How do you implement Clean/Hexagonal Architecture in Go?

Updated Apr 28, 2026

Short answer

Clean Architecture isolates the core domain logic from external dependencies (DBs, APIs) using interfaces and dependency inversion.

Entities: Core business objects. 2. Use Cases: Business logic. 3. Interfaces/Adapters: Controllers, Gateways. 4. Infrastructure: DB, HTTP framework. The inner layers define interfaces (e.g., UserRepository), and the outer layers implement them. This makes the domain fully unit-testable without mocking databases.

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