architecture-patterns

Clean Architecture organizes code into concentric dependency layers, while Hexagonal Architecture isolates business logic using ports and adapters. This Skill explains both patterns and provides Python examples to help you choose the right structure for your backend.

You implement DDD aggregates and value objects by defining pure Python classes that encapsulate business rules without framework dependencies. This Skill provides practical Python code examples for creating these domain entities and repositories.

You should use Hexagonal Architecture when you need to isolate core business logic from external interfaces like databases or APIs. This Skill provides a decision framework to determine if Ports and Adapters suits your project's maintainability and testing needs.

Structure backend use cases by defining application-specific ports and injecting adapter implementations at runtime. This Skill demonstrates how to wire use cases, repositories, and dependency injection to build maintainable, testable systems.

Domain-Driven Design is not strictly necessary but highly beneficial for complex backend systems. This Skill outlines how DDD concepts like aggregates and entities enhance testability and maintainability, helping you decide if it fits your project scope.