This covers all the ways your app shows up outside itself: widgets, Live Activities, notifications, complications, App Clips, and the rest of Apple's system surfaces. It's comprehensive HIG guidance with cross-references and specific constraints for each format. Use it when you're designing a widget family or figuring out whether to build an App Clip versus a full download. The structure is solid with a reference index, output format template, and questions to guide the design conversation. What stands out is the practical framing around glanceability, update budgets, and deep linking, which are the things that actually trip people up when moving from in-app to system-level experiences.
npx skills add https://github.com/raintree-technology/apple-hig-skills --skill hig-components-system