{
  "declared_after_initial18": true,
  "initial_result": "initial18_result.json",
  "reason": "Monthly retention normal28.96 and cost50=25.09 improve on baseline but may depend on month-end and top3. Diagnose ALL offsets0-10 and hold-rank2/5 with both cash/gold10 under same six stresses. Do not replace frozen primary or original top3 with the highest result.",
  "timing_names": [
    "monthly_buffer_cash"
  ],
  "timing_offsets": [
    0,
    1,
    2,
    3,
    4,
    5,
    6,
    7,
    8,
    9,
    10
  ],
  "hold_rank_controls": [
    2,
    5
  ],
  "defenses": [
    "cash",
    "gold10"
  ]
}