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diff --git a/archived/projt-launcher/launcher/InstanceCreationTask.h b/archived/projt-launcher/launcher/InstanceCreationTask.h
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+++ b/archived/projt-launcher/launcher/InstanceCreationTask.h
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+// SPDX-License-Identifier: GPL-3.0-only
+// SPDX-FileCopyrightText: 2026 Project Tick
+// SPDX-FileContributor: Project Tick Team
+/*
+ *  ProjT Launcher - Minecraft Launcher
+ *  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, version 3.
+ *
+ *  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 Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+#pragma once
+
+#include "BaseVersion.h"
+#include "InstanceTask.h"
+#include "minecraft/MinecraftInstance.h"
+
+#include <memory>
+
+class InstanceCreationTask : public InstanceTask
+{
+	Q_OBJECT
+  public:
+	InstanceCreationTask()			= default;
+	virtual ~InstanceCreationTask() = default;
+
+	bool abort() override;
+
+  protected:
+	void executeTask() final override;
+
+	/**
+	 * Tries to update an already existing instance.
+	 *
+	 * This can be implemented by subclasses to provide a way of updating an already existing
+	 * instance, according to that implementation's concept of 'identity' (i.e. instances that
+	 * are updates / downgrades of one another).
+	 *
+	 * If this returns true, createInstance() will not run, so you should do all update steps in here.
+	 * Otherwise, createInstance() is run as normal.
+	 */
+	virtual bool updateInstance()
+	{
+		return false;
+	};
+
+	/**
+	 * Creates a new instance.
+	 *
+	 * Returns the instance if it was created or nullptr otherwise.
+	 */
+	virtual std::unique_ptr<MinecraftInstance> createInstance()
+	{
+		return nullptr;
+	};
+
+	QString getError() const
+	{
+		return m_error_message;
+	}
+
+  protected:
+	void setError(const QString& message)
+	{
+		m_error_message = message;
+	};
+
+  protected:
+	bool m_abort = false;
+
+	QStringList m_files_to_remove;
+
+  private:
+	QString m_error_message;
+	std::unique_ptr<MinecraftInstance> m_createdInstance;
+	Task::Ptr m_gameFilesTask;
+};