# Pptx

> Use this skill any time a .pptx file is involved in any way — as input, output, or both. This includes: creating slide decks, pitch decks, or presentations; reading, parsing, or extracting text from any .pptx file (even if the extracted content will be used elsewhere, like in an email or summary); editing, modifying, or updating existing presentations; combining or splitting slide files; working…

- **Type:** Skill
- **Install:** `agentstack add skill-mfmezger-ai-agent-dotfiles-pptx`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [mfmezger](https://agentstack.voostack.com/s/mfmezger)
- **Installs:** 0
- **Category:** [Communication](https://agentstack.voostack.com/c/communication)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [mfmezger](https://github.com/mfmezger)
- **Source:** https://github.com/mfmezger/ai_agent_dotfiles/tree/main/shared/skills/pptx

## Install

```sh
agentstack add skill-mfmezger-ai-agent-dotfiles-pptx
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# 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 what you expect, not what's there. Subagents have fresh eyes.

Convert slides to images (see [Converting to Images](#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.
```

### Verification Loop

1. Generate slides → Convert to images → Inspect
2. **List issues found** (if none found, look again more critically)
3. Fix issues
4. **Re-verify affected slides** — one fix often creates another problem
5. Repeat until a full pass reveals no new issues

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

---

## Converting to Images

Convert presentations to individual slide images for visual inspection:

```bash
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:

```bash
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

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [mfmezger](https://github.com/mfmezger)
- **Source:** [mfmezger/ai_agent_dotfiles](https://github.com/mfmezger/ai_agent_dotfiles)
- **License:** MIT

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-mfmezger-ai-agent-dotfiles-pptx
- Seller: https://agentstack.voostack.com/s/mfmezger
- Browse the marketplace: https://agentstack.voostack.com/browse

---
Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.