feat: SPB Git 2.0 — design system (light/dark/midnight), mobile-first AppShell, core screens, streamed raw files, bounded git concurrency, stamp-validated caches, scoped search · c6f115a · spbgit

feat: SPB Git 2.0 — design system (light/dark/midnight), mobile-first AppShell, core screens, streamed raw files, bounded git concurrency, stamp-validated caches, scoped search

Phase 0–2 of docs/SPBGIT-2-PLAN.md. Fixes the production memory-restart loop
(unbuffered /raw, metadata-only blob probes, 12-way git semaphore), the stale
all-time commit total (overview cache validated against live refs), the
600 MB request log (completion-only logging), and the 24 px horizontal
overflow on every phone page. Adds /about/metrics, /api/v1/search,
/api/v1/repos/:name/tree, split diffs, lazy file tree, clone sheet.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

Simon-Pierre Boucher committed 8 days ago (Nov 1, 2026) parent 810e402 Browse files

72 changed files +4,282 −1,865

added docs/SPBGIT-2-PLAN.md +176 −0

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	1	+<!--
	2	+ ─────────────────────────────────────────────
	3	+ SPB Git — Personal Git Platform
	4	+ ─────────────────────────────────────────────
	5	+ Author : Simon-Pierre Boucher
	6	+ Contact : contact@spboucher.ai
	7	+ File : docs/SPBGIT-2-PLAN.md
	8	+ Purpose : SPB Git 2.0 — architecture, feature inventory, risks, phased plan, acceptance criteria
	9	+ License : MIT © Simon-Pierre Boucher
	10	+ ─────────────────────────────────────────────
	11	+-->
	12	+# SPB Git 2.0 — The Intelligent Git Forge · Plan
	13	+
	14	+Written 2026-11-01 after Phase 0 (reconnaissance) on the real repository
	15	+(`spbgit` 1.1.0, commit `810e402`, deployed on M1M32 `~/srv/spbgit/app`,
	16	+public at https://git.spboucher.ai through the MacLustr Tunnel).
	17	+
	18	+## 1. Architecture as found
	19	+
	20	+\| Layer \| Implementation \| Notes \|
	21	+\|---\|---\|---\|
	22	+\| Runtime \| Node ≥ 20 (25.9 on M1M32), ESM, Fastify 5, pino \| PM2 `spbgit-server`, port 7420, loopback; TLS at the BHS64 gateway \|
	23	+\| Git hosting \| `src/git/smart-http.mjs` spawns `git upload-pack / receive-pack --stateless-rpc`, streamed, gzip bodies \| Anonymous clone/fetch, PAT (argon2id) for push, HTTP Basic user `spb` \|
	24	+\| Repo model \| `src/git/repo.mjs` shells out to `git` (refs, tree, blob, log, diff parser, blame, archive) \| `maxBuffer` 64 MB per call, blobs fully buffered \|
	25	+\| Storage \| bare repos `~/srv/git/*.git` (157), `data/meta.json` (desc/topics/pins), `data/activity.jsonl`, `data/clones.json`, `data/tokens.json`, `data/releases/` \| filesystem is the database \|
	26	+\| Cache \| `~/srv/spbgit/cache/repos/<repo>/<sha>/`, `repos/<repo>/_repo/overview-v4.json`, `global/` \| post-receive hook POSTs to `/internal/hooks/post-receive` (loopback only) → busts repo + global \|
	27	+\| Rendering \| Nunjucks SSR (`src/web/views`), hand-written CSS (`tokens.css`, `app.css`, `markdown.css`), vanilla JS (`app.js`, `theme-boot.js`), shiki dual-theme, markdown-it + sanitize-html, satori/resvg OG cards \| No bundler, no framework, CSP `script-src 'self'` (no inline JS) \|
	28	+\| API \| `/api/v1/` public reads, Bearer PAT writes, `/healthz`, `/feed.atom`, `/sitemap.xml`, `/og/.png`, `/raw/`, `/archive/`, `/releases/*` \| JSON error envelope, rate limit 200/min/IP \|
	29	+\| CLI \| `cli/spbgit.mjs` (commander) \| untouched by this plan \|
	30	+\| Tests \| vitest: 6 unit files + 1 e2e (real `git push` round trip, releases) — 59/59 green at baseline; `eslint`, `check:headers` green \| no browser tests yet \|
	31	+\| Deploy \| `mld` manifest `M1M32:~/dispatch/apps/spbgit.json` (pinned to M1M32), PM2 `max_memory_restart 750M`, nightly `deploy/backup.sh` \| ngrok removed 2026-09-10; `deploy/ecosystem.config.cjs` still documents a tunnel app (dead) \|
	32	+
	33	+Visibility model (CLAUDE.md §0): every repository is public, read-only; the
	34	+only writes are owner PAT operations through the API/CLI. The web UI has no
	35	+login and no authenticated action by design — "authenticated actions on a phone"
	36	+therefore means: clone URLs, release downloads and the public API, all of which
	37	+must work from Safari/iOS. This plan does not add a web login.
	38	+
	39	+## 2. Feature inventory (existing — must keep working)
	40	+
	41	+Home (hero, stats, pinned bento, repo grid with sparklines + client filters,
	42	+activity feed, language ring, heatmap) · Repo overview (header, 6 stat tiles,
	43	+language bar, tabs, branch select, clone box, zip/tar.gz, file table with last
	44	+commit, README + TOC) · Tree · Blob (shiki, line anchors + ranges, wrap, copy,
	45	+raw, blame, history, permalink, markdown render/source, images, PDF inline,
	46	+binaries, notebooks as JSON) · Commits (grouped by day, stats, pagination,
	47	+path filter) · Commit (diff with per-hunk highlighting, file nav, rename/binary)
	48	+· Blame (age-coloured) · Branches (ahead/behind) · Tags/releases (assets with
	49	+sha256) · Search (names/desc/topics/README) · ⌘K palette (repos + commands) ·
	50	+OG images, favicon, sitemap, robots, Atom · 404/500 · Smart HTTP · API v1 ·
	51	+releases upload · hooks · CLI.
	52	+
	53	+## 3. Baseline measurements (2026-11-01, production, Playwright Chromium)
	54	+
	55	+Mobile = 375×812, CPU ×4, ~1.6 Mb/s. Desktop = 1440×900, no throttling.
	56	+
	57	+\| Page \| Mobile LCP \| Mobile TTFB \| Desktop LCP \| HTML \| CSS \| JS \| Fonts \|
	58	+\|---\|---\|---\|---\|---\|---\|---\|---\|
	59	+\| `/` \| 1 216 ms \| 182 ms \| 320 ms \| 34 KB \| 18.7 KB \| 9 KB \| 209 KB (5 files preloaded) \|
	60	+\| `/spbgit` \| 276 ms \| 144 ms \| 236 ms \| 9.7 KB \| cached \| cached \| cached \|
	61	+\| blob `src/server.mjs` \| 552 ms \| 424 ms \| 328 ms \| 13 KB \| \| \| \|
	62	+\| commit `810e402` \| 1 612 ms \| 1 463 ms \| 1 336 ms \| 121 KB \| \| \| \|
	63	+
	64	+CLS = 0 everywhere. Server timing on M1M32: `/` 64 ms warm, repo 58 ms,
	65	+`/api/v1/repos` 10 ms. 157 repos, cache 2.0 GB / 9 684 files.
	66	+
	67	+Responsive audit (`document.documentElement.scrollWidth` at 375 px, Chromium +
	68	+WebKit): every page overflows horizontally (399 px in production, 377–383 px
	69	+locally). Causes found by bisection: footer grid `1fr` track inheriting the
	70	+`min-content` of `pre.footer-cmd` (fix: `minmax(0,1fr)` / `min-width:0`), the
	71	+hero `canvas` positioned `inset:-24px` + `width:calc(100%+48px)`, and the
	72	+repo tab strip. Baseline screenshots: `docs/screenshots/baseline/`.
	73	+
	74	+## 4. Critical risks found in Phase 0
	75	+
	76	+1. Memory restart loop (production incident). PM2 restarted `spbgit-server`
	77	+ 2 861 times (`exceeds --max-memory-restart`, RSS up to 2.1 GB vs 750 MB
	78	+ limit). Every restart drops in-flight pushes/clones and makes the post-receive
	79	+ hook POST fail (hook has a 15 s timeout and swallows errors). Request mix
	80	+ before a restart: crawlers on `/<repo>/blob/` and `/raw/` of large files
	81	+ (`phd_thesis` PDFs). `Repos.blob()` buffers whole blobs (up to 64 MB) even
	82	+ when the view only needs size/type, `/raw` buffers again; concurrency is
	83	+ unbounded. Fix in Phase 1 (reliability track): stream `/raw`, metadata-only
	84	+ blob probe, bounded git concurrency, cheaper `/healthz`.
	85	+2. Commit totals inconsistent ("all-time" 3 332 < "52 weeks" 3 346). Root
	86	+ cause verified: `overview-v4.json` is keyed by repo, not by HEAD, and is only
