LangChain Observability: Complete Tracing Setup (and What It Really Costs)
Short answer. For a LangChain or LangGraph app, turning on LangSmith tracing takes two environment variables and no code changes. The setup is the easy 10%. The other 90% is deciding what to capture, how long to keep it, what leaves your servers, and what the invoice will look like. Here is the part most … Read more