{"key":"s4-norisk-a","idea":"Measure frozen remove-s4-ask-risk-premium against frozen N; remove only the spread-4 1.4x ask-loss risk premium in ask 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tuning or code changes. Unmodified simulator at b244530ee2a6247b5f930830eeca9dd950da0e7e; default ChallengeConfig and ParameterVariance, 2000 steps. Single process; no workers or sandbox. Both code hashes verified before checks and every chunk. Each first rival quote width matched 2s-1. Every seed has exactly one successful record per strategy. Statistics use unrounded edge differences; per_seed rounded to six decimals. seconds_per_simulation averages the 1000 measured runs, excluding checks."}