	87	+ invalidated by the hook; 8 repos were pushed while the server was restarting
	88	+ (risk 1) so their cached `commitCount` is stale (e.g. `llm-api` 0 vs 5), while
	89	+ the heatmap is rebuilt from live `rev-list` whenever any push clears
	90	+ `global/`. Fix: validate overview cache against live HEAD (cheap ref stamp),
	91	+ derive both numbers from the same per-repo timestamp source, document metric
	92	+ definitions.
	93	+3. Unbounded logs. pino logs every request at info; `~/.pm2/logs/spbgit-server-out.log`
	94	+ is 599 MB with no rotation. Fix: compact completion-only logging, exclude
	95	+ assets, document `pm2-logrotate`.
	96	+4. Commit page cost. Per-hunk shiki highlighting on every request (1.2–1.5 s
	97	+ TTFB, 121 KB HTML). Fix: cache the prepared diff per sha, collapse large files.
	98	+5. Mobile layout. Horizontal overflow on every page; touch targets < 44 px
	99	+ (tabs 36 px, `.btn-sm` 28 px, copy buttons); desktop-only hover reveal on
	100	+ heading anchors; `.hero-terminal` and constellation canvas run on phones;
	101	+ `100vh` without `dvh`; no safe-area insets; sticky header 64 px on phones.
	102	+6. Themes. Only dark/light; theme toggle is a 2-state button without an
	103	+ "OS" mode; no `color-scheme` meta per theme.
	104	+7. Dead deploy config. `deploy/ecosystem.config.cjs` + `deploy/ngrok.yml`
	105	+ still describe ngrok; CLAUDE.md names host `m3u96a`. Production is M1M32 via
	106	+ `mld` + MacLustr Tunnel. Documentation only — the running manifest is correct.
	107	+8. Fonts. 209 KB of preloaded fonts on first visit (5 files). Keep
	108	+ self-hosting but drop preloads for non-critical weights, subset usage.
	109	+
	110	+## 5. Design direction (decisions)
	111	+
	112	+- Identity kept: S mark, electric-blue→teal gradient, network motif (static
	113	+ SVG/CSS, animated only on desktop without `prefers-reduced-motion`).
	114	+- Three themes: `light` (soft blue-white `#f4f6fb`), `dark` (charcoal/slate
	115	+ `#15181f`), `midnight` (deep navy `#070b16`, electric blue, restrained
	116	+ turquoise — the successor of the v4 obsidian look). Default follows the OS
	117	+ (`auto` → light/dark); explicit override persisted in `localStorage`
	118	+ (`spbgit-theme` = `auto\|light\|dark\|midnight`), applied before first paint by
	119	+ `theme-boot.js`, exposed in the header menu and the ⌘K palette.
	120	+- Semantic tokens in `tokens.css`: surfaces (`--surface-0..3`), foreground
	121	+ (`--fg`, `--fg-muted`, `--fg-faint`), borders, focus ring, status
	122	+ (`--ok/--warn/--danger/--info`), spacing scale 4/8 px (`--space-1..10`),
	123	+ radii, shadows, motion durations, syntax colours (shiki vars). WCAG AA checked
	124	+ per theme (contrast table in progress log).
	125	+- Density: Linear-like. Compact sticky header (56 px desktop, 52 px phone),
	126	+ compact `StatStrip` instead of five hero tiles and six repo tiles, 1-column
	127	+ phone layouts, bottom-sheet dialogs on phones (palette, menu, branch picker).
	128	+- Component library (Nunjucks macros in `src/web/views/components/` +
	129	+ matching CSS sections): AppShell, Header, MobileNavigation (sheet), Breadcrumbs,
	130	+ StatStrip, RepositoryCard, StatusChip, Tabs, SearchDialog, CodeViewer, FileTree,
	131	+ CommitTimeline, DiffViewer, EmptyState, LoadingSkeleton, ErrorState, Toast,
	132	+ ConfirmationDialog (JS, used by destructive CLI-less flows only if they ever
	133	+ appear; shipped as a primitive).
	134	+- Typography: Inter (UI) / JetBrains Mono (code) / Bricolage Grotesque
	135	+ (display, 700 + 800). Instrument Serif italic dropped (one less font).
	136	+ `font-variant-numeric: tabular-nums` on every statistic.
	137	+
	138	+## 6. Phased milestones
	139	+
	140	+\| Phase \| Scope \| Acceptance \|
	141	+\|---\|---\|---\|
	142	+\| 0 Reconnaissance \| this document, baseline numbers, screenshots, risks \| done \|
	143	+\| 1 Design system + reliability P0 \| tokens/themes, AppShell, header + mobile sheet, buttons/tabs/cards/chips, skeleton/empty/error, a11y foundations; streaming raw, blob probe, bounded concurrency, head-validated overview cache, compact logging, overflow test harness \| tests green, no overflow at 320–1920, three themes, memory fix unit-tested \|
	144	+\| 2 Core screens \| home, repo overview, catalog, source browser (tree + blob), clone panel, file tree sidebar on desktop \| all old URLs 200, README/badges unchanged, screenshots at 9 widths \|
	145	+\| 3 Developer workflows \| ⌘K with server-side search (repos/files/commits/branches), commits timeline, diff viewer (unified/split, wrap, cached), branch nav, analytics + metric definitions, keyboard/touch \| search API tests, commit-count coherence test, Playwright mobile smoke \|
	146	+\| 4 Research Mode \| opt-in `research` flag + auto-detection banner, `/:repo/research`: PDF, LaTeX sources, figures, tables, reproducibility checklist, outputs, version links \| no code execution, no LaTeX compile, tests on fixtures \|
	147	+\| 5 AI groundwork \| `src/ai/` provider-agnostic (Anthropic, OpenAI-compatible, local OpenAI-compatible e.g. MLX/llama.cpp), incremental file index, grounded Q&A with `path@sha#Lx-Ly` citations, prompt-injection wrapping, token/concurrency budgets, feature-flagged off by default \| disabled providers are absent, never simulated; tests use an explicit fake provider under `SPBGIT_ENV=test` \|
	148	+\| 6 Agent Workspace \| design document only (isolation, scopes, approvals, audit) \| `docs/AGENT-WORKSPACE-DESIGN.md` \|
	149	+\| 7 Hardening & release \| cross-engine QA (Chromium + WebKit) at 320/360/375/390/430/768/1024/1440/1920, landscape, 200 % zoom, axe audit, perf re-measure, security regression tests, changelog, deploy + rollback runbook \| all acceptance criteria below \|
	150	+
	151	+Deployment to M1M32 (`git pull` + `pm2 restart`) is not performed by the
	152	+implementer without explicit approval (directive: pause before production
	153	+changes).
	154	+
	155	+## 7. Acceptance criteria (from the directive, made checkable)
	156	+
	157	+1. `npm test` includes the Smart HTTP round trip (clone/push/fetch) and passes;
	158	+ every pre-2.0 URL pattern is covered by a route test (home, repo, tree, blob,
	159	+ raw, archive, commits, commit, blame, branches, tags/releases, search, feeds,
	160	+ OG, API).
	161	+2. Playwright run at 320–430 px and desktop, in light/dark/midnight, asserts
	162	+ `scrollWidth === clientWidth` on every core page and 44×44 px targets on
	163	+ primary controls.
	164	+3. Metric definitions documented (`docs/METRICS.md`), unit test proving
	165	+ all-time ≥ 52-week on the same source, no placeholder data in production
	166	+ templates (demo fixtures only under `dev/`).
	167	+4. Search/file browsing: path traversal + ref validation tests; search index
	168	+ built only from repos on disk (all public).
	169	+5. Markdown/diff/code: sanitizer tests (script/iframe/event handlers stripped,
	170	+ badges kept), diff whitespace preserved, keyboard-reachable actions.
	171	+6. Automated tests + a manual Safari/iPhone checklist recorded in the progress
	172	+ log.
	173	+7. AI/Research features behind flags; `/healthz` reports feature flags.
	174	+8. Deliverables: `CHANGELOG.md`, screenshots (`docs/screenshots/`), tests,
	175	+ `docs/BENCHMARKS.md` (before/after), `docs/DEPLOY.md` (deploy + rollback),
	176	+ remaining work list in `docs/SPBGIT-2-PROGRESS.md`.

