# Web Perf (agent skill)

> Web Perf is an agent skill (a SKILL.md file) from cloudflare/skills. Audit, diagnose, or optimize website loading and interaction performance, Core Web Vitals, and Lighthouse performance scores. It works with Claude Code, Codex, Cursor, GitHub Copilot and OpenCode and has 2,998 GitHub stars across a repository of 10 listed skills.

Audit, diagnose, or optimize website loading and interaction performance, Core Web Vitals, and Lighthouse performance scores. Your knowledge of web performance metrics, thresholds, and tooling APIs may be outdated. Prefer retrieval over pre-training when citing specific numbers or recommendations.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/cloudflare/skills |
| Skill path | skills/web-perf/SKILL.md |
| Skill name | web-perf |
| GitHub stars | 2,998 |
| Installs on skills.sh | 91,838 |
| License | Apache-2.0 |
| Skills in repo | 10 |
| Plugin marketplace | cloudflare |
| Official | yes |
| Works with | Claude Code, Codex, Cursor, GitHub Copilot, OpenCode |
| Category | Security |
| Last commit | Oct 1, 2026 |

## Add this skill

### Claude Code

```sh
/plugin marketplace add cloudflare/skills
/plugin install cloudflare@cloudflare
```

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/cloudflare/skills.git
cp -r skills/skills/web-perf .agents/skills/web-perf   # repo; ~/.agents/skills for all projects
```

### Cursor

```sh
git clone --depth 1 https://github.com/cloudflare/skills.git
cp -r skills/skills/web-perf .cursor/skills/web-perf   # 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/cloudflare/skills/web-perf

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