Home / coco-research / coco · skills/vercel-react-best-practices/SKILL.md · GitHub

vercel-react-best-practices skillA

vercel-react-best-practices is agent-read markdown (skill) from coco-research/coco: Use when writing, reviewing, or refactoring React or Next.js code, or optimizing data fetching, bundle size, and re-renders. Applies Vercel impact-prioritized performance rules organized into 8 categories..

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

What the file says

# Vercel React Best Practices

Comprehensive performance optimization guide for React and Next.js applications, maintained by Vercel. Contains 57 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
…

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How to install

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Versions

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v1.0.0 latest2026-09-14 e75f220 6,063 BA view · diff
v1.0.02026-08-02 1479e32 6,185 BA view · diff
v1.0.02026-04-26 d53cc6c 6,165 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (6063 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

coco-research/coco · 478 stars · license NOASSERTION · pushed 2026-09-25 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_agcmgk2nclmborfc
GET https://markdownregistry.com/api/v1/resolve?ref=coco-research/coco/vercel-react-best-practices
GET https://markdownregistry.com/api/v1/blob/fbda1daf6ca75b5e5b0a8e6c147fb3396e7ffa7af687d24aad7ed47251593238

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