?2026l[?2026h[?25l
4316 +
4317 +
4318 +
4319 +
4320 +
4321 +
4322 +
4323 +
4324 +
4325 +
4326 +
4327 +[?25h[?2026l[?2026h[?25l
4328 +
4329 +
4330 +
4331 +
4332 +
4333 +
4334 + if (!isTransient(err
4335 +
4336 +
4337 +
4338 +❯ rerun the
4339 +[?25h[?2026l[?2026h[?25l
4340 +
4341 +
4342 +
4343 +
4344 +
4345 +
4346 + if (!isTransient(err)) throw
4347 +
4348 +● Writing · 3.5s
4349 +
4350 +❯ rerun the t
4351 +[?25h[?2026l[?2026h[?25l
4352 +
4353 +
4354 +
4355 +
4356 +
4357 +
4358 +
4359 +
4360 +
4361 +
4362 +❯ rerun the te
4363 +[?25h[?2026l[?2026h[?25l```ts
4364 +async append(event: SessionEvent): Promise<void> {
4365 + for (let attempt = 0; attempt < 3; attempt++) {
4366 + try {
4367 + await this.journal.write(encode(event));
4368 + return;
4369 + } catch (err) {
4370 + if (!isTransient(err)) throw err;
4371 +
4372 +
4373 +● Writing · 3.5s
4374 +
4375 +❯ rerun the te
4376 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
4377 +
4378 +
4379 +
4380 +
4381 +
4382 +
4383 +
4384 +
4385 +
4386 +
4387 +
4388 +
4389 +[?25h[?2026l[?2026h[?25l
4390 +
4391 +
4392 +
4393 +
4394 +
4395 +
4396 +
4397 + awai
4398 +
4399 +
4400 +
4401 +❯ rerun the tes
4402 +[?25h[?2026l[?2026h[?25l
4403 +
4404 +
4405 +
4406 +
4407 +
4408 +
4409 +
4410 + await delay(
4411 +
4412 +● Writing · 3.6s
4413 +
4414 +❯ rerun the test
4415 +[?25h[?2026l[?2026h[?25l
4416 +
4417 +
4418 +
4419 +
4420 +
4421 +
4422 +
4423 + await delay(2 ** (2
4424 +
4425 +
4426 +
4427 +❯ rerun the tests
4428 +[?25h[?2026l[?2026h[?25l
4429 +
4430 +
4431 +
4432 +
4433 +
4434 +
4435 +
4436 +
4437 +
4438 +
4439 +
4440 +
4441 +[?25h[?2026l[?2026h[?25l
4442 +
4443 +
4444 +
4445 +
4446 +
4447 +
4448 +
4449 +
4450 +
4451 +
4452 +
4453 +❯ rerun the tests
4454 +[?25h[?2026l[?2026h[?25l
4455 +
4456 +
4457 +
4458 +
4459 +
4460 +
4461 +
4462 + await delay(2 ** (2 * attemp
4463 +
4464 +● Writing · 3.7s
4465 +
4466 +
4467 +[?25h[?2026l[?2026h[?25l
4468 +
4469 +
4470 +
4471 +
4472 +
4473 +
4474 +
4475 + await delay(2 ** (2 * attempt + 1));
4476 +
4477 +
4478 +
4479 +❯ rerun the tests t
4480 +[?25h[?2026l[?2026h[?25l```ts
4481 +async append(event: SessionEvent): Promise<void> {
4482 + for (let attempt = 0; attempt < 3; attempt++) {
4483 + try {
4484 + await this.journal.write(encode(event));
4485 + return;
4486 + } catch (err) {
4487 + if (!isTransient(err)) throw err;
4488 + await delay(2 ** (2 * attempt + 1));
4489 + }
4490 +
4491 +
4492 +● Writing · 3.7s
4493 +
4494 +❯ rerun the tests th
4495 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
4496 +
4497 +
4498 +
4499 +
4500 +
4501 +
4502 +
4503 +
4504 +
4505 +
4506 +
4507 +
4508 +
4509 +
4510 +[?25h[?2026l[?2026h[?25l```ts
4511 +async append(event: SessionEvent): Promise<void> {
4512 + for (let attempt = 0; attempt < 3; attempt++) {
4513 + try {
4514 + await this.journal.write(encode(event));
4515 + return;
4516 + } catch (err) {
4517 + if (!isTransient(err)) throw err;
4518 + await delay(2 ** (2 * attempt + 1));
4519 + }
4520 + }
4521 + thi
4522 +
4523 +● Writing · 3.8s
4524 +
4525 +❯ rerun the tests the
4526 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
4527 +
4528 +
4529 +
4530 +
4531 +
4532 +
4533 +
4534 +
4535 +
4536 +
4537 + this.bus.em
4538 +
4539 +
4540 +
4541 +❯ rerun the tests then
4542 +[?25h[?2026l[?2026h[?25l
4543 +
4544 +
4545 +
4546 +
4547 +
4548 +
4549 +
4550 +
4551 +
4552 +
4553 +
4554 +
4555 +
4556 +
4557 +❯ rerun the tests then
4558 +[?25h[?2026l[?2026h[?25l
4559 +
4560 +
4561 +
4562 +
4563 +
4564 +
4565 +
4566 +
4567 +
4568 +
4569 + this.bus.emit({ typ
4570 +
4571 +
4572 +
4573 +
4574 +[?25h[?2026l[?2026h[?25l
4575 +
4576 +
4577 +
4578 +
4579 +
4580 +
4581 +
4582 +
4583 +
4584 +
4585 +
4586 +
4587 +● Writing · 3.9s
4588 +
4589 +❯ rerun the tests then v
4590 +[?25h[?2026l[?2026h[?25l
4591 +
4592 +
4593 +
4594 +
4595 +
4596 +
4597 +
4598 +
4599 +
4600 +
4601 + this.bus.emit({ type: 'Writ
4602 +
4603 +
4604 +
4605 +
4606 +[?25h[?2026l[?2026h[?25l
4607 +
4608 +
4609 +
4610 +
4611 +
4612 +
4613 +
4614 +
4615 +
4616 +
4617 +
4618 +
4619 +
4620 +
4621 +❯ rerun the tests then ve
4622 +[?25h[?2026l[?2026h[?25l
4623 +
4624 +
4625 +
4626 +
4627 +
4628 +
4629 +
4630 +
4631 +
4632 +
4633 + this.bus.emit({ type: 'WriteFailed'
4634 +
4635 +
4636 +
4637 +
4638 +[?25h[?2026l[?2026h[?25l
4639 +
4640 +
4641 +
4642 +
4643 +
4644 +
4645 +
4646 +
4647 +
4648 +
4649 + this.bus.emit({ type: 'WriteFailed', event
4650 +
4651 +
4652 +
4653 +❯ rerun the tests then ver
4654 +[?25h[?2026l[?2026h[?25l
4655 +
4656 +
4657 +
4658 +
4659 +
4660 +
4661 +
4662 +
4663 +
4664 +
4665 +
4666 +
4667 +
4668 +
4669 +
4670 +[?25h[?2026l[?2026h[?25l
4671 +
4672 +
4673 +
4674 +
4675 +
4676 +
4677 +
4678 +
4679 +
4680 +
4681 +
4682 +
4683 +● Writing · 4.0s
4684 +
4685 +❯ rerun the tests then veri
4686 +[?25h[?2026l[?2026h[?25l for (let attempt = 0; attempt < 3; attempt++) {
4687 + try {
4688 + await this.journal.write(encode(event));
4689 + return;
4690 + } catch (err) {
4691 + if (!isTransient(err)) throw err;
4692 + await delay(2 ** (2 * attempt + 1));
4693 + }
4694 + }
4695 + this.bus.emit({ type: 'WriteFailed', event });
4696 +}
4697 +``
4698 +
4699 +
4700 +
4701 +
4702 +[?25h[?2026l[?2026h[?25l
4703 +
4704 +
4705 +
4706 +
4707 +
4708 +
4709 +
4710 +
4711 +
4712 +
4713 +
4714 +
4715 +
4716 +
4717 +❯ rerun the tests then verif
4718 +[?25h[?2026l[?2026h[?25l```ts
4719 +async append(event: SessionEvent): Promise<void> {
4720 + for (let attempt = 0; attempt < 3; attempt++) {
4721 + try {
4722 + await this.journal.write(encode(event));
4723 + return;
4724 + } catch (err) {
4725 + if (!isTransient(err)) throw err;
4726 + await delay(2 ** (2 * attempt + 1));
4727 + }
4728 + }
4729 + this.bus.emit({ type: 'WriteFailed', event });
4730 +}
4731 +```
4732 +
4733 +The r
4734 +
4735 +● Writing · 4.0s
4736 +
4737 +❯ rerun the tests then verif
4738 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25lThe retry loo
4739 +
4740 +
4741 +
4742 +❯ rerun the tests then verify
4743 +[?25h[?2026l[?2026h[?25l
4744 +
4745 +
4746 +
4747 +
4748 +[?25h[?2026l[?2026h[?25l ▸ Edit src/context/engine.ts · +31 −12
4749 +The retry loop is del
4750 +
4751 +● Editing src/context/engine.ts · 0.0s
4752 +
4753 +❯ rerun the tests then verify
4754 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
4755 +
4756 +
4757 +
4758 +❯ rerun the tests then verify t
4759 +[?25h[?2026l[?2026h[?25lThe retry loop is deliberatel
4760 +
4761 +● Editing src/context/engine.ts · 0.1s
4762 +
4763 +
4764 +[?25h[?2026l[?2026h[?25lThe retry loop is deliberately synchr
4765 +
4766 +
4767 +
4768 +❯ rerun the tests then verify th
4769 +[?25h[?2026l[?2026h[?25l
4770 +
4771 +
4772 +
4773 +
4774 +[?25h[?2026l[?2026h[?25lThe retry loop is deliberately synchronous wi
4775 +
4776 +
4777 +
4778 +❯ rerun the tests then verify the
4779 +[?25h[?2026l[?2026h[?25lThe retry loop is deliberately synchronous with the e
4780 +
4781 +
4782 +
4783 +❯ rerun the tests then verify the
4784 +[?25h[?2026l[?2026h[?25l
4785 +
4786 +● Editing src/context/engine.ts · 0.2s
4787 +
4788 +❯ rerun the tests then verify the j
4789 +[?25h[?2026l[?2026h[?25lThe retry loop is deliberately synchronous with the event bus
4790 +
4791 +
4792 +
4793 +
4794 +[?25h[?2026l[?2026h[?25lThe retry loop is deliberately synchronous with the event bus:
4795 +observ
4796 +
4797 +● Editing src/context/engine.ts · 0.2s
4798 +
4799 +❯ rerun the tests then verify the j
4800 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
4801 +
4802 +
4803 +
4804 +
4805 +❯ rerun the tests then verify the jo
4806 +[?25h[?2026l[?2026h[?25l
4807 +observations s
4808 +
4809 +
4810 +
4811 +❯ rerun the tests then verify the jou
4812 +[?25h[?2026l[?2026h[?25l
4813 +observations settle in
4814 +
4815 +● Editing src/context/engine.ts · 0.3s
4816 +
4817 +❯ rerun the tests then verify the jour
4818 +[?25h[?2026l[?2026h[?25l
4819 +
4820 +
4821 +
4822 +
4823 +
4824 +[?25h[?2026l[?2026h[?25l
4825 +observations settle in order,
4826 +
4827 +
4828 +
4829 +❯ rerun the tests then verify the journ
4830 +[?25h[?2026l[?2026h[?25l
4831 +observations settle in order, and the
4832 +
4833 +
4834 +
4835 +❯ rerun the tests then verify the journa
4836 +[?25h[?2026l[?2026h[?25l
4837 +
4838 +
4839 +● Editing src/context/engine.ts · 0.4s
4840 +
4841 +❯ rerun the tests then verify the journal
4842 +[?25h[?2026l[?2026h[?25l
4843 +observations settle in order, and the live reg
4844 +
4845 +
4846 +
4847 +
4848 +[?25h[?2026l[?2026h[?25l
4849 +
4850 +
4851 +
4852 +
4853 +❯ rerun the tests then verify the journal
4854 +[?25h[?2026l[?2026h[?25l
4855 +observations settle in order, and the live region neve
4856 +
4857 +
4858 +
4859 +
4860 +[?25h[?2026l[?2026h[?25l
4861 +❯ rerun the tests then verify the journal
4862 +
4863 +The retry loop is deliberately synchronous with the event bus:
4864 +observations settle in order, and the live region never shows
4865 +
4866 +● Editing src/context/engine.ts · 0.4s
4867 +
4868 +❯
4869 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
4870 +
4871 +
4872 +
4873 +
4874 +❯ c
4875 +[?25h[?2026l[?2026h[?25lThe retry loop is deliberately synchronous with the event bus:
4876 +observations settle in order, and the live region never shows a
4877 +frame
4878 +
4879 +● Editing src/context/engine.ts · 0.5s
4880 +
4881 +❯ c
4882 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
4883 +
4884 +
4885 +
4886 +
4887 +
4888 +❯ ch
4889 +[?25h[?2026l[?2026h[?25l
4890 +
4891 +
4892 +
4893 +
4894 +
4895 +
4896 +[?25h[?2026l[?2026h[?25l
4897 +
4898 +frame that the
4899 +
4900 +
4901 +
4902 +
4903 +[?25h[?2026l[?2026h[?25l
4904 +
4905 +
4906 +
4907 +
4908 +
4909 +❯ che
4910 +[?25h[?2026l[?2026h[?25l
4911 +
4912 +frame that the journal
4913 +
4914 +
4915 +
4916 +
4917 +[?25h[?2026l[?2026h[?25l
4918 +
4919 +
4920 +
4921 +
4922 +
4923 +❯ chec
4924 +[?25h[?2026l[?2026h[?25l
4925 +
4926 +frame that the journal has not
4927 +
4928 +● Editing src/context/engine.ts · 0.6s
4929 +
4930 +
4931 +[?25h[?2026l[?2026h[?25l
4932 +
4933 +
4934 +
4935 +
4936 +
4937 +❯ check
4938 +[?25h[?2026l[?2026h[?25l
4939 +
4940 +
4941 +
4942 +
4943 +
4944 +
4945 +[?25h[?2026l[?2026h[?25l
4946 +
4947 +
4948 +
4949 +
4950 +
4951 +❯ check
4952 +[?25h[?2026l[?2026h[?25l
4953 +
4954 +frame that the journal has not accepte
4955 +
4956 +
4957 +
4958 +
4959 +[?25h[?2026l[?2026h[?25l
4960 +
4961 +frame that the journal has not accepted. Inter
4962 +
4963 +
4964 +
4965 +❯ check t
4966 +[?25h[?2026l[?2026h[?25l
4967 +
4968 +frame that the journal has not accepted. Interruption
4969 +
4970 +● Editing src/context/engine.ts · 0.7s
4971 +
4972 +
4973 +[?25h[?2026l[?2026h[?25l
4974 +
4975 +
4976 +
4977 +
4978 +
4979 +❯ check th
4980 +[?25h[?2026l[?2026h[?25l
4981 +
4982 +
4983 +
4984 +
4985 +
4986 +
4987 +[?25h[?2026l[?2026h[?25lThe retry loop is deliberately synchronous with the event bus:
4988 +observations settle in order, and the live region never shows a
4989 +frame that the journal has not accepted. Interruption is safe
4990 +
4991 +
4992 +● Editing src/context/engine.ts · 0.7s
4993 +
4994 +❯ check th
4995 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
4996 +
4997 +
4998 +
4999 +
5000 +
5001 +
5002 +❯ check the
5003 +[?25h[?2026l[?2026h[?25l
5004 +
5005 +
5006 +because
5007 +
5008 +
5009 +
5010 +
5011 +[?25h[?2026l[?2026h[?25l
5012 +
5013 +
5014 +
5015 +
5016 +
5017 +
5018 +❯ check the
5019 +[?25h[?2026l[?2026h[?25l
5020 +
5021 +
5022 +because a cancel
5023 +
5024 +● Editing src/context/engine.ts · 0.8s
5025 +
5026 +
5027 +[?25h[?2026l[?2026h[?25l
5028 +
5029 +
5030 +
5031 +
5032 +
5033 +
5034 +❯ check the s
5035 +[?25h[?2026l[?2026h[?25l
5036 +
5037 +
5038 +
5039 +
5040 +
5041 +
5042 +
5043 +[?25h[?2026l[?2026h[?25l
5044 +
5045 +
5046 +because a cancelled writ
5047 +
5048 +
5049 +
5050 +
5051 +[?25h[?2026l[?2026h[?25l
5052 +
5053 +
5054 +
5055 +
5056 +
5057 +
5058 +❯ check the se
5059 +[?25h[?2026l[?2026h[?25l
5060 +
5061 +
5062 +because a cancelled write is ind
5063 +
5064 +
5065 +
5066 +
5067 +[?25h[?2026l[?2026h[?25l
5068 +
5069 +
5070 +
5071 +
5072 +
5073 +
5074 +❯ check the ses
5075 +[?25h[?2026l[?2026h[?25l
5076 +
5077 +
5078 +because a cancelled write is indistingui
5079 +
5080 +● Editing src/context/engine.ts · 0.9s
5081 +
5082 +
5083 +[?25h[?2026l[?2026h[?25l
5084 +
5085 +
5086 +
5087 +
5088 +
5089 +
5090 +❯ check the sess
5091 +[?25h[?2026l[?2026h[?25l
5092 +
5093 +
5094 +
5095 +
5096 +
5097 +
5098 +
5099 +[?25h[?2026l[?2026h[?25l
5100 +
5101 +
5102 +because a cancelled write is indistinguishable f
5103 +
5104 +
5105 +
5106 +
5107 +[?25h[?2026l[?2026h[?25l
5108 +
5109 +
5110 +
5111 +
5112 +
5113 +
5114 +❯ check the sessi
5115 +[?25h[?2026l[?2026h[?25l
5116 +
5117 +
5118 +because a cancelled write is indistinguishable from a wr
5119 +
5120 +
5121 +
5122 +❯ check the sessio
5123 +[?25h[?2026l[?2026h[?25l
5124 +
5125 +
5126 +because a cancelled write is indistinguishable from a write that
5127 +
5128 +● Editing src/context/engine.ts · 1.0s
5129 +
5130 +❯ check the session
5131 +[?25h[?2026l[?2026h[?25l
5132 +
5133 +
5134 +
5135 +
5136 +
5137 +
5138 +
5139 +[?25h[?2026l[?2026h[?25lThe retry loop is deliberately synchronous with the event bus:
5140 +observations settle in order, and the live region never shows a
5141 +frame that the journal has not accepted. Interruption is safe
5142 +because a cancelled write is indistinguishable from a write that
5143 +never s
5144 +
5145 +● Editing src/context/engine.ts · 1.0s
5146 +
5147 +❯ check the session
5148 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
5149 +
5150 +
5151 +
5152 +
5153 +
5154 +● Editing src/context/engine.ts · 1.1s
5155 +
5156 +❯ check the session s
5157 +[?25h[?2026l[?2026h[?25l
5158 +
5159 +
5160 +
5161 +never started —
5162 +
5163 +
5164 +
5165 +
5166 +[?25h[?2026l[?2026h[?25l
5167 +
5168 +
5169 +
5170 +never started — the jou
5171 +
5172 +
5173 +
5174 +❯ check the session st
5175 +[?25h[?2026l[?2026h[?25l
5176 +
5177 +
5178 +
5179 +
5180 +
5181 +
5182 +
5183 +
5184 +[?25h[?2026l[?2026h[?25l
5185 +
5186 +
5187 +
5188 +never started — the journal eit
5189 +
5190 +
5191 +
5192 +❯ check the session sto
5193 +[?25h[?2026l[?2026h[?25l
5194 +
5195 +
5196 +
5197 +never started — the journal either has
5198 +
5199 +● Editing src/context/engine.ts · 1.2s
5200 +
5201 +❯ check the session stor
5202 +[?25h[?2026l[?2026h[?25l
5203 +
5204 +
5205 +
5206 +never started — the journal either has the full
5207 +
5208 +
5209 +
5210 +❯ check the session store
5211 +[?25h[?2026l[?2026h[?25l
5212 +
5213 +
5214 +
5215 +
5216 +
5217 +
5218 +
5219 +
5220 +[?25h[?2026l[?2026h[?25l
5221 +
5222 +
5223 +
5224 +never started — the journal either has the full event o
5225 +
5226 +
5227 +
5228 +❯ check the session store
5229 +[?25h[?2026l[?2026h[?25l
5230 +
5231 +
5232 +
5233 +never started — the journal either has the full event or nothin
5234 +
5235 +● Editing src/context/engine.ts · 1.3s
5236 +
5237 +❯ check the session store r
5238 +[?25h[?2026l[?2026h[?25l
5239 +
5240 +
5241 +
5242 +
5243 +
5244 +
5245 +
5246 +❯ check the session store re
5247 +[?25h[?2026l[?2026h[?25lThe retry loop is deliberately synchronous with the event bus:
5248 +observations settle in order, and the live region never shows a
5249 +frame that the journal has not accepted. Interruption is safe
5250 +because a cancelled write is indistinguishable from a write that
5251 +never started — the journal either has the full event or nothing.
