performance-optimization

SUMMARY

What it does

This Agent Skill provides a structured workflow for optimizing application performance across frontend, backend, queries, and databases. It emphasizes measuring before optimizing, identifying actual bottlenecks, fixing anti-patterns, verifying improvements, and guarding against regressions. The skill includes guidance on Core Web Vitals targets, optimization workflow steps, common anti-patterns (N+1 queries, unbounded data fetching, missing indexes, connection pool exhaustion, missing image optimization, unnecessary re-renders, large bundle size, missing caching), verification and revert criteria, and regression guarding. It also provides checklists and red flags. The skill is designed for use when performance requirements exist, regressions are suspected, or profiling reveals bottlenecks. It is not for premature optimization without evidence.