Signals scout for Core Web Vitals (`$web_vitals`). Watches each page's p75 LCP / INP / CLS / FCP against Google's thresholds and its own history — poor-band pages, band crossings, sharp regressions — and dates each regression against deploys and flag rollouts.
Install
npx skills add PostHog/ai-plugin --skill signals-scout-web-vitalsnpx skills add PostHog/ai-plugin --skill signals-scout-web-vitals -a claude-code -gnpx skills add PostHog/ai-plugin --skill signals-scout-web-vitals -a codex -ggemini skills install https://github.com/PostHog/ai-plugin.git --path skills/signals-scout-web-vitalsgh skill install PostHog/ai-plugin signals-scout-web-vitalsgit clone --depth 1 https://github.com/PostHog/ai-plugin /tmp/PostHog__ai-plugin
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/PostHog__ai-plugin/skills/signals-scout-web-vitals ~/.claude/skills/signals-scout-web-vitals # Claude Code
cp -R /tmp/PostHog__ai-plugin/skills/signals-scout-web-vitals ~/.agents/skills/signals-scout-web-vitals # Codex, Cursor, Gemini CLI, Copilot, OpenCode