5252 +
5253 +Two
5254 +
5255 +● Editing src/context/engine.ts · 1.3s
5256 +
5257 +❯ check the session store re
5258 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
5259 +
5260 +
5261 +
5262 +❯ check the session store ret
5263 +[?25h[?2026l[?2026h[?25lTwo details
5264 +
5265 +
5266 +
5267 +
5268 +[?25h[?2026l[?2026h[?25lTwo details worth ca
5269 +
5270 +● Editing src/context/engine.ts · 1.4s
5271 +
5272 +❯ check the session store retr
5273 +[?25h[?2026l[?2026h[?25l
5274 +
5275 +
5276 +
5277 +❯ check the session store retry
5278 +[?25h[?2026l[?2026h[?25lTwo details worth calling ou
5279 +
5280 +
5281 +
5282 +
5283 +[?25h[?2026l[?2026h[?25l
5284 +
5285 +
5286 +
5287 +❯ check the session store retry
5288 +[?25h[?2026l[?2026h[?25lTwo details worth calling out for re
5289 +
5290 +
5291 +
5292 +
5293 +[?25h[?2026l[?2026h[?25l
5294 +
5295 +● Editing src/context/engine.ts · 1.5s
5296 +
5297 +❯ check the session store retry l
5298 +[?25h[?2026l[?2026h[?25lTwo details worth calling out for review:
5299 +
5300 +1
5301 +
5302 +● Editing src/context/engine.ts · 1.5s
5303 +
5304 +❯ check the session store retry l
5305 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l1. `isTra
5306 +
5307 +
5308 +
5309 +❯ check the session store retry lo
5310 +[?25h[?2026l[?2026h[?25l
5311 +
5312 +
5313 +
5314 +
5315 +[?25h[?2026l[?2026h[?25l1. `isTransient`
5316 +
5317 +
5318 +
5319 +❯ check the session store retry log
5320 +[?25h[?2026l[?2026h[?25l1. `isTransient` treats `
5321 +
5322 +● Editing src/context/engine.ts · 1.6s
5323 +
5324 +❯ check the session store retry logi
5325 +[?25h[?2026l[?2026h[?25l
5326 +
5327 +
5328 +
5329 +❯ check the session store retry logic
5330 +[?25h[?2026l[?2026h[?25l1. `isTransient` treats `EAGAIN`,
5331 +
5332 +
5333 +
5334 +
5335 +[?25h[?2026l[?2026h[?25l
5336 +
5337 +
5338 +
5339 +❯ check the session store retry logic
5340 +[?25h[?2026l[?2026h[?25l1. `isTransient` treats `EAGAIN`, `EBUSY`
5341 +
5342 +
5343 +
5344 +
5345 +[?25h[?2026l[?2026h[?25l
5346 +
5347 +● Editing src/context/engine.ts · 1.7s
5348 +
5349 +❯ check the session store retry logic a
5350 +[?25h[?2026l[?2026h[?25l1. `isTransient` treats `EAGAIN`, `EBUSY` and `EI
5351 +
5352 +
5353 +
5354 +
5355 +[?25h[?2026l[?2026h[?25l1. `isTransient` treats `EAGAIN`, `EBUSY` and `EINTR` as
5356 +
5357 +
5358 +
5359 +
5360 +[?25h[?2026l[?2026h[?25l
5361 +
5362 +
5363 +
5364 +❯ check the session store retry logic an
5365 +[?25h[?2026l[?2026h[?25l
5366 +
5367 +
5368 +
5369 +
5370 +[?25h[?2026l[?2026h[?25l
5371 +
5372 +
5373 +
5374 +❯ check the session store retry logic and
5375 +[?25h[?2026l[?2026h[?25l1. `isTransient` treats `EAGAIN`, `EBUSY` and `EINTR` as retryabl
5376 +
5377 +
5378 +
5379 +
5380 +[?25h[?2026l[?2026h[?25l1. `isTransient` treats `EAGAIN`, `EBUSY` and `EINTR` as retryable
5381 +2. the
5382 +
5383 +● Editing src/context/engine.ts · 1.8s
5384 +
5385 +❯ check the session store retry logic and
5386 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
5387 +❯ check the session store retry logic and
5388 +
5389 +1. `isTransient` treats `EAGAIN`, `EBUSY` and `EINTR` as retryable
5390 +2. the
5391 +
5392 +● Editing src/context/engine.ts · 1.8s
5393 +
5394 +❯
5395 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
5396 +2. the backoff
5397 +
5398 +
5399 +
5400 +❯ r
5401 +[?25h[?2026l[?2026h[?25l
5402 +
5403 +
5404 +
5405 +
5406 +
5407 +[?25h[?2026l[?2026h[?25l
5408 +
5409 +
5410 +
5411 +
5412 +❯ re
5413 +[?25h[?2026l[?2026h[?25l
5414 +2. the backoff delays
5415 +
5416 +
5417 +
5418 +
5419 +[?25h[?2026l[?2026h[?25l
5420 +2. the backoff delays are cumu
5421 +
5422 +● Editing src/context/engine.ts · 1.9s
5423 +
5424 +❯ rer
5425 +[?25h[?2026l[?2026h[?25l
5426 +2. the backoff delays are cumulative w
5427 +
5428 +
5429 +
5430 +❯ reru
5431 +[?25h[?2026l[?2026h[?25l
5432 +
5433 +
5434 +
5435 +
5436 +
5437 +[?25h[?2026l[?2026h[?25l
5438 +2. the backoff delays are cumulative worst-cas
5439 +
5440 +
5441 +
5442 +❯ rerun
5443 +[?25h[?2026l[?2026h[?25l
5444 +2. the backoff delays are cumulative worst-case 42 ms,
5445 +
5446 +● Editing src/context/engine.ts · 2.0s
5447 +
5448 +❯ rerun
5449 +[?25h[?2026l[?2026h[?25l
5450 +2. the backoff delays are cumulative worst-case 42 ms, well un
5451 +
5452 +
5453 +
5454 +❯ rerun t
5455 +[?25h[?2026l[?2026h[?25l
5456 +
5457 +
5458 +
5459 +
5460 +
5461 +[?25h[?2026l[?2026h[?25l1. `isTransient` treats `EAGAIN`, `EBUSY` and `EINTR` as retryable
5462 +2. the backoff delays are cumulative worst-case 42 ms, well under
5463 + t
5464 +
5465 +● Editing src/context/engine.ts · 2.0s
5466 +
5467 +❯ rerun th
5468 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
5469 +
5470 + the 100 m
5471 +
5472 +● Editing src/context/engine.ts · 2.1s
5473 +
5474 +❯ rerun the
5475 +[?25h[?2026l[?2026h[?25l
5476 +
5477 + the 100 ms budget
5478 +
5479 +
5480 +
5481 +❯ rerun the
5482 +[?25h[?2026l[?2026h[?25l
5483 +
5484 +
5485 +
5486 +
5487 +
5488 +
5489 +[?25h[?2026l[?2026h[?25l
5490 +
5491 + the 100 ms budget for a s
5492 +
5493 +
5494 +
5495 +
5496 +[?25h[?2026l[?2026h[?25l
5497 +
5498 +
5499 +
5500 +
5501 +
5502 +❯ rerun the t
5503 +[?25h[?2026l[?2026h[?25l
5504 +
5505 + the 100 ms budget for a settled-e
5506 +
5507 +● Editing src/context/engine.ts · 2.2s
5508 +
5509 +
5510 +[?25h[?2026l[?2026h[?25l
5511 +
5512 +
5513 +
5514 +
5515 +
5516 +❯ rerun the te
5517 +[?25h[?2026l[?2026h[?25l
5518 +
5519 + the 100 ms budget for a settled-event flu
5520 +
5521 +
5522 +
5523 +
5524 +[?25h[?2026l[?2026h[?25l
5525 +
5526 +
5527 +
5528 +
5529 +
5530 +❯ rerun the tes
5531 +[?25h[?2026l[?2026h[?25l
5532 +
5533 +
5534 +
5535 +
5536 +
5537 +
5538 +[?25h[?2026l[?2026h[?25l1. `isTransient` treats `EAGAIN`, `EBUSY` and `EINTR` as retryable
5539 +2. the backoff delays are cumulative worst-case 42 ms, well under
5540 + the 100 ms budget for a settled-event flush
5541 +
5542 +With
5543 +
5544 +● Editing src/context/engine.ts · 2.2s
5545 +
5546 +❯ rerun the test
5547 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25lWith this in
5548 +
5549 +● Editing src/context/engine.ts · 2.3s
5550 +
5551 +❯ rerun the tests
5552 +[?25h[?2026l[?2026h[?25lWith this in place t
5553 +
5554 +
5555 +
5556 +❯ rerun the tests
5557 +[?25h[?2026l[?2026h[?25l
5558 +
5559 +
5560 +
5561 +
5562 +[?25h[?2026l[?2026h[?25lWith this in place the flaky
5563 +
5564 +
5565 +
5566 +
5567 +[?25h[?2026l[?2026h[?25l
5568 +
5569 +
5570 +
5571 +❯ rerun the tests t
5572 +[?25h[?2026l[?2026h[?25lWith this in place the flaky `store.
5573 +
5574 +● Editing src/context/engine.ts · 2.4s
5575 +
5576 +❯ rerun the tests th
5577 +[?25h[?2026l[?2026h[?25lWith this in place the flaky `store.test.ts`
5578 +
5579 +
5580 +
5581 +❯ rerun the tests the
5582 +[?25h[?2026l[?2026h[?25l
5583 +
5584 +
5585 +
5586 +
5587 +[?25h[?2026l[?2026h[?25l
5588 +
5589 +
5590 +
5591 +❯ rerun the tests then
5592 +[?25h[?2026l[?2026h[?25lWith this in place the flaky `store.test.ts` failure
5593 +
5594 +● Editing src/context/engine.ts · 2.5s
5595 +
5596 +
5597 +[?25h[?2026l[?2026h[?25lWith this in place the flaky `store.test.ts` failures stop
5598 +r
5599 +
5600 +● Editing src/context/engine.ts · 2.5s
5601 +
5602 +❯ rerun the tests then
5603 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
5604 +reproduci
5605 +
5606 +
5607 +
5608 +
5609 +[?25h[?2026l[?2026h[?25l
5610 +
5611 +
5612 +
5613 +
5614 +❯ rerun the tests then v
5615 +[?25h[?2026l[?2026h[?25l
5616 +
5617 +
5618 +
5619 +
5620 +
5621 +[?25h[?2026l[?2026h[?25l
5622 +reproducing under
5623 +
5624 +
5625 +
5626 +❯ rerun the tests then ve
5627 +[?25h[?2026l[?2026h[?25l
5628 +reproducing under load, a
5629 +
5630 +● Editing src/context/engine.ts · 2.6s
5631 +
5632 +
5633 +[?25h[?2026l[?2026h[?25l
5634 +
5635 +
5636 +
5637 +
5638 +❯ rerun the tests then ver
5639 +[?25h[?2026l[?2026h[?25l
5640 +reproducing under load, and the a
5641 +
5642 +
5643 +
5644 +❯ rerun the tests then veri
5645 +[?25h[?2026l[?2026h[?25l
5646 +
5647 +
5648 +
5649 +
5650 +
5651 +[?25h[?2026l[?2026h[?25l
5652 +reproducing under load, and the append pa
5653 +
5654 +
5655 +
5656 +❯ rerun the tests then verif
5657 +[?25h[?2026l[?2026h[?25l
5658 +reproducing under load, and the append path stays
5659 +
5660 +● Editing src/context/engine.ts · 2.7s
5661 +
5662 +❯ rerun the tests then verify
5663 +[?25h[?2026l[?2026h[?25l
5664 +
5665 +
5666 +
5667 +
5668 +❯ rerun the tests then verify
5669 +[?25h[?2026l[?2026h[?25l
5670 +reproducing under load, and the append path stays inside
5671 +
5672 +
5673 +
5674 +
5675 +[?25h[?2026l[?2026h[?25lWith this in place the flaky `store.test.ts` failures stop
5676 +reproducing under load, and the append path stays inside the hot
5677 +
5678 +
5679 +● Editing src/context/engine.ts · 2.7s
5680 +
5681 +❯ rerun the tests then verify t
5682 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
5683 +
5684 +loop bud
5685 +
5686 +● Editing src/context/engine.ts · 2.8s
5687 +
5688 +❯ rerun the tests then verify th
5689 +[?25h[?2026l[?2026h[?25l
5690 +
5691 +loop budget. The
5692 +
5693 +
5694 +
5695 +❯ rerun the tests then verify the
5696 +[?25h[?2026l[?2026h[?25l
5697 +
5698 +loop budget. The remaini
5699 +
5700 +
5701 +
5702 +❯ rerun the tests then verify the
5703 +[?25h[?2026l[?2026h[?25l
5704 +
5705 +loop budget. The remaining work
5706 +
5707 +● Editing src/context/engine.ts · 2.9s
5708 +
5709 +❯ rerun the tests then verify the j
5710 +[?25h[?2026l[?2026h[?25l
5711 +
5712 +loop budget. The remaining work is to su
5713 +
5714 +
5715 +
5716 +❯ rerun the tests then verify the jo
5717 +[?25h[?2026l[?2026h[?25l
5718 +
5719 +
5720 +
5721 +
5722 +
5723 +❯ rerun the tests then verify the jou
5724 +[?25h[?2026l[?2026h[?25l
5725 +
5726 +loop budget. The remaining work is to surface `W
5727 +
5728 +● Editing src/context/engine.ts · 3.0s
5729 +
5730 +
5731 +[?25h[?2026l[?2026h[?25l
5732 +
5733 +
5734 +
5735 +
5736 +
5737 +❯ rerun the tests then verify the jour
5738 +[?25h[?2026l[?2026h[?25l
5739 +
5740 +loop budget. The remaining work is to surface `WriteFail
5741 +
5742 +
5743 +
5744 +
5745 +[?25h[?2026l[?2026h[?25l
5746 +
5747 +
5748 +
5749 +
5750 +
5751 +❯ rerun the tests then verify the journ
5752 +[?25h[?2026l[?2026h[?25lWith this in place the flaky `store.test.ts` failures stop
5753 +reproducing under load, and the append path stays inside the hot
5754 +loop budget. The remaining work is to surface `WriteFailed` in
5755 +t
5756 +
5757 +● Editing src/context/engine.ts · 3.0s
5758 +
5759 +❯ rerun the tests then verify the journ
5760 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
5761 +
5762 +
5763 +
5764 +
5765 +
5766 +
5767 +❯ rerun the tests then verify the journa
5768 +[?25h[?2026l[?2026h[?25l
5769 +
5770 +
5771 +the statu
5772 +
5773 +● Editing src/context/engine.ts · 3.1s
5774 +
5775 +
5776 +[?25h[?2026l[?2026h[?25l
5777 +
5778 +
5779 +
5780 +
5781 +
5782 +
5783 +❯ rerun the tests then verify the journal
5784 +[?25h[?2026l[?2026h[?25l
5785 +
5786 +
5787 +the status bar so
5788 +
5789 +
5790 +
5791 +
5792 +[?25h[?2026l[?2026h[?25l
5793 +
5794 +
5795 +the status bar so a dying
5796 +
5797 +
5798 +
5799 +❯ rerun the tests then verify the journal
5800 +[?25h[?2026l[?2026h[?25l
5801 +❯ rerun the tests then verify the journal
5802 +
5803 +With this in place the flaky `store.test.ts` failures stop
5804 +reproducing under load, and the append path stays inside the hot
5805 +loop budget. The remaining work is to surface `WriteFailed` in
5806 +the status bar so a dying disk is
5807 +
5808 +● Editing src/context/engine.ts · 3.1s
5809 +
5810 +❯
5811 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
5812 +
5813 +
5814 +
5815 +
5816 +
5817 +
5818 +❯ c
5819 +[?25h[?2026l[?2026h[?25l
5820 +
5821 +
5822 +the status bar so a dying disk is visible
5823 +
5824 +● Editing src/context/engine.ts · 3.2s
5825 +
5826 +❯ ch
5827 +[?25h[?2026l[?2026h[?25l
5828 +
5829 +
5830 +the status bar so a dying disk is visible before
5831 +
5832 +
5833 +
5834 +❯ che
5835 +[?25h[?2026l[?2026h[?25l
5836 +
5837 +
5838 +the status bar so a dying disk is visible before data is
5839 +
5840 +
5841 +
5842 +❯ chec
5843 +[?25h[?2026l[?2026h[?25lWith this in place the flaky `store.test.ts` failures stop
5844 +reproducing under load, and the append path stays inside the hot
5845 +loop budget. The remaining work is to surface `WriteFailed` in
5846 +the status bar so a dying disk is visible before data is lost.
