Danijel Martinek
412d994733
Lands L1 of the agent-first coverage architecture (ADR-020) — the
cover-the-diff gate. Reads a merged lcov + git diff against a base
ref, asserts every changed *executable* line was exercised.
Script: scripts/coverage/diff.mjs (zero-dep Node ESM)
- parseLcov: SF -> Map<line, count>; only DA records read
- parseGitDiff: parses --unified=0 output into Map<file, Set<line>>
- computeDiffCoverage: cross-references both, emits result tree
- Allowlist of paths that don't gate (tests, configs, docs, .sh,
DI bootstrap, interfaces, CMS, factories, contracts, UI)
- Path matching handles three lcov path conventions: absolute,
repo-relative, and per-package relative
- CLI flags: --base (default origin/main), --lcov (default
coverage/lcov.info), --json (suppress stderr summary)
- stdout: machine-readable JSON for the dispatch loop
- stderr: human summary
- Exit 0 on pass, 1 on fail or error
Test surface: scripts/coverage/diff.test.mjs (14 tests, all green)
- Fixtures at scripts/coverage/__fixtures__/{sample.lcov,sample-diff.patch}
- Covers: lcov parsing, diff parsing, pass path, uncovered lines,
non-executable line skipping, no-coverage-data detection,
allowlist filtering, end-to-end mixed case, path matching
Wired:
- root package.json adds "coverage:diff" script
- .gitignore anchored so per-package coverage/ stays ignored but
scripts/coverage/ stays tracked
Smoke-tested end-to-end against packages/auth/coverage/lcov.info —
correctly skips shell scripts + manifest files (via allowlist + path
suffix match), correctly flags files not present in the per-package
lcov (which is expected; full repo coverage needs the L2 aggregate
that the next story lands).
CI integration deferred to the L2 aggregate story (the merged
coverage/lcov.info this script reads doesn't exist yet — pnpm
coverage:aggregate produces it).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
47 lines
1.5 KiB
JSON
47 lines
1.5 KiB
JSON
{
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"name": "template",
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"private": true,
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"packageManager": "pnpm@9.15.4",
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"engines": {
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"node": ">=20"
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},
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"scripts": {
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"build": "turbo run build",
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"dev": "turbo run dev",
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"lint": "turbo run lint",
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"test": "turbo run test",
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"test:e2e": "turbo run test:e2e",
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"test:stories": "turbo run test:stories",
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"test:visual": "pnpm --filter @repo/storybook exec concurrently -k -s first -n 'SB,VRT' -c 'magenta,blue' 'pnpm --filter @repo/storybook exec http-server storybook-static --port 6006 --silent' 'pnpm --filter @repo/storybook exec wait-on tcp:6006 && pnpm exec playwright test'",
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"typecheck": "turbo run typecheck",
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"conformance": "node scripts/conformance.mjs",
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"coverage:diff": "node scripts/coverage/diff.mjs",
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"fallow": "fallow",
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"fallow:audit": "fallow audit --base main",
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"work": "node scripts/work/cli.mjs",
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"format": "prettier --write \"**/*.{ts,tsx,js,jsx,json,md}\"",
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"format:check": "prettier --check \"**/*.{ts,tsx,js,jsx,json,md}\"",
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"prepare": "husky"
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},
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"devDependencies": {
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"@ai-hero/sandcastle": "*",
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"@playwright/test": "^1.49.0",
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"@turbo/gen": "^2.4.0",
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"@types/node": "^22.0.0",
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"fallow": "^2.73.0",
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"husky": "^9.0.0",
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"lint-staged": "^16.0.0",
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"prettier": "^3.5.0",
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"turbo": "^2.4.0",
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"typescript": "^5.8.0"
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},
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"lint-staged": {
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"*.{ts,tsx,js,mjs,jsx}": [
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"eslint --fix --max-warnings=0 --no-warn-ignored"
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],
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"*.{ts,tsx,js,mjs,jsx,json,md,yml,yaml}": [
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"prettier --write"
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]
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}
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}
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