go-clean-architecture

To refactor a Go service into clean architecture, you restructure code into Domain, Usecase, Repository, and Delivery layers with inward-only dependencies, ensuring business logic remains testable without a running server or database.

The repository pattern in Go isolates database dependencies by defining interfaces in the domain or usecase layer and implementing them in the repository layer, keeping SQL, pgx, or GORM confined to infrastructure boundaries.

Make Go business logic testable without a running HTTP server by moving framework code to the delivery layer and enforcing dependency inversion, allowing usecases to execute independently of Gin, Echo, or net/http.

Yes, this clean architecture approach works with existing Go web frameworks by confining Gin, Echo, Fiber, and net/http to the delivery layer, ensuring your business logic stays framework-agnostic and fully decoupled.

Use dependency inversion when untangling a Go monolith to enforce inward-only dependencies, preventing business logic from directly importing infrastructure packages and making the codebase easier to split and maintain.

The best way to wire dependencies in a Go clean architecture main.go file is through explicit, framework-free wiring, where interfaces are owned by inner layers and concrete implementations are injected at the application entry point.