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This approach organizes code by business feature (e.g., authentication, shopping_cart) rather than by technical type (e.g., all screens together, all models together). Each feature is self-contained and follows a strict three-layer separation Presentation (UI/ViewModels), Domain (pure business logic/entities), and Data (APIs, databases, DTOs) connected by a unidirectional dependency rule where Presentation and Data both depend […]
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