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    [
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  ],
  "worst_seeds": [
    {
      "seed": 900146,
      "s": 1,
      "d": -98.548693
    },
    {
      "seed": 900268,
      "s": 2,
      "d": -32.155972
    },
    {
      "seed": 900120,
      "s": 1,
      "d": -24.450157
    },
    {
      "seed": 900425,
      "s": 3,
      "d": -14.950068
    },
    {
      "seed": 900138,
      "s": 2,
      "d": -13.08245
    }
  ],
  "notes": "Frozen MA versus N, unchanged UTF-8 strategy bytes verified before execution. Simulator commit b244530ee2a6247b5f930830eeca9dd950da0e7e unmodified; default ChallengeConfig and ParameterVariance, 2000 steps. Serial in-process execution, fresh strategy per simulation, no sandbox or workers. All four comparator checks passed before measurement. Ten chunks of 50 seeds; each seed sampled using runner.sample_config. Spread obtained from actual initial rival quotes. Aggregates use unrounded differences; per_seed and worst_seeds differences rounded to six decimals. Timing is mean engine.run wall time for the 1000 measurement simulations, excluding checks and setup. No tuning or other seeds used. This block alone does not establish promotion on all 4000 finalist seeds."
}