Go Hexagonal Architecture

To structure a Go project using hexagonal architecture, you separate code into strict domain, service, and storage boundaries. This opinionated layout uses a ports-and-adapters pattern with dedicated interface layers for CLI, TUI, and Web interactions.

The best way to separate domain logic from infrastructure in Go is using a hexagonal architecture. This approach defines zero-dependency domain entities for pure logic testing and introduces translation layers between domain models and persistence.

Yes, you can refactor an existing Go monolith into a ports-and-adapters layout. The hexagonal architecture blueprint applies to both new service development and refactoring existing codebases that require a clean separation of concerns.

Translation between domain models and persistence in Go is handled via dedicated translation layers within the storage boundaries. This ensures the domain remains zero-dependency while allowing infrastructure adapters to manage persistence mapping.

You need a hexagonal architecture blueprint for your Go service when you require a maintainable, testable, and evolvable codebase. It is particularly useful for new services, refactoring monoliths, or teaching teams a scalable architecture pattern.

Yes, this hexagonal architecture approach supports both CLI and Web interfaces in Go. It defines dedicated interface layers for CLI, TUI, and Web, allowing multiple entry points to interact with the same isolated domain and service layers.