Tracing

LangChain now supports native tracing, allowing users to visualize, step through, and debug chains and agents more effectively. Tracing helps in troubleshooting and debugging complex chains and agents by providing clear inputs and outputs of each involved primitive in the order they were invoked. The feature is currently available for local use via docker-compose and a hosted version for a limited group of users. Future updates may include UI improvements, better filtering and grouping of traces, and logging full serialized LLM chains for each run.