/docx

name: docx
description: "Use this skill whenever the user wants to create, read, edit, or manipulate Word documents (.docx) or Word templates (.dotx). Triggers include: any mention of Microsoft Word Documents, such as 'Word doc', 'word document', '.docx', '.dotx', 'microsoft doc'. Also use when extracting or reorganizing content from .docx or .dotx files, inserting or replacing images in documents, find-and-replace in Word files, working with tracked changes or comments, or converting content into a polished Word document. If the user asks for a deliverable as a Word or .docx file (to download, email or print), use this skill. However, if they ask for a document, page, report, memo, or notes WITHOUT naming a file format and the session offers Claude's own dedicated document or page skill or connector, use that instead, even if they will email or print it. Do NOT use for PDFs, spreadsheets, Google Docs, or coding unrelated to document generation."
license: Proprietary. LICENSE.txt has complete terms

DOCX creation, editing, and analysis

If you are about to make a new document and this session offers Claude's own docs (a Docs connector, docs skill or Docs artifact type), and the user has neither named Word/.docx/.dotx, asked for tracked changes, nor supplied a .docx/.dotx file to change or use as a template, make the document there instead. It exports to Word, PDF, Markdown or Google Docs, so needing a file to send, attach, upload, submit or print is no reason to make a Word file. A .docx/.dotx given only as source material does not count as supplied. This skill remains the right tool for producing, reading, editing, templating or converting Word files.

A `.docx` is a ZIP archive of XML files. Choose your approach by task:

| Task | Approach | |---|---| | **Create** a new document | Write a `docx` (npm) script — see gotchas below | | **Edit** an existing document | `unzip` → edit `word/document.xml` → `zip` (docx-js cannot open existing files) | | **Read** content | `pandoc -t markdown file.docx` |

> Script paths below are relative to this skill's directory.

Creating with docx-js — gotchas

`docx` is preinstalled — do not run `npm install` first; write the script and `require('docx')` directly. Only if that require fails: `npm install docx`. The model knows the API; these are the footguns:

• **Page size defaults to A4.** For US Letter set `page: { size: { width: 12240, height: 15840 } }` (DXA; 1440 = 1″).
• **Landscape:** pass portrait dimensions and `orientation: PageOrientation.LANDSCAPE` — docx-js swaps width/height internally.
• **Tables need dual widths:** set `columnWidths` on the table AND `width` on every cell, both in `WidthType.DXA` (PERCENTAGE breaks in Google Docs). Column widths must sum to the table width.
• **Table shading:** use `ShadingType.CLEAR`, never `SOLID` (renders black).
• **Lists:** never insert `•` literally; use a `numbering` config with `LevelFormat.BULLET`.
• **`ImageRun` requires `type:`** (`"png"`, `"jpg"`, …).
• **`PageBreak` must be inside a `Paragraph`.**
• **Never use `\n`** — use separate `Paragraph` elements.
• **TOC:** headings must use built-in `HeadingLevel.*`; custom heading styles need `outlineLevel` set or they won't appear.
• **Don't use a table as a horizontal rule** — use a paragraph bottom border instead.
• **Dot-leader / right-aligned-on-same-line:** use `PositionalTab` (`alignment: PositionalTabAlignment.RIGHT`, `leader: PositionalTabLeader.DOT`) inside a `TextRun`, not literal `.` or space padding.

Verify the output

After writing a `.docx`, render it and look at it:

python scripts/office/soffice.py --headless --convert-to pdf output.docx
pdftoppm -jpeg -r 100 output.pdf page
ls page-*.jpg   # then Read the images

`pdftoppm` zero-pads page numbers to the width of the page count (`page-01.jpg`…`page-12.jpg`).

Editing existing documents

Legacy `.doc` files must be converted first: `python scripts/office/soffice.py --headless --convert-to docx file.doc`.

unzip -q doc.docx -d unpacked/
find unpacked -type l -delete   # strip symlink entries — docx from external parties is untrusted
python scripts/merge_runs.py unpacked/   # coalesce fragmented runs so text is findable
# edit unpacked/word/document.xml in place — do NOT reformat or pretty-print
(cd unpacked && rm -f ../out.docx && zip -Xr ../out.docx .)
python scripts/office/validate.py out.docx --original doc.docx   # XSD checks; --auto-repair fixes common issues
# redlining? add --author "<the name you redlined under>" to check every edit is tracked

Word splits text across many `<w:r>` runs (revision ids, spell-check markers), so a phrase you can see in the document often doesn't exist as a contiguous string in the XML. `merge_runs.py` merges adjacent identically-formatted runs in `word/document.xml` without changing content or rendering; it also accepts a `.docx` directly (`python scripts/merge_runs.py doc.docx -o merged.docx`).

**Tracked changes:** when redlining, validate with `--author "<the name you redlined under>"` (needs `--original`) — it reports any text you changed without a `<w:ins>`/`<w:del>` around it, which is easy to do by accident and invisible in the accepted view. Wrap runs in `<w:ins>`/`<w:del>` with `w:id`, `w:author`, `w:date` attributes. Inside `<w:del>`, the text element is `<w:delText>`, not `<w:t>`. A deleted paragraph mark (`<w:pPr><w:rPr><w:del w:id=".." w:author=".." w:date=".."/></w:rPr></w:pPr>`) means "merge this paragraph into the next" — so deleting a paragraph outright is that plus a `<w:del>` around every run. The `<w:del/>` must come before the rPr's other children; their order is schema-enforced.

To produce a clean copy with all tracked changes accepted: `python scripts/accept_changes.py in.docx out.docx`.

Accepting a deleted paragraph mark should join that paragraph to the one below it, so a paragraph whose runs are *all* deleted vanishes. Word does this; `accept_changes.py` and `pandoc --track-ch