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	1	+<!--
	2	+ ─────────────────────────────────────────────
	3	+ SPB Git — Personal Git Platform
	4	+ ─────────────────────────────────────────────
	5	+ Author : Simon-Pierre Boucher
	6	+ Contact : contact@spboucher.ai
	7	+ File : docs/SPBGIT-2-PROGRESS.md
	8	+ Purpose : SPB Git 2.0 — per-phase progress log (files, trade-offs, tests, screenshots, open issues)
	9	+ License : MIT © Simon-Pierre Boucher
	10	+ ─────────────────────────────────────────────
	11	+-->
	12	+# SPB Git 2.0 — Progress log
	13	+
	14	+## Phase 0 — Reconnaissance (2026-11-01) ✅
	15	+
	16	+Files added: `docs/SPBGIT-2-PLAN.md`, `docs/SPBGIT-2-PROGRESS.md`,
	17	+`docs/screenshots/baseline/*.png` (home, repo, blob, commits, commit, search ×
	18	+375/1440 × dark/light).
	19	+
	20	+Method: read every source/template/CSS/test file, the deploy manifest on
	21	+M1M32, PM2 state and logs; measured production with Playwright (Chromium) and
	22	+WebKit; ran the existing test suite on a laptop mirror with 9 bare repos cloned
	23	+from production plus a copy of `meta.json`/`activity.jsonl`/`clones.json`
	24	+(`dev/`, git-ignored).
	25	+
	26	+Baseline: tests 59/59, eslint clean, headers clean. Web vitals and server
	27	+timings in the plan (§3). Production restarts: 2 861 (memory). Stale overview
	28	+caches: 8 repos (`countryatlas`, `hilmacorp-ca`, `ka-apify-actors`, `llm-api`,
	29	+`maclustr-agentd`, `wp19_uqo`, `wp20_uqo`, `wp21_uqo`).
	30	+
	31	+Trade-offs: work happens on a laptop mirror (`~/Desktop/Cluster/projets/spbgit`,
	32	+origin = spbgit on M1M32) because the production checkout is the live app; the
	33	+node is updated only by `git pull` + `pm2 restart` after approval.
	34	+
	35	+Open issues carried into Phase 1: risks 1–8 of the plan.
	36	+
	37	+## Phase 1 — Design system + reliability P0 (2026-11-01) ✅
	38	+
	39	+Files changed: `src/web/assets/css/tokens.css` (rewritten: semantic tokens,
	40	+three themes, type/spacing/motion scales), `src/web/assets/css/app.css`
	41	+(rewritten, mobile-first, 13 sections), `src/web/assets/js/theme-boot.js`
	42	+(auto/light/dark/midnight before first paint), `src/web/assets/js/app.js`
	43	+(rewritten: dialogs/sheets, theme, palette, toast, confirm, clipboard, file
	44	+tree, code/diff helpers, TOC), `src/web/views/layout.njk` (AppShell),
	45	+`src/web/views/components/ui.njk` (new: icon, chip, statStrip, tabs,
	46	+breadcrumbs, refSelect, emptyState, errorState, skeleton, copyButton),
	47	+`src/lib/semaphore.mjs` (new), `src/git/repo.mjs` (git semaphore, `blobInfo`,
	48	+`blobStream`, `blob({maxBytes})`, `refStamp`, `allPaths`, `grepCommits`),
	49	+`src/lib/overview.mjs` (stamp-validated cache `overview-v5.json`, clones read
	50	+once, research detection), `src/stats/activity.mjs` (stamp-validated calendar
	51	+with `allTime`), `src/server.mjs` (compact completion-only logging via
	52	+`LogController`, memoized `/healthz` with memory/git/feature fields),
	53	+`src/config.mjs` (AI flags, off by default).
	54	+
	55	+Trade-offs: `Instrument Serif` dropped (one font less, 1 preload less);
	56	+the constellation canvas and typewriter are gone (static terminal card on
	57	+desktop only) — decorative motion is now limited to a slow mesh drift on
	58	+≥768 px without `prefers-reduced-motion`. `git` subprocesses are capped at 12
	59	+concurrent (`SPBGIT_GIT_CONCURRENCY`); crawlers now queue instead of growing
	60	+RSS. Native `<dialog>` is used for the palette, menu, clone panel and file
	61	+tree (bottom sheets on phones, modals on desktop) — requires Safari ≥ 15.4.
	62	+
	63	+Tests: `test/unit/semaphore.test.mjs` (2), `test/unit/routes-helpers.test.mjs`
	64	+(8: split rows, day grouping, research signals, sparkline, query terms,
	65	+stamps), e2e extended (+6: scoped search API, tree API + traversal, 3 MB
	66	+binary streamed from `/raw` with exact bytes + metadata-only blob view,
	67	+missed-hook detection with coherent totals, split/history/blame, healthz
	68	+flags). 74/74 green, eslint + headers clean.
	69	+
	70	+## Phase 2 — Core screens (2026-11-01) ✅
	71	+
	72	+Files changed: `src/web/views/{home,repo,tree,blob,commits,commit,blame,branches,tags,search,error}.njk`
	73	+(all rewritten on the component library), `partials/{repo-header,repo-card,file-table}.njk`
	74	+(rewritten), `partials/{clone-panel,tree-sheet}.njk` (new), `views/metrics.njk`
	75	+(new `/about/metrics`), `src/web/routes.mjs` (rewritten: streamed `/raw`,
	76	+metadata-only blob probe, cached highlighted blobs/markdown/blame, cached
	77	+prepared diff per sha `commit-v2.json`, split view, large diffs not loaded
	78	+by default, `/about/metrics`, scoped search page), `src/api/v1.mjs`
	79	+(`/api/v1/search`, `/api/v1/repos/:name/tree`, richer `/api/v1/stats`,
	80	+`research` flag on PATCH), `src/lib/search.mjs` (rewritten: files, refs,
	81	+commits, stamp-validated index `search-index-v2.json`).
	82	+
	83	+Responsive QA (`scripts/qa/screens.py`, Playwright Chromium, 13 pages ×
	84	+320/360/375/390/430/768/1024/1440/1920, light/dark/midnight): **0 horizontal
	85	+overflow, 0 essential control under 44×44 px on touch viewports** (was: every
	86	+page overflowing at 375 px). Screenshots: `docs/screenshots/v2/` (375 + 1440,
	87	+midnight + light; full run archived outside the repo).
	88	+
	89	+Open issues carried: commit pages ship every file's rows in one document
	90	+(3 MB uncompressed for the 60-file v4 commit; ~120 KB over the gzip edge) —
	91	+per-file lazy loading is listed as remaining work; WebKit run and 200 % zoom
	92	+are done in Phase 7.

