Whole-artifact review of e48bb8d returned one blocking finding: M6 was not
covered by round 3's own channel rule.
Pin 6a requires an exact violation set without saying how, so a conforming
assert!(violations.len() == 1 && ...) satisfies it and prints nothing on
failure -- and that assertion is precisely what M6 trips. Gate 6 and §6 item 2e
use the passing-test model, source assertions plus ok. So M6 reverted to "the
named test failed", the signature this contract rejects.
Pin 6a gains a harness for m41, m41b and the generator test: bind
check_invariants to a local before any assertion; make the cardinality check an
assert_eq! on that local with the full violations vector in its diagnostic; and
make it the first assertion after the bindings, since it is the one M6 trips.
Gate 6 now confirms the macro. M6a/M6b quote the failing output plus the
sibling's pass verdict.
Round 3 wrote the channel rule and applied it to M1, M2 and M5 -- the
mutations named in that round's finding -- and not to M6, which has the
identical need. Round 3's text even carved M6 out, listing it among mutations
that "already met the standard": true of its behavioural observation, which
names the state, and false of its channel, which had none.
The macro is part of the channel, not a style choice. assert_eq! prints
left/right; assert! prints only its message. Under M6a the S->G arm is gone,
check_invariants returns empty for m41's fixture, and assert_eq! prints 0
against 1 with an empty vector -- that is "the violation went unreported",
quoted rather than inferred. With assert! the same requirement is met with no
evidence. Where a mutation's observation IS the compared value, the pin must
name the macro; the rule is now at the head of §3 rather than left to each
mutation.
A second gap closed with it. M6a also breaks the generator test, since that
fixture is S->G. Unstated, an executor either reports a defect that is not one
or ignores a failure it cannot classify. M6b leaving the generator green is now
recorded as positive evidence that touch row 8's pinned direction holds. A
mutation must state every test it is expected to break, or its blast radius is
discovered instead of specified.
Still DRAFT, still unratified. No implementation work has begun.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Ps1szk2mSfgp4Cz21eVH9x
Levi Neuwirth
85429d6243