diff --git a/justfile b/justfile
index 4545165..e2dc5af 100644
--- a/justfile
+++ b/justfile
@@ -1,7 +1,7 @@
 # rpi-zigbee-stack — Docker Compose stack management for RPi 3B+
 
 set export
-RPI := "root@192.168.9.147"
+RPI := "root@192.168.81.147"
 COMPOSE := "/root/compose.yaml"
 
 # Default: show stack status
@@ -66,21 +66,35 @@ zb-devices:
 
 # Open Node-RED editor
 nr-editor:
-    xdg-open http://192.168.9.147:1880 2>/dev/null || open http://192.168.9.147:1880 2>/dev/null
+    xdg-open http://192.168.81.147:1880 2>/dev/null || open http://192.168.81.147:1880 2>/dev/null
 
 # Open Node-RED dashboard
 nr-dashboard:
-    xdg-open http://192.168.9.147:1880/ui 2>/dev/null || open http://192.168.9.147:1880/ui 2>/dev/null
+    xdg-open http://192.168.81.147:1880/ui 2>/dev/null || open http://192.168.81.147:1880/ui 2>/dev/null
 
 # ---- Maintenance ----
 
-# Sync compose.yaml and configs to RPi
+# Sync compose.yaml and configs to RPi (backs up live files first)
 sync:
+    ssh {{RPI}} "cp /root/compose.yaml /root/compose.yaml.bak.$$(date +%s) 2>/dev/null || true"
+    ssh {{RPI}} "cp /root/mosquitto/config/mosquitto.conf /root/mosquitto/config/mosquitto.conf.bak.$$(date +%s) 2>/dev/null || true"
+    ssh {{RPI}} "cp /root/zigbee2mqtt/configuration.yaml /root/zigbee2mqtt/configuration.yaml.bak.$$(date +%s) 2>/dev/null || true"
     scp compose.yaml {{RPI}}:/root/compose.yaml
     scp mosquitto.conf {{RPI}}:/root/mosquitto/config/mosquitto.conf
     scp zigbee2mqtt.yaml {{RPI}}:/root/zigbee2mqtt/configuration.yaml
     @echo "Configs synced to RPi. Run 'just restart' to apply."
 
+# Apply boot-resilience hardening (fsck auto-repair, watchdog, stack autostart)
+harden:
+    ssh {{RPI}} "cp /root/harden-boot.sh /root/harden-boot.sh.bak.$$(date +%s) 2>/dev/null || true"
+    scp scripts/harden-boot.sh {{RPI}}:/root/harden-boot.sh
+    scp scripts/kuma-online.sh {{RPI}}:/root/kuma-online.sh
+    ssh {{RPI}} "bash /root/harden-boot.sh"
+
+# Push an immediate "online" heartbeat to Kuma from the RPi
+online:
+    ssh {{RPI}} "bash /usr/local/sbin/kuma-online.sh"
+
 # Full redeploy: sync configs + restart
 redeploy: sync restart