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	753	+ "small": []
	754	+ },
	755	+ {
	756	+ "engine": "chromium",
	757	+ "theme": "light",
	758	+ "width": 375,
	759	+ "page": "404",
	760	+ "scrollWidth": 375,
	761	+ "clientWidth": 375,
	762	+ "small": []
	763	+ },
	764	+ {
	765	+ "engine": "chromium",
	766	+ "theme": "light",
	767	+ "width": 430,
	768	+ "page": "home",
	769	+ "scrollWidth": 430,
	770	+ "clientWidth": 430,
	771	+ "small": [
	772	+ "input#repo-filter.input 398x38"
	773	+ ]
	774	+ },
	775	+ {
	776	+ "engine": "chromium",
	777	+ "theme": "light",
	778	+ "width": 430,
	779	+ "page": "repo",
	780	+ "scrollWidth": 430,
	781	+ "clientWidth": 430,
	782	+ "small": []
	783	+ },
	784	+ {
	785	+ "engine": "chromium",
	786	+ "theme": "light",
	787	+ "width": 430,
	788	+ "page": "tree",
	789	+ "scrollWidth": 430,
	790	+ "clientWidth": 430,
	791	+ "small": []
	792	+ },
	793	+ {
	794	+ "engine": "chromium",
	795	+ "theme": "light",
	796	+ "width": 430,
	797	+ "page": "blob",
	798	+ "scrollWidth": 430,
	799	+ "clientWidth": 430,
	800	+ "small": []
	801	+ },
	802	+ {
	803	+ "engine": "chromium",
	804	+ "theme": "light",
	805	+ "width": 430,
	806	+ "page": "readme",
	807	+ "scrollWidth": 430,
	808	+ "clientWidth": 430,
	809	+ "small": []
	810	+ },
	811	+ {
	812	+ "engine": "chromium",
	813	+ "theme": "light",
	814	+ "width": 430,
	815	+ "page": "commits",
	816	+ "scrollWidth": 430,
	817	+ "clientWidth": 430,
	818	+ "small": []
	819	+ },
	820	+ {
	821	+ "engine": "chromium",
	822	+ "theme": "light",
	823	+ "width": 430,
	824	+ "page": "commit",
	825	+ "scrollWidth": 430,
	826	+ "clientWidth": 430,
	827	+ "small": []
	828	+ },
	829	+ {
	830	+ "engine": "chromium",
	831	+ "theme": "light",
	832	+ "width": 430,
	833	+ "page": "blame",
	834	+ "scrollWidth": 430,
	835	+ "clientWidth": 430,
	836	+ "small": []
	837	+ },
	838	+ {
	839	+ "engine": "chromium",
	840	+ "theme": "light",
	841	+ "width": 430,
	842	+ "page": "branches",
	843	+ "scrollWidth": 430,
	844	+ "clientWidth": 430,
	845	+ "small": []
	846	+ },
	847	+ {
	848	+ "engine": "chromium",
	849	+ "theme": "light",
	850	+ "width": 430,
	851	+ "page": "tags",
	852	+ "scrollWidth": 430,
	853	+ "clientWidth": 430,
	854	+ "small": []
	855	+ },
	856	+ {
	857	+ "engine": "chromium",
	858	+ "theme": "light",
	859	+ "width": 430,
	860	+ "page": "search",
	861	+ "scrollWidth": 430,
	862	+ "clientWidth": 430,
	863	+ "small": []
	864	+ },
	865	+ {
	866	+ "engine": "chromium",
	867	+ "theme": "light",
	868	+ "width": 430,
	869	+ "page": "metrics",
	870	+ "scrollWidth": 430,
	871	+ "clientWidth": 430,
	872	+ "small": []
	873	+ },
	874	+ {
	875	+ "engine": "chromium",
	876	+ "theme": "light",
	877	+ "width": 430,
	878	+ "page": "404",
	879	+ "scrollWidth": 430,
	880	+ "clientWidth": 430,
	881	+ "small": []
	882	+ },
	883	+ {
	884	+ "engine": "chromium",
	885	+ "theme": "light",
	886	+ "width": 1440,
	887	+ "page": "home",
	888	+ "scrollWidth": 1440,
	889	+ "clientWidth": 1440,
	890	+ "small": []
	891	+ },
	892	+ {
	893	+ "engine": "chromium",
	894	+ "theme": "light",
	895	+ "width": 1440,
	896	+ "page": "repo",
	897	+ "scrollWidth": 1440,
	898	+ "clientWidth": 1440,
	899	+ "small": []
	900	+ },
	901	+ {
	902	+ "engine": "chromium",
	903	+ "theme": "light",
	904	+ "width": 1440,
	905	+ "page": "tree",
	906	+ "scrollWidth": 1440,
	907	+ "clientWidth": 1440,
	908	+ "small": []
	909	+ },
	910	+ {
	911	+ "engine": "chromium",
	912	+ "theme": "light",
	913	+ "width": 1440,
	914	+ "page": "blob",
	915	+ "scrollWidth": 1440,
	916	+ "clientWidth": 1440,
	917	+ "small": []
	918	+ },
	919	+ {
	920	+ "engine": "chromium",
	921	+ "theme": "light",
	922	+ "width": 1440,
	923	+ "page": "readme",
	924	+ "scrollWidth": 1440,
	925	+ "clientWidth": 1440,
	926	+ "small": []
	927	+ },
	928	+ {
	929	+ "engine": "chromium",
	930	+ "theme": "light",
	931	+ "width": 1440,
	932	+ "page": "commits",
	933	+ "scrollWidth": 1440,
	934	+ "clientWidth": 1440,
	935	+ "small": []
	936	+ },
	937	+ {
	938	+ "engine": "chromium",
	939	+ "theme": "light",
	940	+ "width": 1440,
	941	+ "page": "commit",
	942	+ "scrollWidth": 1440,
	943	+ "clientWidth": 1440,
	944	+ "small": []
	945	+ },
	946	+ {
	947	+ "engine": "chromium",
	948	+ "theme": "light",
	949	+ "width": 1440,
	950	+ "page": "blame",
	951	+ "scrollWidth": 1440,
	952	+ "clientWidth": 1440,
	953	+ "small": []
	954	+ },
	955	+ {
	956	+ "engine": "chromium",
	957	+ "theme": "light",
	958	+ "width": 1440,
	959	+ "page": "branches",
	960	+ "scrollWidth": 1440,
	961	+ "clientWidth": 1440,
	962	+ "small": []
	963	+ },
	964	+ {
	965	+ "engine": "chromium",
	966	+ "theme": "light",
	967	+ "width": 1440,
	968	+ "page": "tags",
	969	+ "scrollWidth": 1440,
	970	+ "clientWidth": 1440,
	971	+ "small": []
	972	+ },
	973	+ {
	974	+ "engine": "chromium",
	975	+ "theme": "light",
	976	+ "width": 1440,
	977	+ "page": "search",
	978	+ "scrollWidth": 1440,
	979	+ "clientWidth": 1440,
	980	+ "small": []
	981	+ },
	982	+ {
	983	+ "engine": "chromium",
	984	+ "theme": "light",
	985	+ "width": 1440,
	986	+ "page": "metrics",
	987	+ "scrollWidth": 1440,
	988	+ "clientWidth": 1440,
	989	+ "small": []
	990	+ },
	991	+ {
	992	+ "engine": "chromium",
	993	+ "theme": "light",
	994	+ "width": 1440,
	995	+ "page": "404",
	996	+ "scrollWidth": 1440,
	997	+ "clientWidth": 1440,
	998	+ "small": []
	999	+ }
	1000	+]
		\ No newline at end of file

