{
  "schema": "varexis-public-evidence-record/0.3",
  "generated_at_utc": "2026-10-16T02:40:06.177Z",
  "record_id": "VXI-EXT-PROCUREMENT-S3-LOG-COMPLETENESS-01-v1",
  "record_kind": "external_reference",
  "title": "S3 access logs: Missing records do not establish no request",
  "system": "Amazon S3",
  "evidence_family": "vendor_evidence_review",
  "index_status": "PUBLIC_SAFE_SOURCE_REVIEW",
  "evidence_state": "PRIMARY_DOCUMENTATION_REVIEW_ONLY",
  "canonical_question": "Can S3 server access logs prove that every request was recorded exactly once?",
  "near_questions": [
    "Are S3 server logs delivered exactly once?",
    "Can a request record arrive late?",
    "Can server logging omit a request?",
    "Does a usage report necessarily match the log count?",
    "What happens while a logging destination changes?",
    "How should duplicate records be handled?",
    "Does an empty interval prove no bucket access?",
    "Which configuration was active at the time?",
    "What evidence supports a specific request investigation?",
    "Can these logs establish exact billing independently?",
    "When should absence remain inconclusive?",
    "Can I save an S3 logging limitation review?"
  ],
  "supported_claims": [
    {
      "claim": "S3 describes server access logging as best effort, with neither completeness nor timeliness guaranteed. Records can arrive late, be duplicated or be absent. These logs support traffic review, but a missing entry alone cannot establish that a request never occurred.",
      "reliance": "DOCUMENTED_CAPABILITY_ONLY"
    }
  ],
  "not_demonstrated_claims": [
    "Verified buyer configuration or effective access rights",
    "Independent execution, completeness or security testing",
    "Vendor certification, legal compliance or guaranteed suitability"
  ],
  "public_summary": "S3 describes server access logging as best effort, with neither completeness nor timeliness guaranteed. Records can arrive late, be duplicated or be absent. These logs support traffic review, but a missing entry alone cannot establish that a request never occurred.",
  "related_record_ids": [
    "VXI-EXT-PROCUREMENT-ENTRA-RETENTION-01-v1",
    "VXI-EXT-PROCUREMENT-NOTION-AGENT-AUDIT-01-v1",
    "VXI-EXT-PROCUREMENT-GITLAB-AUDIT-DEDUPE-01-v1",
    "VXI-EXT-PROCUREMENT-CLOUDTRAIL-VALIDATION-01-v1",
    "VXI-EXT-PROCUREMENT-GCP-SINK-EXCLUSIONS-01-v1"
  ],
  "source_review": {
    "source_type": "official_external_documentation",
    "source_title": "S3 server access log delivery",
    "source_url": "https://docs.aws.amazon.com/AmazonS3/latest/userguide/ServerLogs.html",
    "checked_on": "2026-10-16",
    "candidate_record_id": "VXI-EXT-PROCUREMENT-S3-LOG-COMPLETENESS-01-v1",
    "candidate_record_sha256": "4ae8264ef5f9c2e8806efd64e500578bf8c511d4d9bb1d81107509d696e38bbd",
    "method": "Primary documentation reviewed for the published bounded statement.",
    "deployment_tested_by_varexis": false,
    "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": "S3 describes server access logging as best effort, with neither completeness nor timeliness guaranteed. Records can arrive late, be duplicated or be absent. These logs support traffic review, but a missing entry alone cannot establish that a request never occurred.",
    "required_buyer_context": "Amazon S3: Logging state, destination changes, delivery delay and independent request evidence; buyer configuration and operational evidence are required.",
    "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",
    "review_status": "documentation_review_only",
    "checked_on": "2026-10-16",
    "claim_to_check": "Server access logs are a complete, timely, exactly-once request ledger.",
    "documented_statement": {
      "status": "documented",
      "statement": "S3 describes server access logging as best effort, with neither completeness nor timeliness guaranteed. Records can arrive late, be duplicated or be absent. These logs support traffic review, but a missing entry alone cannot establish that a request never occurred.",
      "source_ids": [
        "s3-log-delivery"
      ]
    },
    "buyer_evidence_required": [
      "Logging configuration and destination history.",
      "Observed delivery delays and duplicate handling.",
      "Additional evidence for any claim based on a missing request."
    ],
    "review_condition": {
      "status": "varexis_review_policy",
      "statement": "Do not infer no access solely from an absent server access-log record."
    },
    "unknowns": "The buyer configuration, contract, effective entitlement and operational evidence have not been inspected. Missing evidence does not establish absence or failure of the feature.",
    "evidence_sources": [
      {
        "source_id": "s3-log-delivery",
        "url": "https://docs.aws.amazon.com/AmazonS3/latest/userguide/ServerLogs.html",
        "final_url": "https://docs.aws.amazon.com/AmazonS3/latest/userguide/ServerLogs.html",
        "title": "S3 server access log delivery",
        "checked_on": "2026-10-16",
        "sha256": "82b297d302f1f0320cee0518f808bce2a7184859dff71985b391e7acc2c1db55",
        "bytes": 19927
      }
    ],
    "observed_deployment": false,
    "commercial_reliance_boundary": "Procurement evidence support only; no supplier clearance, legal conclusion, configuration audit or verification of the buyer's claim is supplied.",
    "paid_value": {
      "decision_context": "Retain the completeness boundary behind a bucket-access investigation.",
      "free": "Complete review, practical questions, sources and limitations; may be saved locally.",
      "single_request": "Existing server-saved version-bound route snapshot for later authenticated retrieval.",
      "evidence_receipt": "The same snapshot plus the existing unsigned delivery receipt.",
      "excluded": [
        "Fresh vendor research",
        "Continuous monitoring or change alerts",
        "Testing the buyer configuration",
        "Private evidence or vendor certification"
      ],
      "integrity": "Hashes identify content versions; they do not prove truth or provide a signature."
    },
    "revalidation": {
      "trigger": "A saved purchase does not recheck the source or buyer configuration.",
      "specific_watch": "Logging state, destination changes, delivery delay and independent request evidence"
    }
  },
  "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"
  },
  "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#s3-access-log-best-effort-boundary",
  "machine_readable_record": "/varexis-index/records/s3-access-log-best-effort-boundary.json"
}