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    "pf": 1.215,
    "dd": 15.05,
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    {
      "name": "V300/exit/p50",
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    {
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  ],
  "meta": {
    "experiment": "exp3 longer proxies alpha engine validation",
    "proxies_tested": [
      "B50",
      "B150",
      "V50",
      "V150",
      "V300"
    ],
    "modes_tested": [
      "gate",
      "size"
    ],
    "note": "Top-2 per proxy from fast sweep, validated with full Alpha Engine"
  }
}