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diff --git a/src/capplet/mate-notification-applet-dbus.h b/src/capplet/mate-notification-applet-dbus.h
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+++ b/src/capplet/mate-notification-applet-dbus.h
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+/* mate-notification-applet-dbus.h - MATE Notification Applet - D-Bus Context
+ *
+ * Copyright (C) 2025 MATE Developers
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301  USA
+ */
+
+#ifndef __MATE_NOTIFICATION_APPLET_DBUS_H__
+#define __MATE_NOTIFICATION_APPLET_DBUS_H__
+
+#include <gio/gio.h>
+
+G_BEGIN_DECLS
+
+/* D-Bus context structure for notification daemon communication */
+typedef struct {
+  GDBusProxy *daemon_proxy;
+  gboolean    daemon_available;
+  guint       watch_id;
+} MateNotificationDBusContext;
+
+/* Context creation/cleanup */
+MateNotificationDBusContext *dbus_context_new (void);
+void dbus_context_free (MateNotificationDBusContext *context);
+
+/* Connection management */
+gboolean dbus_context_connect (MateNotificationDBusContext *context);
+void dbus_context_disconnect (MateNotificationDBusContext *context);
+gboolean dbus_context_is_available (MateNotificationDBusContext *context);
+
+/* Notification daemon method calls */
+guint dbus_context_get_notification_count (MateNotificationDBusContext *context);
+gboolean dbus_context_clear_notification_history (MateNotificationDBusContext *context);
+gboolean dbus_context_mark_all_notifications_as_read (MateNotificationDBusContext *context);
+GVariant *dbus_context_get_notification_history (MateNotificationDBusContext *context);
+
+G_END_DECLS
+
+#endif /* __MATE_NOTIFICATION_APPLET_DBUS_H__ */