Lighthouse audits and Core Web Vitals — LCP, CLS, INP. Use when optimising page load, layout shift, input delay, images, fonts or render-blocking resources.
Install
npx skills add dembrandt/dembrandt-skills --skill performance-and-web-vitalsnpx skills add dembrandt/dembrandt-skills --skill performance-and-web-vitals -a claude-code -gnpx skills add dembrandt/dembrandt-skills --skill performance-and-web-vitals -a codex -ggemini skills install https://github.com/dembrandt/dembrandt-skills.git --path skills/performance-and-web-vitalsgh skill install dembrandt/dembrandt-skills performance-and-web-vitalsgit clone --depth 1 https://github.com/dembrandt/dembrandt-skills /tmp/dembrandt__dembrandt-skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/dembrandt__dembrandt-skills/skills/performance-and-web-vitals ~/.claude/skills/performance-and-web-vitals # Claude Code
cp -R /tmp/dembrandt__dembrandt-skills/skills/performance-and-web-vitals ~/.agents/skills/performance-and-web-vitals # Codex, Cursor, Gemini CLI, Copilot, OpenCode