It is hard to track the @buf package versions. If not the IDE import substitutions, I would never learn the path from which I should import common things like Metadata, Address, BalancesResponse, etc.

It would be way easier to have only one entry point for such interfaces and @penumbra-zone/protobuf package is the great fit for it. We could improve two things at once:

1. Bundle the specific version of the @buf/... into a specific version of @penumbra-zone/protobuf. There won't be a need to separately install @buf packages by consumers and no more need to configure the @buf registry
2. Make the imports straightforward and only from one place

I don't have the exact solution on how to structure the protobuf package. One option is to put the interfaces next to the services it is used within. For example, Metadata is used in the ViewService, so it could be placed in @penumbra-zone/protobuf/view-service