Variable MessagesZodMetaConst

Prebuilt schema meta for Zod state definition.

Example

import { z } from "zod/v4-mini";
import { MessagesZodState, StateGraph } from "@langchain/langgraph";

const AgentState = z.object({
  messages: z.custom<BaseMessage[]>().register(registry, MessagesZodMeta),
});
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