Continuous watchdog plus offline-protected tamper events
Anchor's permission watchdog (Layer 01) runs continuously on the child device and watches for revocation attempts on the Accessibility Service permission, the Usage Access permission, the Device Admin grant, and the Notification access. Those are the four permissions Anchor relies on for enforcement. When a revocation is attempted, the watchdog detects it within seconds and re-prompts the child to restore. The kid cannot complete the toggle silently while the device is online.
Anchor's offline tamper queue (Layer 04) handles the case where the device is offline at the moment of the revocation attempt. The tamper event is timestamped locally with the actual time of the attempt and queued in tamper-protected storage. When the device reconnects, the queue flushes to the parent activity feed with the original timestamps preserved. The parent sees a revocation attempted at 9:47 p.m. even if the device only came back online at 10:23 p.m.
The two layers in concert close the route at both ends. Revocation cannot succeed silently while online (watchdog catches it). Revocation cannot succeed silently while offline (tamper queue surfaces it on reconnect). The parent sees the attempt. The kid does not trade time for invisibility.
Verdict: Holds