CloudKit Reference

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

When to Use This Skill

Use this skill when:

• Implementing structured data sync to iCloud
• Choosing between SwiftData+CloudKit, CKSyncEngine, or raw CloudKit APIs
• Setting up public/private/shared databases
• Implementing conflict resolution
• Debugging CloudKit sync issues
• Monitoring CloudKit performance

NOT for: Simple file sync (use axiom-icloud-drive-ref instead)

Overview