react-best-practices

name	react-best-practices
description	React best-practices reviewer for TSX files. Triggers after editing multiple TSX components to run a condensed quality checklist covering component structure, hooks usage, accessibility, performance, and TypeScript patterns.
metadata	{"priority":4,"docs":["https://react.dev/reference/react","https://react.dev/learn"],"pathPatterns":["src/components/**/*.tsx","src/components/**/*.jsx","app/components/**/*.tsx","app/components/**/*.jsx","components/**/*.tsx","components/**/*.jsx","src/ui/**/*.tsx","lib/components/**/*.tsx"],"bashPatterns":[],"importPatterns":["react","react-dom"]}
validate	[{"pattern":"from\\s+['\"](styled-components|@emotion/styled|@emotion/react|@mui/material|@chakra-ui/react)['\"]|styled\\.","message":"Legacy CSS-in-JS or component library detected. Consider shadcn/ui + Tailwind for modern Vercel-native UI.","severity":"warn","upgradeToSkill":"shadcn","upgradeWhy":"Migrate from CSS-in-JS/MUI/Chakra to shadcn/ui + Tailwind CSS for better SSR performance and Vercel ecosystem alignment.","skipIfFileContains":"@/components/ui|shadcn|tailwindcss"}]
retrieval	{"aliases":["react review","component quality","tsx linter","react patterns"],"intents":["review react code","improve component quality","check accessibility","optimize react"],"entities":["hooks","accessibility","React","TSX","component"]}
chainTo	[{"pattern":"from\\s+['\\\"](styled-components|@emotion/styled|@emotion/react|@mui/material|@chakra-ui/react)['\"]|styled\\.","targetSkill":"shadcn","message":"Legacy CSS-in-JS or component library detected — loading shadcn/ui guidance for modern Vercel-native UI."}]

Vercel React Best Practices

Comprehensive performance optimization guide for React and Next.js applications, maintained by Vercel. Contains 64 rules across 8 categories, prioritized by impact to guide automated refactoring and code generation.

When to Apply

Reference these guidelines when:

• Writing new React components or Next.js pages
• Implementing data fetching (client or server-side)
• Reviewing code for performance issues
• Refactoring existing React/Next.js code
• Optimizing bundle size or load times

Rule Categories by Priority

Priority	Category	Impact	Prefix
1	Eliminating Waterfalls	CRITICAL	async-
2	Bundle Size Optimization	CRITICAL	bundle-
3	Server-Side Performance	HIGH	server-
4	Client-Side Data Fetching	MEDIUM-HIGH	client-
5	Re-render Optimization	MEDIUM	rerender-
6	Rendering Performance	MEDIUM	rendering-
7	JavaScript Performance	LOW-MEDIUM	js-
8	Advanced Patterns	LOW	advanced-

Quick Reference

1. Eliminating Waterfalls (CRITICAL)

• async-defer-await - Move await into branches where actually used
• async-parallel - Use Promise.all() for independent operations
• async-dependencies - Use better-all for partial dependencies
• async-api-routes - Start promises early, await late in API routes
• async-suspense-boundaries - Use Suspense to stream content

2. Bundle Size Optimization (CRITICAL)

• bundle-barrel-imports - Import directly, avoid barrel files