{
  "lesson_id": "MKN-006",
  "lab_id": "MKN-006-LAB1",
  "oracle": "Visible fixture + deterministic gate rules",
  "rules": [
    "Issuer authority is independent of proof syntax.",
    "Credential issuance is separate from mastery.",
    "Revocation/update never rewrites mastery history.",
    "Privacy can preserve evidence by authorized reference.",
    "Changed issuer or format requires a rebuilt mapping."
  ]
}