The controller honors an operator-enforced minimum version (FLOOR) on the hub
report ACK and auto-updates to the floor when below it (managed default, no click),
reusing the Phase 1 in-guest-pull + agent-swap + rollback. Latest stays the opt-in
button; the floor is the auto-target, never latest.
- pusher.go: PushResponse += min_controller_version, latest_version (existing ACK seam)
- main.go: OnPushResponse → updater.SetFloor + MaybeAutoUpdate (rides report cycle)
- updater.go: SetFloor/GetFloor + MaybeAutoUpdate reusing performUpdate (auto-floor);
no-op at/above floor, floor>latest, dev/no-agent/backup; no flap (in-mem+persisted)
- settings UI (HU): floor display + auto restart-poll during an auto-update
- tests: below/at/floor>latest/no-flap/raised-floor; below-floor red-proof verified
- no agent change (reuses Phase 1 POST /controller/swap)
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FSZmmSFVzGwEzhYmxbkgBK
