spb/metrika Public

- root cause: duckdb-swift's element(forColumn:at:) linearly rescans
  every chunk on every element access — O(rows x chunks); a 10M-row CSV
  load took 276 s
- DuckDBFastReader: pointer-based duckdb C calls via @_silgen_name (the
  C library is statically linked; only pointer-argument functions are
  declared, so no struct-ABI exposure), private in-memory instance,
  contiguous column_data/nullmask_data extraction
- ZQDataStore.dataFrame(fromQuery:): LIMIT-0 schema probe through the
  supported API, SQL-side casts to DOUBLE/VARCHAR, memcpy per numeric
  column; dead per-element materializer removed
- measured (M4-class): 10M-row parquet 0.20 s, csv 0.31 s, summarize
  ~0.27 s, robust reg ~0.24 s — CLAUDE.md §8 budgets met; table updated
  with measured numbers
- 116 tests green (identical numerics through the new path)
- version 1.0.1

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

- sysuse command with bundled samples (sales: 200-firm x 5-year panel;
  mtcars) shipped as ZQEngine resources, generated by
  scripts/make_samples.R
- metrika-cli docs: static documentation site rendered from the shared
  command registry (docs/index.html, 38 commands, light/dark); CLI
  restructured with a default 'run' subcommand
- Metal point-sprite renderer (CLAUDE.md §7 pane 4): packed 12-byte
  vertices, unified-memory buffer written once, scroll-pan /
  pinch-zoom / double-click-reset touching only a 24-byte uniform;
  takes over scatter plots past 100k points (METRIKA_METAL_THRESHOLD
  override for tests); verified rendering 2,000,000 points in-app
- METRIKA_AUTORUN debug hook for headless app driving
- MARKETING_VERSION 1.0.0
- 116 kit tests + 4 UI tests green

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

- MetrikaUITests target (xcodegen scheme test action)
- launch-environment hook (DEBUG only): sandboxed app materializes the
  test CSV in its own container, since the runner cannot stage files
  across the sandbox boundary reliably
- queries predicate on AX 'value' (SwiftUI Text exposes value, not label)
- smoke: launch, auto-load dataset, type gen + reg robust, assert
  regression table and sidebar variable

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

- MetrikaKit SPM package: ZQParser, ZQPlanner, ZQEngine, ZQData, ZQStats,
  ZQGPU, ZQGraphics, ZQPlugins (Swift 6, strict concurrency)
- ZQL parser: lexer, Pratt expressions, factor variables, prefix commands,
  column-cited errors with Levenshtein verb suggestions
- ZQData: DuckDB-backed load/save (parquet, csv, json, arrow)
- ZQStats: OLS via LAPACK QR, HC0-HC3 and cluster-robust SE, summarize,
  t/F distributions accurate in the far tails
- ZQGPU: Philox4x32-10 reference RNG, counter-addressable bootstrap
- ZQEngine: session actor with use/save/gen/replace/drop/keep/summarize/
  regress/count/list/graph/bootstrap/set seed/xtset/log
- SwiftUI app (xcodegen): console with history, variables sidebar,
  Swift Charts plots; sandboxed + hardened runtime entitlements
- Tests: 44 green (parser golden, R fixtures at 1e-10, Philox KAT,
  end-to-end engine); Tests/Fixtures/generate.R; Tests/Bench harness
- scripts: check_headers.sh + pre-commit hook, make_icns.sh, release.sh

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>