Factory

Run `npx skills add hmlongco/Factory --all -g -y` in your terminal to install all skills in this suite globally.

Factory is a lightweight, compile-time safe dependency injection library for Swift and SwiftUI. It lets you register and resolve services through containers with a single line of code.

Register a mock closure on the container's factory, such as `Container.shared.myService.register { MockService() }`. The FactoryTesting trait gives each Swift Testing test an isolated container automatically.

Yes. Factory provides `@InjectedObject` for ObservableObject view models and `@InjectedObservable` for iOS 17+ @Observable types, plus preview modifiers for swapping in mocks.

Factory needs no code generation, build phases, or upfront type registration. Each dependency is a computed property on a container, so missing registrations fail at compile time instead of runtime.