Interface SchemaMeta<TValue, TUpdate>

interface SchemaMeta<TValue = any, TUpdate = TValue> {
    default?: () => TValue;
    jsonSchemaExtra?: {
        langgraph_nodes?: string[];
        langgraph_type?: "messages" | "prompt";
        [key: string]: unknown;
    };
    reducer?: {
        fn: (a: TValue, b: TUpdate) => TValue;
        schema?: InteropZodType<TUpdate>;
    };
}