added docs/screenshots/v2/search-1440-light-chromium.png +0 −0

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added docs/screenshots/v2/search-1440-midnight-chromium.png +0 −0

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added docs/screenshots/v2/search-375-light-chromium.png +0 −0

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added docs/screenshots/v2/search-375-midnight-chromium.png +0 −0

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modified package.json +1 −1

		`@@ -1,6 +1,6 @@`
1	1	{
2	2	"name": "spbgit",
3		− "version": "1.1.0",
	3	+ "version": "2.0.0",
4	4	"description": "SPB Git — Personal Git Platform for Simon-Pierre Boucher",
5	5	"author": "Simon-Pierre Boucher <contact@spboucher.ai>",
6	6	"license": "MIT",

added scripts/qa/screens.py +96 −0

		`@@ -0,0 +1,96 @@`
	1	+# ─────────────────────────────────────────────
	2	+# SPB Git — Personal Git Platform
	3	+# ─────────────────────────────────────────────
	4	+# Author : Simon-Pierre Boucher
	5	+# Contact : contact@spboucher.ai
	6	+# File : scripts/qa/screens.py
	7	+# Purpose : Responsive QA — screenshots + overflow + touch-target checks across widths, themes and engines (Playwright for Python)
	8	+# License : MIT © Simon-Pierre Boucher
	9	+# ─────────────────────────────────────────────
	10	+"""
	11	+Usage:
	12	+ python3 -I scripts/qa/screens.py BASE_URL OUT_DIR [--widths 320,375,1440] [--themes light,dark,midnight]
	13	+ [--engines chromium,webkit] [--pages home,repo,...] [--repo spbgit] [--no-shots]
	14	+Exit code 1 when any page overflows horizontally or an essential control is under 44×44 CSS px on a touch viewport.
	15	+"""
	16	+import sys, os, asyncio, argparse, json
	17	+from playwright.async_api import async_playwright
	18	+
	19	+PAGES = {
	20	+ "home": "/",
	21	+ "repo": "/{repo}",
	22	+ "tree": "/{repo}/tree/main/src",
	23	+ "blob": "/{repo}/blob/main/src/server.mjs",
	24	+ "readme": "/{repo}/blob/main/README.md",
	25	+ "commits": "/{repo}/commits/main",
	26	+ "commit": "/{repo}/commit/{sha}",
	27	+ "blame": "/{repo}/blame/main/package.json",
	28	+ "branches": "/{repo}/branches",
	29	+ "tags": "/{repo}/tags",
	30	+ "search": "/search?q=git",
	31	+ "metrics": "/about/metrics",
	32	+ "404": "/this-does-not-exist",
	33	+}
	34	+ESSENTIAL = ".app-header button, .app-header a.brand, .tab, .btn:not(.hide-mobile *), .icon-btn, .sha-chip, .ref-select, #repo-filter, .catalog-filters select, .sheet-nav a, .theme-choices button"
	35	+CHECK_JS = """(sel) => {
	36	+ const de = document.documentElement;
	37	+ const out = { scrollWidth: de.scrollWidth, clientWidth: de.clientWidth, small: [] };
	38	+ for (const el of document.querySelectorAll(sel)) {
	39	+ const r = el.getBoundingClientRect();
	40	+ if (r.width === 0 \|\| r.height === 0) continue; // hidden
	41	+ if (el.closest('dialog:not([open])')) continue;
	42	+ if (r.height < 43.5 \|\| r.width < 43.5) out.small.push(el.tagName.toLowerCase() + (el.id ? '#' + el.id : '') + (el.className && typeof el.className === 'string' ? '.' + el.className.trim().split(/\\s+/).slice(0, 2).join('.') : '') + ' ' + Math.round(r.width) + 'x' + Math.round(r.height));
	43	+ }
	44	+ return out;
	45	+}"""
	46	+
	47	+async def main():
	48	+ ap = argparse.ArgumentParser()
	49	+ ap.add_argument("base"); ap.add_argument("out")
	50	+ ap.add_argument("--widths", default="320,360,375,390,430,768,1024,1440,1920")
	51	+ ap.add_argument("--themes", default="light,dark,midnight")
	52	+ ap.add_argument("--engines", default="chromium")
	53	+ ap.add_argument("--pages", default=",".join(PAGES))
	54	+ ap.add_argument("--repo", default="spbgit"); ap.add_argument("--sha", default="810e402")
	55	+ ap.add_argument("--no-shots", action="store_true"); ap.add_argument("--zoom", type=float, default=1.0)
	56	+ a = ap.parse_args()
	57	+ os.makedirs(a.out, exist_ok=True)
	58	+ widths = [int(w) for w in a.widths.split(",")]
	59	+ themes = a.themes.split(","); engines = a.engines.split(",")
	60	+ pages = [(k, PAGES[k].format(repo=a.repo, sha=a.sha)) for k in a.pages.split(",") if k in PAGES]
	61	+ failures = 0; rows = []
	62	+ async with async_playwright() as p:
	63	+ for engine in engines:
	64	+ b = await getattr(p, engine).launch()
	65	+ for theme in themes:
	66	+ for w in widths:
	67	+ mobile = w < 600
	68	+ h = 812 if mobile else 900
	69	+ ctx = await b.new_context(viewport={"width": w, "height": h}, is_mobile=mobile and engine == "chromium", has_touch=mobile, device_scale_factor=1)
	70	+ await ctx.add_init_script(f"try{{localStorage.setItem('spbgit-theme','{theme}')}}catch(e){{}}")
	71	+ if a.zoom != 1.0:
	72	+ await ctx.add_init_script(f"document.addEventListener('DOMContentLoaded',()=>{{document.documentElement.style.zoom='{a.zoom}'}})")
	73	+ pg = await ctx.new_page()
	74	+ for name, path in pages:
	75	+ try:
	76	+ await pg.goto(a.base + path, wait_until="networkidle", timeout=45000)
	77	+ await pg.wait_for_timeout(300)
