Langsmith + streaming?

[jstjoe]

Hi I'm new. I'm using Langchain JS with streaming enabled and am struggling to log any runs / traces to Langsmith.

I've configured the enviornment variables and the client. I've tried manually setting the env varibles in code by creating a LangChainTracer callback and passing that into my chain.stream() call like chain.stream({ input: messages, callbacks }) where callbacks is an array containing the LangChainTracer.

Help?? I can't find anything in the docs which says I need to do something special for streaming but I suspect that's the issue? Is streaming not supported?

[hinthornw]

Callbacks goes within the config (second argument) rather than the input (first argument) - does that resolve your issue?

[jstjoe]

🤦 yes, thank you!