Improve socket handling for -x spawned fenrir instances.

tests/integration/test_remote_control.py

@@ -216,6 +216,68 @@ class TestRemoteDataFormat:
         assert result["success"] is False
         assert "Unknown command format" in result["message"]
 
+    def test_list_instances_top_level_command(self, mock_environment):
+        """Test listing registered Fenrir instances."""
+        self.manager.initialize(mock_environment)
+
+        with patch(
+            "fenrirscreenreader.core.remoteManager.remoteInstanceRegistry.list_instances",
+            return_value=[
+                {
+                    "pid": 123,
+                    "ppid": 100,
+                    "screen_driver": "ptyDriver",
+                    "keyboard_driver": "x11Driver",
+                    "main_socket": True,
+                    "x11_window_id": "0x123",
+                    "socket_files": [
+                        "/tmp/fenrirscreenreader-123.sock",
+                        "/tmp/fenrirscreenreader-deamon.sock",
+                    ],
+                }
+            ],
+        ):
+            result = self.manager.handle_remote_incomming_with_response("ls")
+
+        assert result["success"] is True
+        assert "pid=123" in result["message"]
+        assert "x11_window_id=0x123" in result["message"]
+        assert "/tmp/fenrirscreenreader-123.sock" in result["message"]
+
+    def test_remote_incoming_suppresses_command_claimed_by_other_instance(
+        self, mock_environment, tmp_path
+    ):
+        """Test untargeted duplicate remote commands only run in one process."""
+        self.manager.initialize(mock_environment)
+        lock_path = tmp_path / "remote-command.lock"
+        lock_path.write_text("999999 1\n")
+
+        with patch.object(
+            self.manager,
+            "_get_remote_command_lock_path",
+            return_value=str(lock_path),
+        ):
+            self.manager.handle_remote_incomming("command say duplicated")
+
+        mock_environment["runtime"]["OutputManager"].speak_text.assert_not_called()
+
+    def test_remote_incoming_allows_same_instance_repeat(
+        self, mock_environment, tmp_path
+    ):
+        """Test repeated direct commands to one instance are not suppressed."""
+        self.manager.initialize(mock_environment)
+        lock_path = tmp_path / "remote-command.lock"
+
+        with patch.object(
+            self.manager,
+            "_get_remote_command_lock_path",
+            return_value=str(lock_path),
+        ):
+            self.manager.handle_remote_incomming("command say repeat")
+            self.manager.handle_remote_incomming("command say repeat")
+
+        assert mock_environment["runtime"]["OutputManager"].speak_text.call_count == 2
+
 
 @pytest.mark.integration
 @pytest.mark.remote