LangSmith

Overview

LangSmith is the observability and evaluation platform for LLM applications. It traces every step of your chains and agents, helps you build evaluation datasets, run automated quality checks, and monitor production performance. Essential for moving LLM apps from prototype to production.

Instructions

Step 1: Setup and Configuration

Create a LangSmith account at smith.langchain.com and get an API key.

pip install langsmith

Set environment variables:

export LANGCHAIN_TRACING_V2=true