{
  "schema": "MKN-020-LAB_RULES_v1",
  "positive_ceiling": "TAXONOMY_REVIEW_REQUIRED",
  "rules": [
    "stable semantic event name",
    "required timestamps and version evidence",
    "privacy/cardinality explicit",
    "migration provenance on semantic rename/replay",
    "raw event cannot prove mastery",
    "provenance required"
  ]
}