I would have suggested ProtoBuf too. That said, there was a comment in their post about not wanting to tightly couple the Go and Rust since they weren't sure t

I would have suggested ProtoBuf too. That said, there was a comment in their post about not wanting to tightly couple the Go and Rust since they weren't sure they could accurately represent their structures in both langs. I don't know anything about this turbo tool, but it seems relatively low-throughput, and they intend to migrate it all to Rust anyway, so it's probably not a big deal. That said; I'd have done this with binary comms and not JSON, ProtoBuf or not.