5847 +
5848 +
5849 +● Editing src/context/engine.ts · 3.3s
5850 +
5851 +❯ check
5852 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25lWith this in place the flaky `store.test.ts` failures stop
5853 +reproducing under load, and the append path stays inside the hot
5854 +loop budget. The remaining work is to surface `WriteFailed` in
5855 +the status bar so a dying disk is visible before data is lost.
5856 +
5857 + ▸ Run npm test · passed · 4.2s
5858 +
5859 +❯ check
5860 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l ❯ check
5861 +[?25h[?2026l[?2026h[?25l ❯ check t
5862 +[?25h[?2026l[?2026h[?25l ❯ check th
5863 +[?25h[?2026l[?2026h[?25l ❯ check the
5864 +[?25h[?2026l[?2026h[?25l ❯ check the
5865 +[?25h[?2026l[?2026h[?25l ❯ check the s
5866 +[?25h[?2026l[?2026h[?25l ❯ check the se
5867 +[?25h[?2026l[?2026h[?25l ❯ check the ses
5868 +[?25h[?2026l[?2026h[?25l ❯ check the sess
5869 +[?25h[?2026l[?2026h[?25l ❯ check the sessi
5870 +[?25h[?2026l[?2026h[?25l ❯ check the sessio
5871 +[?25h[?2026l[?2026h[?25l ❯ check the session
5872 +[?25h[?2026l[?2026h[?25l ❯ check the session
5873 +[?25h[?2026l[?2026h[?25l ❯ check the session s
5874 +[?25h[?2026l[?2026h[?25l ❯ check the session st
5875 +[?25h[?2026l[?2026h[?25l ❯ check the session sto
5876 +[?25h[?2026l[?2026h[?25l ❯ check the session stor
5877 +[?25h[?2026l[?2026h[?25l ❯ check the session store
5878 +[?25h[?2026l[?2026h[?25l ❯ check the session store
5879 +[?25h[?2026l[?2026h[?25l ❯ check the session store r
5880 +[?25h[?2026l[?2026h[?25l ❯ check the session store re
5881 +[?25h[?2026l[?2026h[?25l ● Reading src/session/store.ts · 0.0s
5882 +
5883 +❯ check the session store re
5884 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
5885 +
5886 +❯ check the session store ret
5887 +[?25h[?2026l[?2026h[?25l
5888 +
5889 +❯ check the session store retr
5890 +[?25h[?2026l[?2026h[?25l● Reading src/session/store.ts · 0.1s
5891 +
5892 +❯ check the session store retry
5893 +[?25h[?2026l[?2026h[?25l
5894 +
5895 +
5896 +[?25h[?2026l[?2026h[?25l
5897 +
5898 +❯ check the session store retry
5899 +[?25h[?2026l[?2026h[?25l
5900 +
5901 +❯ check the session store retry l
5902 +[?25h[?2026l[?2026h[?25l● Reading src/session/store.ts · 0.2s
5903 +
5904 +❯ check the session store retry lo
5905 +[?25h[?2026l[?2026h[?25l
5906 +
5907 +
5908 +[?25h[?2026l[?2026h[?25l
5909 +
5910 +❯ check the session store retry log
5911 +[?25h[?2026l[?2026h[?25l
5912 +
5913 +❯ check the session store retry logi
5914 +[?25h[?2026l[?2026h[?25l● Reading src/session/store.ts · 0.3s
5915 +
5916 +❯ check the session store retry logic
5917 +[?25h[?2026l[?2026h[?25l
5918 +
5919 +
5920 +[?25h[?2026l[?2026h[?25l
5921 +
5922 +❯ check the session store retry logic
5923 +[?25h[?2026l[?2026h[?25l
5924 +
5925 +❯ check the session store retry logic a
5926 +[?25h[?2026l[?2026h[?25l● Reading src/session/store.ts · 0.4s
5927 +
5928 +❯ check the session store retry logic an
5929 +[?25h[?2026l[?2026h[?25l
5930 +
5931 +
5932 +[?25h[?2026l[?2026h[?25l
5933 +
5934 +❯ check the session store retry logic and
5935 +[?25h[?2026l[?2026h[?25l
5936 +
5937 +❯ check the session store retry logic and
5938 +[?25h[?2026l[?2026h[?25l
5939 +❯ check the session store retry logic and
5940 +
5941 +● Reading src/session/store.ts · 0.5s
5942 +
5943 +❯
5944 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
5945 +
5946 +❯ r
5947 +[?25h[?2026l[?2026h[?25l ▸ Read src/session/store.ts · 212 lines
5948 +● Reading src/session/store.ts · 0.5s
5949 +
5950 +❯ r
5951 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
5952 +
5953 +❯ re
5954 +[?25h[?2026l[?2026h[?25l● Reading src/session/store.ts · 0.6s
5955 +
5956 +❯ rer
5957 +[?25h[?2026l[?2026h[?25l
5958 +
5959 +❯ reru
5960 +[?25h[?2026l[?2026h[?25l
5961 +
5962 +
5963 +[?25h[?2026l[?2026h[?25l
5964 +
5965 +❯ rerun
5966 +[?25h[?2026l[?2026h[?25l● Reading src/session/store.ts · 0.7s
5967 +
5968 +❯ rerun
5969 +[?25h[?2026l[?2026h[?25l
5970 +
5971 +❯ rerun t
5972 +[?25h[?2026l[?2026h[?25l
5973 +
5974 +
5975 +[?25h[?2026l[?2026h[?25l
5976 +
5977 +❯ rerun th
5978 +[?25h[?2026l[?2026h[?25l ▸ Search "retry" · 6 matches
5979 +● Thinking · 0.0s
5980 +
5981 +❯ rerun the
5982 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
5983 +
5984 +❯ rerun the
5985 +[?25h[?2026l[?2026h[?25l● Thinking · 0.1s
5986 +
5987 +
5988 +[?25h[?2026l[?2026h[?25l
5989 +
5990 +❯ rerun the t
5991 +[?25h[?2026l[?2026h[?25l
5992 +
5993 +❯ rerun the te
5994 +[?25h[?2026l[?2026h[?25l
5995 +
5996 +❯ rerun the tes
5997 +[?25h[?2026l[?2026h[?25l● Thinking · 0.2s
5998 +
5999 +
6000 +[?25h[?2026l[?2026h[?25l
6001 +
6002 +❯ rerun the test
6003 +[?25h[?2026l[?2026h[?25l
6004 +
6005 +❯ rerun the tests
6006 +[?25h[?2026l[?2026h[?25l
6007 +
6008 +❯ rerun the tests
6009 +[?25h[?2026l[?2026h[?25l● Thinking · 0.3s
6010 +
6011 +
6012 +[?25h[?2026l[?2026h[?25l
6013 +
6014 +❯ rerun the tests t
6015 +[?25h[?2026l[?2026h[?25l
6016 +
6017 +❯ rerun the tests th
6018 +[?25h[?2026l[?2026h[?25l
6019 +
6020 +❯ rerun the tests the
6021 +[?25h[?2026l[?2026h[?25l● Thinking · 0.4s
6022 +
6023 +
6024 +[?25h[?2026l[?2026h[?25l
6025 +
6026 +❯ rerun the tests then
6027 +[?25h[?2026l[?2026h[?25l## Sessi
6028 +
6029 +● Writing · 0.0s
6030 +
6031 +❯ rerun the tests then
6032 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
6033 +
6034 +
6035 +
6036 +❯ rerun the tests then
6037 +[?25h[?2026l[?2026h[?25l## Session store
6038 +
6039 +
6040 +
6041 +
6042 +[?25h[?2026l[?2026h[?25l
6043 +
6044 +
6045 +
6046 +❯ rerun the tests then v
6047 +[?25h[?2026l[?2026h[?25l
6048 +
6049 +● Writing · 0.1s
6050 +
6051 +
6052 +[?25h[?2026l[?2026h[?25l## Session store retry l
6053 +
6054 +
6055 +
6056 +❯ rerun the tests then ve
6057 +[?25h[?2026l[?2026h[?25l## Session store retry logic
6058 +
6059 +Th
6060 +
6061 +● Writing · 0.1s
6062 +
6063 +❯ rerun the tests then ve
6064 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
6065 +
6066 +
6067 +
6068 +❯ rerun the tests then ver
6069 +[?25h[?2026l[?2026h[?25lThe failur
6070 +
6071 +
6072 +
6073 +
6074 +[?25h[?2026l[?2026h[?25l
6075 +
6076 +
6077 +
6078 +❯ rerun the tests then veri
6079 +[?25h[?2026l[?2026h[?25l
6080 +
6081 +● Writing · 0.2s
6082 +
6083 +
6084 +[?25h[?2026l[?2026h[?25lThe failure point
6085 +
6086 +
6087 +
6088 +❯ rerun the tests then verif
6089 +[?25h[?2026l[?2026h[?25lThe failure point is in `S
6090 +
6091 +
6092 +
6093 +
6094 +[?25h[?2026l[?2026h[?25l
6095 +
6096 +
6097 +
6098 +❯ rerun the tests then verify
6099 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionSt
6100 +
6101 +
6102 +
6103 +❯ rerun the tests then verify
6104 +[?25h[?2026l[?2026h[?25l
6105 +
6106 +● Writing · 0.3s
6107 +
6108 +
6109 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.appe
6110 +
6111 +
6112 +
6113 +❯ rerun the tests then verify t
6114 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.append` — jo
6115 +
6116 +
6117 +
6118 +
6119 +[?25h[?2026l[?2026h[?25l
6120 +
6121 +
6122 +
6123 +❯ rerun the tests then verify th
6124 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.append` — journal wr
6125 +
6126 +
6127 +
6128 +
6129 +[?25h[?2026l[?2026h[?25l
6130 +
6131 +
6132 +
6133 +❯ rerun the tests then verify the
6134 +[?25h[?2026l[?2026h[?25l
6135 +
6136 +● Writing · 0.4s
6137 +
6138 +
6139 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.append` — journal writes are
6140 +
6141 +
6142 +
6143 +❯ rerun the tests then verify the
6144 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.append` — journal writes are
6145 +not ret
6146 +
6147 +● Writing · 0.4s
6148 +
6149 +❯ rerun the tests then verify the
6150 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
6151 +
6152 +
6153 +
6154 +
6155 +❯ rerun the tests then verify the j
6156 +[?25h[?2026l[?2026h[?25l
6157 +not retried on
6158 +
6159 +
6160 +
6161 +❯ rerun the tests then verify the jo
6162 +[?25h[?2026l[?2026h[?25l
6163 +
6164 +
6165 +● Writing · 0.5s
6166 +
6167 +
6168 +[?25h[?2026l[?2026h[?25l
6169 +not retried on transien
6170 +
6171 +
6172 +
6173 +❯ rerun the tests then verify the jou
6174 +[?25h[?2026l[?2026h[?25l
6175 +not retried on transient `EAGAI
6176 +
6177 +
6178 +
6179 +❯ rerun the tests then verify the jour
6180 +[?25h[?2026l[?2026h[?25l
6181 +not retried on transient `EAGAIN`, so a
6182 +
6183 +
6184 +
6185 +❯ rerun the tests then verify the journ
6186 +[?25h[?2026l[?2026h[?25l
6187 +
6188 +
6189 +● Writing · 0.6s
6190 +
6191 +
6192 +[?25h[?2026l[?2026h[?25l
6193 +not retried on transient `EAGAIN`, so a busy fi
6194 +
6195 +
6196 +
6197 +❯ rerun the tests then verify the journa
6198 +[?25h[?2026l[?2026h[?25l
6199 +not retried on transient `EAGAIN`, so a busy filesystem
6200 +
6201 +
6202 +
6203 +❯ rerun the tests then verify the journal
6204 +[?25h[?2026l[?2026h[?25l
6205 +not retried on transient `EAGAIN`, so a busy filesystem drops t
6206 +
6207 +
6208 +
6209 +❯ rerun the tests then verify the journal
6210 +[?25h[?2026l[?2026h[?25l
6211 +
6212 +
6213 +● Writing · 0.7s
6214 +
6215 +
6216 +[?25h[?2026l[?2026h[?25l
6217 +❯ rerun the tests then verify the journal
6218 +
6219 +The failure point is in `SessionStore.append` — journal writes are
6220 +not retried on transient `EAGAIN`, so a busy filesystem drops the
6221 +event
6222 +
6223 +● Writing · 0.7s
6224 +
6225 +❯
6226 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
6227 +
6228 +
6229 +
6230 +
6231 +
6232 +❯ c
6233 +[?25h[?2026l[?2026h[?25l
6234 +
6235 +event and the
6236 +
6237 +
6238 +
6239 +
6240 +[?25h[?2026l[?2026h[?25l
6241 +
6242 +
6243 +
6244 +
6245 +
6246 +❯ ch
6247 +[?25h[?2026l[?2026h[?25l
6248 +
6249 +event and the session
6250 +
6251 +● Writing · 0.8s
6252 +
6253 +
6254 +[?25h[?2026l[?2026h[?25l
6255 +
6256 +
6257 +
6258 +
6259 +
6260 +❯ che
6261 +[?25h[?2026l[?2026h[?25l
6262 +
6263 +
6264 +
6265 +
6266 +
6267 +
6268 +[?25h[?2026l[?2026h[?25l
6269 +
6270 +event and the session log div
6271 +
6272 +
6273 +
6274 +❯ chec
6275 +[?25h[?2026l[?2026h[?25l
6276 +
6277 +event and the session log diverges fr
6278 +
6279 +
6280 +
6281 +❯ check
6282 +[?25h[?2026l[?2026h[?25l
6283 +
6284 +event and the session log diverges from what
6285 +
6286 +● Writing · 0.9s
6287 +
6288 +❯ check
6289 +[?25h[?2026l[?2026h[?25l
6290 +
6291 +
6292 +
6293 +
6294 +
6295 +
6296 +[?25h[?2026l[?2026h[?25l
6297 +
6298 +event and the session log diverges from what the user
6299 +
6300 +
6301 +
6302 +
6303 +[?25h[?2026l[?2026h[?25l
6304 +
6305 +
6306 +
6307 +
6308 +
6309 +❯ check t
6310 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.append` — journal writes are
6311 +not retried on transient `EAGAIN`, so a busy filesystem drops the
6312 +event and the session log diverges from what the user saw on
6313 +
6314 +
6315 +● Writing · 0.9s
6316 +
6317 +❯ check th
6318 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
6319 +
6320 +
6321 +screen.
