I just want to be able to browse these protobufs, such as push-tag on an element in one .proto file taking me to where that element is defined in a different .proto file.
I was able to get to achieve this browsing capability by creating an (Other) project and adding my .proto files in there.
We already have the build scripts to generate from our proto definition into .cc/.h files, so I don't need SlickEdit to do that for me.
Using (other) project is working fine so far for my purpose for browsing only, but if there is a better way I'd like to know?