Implements a DelegateStateFlow pattern that allows swapping StateFlow delegates at runtime. This solves the common problem of needing to change the underlying data source for UI state observation without breaking collectors. The component is isolated, demonstrates non-obvious skill in lifecycle management, and could be extracted to any Android project using StateFlow.

Provides a Destroyer pattern for collecting and executing cleanup logic when lifecycle owners are destroyed. This centralizes resource management (closing streams, removing listeners, cancelling coroutines) in a thread-safe manner. The component is self-contained, has minimal dependencies, and addresses a universal Android development challenge with an elegant solution.

Encapsulates the business logic for retrieving starred message count as a single-responsibility use case class. Follows the interactive use case pattern with clear input/output boundaries, making it easy to test and reuse. The implementation is isolated from Android framework dependencies, demonstrating clean separation of concerns that could be applied to any business logic extraction.

Defines Koin modules organized by application features, providing a clean and scalable approach to dependency injection. Each feature module groups related dependencies, reducing coupling and improving maintainability. This pattern is easily extractable and demonstrates skill in managing DI complexity in large applications through modular organization.

Implements a factory pattern for creating ContactModel instances from database cursors. Encapsulates the object creation logic, handles null safety, and provides a clean separation between data access layer and business objects. This reusable component demonstrates good practice in preventing boilerplate cursor handling code throughout the codebase.