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diff --git a/meshmc/launcher/UpdateController.h b/meshmc/launcher/UpdateController.h
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+/* SPDX-FileCopyrightText: 2026 Project Tick
+ * SPDX-FileContributor: Project Tick
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ *   MeshMC - A Custom Launcher for Minecraft
+ *   Copyright (C) 2026 Project Tick
+ *
+ *   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 3 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, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <QString>
+
+class QWidget;
+
+/*!
+ * UpdateController launches the separate meshmc-updater binary and then
+ * requests the main application to quit so the updater can proceed.
+ *
+ * The updater binary receives:
+ *   --url  <download_url>   - artifact to download and install
+ *   --root <root_path>      - installation root (directory of the binary)
+ *   --exec <app_binary>     - path to re-launch after the update completes
+ */
+class UpdateController
+{
+  public:
+	UpdateController(QWidget* parent, const QString& root,
+					 const QString& downloadUrl);
+
+	/*!
+	 * Locates the meshmc-updater binary next to the running executable,
+	 * launches it with the required arguments, and returns true on success.
+	 * The caller is responsible for quitting the main application afterwards.
+	 */
+	bool startUpdate();
+
+  private:
+	QWidget* m_parent;
+	QString m_root;
+	QString m_downloadUrl;
+};