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Website speed and Core Web Vitals audit v1.0.0

Use this resource to audit a website's loading speed and Core Web Vitals

New

  • 597 downloads
  • 145 likes
  • 174 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install website-performance-audit

With no option, the skill goes to ~/.agents/skills/; add --agent claude-code (or codex, cursor…) to target an agent.

First time: connect the CLI with

npx --yes palatekit@latest login

The agent opens your page in Chrome, records a performance trace and analyzes Core Web Vitals (LCP, CLS, INP). It then reviews network requests, accessibility and, if you give it the code, the build setup. You get a report with a metrics table, issues ranked by impact and quantified fixes.

Mostly picked by

Updated November 2, 2026

Performance audit report with Core Web Vitals and issues ranked by impact

Details

Works in
Install guides
Generates with
Your agent's model
Uses
  • Node.js
  • Chrome
  • Chrome DevTools MCP
Licence
Apache-2.0

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What you get

  • SKILL.md: a five-phase audit method, metric thresholds and a report format
  • A report with a Core Web Vitals summary and issues ranked by impact
  • Specific recommendations (file, size, fix) instead of general advice

Good fit for

  • Your site or online store loads slowly
  • You want a solid Lighthouse score before a launch
  • You want to know what to ask your developer to fix first

Not for

  • Optimizing a site that is offline or has no reachable URL
  • Measuring a native mobile app
  • Replacing continuous performance monitoring

Tags

  • performance
  • core web vitals
  • lighthouse
  • audit
  • website

About

You say

"Audit the speed of https://mysite.com, give me the Core Web Vitals and the three fixes that would save the most time."

Performance audit report with Core Web Vitals and issues ranked by impact

Skill published by Cloudflare under the Apache-2.0 license.

Show more

Prerequisites

You bring
The URL of the page to audit and The site's code folder, if you want fixes in the code
Dependencies
Node.js, Chrome, and Chrome DevTools MCP

How to use it

  1. Install the Chrome DevTools MCP in your agent
  2. Give the page URL, and the code folder if you have it
  3. Read the report and apply the fixes in order of impact

Content preview

Files

  • LICENSE11.3 KB
  • NOTICE-PALATEKIT.md0.4 KB
  • SKILL.md8.4 KB

Origin and licence

Modified by PalateKit

Author
cloudflare
Source
github.com/cloudflare/skills/tree/49a31e0b3229ccdffe4944be9c61bc7481d1d432/skills/web-perf
Licence
Apache-2.0

Notice

Version modifiée de « web-perf » (cloudflare, Apache-2.0) : traduction française et fiche par PalateKit.

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Frequently asked questions

What does the agent need to measure?

A Chrome DevTools MCP server. Without it, the agent only reviews code and network, and says which measurements it could not collect.

Can I audit a competitor's site?

Yes. The code analysis phase is skipped and the audit covers what is visible from the browser.