Langgraph JS Sdk

Product Help LangGraph
1

1. Limited Submit Options in useStream Hook

The current useStream hook from @langchain/langgraph-sdk/react only supports basic submit options:

// Current limited options supported by useStream

stream.submit(
  { messages: [...toolMessages, newHumanMessage], context },
  {
    streamMode: ["values"],
    onDisconnect: "continue",
    multitaskStrategy: "reject",
    optimisticValues: (prev) => ({ /* optimistic update logic */ }),
  },
);

2. Missing Webhook Support

The useStream hook’s submit function does not support advanced options like:

  • webhook - for external notifications

  • streamResumable - for resumable streams

  • checkpointDuring - for checkpoint management

  • metadata - for custom metadata