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openspec/archive/2026-04-25-enterprise-font-subset/tasks.md

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+# Tasks: enterprise-font-compress
+
+**Change ID**: enterprise-font-compress
+**Package**: `@suaveplan/font-compress`
+**Target path**: `universal/compression/font-compress`
+**Prerequisite packages on Verdaccio**: `@suaveplan/error`, `@suaveplan/types`, `@suaveplan/mime`
+
+---
+
+## 1. Scaffold
+
+- [ ] Create directory `universal/compression/font-compress/` with `src/`, `tests/`, `src/__benchmarks__/`, and all feature subdirectories per the layout in `proposal.md`.
+- [ ] Write `package.json` at version `0.1.0` with `"type": "module"`, `"sideEffects": false`, full `exports` map, deps: `@suaveplan/error workspace:^`, `@suaveplan/types workspace:^`, `@suaveplan/mime workspace:^`, `zod catalog:forms`, `@opentelemetry/api catalog:observability`.
+- [ ] Write `tsconfig.json` extending `@suaveplan/typescript-config/library.json`.
+- [ ] Write `vitest.config.ts` using `createTestConfig()` from `@suaveplan/testing/config`.
+- [ ] Add `lint`, `typecheck`, `test`, `test:coverage`, `build`, `docs:check` scripts.
+
+---
+
+## 2. Types + errors
+
+- [ ] Write `src/types/common.ts` — `FontFormat`, `FontMetadata`, `SubsetOptions`, `CompressFontOptions`, `FontCompressResult`, `FontCompressAdapter`, `FontCompressorOptions`.
+- [ ] Write `src/types/common.md`.
+- [ ] Write `src/error-codes.ts` — `FontCompressErrorCode`, `FONT_COMPRESS_ERROR_METADATA`, `registerFontCompressErrorCodes()`.
+- [ ] Write Zod schemas: `SubsetOptionsSchema`, `CompressFontOptionsSchema`, `FontMetadataSchema`, `FontCompressResultSchema`, `FontCompressorOptionsSchema`.
+
+---
+
+## 3. NullFontCompressAdapter
+
+- [ ] Implement `NullFontCompressAdapter` — `probe` returns configurable fixture metadata, `compress` returns input bytes with a fixture result (ratio = 0.9, same format as outputFormat).
+- [ ] Write `null-adapter.test.ts` and `null-adapter.md`.
+
+---
+
+## 4. Utils
+
+- [ ] Implement `parseUnicodeRanges(ranges: string[]): Set<number>` — parses `U+XXXX` and `U+XXXX-XXXX`; throws `FontCompressError(FONT_COMPRESS_INVALID_OPTIONS)` on bad syntax.
+- [ ] Implement `detectFontFormat(data: Uint8Array): FontFormat` — delegates to `@suaveplan/mime` magic-byte sniff.
+- [ ] Write `unicode-ranges.test.ts`, `unicode-ranges.md`, `format-detect.test.ts`, `format-detect.md`.
+
+---
+
+## 5. FontCompressor
+
+- [ ] Implement `FontCompressor` — `probe` and `compress` delegate to adapter; wire `AbortSignal`; validate options via Zod.
+- [ ] Wire OTel: span `font.compress`, counter `font_compress_total`, histogram `font_compress_duration_ms` + `font_compress_ratio`.
+- [ ] Write `font-compressor.test.ts` (≤500 lines): probe, compress, abort, unsupported format throws.
+- [ ] Write `font-compressor.md`.
+
+---
+
+## 6. Benchmarks
+
+- [ ] Write `src/__benchmarks__/font-compress.bench.ts` — probe 200 kB TTF fixture, WOFF2 encode (null adapter), subset ASCII range.
+
+---
+
+## 7. Tests
+
+- [ ] Write `tests/integration.test.ts` — full pipeline with NullFontCompressAdapter.
+- [ ] Write `tests/property.test.ts` (fast-check) — compressed size ≤ original, ratio ∈ (0, 1].
+
+---
+
+## 8. Docs + verify + publish
+
+- [ ] All co-located `.md` files (≥200 words each).
+- [ ] Write `README.md` at package root.
+- [ ] `bunx turbo lint typecheck test --filter=@suaveplan/font-compress` — green.
+- [ ] `bunx turbo test:coverage --filter=@suaveplan/font-compress` — 100%.
+- [ ] `bun scripts/publish.ts --package @suaveplan/font-compress`.
+- [ ] Archive to `openspec/archive/2026-04-24-enterprise-font-compress/`.