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LangGraph · Concept

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LangGraph models agent workflows as graphs. State stores data, nodes do work, and edges choose what runs next.

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Syntax

StateGraph(state_schema, input_schema=None, output_schema=None)
compiled_graph = builder.compile(...)

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  • StateGraph
  • START
  • END
  • Reducers
  • Checkpointers
  • Functional API
  • Pregel

Source: Graph API overview - Docs by LangChain. Checked 2026-11-03.