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