{"key":"s4-fresh-5","idea":"Measure-only replication: B_RC4 (spread-4 retreat variant) vs B_RC on fresh seeds 932000..932499; only spread 4 may 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ed":932214,"s":4,"d":-12.087364,"candidate_edge":394.770875,"comparator_edge":406.858239},{"seed":932096,"s":4,"d":-11.041895,"candidate_edge":-364.221957,"comparator_edge":-353.180062},{"seed":932118,"s":4,"d":-9.716133,"candidate_edge":568.759806,"comparator_edge":578.475939},{"seed":932308,"s":4,"d":-7.662084,"candidate_edge":-207.372522,"comparator_edge":-199.710439},{"seed":932334,"s":4,"d":-5.605231,"candidate_edge":140.470021,"comparator_edge":146.075252},{"seed":932187,"s":4,"d":-3.241869,"candidate_edge":222.277669,"comparator_edge":225.519538},{"seed":932089,"s":4,"d":-2.821517,"candidate_edge":1037.607552,"comparator_edge":1040.429069},{"seed":932223,"s":4,"d":-2.738803,"candidate_edge":156.215019,"comparator_edge":158.953821},{"seed":932267,"s":4,"d":-2.137919,"candidate_edge":737.934623,"comparator_edge":740.072542}],"off_target_zero":true,"notes":"All 500 seeds run, both strategies, same seed, 2000 steps, default config, unmodified simulator at b244530, single process. SHA-256 of MB, B_RC, B_RC4 verified. K check values match B_RC's exactly. Overall mean d -0.1472 (se 0.1174); spread 4 (n=119) mean d -0.6186 (se 0.4925). d is exactly 0 on spreads 1-3: True. s equals sampled spread_ticks on every seed. No tuning, no code changes."}