Ppt Design Skill

PPT Design Skill

Quick Reference

Reading Content

# Text extraction
python -m markitdown presentation.pptx

# Visual overview
python scripts/thumbnail.py presentation.pptx

# Raw XML
python scripts/office/unpack.py presentation.pptx unpacked/

Editing Workflow

Read editing.md for full details.

1. Analyze template with thumbnail.py
2. Unpack → manipulate slides → edit content → clean → pack

Creating from Scratch

Creation workflow（三段式，顺序固定）：

Step 1 · 规划（必做，禁止跳过）

Read references/design-playbook.md — 叙事弧、页面规划表、明暗节奏、版式决策树、自适应规则、中文排版、密度控制。

产出页面规划表（页码 → 版式 → 明暗 → 内容形状 → 视觉元素）后再写代码。

Step 2 · 生成

Read pptxgenjs.md for API details and corruption gotchas.

• 主题与配色：design-system.md（9 主题，只用安全字体）
• 版式代码：杂志风 templates/layouts/magazine-layouts.md / 瑞士风 templates/layouts/swiss-layouts.md / 分析模型 templates/layouts/analysis-models.md（SWOT/PEST/画布/双钻/竞争定位）
• 组件配方：templates/components.md
• 瑞士风硬约束：references/swiss-layout-lock.md

Step 3 · QA

按 references/checklist.md P0-P3 检查（见下方 QA 节）。

Design Ideas

Don't create boring slides. Plain bullets on a white background won't impress anyone. Consider ideas from this list for each slide.

Before Starting

• Pick a bold, content-informed color palette: The palette should feel designed for THIS topic. If swapping your colors into a completely different presentation would still "work," you haven't made specific enough choices.
• Dominance over equality: One color should dominate (60-70% visual weight), with 1-2 supporting tones and one sharp accent. Never give all colors equal weight.
• Dark/light contrast: Dark backgrounds for title + conclusion slides, light for content ("sandwich" structure). Or commit to dark throughout for a premium feel.
• Commit to a visual motif: Pick ONE distinctive element and repeat it — rounded image frames, icons in colored circles, thick single-side borders. Carry it across every slide.

Design System Quick Start

For pre-built themes and layout coordinates, see design-system.md. It provides:

• 9 built-in themes (5 magazine + 4 Swiss) with ready-to-use PptxGenJS color configs
• 32 layout templates — 完整代码见 templates/layouts/（杂志 10 + 瑞士 22）
• Office 安全字体 pairings for both magazine (serif) and Swiss (sans-serif) styles

规划先行：写代码前先读 references/design-playbook.md，产出页面规划表。版式坐标是基线不是牢房——按 playbook 第 4 节的自适应规则变形。

7-Question Clarification (optional best practice when user has only a vague idea):

1. Audience & scenario: Roadshow / internal share / tech launch / portfolio / academic?
2. Duration & page count: 10-12 / 15-20 / 25+ slides?
3. Existing materials: Documents / links / old PPT / data / images?
4. Theme choice: See Color Palettes below — magazine (elegant/humanistic) or Swiss (minimal/rational)?
5. Style preference: Serif titles with warm tones, or sans-serif with high-contrast accent colors?
6. Language: Chinese / English / bilingual?
7. Deliverables: PPTX only / also need cover images / also need web version?

风格画廊技巧（借鉴 humanize-ppt）：用户对主题犹豫时，不要盲选——用 2-4 套候选主题各渲染一张封面给用户挑，选定后再出全 deck。

Theme usage rhythm:

Cover       →  Main theme (consistent across deck)
Section     →  Same theme, variant switch (light/dark)
Data page   →  Same theme, light variant
Highlight   →  Same theme, dark variant
Closing     →  Same theme, dark variant or cover style

Rule: Never switch to a different theme mid-deck.

Color Palettes

Choose colors that match your topic — don't default to generic blue. Use these palettes as inspiration, or pick from the built-in design system themes below.

Built-in Design System Themes

Pre-configured themes with PptxGenJS-ready color values. See design-system.md for full config code.

Magazine Style (serif titles, warm tones, editorial feel):

Swiss Style (sans-serif, grid-driven, high-contrast accent):

General Inspiration Palettes

For Each Slide

Every slide needs a visual element — image, chart, icon, or shape. Text-only slides are forgettable.

Layout options:

• Two-column (text left, illustration on right)
• Icon + text rows (icon in colored circle, bold header, description below)
• 2x2 or 2x3 grid (image on one side, grid of content blocks on other)
• Half-bleed image (full left or right side) with content overlay)

Built-in layout templates (see design-system.md for coordinates):

Magazine Style (10 layouts): cover, section, big-number, two-column, image-grid, pipeline, question, quote, before-after, mixed

Swiss Style (22 layouts): S01-S22 grid-based layouts with strict 12-column alignment

Layout diversity rules (from references/checklist.md):

• Avoid using the same layout for every slide — vary columns, cards, and callouts
• Mix at least 4 different layout types per deck
• Never use the same layout type more than 3 times in a row
• Match information density to layout (cover = lowest, appendix = highest)

Data display:

• Large stat callouts (big numbers 60-72pt with small labels below)
• Comparison columns (before/after, pros/cons, side-by-side options)
• Timeline or process flow (numbered steps, arrows)

Visual polish:

• Icons in small colored circles next to section headers
• Italic accent text for key stats or taglines

Typography

Choose an interesting font pairing — don't default to Arial. Pick a header font with personality and pair it with a clean body font.

