I just wrote a basic one https://github.com/moshe/asonic

That looks great, thank you! I'll try it out and send you any feedback I have. Also, you might want to link to Sonic in the README, for people unfamiliar with it.

Thanks, feedback is appreciated. I've added a link back to Sonic

The protocol description makes it look fairly trivial to script,

https://github.com/valeriansaliou/sonic/blob/master/PROTOCOL...

Wanna build it with me?

The Rust Python bindings are actually pretty good, I hacked together a project to let you deploy Rust micro services in Lambda via Python module bindings a while back.

Normally I would, but I don't have an immediate use for this, which kills my motivation

a grpc endpoint would be nice