In useConnection.ts,

- import LoggingMessageNotificationSchema
- set onNotification as notification handler for LoggingMessageNotificationSchema

client/src/lib/hooks/useConnection.ts

@@ -10,6 +10,7 @@ import {
   ListRootsRequestSchema,
   ProgressNotificationSchema,
   ResourceUpdatedNotificationSchema,
+  LoggingMessageNotificationSchema,
   Request,
   Result,
   ServerCapabilities,
@@ -258,6 +259,11 @@ export function useConnection({
           ResourceUpdatedNotificationSchema,
           onNotification,
         );
+
+        client.setNotificationHandler(
+          LoggingMessageNotificationSchema,
+          onNotification,
+        );
       }
 
       if (onStdErrNotification) {