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simulator b244530ee2a6247b5f930830eeca9dd950da0e7e; default config, 2000 steps, serial chunks of 50. All supplied hashes verified before simulation; four comparator check values match to 6 decimals. Spread observed from first competitor quotes. Aggregates use unrounded engine-returned edges and differences; only per_seed is rounded to 6 decimals. No tuning or strategy edits. Timing covers engine.run including first-quote observation, excludes loading/config sampling and check seeds."}