Score 66% to 77.62%, every named survivor group killed, no production code
touched. The score is the least interesting part.
Two of the mutants Soul called live are equivalent: within one hop direction
the anchor and role already determine the target, so the pair cannot diverge.
They are recorded as equivalent so nobody pays for them a third time. And a
sixth mutant nobody had named survived in the same method on R-B's primary
ordering key, which means the rule R-B exists to protect had its first
component unguarded and the triage missed it.
The digest needed a golden value rather than a comparison. A same-versus-
different test cannot catch a mutant that swaps which case gets which flag,
because the two digests still differ, just mislabelled. The golden was
reconstructed from the method's documented contract rather than its own
helpers, which is what makes it evidence.
Three suspected real defects were flagged rather than quietly fixed, and get
behaviour tests first. The reachable one is an out-of-bounds read from an
attacker-supplied cursor.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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