macOS Swift Desktop

Build native macOS desktop apps in Swift. This skill is topic-organized: SKILL.md is the index and routing table; detailed patterns and code live in references/.

When to use this skill

• Building or modifying a macOS .app bundle (AppKit, SwiftUI, or hybrid)
• Document-based apps (NSDocument, FileDocument)
• Menu bar apps (NSStatusItem)
• Preferences windows, toolbars, split views, inspectors
• Persistence (Core Data, SwiftData, GRDB/SQLite, UserDefaults, Keychain)
• Undo/redo, drag-and-drop, pasteboard, keyboard shortcuts, accessibility
• Sandboxing, entitlements, code signing, notarization, Sparkle auto-updates
• XPC helpers, SMAppService, Shortcuts/Intents, FileProvider, Handoff
• XCTest, XCUIApplication, OSLog, Instruments, crash reporting
• GPU-accelerated rendering with Metal, infinite canvases, libghostty, WKWebView embedding

If the task is pure Swift language questions from a TypeScript/Python background, read references/swift-for-ts-devs.md.