source-command-quality

# source-command-quality Use this skill when the user asks to run the migrated source command `quality`. ## Command Template # Quality Assurance Maximize quality metrics: tests, coverage, performance, bundle size. ## Scope **Testing:** - Fix failing tests - Add missing tests (.test.ts for all modules) - Improve coverage (critical paths 100%, business logic 80%+) - Test edge cases - Test error paths - Integration tests - E2E tests (if applicable) **Benchmarking:** - Add benchmarks (.bench.ts for critical functions) - Measure performance - Identify regressions - Optimize slow operations **Performance:** - Profile hot paths - Optimize algorithms (reduce complexity) - Fix memory leaks - Reduce allocations - Cache expensive operations - Lazy load where possible **Bundle Size:** - Analyze bundle composition - Remove unused dependencies - Tree-shake effectively - Code split strategically - Compress assets - Use dynamic imports **Code Quality:** - Fix lint errors/warnings - Improve type safety (no `any`) - Reduce complexity - Improve maintainability - Follow code standards **Security:** - Fix vulnerabilities - Update dependencies - Validate inputs - Sanitize outputs - Secure defaults ## Execution ### 1. Test Coverage ```bash # Run tests with coverage npm run test:coverage # Identify gaps # Add tests for uncovered code # Focus on critical paths first ``` **Priority:** - Critical business logic (100%) - Error handling (100%) - Edge cases (90%) - Happy paths (100%) - Integration points (80%) ### 2. Benchmarking ```bash # Run benchmarks npm run bench # Compare against baseline # Identify regressions # Optimize bottlenecks ``` **Add benchmarks for:** - Algorithm complexity (O(n) vs O(n²)) - Database queries - API calls - Data processing - Rendering (if UI) ### 3. Performance Profiling ```bash # Profile application node --inspect ... # Or use Clinic.js, 0x, etc. # Identify bottlenecks # Optimize hot paths # Measure improvements ``` **Check:** - CPU usage - Memory usage - I/O operations - Network calls - Rendering time ### 4. Bundle Analysis ```bash # Analyze bundle npm run build -- --analyze # Check size ls -lh dist/ # Identify large dependencies # Remove unnecessary code ``` **Optimize:** - Remove unused dependencies - Use smaller alternatives - Dynamic imports for large modules - Tree-shake effectively - Minify properly ### 5. Quality Metrics **Track:** - Test coverage: `npm run test:coverage` - Bundle size: `ls -lh dist/` - Performance: `npm run bench` - Security: `npm audit` - Type coverage: TypeScript strict mode - Lint score: `npm run lint` ## Targets **Tests:** - Coverage: ≥80% (business logic ≥90%) - All critical paths: 100% - Build time: <30s - Test time: <10s **Performance:** - Page load: <3s - API response: <200ms - Time to interactive: <5s - Bundle size: <100KB (gzipped) **Quality:** - Zero lint errors - Zero `any` types (unless justified) - Zero security vulnerabilities (high/critical) - Complexity score: <10 per function ## Commit Strategy Atomic commits per improvement: - `test(auth): add tests for token validation` - `perf(db): optimize user query with batch loading` - `build: reduce bundle size by 40% with code splitting` ## Exit Criteria - [ ] All tests pass - [ ] Coverage meets targets - [ ] Benchmarks added for critical functions - [ ] Performance optimized - [ ] Bundle size reduced - [ ] No security vulnerabilities - [ ] Quality metrics improved Report: Coverage %, bundle size reduction, performance gains, benchmarks added.