Did anyone ever make any progress on that protobuf-to-json-over-http stuff that was in flight a while ago?

I don't know if this is exactly what you're referring to, but support for a jsonprc transport (that works without needing http2) was merged into launcher a couple months back

That might be what I'm thinking of. When I did a fleet deployment a few months back we weren't able to use an AWS cert on our load balancer because of issues with the transport protocol and there was some talk about something being the solution for this.

Hey Dave, there is undocumented JSON RPC support in launcher right now, but Fleet does not support it