vercel-react-best-practices

name	vercel-react-best-practices
description	React and Next.js performance optimization guidelines from Vercel Engineering. This skill should be used when writing, reviewing, or refactoring React/Next.js code to ensure optimal performance patterns. Triggers on tasks involving React components, Next.js pages, data fetching, bundle optimization, or performance improvements.
license	MIT
metadata	{"author":"vercel","version":"1.0.0"}
skill_id	engineering_agentops.react_best_practices
executor	LLM_BEHAVIOR
status	ADOPTED
security	{"level":"standard","pii":false,"approval_required":false}
anchors	["engineering","agent","orchestration"]
tier	1
input_schema	[{"name":"code_or_task","type":"string","description":"Code snippet, script, or task description to process","required":true}]
output_schema	[{"name":"report","type":"string","description":"Analysis report or summary from vercel react best practices"}]
what_if_fails	FALLBACK: If Vercel React Best Practices cannot complete, provide partial results with explicit gaps noted. Never block workflow silently. ESCALATE: If core capability is unavailable, suggest nearest alternative skill. RULE: Always explain what failed and what manual steps can substitute.

Vercel React Best Practices

Comprehensive performance optimization guide for React and Next.js applications, maintained by Vercel. Contains 70 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-cheap-condition-before-await - Check cheap sync conditions before awaiting flags or remote values
• 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)