What is clean architecture?

Clean architecture is an approach to software design that separates the system into layers with clear dependencies directed inward. The main idea is to separate business logic from implementation details such as databases, UI, or external services.

Key principles:

• Outer layers depend on inner layers, but not vice versa.
• Business rules (domain) are at the center and do not depend on infrastructure.
• Interfaces and abstractions allow changing implementation details without affecting business logic.

In Go, this is often implemented through packages where the domain is described by interfaces and structures, and specific implementations (repositories, services) are located in outer layers and injected through dependencies.

This approach increases testability, maintainability, and flexibility of the code.