	78	+ r = await pg.evaluate(CHECK_JS, ESSENTIAL)
	79	+ overflow = r["scrollWidth"] > r["clientWidth"]
	80	+ small = r["small"] if mobile else []
	81	+ bad = overflow or bool(small)
	82	+ failures += int(bad)
	83	+ rows.append({"engine": engine, "theme": theme, "width": w, "page": name, "scrollWidth": r["scrollWidth"], "clientWidth": r["clientWidth"], "small": small})
	84	+ flag = ("OVERFLOW " if overflow else "") + (f"SMALL:{small[:3]}" if small else "")
	85	+ print(f"{engine:8} {theme:8} {w:5} {name:9} sw={r['scrollWidth']:5} cw={r['clientWidth']:5} {flag}")
	86	+ if not a.no_shots and w in (320, 375, 430, 1440):
	87	+ await pg.screenshot(path=f"{a.out}/{name}-{w}-{theme}-{engine}.png", full_page=True)
	88	+ except Exception as e:
	89	+ failures += 1; print(f"{engine} {theme} {w} {name} ERROR {str(e)[:120]}")
	90	+ await ctx.close()
	91	+ await b.close()
	92	+ with open(f"{a.out}/report.json", "w") as f: json.dump(rows, f, indent=1)
	93	+ print(f"\n{'FAIL' if failures else 'OK'} — {failures} failing page/width combinations")
	94	+ sys.exit(1 if failures else 0)
	95	+
	96	+asyncio.run(main())

modified src/api/v1.mjs +41 −2

		`@@ -11,10 +11,12 @@`
11	11	*/
12	12
13	13	import { z } from 'zod';
14		−import { isValidRepoName } from '../lib/util.mjs';
	14	+import { isValidRepoName, isValidTreePath } from '../lib/util.mjs';
15	15	import { makeRequireAuth } from '../auth/token.mjs';
16	16	import { installHooks } from '../git/hooks.mjs';
17	17	import { repoOverview, allOverviews, siteStats } from '../lib/overview.mjs';
	18	+import { search } from '../lib/search.mjs';
	19	+import { contributionCalendar } from '../stats/activity.mjs';
18	20	import { computeLanguages } from '../stats/languages.mjs';
19	21	import { isValidAssetName, isValidTagName } from '../git/releases.mjs';
20	22
		`@@ -36,6 +38,7 @@ const patchSchema = z.object({`
36	38	topics: z.array(z.string().regex(TOPIC_RE)).max(10).optional(),
37	39	homepage: z.union([z.literal(''), z.string().url().max(300)]).optional(),
38	40	pinned: z.boolean().optional(),
	41	+ research: z.boolean().optional(),
39	42	defaultBranch: z.string().regex(/^[\w./-]{1,100}$/).optional(),
40	43	}).strict();
41	44
		`@@ -97,7 +100,43 @@ export function registerApi(app, ctx) {`
97	100	return { ref: refInput, sha, page, hasNext, commits };
98	101	});
99	102
100		− app.get('/api/v1/stats', async () => siteStats(ctx));
	103	+ app.get('/api/v1/stats', async () => {
	104	+ const overviews = await allOverviews(ctx);
	105	+ const [stats, calendar] = await Promise.all([siteStats(ctx, overviews), contributionCalendar(ctx)]);
	106	+ return {
	107	+ ...stats,
	108	+ commitsLast52Weeks: calendar.total,
	109	+ streak: calendar.streak,
	110	+ longestStreak: calendar.longest,
	111	+ activeDays: calendar.activeDays,
	112	+ definitions: `${ctx.config.publicUrl}/about/metrics`,
	113	+ };
	114	+ });
	115	+
	116	+ // Scoped search powering the ⌘K palette and /search.
	117	+ app.get('/api/v1/search', async (request) => {
	118	+ const q = String(request.query.q ?? '').slice(0, 120);
	119	+ const scope = ['all', 'repos', 'files', 'commits', 'branches', 'readmes'].includes(request.query.scope) ? request.query.scope : 'all';
	120	+ const repo = typeof request.query.repo === 'string' && isValidRepoName(request.query.repo) && ctx.repos.exists(request.query.repo) ? request.query.repo : null;
	121	+ const limit = Math.max(1, Math.min(50, Number(request.query.limit) \|\| 20));
	122	+ const results = await search(ctx, q, { scope, repo, limit });
	123	+ return { q, scope, repo, ...results };
	124	+ });
	125	+
	126	+ // One directory level of a tree (feeds the lazy file tree).
	127	+ app.get('/api/v1/repos/:name/tree', async (request, reply) => {
	128	+ const { name } = request.params;
	129	+ if (!isValidRepoName(name) \|\| !ctx.repos.exists(name)) return apiError(reply, 404, 'not_found', 'repository not found');
	130	+ const refInput = String(request.query.ref ?? '') \|\| (await ctx.repos.defaultBranch(name));
	131	+ const path = String(request.query.path ?? '').replace(/^\/+\|\/+$/g, '');
	132	+ if (path !== '' && !isValidTreePath(path)) return apiError(reply, 400, 'invalid_path', 'invalid path');
	133	+ const sha = await ctx.repos.resolveRef(name, refInput);
	134	+ if (!sha) return apiError(reply, 404, 'ref_not_found', `unknown ref: ${refInput}`);
	135	+ const entries = await ctx.repos.tree(name, sha, path);
	136	+ if (!entries) return apiError(reply, 404, 'not_found', 'no such directory');
	137	+ reply.header('Cache-Control', /^[0-9a-f]{40}$/.test(refInput) ? 'public, max-age=31536000, immutable' : 'public, max-age=60');
	138	+ return { repo: name, ref: refInput, sha, path, entries: entries.map((e) => ({ name: e.name, path: e.path, type: e.type, size: e.size })) };
	139	+ });
101	140
102	141	app.post('/api/v1/repos', async (request, reply) => {
103	142	if (!(await requireAuth(request, reply))) return reply;

modified src/config.mjs +19 −0

		`@@ -36,6 +36,14 @@ const schema = z.object({`
36	36	SPBGIT_CACHE_DIR: z.string().min(1).default('/srv/spbgit/cache'),
37	37	SPBGIT_LOG_LEVEL: z.enum(['trace', 'debug', 'info', 'warn', 'error', 'fatal']).default('info'),
38	38	SPBGIT_ENV: z.enum(['development', 'production', 'test']).default('production'),
	39	+ // ── AI features (Phase 5) — OFF unless a provider is configured explicitly ──
	40	+ SPBGIT_AI_PROVIDER: z.enum(['', 'anthropic', 'openai-compatible', 'fake']).default(''),
	41	+ SPBGIT_AI_API_KEY: z.string().default(''),
	42	+ SPBGIT_AI_BASE_URL: z.string().default(''),
	43	+ SPBGIT_AI_MODEL: z.string().default(''),
	44	+ SPBGIT_AI_MAX_TOKENS: z.coerce.number().int().min(256).max(32000).default(2048),
	45	+ SPBGIT_AI_CONCURRENCY: z.coerce.number().int().min(1).max(16).default(2),
	46	+ SPBGIT_AI_DAILY_BUDGET_TOKENS: z.coerce.number().int().min(0).default(500000),
39	47	});
40	48
41	49	/**
		`@@ -94,6 +102,17 @@ export function loadConfig(overrides = {}) {`
94	102	dataDir: abs(env.SPBGIT_DATA_DIR),
95	103	cacheDir: abs(env.SPBGIT_CACHE_DIR),
96	104	owner: OWNER,
	105	+ ai: Object.freeze({
	106	+ // The fake provider is only ever allowed under the test environment.
	107	+ enabled: env.SPBGIT_AI_PROVIDER !== '' && (env.SPBGIT_AI_PROVIDER !== 'fake' \|\| env.SPBGIT_ENV === 'test'),
	108	+ provider: env.SPBGIT_AI_PROVIDER \|\| null,
	109	+ apiKey: env.SPBGIT_AI_API_KEY,
	110	+ baseUrl: env.SPBGIT_AI_BASE_URL,
	111	+ model: env.SPBGIT_AI_MODEL,
	112	+ maxTokens: env.SPBGIT_AI_MAX_TOKENS,
	113	+ concurrency: env.SPBGIT_AI_CONCURRENCY,
	114	+ dailyBudgetTokens: env.SPBGIT_AI_DAILY_BUDGET_TOKENS,
	115	+ }),
97	116	});
98	117	return config;
99	118	}

