PPTX Skill

Quick Reference

Exploratory セミナー用スライドを作成する場合: 必ず exploratory-slides スキルのデザインガイドを参照し、カラーパレット・タイポグラフィ・レイアウト・Keynote互換性ルールに従うこと。

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

Read pptxgenjs.md for full details.

Use when no template or reference presentation is available.

Design Guide

重要: このプロジェクトでは exploratory-slides スキルのデザインガイドに従うこと。 以下の汎用ガイドラインは 無視 し、必ず exploratory-slides/SKILL.md を読んでそちらに従うこと。

このプロジェクトは Exploratory セミナー用のため、独自のデザイン標準がある:

• •カラー: 白背景 + 黒テキスト + グリーンアクセント(#4CA872)のみ。派手な色は使わない
• •フォント: Hiragino Sans / Helvetica Neue のみ（Keynote互換）。Calibri、Georgia等は使用禁止
• •スタイル: ミニマリスト。白背景に箇条書きのシンプルなスライドが基本スタイル
• •装飾: 最小限。丸数字、カラフルなアイコン、グラデーション、色付きボックスは使わない

詳細は exploratory-slides/SKILL.md を参照。

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.

**Design rules for this presentation:**
[ここにデザインガイドの要約を記載 — 背景色、アクセントカラー、フォント、装飾ルール等]

Look for:
- Background color violations (design guide で指定された背景色と異なるスライドがないか)
- Overlapping elements (text through shapes, lines through words, stacked elements)
- Text overflow or cut off at edges/box boundaries
- Japanese text orphans (1-2文字だけが次の行に折り返されている箇所)
- 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

**IMPORTANT:** Only inspect the slide images. Do NOT read or analyze code files.

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.

ヒント: デザインガイド（例: exploratory-slides/SKILL.md）がある場合、サブエージェントのプロンプトにその要約（背景色、アクセントカラー、フォント制限等）を必ず含めること。ルールを知らないサブエージェントは違反を検出できない。

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:

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

Note: pdftoppm のファイル名は {prefix}-{page}.jpg の形式。-f 9 -l 9 の場合、slide-fixed-09.jpg になる。

Cleanup

QA完了後、一時ファイルを削除:

rm -f slide-*.jpg slide-fixed-*.jpg output.pdf

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