{
  "key": "s4-fresh-4",
  "idea": "Measure-only fresh-seed replication of B_RC4 versus B_RC; add rival-retreat cancellation on spread 4 only.",
  "candidate_sha256": "27cef4140f19ecf15aeaa82c8a4bc70f9f066083a5bed10bcb963d8ecbb9b8aa",
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  "missing_seeds": [],
  "failures": [],
  "check_values": [
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  "off_target_zero": true,
  "notes": "Unmodified simulator b244530ee2a6247b5f930830eeca9dd950da0e7e; default ChallengeConfig/ParameterVariance, 2000 steps, one process, 10 chunks of 50. All supplied code hashes and RC metadata hash verified before runs. Spread from first callback quotes. Differences and statistics use engine-returned edges without additional rounding; per_seed is rounded to 6 decimals. se uses sample sd/sqrt(n). Timings include only engine.run and exclude check seeds. No tuning or finalist seeds used."
}