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-Zustandsverwaltungsmuster. Verwenden Sie diese Option beim Entwerfen von Workflow-Statusschemata, bei der Verwendung von TypedDict vs. Pydantic, beim Implementieren der Statusakkumulation mit Annotated-Operatoren oder beim Verwalten des gemeinsamen Status über Knoten hinweg. Quelle: yonatangross/skillforge-claude-plugin.

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