70 React and Next.js performance rules from Vercel Engineering, ranked by impact: request waterfalls, bundle size, server components, re-renders. One reference file per rule.
Reviews UI code against Vercel's Web Interface Guidelines, always pulling the latest rule list, and reports short findings with file and line.
Vercel's React Native and Expo rules for list performance, animation, navigation and UI patterns, one reference per rule.
React component API patterns from Vercel: compound components, lifted state, no boolean prop sprawl, React 19 APIs.
How to animate state and route changes with React's ViewTransition, transition types and view-transition CSS, including Next.js specifics.