In very early stages (like too early to know what's going on or why I'm taking certain approaches). However, I have built a couple libraries I leverage. There is a Tor embedder/controller [0] (with a project assisting with statically linked Tor [1]) and there is a Go wrapper for locally encrypted Sqlite [2] (which I need to update). That Tor controller even has a gRPC example that shows the basic idea of starting an onion service and communicating over Tor.
Thanks for the links. I will check it out. Recently I created a hidden service using whonix but didn't get a chance to build the site itself. actually created a couple different types so I have a little, very little, experience in the creation and utilization of H.S. but I look forward to looking at your idea and work. The concept is something that has a lot of positive possibilities.
0 - https://github.com/cretz/bine
1 - https://github.com/cretz/tor-static
2 - https://github.com/cretz/go-sqleet