Home / secondsky / claude-skills · GitHub

react-best-practices SKILL.md skillA

react-best-practices from secondsky/claude-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add secondsky/claude-skills/react-best-practices@v1.0.0

Pins v1.0.0 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: secondsky/claude-skills
Path: plugins/react-best-practices/skills/react-best-practices/SKILL.md
Versions recorded: 3
Latest version: v1.0.0, committed Apr 2, 2026
First version recorded: Jan 17, 2026
Size: 6,035 bytes
Repository stars: 247
License: MIT

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.

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file 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
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add secondsky/claude-skills/react-best-practices@sha256:c726c4055411d580

The line at the top of this page pins the label v1.0.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

[![mdr](https://markdownregistry.com/badge/art_lwbrpuhkaq7ealmo.svg)](https://markdownregistry.com/a/art_lwbrpuhkaq7ealmo)

7 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 3 versions of this file, between Jan 17, 2026 and Apr 2, 2026, about one every 38 days.

version	committed	commit	size	audit
v1.0.0 latest	2026-04-02	89c5e89	6,035 B	A	view · diff
v1.0.0	2026-01-28	b0ce49c	6,042 B	A	view · diff
v1.0.0	2026-01-17	57fc7f1	5,316 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the 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 (6035 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

secondsky/claude-skills · 247 stars · license MIT · pushed 2026-10-31 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_lwbrpuhkaq7ealmo
GET https://markdownregistry.com/api/v1/resolve?ref=secondsky/claude-skills/react-best-practices
GET https://markdownregistry.com/api/v1/blob/c726c4055411d580d5a2abefaa9f9c5bc2761aee623aebbd54c450096a15d9f2

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

More from secondsky/claude-skills

AGENTS.md AGENTS.md file

secondsky/claude-skills · AGENTS.md

git:20260829.7ecf025 · audit A · 247 stars

CLAUDE.md CLAUDE.md file

secondsky/claude-skills · CLAUDE.md

git:20260917.a0994f7 · audit A · 247 stars

aceternity-ui SKILL.md skill

secondsky/claude-skills · plugins/aceternity-ui/skills/aceternity-ui/SKILL.md · 100+ animated React components (Aceternity UI) for Next.js with Tailwind. Use for hero sections, parallax, 3D effects…

v1.1.0 · audit A · 247 stars

api-authentication SKILL.md skill

secondsky/claude-skills · plugins/api-authentication/skills/api-authentication/SKILL.md · Secure API authentication with JWT, OAuth 2.0, API keys. Use for authentication systems, third-party integrations…