Use when working with SwiftData - @Model definitions, @Query in SwiftUI, @Relationship macros, ModelContext patterns, CloudKit integration, iOS 26+ features, and Swift 6 concurrency with @MainActor — Apple's native persistence framework
Complete guide for Apple's on-device Foundation Models framework (iOS 26+). Use when implementing, debugging, or architecting with Foundation Models. Triggers on: 'Foundation Models', 'LanguageModelSession', '@Generable', '@Guide', 'on-device LLM', 'FM framework'. Covers API reference, anti-patterns, decision trees, diagnostics, Instruments triage, and production crisis defense.
Use when fixing VoiceOver issues, Dynamic Type violations, color contrast failures, touch target problems, keyboard navigation gaps, or Reduce Motion support - comprehensive accessibility diagnostics with WCAG compliance, Accessibility Inspector workflows, and App Store Review preparation for iOS/macOS
Structured logging for Swift/macOS apps using the SBLogger pattern. Use when adding a new log category to a Swift service, writing log messages in Swift code, setting up logging infrastructure in a new Swift project, or reviewing log message format consistency. Triggers on: 'add logging', 'new log category', 'set up logging', 'log messages', 'SBLogger', 'Logger category'. Swift-specific — covers Sendable isolation, nonisolated let, MainActor, os.Logger, and stderr debug output.