How to only pass response from one agent to another without passing the whole Messages State in Multi-Agent systems?

[SaM-0777]

I have this graph image

Here I only want to pass the response generated by subject-agent to generate-agent.
Right now the whole State is being passed, This is causing high token usage

FYI
Subject-agent use tools to get relevant information and generate a subject to create an essay.
Generate-agent creates the whole essay from that subject.

How can I only pass the response generated by subject-agent to generate-agent without passing the whole state?

[hinthornw]

Does putting it in a node work?

async def generate_agent(state):
    return await my_sub_agent({**state, "messages": [state["messages"][-1]]})

[SaM-0777]

I am actually returning a Command

const subjectAgentToolsNode = new ToolNode(subjectAgentTools);
    const subjectModelWithTools = model.bindTools(subjectAgentTools);

    async function callSubjectModel(state: typeof MessagesAnnotation.State) {
      const messages = state.messages;
      const response = await subjectModelWithTools.invoke(messages);

      if (response.tool_calls?.length) {
        return new Command({
          goto: "subject-tools",
          update: {
            messages: [response],
          },
        });
      }

      console.log({ callSubjectModel: messages });

      return new Command({
        goto: "generate-agent",
        update: {
          messages: [response],
        },
      });
    }