{
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  "generated_at_utc": "2026-10-14T01:25:58.088Z",
  "record_id": "VXI-EXT-PROCUREMENT-MONGODB-RESUME-01-v1",
  "record_kind": "external_reference",
  "title": "MongoDB change streams: Resume tokens and retained history",
  "system": "MongoDB change streams",
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  "canonical_question": "Does storing a change-stream resume token guarantee recovery after any outage?",
  "near_questions": [
    "Does a resume token guarantee replay after any outage?",
    "What if the required oplog history has expired?",
    "Can collection invalidation change how a stream restarts?",
    "Does reconnecting prove every downstream event was processed?",
    "Which saved position should a recovery review identify?",
    "How does history retention constrain change-stream continuity?",
    "What evidence supports a no-missed-events claim?",
    "Can an agent infer complete replay from a valid token format?",
    "What should procurement ask about event-feed recovery?",
    "Which reconciliation outcome should be retained?",
    "Can I save the documented change-stream boundary?",
    "When should outage recovery assumptions be retested?"
  ],
  "supported_claims": [
    {
      "claim": "No. MongoDB requires enough oplog history to locate the relevant operation. Invalidation also affects how a stream can restart. A saved token is a position reference, not a guarantee that the required history still exists or every downstream event was processed.",
      "reliance": "DOCUMENTED_CAPABILITY_ONLY"
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  "public_summary": "No. MongoDB requires enough oplog history to locate the relevant operation. Invalidation also affects how a stream can restart. A saved token is a position reference, not a guarantee that the required history still exists or every downstream event was processed.",
  "related_record_ids": [
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    "source_type": "official_external_documentation",
    "source_title": "MongoDB change stream resume history requirements",
    "source_url": "https://www.mongodb.com/docs/manual/changeStreams/",
    "checked_on": "2026-10-14",
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  "answer_policy": {
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    "bounded_answer": "No. MongoDB requires enough oplog history to locate the relevant operation. Invalidation also affects how a stream can restart. A saved token is a position reference, not a guarantee that the required history still exists or every downstream event was processed.",
    "required_buyer_context": "Stream scope, saved token, outage duration, oplog availability and invalidation events.",
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  "decision_profile": {
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    "claim_to_check": "A resume token guarantees complete replay after an arbitrary interruption.",
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      "status": "documented",
      "statement": "No. MongoDB requires enough oplog history to locate the relevant operation. Invalidation also affects how a stream can restart. A saved token is a position reference, not a guarantee that the required history still exists or every downstream event was processed.",
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    "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": [
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        "source_id": "mongo-resume",
        "url": "https://www.mongodb.com/docs/manual/changeStreams/",
        "final_url": "https://www.mongodb.com/docs/manual/changestreams/",
        "title": "MongoDB change stream resume history requirements",
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      "evidence_receipt": "The same snapshot plus the existing unsigned delivery receipt.",
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        "Testing the buyer configuration",
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      "integrity": "Hashes identify content versions; they do not prove truth or provide a signature."
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    "revalidation": {
      "trigger": "A saved purchase does not recheck the source or buyer configuration.",
      "specific_watch": "Recheck retention, stream configuration and recovery procedures."
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  "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.",
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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.",
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