Audit and fix runtime performance (Core Web Vitals, load priority). Use when "slow page", "LCP/INP/CLS", "fetchpriority", "long tasks", or "bfcache". JS payload → audit-bundle-size. Instant nav → enhance-web-instant-nav. Load limits → test-load.
Install
npx skills add kensaurus/skills --skill audit-performancenpx skills add kensaurus/skills --skill audit-performance -a claude-code -gnpx skills add kensaurus/skills --skill audit-performance -a codex -ggemini skills install https://github.com/kensaurus/skills.git --path skills/audit-performancegh skill install kensaurus/skills audit-performancegit clone --depth 1 https://github.com/kensaurus/skills /tmp/kensaurus__skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/kensaurus__skills/skills/audit-performance ~/.claude/skills/audit-performance # Claude Code
cp -R /tmp/kensaurus__skills/skills/audit-performance ~/.agents/skills/audit-performance # Codex, Cursor, Gemini CLI, Copilot, OpenCode