Comprehensive performance and architecture optimization for React and Next.js. Use this for code reviews, refactoring, or building new components.
Installation
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Comprehensive performance and architecture optimization for React and Next.js. Use this for code reviews, refactoring, or building new components.
allowed-tools
["grep_search","view_file"]
vercel-react-best-practices
Optimizes React and Next.js applications using Vercel Engineering's 70+ rules across 8 categories.
Phase 1: Audit & Identify
Scan the codebase for common performance bottlenecks and anti-patterns.
Tools: grep_search or rg for specific hooks (useEffect, useState), Server Components, and Layout patterns.
Focus: RSC vs. Client Component boundaries, hydration mismatches, and waterfall fetches.
Phase 2: Category Analysis
Evaluate the code against these 8 core categories:
Performance: Bundle size, re-renders, and memoization.
RSC Optimization: Minimizing Client Component usage, data fetching patterns.
Hydration: Preventing mismatches, using Suspense correctly.
Data Fetching: Using fetch in RSC, cache tags, and revalidation.
State Management: Avoiding prop drilling, choosing the right hook.
Form Handling: Server Actions vs. traditional forms.
Routing: Layout vs. Page structure, segment config.
Security: Sanitizing inputs, CSRF protection in Server Actions.
Phase 3: Severity Ranking
Assign a priority to each finding:
P0 (Critical): Hydration errors, security gaps (missing auth in Server Actions).
P1 (High): Large bundle size regressions, blocking waterfalls.
P2 (Medium): Suboptimal hook usage, minor re-render issues.
P3 (Low): Style improvements, naming conventions.
Phase 4: Recommendation
Propose specific code changes using the "Fix it" or "Refactor it" pattern. Explain the "Why" behind each change (e.g., "Moving this to an RSC reduces client bundle by 20KB").
