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Complete reference for typography on Apple platforms including San Francisco font system, text styles, Dynamic Type, tracking, leading, and internationalization through iOS 26.

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

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Comprehensive guide to SwiftUI's animation system, from foundational concepts to advanced techniques. This skill covers the Animatable protocol, the iOS 26 @Animatable macro, animation types, and the Transaction system.

iOS provides bit-perfect output by default to USB DACs — no resampling occurs. The DAC receives the source sample rate directly.

Command-line interface for Instruments profiling. Enables headless performance analysis without GUI.

Complete reference for converting OpenGL/DirectX code to Metal.

Complete API reference for SpriteKit organized by category.

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SwiftUI search is environment-based and navigation-consumed. You attach .searchable() to a view, but a navigation container (NavigationStack, NavigationSplitView, or TabView) renders the actual search field. This indirection is the source of most search bugs.