{
  "key": "d5-s23-cancel-size-cut",
  "idea": "On exactly-one-tick rival retreats, scale new orders on that side instead of RC cancel-and-suppress; spreads 2 and 3.",
  "approach": "Replace only RC retreat wrapper. Preserve underlying cancellations and bookkeeping; add no retreat cancellations. Scale every new order on the retreat side by f during cooldown, floored at the simulator minimum lot of 0.01 shares. Repeated retreats restart cooldown, including the triggering callback. Select on target-spread tuning paired mean; freeze before one holdout. Off-target actions unchanged.",
  "tried": [
    {
      "name": "f025_c1",
      "code_sha256": "e7aa26078c4227bdae6c462bf982c57f600fcf91dbd94fb823874f129fbbf49a",
      "mean_diff": -0.41097498356509404,
      "se": 0.23253963632058192,
      "n": 106,
      "scope": "target spreads 2 and 3; tuning"
    },
    {
      "name": "f025_c2",
      "code_sha256": "9974c0c38a8b378357903b0b2e54d0126c000d72ef161eab97e1c31bb739174e",
      "mean_diff": -0.40349573248490606,
      "se": 0.2332606608383761,
      "n": 106,
      "scope": "target spreads 2 and 3; tuning"
    },
    {
      "name": "f05_c1",
      "code_sha256": "5459b6eb3f642bc837bd9bc928fa0dca6752cacdaaa4e175dc3438f58a260368",
      "mean_diff": -0.49974512887924266,
      "se": 0.1691546705113386,
      "n": 106,
      "scope": "target spreads 2 and 3; tuning"
    },
    {
      "name": "f05_c2",
      "code_sha256": "26c3aa1a0e41a710f0e8319d250f7f6350ce35ead0a9e7d486f128082297c385",
      "mean_diff": -0.5731557981330196,
      "se": 0.19754936275589827,
      "n": 106,
      "scope": "target spreads 2 and 3; tuning"
    }
  ],
  "next": "Retain RC. This screen does not establish a target-spread gain exceeding twice its standard error. No promotion; finalist seeds 900000..903999 untouched.",
  "code": 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      "start": 330000,
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    "selected": "f025_c2",
    "selection_metric": "Highest paired mean on pooled spreads 2 and 3",
    "n": 200,
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    {
      "stage": "Initial tuning attempt before minimum-lot repair",
      "seed": 330001,
      "strategy": "f025_c1",
      "error": "orderbook_pm_challenge.market.OrderBookError: quantity must be positive after rounding",
      "resolution": "Restarted all four variants and RC on the full tuning seed range after flooring scaled quantities at 0.01. Initial aborted attempt excluded from statistics. No changes after freeze."
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    {
      "stage": "Tool setup",
      "error": "System git and /usr/bin/python3 failed: missing xcrun active developer path.",
      "resolution": "Fetched pinned source archive via HTTPS and used available Homebrew Python 3.11.14."
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    "wrapper_tests": "Passed all four variants: exact one-tick detection, both sides, side-specific scaling, cooldown expiry, minimum lot, unchanged normal cancels and bookkeeping, off-target identity.",
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    "finalist_seeds_used": false,
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}