core-web-vitals
Optimize Core Web Vitals (LCP, INP, CLS) for better page experience using field and lab evidence. Use when asked to "improve Core Web Vitals", "fix LCP", "reduce CLS", "optimize INP", "page experience optimization", or "fix layout shifts".
Before you install
- Last update
- Files in folder
- 4
- Scripts
- No script files found
- SKILL.md size
- 9.5 KB (about 2,444 tokens of context each time it loads)
- License
- MIT
- Source on GitHub
- addyosmani/web-quality-skills
Skills are plain text instructions the agent follows, sometimes with scripts. Check the source, prefer repositories with many installs and stars, and read any script it ships.
Install
npx skills add addyosmani/web-quality-skills@core-web-vitalsRuns in a terminal with Node.js 18 or newer. Add -y to skip the prompts and -g to install for every project instead of this one.
Install for your agent
npx skills add addyosmani/web-quality-skills@core-web-vitals --agent claude-code -y- Project install writes to
.claude/skills/core-web-vitals- Global install writes to
~/.claude/skills/core-web-vitals
Start a new session afterwards so the agent picks the skill up. In Claude Code you can also call it directly with /core-web-vitals.
What it does
Core Web Vitals optimization Targeted optimization for the three Core Web Vitals using field data to identify user impact and browser traces to diagnose causes. Measure before optimizing When a runnable URL is available, read the performance measurement workflow. Prefer this sequence: 1. Check page-level CrUX p75 data, with a clearly labeled origin fallback when page data is unavailable. 2. Record a browser performance trace under stated conditions. With Chrome DevTools MCP, trace summaries can include CrUX alongside the observed lab metrics. 3. Analyze only the insights associated with the…
Excerpt from the skill's own SKILL.md. Read the full file on GitHub before installing: skills run with your agent's permissions.
Categories
Related skills
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