pptx
The pptx skill enables creation, editing, reading, and manipulation of PowerPoint presentations. Use it whenever working with .pptx files, including extracting text from existing presentations, creating new slide decks from templates or scratch, modifying existing slides, or combining presentation files. The skill provides tools for content analysis via text extraction, visual thumbnails, and XML unpacking, alongside design guidance for creating visually cohesive presentations with intentional color palettes and repeating visual motifs.
git clone --depth 1 https://github.com/ginlix-ai/LangAlpha /tmp/pptx && cp -r /tmp/pptx/skills/pptx ~/.claude/skills/pptxSKILL.md
# PPTX Skill
## Quick Reference
| Task | Guide |
|------|-------|
| Read/analyze content | `python -m markitdown presentation.pptx` |
| Edit or create from template | Read [editing.md](editing.md) |
| Create from scratch | Read [pptxgenjs.md](pptxgenjs.md) |
---
## Reading Content
```bash
# 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.**
Use when no template or reference presentation is available.
---
## 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:
| Theme | Primary | Secondary | Accent |
|-------|---------|-----------|--------|
| **Midnight Executive** | `1E2761` (navy) | `CADCFC` (ice blue) | `FFFFFF` (white) |
| **Forest & Moss** | `2C5F2D` (forest) | `97BC62` (moss) | `F5F5F5` (cream) |
| **Coral Energy** | `F96167` (coral) | `F9E795` (gold) | `2F3C7E` (navy) |
| **Warm Terracotta** | `B85042` (terracotta) | `E7E8D1` (sand) | `A7BEAE` (sage) |
| **Ocean Gradient** | `065A82` (deep blue) | `1C7293` (teal) | `21295C` (midnight) |
| **Charcoal Minimal** | `36454F` (charcoal) | `F2F2F2` (off-white) | `212121` (black) |
| **Teal Trust** | `028090` (teal) | `00A896` (seafoam) | `02C39A` (mint) |
| **Berry & Cream** | `6D2E46` (berry) | `A26769` (dusty rose) | `ECE2D0` (cream) |
| **Sage Calm** | `84B59F` (sage) | `69A297` (eucalyptus) | `50808E` (slate) |
| **Cherry Bold** | `990011` (cherry) | `FCF6F5` (off-white) | `2F3C7E` (navy) |
### 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.
| Header Font | Body Font |
|-------------|-----------|
| Georgia | Calibri |
| Arial Black | Arial |
| Calibri | Calibri Light |
| Cambria | Calibri |
| Trebuchet MS | Calibri |
| Impact | Arial |
| Palatino | Garamond |
| Consolas | Calibri |
| Element | Size |
|---------|------|
| Slide title | 36-44pt bold |
| Section header | 20-24pt bold |
| Body text | 14-16pt |
| Captions | 10-12pt muted |
### 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
```bash
python -m markitdown output.pptx
```
Check for missing content, typos, wrong order.
**When using templates, check for leftover placeholder text:**
```bash
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 whatIntegrated 3-statement financial model: linked income statement, balance sheet, and cash flow
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Financial model audit: structural checks, formula validation, integrity testing
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Comparable company analysis: operating metrics, valuation multiples, peer benchmarking
DCF valuation: free cash flow projections, WACC, terminal value, sensitivity analysis