Clean Architecture in Go & TypeScript

Hexagonal Boundaries

In production services, domain entities must remain strictly isolated from database drivers, HTTP routers, and third-party SDKs.

• Domain Layer: Pure business entities, state invariants, validation rules.
• Application Layer (Use Cases): Coordinates domain flows, defines outbound ports (interfaces).
• Infrastructure Layer (Adapters): PostgreSQL adapters, Kafka consumers, Stripe client implementations.

type ArticleRepository interface {
    GetByID(ctx context.Context, id int64) (*Article, error)
    Save(ctx context.Context, article *Article) error
}