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test: portable few-ULP check for recomputed shear eps metadata

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Cross-platform replay of the frozen assessor returned INVALID_SET because
recomputed eps(128) differed from the Horsea receipt by one ULP. Compare
only that derived float within 4 ULPs (close_ulps); hashes, case identity,
other metadata and scientific thresholds stay exact. Tests accept the
observed one/two-ULP differences and reject 1e-12 relative, 2x, string,
NaN and missing values.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Claude
2026-10-19 01:15:59 +00:00
co-authored by Claude Opus 5.5
parent 5fb95f5f4d
commit 9748ef91ef
3 changed files with 35 additions and 1 deletions
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@@ -337,3 +337,8 @@ Assessment:
- These are descriptive. Passing or failing another floor-controlled
screen is not the conclusion, and a two-resolution ratio is not a
convergence order.
- Portability: the receipt's recomputed `eps = |k|^2` is compared within
4 ULPs (`close_ulps`), not by exact equality. A cross-runtime replay
differed by one ULP: 0.012047856934923534 on Horsea vs
0.012047856934923532 elsewhere. Source and file hashes, case identity,
the other metadata and every scientific threshold stay exact.