axiom▌

Comprehensive guide to implementing haptic feedback on iOS. Every Apple Design Award winner uses excellent haptic feedback - Camera, Maps, Weather all use haptics masterfully to create delightful, responsive experiences.

SwiftData schema migrations move your data safely when models change. Core principle SwiftData's willMigrate sees only OLD models, didMigrate sees only NEW models—you can never access both simultaneously. This limitation shapes all migration strategies.

Central coordinator for capture data flow.

Memory issues manifest as crashes after prolonged use. Core principle 90% of memory leaks follow 3 patterns (retain cycles, timer/observer leaks, collection growth). Diagnose systematically with Instruments, never guess.

Stacks, grids, outlines, and scroll enhancements. iOS 14 through iOS 26.

CAAnimation issues manifest as missing completion handlers, wrong timing, or jank under specific conditions. Core principle 90% of CAAnimation problems are CATransaction timing, layer state, or frame rate assumptions, not Core Animation bugs.

You MUST use this skill for ANY networking work including HTTP requests, WebSockets, TCP connections, or network debugging.

Wait for conditions, not arbitrary timeouts. Core principle Flaky tests come from guessing how long operations take. Condition-based waiting eliminates race conditions.

You MUST use this skill for ANY GPU rendering, graphics programming, 3D content display, or display performance work.

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