LangGraph — AI Glossary

LangGraph is an open-source Python library from the LangChain team for building stateful, multi-actor LLM applications as graphs. It defines an explicit state schema, nodes that read and write that state, edges that route based on state inspection, and built-in support for persistence (checkpointers), human-in-the-loop interruption, and streaming. LangGraph is used standalone or alongside LangChain.