review-run-A.md (5 findings) and review-run-B.md (6 findings, A ⊂ B) form a
known-Jaccard fixture pair: |A ∩ B| = 5, |A ∪ B| = 6, Jaccard = 5/6 = 0.833,
above the SC4 threshold of 0.70. IDs are real 40-char SHA1s computed via
lib/parsers/finding-id.mjs from realistic (file, line, rule_key) triplets.
Both fixtures pass review-validator --strict (frontmatter + body sections +
findings shape). Real-LLM determinism measurement deferred to v1.1.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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