lcert_verify.diff
Compare two bundles: what changed, and did it help.
The question anyone iterating on a design actually asks is not "does this verify" but "is it better than last time". That needs a comparison that says which loci changed class and which way the margins moved.
One rule throughout: a diff is not a verdict. It reports movement between two
artifacts and nothing more. If either side does not verify, that is stated and
the comparison is still shown — but regressed is computed only from what both
sides actually establish, never from a bundle that failed to check.
Compare two bundle directories.
Anchors are optional here and their absence is reported rather than ignored: a diff between two unanchored bundles compares two documents of unknown provenance, which is worth knowing before acting on it.