Microsoft Markitdown Surges to 129K Stars With +1,876 Today: Document-to-Markdown Converter Becomes Default RAG Preprocessing Pipeline

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microsoft/markitdown converts files and office documents (PDF, DOCX, XLSX, PPTX, images) to clean Markdown format, establishing itself as the default preprocessing step for RAG pipelines and LLM context loading. Today's +1,876 star surge — its highest daily velocity in weeks — coincides with growing adoption as the standard ingestion layer for AI coding agents and document intelligence systems. At 129K stars, it's now Microsoft's second-most-starred AI tool after VS Code.