{
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  "record_id": "VXI-EXT-ICE05-GITHUB-PRIVATE-ATTESTATION-LOG-ABSENCE-01-v1",
  "record_kind": "external_reference",
  "title": "GitHub private attestation transparency-log scope",
  "system": "GitHub",
  "evidence_family": "vendor_evidence_review",
  "index_status": "PUBLIC_SAFE_SOURCE_REVIEW",
  "evidence_state": "PRIMARY_DOCUMENTATION_REVIEW_ONLY",
  "canonical_question": "Should a GitHub private-repository attestation be assumed to have the public Sigstore transparency-log evidence?",
  "near_questions": [
    "Are private GitHub attestations recorded in the public log?",
    "Which Sigstore instance signed my GitHub artifact?",
    "Does a private attestation satisfy public transparency policy?",
    "Why might GitHub private attestation evidence have no log inclusion?"
  ],
  "supported_claims": [
    {
      "claim": "GitHub documents different Sigstore instances: public-repository attestations use the public instance, while private-repository attestations use GitHub’s instance without a transparency log. The private instance federates with GitHub Actions.",
      "reliance": "DOCUMENTED_CAPABILITY_ONLY"
    }
  ],
  "not_demonstrated_claims": [
    "Identify the signing instance before requiring or claiming public log inclusion. A private attestation does not satisfy a public-transparency requirement merely because it is signed.",
    "Buyer implementation, live runtime enforcement, settled payment, certification or permission to act are not established.",
    "No expanded capabilities or licences for existing INDEX executables."
  ],
  "public_summary": "GitHub documents different Sigstore instances: public-repository attestations use the public instance, while private-repository attestations use GitHub’s instance without a transparency log. The private instance federates with GitHub Actions.",
  "related_record_ids": [],
  "source_review": {
    "source_type": "official_external_documentation",
    "source_title": "GitHub: Artifact attestations",
    "source_url": "https://docs.github.com/en/actions/concepts/security/artifact-attestations",
    "checked_on": "2026-10-29",
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    "revalidation": "The delivered snapshot preserves the review date shown. Recheck current primary documentation and deployment context before relying on present applicability; payment does not trigger fresh research."
  },
  "answer_policy": {
    "classification": "DOCUMENTED_WITH_DEPLOYMENT_BOUNDARY",
    "bounded_answer": "GitHub documents different Sigstore instances: public-repository attestations use the public instance, while private-repository attestations use GitHub’s instance without a transparency log. The private instance federates with GitHub Actions.",
    "required_buyer_context": "Repository visibility at signing; Signing instance; Attestation evidence; Required transparency policy. Buyer deployment not inspected.",
    "missing_evidence": "A broader claim needs evidence matching the intended use. Payment does not upgrade the evidence state."
  },
  "private_boundary": "Raw logs, thresholds, private paths, source code, protected mechanisms and reconstruction-level details are excluded from public and paid delivery.",
  "decision_profile": {
    "schema": "varexis-vendor-evidence-review/1",
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    "checked_on": "2026-10-29",
    "claim_to_check": "Should a GitHub private-repository attestation be assumed to have the public Sigstore transparency-log evidence?",
    "documented_statement": {
      "status": "documented",
      "statement": "GitHub documents different Sigstore instances: public-repository attestations use the public instance, while private-repository attestations use GitHub’s instance without a transparency log. The private instance federates with GitHub Actions.",
      "source_ids": [
        "github-attestations"
      ]
    },
    "review_inference": {
      "status": "review_inference",
      "statement": "Review github private attestation transparency-log scope before accepting the buyer claim. The existing log review explains transparency evidence generally; this decision determines whether the GitHub private signing environment provides that evidence at all. This is a documentation-review judgment, not an observed deployment outcome.",
      "source_ids": [
        "github-attestations"
      ]
    },
    "buyer_evidence_required": [
      "Repository visibility at signing",
      "Signing instance",
      "Attestation evidence",
      "Required transparency policy"
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    "review_condition": {
      "status": "varexis_review_policy",
      "statement": "Identify the signing instance before requiring or claiming public log inclusion. A private attestation does not satisfy a public-transparency requirement merely because it is signed."
    },
    "unknowns": "Buyer configuration, effective authority, complete usage and final business outcomes were not inspected.",
    "unknown_finding": {
      "status": "unknown",
      "statement": "Buyer configuration, effective authority, complete usage and final business outcomes were not inspected."
