code-architecture

Clean Architecture layers dependencies strictly inward toward domain entities, while Hexagonal Architecture emphasizes ports and adapters to symmetrize infrastructure interactions. Both patterns isolate business logic to improve testability and maintainability for single-application projects.

Feature-based organization structures code by vertical business capabilities rather than technical layers. You define strict module boundaries around each feature, grouping its domain logic, UI, and infrastructure together to improve maintainability and scalability.

Use vertical slice architecture when you want to reduce artificial coupling between technical layers and simplify cross-cutting changes. It organizes code by feature slices rather than horizontal layers, avoiding the anti-pattern of unnecessary dependencies in maintainable code.

Ports and adapters define strict boundaries between application core logic and external infrastructure. By programming against port interfaces and injecting infrastructure adapters, you isolate side effects and enable independent unit testing of the domain.

Yes, this architecture guidance specifically targets single-application projects seeking scalable organization. It provides decision records and module boundary specifications to structure software patterns effectively for maintainable, long-term code evolution.