diff --git a/app/api/ansible.py b/app/api/ansible.py
index 0963237..342e1d9 100644
--- a/app/api/ansible.py
+++ b/app/api/ansible.py
@@ -37,9 +37,10 @@ def get_inventory_raw():
 
 @ansible_bp.route('/inventory/sync', methods=['POST'])
 def sync_inventory():
-    """Sync all active app devices into monitoring_devices inventory group"""
+    """Sync all active app devices into monitoring_devices and wmt_clients inventory groups"""
     try:
         result = ansible_service.sync_devices_to_inventory()
+        ansible_service.sync_wmt_devices_to_inventory()
         status = 200 if result.get('success') else 400
         return jsonify(result), status
     except Exception as e:
@@ -116,6 +117,7 @@ def refresh_inventory():
     """Refresh Ansible inventory from database (legacy alias for /sync)"""
     try:
         result = ansible_service.sync_devices_to_inventory()
+        ansible_service.sync_wmt_devices_to_inventory()
         return jsonify(result), 200 if result.get('success') else 400
     except Exception as e:
         logging.error(f"Error refreshing inventory: {e}")
diff --git a/app/services/ansible_service.py b/app/services/ansible_service.py
index 4e6f908..e39ad36 100644
--- a/app/services/ansible_service.py
+++ b/app/services/ansible_service.py
@@ -174,6 +174,52 @@ class AnsibleService:
             logging.error(f"Error syncing devices to inventory: {e}")
             return {'success': False, 'error': str(e)}
 
+    def sync_wmt_devices_to_inventory(self) -> Dict:
+        """Sync all active WMT-enabled devices into the wmt_clients inventory group.
+        Only devices that have checked in via the WMT client API (wmt_last_seen IS NOT NULL)
+        are included. Preserves all other inventory groups."""
+        try:
+            data = self._read_inventory()
+            children = data['all'].setdefault('children', {})
+            children['wmt_clients'] = {'hosts': {}}
+            synced = 0
+            with self.db.get_session() as session:
+                devices = (
+                    session.query(Device)
+                    .filter(Device.status == 'active',
+                            Device.wmt_last_seen.isnot(None))
+                    .all()
+                )
+                settings = self.load_settings()
+                use_password = settings.get('use_password_auth', False)
+                ssh_password = settings.get('ssh_fallback_password', '')
+                for device in devices:
+                    if device.device_ip == '127.0.0.1' or device.hostname == 'localhost':
+                        hvars = {'ansible_connection': 'local', 'ansible_host': '127.0.0.1'}
+                    elif use_password and ssh_password:
+                        hvars = {
+                            'ansible_host': device.device_ip,
+                            'ansible_user': 'pi',
+                            'ansible_password': ssh_password,
+                            'ansible_become_password': ssh_password,
+                            'ansible_ssh_common_args': '-o PubkeyAuthentication=no -o PreferredAuthentications=password -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null'
+                        }
+                    else:
+                        hvars = {
+                            'ansible_host': device.device_ip,
+                            'ansible_user': 'pi',
+                            'ansible_ssh_private_key_file': str(self.ssh_key_path.resolve()),
+                            'ansible_ssh_common_args': '-o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null'
+                        }
+                    children['wmt_clients']['hosts'][device.hostname] = hvars
+                    synced += 1
+            self._write_inventory(data)
+            return {'success': True, 'synced': synced,
+                    'message': f'Synced {synced} WMT device(s) to wmt_clients group'}
+        except Exception as e:
+            logging.error(f'Error syncing WMT devices to inventory: {e}')
+            return {'success': False, 'error': str(e)}
+
     def add_group_to_inventory(self, group_name: str) -> Dict:
         """Add a new empty group to the inventory."""
         import re as _re
@@ -193,9 +239,9 @@ class AnsibleService:
 
     def remove_group_from_inventory(self, group_name: str) -> Dict:
         """Remove a custom group from the inventory."""
-        if group_name == 'monitoring_devices':
+        if group_name in ('monitoring_devices', 'wmt_clients'):
             return {'success': False,
-                    'error': 'Cannot remove the default monitoring_devices group'}
+                    'error': f'Cannot remove the built-in "{group_name}" group'}
         try:
             data = self._read_inventory()
             children = data['all'].get('children', {}) or {}
@@ -264,6 +310,7 @@ class AnsibleService:
     def generate_dynamic_inventory(self) -> Dict:
         """Sync DB devices into inventory and return the full inventory dict."""
         self.sync_devices_to_inventory()
+        self.sync_wmt_devices_to_inventory()
         return self._read_inventory()
     
     def create_update_playbook(self) -> str:
diff --git a/data/wmt_releases/latest.json b/data/wmt_releases/latest.json
index 0e31deb..6a0f7d9 100644
--- a/data/wmt_releases/latest.json
+++ b/data/wmt_releases/latest.json
@@ -1,6 +1,6 @@
 {
-  "version": "2.9",
-  "notes": "",
-  "uploaded_at": "2026-05-13T13:17:18",
-  "filename": "wmt_v2.9.zip"
+  "version": "3.0",
+  "notes": "Auto-update from server; TestTemplate silent mode; notconfig devices surface in To Be Configured section",
+  "uploaded_at": "2026-06-26T07:56:55",
+  "filename": "wmt_v3.0.zip"
 }
\ No newline at end of file
diff --git a/data/wmt_releases/wmt_v3.0.zip b/data/wmt_releases/wmt_v3.0.zip
new file mode 100644
index 0000000..7db3c7b
Binary files /dev/null and b/data/wmt_releases/wmt_v3.0.zip differ