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LangGraph is a library by LangChain for building stateful, multi-actor applications with LLMs. It models workflows as directed graphs with cycles, enabling complex agent architectures.

• Graph-based workflow definition with cycles
• Persistent state across conversation turns
• Human-in-the-loop checkpoints
• Streaming support for real-time applications

Used for building complex AI agents that need planning, reflection, and multi-step reasoning. Ideal for workflows where agents need to loop, retry, or branch.

Open-source (MIT license). LangGraph Platform for managed deployment.

Visit LangGraph official website →