Skip to content
mcp/skillhub

Agent Skill

Web Perf skill

web-perfcloudflare/skillsskills/web-perf/SKILL.md

Audit, diagnose, or optimize website loading and interaction performance, Core Web Vitals, and Lighthouse performance scores.

3.1kApache-2.0

always on

26 tokname + description

once used

2,017 tokSKILL.md body

bundled files

0

installs

106kskills.sh

Install the Web Perf skill

Skills CLI (Claude Code, Codex, Cursor and others)

npx skills add https://github.com/cloudflare/skills --skill web-perf

Claude Code, by hand (all projects)

git clone --depth 1 https://github.com/cloudflare/skills.git /tmp/skills
mkdir -p ~/.claude/skills
cp -R /tmp/skills/skills/web-perf ~/.claude/skills/web-perf

For one project only, copy the folder into .claude/skills/ in that project instead. The agent picks it up when a task matches its description.

What it costs your context

Agent Skills load in three steps. Tokens counted with the o200k tokenizer; your model's count will differ a little.

WhenWhat loadsCost
Every sessionName and description26 tok
When the agent uses itThe SKILL.md instructions2,017 tok
Only if openedNo bundled files—

Until it is used, web-perf costs about 52× less than the median MCP server we measured (1,362 tokens on every turn). Installing all 19 skills from cloudflare/skills would load 799 tokens of descriptions. Skills vs MCP study

Checks

Our checks found nothing to flag: it follows the Agent Skills specification's naming and size guidelines and doesn't pipe downloads into a shell.

Checked 2026-10-22 · method

What's inside

The headings of its SKILL.md. Read the full file on GitHub.

  • Web Performance Audit
  • Retrieval Sources
  • FIRST: Verify MCP Tools Available
  • Key Guidelines
  • Quick Reference
  • Workflow
  • Phase 1: Performance Trace
  • Phase 2: Core Web Vitals Analysis
  • Phase 3: Network Analysis
  • Phase 4: Accessibility Snapshot
  • Phase 5: Codebase Analysis
  • Detect Framework & Bundler
  • Tree-Shaking & Dead Code
  • Unused JS/CSS
  • Polyfills
  • Compression & Minification
  • Output Format

More skills from cloudflare/skills

All skills in this repo
  1. cloudflarecloudflare/skills

    Discover and choose Cloudflare products for apps, APIs, AI agents, storage, networking, and security. Use for architecture and product selection, including when the user describes a need without naming a Cloudflare product; then find the relevant skill or documentation.

    133k53 tok idle · 5,460 in use
  2. wranglercloudflare/skills

    Run or troubleshoot Wrangler CLI commands in projects that have a wrangler.jsonc, wrangler.json, or wrangler.toml file, including local development, Previews, deployment, and resource management. For new projects and projects without a Wrangler configuration file, use the cf CLI instead.

    125k60 tok idle · 2,166 in use
  3. workers-best-practicescloudflare/skills

    Cloudflare Workers best practices for production applications. Use when writing, reviewing, or configuring Workers.

    122k25 tok idle · 1,088 in use
  4. durable-objectscloudflare/skills

    Build, debug, or review Cloudflare Durable Objects code for persistent state and coordination.

    107k22 tok idle · 1,328 in use
  5. agents-sdkcloudflare/skills

    Build, debug, or review Cloudflare Agents SDK applications using the agents package.

    103k19 tok idle · 2,870 in use
  6. cloudflare-email-servicecloudflare/skills

    Implement or troubleshoot Cloudflare Email Sending and Email Routing integrations and their delivery configuration.

    99k21 tok idle · 1,456 in use
  7. turnstile-spincloudflare/skills

    Set up, repair, or migrate to Cloudflare Turnstile bot verification in an existing frontend and backend, including server-side Siteverify.

    89k533 tok idle · 6,533 in use
  8. cloudflare-onecloudflare/skills

    Design, configure, troubleshoot, or review Cloudflare One Zero Trust and SASE deployments. Use cloudflare-one-migrations for migration planning from other vendors.

    89k35 tok idle · 4,692 in use