react-best-practices

React and Next.js performance optimization guide from Vercel Engineering (70 rules in 8 categories). Use when writing, reviewing, or refactoring React/Next.js code to eliminate waterfalls, reduce bundle size, prevent re-renders, optimize Server Components, or fix performance bottlenecks. Triggers on data fetching, Promise.all, Suspense, useMemo, dynamic imports, bundle analysis, code-splitting, and rendering…