P6: CI/CD Pipeline

[ryota-murakami]

P6: CI/CD Pipeline

GitHub Actions で品質ゲートを自動化。

Ref: SPEC.md §7.3 CI/CD
Dependencies: P1-P5
Scope: ~3 files

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Tasks

• Create .github/workflows/ci.yml:
  • Runner: macos-latest
  • Node 22 + pnpm setup
  • Steps: pnpm install --frozen-lockfile → pnpm lint → pnpm typecheck → pnpm test:coverage → pnpm build
• Add E2E test step: pnpm test:e2e in CI
• Configure coverage threshold gate (fail CI if below minimum)
• Add CI status badge to README.md
• Set up branch protection rule: require CI pass before merge to main
• Verify: Push a branch, confirm CI runs and passes