What the driver runs
build/score_all.py lists this tool as canvas-editor plus its plugin, and scores out/canvas. build/run_all.sh runs the Vitest harness under harness/canvas. That harness imports @hufe921/canvas-editor and @hufe921/canvas-editor-plugin-docx. This note does not publish a new round-trip percentage for that output.
What it is
canvas-editor draws the document on Canvas and SVG. The DOCX plugin is what the harness uses to import and export.
Trivia
The license is MIT, copyright 2021–present hufe. The README says the editor takes over the rendering pipeline, unlike a contenteditable editor, so typography is not left to the browser's editing host. The live demo is hufe.club/canvas-editor.