The docx package always writes the element; the page-background pass
prepended a second one, breaking the CT_Settings sequence so Word
repairs the file on open — and the repair drops every header and
footer reference. The schema test's DOCX leg now builds with the
page decor, line numbering and fold marks, which covers the pass.
tests/kitchenSink.ts authors one deterministic document using every
feature; schema-validation.test.ts validates its .odt against the ODF 1.3
RelaxNG and its .docx parts (after MCE resolution, as Word reads them)
against the ECMA-376 transitional XSDs — the structural half of Word's
strict reader, which LibreOffice silently forgives. Schemas vendored under
tests/schemas/ (sources and offline patches in its README); self-skips
without xmllint, which CI now installs.
Steffen Becker