ref-check — careful reference verification

The iron rule, and why it exists

NEVER guess or trust-from-memory an arXiv ID, journal reference, year, author list, page range, or title. Every factual field is verified against a fetched authoritative record before an entry is added, approved, or "fixed." Training-data recall of bibliographic details is a hypothesis to verify, never a source. If a field cannot be verified after trying at least two sources, it is FLAGGED, not silently kept or invented.