LangGraph

What it is

LangGraph is a framework for building stateful, multi-step AI applications as graphs. It's designed for complex agent workflows where the execution path isn't linear—with loops, conditionals, and parallel paths. LangGraph extends LangChain for more sophisticated agent patterns.

Why it matters

LangGraph addresses limitations of simpler chain-based approaches. For agents that need complex control flow, state management, and human-in-the-loop patterns, LangGraph provides structure. It's becoming popular for production agent systems.