modified src/git/repo.mjs +158 −11

		`@@ -15,8 +15,9 @@ import { promisify } from 'node:util';`
15	15	import { readdirSync, existsSync, statSync, renameSync, mkdirSync } from 'node:fs';
16	16	import { join } from 'node:path';
17	17	import { isValidRepoName, safeJoin, isValidTreePath } from '../lib/util.mjs';
	18	+import { Semaphore } from '../lib/semaphore.mjs';
18	19
19		−const execFileAsync = promisify(execFile);
	20	+const execFileRaw = promisify(execFile);
20	21	const MAX_BUFFER = 64 * 1024 * 1024;
21	22	const FS = '\x01';
22	23	const RS = '\x02';
		`@@ -25,6 +26,21 @@ const RS = '\x02';`
25	26	const DIFF_MAX_LINES = 20000;
26	27	/** Commits walked when computing "last commit per path" before falling back. */
27	28	const TREE_LOG_WALK_CAP = 600;
	29	+/** Bytes read to decide whether a blob is binary. */
	30	+const BINARY_PROBE_BYTES = 8000;
	31	+/**
	32	+ * Global ceiling on concurrent git subprocesses. Crawlers fanning out over
	33	+ * large blobs used to spawn dozens of 64 MB-buffered git processes at once
	34	+ * (the 2026-10/11 memory-restart loop); 12 keeps a 10-core gateway busy
	35	+ * without letting RSS run away.
	36	+ */
	37	+export const GIT_CONCURRENCY = Number(process.env.SPBGIT_GIT_CONCURRENCY) > 0 ? Number(process.env.SPBGIT_GIT_CONCURRENCY) : 12;
	38	+export const gitSemaphore = new Semaphore(GIT_CONCURRENCY);
	39	+
	40	+/** execFile under the global git semaphore. */
	41	+function execFileAsync(cmd, args, opts) {
	42	+ return gitSemaphore.run(() => execFileRaw(cmd, args, opts));
	43	+}
28	44
29	45	/**
30	46	* Repository model rooted at `gitRoot`. All read operations shell out to the
		`@@ -272,20 +288,115 @@ export class Repos {`
272	288
273	289	/**
274	290	* Read a blob at `<sha>:<path>`.
275		− * @returns {Promise<{content: Buffer, size: number, binary: boolean}\|null>}
	291	+ * @param {{maxBytes?: number}} [opts] when the blob is larger than `maxBytes`
	292	+ * the content is NOT read — `content` is null and `tooLarge` is true.
	293	+ * @returns {Promise<{content: Buffer\|null, size: number, binary: boolean, tooLarge: boolean}\|null>}
276	294	*/
277		− async blob(name, sha, path) {
	295	+ async blob(name, sha, path, opts = {}) {
278	296	if (!isValidTreePath(path)) return null;
	297	+ const info = await this.blobInfo(name, sha, path);
	298	+ if (!info) return null;
	299	+ if (opts.maxBytes != null && info.size > opts.maxBytes) {
	300	+ return { content: null, size: info.size, binary: info.binary, tooLarge: true };
	301	+ }
279	302	try {
280	303	const content = await this.gitBuffer(name, ['cat-file', 'blob', `${sha}:${path}`]);
281		− const probe = content.subarray(0, 8000);
282		− const binary = probe.includes(0);
283		− return { content, size: content.length, binary };
	304	+ return { content, size: content.length, binary: info.binary, tooLarge: false };
284	305	} catch {
285	306	return null;
286	307	}
287	308	}
288	309
	310	+ /**
	311	+ * Size + binary flag of a blob WITHOUT buffering it: `cat-file -s` plus a
	312	+ * bounded read of the first bytes. Lets views and `/raw` decide what to do
	313	+ * with multi-megabyte files at near-zero memory cost.
	314	+ * @returns {Promise<{size: number, binary: boolean}\|null>}
	315	+ */
	316	+ async blobInfo(name, sha, path) {
	317	+ if (!isValidTreePath(path)) return null;
	318	+ const type = await this.tryGit(name, ['cat-file', '-t', `${sha}:${path}`]);
	319	+ if (!type \|\| type.trim() !== 'blob') return null;
	320	+ const sizeOut = await this.tryGit(name, ['cat-file', '-s', `${sha}:${path}`]);
	321	+ const size = Number(sizeOut?.trim());
	322	+ if (!Number.isFinite(size)) return null;
	323	+ if (size === 0) return { size: 0, binary: false };
	324	+ const head = await this.#readHead(name, ['cat-file', 'blob', `${sha}:${path}`], BINARY_PROBE_BYTES);
	325	+ return { size, binary: head.includes(0) };
	326	+ }
	327	+
	328	+ /** Spawn git and collect at most `limit` bytes of stdout, then kill it. */
	329	+ #readHead(name, args, limit) {
	330	+ return gitSemaphore.run(() => new Promise((resolve) => {
	331	+ const child = spawn('git', args, { cwd: this.dir(name) });
	332	+ const chunks = [];
	333	+ let got = 0;
	334	+ let done = false;
	335	+ const finish = () => {
	336	+ if (done) return;
	337	+ done = true;
	338	+ resolve(Buffer.concat(chunks).subarray(0, limit));
	339	+ };
	340	+ child.stdout.on('data', (chunk) => {
	341	+ if (done) return;
	342	+ chunks.push(chunk);
	343	+ got += chunk.length;
	344	+ if (got >= limit) {
	345	+ child.stdout.destroy();
	346	+ child.kill('SIGTERM');
	347	+ finish();
	348	+ }
	349	+ });
	350	+ child.on('close', finish);
	351	+ child.on('error', finish);
	352	+ }));
	353	+ }
	354	+
	355	+ /**
	356	+ * Stream a blob's content (for `/raw`). The returned stream is git's stdout;
	357	+ * the semaphore slot is released when the process exits.
	358	+ * @returns {Promise<import('node:stream').Readable>}
	359	+ */
	360	+ async blobStream(name, sha, path) {
	361	+ if (!isValidTreePath(path)) throw new Error('invalid path');
	362	+ const release = await gitSemaphore.acquire();
	363	+ const child = spawn('git', ['cat-file', 'blob', `${sha}:${path}`], { cwd: this.dir(name) });
	364	+ let released = false;
	365	+ const done = () => {
	366	+ if (!released) {
	367	+ released = true;
	368	+ release();
	369	+ }
	370	+ };
	371	+ child.on('close', done);
	372	+ child.on('error', done);
	373	+ child.stdout.on('close', () => {
	374	+ if (child.exitCode === null) child.kill('SIGTERM');
	375	+ });
	376	+ return child.stdout;
	377	+ }
	378	+
	379	+ /**
	380	+ * Cheap change detector for a repository's refs: mtimes of HEAD,
	381	+ * packed-refs and the refs/heads + refs/tags directories. Any push, tag or
	382	+ * branch deletion changes at least one of them, so caches keyed on this
	383	+ * stamp never go stale when the post-receive hook is missed.
	384	+ * @returns {string}
	385	+ */
	386	+ refStamp(name) {
	387	+ const dir = this.dir(name);
	388	+ const parts = [];
	389	+ for (const rel of ['HEAD', 'packed-refs', 'refs/heads', 'refs/tags']) {
	390	+ try {
	391	+ const st = statSync(join(dir, rel));
	392	+ parts.push(`${rel}:${st.mtimeMs}:${st.size}`);
	393	+ } catch {
	394	+ parts.push(`${rel}:-`);
	395	+ }
	396	+ }
	397	+ return parts.join('\|');
	398	+ }
	399	+
289	400	/** Type of the object at `<sha>:<path>` — 'blob' \| 'tree' \| null. */
290	401	async objectType(name, sha, path) {
291	402	if (path === '') return 'tree';
		`@@ -635,14 +746,50 @@ export class Repos {`
635	746	.filter(Boolean);
636	747	}
637	748
638		− /** All commit timestamps+subjects on the default branch (for the heatmap). */
639		− async commitTimestamps(name) {
640		− const head = await this.head(name);
641		− if (!head) return [];
642		− const out = await this.tryGit(name, ['rev-list', '--format=%ct', '--no-commit-header', head]);
	749	+ /**
	750	+ * Committer timestamps (unix seconds) of every commit reachable from HEAD —
	751	+ * the single source for commit counts, sparklines and the calendar (see
	752	+ * /about/metrics).
	753	+ * @param {string} name
	754	+ * @param {string} [head] resolved HEAD sha (looked up when omitted)
	755	+ */
	756	+ async commitTimestamps(name, head) {
	757	+ const sha = head ?? (await this.head(name));
	758	+ if (!sha) return [];
	759	+ const out = await this.tryGit(name, ['rev-list', '--format=%ct', '--no-commit-header', sha]);
643	760	if (!out) return [];
644	761	return out.split('\n').filter(Boolean).map(Number);
645	762	}
	763	+
	764	+ /**
	765	+ * Every path at a commit (for the file search index). Capped so one huge
	766	+ * monorepo cannot dominate the index.
	767	+ * @returns {Promise<string[]>}
	768	+ */
	769	+ async allPaths(name, sha, cap = 20000) {
	770	+ const out = await this.tryGit(name, ['ls-tree', '-r', '--name-only', '-z', sha]);
	771	+ if (!out) return [];
	772	+ const paths = out.split('\0').filter(Boolean);
	773	+ return paths.length > cap ? paths.slice(0, cap) : paths;
	774	+ }
	775	+
	776	+ /**
	777	+ * Commits whose message matches `query` (case-insensitive, fixed string).
	778	+ * @returns {Promise<Array<{sha: string, shortSha: string, subject: string, authorName: string, date: string}>>}
	779	+ */
	780	+ async grepCommits(name, sha, query, limit = 10) {
	781	+ const q = String(query ?? '').trim();
	782	+ if (!q \|\| q.startsWith('-')) return [];
	783	+ const out = await this.tryGit(name, [
	784	+ 'log', `--max-count=${limit}`, '-i', '--fixed-strings', `--grep=${q}`,
	785	+ `--format=%H${FS}%h${FS}%s${FS}%an${FS}%cI`, sha,
	786	+ ]);
	787	+ if (!out) return [];
	788	+ return out.split('\n').filter(Boolean).map((line) => {
	789	+ const [full, short, subject, authorName, date] = line.split(FS);
	790	+ return { sha: full, shortSha: short, subject, authorName, date };
	791	+ });
	792	+ }
646	793	}
647	794
648	795	/**

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