{
  "$comment": "规则合同（专题-09 §4.1）。active 规则必须配齐四类样例，由 load.py 强制，不在 schema 内表达。",
  "type": "object",
  "required": ["id", "name", "layer", "carrier_scope", "trigger", "default_disposition", "fix_hint", "samples", "version", "status", "evidence"],
  "properties": {
    "id": {"type": "string", "minLength": 2},
    "name": {"type": "string", "minLength": 2},
    "layer": {"type": "string", "enum": ["mechanical", "lexical", "structural", "density", "semantic"]},
    "carrier_scope": {"type": "string", "enum": ["narration", "dialogue", "monologue", "in_text_carrier", "all"]},
    "trigger": {
      "type": "object",
      "required": ["type"],
      "properties": {
        "type": {"type": "string", "enum": ["regex", "handler", "density", "model_judgment"]},
        "pattern": {"type": "string"},
        "criteria": {"type": "string"},
        "handler": {"type": "string", "enum": ["short_sentence_run", "repeated_sentence_start", "camera_action_list", "uniform_paragraph_length"]},
        "max_chars": {"type": "integer", "minimum": 1},
        "min_run": {"type": "integer", "minimum": 2},
        "window_chars": {"type": "integer", "minimum": 50},
        "min_hits": {"type": "integer", "minimum": 2},
        "tolerance": {"type": "integer", "minimum": 1, "maximum": 50}
      }
    },
    "carve_out": {"type": "array", "items": {"type": "string"}},
    "default_disposition": {"type": "string", "enum": ["blocking", "candidate", "advisory"]},
    "function_check": {"type": "array", "items": {"type": "string"}},
    "fix_hint": {"type": "string", "minLength": 2},
    "samples": {
      "type": "object",
      "required": ["sf", "snf", "boundary", "regression"],
      "properties": {
        "sf": {"type": "array", "items": {"type": "string"}},
        "snf": {"type": "array", "items": {"type": "string"}},
        "boundary": {"type": "array", "items": {"type": "string"}},
        "regression": {"type": "array", "items": {"type": "string"}}
      }
    },
    "version": {"type": "integer"},
    "status": {"type": "string", "enum": ["candidate", "active", "deprecated"]},
    "evidence": {"type": "string", "minLength": 2},
    "case_card_ids": {"type": "array", "items": {"type": "string", "minLength": 2}}
  }
}