AGENTS.md@skills/react-best-practicesB
AGENTS.md@skills/react-best-practices from vercel-labs/agent-skills is an AGENTS.md file: the standing instructions coding agents read in that repo.
mdr add vercel-labs/agent-skills/skills/react-best-practices/AGENTS.md@git:20260414.dc8367ePins git:20260414.dc8367e in mdr.lock. Pin the fingerprint instead.
- Audit grade
- B, 13 of 14 checks passed
- Kind
- AGENTS.md file
- Repository
- vercel-labs/agent-skills
- Path
skills/react-best-practices/AGENTS.md- Versions recorded
- 5
- Latest version
- git:20260414.dc8367e, committed Apr 14, 2026
- First version recorded
- Mar 30, 2026
- Size
- 108,261 bytes
- Repository stars
- 32,701
- License
- none declared
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
# React Best Practices **Version 1.0.0** Vercel Engineering January 2026 > **Note:** > This document is mainly for agents and LLMs to follow when maintaining, > generating, or refactoring React and Next.js codebases. Humans > may also find it useful, but guidance here is optimized for automation > and consistency by AI-assisted workflows. --- ## Abstract Comprehensive performance optimization guide for React and Next.js applications, designed for AI agents and LLMs. Contains 40+ rules across 8 categories, prioritized by impact from critical (eliminating waterfalls, reducing bundle size) to incremental (advanced patterns). Each rule includes detailed explanations, real-world examples comparing incorrect vs. correct implementations, and specific impact metrics to guide automated refactoring and code generation. --- ## Table of Contents 1. [Eliminating Waterfalls](#1-eliminating-waterfalls) — **CRITICAL** - 1.1 [Check Cheap Conditions Before Async Flags](#11-check-cheap-conditions-before-async-flags) - 1.2 [Defer Await Until Needed](#12-defer-await-until-needed) - 1.3 [Dependency-Based Parallelization](#13-dependency-based-parallelization) …
Read the whole file at its exact version.
How to install
mdr add vercel-labs/agent-skills/skills/react-best-practices/AGENTS.md@sha256:fc93e7421177bbf8The line at the top of this page pins the label git:20260414.dc8367e, 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.
[](https://markdownregistry.com/a/art_gkaygi4gm3gbigq6)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Mar 30, 2026 and Apr 14, 2026, about one every 4 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260414.dc8367e latest | 2026-04-14 | dc8367e | 108,261 B | B | view · diff |
| git:20260414.805687f | 2026-04-14 | 805687f | 108,345 B | B | view · diff |
| git:20260402.93f5a2d | 2026-04-02 | 93f5a2d | 105,774 B | B | view · diff |
| git:20260331.39754d9 | 2026-03-31 | 39754d9 | 103,970 B | B | view · diff |
| git:20260330.2a941f1 | 2026-03-30 | 2a941f1 | 102,219 B | B | view |
Audit of the latest version
- fail: No script tag (matched: <script)
- pass: Size between 200 bytes and 200 KB (108261 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
Starting a new one? Use a template for AGENTS.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
vercel-labs/agent-skills · 32,701 stars · license none declared · pushed 2026-10-14 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_gkaygi4gm3gbigq6 GET https://markdownregistry.com/api/v1/resolve?ref=vercel-labs/agent-skills/skills/react-best-practices/AGENTS.md GET https://markdownregistry.com/api/v1/blob/fc93e7421177bbf869cce892bc60a6c83a4517d974bc3bf65c4e2c1e58a6ccf6
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: how to write a good AGENTS.md · AGENTS.md vs CLAUDE.md · which agent file does what.
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