Optimize Apple App Store metadata in store.config.json for ASO (App Store Optimization). Use when working with store.config.json, App Store keywords, titles, subtitles, descriptions, or localizing app metadata. Helps maximize app visibility and downloads.
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Index of Apple developer documentation for iOS, macOS, and related frameworks. Use when looking up what APIs exist in a framework, browsing available documentation, or deciding what docs to fetch. Covers SwiftUI, UIKit, Core Animation (QuartzCore), XCTest, HealthKit, Combine, SwiftData, and more.
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API reference: BackgroundTasks. Query for BGTaskScheduler, app refresh, background processing.
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Scaffold, build, and package SwiftPM-based macOS apps without an Xcode project. Use when you need a from-scratch macOS app layout, SwiftPM targets/resources, a custom .app bundle assembly script, or signing/notarization/appcast steps outside Xcode.
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Swift Charts patterns — marks, axes, selection, styling, composition, Chart3D, accessibility, and Audio Graph. Use when building or improving charts in SwiftUI.
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Audit and improve SwiftUI runtime performance from code review and architecture. Use for requests to diagnose slow rendering, janky scrolling, high CPU/memory usage, excessive view updates, or layout thrash in SwiftUI apps, and to provide guidance for user-run Instruments profiling when code review alone is insufficient.
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API reference: HealthKit. Query for HKHealthStore, HKQuantitySample, workouts, health data read/write.
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API reference: MapKit for SwiftUI. Map view, Marker, Annotation, camera positions, map features.
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API reference: PhotosUI. Query for PhotosPicker, PHLivePhotoView, photo selection.
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API reference: StoreKit 2. Product, Transaction, subscriptions, StoreView, SubscriptionStoreView.
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API reference: SwiftData. Query for @Model, ModelContext, @Query, schema migrations.
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API reference: SwiftUI. Query for views, layouts, navigation, @State/@Binding/@Observable, view modifiers, NavigationStack, iOS 26+ features.
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API reference: TipKit. Tip protocol, TipView, PopoverTipView, Tips.configure, inline and popover tips.
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API reference: UserNotifications. Query for local/remote notifications, triggers, notification content.
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API reference: XCUITest. Query for element queries, waiting patterns, Swift 6 @MainActor, assertions, screenshots, launch arguments.
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SwiftUI animation patterns — implicit/explicit animations, transitions, phase/keyframe animations, the Animatable protocol, and the @Animatable macro. Use when implementing animations, transitions, or motion in SwiftUI views.
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Best practices and example-driven guidance for building SwiftUI views and components, including navigation hierarchies, custom view modifiers, and responsive layouts with stacks and grids. Use when creating or refactoring SwiftUI UI, designing tab architecture with TabView, composing screens with VStack/HStack, managing @State or @Binding, building declarative iOS interfaces, or needing component-specific patterns and examples.
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API reference: Combine. Query for publishers, subscribers, operators, async data streams.
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API reference: Core Animation (QuartzCore). Query for CALayer, CAAnimation, CABasicAnimation, CAKeyframeAnimation, CASpringAnimation, CATransaction, CAShapeLayer, CAGradientLayer, CAEmitterLayer, CATransform3D, CADisplayLink.
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API reference: Core Haptics. Query for CHHapticEngine, haptic patterns, tactile feedback.
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API reference: EventKit. Query for EKEventStore, EKEvent, EKReminder, calendar access.
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Swift concurrency patterns — actors, structured concurrency, cancellation, async streams, GCD migration, strict-concurrency diagnostics, common bug patterns. Use when writing, reviewing, or debugging concurrent Swift code.
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Swift Testing patterns — structs over classes, async confirmations, parameterized tests, exit tests, attachments, common agent mistakes. Use when writing, reviewing, or migrating Swift Testing code.
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Fact lookup: Apple Human Interface Guidelines corpus (greppable markdown). Query on demand for accessibility and ergonomic minimums (hit-target sizes, Dynamic Type), platform terminology, system component capabilities, and App-Review-relevant conventions. Not design direction.
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