Discuss architecture patterns like Clean Architecture in Flutter.

Clean Architecture separates the app into independent layers: Presentation, Domain, and Data, promoting testability and decoupled logic.

Data Layer (APIs, Local DBs, Models). Domain Layer (Entities, Use Cases/Interactors, Repository Interfaces). Presentation Layer (UI, State Management like BLoC). The Domain layer has zero dependencies on external frameworks. The Data layer implements the Domain's repository interfaces (Dependency Inversion).