{
  "spec_version": 1,
  "domain": "duplication",
  "rules": [
    {
      "id": "R-DUP-HASH-GROUP",
      "title": "包内内容指纹重复",
      "severity": "HIGH",
      "matcher": {},
      "mechanical": [{"check": "dup_hash_group", "issue_kind": "dup_content"}],
      "llm": [
        {
          "check": "merge_or_keep",
          "question": "同指纹成员是否应合并为一个节点（保留最新、其余合并计数）？给出可合并子集与理由；若属刻意的多副本（不同 session/分支）则说明保留理由。",
          "expect": "可合并子集 或 保留理由"
        }
      ],
      "remedy": "合并（merge；受保护节点须剔除）"
    }
  ]
}