{
  "rollback_stage": "stage_1b",
  "failures": [
    "Verify-ComparisonVisible",
    "Verify-CoreMessage",
    "Verify-DesignStructure",
    "Verify-RenderZone"
  ],
  "reasons": [
    "가시 메시지/관계도/비교 요약이 부족하여 topic 표현 지시를 다시 강화해야 함",
    "overflow가 발생하여 budget/문장 길이/보조 정보 밀도를 재조정해야 함"
  ],
  "mutations": [
    {
      "topic_id": 2,
      "change": "summary",
      "strategy": "core_message_strengthen"
    },
    {
      "topic_id": 3,
      "change": "expression_hint",
      "strategy": "force_relation_diagram_visible"
    },
    {
      "topic_id": 5,
      "change": "expression_hint",
      "strategy": "force_visible_comparison_summary"
    },
    {
      "topic_id": 6,
      "change": "summary",
      "strategy": "strong_footer_conclusion"
    },
    {
      "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"
    }
  ]
}