General Pairings

Design System Font Pairings

For built-in themes, use these pre-mapped pairings (see design-system.md). 只用 Office 安全字体——用户机器上没有的字体（Inter / Playfair / Noto 系列）会 fallback 到宋体：

Magazine Style (serif headers, editorial):

Swiss Style (sans-serif throughout, grid-driven):

Spacing

• 0.5" minimum margins
• 0.3-0.5" between content blocks
• Leave breathing room—don't fill every inch

Avoid (Common Mistakes)

• Don't repeat the same layout — vary columns, cards, and callouts across slides
• Don't center body text — left-align paragraphs and lists; center only titles
• Don't skimp on size contrast — titles need 36pt+ to stand out from 14-16pt body
• Don't default to blue — pick colors that reflect the specific topic
• Don't mix spacing randomly — choose 0.3" or 0.5" gaps and use consistently
• Don't style one slide and leave the rest plain — commit fully or keep it simple throughout
• Don't create text-only slides — add images, icons, charts, or visual elements; avoid plain title + bullets
• Don't forget text box padding — when aligning lines or shapes with text edges, set margin: 0 on the text box or offset the shape to account for padding
• Don't use low-contrast elements — icons AND text need strong contrast against the background; avoid light text on light backgrounds or dark text on dark backgrounds
• NEVER use accent lines under titles — these are a hallmark of AI-generated slides; use whitespace or background color instead

QA (Required)

Assume there are problems. Your job is to find them.

Your first render is almost never correct. Approach QA as a bug hunt, not a confirmation step. If you found zero issues on first inspection, you weren't looking hard enough.

Content QA

python -m markitdown output.pptx

Check for missing content, typos, wrong order.

When using templates, check for leftover placeholder text:

python -m markitdown output.pptx | grep -iE "xxxx|lorem|ipsum|this.*(page|slide).*layout"

If grep returns results, fix them before declaring success.

Visual QA

⚠️ USE SUBAGENTS — even for 2-3 slides. You've been staring at the code and will see what you expect, not what's there. Subagents have fresh eyes.

Convert slides to images (see Converting to Images), then use this prompt:

Visually inspect these slides. Assume there are issues — find them.

Look for:
- Overlapping elements (text through shapes, lines through words, stacked elements)
- Text overflow or cut off at edges/box boundaries
- Decorative lines positioned for single-line text but title wrapped to two lines
- Source citations or footers colliding with content above
- Elements too close (< 0.3" gaps) or cards/sections nearly touching
- Uneven gaps (large empty area in one place, cramped in another)
- Insufficient margin from slide edges (< 0.5")
- Columns or similar elements not aligned consistently
- Low-contrast text (e.g., light gray text on cream-colored background)
- Low-contrast icons (e.g., dark icons on dark backgrounds without a contrasting circle)
- Text boxes too narrow causing excessive wrapping
- Leftover placeholder content

For each slide, list issues or areas of concern, even if minor.

Read and analyze these images:
1. /path/to/slide-01.jpg (Expected: [brief description])
2. /path/to/slide-02.jpg (Expected: [brief description])

Report ALL issues found, including minor ones.

Pre-Flight Checklist

Before declaring success, run through references/checklist.md (P0-P3 levels):

P0 — Must fix before delivery:

• No placeholder text remaining (xxxx, lorem, ipsum, this page layout)
• No text overflow or cut-off at slide edges
• No overlapping elements (text through shapes, lines through words)
• Theme consistent across all slides (no mid-deck color switch)
• Font sizes meet minimums (title >= 36pt, body >= 14pt)

P1 — Should fix:

• Layout variety >= 4 different types
• No same layout repeated > 3 times in a row
• Margins >= 0.5" on all sides
• Contrast sufficient (no light-on-light or dark-on-dark text)

P2 — Polish:

• No accent lines under titles (whitespace or background color instead)
• Icons have contrasting circular backgrounds where needed
• Image proportions match layout slots (no stretched/squashed images)

P3 — Nice to have:

• File size reasonable (< 50MB for image-heavy decks)
• Cross-device compatible fonts used
• Print preview readable in grayscale

Verification Loop

1. Generate slides → Convert to images → Inspect
2. List issues found (if none found, look again more critically)
3. Fix issues — 按失败模式目录的修复顺序：内容 → 结构 → 版式 → 样式，不要从样式开始修
4. Re-verify affected slides — one fix often creates another problem
5. Repeat until a full pass reveals no new issues. 最多 3 轮；3 轮后仍有 P0 问题，向用户说明剩余问题，不要无限重试。

Do not declare success until you've completed at least one fix-and-verify cycle.

Design System Reference

Converting to Images

Convert presentations to individual slide images for visual inspection:

python scripts/office/soffice.py --headless --convert-to pdf output.pptx
pdftoppm -jpeg -r 150 output.pdf slide

This creates slide-01.jpg, slide-02.jpg, etc.

To re-render specific slides after fixes:

pdftoppm -jpeg -r 150 -f N -l N output.pdf slide-fixed

Dependencies

• pip install "markitdown[pptx]" - text extraction
• pip install Pillow - thumbnail grids
• npm install -g pptxgenjs - creating from scratch
• LibreOffice (soffice) - PDF conversion (auto-configured for sandboxed environments via scripts/office/soffice.py)
• Poppler (pdftoppm) - PDF to images