{
  "schema": "fenrua.legacy-verification-scenario.v1",
  "result": "SIGNATURE_INVALID",
  "inputFixture": "examples/signature-invalid.fixture.json",
  "trigger": "Signature is missing, malformed, expired, revoked, or not made by the declared authority.",
  "evidenceSupplied": ["manifest", "signature"],
  "evidenceAbsent": ["validSignature"],
  "safetyConsequence": "The scenario records a signature failure; no authorisation decision is expressed.",
  "humanReviewRequired": true
}