req.write(
      JSON.stringify({
        mode: "chat",
        model: "",
        action: "next",
        userAction: "chat",
        requestId: util.uuid(false),
        sessionId,
        sessionType: "text_chat",
        parentMsgId,
        params: {
          "fileUploadBatchId": util.uuid(),
          "searchType": searchType,
          "deepThink": model === "qwq", 
        }