Coordinate iPhone–watch data synchronization using WatchConnectivity patterns.
npx skills add https://github.com/chmc/listall --skill watch-connectivity-chmc
Please help me install this Agent Skill. Skill: watch-connectivity Source: https://github.com/chmc/listall/tree/main/.claude/skills/watch-connectivity Command: npx skills add https://github.com/chmc/listall --skill watch-connectivity-chmc
WatchConnectivity patterns for iPhone–watch communication. Use when implementing or debugging iOS to watchOS data sync.
Initialize WCSession, activate the session, and implement a basic sendMessage or transferUserInfo flow to begin syncing data between iPhone and Apple Watch.
High-intent search queries and answers about installing and using this skill.
To establish iPhone to watchOS data sync, initialize WCSession, activate the session, and implement a basic sendMessage or transferUserInfo flow to begin syncing data between devices.
For guaranteed-delivery data transfer when offline, use WatchConnectivity patterns like transferUserInfo. This ensures state updates are reliably delivered once the watch reconnects.
Real-time messaging using sendMessage fails when the watch is not reachable. You must check reachability and activation states before attempting real-time communication.
WatchConnectivity handles state synchronization during app lifecycle events by coordinating context updates and validating boundaries, ensuring robust data sync when apps activate or background.
Common anti-patterns in iOS to watchOS communication include ignoring reachability checks, failing to validate session activation, and using real-time messaging for offline guaranteed-delivery state updates.
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