6322 +
6323 +● Writing · 1.0s
6324 +
6325 +❯ check the
6326 +[?25h[?2026l[?2026h[?25l
6327 +
6328 +
6329 +
6330 +
6331 +
6332 +
6333 +
6334 +[?25h[?2026l[?2026h[?25l
6335 +
6336 +
6337 +
6338 +
6339 +
6340 +
6341 +❯ check the
6342 +[?25h[?2026l[?2026h[?25l
6343 +
6344 +
6345 +screen. The fix
6346 +
6347 +
6348 +
6349 +
6350 +[?25h[?2026l[?2026h[?25l
6351 +
6352 +
6353 +screen. The fix wraps th
6354 +
6355 +
6356 +
6357 +❯ check the s
6358 +[?25h[?2026l[?2026h[?25l
6359 +
6360 +
6361 +screen. The fix wraps the journa
6362 +
6363 +● Writing · 1.1s
6364 +
6365 +❯ check the se
6366 +[?25h[?2026l[?2026h[?25l
6367 +
6368 +
6369 +
6370 +
6371 +
6372 +
6373 +
6374 +[?25h[?2026l[?2026h[?25l
6375 +
6376 +
6377 +screen. The fix wraps the journal write
6378 +
6379 +
6380 +
6381 +❯ check the ses
6382 +[?25h[?2026l[?2026h[?25l
6383 +
6384 +
6385 +screen. The fix wraps the journal write in a bou
6386 +
6387 +
6388 +
6389 +❯ check the sess
6390 +[?25h[?2026l[?2026h[?25l
6391 +
6392 +
6393 +screen. The fix wraps the journal write in a bounded ret
6394 +
6395 +● Writing · 1.2s
6396 +
6397 +❯ check the sessi
6398 +[?25h[?2026l[?2026h[?25l
6399 +
6400 +
6401 +
6402 +
6403 +
6404 +
6405 +
6406 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.append` — journal writes are
6407 +not retried on transient `EAGAIN`, so a busy filesystem drops the
6408 +event and the session log diverges from what the user saw on
6409 +screen. The fix wraps the journal write in a bounded retry loop
6410 +
6411 +
6412 +● Writing · 1.2s
6413 +
6414 +❯ check the sessio
6415 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
6416 +
6417 +
6418 +
6419 +with exp
6420 +
6421 +
6422 +
6423 +❯ check the session
6424 +[?25h[?2026l[?2026h[?25l
6425 +
6426 +
6427 +
6428 +with exponential
6429 +
6430 +● Writing · 1.3s
6431 +
6432 +❯ check the session
6433 +[?25h[?2026l[?2026h[?25l
6434 +
6435 +
6436 +
6437 +
6438 +
6439 +
6440 +
6441 +
6442 +[?25h[?2026l[?2026h[?25l
6443 +
6444 +
6445 +
6446 +with exponential backoff
6447 +
6448 +
6449 +
6450 +❯ check the session s
6451 +[?25h[?2026l[?2026h[?25l
6452 +
6453 +
6454 +
6455 +with exponential backoff, and ke
6456 +
6457 +
6458 +
6459 +❯ check the session st
6460 +[?25h[?2026l[?2026h[?25l
6461 +
6462 +
6463 +
6464 +with exponential backoff, and keeps the
6465 +
6466 +● Writing · 1.4s
6467 +
6468 +❯ check the session sto
6469 +[?25h[?2026l[?2026h[?25l
6470 +
6471 +
6472 +
6473 +
6474 +
6475 +
6476 +
6477 +
6478 +[?25h[?2026l[?2026h[?25l
6479 +
6480 +
6481 +
6482 +
6483 +
6484 +
6485 +
6486 +❯ check the session stor
6487 +[?25h[?2026l[?2026h[?25l
6488 +
6489 +
6490 +
6491 +with exponential backoff, and keeps the event lo
6492 +
6493 +
6494 +
6495 +
6496 +[?25h[?2026l[?2026h[?25l
6497 +
6498 +
6499 +
6500 +
6501 +
6502 +
6503 +
6504 +❯ check the session store
6505 +[?25h[?2026l[?2026h[?25l
6506 +
6507 +
6508 +
6509 +with exponential backoff, and keeps the event log append
6510 +
6511 +
6512 +
6513 +
6514 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.append` — journal writes are
6515 +not retried on transient `EAGAIN`, so a busy filesystem drops the
6516 +event and the session log diverges from what the user saw on
6517 +screen. The fix wraps the journal write in a bounded retry loop
6518 +with exponential backoff, and keeps the event log append-only.
6519 +
6520 +● Writing · 1.5s
6521 +
6522 +❯ check the session store
6523 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
6524 +
6525 +
6526 +[?25h[?2026l[?2026h[?25lKey chan
6527 +
6528 +● Writing · 1.5s
6529 +
6530 +❯ check the session store r
6531 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
6532 +
6533 +
6534 +
6535 +❯ check the session store re
6536 +[?25h[?2026l[?2026h[?25lKey changes:
6537 +
6538 +-
6539 +
6540 +● Writing · 1.5s
6541 +
6542 +❯ check the session store re
6543 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
6544 +
6545 +● Writing · 1.6s
6546 +
6547 +❯ check the session store ret
6548 +[?25h[?2026l[?2026h[?25l- `append`
6549 +
6550 +
6551 +
6552 +
6553 +[?25h[?2026l[?2026h[?25l
6554 +
6555 +
6556 +
6557 +❯ check the session store retr
6558 +[?25h[?2026l[?2026h[?25l- `append` now ret
6559 +
6560 +
6561 +
6562 +
6563 +[?25h[?2026l[?2026h[?25l
6564 +
6565 +
6566 +
6567 +❯ check the session store retry
6568 +[?25h[?2026l[?2026h[?25l- `append` now retries up
6569 +
6570 +
6571 +
6572 +
6573 +[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 tim
6574 +
6575 +● Writing · 1.7s
6576 +
6577 +❯ check the session store retry
6578 +[?25h[?2026l[?2026h[?25l
6579 +
6580 +
6581 +
6582 +
6583 +[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 times on `E
6584 +
6585 +
6586 +
6587 +❯ check the session store retry l
6588 +[?25h[?2026l[?2026h[?25l
6589 +
6590 +
6591 +
6592 +❯ check the session store retry lo
6593 +[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 times on `EAGAIN` /
6594 +
6595 +
6596 +
6597 +
6598 +[?25h[?2026l[?2026h[?25l
6599 +
6600 +● Writing · 1.8s
6601 +
6602 +❯ check the session store retry log
6603 +[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 times on `EAGAIN` / `EBUSY`
6604 +
6605 +
6606 +
6607 +
6608 +[?25h[?2026l[?2026h[?25l
6609 +
6610 +
6611 +
6612 +❯ check the session store retry logi
6613 +[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 times on `EAGAIN` / `EBUSY`
6614 +- backo
6615 +
6616 +● Writing · 1.8s
6617 +
6618 +❯ check the session store retry logi
6619 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
6620 +- backoff is 2
6621 +
6622 +
6623 +
6624 +
6625 +[?25h[?2026l[?2026h[?25l
6626 +
6627 +
6628 +
6629 +
6630 +❯ check the session store retry logic
6631 +[?25h[?2026l[?2026h[?25l
6632 +- backoff is 2 ms, 8 ms
6633 +
6634 +● Writing · 1.9s
6635 +
6636 +❯ check the session store retry logic
6637 +[?25h[?2026l[?2026h[?25l
6638 +
6639 +
6640 +
6641 +
6642 +
6643 +[?25h[?2026l[?2026h[?25l
6644 +- backoff is 2 ms, 8 ms, 32 ms
6645 +
6646 +
6647 +
6648 +❯ check the session store retry logic a
6649 +[?25h[?2026l[?2026h[?25l
6650 +
6651 +
6652 +
6653 +
6654 +❯ check the session store retry logic an
6655 +[?25h[?2026l[?2026h[?25l
6656 +- backoff is 2 ms, 8 ms, 32 ms — bounde
6657 +
6658 +
6659 +
6660 +
6661 +[?25h[?2026l[?2026h[?25l
6662 +
6663 +
6664 +● Writing · 2.0s
6665 +
6666 +❯ check the session store retry logic and
6667 +[?25h[?2026l[?2026h[?25l
6668 +- backoff is 2 ms, 8 ms, 32 ms — bounded, never
6669 +
6670 +
6671 +
6672 +
6673 +[?25h[?2026l[?2026h[?25l
6674 +
6675 +
6676 +
6677 +
6678 +❯ check the session store retry logic and
6679 +[?25h[?2026l[?2026h[?25l
6680 +- backoff is 2 ms, 8 ms, 32 ms — bounded, never user-vi
6681 +
6682 +
6683 +
6684 +
6685 +[?25h[?2026l[?2026h[?25l
6686 +❯ check the session store retry logic and
6687 +
6688 +- `append` now retries up to 3 times on `EAGAIN` / `EBUSY`
6689 +- backoff is 2 ms, 8 ms, 32 ms — bounded, never user-vi
6690 +
6691 +● Writing · 2.0s
6692 +
6693 +❯
6694 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 times on `EAGAIN` / `EBUSY`
6695 +- backoff is 2 ms, 8 ms, 32 ms — bounded, never user-visible
6696 +-
6697 +
6698 +● Writing · 2.0s
6699 +
6700 +❯ r
6701 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
6702 +
6703 +
6704 +
6705 +● Writing · 2.1s
6706 +
6707 +❯ re
6708 +[?25h[?2026l[?2026h[?25l
6709 +
6710 +- a `Write
6711 +
6712 +
6713 +
6714 +
6715 +[?25h[?2026l[?2026h[?25l
6716 +
6717 +- a `WriteFailed`
6718 +
6719 +
6720 +
6721 +❯ rer
6722 +[?25h[?2026l[?2026h[?25l
6723 +
6724 +- a `WriteFailed` event is
6725 +
6726 +
6727 +
6728 +
6729 +[?25h[?2026l[?2026h[?25l
6730 +
6731 +
6732 +
6733 +
6734 +
6735 +❯ reru
6736 +[?25h[?2026l[?2026h[?25l
6737 +
6738 +- a `WriteFailed` event is emitted
6739 +
6740 +● Writing · 2.2s
6741 +
6742 +❯ rerun
6743 +[?25h[?2026l[?2026h[?25l
6744 +
6745 +
6746 +
6747 +
6748 +
6749 +
6750 +[?25h[?2026l[?2026h[?25l
6751 +
6752 +- a `WriteFailed` event is emitted only af
6753 +
6754 +
6755 +
6756 +❯ rerun
6757 +[?25h[?2026l[?2026h[?25l
6758 +
6759 +- a `WriteFailed` event is emitted only after the
6760 +
6761 +
6762 +
6763 +❯ rerun t
6764 +[?25h[?2026l[?2026h[?25l
6765 +
6766 +- a `WriteFailed` event is emitted only after the final at
6767 +
6768 +● Writing · 2.3s
6769 +
6770 +❯ rerun th
6771 +[?25h[?2026l[?2026h[?25l
6772 +
6773 +
6774 +
6775 +
6776 +
6777 +
6778 +[?25h[?2026l[?2026h[?25l
6779 +
6780 +
6781 +
6782 +
6783 +
6784 +❯ rerun the
6785 +[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 times on `EAGAIN` / `EBUSY`
6786 +- backoff is 2 ms, 8 ms, 32 ms — bounded, never user-visible
6787 +- a `WriteFailed` event is emitted only after the final attempt
6788 +-
6789 +
6790 +● Writing · 2.3s
6791 +
6792 +❯ rerun the
6793 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
6794 +
6795 +
6796 +
6797 +
6798 +
6799 +
6800 +❯ rerun the
6801 +[?25h[?2026l[?2026h[?25l
6802 +
6803 +
6804 +- no parti
6805 +
6806 +● Writing · 2.4s
6807 +
6808 +
6809 +[?25h[?2026l[?2026h[?25l
6810 +
6811 +
6812 +- no partial frame
6813 +
6814 +
6815 +
6816 +❯ rerun the t
6817 +[?25h[?2026l[?2026h[?25l
6818 +
6819 +
6820 +
6821 +
6822 +
6823 +
6824 +
6825 +[?25h[?2026l[?2026h[?25l
6826 +
6827 +
6828 +- no partial frames are ev
6829 +
6830 +
6831 +
6832 +❯ rerun the te
6833 +[?25h[?2026l[?2026h[?25l
6834 +
6835 +
6836 +- no partial frames are ever kept
6837 +
6838 +
6839 +
6840 +❯ rerun the tes
6841 +[?25h[?2026l[?2026h[?25l
6842 +
6843 +
6844 +- no partial frames are ever kept in the j
6845 +
6846 +● Writing · 2.5s
6847 +
6848 +❯ rerun the test
6849 +[?25h[?2026l[?2026h[?25l
6850 +
6851 +
6852 +
6853 +
6854 +
6855 +
6856 +
6857 +[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 times on `EAGAIN` / `EBUSY`
6858 +- backoff is 2 ms, 8 ms, 32 ms — bounded, never user-visible
6859 +- a `WriteFailed` event is emitted only after the final attempt
6860 +- no partial frames are ever kept in the journal
6861 +
6862 +● Writing · 2.5s
6863 +
6864 +❯ rerun the tests
6865 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
6866 +
6867 +❯ rerun the tests
6868 +[?25h[?2026l[?2026h[?25l```ts
6869 +as
6870 +
6871 +● Writing · 2.6s
6872 +
6873 +❯ rerun the tests
6874 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
6875 +async appe
6876 +
6877 +
6878 +
6879 +
6880 +[?25h[?2026l[?2026h[?25l
6881 +
6882 +
6883 +
6884 +
6885 +❯ rerun the tests t
6886 +[?25h[?2026l[?2026h[?25l
6887 +
6888 +
6889 +
6890 +
6891 +
6892 +[?25h[?2026l[?2026h[?25l
6893 +
6894 +
6895 +
6896 +
6897 +❯ rerun the tests th
6898 +[?25h[?2026l[?2026h[?25l
6899 +async append(event
6900 +
6901 +
6902 +
6903 +
6904 +[?25h[?2026l[?2026h[?25l
6905 +async append(event: Sessio
6906 +
6907 +
6908 +
6909 +❯ rerun the tests the
6910 +[?25h[?2026l[?2026h[?25l
6911 +async append(event: SessionEvent):
6912 +
6913 +● Writing · 2.7s
6914 +
6915 +❯ rerun the tests then
6916 +[?25h[?2026l[?2026h[?25l
6917 +
6918 +
6919 +
6920 +
6921 +
6922 +[?25h[?2026l[?2026h[?25l
6923 +async append(event: SessionEvent): Promise
6924 +
6925 +
6926 +
6927 +
6928 +[?25h[?2026l[?2026h[?25l
6929 +
6930 +
6931 +
6932 +
6933 +❯ rerun the tests then
6934 +[?25h[?2026l[?2026h[?25l
6935 +async append(event: SessionEvent): Promise<void> {
6936 +
6937 +
6938 +
6939 +❯ rerun the tests then v
6940 +[?25h[?2026l[?2026h[?25l```ts
6941 +async append(event: SessionEvent): Promise<void> {
6942 + for (
6943 +
6944 +● Writing · 2.8s
6945 +
6946 +❯ rerun the tests then v
6947 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
6948 +
6949 +
6950 +
6951 +
6952 +
6953 +❯ rerun the tests then ve
6954 +[?25h[?2026l[?2026h[?25l
6955 +
6956 +
6957 +
6958 +
6959 +
6960 +
6961 +[?25h[?2026l[?2026h[?25l
6962 +
6963 +
6964 +
6965 +
6966 +
6967 +❯ rerun the tests then ver
6968 +[?25h[?2026l[?2026h[?25l
6969 +
6970 + for (let atte
6971 +
6972 +
6973 +
6974 +
6975 +[?25h[?2026l[?2026h[?25l
6976 +
6977 + for (let attempt = 0;
6978 +
6979 +
6980 +
6981 +
6982 +[?25h[?2026l[?2026h[?25l
6983 +
6984 +
6985 +
6986 +
6987 +
6988 +❯ rerun the tests then veri
6989 +[?25h[?2026l[?2026h[?25l
6990 +
6991 + for (let attempt = 0; attempt
6992 +
6993 +● Writing · 2.9s
6994 +
6995 +❯ rerun the tests then verif
6996 +[?25h[?2026l[?2026h[?25l
6997 +
6998 +
6999 +
7000 +
7001 +
7002 +
7003 +[?25h[?2026l[?2026h[?25l
7004 +
7005 + for (let attempt = 0; attempt < 3; at
7006 +
7007 +
7008 +
7009 +❯ rerun the tests then verify
7010 +[?25h[?2026l[?2026h[?25l
7011 +
