What problem does it solve? Developing native macOS apps typically requires constant Xcode GUI interaction, manual debugging, and guesswork around code signing, sandboxing, and App Store rules. This Skill provides a complete CLI-driven lifecycle for building professional SwiftUI and AppKit apps without opening Xcode, with verified outcomes at every step. ## Core Features & Use Cases - Full Lifecycle Workflows: Guided processes for building new apps, debugging crashes, adding features, writing tests, optimizing performance, and shipping with notarization. - CLI-Only Toolchain: Uses xcodebuild, xcodegen, xcsift, lldb, log stream, leaks, and xctrace so every build, test, and debug step runs from the terminal. - Deep Reference Library: Covers app architecture with @Observable, SwiftUI patterns, AppKit integration, app extensions, data persistence, and a catalog of common pitfalls like sandboxing violations and code signing failures. - Use Case: Ask to create a menu bar utility app, and the Skill scaffolds the project with XcodeGen, implements features with TDD, verifies builds and tests via xcodebuild, and prepares the signed, notarized release. ## Quick Start Ask the assistant to build a new macOS app, fix a bug in an existing Swift project, or prepare an app for App Store release, and it will route to the matching workflow.
