{
  "schema": "qsp.stage390.assessment-contract.v1",
  "stage": 390,
  "name": "Independent Third-Party Reproduction & Assessment Intake Gate",
  "purpose": "Provide a deterministic and fail-closed interface through which an independent third party can reproduce reviewed QSP verification evidence and submit an assessment result without modifying upstream evidence.",
  "source_stage": 389,
  "assessment_model": {
    "assessor_must_be_independent": true,
    "upstream_evidence_is_read_only": true,
    "reproduction_result_required": true,
    "assessment_result_required": true,
    "machine_readable_result_required": true
  },
  "allowed_assessment_outcomes": [
    "agreement",
    "disagreement",
    "incomplete"
  ],
  "required_reproduction_checks": [
    "upstream_binding",
    "evidence_presence",
    "evidence_hash_integrity",
    "deterministic_verification",
    "fail_closed_behavior",
    "publication_boundary"
  ],
  "success_requirements": {
    "independent_reproduction_completed": true,
    "assessment_result_structurally_valid": true,
    "upstream_binding_verified": true,
    "critical_failure_count": 0
  },
  "non_claims": {
    "external_assessment_completed": false,
    "formal_certification": false,
    "system_wide_formal_acceptance": false,
    "entire_system_quantum_safe": false,
    "stage389_dual_timestamp_verified": false
  },
  "security_policy": {
    "fail_closed": true,
    "private_material_publication_forbidden": true,
    "upstream_evidence_modification_forbidden": true,
    "self_asserted_external_assessment_forbidden": true,
    "false_success_promotion_forbidden": true
  }
}