go-clean-architecture

Structure Go projects with clean architecture by placing domain models in internal/domain, services in internal/application, and wiring infrastructure adapters in main.go via dependency injection to enforce layer boundaries and testability.

Enforce dependency direction in Go clean architecture by ensuring the domain layer has zero external dependencies, keeping application use cases free of HTTP or DB code, and wiring infrastructure implementations into the app through dependency injection.

Dependency injection in Go layered architecture works by wiring infrastructure layer implementations like repositories and adapters into the application layer at runtime, enabling lightweight testing and incremental evolution without coupling use cases to concrete database code.

Apply domain-driven design to Go services by defining entities and domain interfaces in a dedicated domain layer, orchestrating use cases in an application layer, and isolating external interfaces in an infrastructure layer to enable clear boundaries and scalable maintainability.

Use clean architecture for Go applications when services require clear boundaries, testability, and scalable maintainability across domain, use-case, and infrastructure layers, especially for complex domain logic like user or account management systems.

Test Go use cases without a database by defining repository contracts in the domain layer, injecting mock infrastructure adapters during dependency injection, and ensuring the application layer depends only on domain interfaces rather than concrete DB implementations.