langgraph-state

SKILL.md

Note: MessageGraph is deprecated in LangGraph v1.0.0. Use StateGraph with a messages key instead.

| TypedDict vs Pydantic | TypedDict for internal state, Pydantic at boundaries | | Messages state | Use MessagesState or addmessages reducer | | Accumulators | Always use Annotated[list, add] for multi-agent | | Nesting | Keep state flat (easier debugging) | | Immutability | Return new state, don't mutate |

2026 Guidance: Use TypedDict inside the graph (lightweight, no runtime overhead). Use Pydantic at boundaries (inputs/outputs, user-facing data) for validation.

LangGraph 상태 관리 패턴. TypedDict와 Pydantic을 사용하여 워크플로 상태 스키마를 설계하거나 Annotated 연산자로 상태 누적을 구현하거나 노드 간 공유 상태를 관리할 때 사용합니다. 출처: yonatangross/orchestkit.

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