{
  "$comment": "样例合同（专题-09 §8.2 四类样例）。每条必须带标注理由：为什么该修/为什么不能改/边界在哪/改了会出什么事。可选 case_card_id 把 Canonical 样例追溯到案例卡。",
  "type": "object",
  "required": ["id", "type", "carrier", "source", "text", "note"],
  "properties": {
    "id": {"type": "string", "minLength": 2},
    "type": {"type": "string", "enum": ["sf", "snf", "boundary", "regression"]},
    "rules": {"type": "array", "items": {"type": "string"}},
    "carrier": {"type": "string", "enum": ["narration", "dialogue", "monologue", "in_text_carrier", "mixed"]},
    "source": {"type": "string", "enum": ["hand_written", "synthetic", "public_domain", "licensed"]},
    "text": {"type": "string", "minLength": 4},
    "note": {"type": "string", "minLength": 4},
    "case_card_id": {"type": "string", "minLength": 2},
    "source_ref": {"type": "string", "minLength": 1},
    "source_license": {"type": "string", "enum": ["owned", "licensed", "public_domain", "synthetic"]}
  }
}