clean-architecture-flutter

Structure a Flutter app with clean architecture by dividing features into presentation, domain, and data layers. This enforces strict directional dependencies, keeping domain logic pure Dart while presentation and data layers handle UI and repository contracts.

Introduce use cases and repositories in Flutter when you need to separate business logic from data fetching. Define repository interfaces in the domain layer and implement them in the data layer to maintain clear boundaries and improve testability.

Map DTOs to domain models in Flutter clean architecture using dedicated mappers within the data layer. This ensures API or DAO integration data is converted into pure domain models before crossing the boundary into the domain layer.

Flutter clean architecture requires the domain layer to remain pure Dart. By keeping the domain layer free from presentation and data dependencies, you ensure that business logic stays testable and independent of Flutter UI or external data sources.

Organize Flutter feature folders by creating subdirectories for di, data, domain, and presentation modules. This guided feature layout ensures consistent code organization across your project, separating dependency injection, data sources, business logic, and UI.

Flutter app architecture breaks down as projects scale due to inconsistent layer separation. Applying a strict three-layer structure with clear rules for where code belongs prevents tangled dependencies and improves long-term maintainability.