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 狀態管理模式。在設計工作流狀態模式、使用 TypedDict 與 Pydantic、使用帶註釋的運算符實現累積狀態或管理跨節點的共享狀態時使用。 來源：yonatangross/orchestkit。

查看原文