NOISSUE SPDX additions and license transition

SPDX headers were added in this commit,
and we switched to GPL-3.0-or-later. We are now more free.

Signed-off-by: Mehmet Samet Duman <yongdohyun@projecttick.org>

87 files changed, 1551 insertions, 50 deletions

diff --git a/libraries/LocalPeer/include/LocalPeer.h b/libraries/LocalPeer/include/LocalPeer.h
index 3619ed5d14..a84b2da9f2 100644
--- a/libraries/LocalPeer/include/LocalPeer.h
+++ b/libraries/LocalPeer/include/LocalPeer.h
@@ -1,5 +1,5 @@
 /****************************************************************************
-**
+** SPDX-License-Identifier: BSD-3-Clause
 ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
 ** Contact: http://www.qt-project.org/legal
 **
diff --git a/libraries/LocalPeer/src/LocalPeer.cpp b/libraries/LocalPeer/src/LocalPeer.cpp
index 3145b418c7..2cdaf609af 100644
--- a/libraries/LocalPeer/src/LocalPeer.cpp
+++ b/libraries/LocalPeer/src/LocalPeer.cpp
@@ -1,5 +1,5 @@
 /****************************************************************************
-**
+** SPDX-License-Identifier: BSD-3-Clause
 ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
 ** Contact: http://www.qt-project.org/legal
 **
diff --git a/libraries/LocalPeer/src/LockedFile.cpp b/libraries/LocalPeer/src/LockedFile.cpp
index 73294a16eb..03cedee80d 100644
--- a/libraries/LocalPeer/src/LockedFile.cpp
+++ b/libraries/LocalPeer/src/LockedFile.cpp
@@ -1,5 +1,5 @@
 /****************************************************************************
-**
+** SPDX-License-Identifier: BSD-3-Clause
 ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
 ** Contact: http://www.qt-project.org/legal
 **
diff --git a/libraries/LocalPeer/src/LockedFile.h b/libraries/LocalPeer/src/LockedFile.h
index 2f29ee2018..e1f33381bb 100644
--- a/libraries/LocalPeer/src/LockedFile.h
+++ b/libraries/LocalPeer/src/LockedFile.h
@@ -1,5 +1,5 @@
 /****************************************************************************
-**
+** SPDX-License-Identifier: BSD-3-Clause
 ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
 ** Contact: http://www.qt-project.org/legal
 **
diff --git a/libraries/LocalPeer/src/LockedFile_unix.cpp b/libraries/LocalPeer/src/LockedFile_unix.cpp
index 6becc89e2e..9f8142844e 100644
--- a/libraries/LocalPeer/src/LockedFile_unix.cpp
+++ b/libraries/LocalPeer/src/LockedFile_unix.cpp
@@ -1,5 +1,5 @@
 /****************************************************************************
-**
+** SPDX-License-Identifier: BSD-3-Clause
 ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
 ** Contact: http://www.qt-project.org/legal
 **
diff --git a/libraries/LocalPeer/src/LockedFile_win.cpp b/libraries/LocalPeer/src/LockedFile_win.cpp
index 93d2c73b3b..993ad190e4 100644
--- a/libraries/LocalPeer/src/LockedFile_win.cpp
+++ b/libraries/LocalPeer/src/LockedFile_win.cpp
@@ -1,5 +1,5 @@
 /****************************************************************************
-**
+** SPDX-License-Identifier: BSD-3-Clause
 ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
 ** Contact: http://www.qt-project.org/legal
 **
diff --git a/libraries/classparser/include/classparser.h b/libraries/classparser/include/classparser.h
index 3660026bc0..64f0bfec0d 100644
--- a/libraries/classparser/include/classparser.h
+++ b/libraries/classparser/include/classparser.h
@@ -1,6 +1,27 @@
-/* Copyright 2013-2021 MultiMC Contributors
+/* SPDX-FileCopyrightText: 2026 Project Tick
+ * SPDX-FileContributor: Project Tick
+ * SPDX-License-Identifier: GPL-3.0-or-later
  *
- * Authors: Orochimarufan <orochimarufan.x3@gmail.com>
+ *   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/>.
+ *  
+ *  This file incorporates work covered by the following copyright and
+ *  permission notice:
+ *
+ * Copyright 2013-2021 MultiMC Contributors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/libraries/classparser/include/classparser_config.h b/libraries/classparser/include/classparser_config.h
index 7bfae7cc6f..929a873401 100644
--- a/libraries/classparser/include/classparser_config.h
+++ b/libraries/classparser/include/classparser_config.h
@@ -1,4 +1,27 @@
-/* Copyright 2013-2021 MultiMC Contributors
+/* 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/>.
+ *  
+ *  This file incorporates work covered by the following copyright and
+ *  permission notice:
+ *
+ * Copyright 2013-2021 MultiMC Contributors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/libraries/classparser/src/annotations.cpp b/libraries/classparser/src/annotations.cpp
index 18a9e880a7..9298eecc48 100644
--- a/libraries/classparser/src/annotations.cpp
+++ b/libraries/classparser/src/annotations.cpp
@@ -1,3 +1,24 @@
+/* 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/>.
+ */
+
 #include "classfile.h"
 #include "annotations.h"
 #include <sstream>
diff --git a/libraries/classparser/src/annotations.h b/libraries/classparser/src/annotations.h
index 15bf05a477..322f1822b3 100644
--- a/libraries/classparser/src/annotations.h
+++ b/libraries/classparser/src/annotations.h
@@ -1,3 +1,24 @@
+/* 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 "classfile.h"
 #include <map>
diff --git a/libraries/classparser/src/classfile.h b/libraries/classparser/src/classfile.h
index 1616a828eb..e095f8df5f 100644
--- a/libraries/classparser/src/classfile.h
+++ b/libraries/classparser/src/classfile.h
@@ -1,3 +1,24 @@
+/* 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 "membuffer.h"
 #include "constants.h"
diff --git a/libraries/classparser/src/classparser.cpp b/libraries/classparser/src/classparser.cpp
index 601521f682..fdfcfef9b1 100644
--- a/libraries/classparser/src/classparser.cpp
+++ b/libraries/classparser/src/classparser.cpp
@@ -1,6 +1,27 @@
-/* Copyright 2013-2021 MultiMC Contributors
+/* SPDX-FileCopyrightText: 2026 Project Tick
+ * SPDX-FileContributor: Project Tick
+ * SPDX-License-Identifier: GPL-3.0-or-later
  *
- * Authors: Orochimarufan <orochimarufan.x3@gmail.com>
+ *   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/>.
+ *  
+ *  This file incorporates work covered by the following copyright and
+ *  permission notice:
+ *
+ * Copyright 2013-2021 MultiMC Contributors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/libraries/classparser/src/constants.h b/libraries/classparser/src/constants.h
index 3b6c3b7ae9..b7672bac72 100644
--- a/libraries/classparser/src/constants.h
+++ b/libraries/classparser/src/constants.h
@@ -1,3 +1,24 @@
+/* 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 "errors.h"
 #include <sstream>
diff --git a/libraries/classparser/src/errors.h b/libraries/classparser/src/errors.h
index ddbbd82868..2858eea308 100644
--- a/libraries/classparser/src/errors.h
+++ b/libraries/classparser/src/errors.h
@@ -1,3 +1,24 @@
+/* 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 <exception>
 namespace java
diff --git a/libraries/classparser/src/javaendian.h b/libraries/classparser/src/javaendian.h
index 5a6e107b5c..01922a31f4 100644
--- a/libraries/classparser/src/javaendian.h
+++ b/libraries/classparser/src/javaendian.h
@@ -1,3 +1,24 @@
+/* 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 <stdint.h>
 