7012 + for (let attempt = 0; attempt < 3; attempt++)
7013 +
7014 +
7015 +
7016 +❯ rerun the tests then verify
7017 +[?25h[?2026l[?2026h[?25l
7018 +
7019 +
7020 +
7021 +● Writing · 3.0s
7022 +
7023 +❯ rerun the tests then verify t
7024 +[?25h[?2026l[?2026h[?25l```ts
7025 +async append(event: SessionEvent): Promise<void> {
7026 + for (let attempt = 0; attempt < 3; attempt++) {
7027 + t
7028 +
7029 +● Writing · 3.0s
7030 +
7031 +❯ rerun the tests then verify t
7032 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
7033 +
7034 +
7035 +
7036 +
7037 +
7038 +
7039 +❯ rerun the tests then verify th
7040 +[?25h[?2026l[?2026h[?25l```ts
7041 +async append(event: SessionEvent): Promise<void> {
7042 + for (let attempt = 0; attempt < 3; attempt++) {
7043 + try {
7044 +
7045 +
7046 +● Writing · 3.0s
7047 +
7048 +❯ rerun the tests then verify th
7049 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
7050 +
7051 +
7052 +
7053 + await
7054 +
7055 +
7056 +
7057 +❯ rerun the tests then verify the
7058 +[?25h[?2026l[?2026h[?25l
7059 +
7060 +
7061 +
7062 +
7063 +
7064 +● Writing · 3.1s
7065 +
7066 +❯ rerun the tests then verify the
7067 +[?25h[?2026l[?2026h[?25l
7068 +
7069 +
7070 +
7071 + await this.jo
7072 +
7073 +
7074 +
7075 +
7076 +[?25h[?2026l[?2026h[?25l
7077 +
7078 +
7079 +
7080 + await this.journal.wr
7081 +
7082 +
7083 +
7084 +❯ rerun the tests then verify the j
7085 +[?25h[?2026l[?2026h[?25l
7086 +
7087 +
7088 +
7089 +
7090 +
7091 +
7092 +
7093 +❯ rerun the tests then verify the jo
7094 +[?25h[?2026l[?2026h[?25l
7095 +
7096 +
7097 +
7098 + await this.journal.write(enco
7099 +
7100 +● Writing · 3.2s
7101 +
7102 +
7103 +[?25h[?2026l[?2026h[?25l
7104 +
7105 +
7106 +
7107 + await this.journal.write(encode(event
7108 +
7109 +
7110 +
7111 +
7112 +[?25h[?2026l[?2026h[?25l
7113 +
7114 +
7115 +
7116 +
7117 +
7118 +
7119 +
7120 +❯ rerun the tests then verify the jou
7121 +[?25h[?2026l[?2026h[?25l
7122 +
7123 +
7124 +
7125 +
7126 +
7127 +
7128 +
7129 +
7130 +[?25h[?2026l[?2026h[?25l```ts
7131 +async append(event: SessionEvent): Promise<void> {
7132 + for (let attempt = 0; attempt < 3; attempt++) {
7133 + try {
7134 + await this.journal.write(encode(event));
7135 +
7136 +
7137 +● Writing · 3.2s
7138 +
7139 +❯ rerun the tests then verify the jour
7140 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
7141 +
7142 +
7143 +
7144 +
7145 + return
7146 +
7147 +● Writing · 3.3s
7148 +
7149 +❯ rerun the tests then verify the journ
7150 +[?25h[?2026l[?2026h[?25l
7151 +
7152 +
7153 +
7154 +
7155 +
7156 +
7157 +
7158 +
7159 +❯ rerun the tests then verify the journa
7160 +[?25h[?2026l[?2026h[?25l```ts
7161 +async append(event: SessionEvent): Promise<void> {
7162 + for (let attempt = 0; attempt < 3; attempt++) {
7163 + try {
7164 + await this.journal.write(encode(event));
7165 + return;
7166 + }
7167 +
7168 +● Writing · 3.3s
7169 +
7170 +❯ rerun the tests then verify the journa
7171 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
7172 +
7173 +
7174 +
7175 +
7176 +
7177 + } catch (e
7178 +
7179 +
7180 +
7181 +❯ rerun the tests then verify the journal
7182 +[?25h[?2026l[?2026h[?25l```ts
7183 +async append(event: SessionEvent): Promise<void> {
7184 + for (let attempt = 0; attempt < 3; attempt++) {
7185 + try {
7186 + await this.journal.write(encode(event));
7187 + return;
7188 + } catch (err) {
7189 +
7190 +
7191 +● Writing · 3.4s
7192 +
7193 +❯ rerun the tests then verify the journal
7194 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
7195 +❯ rerun the tests then verify the journal
7196 +
7197 +```ts
7198 +async append(event: SessionEvent): Promise<void> {
7199 + for (let attempt = 0; attempt < 3; attempt++) {
7200 + try {
7201 + await this.journal.write(encode(event));
7202 + return;
7203 + } catch (err) {
7204 + if (
7205 +
7206 +● Writing · 3.4s
7207 +
7208 +❯
7209 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
7210 +
7211 +
7212 +
7213 +
7214 +
7215 +
7216 +
7217 +
7218 +
7219 +
7220 +❯ c
7221 +[?25h[?2026l[?2026h[?25l
7222 +
7223 +
7224 +
7225 +
7226 +
7227 +
7228 + if (!isTrans
7229 +
7230 +
7231 +
7232 +❯ ch
7233 +[?25h[?2026l[?2026h[?25l
7234 +
7235 +
7236 +
7237 +
7238 +
7239 +
7240 + if (!isTransient(err
7241 +
7242 +● Writing · 3.5s
7243 +
7244 +
7245 +[?25h[?2026l[?2026h[?25l
7246 +
7247 +
7248 +
7249 +
7250 +
7251 +
7252 +
7253 +
7254 +
7255 +
7256 +❯ che
7257 +[?25h[?2026l[?2026h[?25l
7258 +
7259 +
7260 +
7261 +
7262 +
7263 +
7264 + if (!isTransient(err)) throw
7265 +
7266 +
7267 +
7268 +
7269 +[?25h[?2026l[?2026h[?25l
7270 +
7271 +
7272 +
7273 +
7274 +
7275 +
7276 +
7277 +
7278 +
7279 +
7280 +❯ chec
7281 +[?25h[?2026l[?2026h[?25l```ts
7282 +async append(event: SessionEvent): Promise<void> {
7283 + for (let attempt = 0; attempt < 3; attempt++) {
7284 + try {
7285 + await this.journal.write(encode(event));
7286 + return;
7287 + } catch (err) {
7288 + if (!isTransient(err)) throw err;
7289 +
7290 +
7291 +● Writing · 3.5s
7292 +
7293 +❯ chec
7294 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
7295 +
7296 +
7297 +
7298 +
7299 +
7300 +
7301 +
7302 +
7303 +
7304 +
7305 +
7306 +❯ check
7307 +[?25h[?2026l[?2026h[?25l
7308 +
7309 +
7310 +
7311 +
7312 +
7313 +
7314 +
7315 + awai
7316 +
7317 +● Writing · 3.6s
7318 +
7319 +❯ check
7320 +[?25h[?2026l[?2026h[?25l
7321 +
7322 +
7323 +
7324 +
7325 +
7326 +
7327 +
7328 + await delay(
7329 +
7330 +
7331 +
7332 +
7333 +[?25h[?2026l[?2026h[?25l
7334 +
7335 +
7336 +
7337 +
7338 +
7339 +
7340 +
7341 +
7342 +
7343 +
7344 +
7345 +❯ check t
7346 +[?25h[?2026l[?2026h[?25l
7347 +
7348 +
7349 +
7350 +
7351 +
7352 +
7353 +
7354 + await delay(2 ** (2
7355 +
7356 +
7357 +
7358 +❯ check th
7359 +[?25h[?2026l[?2026h[?25l
7360 +
7361 +
7362 +
7363 +
7364 +
7365 +
7366 +
7367 + await delay(2 ** (2 * attemp
7368 +
7369 +● Writing · 3.7s
7370 +
7371 +
7372 +[?25h[?2026l[?2026h[?25l
7373 +
7374 +
7375 +
7376 +
7377 +
7378 +
7379 +
7380 +
7381 +
7382 +
7383 +
7384 +❯ check the
7385 +[?25h[?2026l[?2026h[?25l
7386 +
7387 +
7388 +
7389 +
7390 +
7391 +
7392 +
7393 + await delay(2 ** (2 * attempt + 1));
7394 +
7395 +
7396 +
7397 +
7398 +[?25h[?2026l[?2026h[?25l
7399 +
7400 +
7401 +
7402 +
7403 +
7404 +
7405 +
7406 +
7407 +
7408 +
7409 +
7410 +❯ check the
7411 +[?25h[?2026l[?2026h[?25l```ts
7412 +async append(event: SessionEvent): Promise<void> {
7413 + for (let attempt = 0; attempt < 3; attempt++) {
7414 + try {
7415 + await this.journal.write(encode(event));
7416 + return;
7417 + } catch (err) {
7418 + if (!isTransient(err)) throw err;
7419 + await delay(2 ** (2 * attempt + 1));
7420 + }
7421 +
7422 +
7423 +● Writing · 3.7s
7424 +
7425 +❯ check the s
7426 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l```ts
7427 +async append(event: SessionEvent): Promise<void> {
7428 + for (let attempt = 0; attempt < 3; attempt++) {
7429 + try {
7430 + await this.journal.write(encode(event));
7431 + return;
7432 + } catch (err) {
7433 + if (!isTransient(err)) throw err;
7434 + await delay(2 ** (2 * attempt + 1));
7435 + }
7436 + }
7437 + thi
7438 +
7439 +● Writing · 3.8s
7440 +
7441 +❯ check the se
7442 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
7443 +
7444 +
7445 +
7446 +
7447 +
7448 +
7449 +
7450 +
7451 +
7452 +
7453 + this.bus.em
7454 +
7455 +
7456 +
7457 +
7458 +[?25h[?2026l[?2026h[?25l
7459 +
7460 +
7461 +
7462 +
7463 +
7464 +
7465 +
7466 +
7467 +
7468 +
7469 +
7470 +
7471 +
7472 +
7473 +❯ check the ses
7474 +[?25h[?2026l[?2026h[?25l
7475 +
7476 +
7477 +
7478 +
7479 +
7480 +
7481 +
7482 +
7483 +
7484 +
7485 + this.bus.emit({ typ
7486 +
7487 +
7488 +
7489 +❯ check the sess
7490 +[?25h[?2026l[?2026h[?25l
7491 +
7492 +
7493 +
7494 +
7495 +
7496 +
7497 +
7498 +
7499 +
7500 +
7501 + this.bus.emit({ type: 'Writ
7502 +
7503 +● Writing · 3.9s
7504 +
7505 +❯ check the sessi
7506 +[?25h[?2026l[?2026h[?25l
7507 +
7508 +
7509 +
7510 +
7511 +
7512 +
7513 +
7514 +
7515 +
7516 +
7517 +
7518 +
7519 +
7520 +
7521 +
7522 +[?25h[?2026l[?2026h[?25l
7523 +
7524 +
7525 +
7526 +
7527 +
7528 +
7529 +
7530 +
7531 +
7532 +
7533 + this.bus.emit({ type: 'WriteFailed'
7534 +
7535 +
7536 +
7537 +❯ check the sessio
7538 +[?25h[?2026l[?2026h[?25l
7539 +
7540 +
7541 +
7542 +
7543 +
7544 +
7545 +
7546 +
7547 +
7548 +
7549 +
7550 +
7551 +
7552 +
7553 +❯ check the session
7554 +[?25h[?2026l[?2026h[?25l
7555 +
7556 +
7557 +
7558 +
7559 +
7560 +
7561 +
7562 +
7563 +
7564 +
7565 + this.bus.emit({ type: 'WriteFailed', event
7566 +
7567 +
7568 +
7569 +
7570 +[?25h[?2026l[?2026h[?25l for (let attempt = 0; attempt < 3; attempt++) {
7571 + try {
7572 + await this.journal.write(encode(event));
7573 + return;
7574 + } catch (err) {
7575 + if (!isTransient(err)) throw err;
7576 + await delay(2 ** (2 * attempt + 1));
7577 + }
7578 + }
7579 + this.bus.emit({ type: 'WriteFailed', event });
7580 +}
7581 +``
7582 +
7583 +● Writing · 4.0s
7584 +
7585 +❯ check the session
7586 +[?25h[?2026l[?2026h[?25l
7587 +
7588 +
7589 +
7590 +
7591 +
7592 +
7593 +
7594 +
7595 +
7596 +
7597 +
7598 +
7599 +
7600 +
7601 +
7602 +[?25h[?2026l[?2026h[?25l```ts
7603 +async append(event: SessionEvent): Promise<void> {
7604 + for (let attempt = 0; attempt < 3; attempt++) {
7605 + try {
7606 + await this.journal.write(encode(event));
7607 + return;
7608 + } catch (err) {
7609 + if (!isTransient(err)) throw err;
7610 + await delay(2 ** (2 * attempt + 1));
7611 + }
7612 + }
7613 + this.bus.emit({ type: 'WriteFailed', event });
7614 +}
7615 +```
7616 +
7617 +The r
7618 +
7619 +● Writing · 4.0s
7620 +
7621 +❯ check the session s
7622 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25lThe retry loo
7623 +
7624 +
7625 +
7626 +❯ check the session st
7627 +[?25h[?2026l[?2026h[?25l ▸ Edit src/context/engine.ts · +31 −12
7628 +The retry loop is del
7629 +
7630 +● Editing src/context/engine.ts · 0.0s
7631 +
7632 +❯ check the session sto
7633 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
7634 +
7635 +
7636 +
7637 +
7638 +[?25h[?2026l[?2026h[?25lThe retry loop is deliberatel
7639 +
7640 +
7641 +
7642 +❯ check the session stor
7643 +[?25h[?2026l[?2026h[?25lThe retry loop is deliberately synchr
7644 +
7645 +● Editing src/context/engine.ts · 0.1s
7646 +
7647 +❯ check the session store
7648 +[?25h[?2026l[?2026h[?25lThe retry loop is deliberately synchronous wi
7649 +
7650 +
7651 +
7652 +❯ check the session store
7653 +[?25h[?2026l[?2026h[?25l
7654 +
7655 +
7656 +
7657 +
7658 +[?25h[?2026l[?2026h[?25lThe retry loop is deliberately synchronous with the e
7659 +
7660 +
7661 +
7662 +❯ check the session store r
7663 +[?25h[?2026l[?2026h[?25lThe retry loop is deliberately synchronous with the event bus
7664 +
7665 +● Editing src/context/engine.ts · 0.2s
7666 +
7667 +❯ check the session store re
7668 +[?25h[?2026l[?2026h[?25lThe retry loop is deliberately synchronous with the event bus:
7669 +observ
7670 +
7671 +● Editing src/context/engine.ts · 0.2s
7672 +
7673 +❯ check the session store ret
7674 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
7675 +observations s
7676 +
7677 +
7678 +
7679 +
7680 +[?25h[?2026l[?2026h[?25l
7681 +
7682 +
7683 +
7684 +
7685 +❯ check the session store retr
7686 +[?25h[?2026l[?2026h[?25l
7687 +observations settle in
7688 +
7689 +● Editing src/context/engine.ts · 0.3s
7690 +
7691 +
7692 +[?25h[?2026l[?2026h[?25l
7693 +
7694 +
7695 +
7696 +
7697 +❯ check the session store retry
7698 +[?25h[?2026l[?2026h[?25l
7699 +observations settle in order,
7700 +
7701 +
7702 +
7703 +
7704 +[?25h[?2026l[?2026h[?25l
7705 +
7706 +
7707 +
7708 +
7709 +❯ check the session store retry
7710 +[?25h[?2026l[?2026h[?25l
7711 +observations settle in order, and the
7712 +
7713 +
7714 +
7715 +
7716 +[?25h[?2026l[?2026h[?25l
7717 +
7718 +
7719 +
7720 +
7721 +❯ check the session store retry l
7722 +[?25h[?2026l[?2026h[?25l
7723 +observations settle in order, and the live reg
7724 +
7725 +● Editing src/context/engine.ts · 0.4s
7726 +
7727 +
7728 +[?25h[?2026l[?2026h[?25l
7729 +
7730 +
7731 +
7732 +
7733 +❯ check the session store retry lo
7734 +[?25h[?2026l[?2026h[?25l
7735 +observations settle in order, and the live region neve
7736 +
7737 +
7738 +
7739 +
7740 +[?25h[?2026l[?2026h[?25l
7741 +
7742 +
7743 +
7744 +
7745 +❯ check the session store retry log
7746 +[?25h[?2026l[?2026h[?25l
7747 +observations settle in order, and the live region never shows
7748 +
7749 +
7750 +
7751 +
7752 +[?25h[?2026l[?2026h[?25l
7753 +
7754 +
