PM wrote this mutant outside the tree 2026-09-18 and it survived 155
green tests. Reproduced here on the mutant as committed: `98 passed`,
rc 0, the pattern applied exactly once.
`_document_unit` refuses a report that declares a document `rejected`
while a concept in the bundle names it -- one of the six refusals B-1
introduced, and the only one no test drives from either side. The check
works; nothing stops the next refactor removing it. With H4 in place
the harness now exits 1 on this survivor, so the red is the harness's
own verdict and not a line in its output.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Kjell Tore Guttormsen
a59898ee8f