diff --git a/libraries/classparser/src/membuffer.h b/libraries/classparser/src/membuffer.h
index f81c9705d1..43eec271c1 100644
--- a/libraries/classparser/src/membuffer.h
+++ b/libraries/classparser/src/membuffer.h
@@ -1,3 +1,24 @@
+/* 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 <stdint.h>
 #include <string>
diff --git a/libraries/ganalytics/include/ganalytics.h b/libraries/ganalytics/include/ganalytics.h
index ba42245729..66312105e4 100644
--- a/libraries/ganalytics/include/ganalytics.h
+++ b/libraries/ganalytics/include/ganalytics.h
@@ -1,3 +1,24 @@
+/* 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 <QObject>
diff --git a/libraries/ganalytics/src/ganalytics.cpp b/libraries/ganalytics/src/ganalytics.cpp
index a4b7394f2a..bae9947862 100644
--- a/libraries/ganalytics/src/ganalytics.cpp
+++ b/libraries/ganalytics/src/ganalytics.cpp
@@ -1,3 +1,24 @@
+/* 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/>.
+ */
+
 #include "ganalytics.h"
 #include "ganalytics_worker.h"
 #include "sys.h"
diff --git a/libraries/ganalytics/src/ganalytics_worker.cpp b/libraries/ganalytics/src/ganalytics_worker.cpp
index b0ae75a408..2fd74f4c6c 100644
--- a/libraries/ganalytics/src/ganalytics_worker.cpp
+++ b/libraries/ganalytics/src/ganalytics_worker.cpp
@@ -1,3 +1,24 @@
+/* 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/>.
+ */
+
 #include "ganalytics.h"
 #include "ganalytics_worker.h"
 #include "sys.h"
diff --git a/libraries/ganalytics/src/ganalytics_worker.h b/libraries/ganalytics/src/ganalytics_worker.h
index 1962f79988..339b2d8a5f 100644
--- a/libraries/ganalytics/src/ganalytics_worker.h
+++ b/libraries/ganalytics/src/ganalytics_worker.h
@@ -1,3 +1,24 @@
+/* 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 <QUrlQuery>
diff --git a/libraries/hoedown/include/hoedown/autolink.h b/libraries/hoedown/include/hoedown/autolink.h
index 953e780740..e49d0abb38 100644
--- a/libraries/hoedown/include/hoedown/autolink.h
+++ b/libraries/hoedown/include/hoedown/autolink.h
@@ -1,4 +1,23 @@
-/* autolink.h - versatile autolinker */
+/* 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/>.
+ *//* autolink.h - versatile autolinker */
 
