axiom▌

Core principle: Choose the right sync technology for the data shape, then implement offline-first patterns that handle network failures gracefully.

Comprehensive guide to App Intents framework for exposing app functionality to Siri, Apple Intelligence, Shortcuts, Spotlight, and other system experiences. Replaces older SiriKit custom intents with modern Swift-first API.

StoreKit 2 is Apple's modern in-app purchase framework with async/await APIs, automatic receipt validation, and SwiftUI integration. This reference covers every API, iOS 18.4 enhancements, and comprehensive WWDC 2025 code examples.

Advanced query patterns and schema composition techniques for SQLiteData by Point-Free. Built on GRDB and StructuredQueries.

SwiftData (Before)

Use when:

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.

Central coordinator for capture data flow.

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.

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.