iOS Navigation (Modular MVVM-C)

Opinionated navigation enforcement for SwiftUI apps using the clinic modular architecture. Focus on coordinator + route shell wiring, feature isolation, and resilient push/sheet/deep-link flows.

Non-Negotiable Constraints (iOS 26 / Swift 6.2)

• @Equatable macro on every navigation view, AnyView never
• @Observable everywhere, ObservableObject / @Published never
• App-target coordinators own NavigationPath; route shells own .navigationDestination mappings
• Coordinator-owned modal state, inline @State booleans for sheets never
• Domain layer defines coordinator protocols; concrete coordinators stay out of feature modules

Clinic Architecture Contract (iOS 26 / Swift 6.2)

All guidance in this skill assumes the clinic modular MVVM-C architecture: