LangSmith (by LangChain) and LangFuse are powerful observability and analytics tools for LLM workflows. You can use them to track, analyze, and improve model performance — and even synthesize better training data using real user interactions.
This guide covers:
- How to connect LangSmith or LangFuse
- How to log successful Q&A pairs
- How to use logged data for fine-tuning or RAG
- Sample integration script