# React Performance (agent skill)

> React Performance is an agent skill (a SKILL.md file) from affaan-m/ECC. React and Next.js performance optimization patterns adapted from Vercel Engineering's React Best Practices (https://github.com/vercel-labs/agent-skills). It works with Claude Code, Codex, Cursor, Gemini CLI, GitHub Copilot and OpenCode and has 274,402 GitHub stars across a repository of 10 listed skills.

React and Next.js performance optimization patterns adapted from Vercel Engineering's React Best Practices (https://github.com/vercel-labs/agent-skills). Organizes 70+ rules across 8 priority categories — waterfalls, bundle size, server-side, client fetching, re-render, rendering, JS micro-perf, advanced. Use when writing, reviewing, or refactoring React/Next.js code for performance.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/affaan-m/ECC |
| Skill path | skills/react-performance/SKILL.md |
| Skill name | react-performance |
| GitHub stars | 274,402 |
| Installs on skills.sh | 2 |
| License | MIT |
| Skills in repo | 10 |
| Plugin marketplace | ecc |
| Official | no |
| Works with | Claude Code, Codex, Cursor, Gemini CLI, GitHub Copilot, OpenCode |
| Category | Design & frontend |
| Last commit | Oct 2, 2026 |

## When it triggers

- Use when writing, reviewing, or refactoring React/Next.

## Add this skill

### Claude Code

```sh
/plugin marketplace add affaan-m/ECC
/plugin install ecc@ecc
```

In the Claude apps, zip the skill folder and upload it under Customize > Skills > + > Upload a skill (code execution must be on).

### ChatGPT / Codex

```sh
git clone --depth 1 https://github.com/affaan-m/ECC.git
cp -r ECC/skills/react-performance .agents/skills/react-performance   # repo; ~/.agents/skills for all projects
```

### Cursor

```sh
git clone --depth 1 https://github.com/affaan-m/ECC.git
cp -r ECC/skills/react-performance .cursor/skills/react-performance   # project; ~/.cursor/skills for all projects
```

Sources (checked 2026-10-07): https://code.claude.com/docs/en/skills, https://support.claude.com/en/articles/12512180-using-skills-in-claude, https://learn.chatgpt.com/docs/build-skills, https://cursor.com/docs/context/skills

skills.sh listing: https://www.skills.sh/affaan-m/ECC/react-performance

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