cloudkit▌

Sync data across devices using CloudKit, iCloud key-value storage, and iCloud Drive. Covers container setup, record CRUD, queries, subscriptions, CKSyncEngine, SwiftData integration, conflict resolution, and error handling. Targets iOS 26+ with Swift 6.2; older availability noted where relevant.

Purpose: Comprehensive CloudKit reference for database-based iCloud storage and sync Availability: iOS 10.0+ (basic), iOS 17.0+ (CKSyncEngine), iOS 17.0+ (SwiftData integration) Context: Modern CloudKit sync via CKSyncEngine (WWDC 2023) or SwiftData integration