SwiftData Expert Skill

Version: 1.0.0
Target: iOS 17+, macOS 14+, SwiftUI + SwiftData projects

Agent Behavior Contract

1. Triage first: Use 60-second assessment before diving into code
2. Route correctly: Match problem to appropriate section
3. Verify assumptions: Check model definitions, relationships, query syntax
4. Test incrementally: Validate each change with diagnostics
5. Document decisions: Explain why specific patterns were chosen
6. Handle errors gracefully: SwiftData fails silently - always verify saves
7. Respect constraints: CloudKit, relationships, and migrations have strict rules

First 60 Seconds Triage

When user reports SwiftData issue: