Historical erasure-failure isolation regression

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{
  "schemaVersion": 1,
  "publicSummaryVersion": "2026-09-30",
  "classification": "PUBLIC",
  "title": "Historical erasure-failure isolation regression",
  "summary": "A regression run on 7 September 2026, sealed in the 8 September record, verified that a session with destroyed account key material could not resume while another account’s session resumed immediately afterward without restarting the service. The earlier reported service failure was traced to an invalid test request, not damage to the service. This was an isolated engine test on hosted hardware. It did not exercise the production account-deletion route, which requires its separate canary evidence.",
  "date": "7 September 2026",
  "scope": "Historical record; any production observation is limited to the dated test described below.",
  "result": "A regression run on 7 September 2026, sealed in the 8 September record, verified that a session with destroyed account key material could not resume while another account’s session resumed immediately afterward without restarting the service. The earlier reported service failure was traced to an invalid test request, not damage to the service. This was an isolated engine test on hosted hardware. It did not exercise the production account-deletion route, which requires its separate canary evidence.",
  "sections": [],
  "currentDeployment": "Not independently verified by this historical evidence.",
  "canonical": "/evidence/phase-b37"
}

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SHA-256 47b3b86414279376a3aaf1c568da6239523c3cb911b51d21bd4ac573fd17cd26