Overview
What It Does
Web Perf packages a focused media & files workflow for an AI agent. Analyzes web performance using Chrome DevTools MCP. Measures Core Web Vitals (LCP, INP, CLS) and supplementary metrics (FCP, TBT, Speed Index), identifies render-blocking resources, network dependency chains, layout shifts, caching issues, and accessibility gaps. Use when asked to audit, profile, debug, or optimize page load performance, Lighthouse scores, or site speed. Biases towards retrieval from current documentation over pre-trained knowledge. It is best suited to users who can review the resulting actions and provide only the accounts, files, or command access needed for the task. It is not a substitute for human approval on destructive, financial, security-sensitive, or public-facing actions.
Task ideas
Popular Use Cases
- Create or edit a common file format
- Extract information from uploaded files
- Convert content into a polished deliverable
- Automate repetitive media operations
Installation
Install this Agent Skill
Claude Code
npx skills add https://github.com/cloudflare/skills --skill web-perfCommands derived from the public GitHub SKILL.md record. Checked 2026-09-02. Review the source before running them.
Before you start
Requirements
| Claude Code | Required / review |
| Codex | Required / review |
| Public SKILL.md source | Required / review |
| Review instructions and requested permissions before installation | Required / review |
| Paid service | Check source |
| Supported system | Check source |
Popularity context
Why It’s Popular
Web Perf is a verified Agent Skill from cloudflare with a public SKILL.md, compatible with Claude Code, Codex.
Alternatives
