This is a comprehensive watchOS development skill that covers the full stack of building Apple Watch apps, from SwiftUI interfaces to Watch Connectivity syncing between iPhone and Watch. It handles both the newer WidgetKit complications and legacy ClockKit patterns, which is helpful if you're maintaining older apps or migrating. The skill also covers HealthKit integration for fitness tracking and Extended Runtime sessions for background workouts. With 271 installs and solid security audit passes, it seems to be the go-to for anyone building serious watchOS apps. The activation triggers are well-defined, so it should stay out of your way when you're working on iPhone-only code.
npx skills add https://github.com/rshankras/claude-code-apple-skills --skill watchos