For the past several (months now!) I have been slowly working to open source a proxy we built for pi internally.
Its been super helpful for us, helping us centralise session logging, hook and model insights as people work on stuff. There is a bunch of other interesting things (such as runtime model evals) we now adding. If this would be of interest -- open source of course -- please drop me a note here, it will incentivise me to finally extricate it from our broader system:
Slopsite here: https://piproxy.latchlabs.dev