{"key": "s1-port-b", "idea": "measure d-s1-retreat-crossing-port (retreat-crossing posterior reweight ported to spread 1) vs comparator N, seeds 431000-431499 paired", "candidate_sha256": "bed6def9407c0304d052bec656525e73fa9afd6c0422d6589c3c0f22d268bf9a", "comparator_sha256": "bf0d179f3e47d28819f6fa7e0d25548c2ced43374c216d36460b00a26a26ffae", "seeds": {"start": 431000, "end": 431499}, "n": 500, "complete": true, "missing_seeds": [], "failures": [], "check_values": [17.116002, 20.017111, 2.390311, 241.484752], "python_version": "3.12.3", "seconds_per_simulation": 0.783, "overall": {"n": 500, "sum_d": -202.69204549620017, "sum_d2": 102839.31930686689, "mean_diff": -0.40538409099240036, "se": 0.6417572043410619, "comparator_mean": 90.7981984582868, "candidate_mean": 90.39281436729439, "retail_diff": -0.06421567164800032, "arb_diff": -0.34116841935460007}, "by_spread": {"1": {"n": 120, "sum_d": -202.69204549620017, "sum_d2": 102839.31930686689, "mean_diff": -1.6891003791350014, "se": 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0.0], [431481, 2, 0.0], [431482, 3, 0.0], [431483, 2, 0.0], [431484, 1, 0.226708], [431485, 4, 0.0], [431486, 2, 0.0], [431487, 4, 0.0], [431488, 1, -0.260597], [431489, 2, 0.0], [431490, 1, -6.790101], [431491, 1, 0.085315], [431492, 3, 0.0], [431493, 3, 0.0], [431494, 1, -15.374955], [431495, 1, 0.021979], [431496, 4, 0.0], [431497, 1, -0.029479], [431498, 1, -2.618338], [431499, 2, 0.0]], "notes": "Simulator b244530 unmodified, single process, no sandbox. Both code hashes verified before running. Check values matched for N on 310000-310003. Spread check: first observed rival ask-bid == 2s-1 for all records (mismatches: 0). Per-seed total_edge from engine (rounded to 1e-10 by the simulator). Mean diff -0.405 +/- 0.642."}