nw-fp-hexagonal-architecture

Hexagonal architecture separates pure core logic from side effects by organizing functional codebases into a pure domain core and a thin side-effect shell, enforcing clear boundaries for isolated side effects and testable logic.

Ports and adapters define explicit boundaries for dependency injection in functional apps, allowing you to swap infrastructure implementations easily while keeping the core domain logic pure and independent of external I/O.

Yes, hexagonal architecture applies across domains such as web services, CLIs, batch job pipelines, and data processing tasks by separating the pure core from side-effectful exit points for adaptable integrations.

Hexagonal architecture improves testability by isolating pure domain logic from side-effectful exit points through explicit ports and adapters, allowing teams to test core business rules without invoking external dependencies or infrastructure.

Hexagonal architecture introduces explicit ports, adapters, and boundary layers, which may add unnecessary structural overhead to small functional scripts or simple data pipelines that do not require easily swappable infrastructure or heavily isolated side effects.