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f17e1979bd
gates / gates (push) Successful in 49s
Each successful run prunes its tier, so a compromised controller calling POST /backup in a loop pushed out every pre-compromise restore point. A tier with a cadence of at most 24 h now allows 3 successful runs per rolling 24 h (night, a press, the next night); a longer tier 1 per max(cadence - 24 h, cadence/2), 6 days for the weekly off-site tier. Only successes count. A refusal is a 429, a WARN, saved, and for 24 h a critical host-report status that the hub turns into its existing operator-only agent_capability_degraded event. The success history and the refusal are kept in the R-894 state file, so a restart does not reset the cap. No sudoers change. Tests TestBackupCap_* and the state, status and wiring tests, red-proved.