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.

Patrones de gestión del estado de LangGraph. Úselo al diseñar esquemas de estado de flujo de trabajo, usando TypedDict vs Pydantic, implementando estado de acumulación con operadores anotados o administrando estado compartido entre nodos. Fuente: yonatangross/orchestkit.

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