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Spike-proven that backup/restore-to-PBS reuse Phase A unchanged; the only new code is the verify capability, a small PBS-API client, and PBSSnapshot reporting. - internal/pbs: fingerprint-pinned, token-authed PBS-API client (Verify/Snapshots/ TaskStatus, node-from-UPID; secret read from /etc/pve/priv/storage/<id>.pw at runtime, never logged) + the verify maintenance loop (own cadence, default 6h, NOT gated/journaled, like the watchdog) + SnapshotStore. - hub: PBSSnapshot filled (namespace/type/id/time/size/owner/protected/encrypted/ verify_state/verify_upid); PBSReporter collector seam; cross-repo golden + bidirectional key-set tests; hub handler parses pbs_snapshots + logs a failed-verify WARN. - backup: report the ACTUAL vzdump mode (parsed from the task log; PVE may downgrade snapshot->stop). proxmox.Storage.Username. config PBSVerifyCadence/secret-dir. --selftest=pbs-verify. Backup/restore-to-PBS unchanged. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>