# Webperf (agent skill)

> Webperf is an agent skill (a SKILL.md file) from nucliweb/webperf-snippets. Web performance measurement and debugging toolkit. It works with Claude Code, Cursor, Gemini CLI and OpenCode and has 1,454 GitHub stars across a repository of 2 listed skills. Install it by copying the skill folder into your agent's skills directory.

Web performance measurement and debugging toolkit. Use when the user asks about web performance, wants to audit a page, or says "analyze performance", "debug lcp", "check ttfb", "measure core web vitals", "audit images", or similar. A collection of 56 JavaScript snippets for measuring and debugging web performance in Chrome DevTools. Each snippet runs in the page and returns a structured result object.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/nucliweb/webperf-snippets |
| Skill path | skills/webperf/SKILL.md |
| Skill name | webperf |
| GitHub stars | 1,454 |
| Installs on skills.sh | not listed |
| License | MIT |
| Skills in repo | 2 |
| Plugin marketplace | webperf-snippets |
| Official | no |
| Works with | Claude Code, Cursor, Gemini CLI, OpenCode |
| Category | Security |
| Last commit | Oct 26, 2026 |

## When it triggers

- Use when the user asks about web performance, wants to audit a page, or says "analyze performance", "debug lcp", "check ttfb", "measure core web vitals", "audit images", or similar.
- "analyze performance"
- "debug lcp"
- "check ttfb"
- "measure core web vitals"
- "audit images"

## Add this skill

### Claude Code

```sh
/plugin marketplace add nucliweb/webperf-snippets
/plugin install webperf@webperf-snippets
```

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/nucliweb/webperf-snippets.git
cp -r webperf-snippets/skills/webperf .agents/skills/webperf   # repo; ~/.agents/skills for all projects
```

### Cursor

```sh
git clone --depth 1 https://github.com/nucliweb/webperf-snippets.git
cp -r webperf-snippets/skills/webperf .cursor/skills/webperf   # 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

---

Canonical page: https://appsgit.com/skills/nucliweb-webperf
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