.md files are second-class inconsistently — rendered sites get dead links
Three .md/.mkd policies disagree (MARK.cli.c:29-35/:107, MARK.c:134): the directory walk renders only *.mkd (a .md page gets no HTML at all); single-file mark Note.md writes Note.md.html (mark_dropext strips only .mkd); a refdef [A]: page.md keeps href="page.md" verbatim (mark_emit_url rewrites only .mkd) — while implicit/path links DO rewrite .md→./Note.html. Whichever way a .md page is referenced, the rendered site ends with a dead or mismatched link. From the 2026-07-07 mark/ diagnostic review, orchestrator-verified ([A]: page.md → href="page.md"). Method Issues.
page.md emits the raw .md href; implicit links rewrite to .html — one source, two policies.README.md, INDEX.md, CLAUDE.md vs wiki .mkd) — the mixed case is the normal case..md: either a first-class StrictMark extension (walk renders it, dropext strips it, urls rewrite it — everywhere) or explicitly unsupported (refuse loudly, never half-render); all three sites agree..md page + .mkd page cross-linking both ways; the ruling is gritzko's call before implementation.