Every version, command, and support claim in the README matches the repository
Documentation drifts silently. A README promising support for a runtime version the test matrix dropped two releases ago sends a contributor into an afternoon of debugging that ends in your issue tracker.
Observable check
runtime versions, package versions, install commands, and CLI flags quoted in README.md appear with the same values in the package manifest, the CI configuration, and the source.
Where this comes from
Last read against these sources on 2026-07-28.
Same provenance and same caveat as R-DOC-01. Upstream states it as 'Never invent facts' and 'A README with fabricated numbers is worse than one without numbers', and tells the author to ask for a benchmark rather than estimate one. That covers the claim half of this rule. Upstream is arguing against fabrication where this rule checks agreement with the repository, so the version and command halves, which are about drift rather than invention, are this standard's own.