Addresses the #1314 maintainer review (trek-e):
- Major 1 (fail-OPEN): defaultProveFailFirst's node-test branch only guarded
`if (!fixture)`. A missing/typo'd/stale violationFixture made GSD_PROHIB_SUBJECT
point at a missing file; an honest negative test threw ENOENT *inside its
callback* (a failing test named distinctly from the file), which
isNonVacuousNodeTestRed accepted as proof -> a green forged from a setup crash.
Now requires fs.existsSync(path.resolve(cwd, fixture)) before spawning, symmetric
with the lint-rule path's file-result guard. Regression test pins it (RED without
the guard); a second test pins cwd-relative fixture resolution.
- Major 2 (misleading prose): the #1278 projection carries no violationFixture, so
the deterministic-locate path always hard-gates (fail-closed) until a
check_violation_fixture scalar is threaded through. verify-phase.md and
prohibition-probe.md no longer read as if the projected path produces greens;
the ADR-550 addendum records both items. Tracked as follow-up #1346.
- Documented residual: existence is necessary but not sufficient (a red caused by
the env being set vs the subject's content); recorded as a constraint, in #1346.
- Nit: stale 'NOT attested fail-first' comment -> 'NOT machine-proven fail-first'.
64 tests pass; eslint + tsc clean; changeset valid.
33b6ee6f0c