LangGraph

Definition

LangGraph is LangChain's library for orchestrating agents as a directed graph of nodes with shared state, instead of an opaque agent loop. Each node is a function or LLM call; edges decide the next step based on state. LangGraph is the preferred LangChain stack for production-grade agents because the graph topology is inspectable and testable.

When to use

See also

• LangChain — Python and JavaScript framework for building LLM applications — chains, agents, memory, retrieval, and tool use.
• agent — An LLM-driven program that plans, calls tools, observes results, and loops until it reaches a goal.