Apple Developer Skills

A curated collection of Claude Code Agent Skills distilled from Apple's official developer documentation, focused on building modern Apple-platform apps with Swift and SwiftUI.

Each skill is a self-contained SKILL.md that Claude can load on demand to write idiomatic, up-to-date code (Swift 6 concurrency, the Observation framework, SwiftData, async URLSession, and more).

Status

Platform	Status
iOS	✅ Available
Cross-platform (Swift, Foundation, SwiftData, networking)	✅ Available
macOS	🚧 Planned
watchOS	🚧 Planned

This first release targets modern iOS core development. macOS and watchOS skill sets are on the roadmap. The skills/shared/ skills already apply to every Apple platform, so adding macOS/watchOS only requires new platform-specific folders — the shared foundations are reused, not duplicated.

Repository layout

apple-developer-skills/
├── skills/
│   ├── apple-dev-router/           # Router: maps a task to the right specialized skill(s)
│   ├── shared/                     # Cross-platform Apple frameworks (iOS, macOS, watchOS, tvOS)
│   │   ├── swift-concurrency/
│   │   ├── foundation-essentials/
│   │   ├── networking-urlsession/
│   │   ├── swiftdata-persistence/
│   │   └── observation-framework/
│   └── ios/                        # iOS app development
│       ├── swiftui-fundamentals/
│       ├── swiftui-state-and-data-flow/
│       ├── ios-app-architecture/
│       ├── combine-essentials/
│       ├── app-store-review/        # App Store guideline compliance review (code/config level)
│       └── apple-hig-review/        # Human Interface Guidelines UI review (code level)
├── LICENSE
└── README.md

Every leaf folder contains a SKILL.md with YAML frontmatter (name, description) and a progressive-disclosure body.

Skills

Router (skills/apple-dev-router/)

Skill	What it covers
apple-dev-router	Entry point for broad/ambiguous Apple-dev tasks. Maps the task to the right specialized skill(s) so only the relevant ones load. Documents how skill loading works (progressive disclosure — descriptions are always in context, bodies load only on invocation, no duplicate loading).

On "auto-loading" skills: Claude Code already loads skills on demand — each skill's description is the trigger, the body loads only when invoked, and an already-loaded skill is never reloaded. You don't need a skill to load other skills (it can't anyway). apple-dev-router instead acts as a router/index for broad requests, pointing Claude at the right specialized skill(s) for the current step.

Cross-platform (skills/shared/)

Skill	What it covers
swift-concurrency	async/await, Task, TaskGroup, actors, @MainActor, Sendable, AsyncSequence/AsyncStream, Swift 6 data-race safety
foundation-essentials	Codable, JSONEncoder/JSONDecoder, dates & FormatStyle, FileManager, URL, Measurement, UserDefaults
networking-urlsession	async URLSession, URLRequest, status/error handling, uploads/downloads, decoding into Codable models
swiftdata-persistence	@Model, @Query, ModelContainer, ModelContext, #Predicate, relationships, migrations
observation-framework	@Observable, observation tracking, migrating off ObservableObject/@Published, SwiftUI integration

iOS (skills/ios/)

Skill	What it covers
swiftui-fundamentals	Views, layout (stacks/grids/Layout), modifiers, lists, NavigationStack, controls, animations, Liquid Glass. Building UI — for auditing it, see apple-hig-review
swiftui-state-and-data-flow	@State, @Binding, @Environment, @Bindable, passing data, single source of truth
ios-app-architecture	App/Scene lifecycle, @main, MVVM with @Observable, dependency injection, .task/lifecycle hooks, App Intents
combine-essentials	Publishers, subscribers, operators, @Published, when to use Combine vs. async/await
app-store-review	Pre-submission App Store Review Guideline compliance detectable in code/config: Info.plist usage strings, UIBackgroundModes, private/deprecated API, account deletion, ATT, PrivacyInfo.xcprivacy, export compliance. Ships with guidelines-full.txt
apple-hig-review	Human Interface Guidelines UI audit in code: Dynamic Type, semantic colors/Dark Mode, SF Symbols, 44pt hit targets, navigation/components, feedback/empty states, accessibility, i18n. Severity-graded review checklist

Installation

Skills live in ~/.claude/skills/ (user scope) or <project>/.claude/skills/ (project scope). Copy the skill folders you want:

git clone https://github.com/Spacebody/apple-developer-skills.git
cd apple-developer-skills

# Install every skill at the user level
mkdir -p ~/.claude/skills
cp -R skills/apple-dev-router skills/shared/* skills/ios/* ~/.claude/skills/

# …or install a single skill
cp -R skills/shared/swift-concurrency ~/.claude/skills/

Claude automatically discovers any SKILL.md under those directories and loads it when a task matches its description. You can also invoke one explicitly, e.g. Use the swift-concurrency skill to refactor this code.

Contributing

Contributions that extend coverage (macOS, watchOS, tvOS, additional frameworks) or keep existing skills current with the latest Apple releases are welcome. Please keep each SKILL.md:

• Accurate — grounded in the official Apple documentation.
• Concise — load only what's needed; push deep detail into reference files.
• Idiomatic — modern Swift (Swift 6, async/await, Observation, SwiftData) over legacy patterns.

License

MIT. Skill content is original prose distilled from publicly available Apple documentation; "Apple", "iOS", "macOS", "watchOS", "Swift", and "SwiftUI" are trademarks of Apple Inc. This project is not affiliated with or endorsed by Apple Inc.