What problem does it solve? React and Next.js codebases often suffer from slow load times, data-fetching waterfalls, bloated bundles, and unnecessary re-renders. This Skill provides a structured, impact-prioritized rule set from Vercel Engineering so AI agents and developers consistently apply proven performance patterns when writing, reviewing, or refactoring code. ## Core Features & Use Cases - 70 Prioritized Rules Across 8 Categories: Covers eliminating async waterfalls, bundle size optimization, server-side performance, client-side data fetching, re-render optimization, rendering performance, JavaScript micro-optimizations, and advanced React patterns. - Incorrect vs. Correct Code Examples: Each rule includes concrete TypeScript/TSX examples showing the anti-pattern and the optimized implementation, with impact metrics like 2-10x improvements or 200-800ms import cost reductions. - Use Case: When refactoring a Next.js page that sequentially awaits multiple fetches, apply the async rules to parallelize with Promise.all() and add strategic Suspense boundaries so the layout renders immediately while data streams in. ## Quick Start Review my Next.js page component using the vercel-react-best-practices skill and fix any data-fetching waterfalls or bundle size issues.
