WatchOS

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.

skills.sh installs: 590
GitHub stars: 879
last updated: Aug 21, 2026

View on GitHub

Install

$ npx -y skills add rshankras/claude-code-apple-skills --skill watchOS --agent claude-code

Installs into .claude/skills of the current project.

Files

watchOS Development

Comprehensive guidance for watchOS app development with SwiftUI, Watch Connectivity, and complications.

When This Skill Activates

Use this skill when the user:

Is building a watchOS app or Watch extension
Asks about Watch Connectivity (iPhone ↔ Watch sync)
Needs help with complications or ClockKit
Wants to implement watch-specific UI patterns
Asks about WidgetKit complications or migrating from ClockKit to WidgetKit
Wants to build watch face complications (accessoryCircular, accessoryRectangular, accessoryCorner, accessoryInline)
Asks about HealthKit on watchOS, workout sessions, heart rate, or fitness tracking
Needs Extended Runtime sessions for background workout tracking
Wants to build watchOS widgets or Smart Stack widgets
Asks about widget relevance, Smart Stack ordering, or widget suggestions
Needs to share widgets cross-platform between iOS and watchOS
Asks about watchOS accessibility — VoiceOver, AssistiveTouch, or Dynamic Type on the Watch