fix MCPHub group publishing and recovery

dev/test_mcphub_settings.py

@@ -76,6 +76,19 @@ class MCPHubSettingsTests(unittest.TestCase):
         with self.assertRaises(SystemExit):
             self.module.registry_servers(self.registry, self.secrets, {})
 
+    def test_hermes_group_is_recoverable_and_bounded(self):
+        settings = {"groups": [{"id": "keep", "name": "other", "servers": []}]}
+        self.module.ensure_hermes_group(settings)
+        self.module.ensure_hermes_group(settings)
+        groups = settings["groups"]
+        self.assertEqual(len([group for group in groups if group["name"] == "hermes"]), 1)
+        hermes = next(group for group in groups if group["name"] == "hermes")
+        fritzbox = next(item for item in hermes["servers"] if item["name"] == "fritzbox")
+        self.assertEqual(
+            fritzbox["tools"],
+            ["list_services", "list_actions", "describe_action", "call_action"],
+        )
+
 
 if __name__ == "__main__":
     unittest.main()