LangGraph

LangGraph is LangChain's agent runtime and low-level orchestration framework for agents that have to handle complex tasks reliably. Instead of one prebuilt loop it gives low-level primitives for building your own control flow — single agent, multi-agent or hierarchical — inside one framework. Built-in memory keeps conversation history and carries context between interactions, and human-in-the-loop checks let a person steer, moderate or approve what the agent does.