Deleting one session makes its saved content unreadable

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{
  "schemaVersion": 1,
  "publicSummaryVersion": "2026-09-30",
  "classification": "PUBLIC",
  "title": "Deleting one session makes its saved content unreadable",
  "summary": "The per-session deletion record dated 4 October 2026 reports fourteen passing test assertions on the laboratory platform, with none left unproven. After one session was deleted, the content only that session held could not be read from any of its checkpoints or backup copies, while the account's other sessions stayed readable and could still resume. Two deliberately broken controls, one that skipped the deletion and one that deleted too much, each failed as they should. Sessions saved in the older format must be re-sealed before they can be deleted one at a time. Production deployment followed on 6 October 2026 and is not part of this record.",
  "date": "4 October 2026",
  "scope": "Historical record; any production observation is limited to the dated test described below.",
  "result": "Fourteen of fourteen assertions passed and both broken controls were caught. A deleted session's own content was unreadable from every copy, and the account's other sessions were untouched. Older-format sessions need a re-seal first; production deployment is outside this record.",
  "sections": [],
  "currentDeployment": "Not independently verified by this historical evidence.",
  "canonical": "/evidence/phase-er-1s"
}

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SHA-256 d7d074174bef18483c93a1c266b86fae71fb6f1af0db60456e670f42f7e4e5a9