Presentations

• Prefer artifact.create with format: "pptx" or format: "html". PPTX also writes a companion *.slides.html for browser presentation.
• Build decks like a designed webpage, not a Word outline: dark title/closing, varied layouts, one idea per slide, generous hierarchy.
• Every deck must include visuals, not text-only slides:
  • ≥1 chart slide (layout: "chart") with real numbers from the source document
  • ≥1 stage/process slide (layout: "timeline" or "process") for milestones, rollout, or workflow
  • ≥1 image/showcase slide (layout: "image") — call image_generate first when helpful, then pass imagePath
• Pass structured slides with optional layout: title | section | bullets | columns | cards | stat | chart | timeline | process | image | closing.
• Keep bullets ≤ 5 per slide; never dump long paragraphs. Split dense content across more slides.
• Use CJK-safe fonts (Microsoft YaHei). Theme is ink + teal — do not invent purple/gray Office defaults.
• Reopen/inspect the file before claiming success. For HTML decks, tell the user they can open the .html / .slides.html to present with arrow keys.

Chart slide (统计图)

{
  "title": "市场规模趋势",
  "layout": "chart",
  "body": "数据来源：行业报告 2024",
  "chart": {
    "type": "bar",
    "categories": ["2022", "2023", "2024"],
    "values": [120, 180, 240],
    "seriesName": "销量（万辆）"
  }
}

Supported chart types: bar, line, pie, doughnut, area. Extract categories and values from tables or prose in the source — do not invent numbers.

Stage / process slide (阶段图)

{
  "title": "实施路径",
  "layout": "timeline",
  "phases": [
    { "label": "P1", "title": "调研摸底", "body": "现状与痛点梳理" },
    { "label": "P2", "title": "试点验证", "body": "2-3 个场景上线" },
    { "label": "P3", "title": "全面推广", "body": "标准化复制" }
  ]
}

Use layout: "process" as an alias for timeline.

Image / showcase slide (展示图)

1. When a visual helps (产品图、场景图、封面图), call image_generate with a concrete prompt.
2. Pass the downloaded workspace path as imagePath (e.g. .newbrain/generated-media/image/xxx.png).
3. If generation is skipped, still add an image slide with imagePlaceholder describing the intended visual.

{
  "title": "产品场景示意",
  "layout": "image",
  "imagePath": ".newbrain/generated-media/image/scene.png",
  "caption": "智慧园区巡检场景"
}