7755 +
7756 +
7757 +❯ check the session store retry logi
7758 +[?25h[?2026l[?2026h[?25lThe retry loop is deliberately synchronous with the event bus:
7759 +observations settle in order, and the live region never shows a
7760 +frame
7761 +
7762 +● Editing src/context/engine.ts · 0.5s
7763 +
7764 +❯ check the session store retry logic
7765 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
7766 +
7767 +frame that the
7768 +
7769 +
7770 +
7771 +❯ check the session store retry logic
7772 +[?25h[?2026l[?2026h[?25l
7773 +
7774 +frame that the journal
7775 +
7776 +
7777 +
7778 +❯ check the session store retry logic a
7779 +[?25h[?2026l[?2026h[?25l
7780 +
7781 +
7782 +
7783 +● Editing src/context/engine.ts · 0.6s
7784 +
7785 +❯ check the session store retry logic an
7786 +[?25h[?2026l[?2026h[?25l
7787 +
7788 +frame that the journal has not
7789 +
7790 +
7791 +
7792 +
7793 +[?25h[?2026l[?2026h[?25l
7794 +
7795 +
7796 +
7797 +
7798 +
7799 +❯ check the session store retry logic and
7800 +[?25h[?2026l[?2026h[?25l
7801 +
7802 +frame that the journal has not accepte
7803 +
7804 +
7805 +
7806 +
7807 +[?25h[?2026l[?2026h[?25l
7808 +
7809 +
7810 +
7811 +
7812 +
7813 +❯ check the session store retry logic and
7814 +[?25h[?2026l[?2026h[?25l
7815 +
7816 +frame that the journal has not accepted. Inter
7817 +
7818 +● Editing src/context/engine.ts · 0.7s
7819 +
7820 +
7821 +[?25h[?2026l[?2026h[?25l
7822 +❯ check the session store retry logic and
7823 +
7824 +The retry loop is deliberately synchronous with the event bus:
7825 +observations settle in order, and the live region never shows a
7826 +frame that the journal has not accepted. Interruption
7827 +
7828 +● Editing src/context/engine.ts · 0.7s
7829 +
7830 +❯
7831 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
7832 +
7833 +
7834 +
7835 +
7836 +
7837 +❯ r
7838 +[?25h[?2026l[?2026h[?25lThe retry loop is deliberately synchronous with the event bus:
7839 +observations settle in order, and the live region never shows a
7840 +frame that the journal has not accepted. Interruption is safe
7841 +
7842 +
7843 +● Editing src/context/engine.ts · 0.7s
7844 +
7845 +❯ re
7846 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
7847 +
7848 +
7849 +because
7850 +
7851 +
7852 +
7853 +❯ rer
7854 +[?25h[?2026l[?2026h[?25l
7855 +
7856 +
7857 +because a cancel
7858 +
7859 +● Editing src/context/engine.ts · 0.8s
7860 +
7861 +❯ reru
7862 +[?25h[?2026l[?2026h[?25l
7863 +
7864 +
7865 +because a cancelled writ
7866 +
7867 +
7868 +
7869 +❯ rerun
7870 +[?25h[?2026l[?2026h[?25l
7871 +
7872 +
7873 +because a cancelled write is ind
7874 +
7875 +
7876 +
7877 +❯ rerun
7878 +[?25h[?2026l[?2026h[?25l
7879 +
7880 +
7881 +
7882 +
7883 +● Editing src/context/engine.ts · 0.9s
7884 +
7885 +❯ rerun t
7886 +[?25h[?2026l[?2026h[?25l
7887 +
7888 +
7889 +because a cancelled write is indistingui
7890 +
7891 +
7892 +
7893 +
7894 +[?25h[?2026l[?2026h[?25l
7895 +
7896 +
7897 +
7898 +
7899 +
7900 +
7901 +❯ rerun th
7902 +[?25h[?2026l[?2026h[?25l
7903 +
7904 +
7905 +because a cancelled write is indistinguishable f
7906 +
7907 +
7908 +
7909 +
7910 +[?25h[?2026l[?2026h[?25l
7911 +
7912 +
7913 +
7914 +
7915 +
7916 +
7917 +❯ rerun the
7918 +[?25h[?2026l[?2026h[?25l
7919 +
7920 +
7921 +because a cancelled write is indistinguishable from a wr
7922 +
7923 +● Editing src/context/engine.ts · 1.0s
7924 +
7925 +
7926 +[?25h[?2026l[?2026h[?25l
7927 +
7928 +
7929 +
7930 +
7931 +
7932 +
7933 +❯ rerun the
7934 +[?25h[?2026l[?2026h[?25l
7935 +
7936 +
7937 +because a cancelled write is indistinguishable from a write that
7938 +
7939 +
7940 +
7941 +
7942 +[?25h[?2026l[?2026h[?25lThe retry loop is deliberately synchronous with the event bus:
7943 +observations settle in order, and the live region never shows a
7944 +frame that the journal has not accepted. Interruption is safe
7945 +because a cancelled write is indistinguishable from a write that
7946 +never s
7947 +
7948 +● Editing src/context/engine.ts · 1.0s
7949 +
7950 +❯ rerun the t
7951 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
7952 +
7953 +
7954 +
7955 +never started —
7956 +
7957 +
7958 +
7959 +❯ rerun the te
7960 +[?25h[?2026l[?2026h[?25l
7961 +
7962 +
7963 +
7964 +never started — the jou
7965 +
7966 +● Editing src/context/engine.ts · 1.1s
7967 +
7968 +❯ rerun the tes
7969 +[?25h[?2026l[?2026h[?25l
7970 +
7971 +
7972 +
7973 +never started — the journal eit
7974 +
7975 +
7976 +
7977 +❯ rerun the test
7978 +[?25h[?2026l[?2026h[?25l
7979 +
7980 +
7981 +
7982 +never started — the journal either has
7983 +
7984 +
7985 +
7986 +
7987 +[?25h[?2026l[?2026h[?25l
7988 +
7989 +
7990 +
7991 +
7992 +
7993 +
7994 +
7995 +❯ rerun the tests
7996 +[?25h[?2026l[?2026h[?25l
7997 +
7998 +
7999 +
8000 +never started — the journal either has the full
8001 +
8002 +● Editing src/context/engine.ts · 1.2s
8003 +
8004 +❯ rerun the tests
8005 +[?25h[?2026l[?2026h[?25l
8006 +
8007 +
8008 +
8009 +never started — the journal either has the full event o
8010 +
8011 +
8012 +
8013 +
8014 +[?25h[?2026l[?2026h[?25l
8015 +
8016 +
8017 +
8018 +
8019 +
8020 +
8021 +
8022 +❯ rerun the tests t
8023 +[?25h[?2026l[?2026h[?25l
8024 +
8025 +
8026 +
8027 +never started — the journal either has the full event or nothin
8028 +
8029 +
8030 +
8031 +
8032 +[?25h[?2026l[?2026h[?25l
8033 +
8034 +
8035 +
8036 +
8037 +
8038 +
8039 +
8040 +❯ rerun the tests th
8041 +[?25h[?2026l[?2026h[?25lThe retry loop is deliberately synchronous with the event bus:
8042 +observations settle in order, and the live region never shows a
8043 +frame that the journal has not accepted. Interruption is safe
8044 +because a cancelled write is indistinguishable from a write that
8045 +never started — the journal either has the full event or nothing.
8046 +
8047 +Two
8048 +
8049 +● Editing src/context/engine.ts · 1.3s
8050 +
8051 +❯ rerun the tests th
8052 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
8053 +
8054 +
8055 +
8056 +❯ rerun the tests the
8057 +[?25h[?2026l[?2026h[?25lTwo details
8058 +
8059 +
8060 +
8061 +
8062 +[?25h[?2026l[?2026h[?25l
8063 +
8064 +
8065 +
8066 +❯ rerun the tests then
8067 +[?25h[?2026l[?2026h[?25lTwo details worth ca
8068 +
8069 +
8070 +
8071 +
8072 +[?25h[?2026l[?2026h[?25l
8073 +
8074 +
8075 +
8076 +❯ rerun the tests then
8077 +[?25h[?2026l[?2026h[?25lTwo details worth calling ou
8078 +
8079 +● Editing src/context/engine.ts · 1.4s
8080 +
8081 +
8082 +[?25h[?2026l[?2026h[?25l
8083 +
8084 +
8085 +
8086 +❯ rerun the tests then v
8087 +[?25h[?2026l[?2026h[?25lTwo details worth calling out for re
8088 +
8089 +
8090 +
8091 +❯ rerun the tests then ve
8092 +[?25h[?2026l[?2026h[?25lTwo details worth calling out for review:
8093 +
8094 +1
8095 +
8096 +● Editing src/context/engine.ts · 1.4s
8097 +
8098 +❯ rerun the tests then ve
8099 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
8100 +
8101 +
8102 +
8103 +❯ rerun the tests then ver
8104 +[?25h[?2026l[?2026h[?25l1. `isTra
8105 +
8106 +● Editing src/context/engine.ts · 1.5s
8107 +
8108 +
8109 +[?25h[?2026l[?2026h[?25l
8110 +
8111 +
8112 +
8113 +❯ rerun the tests then veri
8114 +[?25h[?2026l[?2026h[?25l1. `isTransient`
8115 +
8116 +
8117 +
8118 +❯ rerun the tests then verif
8119 +[?25h[?2026l[?2026h[?25l1. `isTransient` treats `
8120 +
8121 +
8122 +
8123 +
8124 +[?25h[?2026l[?2026h[?25l
8125 +
8126 +
8127 +
8128 +❯ rerun the tests then verify
8129 +[?25h[?2026l[?2026h[?25l1. `isTransient` treats `EAGAIN`,
8130 +
8131 +● Editing src/context/engine.ts · 1.6s
8132 +
8133 +
8134 +[?25h[?2026l[?2026h[?25l
8135 +
8136 +
8137 +
8138 +❯ rerun the tests then verify
8139 +[?25h[?2026l[?2026h[?25l1. `isTransient` treats `EAGAIN`, `EBUSY`
8140 +
8141 +
8142 +
8143 +
8144 +[?25h[?2026l[?2026h[?25l
8145 +
8146 +
8147 +
8148 +❯ rerun the tests then verify t
8149 +[?25h[?2026l[?2026h[?25l1. `isTransient` treats `EAGAIN`, `EBUSY` and `EI
8150 +
8151 +
8152 +
8153 +
8154 +[?25h[?2026l[?2026h[?25l
8155 +
8156 +
8157 +
8158 +❯ rerun the tests then verify th
8159 +[?25h[?2026l[?2026h[?25l1. `isTransient` treats `EAGAIN`, `EBUSY` and `EINTR` as
8160 +
8161 +● Editing src/context/engine.ts · 1.7s
8162 +
8163 +
8164 +[?25h[?2026l[?2026h[?25l
8165 +
8166 +
8167 +
8168 +❯ rerun the tests then verify the
8169 +[?25h[?2026l[?2026h[?25l1. `isTransient` treats `EAGAIN`, `EBUSY` and `EINTR` as retryabl
8170 +
8171 +
8172 +
8173 +
8174 +[?25h[?2026l[?2026h[?25l
8175 +
8176 +
8177 +
8178 +❯ rerun the tests then verify the
8179 +[?25h[?2026l[?2026h[?25l1. `isTransient` treats `EAGAIN`, `EBUSY` and `EINTR` as retryable
8180 +2. the
8181 +
8182 +● Editing src/context/engine.ts · 1.7s
8183 +
8184 +❯ rerun the tests then verify the
8185 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
8186 +
8187 +
8188 +
8189 +
8190 +❯ rerun the tests then verify the j
8191 +[?25h[?2026l[?2026h[?25l
8192 +2. the backoff
8193 +
8194 +● Editing src/context/engine.ts · 1.8s
8195 +
8196 +❯ rerun the tests then verify the jo
8197 +[?25h[?2026l[?2026h[?25l
8198 +2. the backoff delays
8199 +
8200 +
8201 +
8202 +❯ rerun the tests then verify the jou
8203 +[?25h[?2026l[?2026h[?25l
8204 +2. the backoff delays are cumu
8205 +
8206 +● Editing src/context/engine.ts · 1.9s
8207 +
8208 +❯ rerun the tests then verify the jour
8209 +[?25h[?2026l[?2026h[?25l
8210 +2. the backoff delays are cumulative w
8211 +
8212 +
8213 +
8214 +❯ rerun the tests then verify the journ
8215 +[?25h[?2026l[?2026h[?25l
8216 +2. the backoff delays are cumulative worst-cas
8217 +
8218 +
8219 +
8220 +❯ rerun the tests then verify the journa
8221 +[?25h[?2026l[?2026h[?25l
8222 +2. the backoff delays are cumulative worst-case 42 ms,
8223 +
8224 +● Editing src/context/engine.ts · 2.0s
8225 +
8226 +
8227 +[?25h[?2026l[?2026h[?25l
8228 +
8229 +
8230 +
8231 +
8232 +❯ rerun the tests then verify the journal
8233 +[?25h[?2026l[?2026h[?25l
8234 +2. the backoff delays are cumulative worst-case 42 ms, well un
8235 +
8236 +
8237 +
8238 +
8239 +[?25h[?2026l[?2026h[?25l
8240 +
8241 +
8242 +
8243 +
8244 +❯ rerun the tests then verify the journal
8245 +[?25h[?2026l[?2026h[?25l1. `isTransient` treats `EAGAIN`, `EBUSY` and `EINTR` as retryable
8246 +2. the backoff delays are cumulative worst-case 42 ms, well under
8247 + t
8248 +
8249 +● Editing src/context/engine.ts · 2.0s
8250 +
8251 +❯ rerun the tests then verify the journal
8252 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
8253 +❯ rerun the tests then verify the journal
8254 +
8255 +1. `isTransient` treats `EAGAIN`, `EBUSY` and `EINTR` as retryable
8256 +2. the backoff delays are cumulative worst-case 42 ms, well under
8257 + t
8258 +
8259 +● Editing src/context/engine.ts · 2.0s
8260 +
8261 +❯
8262 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
8263 +
8264 +
8265 +
8266 +
8267 +
8268 +❯ c
8269 +[?25h[?2026l[?2026h[?25l
8270 +
8271 + the 100 m
8272 +
8273 +● Editing src/context/engine.ts · 2.1s
8274 +
8275 +
8276 +[?25h[?2026l[?2026h[?25l
8277 +
8278 +
8279 +
8280 +
8281 +
8282 +❯ ch
8283 +[?25h[?2026l[?2026h[?25l
8284 +
8285 + the 100 ms budget
8286 +
8287 +
8288 +
8289 +❯ che
8290 +[?25h[?2026l[?2026h[?25l
8291 +
8292 + the 100 ms budget for a s
8293 +
8294 +
8295 +
8296 +
8297 +[?25h[?2026l[?2026h[?25l
8298 +
8299 +
8300 +
8301 +
8302 +
8303 +❯ chec
8304 +[?25h[?2026l[?2026h[?25l
8305 +
8306 + the 100 ms budget for a settled-e
8307 +
8308 +● Editing src/context/engine.ts · 2.2s
8309 +
8310 +
8311 +[?25h[?2026l[?2026h[?25l
8312 +
8313 +
8314 +
8315 +
8316 +
8317 +❯ check
8318 +[?25h[?2026l[?2026h[?25l
8319 +
8320 + the 100 ms budget for a settled-event flu
8321 +
8322 +
8323 +
8324 +❯ check
8325 +[?25h[?2026l[?2026h[?25l1. `isTransient` treats `EAGAIN`, `EBUSY` and `EINTR` as retryable
8326 +2. the backoff delays are cumulative worst-case 42 ms, well under
8327 + the 100 ms budget for a settled-event flush
8328 +
8329 +With
8330 +
8331 +● Editing src/context/engine.ts · 2.2s
8332 +
8333 +❯ check t
8334 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25lWith this in
8335 +
8336 +● Editing src/context/engine.ts · 2.3s
8337 +
8338 +❯ check th
8339 +[?25h[?2026l[?2026h[?25lWith this in place t
8340 +
8341 +
8342 +
8343 +❯ check the
8344 +[?25h[?2026l[?2026h[?25l
8345 +
8346 +
8347 +
8348 +❯ check the
8349 +[?25h[?2026l[?2026h[?25lWith this in place the flaky
8350 +
8351 +
8352 +
8353 +
8354 +[?25h[?2026l[?2026h[?25lWith this in place the flaky `store.