    },
    "evidence_sources": [
      {
        "source_id": "github-attestations",
        "url": "https://docs.github.com/en/actions/concepts/security/artifact-attestations",
        "final_url": "https://docs.github.com/en/actions/concepts/security/artifact-attestations",
        "captured_at_utc": "2026-10-29T00:50:20.835247+00:00",
        "status": 200,
        "content_type": "text/html; charset=utf-8",
        "bytes": 298125,
        "sha256": "ca8048d9effb40ff8fca8c399a0407573662f5852b8740beab40dfb2431dc91a",
        "title": "GitHub: Artifact attestations",
        "hash_basis": "SHA-256 of captured HTTP response body bytes",
        "checked_on": "2026-10-29",
        "capture_status": 200,
        "claim_review_completed": true,
        "reviewed_sections": [
          "Sigstore"
        ],
        "version_context": "Rolling official documentation captured 2026-10-29; exact response hash is pinned, not a stable vendor release. Verify the deployed API/version and account feature availability. ",
        "rights_review": "Original factual paraphrase and attributed source metadata only. Captured documentation and code remain private; no source prose, examples, images or vendor marks are redistributed. No licence to vendor software or buyer assurance is granted."
      }
    ],
    "observed_deployment": false,
    "commercial_reliance_boundary": "Source documentation supports only the stated boundary. Existing licensed checkers analyse supported supplied declarations; they do not query these providers, verify live systems, settle payments or certify compliance.",
    "paid_value": {
      "decision_context": "Review github private attestation transparency-log scope before accepting the buyer claim. The existing log review explains transparency evidence generally; this decision determines whether the GitHub private signing environment provides that evidence at all.",
      "free": "Complete review, practical questions, source references and limitations; freely accessible and locally saveable.",
      "single_request": "Unavailable for this publication-only record; historical saved retrieval remains unchanged.",
      "evidence_receipt": "Unavailable for this publication-only record; no new paid retrieval entitlement.",
      "excluded": [
        "Fresh vendor research",
        "Live provider inspection",
        "Runtime enforcement or certification",
        "Expanded executable schemas or licences",
        "Native Coupa, Stripe Issuing, GitLab or Sigstore validation"
      ],
      "integrity": "Hashes identify content versions; they do not prove truth or provide a signature."
    },
    "revalidation": {
      "trigger": "Recheck the source and applicable API, account and configuration before current reliance. No monitoring or fresh research is included.",
      "specific_watch": "Sigstore"
    },
    "buyer_relevance": "Review github private attestation transparency-log scope before accepting the buyer claim. The existing log review explains transparency evidence generally; this decision determines whether the GitHub private signing environment provides that evidence at all.",
    "refusal_conditions": [
      "Identify the signing instance before requiring or claiming public log inclusion. A private attestation does not satisfy a public-transparency requirement merely because it is signed.",
      "Do not infer buyer deployment conformance or successful business outcomes from source documentation."
    ]
  },
  "niche": {
    "niche_id": "ice05-audit",
    "label": "Audit, Provenance & Evidence Accountability",
    "classification_id": "audit",
    "classification_label": "Audit, Provenance & Evidence Accountability",
    "topic_id": "audit",
    "buyer_intent": "Review github private attestation transparency-log scope before accepting the buyer claim. The existing log review explains transparency evidence generally; this decision determines whether the GitHub private signing environment provides that evidence at all.",
    "comparison_role": "supplementary_discovery"
  },
  "paid_access_note": "The full published answer and boundaries are free. Paid access saves the selected route and source versions, with an unsigned receipt when purchased. Preview coverage before paying. Fresh research, bespoke assessment and protected evidence are excluded.",
  "service_route": {
    "request_guide": "/varexis-index/request.html",
    "request_workflow": "/varexis-index/request-workflow.json",
    "service_id": "single_request",
    "service_routes_url": "/varexis-index/service-routes.json",
    "payment_required": true,
    "availability_endpoint": "/api/index/capabilities",
    "operational_status": "AUTOMATIC_SERVICE_CAPABILITIES_GATED",
    "checkout_url": "/index-access"
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  "authority_boundary": "VAREXIS-INDEX informs evidence reliance. It does not provide advice, certification, deployment authority, security assurance, production approval, or guarantee.",
  "human_page": "/varexis-index/catalog.html#github-private-attestation-log-absence",
  "machine_readable_record": "/varexis-index/records/github-private-attestation-log-absence.json"
}