# Package Responsibility and Forbidden Dependencies

| Package      | Responsibility                                   | Forbidden Dependencies |
|--------------|--------------------------------------------------|------------------------|
| controller   | Handles incoming requests and routes them        | repository, domain     |
| service      | Contains business logic and processes data       | repository, domain     |
| repository   | Data access and storage                          | controller, service    |
| domain       | Core business model and rules                    | controller, service     |
| integration   | External system communication                    | domain                 |