DOCX ↔ Typst Bridge

Typst source is the thing the repo keeps. Word is the thing coauthors edit. This skill moves a document across that boundary in both directions and reconciles what comes back.

The load-bearing fact: typ → docx → typ reaches a fixed point after one pass. So the pipe's output is itself valid Typst, the canonical form can be committed, and reconciling a coauthor's returned file collapses from "read two documents side by side" to git merge-file.