# Package Responsibility and Forbidden Dependencies

| Package       | Responsibility                                          | Forbidden Dependencies        |
|---------------|-------------------------------------------------------|-------------------------------|
| Controller    | Handles incoming requests and responses                | Service -> Repository         |
| Service       | Contains business logic and service level operations   | Repository -> Service         |
| Repository    | Manages data persistence and retrieval                  | Controller -> Repository      |
| Domain        | Defines domain model and logic                          | Not applicable                |
| Integration    | Interfaces with external services                        | Service -> Integration        |