8355 +
8356 +● Editing src/context/engine.ts · 2.4s
8357 +
8358 +❯ check the s
8359 +[?25h[?2026l[?2026h[?25l
8360 +
8361 +
8362 +
8363 +❯ check the se
8364 +[?25h[?2026l[?2026h[?25lWith this in place the flaky `store.test.ts`
8365 +
8366 +
8367 +
8368 +
8369 +[?25h[?2026l[?2026h[?25lWith this in place the flaky `store.test.ts` failure
8370 +
8371 +
8372 +
8373 +❯ check the ses
8374 +[?25h[?2026l[?2026h[?25lWith this in place the flaky `store.test.ts` failures stop
8375 +r
8376 +
8377 +● Editing src/context/engine.ts · 2.5s
8378 +
8379 +❯ check the sess
8380 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
8381 +reproduci
8382 +
8383 +
8384 +
8385 +❯ check the sessi
8386 +[?25h[?2026l[?2026h[?25l
8387 +
8388 +
8389 +
8390 +
8391 +❯ check the sessio
8392 +[?25h[?2026l[?2026h[?25l
8393 +reproducing under
8394 +
8395 +
8396 +
8397 +
8398 +[?25h[?2026l[?2026h[?25l
8399 +reproducing under load, a
8400 +
8401 +● Editing src/context/engine.ts · 2.6s
8402 +
8403 +❯ check the session
8404 +[?25h[?2026l[?2026h[?25l
8405 +reproducing under load, and the a
8406 +
8407 +
8408 +
8409 +❯ check the session
8410 +[?25h[?2026l[?2026h[?25l
8411 +
8412 +
8413 +
8414 +
8415 +❯ check the session s
8416 +[?25h[?2026l[?2026h[?25l
8417 +reproducing under load, and the append pa
8418 +
8419 +
8420 +
8421 +
8422 +[?25h[?2026l[?2026h[?25l
8423 +reproducing under load, and the append path stays
8424 +
8425 +● Editing src/context/engine.ts · 2.7s
8426 +
8427 +
8428 +[?25h[?2026l[?2026h[?25l
8429 +
8430 +
8431 +
8432 +
8433 +❯ check the session st
8434 +[?25h[?2026l[?2026h[?25l
8435 +reproducing under load, and the append path stays inside
8436 +
8437 +
8438 +
8439 +❯ check the session sto
8440 +[?25h[?2026l[?2026h[?25lWith this in place the flaky `store.test.ts` failures stop
8441 +reproducing under load, and the append path stays inside the hot
8442 +
8443 +
8444 +● Editing src/context/engine.ts · 2.7s
8445 +
8446 +❯ check the session stor
8447 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
8448 +
8449 +loop bud
8450 +
8451 +● Editing src/context/engine.ts · 2.8s
8452 +
8453 +
8454 +[?25h[?2026l[?2026h[?25l
8455 +
8456 +
8457 +
8458 +
8459 +
8460 +❯ check the session store
8461 +[?25h[?2026l[?2026h[?25l
8462 +
8463 +loop budget. The
8464 +
8465 +
8466 +
8467 +❯ check the session store
8468 +[?25h[?2026l[?2026h[?25l
8469 +
8470 +loop budget. The remaini
8471 +
8472 +
8473 +
8474 +❯ check the session store r
8475 +[?25h[?2026l[?2026h[?25l
8476 +
8477 +
8478 +
8479 +● Editing src/context/engine.ts · 2.9s
8480 +
8481 +
8482 +[?25h[?2026l[?2026h[?25l
8483 +
8484 +loop budget. The remaining work
8485 +
8486 +
8487 +
8488 +❯ check the session store re
8489 +[?25h[?2026l[?2026h[?25l
8490 +
8491 +loop budget. The remaining work is to su
8492 +
8493 +
8494 +
8495 +❯ check the session store ret
8496 +[?25h[?2026l[?2026h[?25l
8497 +
8498 +loop budget. The remaining work is to surface `W
8499 +
8500 +
8501 +
8502 +❯ check the session store retr
8503 +[?25h[?2026l[?2026h[?25l
8504 +
8505 +loop budget. The remaining work is to surface `WriteFail
8506 +
8507 +● Editing src/context/engine.ts · 3.0s
8508 +
8509 +
8510 +[?25h[?2026l[?2026h[?25l
8511 +
8512 +
8513 +
8514 +
8515 +
8516 +❯ check the session store retry
8517 +[?25h[?2026l[?2026h[?25lWith this in place the flaky `store.test.ts` failures stop
8518 +reproducing under load, and the append path stays inside the hot
8519 +loop budget. The remaining work is to surface `WriteFailed` in
8520 +t
8521 +
8522 +● Editing src/context/engine.ts · 3.0s
8523 +
8524 +❯ check the session store retry
8525 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
8526 +
8527 +
8528 +
8529 +
8530 +
8531 +
8532 +❯ check the session store retry
8533 +[?25h[?2026l[?2026h[?25l
8534 +
8535 +
8536 +the statu
8537 +
8538 +
8539 +
8540 +❯ check the session store retry l
8541 +[?25h[?2026l[?2026h[?25l
8542 +
8543 +
8544 +the status bar so
8545 +
8546 +● Editing src/context/engine.ts · 3.1s
8547 +
8548 +
8549 +[?25h[?2026l[?2026h[?25l
8550 +
8551 +
8552 +
8553 +
8554 +
8555 +
8556 +❯ check the session store retry lo
8557 +[?25h[?2026l[?2026h[?25l
8558 +
8559 +
8560 +the status bar so a dying
8561 +
8562 +
8563 +
8564 +
8565 +[?25h[?2026l[?2026h[?25l
8566 +
8567 +
8568 +
8569 +
8570 +
8571 +
8572 +❯ check the session store retry log
8573 +[?25h[?2026l[?2026h[?25l
8574 +
8575 +
8576 +the status bar so a dying disk is
8577 +
8578 +
8579 +
8580 +
8581 +[?25h[?2026l[?2026h[?25l
8582 +
8583 +
8584 +
8585 +
8586 +
8587 +
8588 +❯ check the session store retry logi
8589 +[?25h[?2026l[?2026h[?25l
8590 +
8591 +
8592 +the status bar so a dying disk is visible
8593 +
8594 +● Editing src/context/engine.ts · 3.2s
8595 +
8596 +
8597 +[?25h[?2026l[?2026h[?25l
8598 +
8599 +
8600 +
8601 +
8602 +
8603 +
8604 +❯ check the session store retry logic
8605 +[?25h[?2026l[?2026h[?25l
8606 +
8607 +
8608 +the status bar so a dying disk is visible before
8609 +
8610 +
8611 +
8612 +
8613 +[?25h[?2026l[?2026h[?25l
8614 +
8615 +
8616 +
8617 +
8618 +
8619 +
8620 +❯ check the session store retry logic
8621 +[?25h[?2026l[?2026h[?25l
8622 +
8623 +
8624 +the status bar so a dying disk is visible before data is
8625 +
8626 +
8627 +
8628 +❯ check the session store retry logic a
8629 +[?25h[?2026l[?2026h[?25lWith this in place the flaky `store.test.ts` failures stop
8630 +reproducing under load, and the append path stays inside the hot
8631 +loop budget. The remaining work is to surface `WriteFailed` in
8632 +the status bar so a dying disk is visible before data is lost.
8633 +
8634 +
8635 +● Editing src/context/engine.ts · 3.3s
8636 +
8637 +❯ check the session store retry logic a
8638 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
8639 +
8640 +
8641 +
8642 +
8643 +
8644 +
8645 +
8646 +❯ check the session store retry logic an
8647 +[?25h[?2026l[?2026h[?25lWith this in place the flaky `store.test.ts` failures stop
8648 +reproducing under load, and the append path stays inside the hot
8649 +loop budget. The remaining work is to surface `WriteFailed` in
8650 +the status bar so a dying disk is visible before data is lost.
8651 +
8652 + ▸ Run npm test · passed · 4.2s
8653 +
8654 +❯ check the session store retry logic and
8655 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l ❯ check the session store retry logic and
8656 +[?25h[?2026l[?2026h[?25l 
8657 +❯ check the session store retry logic and
8658 +
8659 +❯
8660 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l ❯ r
8661 +[?25h[?2026l[?2026h[?25l ❯ re
8662 +[?25h[?2026l[?2026h[?25l ❯ rer
8663 +[?25h[?2026l[?2026h[?25l ❯ reru
8664 +[?25h[?2026l[?2026h[?25l ❯ rerun
8665 +[?25h[?2026l[?2026h[?25l ❯ rerun
8666 +[?25h[?2026l[?2026h[?25l ❯ rerun t
8667 +[?25h[?2026l[?2026h[?25l ❯ rerun th
8668 +[?25h[?2026l[?2026h[?25l ❯ rerun the
8669 +[?25h[?2026l[?2026h[?25l ❯ rerun the
8670 +[?25h[?2026l[?2026h[?25l ❯ rerun the t
8671 +[?25h[?2026l[?2026h[?25l ❯ rerun the te
8672 +[?25h[?2026l[?2026h[?25l ❯ rerun the tes
8673 +[?25h[?2026l[?2026h[?25l ❯ rerun the test
8674 +[?25h[?2026l[?2026h[?25l ❯ rerun the tests
8675 +[?25h[?2026l[?2026h[?25l ❯ rerun the tests
8676 +[?25h[?2026l[?2026h[?25l ❯ rerun the tests t
8677 +[?25h[?2026l[?2026h[?25l ❯ rerun the tests th
8678 +[?25h[?2026l[?2026h[?25l ❯ rerun the tests the
8679 +[?25h[?2026l[?2026h[?25l ● Reading src/session/store.ts · 0.0s
8680 +
8681 +❯ rerun the tests the
8682 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
8683 +
8684 +❯ rerun the tests then
8685 +[?25h[?2026l[?2026h[?25l
8686 +
8687 +❯ rerun the tests then
8688 +[?25h[?2026l[?2026h[?25l● Reading src/session/store.ts · 0.1s
8689 +
8690 +
8691 +[?25h[?2026l[?2026h[?25l
8692 +
8693 +❯ rerun the tests then v
8694 +[?25h[?2026l[?2026h[?25l
8695 +
8696 +❯ rerun the tests then ve
8697 +[?25h[?2026l[?2026h[?25l
8698 +
8699 +❯ rerun the tests then ver
8700 +[?25h[?2026l[?2026h[?25l● Reading src/session/store.ts · 0.2s
8701 +
8702 +
8703 +[?25h[?2026l[?2026h[?25l
8704 +
8705 +❯ rerun the tests then veri
8706 +[?25h[?2026l[?2026h[?25l
8707 +
8708 +❯ rerun the tests then verif
8709 +[?25h[?2026l[?2026h[?25l
8710 +
8711 +❯ rerun the tests then verify
8712 +[?25h[?2026l[?2026h[?25l● Reading src/session/store.ts · 0.3s
8713 +
8714 +
8715 +[?25h[?2026l[?2026h[?25l
8716 +
8717 +❯ rerun the tests then verify
8718 +[?25h[?2026l[?2026h[?25l
8719 +
8720 +❯ rerun the tests then verify t
8721 +[?25h[?2026l[?2026h[?25l● Reading src/session/store.ts · 0.4s
8722 +
8723 +❯ rerun the tests then verify th
8724 +[?25h[?2026l[?2026h[?25l
8725 +
8726 +
8727 +[?25h[?2026l[?2026h[?25l
8728 +
8729 +❯ rerun the tests then verify the
8730 +[?25h[?2026l[?2026h[?25l
8731 +
8732 +❯ rerun the tests then verify the
8733 +[?25h[?2026l[?2026h[?25l● Reading src/session/store.ts · 0.5s
8734 +
8735 +❯ rerun the tests then verify the j
8736 +[?25h[?2026l[?2026h[?25l
8737 +
8738 +
8739 +[?25h[?2026l[?2026h[?25l
8740 +
8741 +❯ rerun the tests then verify the jo
8742 +[?25h[?2026l[?2026h[?25l ▸ Read src/session/store.ts · 212 lines
8743 +● Reading src/session/store.ts · 0.5s
8744 +
8745 +❯ rerun the tests then verify the jo
8746 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
8747 +
8748 +❯ rerun the tests then verify the jou
8749 +[?25h[?2026l[?2026h[?25l● Reading src/session/store.ts · 0.6s
8750 +
8751 +❯ rerun the tests then verify the jour
8752 +[?25h[?2026l[?2026h[?25l
8753 +
8754 +
8755 +[?25h[?2026l[?2026h[?25l
8756 +
8757 +❯ rerun the tests then verify the journ
8758 +[?25h[?2026l[?2026h[?25l
8759 +
8760 +❯ rerun the tests then verify the journa
8761 +[?25h[?2026l[?2026h[?25l● Reading src/session/store.ts · 0.7s
8762 +
8763 +❯ rerun the tests then verify the journal
8764 +[?25h[?2026l[?2026h[?25l
8765 +
8766 +
8767 +[?25h[?2026l[?2026h[?25l
8768 +
8769 +❯ rerun the tests then verify the journal
8770 +[?25h[?2026l[?2026h[?25l
8771 +❯ rerun the tests then verify the journal
8772 +
8773 +● Reading src/session/store.ts · 0.7s
8774 +
8775 +❯
8776 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
8777 +
8778 +❯ c
8779 +[?25h[?2026l[?2026h[?25l ▸ Search "retry" · 6 matches
8780 +● Thinking · 0.0s
8781 +
8782 +❯ c
8783 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
8784 +
8785 +❯ ch
8786 +[?25h[?2026l[?2026h[?25l
8787 +
8788 +
8789 +[?25h[?2026l[?2026h[?25l
8790 +
8791 +❯ che
8792 +[?25h[?2026l[?2026h[?25l● Thinking · 0.1s
8793 +
8794 +❯ chec
8795 +[?25h[?2026l[?2026h[?25l
8796 +
8797 +❯ check
8798 +[?25h[?2026l[?2026h[?25l
8799 +
8800 +
8801 +[?25h[?2026l[?2026h[?25l
8802 +
8803 +❯ check
8804 +[?25h[?2026l[?2026h[?25l● Thinking · 0.2s
8805 +
8806 +❯ check t
8807 +[?25h[?2026l[?2026h[?25l
8808 +
8809 +❯ check th
8810 +[?25h[?2026l[?2026h[?25l
8811 +
8812 +
8813 +[?25h[?2026l[?2026h[?25l
8814 +
8815 +❯ check the
8816 +[?25h[?2026l[?2026h[?25l● Thinking · 0.3s
8817 +
8818 +❯ check the
8819 +[?25h[?2026l[?2026h[?25l
8820 +
8821 +❯ check the s
8822 +[?25h[?2026l[?2026h[?25l
8823 +
8824 +
8825 +[?25h[?2026l[?2026h[?25l
8826 +
8827 +❯ check the se
8828 +[?25h[?2026l[?2026h[?25l● Thinking · 0.4s
8829 +
8830 +❯ check the ses
8831 +[?25h[?2026l[?2026h[?25l## Sessi
8832 +
8833 +● Writing · 0.0s
8834 +
8835 +❯ check the ses
8836 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
8837 +
8838 +
8839 +
8840 +❯ check the sess
8841 +[?25h[?2026l[?2026h[?25l
8842 +
8843 +
8844 +
8845 +
8846 +[?25h[?2026l[?2026h[?25l## Session store
8847 +
8848 +
8849 +
8850 +❯ check the sessi
8851 +[?25h[?2026l[?2026h[?25l## Session store retry l
8852 +
8853 +● Writing · 0.1s
8854 +
8855 +
8856 +[?25h[?2026l[?2026h[?25l
8857 +
8858 +
8859 +
8860 +❯ check the sessio
8861 +[?25h[?2026l[?2026h[?25l## Session store retry logic
8862 +
8863 +Th
8864 +
8865 +● Writing · 0.1s
8866 +
8867 +❯ check the sessio
8868 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
8869 +
8870 +
8871 +
8872 +❯ check the session
8873 +[?25h[?2026l[?2026h[?25l
8874 +
8875 +
8876 +
8877 +
8878 +[?25h[?2026l[?2026h[?25lThe failur
8879 +
8880 +
8881 +
8882 +❯ check the session
8883 +[?25h[?2026l[?2026h[?25lThe failure point
8884 +
8885 +● Writing · 0.2s
8886 +
8887 +
8888 +[?25h[?2026l[?2026h[?25l
8889 +
8890 +
8891 +
8892 +❯ check the session s
8893 +[?25h[?2026l[?2026h[?25lThe failure point is in `S
8894 +
8895 +
8896 +
8897 +
8898 +[?25h[?2026l[?2026h[?25l
8899 +
8900 +
8901 +
8902 +❯ check the session st
8903 +[?25h[?2026l[?2026h[?25l
8904 +
8905 +
8906 +
8907 +
8908 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionSt
8909 +
8910 +
8911 +
8912 +❯ check the session sto
8913 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.appe
8914 +
8915 +● Writing · 0.3s
8916 +
8917 +
8918 +[?25h[?2026l[?2026h[?25l
8919 +
8920 +
8921 +
8922 +❯ check the session stor
8923 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.append` — jo
8924 +
8925 +
8926 +
8927 +
8928 +[?25h[?2026l[?2026h[?25l
8929 +
8930 +
8931 +
8932 +❯ check the session store
8933 +[?25h[?2026l[?2026h[?25l
8934 +
8935 +
8936 +
8937 +
8938 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.append` — journal wr
8939 +
8940 +
8941 +
8942 +❯ check the session store
8943 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.append` — journal writes are
8944 +
8945 +● Writing · 0.4s
8946 +
8947 +❯ check the session store r
8948 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.append` — journal writes are
8949 +not ret
8950 +
8951 +● Writing · 0.4s
8952 +
8953 +❯ check the session store re
8954 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
8955 +
8956 +
8957 +
8958 +
8959 +
8960 +[?25h[?2026l[?2026h[?25l
8961 +not retried on
8962 +
8963 +
8964 +
8965 +❯ check the session store ret
8966 +[?25h[?2026l[?2026h[?25l
8967 +not retried on transien
8968 +
8969 +● Writing · 0.5s
8970 +
8971 +❯ check the session store retr
8972 +[?25h[?2026l[?2026h[?25l
8973 +
8974 +
8975 +
8976 +
8977 +❯ check the session store retry
8978 +[?25h[?2026l[?2026h[?25l
8979 +not retried on transient `EAGAI
8980 +
8981 +
8982 +
8983 +
8984 +[?25h[?2026l[?2026h[?25l
8985 +
8986 +
8987 +
8988 +
8989 +❯ check the session store retry
8990 +[?25h[?2026l[?2026h[?25l
8991 +not retried on transient `EAGAIN`, so a
8992 +
8993 +● Writing · 0.6s
8994 +
8995 +
8996 +[?25h[?2026l[?2026h[?25l
8997 +not retried on transient `EAGAIN`, so a busy fi
8998 +
8999 +
9000 +
9001 +❯ check the session store retry l
9002 +[?25h[?2026l[?2026h[?25l
9003 +not retried on transient `EAGAIN`, so a busy filesystem
9004 +
9005 +
9006 +
9007 +❯ check the session store retry lo
9008 +[?25h[?2026l[?2026h[?25l
9009 +
9010 +
9011 +
9012 +
9013 +
9014 +[?25h[?2026l[?2026h[?25l
9015 +not retried on transient `EAGAIN`, so a busy filesystem drops t
9016 +
9017 +
9018 +
9019 +❯ check the session store retry log
9020 +[?25h[?2026l[?2026h[?25l
9021 +
9022 +
9023 +● Writing · 0.7s
9024 +
9025 +❯ check the session store retry logi
9026 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.append` — journal writes are
9027 +not retried on transient `EAGAIN`, so a busy filesystem drops the
9028 +event
9029 +
9030 +● Writing · 0.7s
9031 +
9032 +❯ check the session store retry logi
9033 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
9034 +
9035 +event and the
9036 +
9037 +
9038 +
9039 +❯ check the session store retry logic
9040 +[?25h[?2026l[?2026h[?25l
9041 +
9042 +
9043 +
9044 +
9045 +
9046 +
9047 +[?25h[?2026l[?2026h[?25l
9048 +
9049 +event and the session
9050 +
9051 +
9052 +
9053 +❯ check the session store retry logic
9054 +[?25h[?2026l[?2026h[?25l
9055 +
9056 +event and the session log div
9057 +
9058 +● Writing · 0.8s
9059 +
9060 +❯ check the session store retry logic a
9061 +[?25h[?2026l[?2026h[?25l
9062 +
9063 +
9064 +
9065 +
9066 +
9067 +❯ check the session store retry logic an
9068 +[?25h[?2026l[?2026h[?25l
9069 +
9070 +event and the session log diverges fr
9071 +
9072 +
9073 +
9074 +
9075 +[?25h[?2026l[?2026h[?25l
9076 +
9077 +event and the session log diverges from what
9078 +
9079 +
9080 +
9081 +
9082 +[?25h[?2026l[?2026h[?25l
9083 +
9084 +
9085 +
9086 +
9087 +
9088 +❯ check the session store retry logic and
9089 +[?25h[?2026l[?2026h[?25l
9090 +
9091 +event and the session log diverges from what the user
9092 +
9093 +● Writing · 0.9s
9094 +
9095 +❯ check the session store retry logic and
9096 +[?25h[?2026l[?2026h[?25l
9097 +❯ check the session store retry logic and
9098 +
9099 +The failure point is in `SessionStore.append` — journal writes are
9100 +not retried on transient `EAGAIN`, so a busy filesystem drops the
9101 +event and the session log diverges from what the user saw on
9102 +
9103 +
9104 +● Writing · 0.9s
9105 +
9106 +❯
9107 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
9108 +
9109 +
9110 +
9111 +
9112 +
9113 +
9114 +❯ r
9115 +[?25h[?2026l[?2026h[?25l
9116 +
9117 +
9118 +
9119 +
9120 +
9121 +
9122 +
9123 +[?25h[?2026l[?2026h[?25l
9124 +
9125 +
9126 +
9127 +
9128 +
9129 +
9130 +❯ re
9131 +[?25h[?2026l[?2026h[?25l
9132 +
9133 +
9134 +screen.
