This is Vercel's performance optimization guide turned into a skill, with 45 rules across eight categories from critical waterfalls to advanced patterns. It's meant for writing, reviewing, or refactoring React and Next.js code. The rules are prioritized by impact, so you get the big wins first: eliminating request waterfalls, cutting bundle size with better imports, then working down through server optimizations and client re-render patterns. Each rule has a prefix like `async-` or `bundle-` and includes before/after examples. Honest take: the categorization and priority system make this more useful than a flat checklist, though you'll still need judgment about which rules matter for your specific bottleneck.
npx skills add https://github.com/davila7/claude-code-templates --skill react-best-practices