We have an application that always return an AppContentResponse<T>. AppContentResponse contains some properties that are present in every response of every method we have, while the T is the actually Type of the response.

When we look at the metadata documentation, ServiceStack generates the documentation for AppContentResponse<T> without also documenting T. The strange thing is that if I create a class that actually implements AppContentResponse<TypeOfThatResponse>, both types get automatically documented.

I filed an issue at https://forums.servicestack.net/t/expand-generic-type-when-documenting-responses/5676 if you are looking for more details.