diff --git a/esphome/esp-officeduallights.yaml b/esphome/esp-officeduallights.yaml
index 54c2ee7..11de242 100644
--- a/esphome/esp-officeduallights.yaml
+++ b/esphome/esp-officeduallights.yaml
@@ -6,6 +6,8 @@
 # https://home.fox.co.nz/gitea/zorruno/zorruno-homeassistant/src/branch/master/esphome/esp-officeduallights.yaml
 #:########################################################################################:#
 # VERSIONS:
+# V3.0 2026-09-12 Makes HA the primary Office synchronizer. Direct MQTT peer synchronization
+#                 runs only while HA's native API state subscription is disconnected.
 # V2.9 2026-08-16 Makes this physical relay the sole overhead status authority. Removes the
 #                 bidirectional shared retained-status topic that could chatter during reconnects.
 # V2.8 2026-07-25 Added 2-way MQTT sync with esp-officelights (office main lightswitch).
@@ -93,7 +95,7 @@ substitutions:
 
   # Project Naming
   project_name: "Sonoff Technologies.Sonoff Dual R1"
-  project_version: "v2.9"
+  project_version: "v3.0"
 
   # Passwords and Secrets
   api_key: !secret esp-api_key
@@ -311,16 +313,19 @@ mqtt:
 
             id(relay_2_timer_script)->execute(timer_seconds * 1000);
 
-    # Mirror remote bunker command from esp-officelights onto light_1, but only if a real
-    # state change is needed. Do not republish the command from here. Relay status is
-    # published by the relay callback below.
+    # MQTT peer synchronization is the HA-down fallback. When HA is connected it is the
+    # sole synchronizer, so remote MQTT commands must not change either physical relay.
     - topic: "${mqtt_mainlight_command_bunker}"
       payload: "${mqtt_command_on}"
       then:
         - script.stop: relay_1_timer_script
         - if:
             condition:
-              lambda: "return !id(relay_1).state;"
+              and:
+                - not:
+                    api.connected:
+                      state_subscription_only: true
+                - lambda: "return !id(relay_1).state;"
             then:
               - light.turn_on: light_1
 
@@ -330,19 +335,25 @@ mqtt:
         - script.stop: relay_1_timer_script
         - if:
             condition:
-              lambda: "return id(relay_1).state;"
+              and:
+                - not:
+                    api.connected:
+                      state_subscription_only: true
+                - lambda: "return id(relay_1).state;"
             then:
               - light.turn_off: light_1
 
-    # Mirror remote overhead command from esp-officelights onto light_2, but only if a real
-    # state change is needed.
     - topic: "${mqtt_mainlight_command_overhead}"
       payload: "${mqtt_command_on}"
       then:
         - script.stop: relay_2_timer_script
         - if:
             condition:
-              lambda: "return !id(relay_2).state;"
+              and:
+                - not:
+                    api.connected:
+                      state_subscription_only: true
+                - lambda: "return !id(relay_2).state;"
             then:
               - light.turn_on: light_2
 
@@ -352,7 +363,11 @@ mqtt:
         - script.stop: relay_2_timer_script
         - if:
             condition:
-              lambda: "return id(relay_2).state;"
+              and:
+                - not:
+                    api.connected:
+                      state_subscription_only: true
+                - lambda: "return id(relay_2).state;"
             then:
               - light.turn_off: light_2