Webperf

This is a practical wrapper around Joan Leon's webperf-snippets collection, giving you 49 browser console snippets for measuring Core Web Vitals, debugging slow loads, and diagnosing jank. It works through the Chrome DevTools MCP server, so you can ask Claude to audit a page and it'll navigate there, run the appropriate snippet, and interpret the results against established thresholds. The skill is split into five focused areas (core vitals, loading, interaction, media, resources), which helps when you know whether you're chasing a slow TTFB or tracking down layout shifts. It's genuinely useful if you're doing performance work and want structured console output instead of manually running snippets. The color-coded results are a nice touch for readability.

Install to Claude Code

npx -y skills add nucliweb/webperf-snippets --skill webperf --agent claude-code