A solid reference for diagnosing slow page loads and fixing Core Web Vitals issues. You get benchmarks for LCP, FID, CLS, and INP, plus code snippets for measuring them with web-vitals and automating Lighthouse audits. The optimization strategies are organized by effort level, from quick compression wins to longer term architecture changes. The performance budget JSON and audit checklist are practical for keeping teams accountable. Nothing groundbreaking here, but it's a good starting template when you need to explain to stakeholders why the homepage feels sluggish or when Google Search Console flags your CLS score.
npx skills add https://github.com/secondsky/claude-skills --skill web-performance-audit