Uses markitdown-no-magika (lighter fork without magika/onnxruntime) to handle PDF, HTML, DOCX, PPTX, XLSX, XLS, CSV, JSON, and XML files. Specialized extractors (pymupdf4llm, markdownify) remain as fallbacks when markitdown is not installed. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>