The only contract provided by this assembly is the IAdapter interface. This is the interface that the adapter service implementation interacts with. As such, the SDK does not have any other external dependencies, since it's the adapter service that consumes this interface. The client-facing code does not need to know about adapters either. ======= Example ======= public class ProjectToMsBuildAdapter : IAdapter<IProject, IMSBuildProject> { // Implement actual conversion. }