What the driver runs
build/score_all.py measures SuperDoc from out/superdoc. build/run_all.sh runs harness/superdoc.mjs. This note does not publish a new round-trip percentage for that output.
What it is
SuperDoc is a DOCX engine aimed at the browser and at the same Document API on a server or in an agent workflow. The README says the editor is built directly on OOXML and that edits write back to the XML without an HTML conversion step.
Trivia
The license is AGPL-3.0. The project site is superdoc.dev. The npm package name is superdoc.