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Restore recreates an app from its on-drive unit + the guest's own secrets, regenerating nothing. reconcileRestoreSecrets (pure, unit-tested) merges the unit's non-secret env with secrets recovered from the live app.yaml and FAILS CLOSED if a data-encrypting key is unrecoverable (refuse — a PBS whole-guest restore is needed — rather than regenerate and corrupt). Resettable secrets missing → warn + proceed. - backup: RestoreFromRecoveryUnit (manifest -> recover secrets -> gate -> restore volumes -> recreate definition + redeploy w/ re-pull); falls back to volume-only. - seams: RecoverStackSecrets/RecreateStackFromUnit (adapter +encKey), stacks.RedeployFromEnv. Wired into /backup/restore. - tests: gate (refuse/proceed/verbatim) + data_key parsing. Gate + reconcile + data_key parsing unit-tested; capture live-validated (v0.53.1). Full readable-data e2e vs AdventureLog needs the auth-gated dashboard restore — pending. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>