Function appendModelOutputContent

frontend/lib/chatMessageExtractor.ts:107–138

(
      step: AgentStep,
      content: string,
      subType?: StepContent["subType"]
    )

    let lastModelOutputIndex = -1;

    const appendModelOutputContent = (
      step: AgentStep,
      content: string,
      subType?: StepContent["subType"]
    ) => {
      if (!content || !content.trim()) {
        return;
      }

      if (
        lastModelOutputIndex >= 0 &&
        step.contents[lastModelOutputIndex] &&
        step.contents[lastModelOutputIndex].type ===
          chatConfig.messageTypes.MODEL_OUTPUT &&
        step.contents[lastModelOutputIndex].subType === subType
      ) {
        step.contents[lastModelOutputIndex].content += content;
        return;
      }

      step.contents.push({
        id: `model-${Date.now()}-${Math.random()
          .toString(36)
          .substring(2, 7)}`,
        type: chatConfig.messageTypes.MODEL_OUTPUT,
        subType,
        content,
        expanded: true,
        timestamp: Date.now(),
      });
      lastModelOutputIndex = step.contents.length - 1;
    };

    const resetModelOutputTracking = () => {
      lastModelOutputIndex = -1;