[chaliy]

Requested by Михайло · project thread

What changed

PPTX is now converted to markdown behind a new pptx feature, which is included in all_formats, so the CLI and the Python, Node and WASM packages get it.

• Slides come out in p:sldIdLst order, each as a ## Slide N: <title> section.
• Body placeholders render as bullets, with nesting from a:pPr@lvl and buChar/buAutoNum/buNone honoured. Text boxes render as paragraphs.
• Tables keep gridSpan/rowSpan. Links come only from external relationships. Group shapes and mc:AlternateContent are walked.
• Speaker notes render under ### Notes.
• Hidden slides (show="0") are skipped with a hidden_slide_skipped warning unless include_hidden_content(true), the same switch feat(security): skip hidden content by default #42 added for hidden HTML/DOCX content.
• The title comes from the core properties, falling back to the first slide title. stats.pages is the slide count. With track_sources, each block records its slide number as the page.
• Legacy .ppt is detected as the new Format::Ppt and rejected explicitly. Macro-enabled ms-powerpoint.* content types map to PPTX. New Error::PptxExtract.
• The OOXML helpers that DOCX and PPTX share (relationships, inline runs, lists, table cells) move from docx.rs into a new ooxml.rs. DOCX behaviour is unchanged.
• xml.rs attributes keep their qualified names; attr() still matches by local name, and the new attr_prefixed() is used where r:id and id must not be confused.

Why

Third part of the #11 follow-ups. fetchkit's Office backend needs PPTX.

Before / After

markkit extract --file tests/fixtures/pptx/deck.pptx

Before: Unsupported format (PPTX was detected but rejected).

After:

## Slide 1: Q3 Results

Prepared by Finance

## Slide 2: Highlights

- Revenue up 12%
  - EMEA strongest
- **Bold** [docs](https://example.com/q3)

### Notes

Mention the hiring freeze.

## Slide 3: Numbers

| Region | Revenue |
| --- | --- |
| EMEA | 1.2M |
| APAC | 0.9 \| 1.0M |

just fmt lint test check-okf test-scripts examples pass locally.

Risk

• Medium: this is a new parser of untrusted input. It uses the same bounded ZIP and XML stack and parse budget as DOCX.
• Security tests:
  • a zip bomb slide
  • repeated slide references, bounded by the archive total size
  • billion laughs and deeply nested groups
  • random container bytes (proptest)
• Integration tests also cover broken slide references and internal or missing hyperlinks.
• The fixture deck.pptx was generated with python-pptx; the script is committed.

Checklist

• Tests added or updated (pptx_integration.rs, PPTX security tests, detection tests)
• Backward compatibility considered (additive; Format and Error are #[non_exhaustive])

Part of #11

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Generated by Claude Code