{
  "rollback_stage": "stage_1_5b",
  "failures": [
    "Verify-RenderZone"
  ],
  "reasons": [
    "overflow가 발생하여 budget/문장 길이/보조 정보 밀도를 재조정해야 함"
  ],
  "mutations": [
    {
      "role": "배경",
      "change": "budget",
      "strategy": "compress_visible_copy"
    },
    {
      "role": "결론",
      "change": "budget",
      "strategy": "compress_visible_copy"
    },
    {
      "area": "body_bg",
      "change": "verification",
      "strategy": "reduce_density_and_split_visibility"
    },
    {
      "area": "body_core",
      "change": "verification",
      "strategy": "reduce_density_and_split_visibility"
    }
  ]
}