Docx

It gives Claude three different workflows depending on what you're doing: pandoc for quick text extraction, docx-js for creating new documents from scratch, and a Python OOXML library for editing existing files. The real value is in the redlining workflow, which lets you implement tracked changes properly by working at the XML level. If you're dealing with legal contracts, academic papers, or any document where you need professional change tracking instead of just overwriting content, this handles the messy OOXML details. The documentation emphasizes precision, like only marking text that actually changed rather than replacing entire sentences, which matters when humans review your edits.