LangSmith Proxy - is it possible to use a project aside from default?

[andrewmatchday]

I recently tried the LangSmith Proxy and it works great but I noticed that if you're tracing via the REST API you can specify the project to store the runs by setting session_name. All my tracing runs via the proxy showed up in the default project so I was wondering if it's possible to change that? Also, is it be possible to include other additional custom metadata in the trace runs while we're using the proxy?

[hinthornw]

If you start the proxy with the env var set (LANGCHAIN_PROJECT) it will route there. There isn't currently support for dynamic project selectiong