document-conversion

# Document Conversion Convert documents and URLs to markdown using a three-tier fallback strategy. This skill is infrastructure: consumer skills reference it via dependency rather than reimplementing conversion logic. ## When To Use - Converting PDF, DOCX, PPTX, XLSX, HTML, or images to markdown for downstream processing - Any skill that ingests external documents - File format is not plain text or markdown ## When NOT To Use - Content is already markdown or plain text - You only need to read a small text file (use Read directly) ## Format Detection Identify the document type from the URI before converting. | Extension | Format | Tier 1 | Tier 2 | |-----------|--------|--------|--------| | `.pdf` | PDF | Yes | Read tool (pages) | | `.docx`, `.doc` | Word | Yes | None | | `.pptx`, `.ppt` | PowerPoint | Yes | None | | `.xlsx`, `.xls` | Excel | Yes | None | | `.html`, `.htm` | HTML | Yes | WebFetch | | `.csv` | CSV | Yes | Read tool | | `.json` | JSON | Yes | Read tool | | `.xml` | XML | Yes | Read tool | | `.png`, `.jpg`, `.jpeg`, `.gif`, `.webp` | Image | Yes | Read tool (visual) | | `.mp3`, `.wav`, `.m4a` | Audio | Yes | None | | `.zip` | Archive | Yes | None | | `.epub` | E-book | Yes | None | See `modules/format-matrix.md` for quality comparison across tiers. ## Conversion Protocol To convert a document to markdown: ``` 1. DETECT -- Identify format from URI extension or context 2. TRY -- Tier 1: MCP markitdown (best quality) 3. DEGRADE -- Tier 2: native C...