[#add-metadata-and-tags-to-traces](https://docs.smith.langchain.com/how_to_guides/tracing/trace_with_langchain/#add-metadata-and-tags-to-traces): LLM should read this page when tracing LangChain applications with LangSmith, configuring tracing options for LangChain, or integrating LangChain with LangSmith. Provides instructions for logging traces from LangChain in Python and JS/TS, customizing trace metadata and configurations, interoperability between LangChain and LangSmith SDK, and distributed tracing with LangChain.