9135 +
9136 +● Writing · 1.0s
9137 +
9138 +
9139 +[?25h[?2026l[?2026h[?25l
9140 +
9141 +
9142 +screen. The fix
9143 +
9144 +
9145 +
9146 +❯ rer
9147 +[?25h[?2026l[?2026h[?25l
9148 +
9149 +
9150 +
9151 +
9152 +
9153 +
9154 +❯ reru
9155 +[?25h[?2026l[?2026h[?25l
9156 +
9157 +
9158 +screen. The fix wraps th
9159 +
9160 +
9161 +
9162 +
9163 +[?25h[?2026l[?2026h[?25l
9164 +
9165 +
9166 +
9167 +
9168 +
9169 +
9170 +❯ rerun
9171 +[?25h[?2026l[?2026h[?25l
9172 +
9173 +
9174 +screen. The fix wraps the journa
9175 +
9176 +● Writing · 1.1s
9177 +
9178 +
9179 +[?25h[?2026l[?2026h[?25l
9180 +
9181 +
9182 +screen. The fix wraps the journal write
9183 +
9184 +
9185 +
9186 +❯ rerun
9187 +[?25h[?2026l[?2026h[?25l
9188 +
9189 +
9190 +
9191 +
9192 +
9193 +
9194 +❯ rerun t
9195 +[?25h[?2026l[?2026h[?25l
9196 +
9197 +
9198 +screen. The fix wraps the journal write in a bou
9199 +
9200 +
9201 +
9202 +
9203 +[?25h[?2026l[?2026h[?25l
9204 +
9205 +
9206 +
9207 +
9208 +
9209 +
9210 +
9211 +[?25h[?2026l[?2026h[?25l
9212 +
9213 +
9214 +screen. The fix wraps the journal write in a bounded ret
9215 +
9216 +
9217 +
9218 +❯ rerun th
9219 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.append` — journal writes are
9220 +not retried on transient `EAGAIN`, so a busy filesystem drops the
9221 +event and the session log diverges from what the user saw on
9222 +screen. The fix wraps the journal write in a bounded retry loop
9223 +
9224 +
9225 +● Writing · 1.2s
9226 +
9227 +❯ rerun th
9228 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
9229 +
9230 +
9231 +
9232 +
9233 +
9234 +
9235 +
9236 +❯ rerun the
9237 +[?25h[?2026l[?2026h[?25l
9238 +
9239 +
9240 +
9241 +with exp
9242 +
9243 +
9244 +
9245 +
9246 +[?25h[?2026l[?2026h[?25l
9247 +
9248 +
9249 +
9250 +
9251 +
9252 +
9253 +
9254 +❯ rerun the
9255 +[?25h[?2026l[?2026h[?25l
9256 +
9257 +
9258 +
9259 +
9260 +
9261 +
9262 +
9263 +
9264 +[?25h[?2026l[?2026h[?25l
9265 +
9266 +
9267 +
9268 +with exponential
9269 +
9270 +● Writing · 1.3s
9271 +
9272 +❯ rerun the t
9273 +[?25h[?2026l[?2026h[?25l
9274 +
9275 +
9276 +
9277 +with exponential backoff
9278 +
9279 +
9280 +
9281 +
9282 +[?25h[?2026l[?2026h[?25l
9283 +
9284 +
9285 +
9286 +
9287 +
9288 +
9289 +
9290 +❯ rerun the te
9291 +[?25h[?2026l[?2026h[?25l
9292 +
9293 +
9294 +
9295 +with exponential backoff, and ke
9296 +
9297 +
9298 +
9299 +
9300 +[?25h[?2026l[?2026h[?25l
9301 +
9302 +
9303 +
9304 +
9305 +
9306 +
9307 +
9308 +❯ rerun the tes
9309 +[?25h[?2026l[?2026h[?25l
9310 +
9311 +
9312 +
9313 +
9314 +
9315 +
9316 +
9317 +
9318 +[?25h[?2026l[?2026h[?25l
9319 +
9320 +
9321 +
9322 +
9323 +
9324 +● Writing · 1.4s
9325 +
9326 +❯ rerun the test
9327 +[?25h[?2026l[?2026h[?25l
9328 +
9329 +
9330 +
9331 +with exponential backoff, and keeps the
9332 +
9333 +
9334 +
9335 +
9336 +[?25h[?2026l[?2026h[?25l
9337 +
9338 +
9339 +
9340 +with exponential backoff, and keeps the event lo
9341 +
9342 +
9343 +
9344 +❯ rerun the tests
9345 +[?25h[?2026l[?2026h[?25l
9346 +
9347 +
9348 +
9349 +
9350 +
9351 +
9352 +
9353 +❯ rerun the tests
9354 +[?25h[?2026l[?2026h[?25l
9355 +
9356 +
9357 +
9358 +with exponential backoff, and keeps the event log append
9359 +
9360 +
9361 +
9362 +
9363 +[?25h[?2026l[?2026h[?25l
9364 +
9365 +
9366 +
9367 +
9368 +
9369 +● Writing · 1.5s
9370 +
9371 +❯ rerun the tests t
9372 +[?25h[?2026l[?2026h[?25lThe failure point is in `SessionStore.append` — journal writes are
9373 +not retried on transient `EAGAIN`, so a busy filesystem drops the
9374 +event and the session log diverges from what the user saw on
9375 +screen. The fix wraps the journal write in a bounded retry loop
9376 +with exponential backoff, and keeps the event log append-only.
9377 +
9378 +● Writing · 1.5s
9379 +
9380 +❯ rerun the tests t
9381 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25lKey chan
9382 +
9383 +● Writing · 1.5s
9384 +
9385 +❯ rerun the tests th
9386 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
9387 +
9388 +
9389 +
9390 +❯ rerun the tests the
9391 +[?25h[?2026l[?2026h[?25lKey changes:
9392 +
9393 +-
9394 +
9395 +● Writing · 1.5s
9396 +
9397 +❯ rerun the tests the
9398 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
9399 +
9400 +● Writing · 1.6s
9401 +
9402 +
9403 +[?25h[?2026l[?2026h[?25l- `append`
9404 +
9405 +
9406 +
9407 +❯ rerun the tests then
9408 +[?25h[?2026l[?2026h[?25l- `append` now ret
9409 +
9410 +
9411 +
9412 +❯ rerun the tests then
9413 +[?25h[?2026l[?2026h[?25l- `append` now retries up
9414 +
9415 +
9416 +
9417 +❯ rerun the tests then v
9418 +[?25h[?2026l[?2026h[?25l
9419 +
9420 +
9421 +
9422 +
9423 +[?25h[?2026l[?2026h[?25l
9424 +
9425 +● Writing · 1.7s
9426 +
9427 +❯ rerun the tests then ve
9428 +[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 tim
9429 +
9430 +
9431 +
9432 +
9433 +[?25h[?2026l[?2026h[?25l
9434 +
9435 +
9436 +
9437 +❯ rerun the tests then ver
9438 +[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 times on `E
9439 +
9440 +
9441 +
9442 +
9443 +[?25h[?2026l[?2026h[?25l
9444 +
9445 +
9446 +
9447 +❯ rerun the tests then veri
9448 +[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 times on `EAGAIN` /
9449 +
9450 +
9451 +
9452 +
9453 +[?25h[?2026l[?2026h[?25l
9454 +
9455 +● Writing · 1.8s
9456 +
9457 +❯ rerun the tests then verif
9458 +[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 times on `EAGAIN` / `EBUSY`
9459 +
9460 +
9461 +
9462 +
9463 +[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 times on `EAGAIN` / `EBUSY`
9464 +- backo
9465 +
9466 +● Writing · 1.8s
9467 +
9468 +❯ rerun the tests then verify
9469 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
9470 +- backoff is 2
9471 +
9472 +
9473 +
9474 +
9475 +[?25h[?2026l[?2026h[?25l
9476 +
9477 +
9478 +
9479 +
9480 +❯ rerun the tests then verify
9481 +[?25h[?2026l[?2026h[?25l
9482 +
9483 +
9484 +
9485 +
9486 +
9487 +[?25h[?2026l[?2026h[?25l
9488 +- backoff is 2 ms, 8 ms
9489 +
9490 +● Writing · 1.9s
9491 +
9492 +❯ rerun the tests then verify t
9493 +[?25h[?2026l[?2026h[?25l
9494 +- backoff is 2 ms, 8 ms, 32 ms
9495 +
9496 +
9497 +
9498 +
9499 +[?25h[?2026l[?2026h[?25l
9500 +
9501 +
9502 +
9503 +
9504 +❯ rerun the tests then verify th
9505 +[?25h[?2026l[?2026h[?25l
9506 +- backoff is 2 ms, 8 ms, 32 ms — bounde
9507 +
9508 +
9509 +
9510 +
9511 +[?25h[?2026l[?2026h[?25l
9512 +
9513 +
9514 +
9515 +
9516 +❯ rerun the tests then verify the
9517 +[?25h[?2026l[?2026h[?25l
9518 +
9519 +
9520 +
9521 +
9522 +
9523 +[?25h[?2026l[?2026h[?25l
9524 +- backoff is 2 ms, 8 ms, 32 ms — bounded, never
9525 +
9526 +● Writing · 2.0s
9527 +
9528 +❯ rerun the tests then verify the
9529 +[?25h[?2026l[?2026h[?25l
9530 +- backoff is 2 ms, 8 ms, 32 ms — bounded, never user-vi
9531 +
9532 +
9533 +
9534 +
9535 +[?25h[?2026l[?2026h[?25l
9536 +
9537 +
9538 +
9539 +
9540 +❯ rerun the tests then verify the j
9541 +[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 times on `EAGAIN` / `EBUSY`
9542 +- backoff is 2 ms, 8 ms, 32 ms — bounded, never user-visible
9543 +-
9544 +
9545 +● Writing · 2.0s
9546 +
9547 +❯ rerun the tests then verify the j
9548 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
9549 +
9550 +
9551 +
9552 +
9553 +
9554 +❯ rerun the tests then verify the jo
9555 +[?25h[?2026l[?2026h[?25l
9556 +
9557 +
9558 +
9559 +
9560 +
9561 +
9562 +[?25h[?2026l[?2026h[?25l
9563 +
9564 +- a `Write
9565 +
9566 +● Writing · 2.1s
9567 +
9568 +❯ rerun the tests then verify the jou
9569 +[?25h[?2026l[?2026h[?25l
9570 +
9571 +- a `WriteFailed`
9572 +
9573 +
9574 +
9575 +
9576 +[?25h[?2026l[?2026h[?25l
9577 +
9578 +
9579 +
9580 +
9581 +
9582 +❯ rerun the tests then verify the jour
9583 +[?25h[?2026l[?2026h[?25l
9584 +
9585 +- a `WriteFailed` event is
9586 +
9587 +
9588 +
9589 +❯ rerun the tests then verify the journ
9590 +[?25h[?2026l[?2026h[?25l
9591 +
9592 +
9593 +
9594 +
9595 +
9596 +
9597 +[?25h[?2026l[?2026h[?25l
9598 +
9599 +
9600 +
9601 +● Writing · 2.2s
9602 +
9603 +❯ rerun the tests then verify the journa
9604 +[?25h[?2026l[?2026h[?25l
9605 +
9606 +- a `WriteFailed` event is emitted
9607 +
9608 +
9609 +
9610 +
9611 +[?25h[?2026l[?2026h[?25l
9612 +
9613 +
9614 +
9615 +
9616 +
9617 +❯ rerun the tests then verify the journal
9618 +[?25h[?2026l[?2026h[?25l
9619 +
9620 +- a `WriteFailed` event is emitted only af
9621 +
9622 +
9623 +
9624 +
9625 +[?25h[?2026l[?2026h[?25l
9626 +
9627 +- a `WriteFailed` event is emitted only after the
9628 +
9629 +
9630 +
9631 +❯ rerun the tests then verify the journal
9632 +[?25h[?2026l[?2026h[?25l
9633 +
9634 +
9635 +
9636 +● Writing · 2.3s
9637 +
9638 +
9639 +[?25h[?2026l[?2026h[?25l
9640 +❯ rerun the tests then verify the journal
9641 +
9642 +- `append` now retries up to 3 times on `EAGAIN` / `EBUSY`
9643 +- backoff is 2 ms, 8 ms, 32 ms — bounded, never user-visible
9644 +- a `WriteFailed` event is emitted only after the final at
9645 +
9646 +● Writing · 2.3s
9647 +
9648 +❯
9649 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
9650 +
9651 +
9652 +
9653 +
9654 +
9655 +❯ c
9656 +[?25h[?2026l[?2026h[?25l
9657 +
9658 +
9659 +
9660 +
9661 +
9662 +❯ ch
9663 +[?25h[?2026l[?2026h[?25l- `append` now retries up to 3 times on `EAGAIN` / `EBUSY`
9664 +- backoff is 2 ms, 8 ms, 32 ms — bounded, never user-visible
9665 +- a `WriteFailed` event is emitted only after the final attempt
9666 +-
9667 +
9668 +● Writing · 2.3s
9669 +
9670 +❯ ch
9671 + main +2 −0 │ claude-sonnet │ context 31% │ $0.42[?25h[?2026l[?2026h[?25l
9672 +
9673 +
9674 +
9675 +
9676 +
9677 +
9678 +❯ che
9679 +[?25h[?2026l[?2026h[?25l
9680 +
9681 +
9682 +- no parti
9683 +
9684 +
9685 +
9686 +
9687 +[?25h[?2026l[?2026h[?25l
9688 +
9689 +
9690 +
9691 +
9692 +● Writing · 2.4s
9693 +
9694 +
9695 +[?25h[?2026l[?2026h[?25l
9696 +
9697 +
9698 +- no partial frame
9699 +
9700 +
9701 +
9702 +❯ chec
9703 +[?25h[?2026l[?2026h[?25l
9704 +
9705 +
9706 +- no partial frames are ev

Diff truncated — file too large.