performance
Optimize web performance for faster loading and better user experience. Use when asked to "speed up my site", "optimize performance", "reduce load time", "fix slow loading", "improve page speed", or "performance audit".
Before you install
- Last update
- Files in folder
- 3
- Scripts
- No script files found
- SKILL.md size
- 13 KB (about 3,453 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@performanceRuns 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@performance --agent claude-code -y- Project install writes to
.claude/skills/performance- Global install writes to
~/.claude/skills/performance
Start a new session afterwards so the agent picks the skill up. In Claude Code you can also call it directly with /performance.
What it does
Performance optimization Evidence-led performance optimization using real-user signals for prioritization and browser traces for diagnosis. Focuses on loading speed, runtime responsiveness, and resource delivery. How it works 1. If a page can run, read the measurement workflow and establish a field-plus-lab baseline before editing. 2. Prioritize poor real-user Core Web Vitals. Use a DevTools performance trace and its focused insights to find the cause. 3. Inspect and change only the code or assets connected to measured bottlenecks. 4. Re-run equivalent lab measurements and report before/after…
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
- accessibility
addyosmani/web-quality-skills
Audit and improve web accessibility following WCAG 2.2 guidelines. Use when asked to "improve accessibility", "a11y audit", "WCAG compliance", "screen reader support", "keyboard navigation", or "make accessible".
- seo
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Optimize for search engine visibility and ranking. Use when asked to "improve SEO", "optimize for search", "fix meta tags", "add structured data", "sitemap optimization", or "search engine optimization".
- web-quality-audit
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Run an evidence-led web quality audit covering performance, accessibility, SEO, best practices, and agentic browsing. Use when asked to "audit my site", "review web quality", "run lighthouse audit", "check page quality", or "optimize my website".
- core-web-vitals
addyosmani/web-quality-skills
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".
- best-practices
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Apply modern web development best practices for security, compatibility, and code quality. Use when asked to "apply best practices", "security audit", "modernize code", "code quality review", or "check for vulnerabilities".
- vercel-react-best-practices
vercel-labs/agent-skills
React and Next.js performance optimization guidelines from Vercel Engineering. This skill should be used when writing, reviewing, or refactoring React/Next.js code to ensure optimal performance patterns. Triggers on tasks involving React components, Next.js pages, data fetching, bundle optimization, or performance improvements.