pm-shawn/abu-cowork/pptx

PPTX 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](editing.md) for full details.

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

Creating from Scratch

Read [pptxgenjs.md](pptxgenjs.md) for full details. Alternatively, read python-pptx.md if Python is available.

Use when no template or reference presentation is available.

Writing large scripts

生成脚本通常几百行。不要用 write_file 写大脚本（会导致 JSON 截断），改用 run_command + heredoc：

cat << 'SCRIPT_EOF' > /tmp/build_ppt.js
const pptxgen = require("pptxgenjs");
// ... your script here ...
SCRIPT_EOF

如果脚本超过 200 行，用 >> 追加模式分批写入。

Output rules

• 只输出 .pptx 文件，不要生成 HTML 预览、临时 PDF、截图等中间文件
• 脚本文件（.js/.py）写到 /tmp，用完即弃，不要放在输出目录

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.

Color Palettes

Choose colors that match your topic — don't default to generic blue. Use these palettes as inspiration:

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

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.

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 (Quick Check)

After generating, do a quick content check:

python -m markitdown output.pptx

Verify: all content is present, no typos, correct order. If using templates, check for leftover placeholders:

python -m markitdown output.pptx | grep -iE "xxxx|lorem|ipsum|placeholder"

Fix any issues found, then deliver the result. Do NOT convert to images or delegate to subagents for visual inspection — deliver promptly and let the user request adjustments if needed.

Dependencies

• npm install pptxgenjs - creating from scratch (JS approach)
• python-pptx - creating from scratch (Python approach, may be pre-installed)
• pip install "markitdown[pptx]" - text extraction (for QA)