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Web Perf

Official
cloudflare·vlatest·frontend·Apache-2.0

Analyzes website performance metrics from Cloudflare data to identify bottlenecks and optimization opportunities.

Repository

Install on your platform

Showing Claude Code. One command installs this skill into any of the agents below.

  1. 1

    Run this in your project

    terminal
    $ npx skills add cloudflare/skills --skill web-perf -a claude-code

  2. Uses the open-source skills CLI and needs Node.js. Add -g to install it for your user instead of this project.

What we know about this skill

Publisher

cloudflare

Matched to the vendor's own GitHub organisation.

Install target

Live repository

Not pinned. Installing fetches whatever the repository holds at the time you run the command.

No human has reviewed this code. The checks below are a static scan of the files at one commit — nobody has run this skill or judged whether it works. A skill runs with whatever access you give your agent, so read the source before you install it.

Automated safety checks

scanned

This skill passed all 6 checks. We read its files at one commit and looked for the things that make a skill dangerous to run — not for whether it works.

  • Declares what it does: passed

    SKILL.md parses and declares a name and a description.

    SKILL.md exists, its frontmatter parses, and it declares a name and a description.

  • No undeclared network calls: passed

    Makes no network calls.

    Every host the skill dials — from its scripts, its config endpoints or the commands it tells the agent to run — is either well-known package and API infrastructure or declared in its own frontmatter. Links in documentation are not counted.

  • No obfuscated payloads: passed

    No encoded or obfuscated payloads.

    No base64, hex or compressed blob is decoded and then executed, and no encoded shell commands.

  • No credential access: passed

    Reads no keys, tokens, keychains or credential files.

    Neither the code nor the SKILL.md instructions read SSH keys, cloud credentials, keychains, token stores, browser cookie databases or dotfiles that hold secrets.

  • No pipe-to-shell installers: passed

    No pipe-to-shell or download-and-run installers.

    No `curl … | sh` pattern, in the code or in the instructions, that runs code fetched at run time.

  • Pinned to a commit: passed

    Scanned cloudflare/skills at 86505e44f8.

    The exact upstream commit SHA that was scanned is recorded, so the result refers to specific bytes.

Commit
86505e44f8
Manifest
skills/web-perf/SKILL.md
Scanned
1 file, 186 lines
This is a static scan, not a review. It reads the skill's files; it does not run them, and it cannot tell you whether the skill is any good or whether the code does what its description says. A skill runs with whatever access you give your agent.
What each check looks for →

About this skill

What it does

The web-perf skill provides tools and insights to analyze, optimize, and monitor website performance. It helps identify bottlenecks in page load times, resource delivery, and overall user experience by leveraging metrics such as Time to First Byte (TTFB), Largest Contentful Paint (LCP), and Cumulative Layout Shift (CLS).

When to use it

  • To diagnose slow-loading pages on a website.
  • Before deploying new features or updates to ensure performance remains optimal.
  • When preparing for high traffic events like product launches or marketing campaigns.
  • To comply with web performance standards such as Google’s Core Web Vitals.

Key capabilities

  • Analyzes page load times and identifies slow resources.
  • Monitors real-time performance metrics across different devices and locations.
  • Provides actionable optimization recommendations based on performance data.
  • Integrates with existing monitoring tools for continuous tracking.

Example prompts

  • "Analyze the performance of my website and identify areas for improvement."
  • "What is the Largest Contentful Paint (LCP) score for this page?"
  • "Generate a report comparing the load times of different versions of our homepage."

Tips & gotchas

  • Ensure that your website has proper access controls in place to allow the skill to collect performance data without exposing sensitive information.
  • Some metrics may require user interaction or specific browser support, so test across multiple environments for accurate results.