React Performance

A well-organized collection of 70+ React and Next.js performance rules pulled from Vercel's engineering best practices, sorted into eight priority tiers from waterfalls to advanced patterns. You'd reach for this when reviewing code, auditing Core Web Vitals regressions, or tracking down why your server components are slow. The waterfall elimination section alone (parallel Promise.all, deferred awaits, Suspense boundaries) will catch most of the low-hanging fruit in typical Next.js apps. The bundle size guidance on direct imports versus barrel files is correct and commonly ignored. It's dense enough that you'll want to activate it during refactoring sessions rather than keeping it loaded all the time, but the priority index makes it easy to focus on what actually matters for your bottleneck.

Install to Claude Code

npx -y skills add affaan-m/ecc --skill react-performance --agent claude-code