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    [702974, 2, 0.496185],
    [702975, 4, 0.000000],
    [702976, 2, -0.030135],
    [702977, 3, 0.780462],
    [702978, 2, 0.455506],
    [702979, 2, 1.337247],
    [702980, 3, 1.191101],
    [702981, 1, 0.000000],
    [702982, 3, 2.081077],
    [702983, 4, 0.000000],
    [702984, 1, 0.000000],
    [702985, 3, 0.178371],
    [702986, 2, 10.443630],
    [702987, 2, 0.112715],
    [702988, 1, 0.000000],
    [702989, 2, -0.210455],
    [702990, 3, 20.412904],
    [702991, 3, 0.581304],
    [702992, 3, 3.959294],
    [702993, 3, 3.367635],
    [702994, 1, 0.000000],
    [702995, 2, -0.117785],
    [702996, 4, 0.000000],
    [702997, 3, 0.644550],
    [702998, 4, 0.000000],
    [702999, 1, 0.000000]
  ],
  "seconds_per_simulation": 1.357446529434761,
  "notes": [
    "Simulator revision b244530ee2a6247b5f930830eeca9dd950da0e7e, downloaded from its pinned GitHub archive; simulator files verified byte-for-byte against the archive.",
    "All BASE, N, RC and CANDIDATE UTF-8 code SHA-256 hashes match the brief. RC starts with exact N text; CANDIDATE is BASE plus the exact remaining RC suffix. No strategy edits or tuning.",
    "Seeds are inclusive. For each seed, runner.sample_config(ChallengeConfig(), ParameterVariance(), seed=s) supplies one shared configuration. BASE runs before CANDIDATE, serially in-process without sandbox or workers. loader.load_strategy_factory is called separately before every SimulationEngine(cfg, factory, seed=s).run(), creating a fresh strategy.",
    "d = CANDIDATE.total_edge - BASE.total_edge; spread = cfg.competitor.spread_ticks. Aggregate statistics and worst/best use unrounded d; per_seed numbers have six decimal places. se is sample standard deviation (ddof=1) divided by sqrt(n), over successful pairs. retail_diff and arb_diff are mean paired component differences. check_values map the first four seeds to BASE total_edge.",
    "seconds_per_simulation is the mean elapsed wall time for each strategy load plus SimulationEngine construction and run, excluding downloads, configuration sampling, aggregation and validation.",
    "Numerical findings are direct measurements from this block, not historical artifact performance claims."
  ]
}