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JavaScript@langchain/langgraph-sdkreactSubagentManageraddMessageToSubagent
Method●Since v1.6

addMessageToSubagent

Add a serialized message to a subagent from stream events.

This method handles the raw serialized message data from SSE events. Uses MessageTupleManager for proper chunk concatenation, matching how the main stream handles messages.

Copy
addMessageToSubagent(
  namespaceId: string,
  serialized: Message<DefaultToolCall>,
  metadata: Record<string, unknown>
)

Parameters

NameTypeDescription
namespaceId*string

The namespace ID (pregel task ID) from the stream

serialized*Message<DefaultToolCall>

The serialized message from the stream

metadataRecord<string, unknown>

Optional metadata from the stream event

View source on GitHub