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LangChain · Type Alias

AgentState

AgentState is the default state shape for an agent. It stores message history and can include remaining execution steps or custom fields.

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Syntax

AgentState()

In-depth API docs are only for subscribers: parameters, examples, common mistakes and interview practice.

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  • create_agent
  • state_schema
  • ToolRuntime
  • InMemorySaver
  • messages
  • remaining_steps

Source: AgentState | langgraph.prebuilt. Checked 2026-11-03.