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  ],
  "notes": "Frozen strategies; both UTF-8 SHA-256 hashes verified before each chunk. Unmodified simulator b244530ee2a6247b5f930830eeca9dd950da0e7e; default ChallengeConfig and ParameterVariance; 2000 steps; serial, unsandboxed. Each simulation uses a fresh loaded strategy and checks initial rival quote width. Four N reference checks match at six decimals. Statistics use unrounded edges; retail_diff and arb_diff are paired means. This block alone does not promote a strategy."
}