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Expert guidance for building watchOS apps with SwiftUI, WidgetKit complications, notifications, Siri/App Intents, HealthKit, and WatchKit runtime management. Use this skill whenever the user asks about Apple Watch development, watchOS features, complications, watch faces, Smart Stack, Always On, double-tap, Action button (Ultra), background sessions, Extended Runtime Sessions, independent watch apps, or watchOS-specific APIs. Trigger for ClockKit to WidgetKit migration, watchOS UI patterns, multiple watch sizes, and accessibility. Also use for SwiftUI questions in a watchOS context.

CarPlay framework for iOS in-car applications — audio, communication, navigation, parking, EV charging, quick food ordering, fueling, driving task, public safety, and voice-based conversational apps. Includes widgets, live activities, CarPlay Ultra, and instrument cluster support.

Guide for building CarPlay quick-ordering apps (food ordering, pickup, etc.) using the CarPlay framework. Use this skill whenever the user wants to build a CarPlay ordering app, integrate CarPlay templates for food/drink/pickup ordering, work with CPPointOfInterestTemplate, CPListTemplate, CPTabBarTemplate, or CPInterfaceController for ordering workflows. Also trigger when the user mentions CarPlay entitlements, Live Activities with CarPlay ordering, or push notification updates for order status. Covers the full lifecycle: entitlement setup, template hierarchy, map-based POI selection, order placement, Live Activity integration, and push token management.

Use this skill whenever the user wants to create, configure, implement, debug, or learn about Apple App Clips for iOS apps. Triggers include: any mention of 'App Clip', 'app clip', 'App Clip Code', 'invocation URL', 'App Clip experience', lightweight app, instant app experience, or demo version of an iOS app. Also use when the user asks about sharing data between an App Clip and a full app, configuring App Clip experiences in App Store Connect, App Clip size limits, responding to invocations, Smart App Banners for App Clips, NFC-integrated codes, or App Clip to full app transitions. Use this skill even if the user just mentions wanting a "lightweight version" or "instant experience" for their iOS app — they likely need an App Clip. Do NOT use for general iOS development unrelated to App Clips, Android Instant Apps, or Progressive Web Apps.

Reference skill for Apple's CoreLocation framework in Swift/SwiftUI. Use this skill whenever the user works with location services, GPS, geofencing, beacon ranging, geocoding, compass headings, or any CLLocationManager-related code on iOS, macOS, watchOS, or visionOS. Trigger on mentions of: CoreLocation, CLLocationManager, CLLocation, location permissions, geofencing, CLMonitor, iBeacon, CLGeocoder, reverse geocoding, background location updates, "When In Use" / "Always" authorization, CLLocationUpdate, live updates, significant location changes, or any location-related Info.plist keys like NSLocationWhenInUseUsageDescription.

Comprehensive reference for Apple's Tap to Pay on iPhone — the ProximityReader framework, PSP integration, entitlement workflow, marketing guidelines, and regional availability. Use this skill whenever the user asks about implementing contactless payments on iPhone, the ProximityReader API, Tap to Pay entitlements, NFC payment acceptance, loyalty card reading via NFC, payment service provider (PSP) selection for Tap to Pay, or merchant-facing payment app development. Also trigger when the user mentions "Tap to Pay", "TTP", "softPOS", "iPhone as terminal", "contactless payment acceptance", or building an app that accepts card-present payments on iPhone without external hardware.

Write, explain, and debug Metal GPU code including shaders (vertex, fragment, compute), render pipelines, compute pipelines, buffer/texture management, and Metal 4 APIs. Use this skill whenever the user mentions Metal, GPU programming, shaders, MSL (Metal Shading Language), render passes, compute kernels, MTLDevice, MTLCommandBuffer, MTLRenderPipelineState, or any Apple GPU/graphics programming topic. Also trigger when the user wants to do parallel computation on Apple devices, write GPU-accelerated code, or work with Metal Performance Shaders, MetalFX, MetalKit, or Compositor Services. Covers iOS, macOS, iPadOS, tvOS, and visionOS.

Guide users through creating, designing, signing, distributing, and updating Apple Wallet passes using the PassKit framework. Use this skill whenever the user mentions Wallet passes, .pkpass files, boarding passes, event tickets, store cards, coupons, loyalty cards, membership cards, NFC passes, or anything related to Apple Wallet integration. Also trigger when the user asks about "Add to Wallet" badges, pass signing certificates, pass updates via push notifications, or barcode/NFC-based redemption flows. Even if the user just says "I want to create a digital ticket" or "loyalty card for my app", this skill applies.

Comprehensive iOS development skill for Apple's ProximityReader framework. Covers Tap to Pay on iPhone (payment card reading), loyalty card (VAS) integration, Store and Forward mode, the Verifier API (mobile document / ID reading), and merchant discovery UI. Use this skill whenever the user mentions ProximityReader, Tap to Pay on iPhone, contactless payments on iPhone, NFC payment reading, loyalty card reading from Wallet, VAS requests, mobile driver's license verification, ID verification on iPhone, MobileDocumentReader, PaymentCardReader, PaymentCardReaderSession, or any related topic. Also trigger when the user wants to build a point-of-sale (POS) app, accept contactless payments without hardware, or read digital wallet passes on iPhone.

Use this skill when working with Apple's Foundation Models framework for on-device AI and LLM capabilities in iOS/macOS apps

Help developers integrate Apple MapKit into iOS/macOS apps. Use this skill when users ask to add a map to their app, display maps, show user location on a map, add markers/pins/annotations, implement map clustering, get directions/routing between locations, search for places/points of interest, implement MapKit features, work with MKMapView, SwiftUI Map, MKAnnotation, MKOverlay, MKDirections, MKLocalSearch, or any MapKit-related development task.

Integrate Siri voice interactions, Shortcuts, and intelligent suggestions into iOS/watchOS apps using Apple's SiriKit framework. Use when implementing Intents extensions, custom intents, Siri Shortcuts, voice phrase handling, intent resolution/confirmation/handling, IntentsUI for custom Siri interfaces, donating shortcuts, or App Intents migration. Covers system intent domains (messaging, payments, ride booking, workouts, media) and custom intent definition.

SwiftUI framework for building user interfaces

Build iOS/macOS/watchOS/visionOS widgets, Live Activities, watch complications, and controls using Apple's WidgetKit framework. Use when creating widget extensions, timeline providers, configurable widgets, Lock Screen widgets, Smart Stack widgets, Live Activities with ActivityKit, interactive widgets with buttons/toggles, or watch complications. Covers all widget families (systemSmall/Medium/Large/ExtraLarge, accessoryCircular/Rectangular/Inline/Corner) and rendering modes.