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iCloud synchronization agent — syncs user data with Apple's cloud services

Manages bidirectional synchronization of user data between the local system and iCloud servers. Connects to Apple's cloud infrastructure via multiple network endpoints to upload and download changes. Accesses files across multiple directories on disk through granted storage exceptions, storing cached or synced data locally. Exposes an XPC service for other system components to coordinate sync operations and check status. Handles background sync operations to keep local content current with cloud state.AI