This one reads multiple pattern libraries from ux-extract and walks them side by side, category by category, to show you where apps converge (safe default), where they diverge (design choice you need to make), and what's missing across the board. The output is an opinionated comparison document with recommendations, not just a pile of bullets from five different apps. Use it before you build a feature to figure out what the convention is and whether you should follow it. It's most useful when you've already extracted 3 to 5 reference apps in the same domain and need to turn that library into an actual decision about what to ship.
npx skills add https://github.com/jezweb/claude-skills --skill ux-compare