swift-language-macos

What problem does it solve?

This Skill eliminates the frustration of applying modern Swift language features incorrectly to macOS development, avoiding common crashes, concurrency bugs, and AppKit interoperability issues that arise from outdated or generic Swift patterns.

Core Features & Use Cases

• Swift 6.3 Language Features: Implement macros, result builders, and new optimization attributes to reduce boilerplate and improve performance in macOS apps.
• Concurrency Safety: Build thread-safe state management with actors, Sendable conformance, and @unchecked Sendable for AppKit-bridged reference types.
• Objective-C/AppKit Interop: Correctly bridge Swift code to AppKit's Objective-C runtime for KVO, target-action, and delegate patterns without runtime errors. Use case: When building a multi-window macOS document editor, use this Skill to implement a thread-safe document model with @Observable for automatic UI updates, custom macros to generate view model boilerplate, and KVO-compliant properties for legacy AppKit integration.

Quick Start

Use the swift-language-macos skill to implement a thread-safe, KVO-compliant document model for your macOS app that supports automatic UI updates with @Observable.