Hi,
I had to draw a UML-diagram visualizing protobuf architecture defined in a number of .proto files in our project. I knew that current architecture is a subject of change, so, I wasn't much motivated to annoy myself with UML-drawings once again and I wrote a tool that does this job for me:
I would be happy if someone will find it useful too and even more happy for pull requests from you ;)
kind regards,
Valery