 #ifndef HOEDOWN_AUTOLINK_H
 #define HOEDOWN_AUTOLINK_H
diff --git a/libraries/hoedown/include/hoedown/buffer.h b/libraries/hoedown/include/hoedown/buffer.h
index 062d86ce9b..e78d534450 100644
--- a/libraries/hoedown/include/hoedown/buffer.h
+++ b/libraries/hoedown/include/hoedown/buffer.h
@@ -1,4 +1,23 @@
-/* buffer.h - simple, fast buffers */
+/* 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/>.
+ *//* buffer.h - simple, fast buffers */
 
 #ifndef HOEDOWN_BUFFER_H
 #define HOEDOWN_BUFFER_H
diff --git a/libraries/hoedown/include/hoedown/document.h b/libraries/hoedown/include/hoedown/document.h
index 210c565e7b..848eb7e943 100644
--- a/libraries/hoedown/include/hoedown/document.h
+++ b/libraries/hoedown/include/hoedown/document.h
@@ -1,4 +1,23 @@
-/* document.h - generic markdown parser */
+/* 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/>.
+ *//* document.h - generic markdown parser */
 
 #ifndef HOEDOWN_DOCUMENT_H
 #define HOEDOWN_DOCUMENT_H
diff --git a/libraries/hoedown/include/hoedown/escape.h b/libraries/hoedown/include/hoedown/escape.h
index d7659c27d7..68ba320458 100644
--- a/libraries/hoedown/include/hoedown/escape.h
+++ b/libraries/hoedown/include/hoedown/escape.h
@@ -1,4 +1,23 @@
-/* escape.h - escape utilities */
+/* 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/>.
+ *//* escape.h - escape utilities */
 
 #ifndef HOEDOWN_ESCAPE_H
 #define HOEDOWN_ESCAPE_H
diff --git a/libraries/hoedown/include/hoedown/html.h b/libraries/hoedown/include/hoedown/html.h
index 7c68809a46..63ccd820bb 100644
--- a/libraries/hoedown/include/hoedown/html.h
+++ b/libraries/hoedown/include/hoedown/html.h
@@ -1,4 +1,23 @@
-/* html.h - HTML renderer and utilities */
+/* 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/>.
+ *//* html.h - HTML renderer and utilities */
 
 #ifndef HOEDOWN_HTML_H
 #define HOEDOWN_HTML_H
diff --git a/libraries/hoedown/include/hoedown/stack.h b/libraries/hoedown/include/hoedown/stack.h
index d1855f4f23..ae8c98a6c8 100644
--- a/libraries/hoedown/include/hoedown/stack.h
+++ b/libraries/hoedown/include/hoedown/stack.h
@@ -1,4 +1,23 @@
-/* stack.h - simple stacking */
+/* 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/>.
+ *//* stack.h - simple stacking */
 
 #ifndef HOEDOWN_STACK_H
 #define HOEDOWN_STACK_H
diff --git a/libraries/hoedown/include/hoedown/version.h b/libraries/hoedown/include/hoedown/version.h
index 4938cae56e..364ba7acff 100644
--- a/libraries/hoedown/include/hoedown/version.h
+++ b/libraries/hoedown/include/hoedown/version.h
@@ -1,4 +1,23 @@
-/* version.h - holds Hoedown's version */
+/* 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/>.
+ *//* version.h - holds Hoedown's version */
 
 #ifndef HOEDOWN_VERSION_H
 #define HOEDOWN_VERSION_H
diff --git a/libraries/hoedown/src/autolink.c b/libraries/hoedown/src/autolink.c
index 3063b1a0d0..a2b1917853 100644
--- a/libraries/hoedown/src/autolink.c
+++ b/libraries/hoedown/src/autolink.c
@@ -1,3 +1,24 @@
+/* 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/>.
+ */
+
 #include "hoedown/autolink.h"
 
 #include <string.h>
diff --git a/libraries/hoedown/src/buffer.c b/libraries/hoedown/src/buffer.c
index 024a8bcc79..cdb6f78d64 100644
--- a/libraries/hoedown/src/buffer.c
+++ b/libraries/hoedown/src/buffer.c
@@ -1,3 +1,24 @@
+/* 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/>.
+ */
+
 #include "hoedown/buffer.h"
 
 #include <stdio.h>
diff --git a/libraries/hoedown/src/document.c b/libraries/hoedown/src/document.c
index e9e2ab1185..a0de076ebf 100644
--- a/libraries/hoedown/src/document.c
+++ b/libraries/hoedown/src/document.c
@@ -1,3 +1,24 @@
+/* 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/>.
+ */
+
 #include "hoedown/document.h"
 
 #include <assert.h>
diff --git a/libraries/hoedown/src/escape.c b/libraries/hoedown/src/escape.c
index ce25dd5498..f1d23fd00f 100644
--- a/libraries/hoedown/src/escape.c
+++ b/libraries/hoedown/src/escape.c
@@ -1,3 +1,24 @@
+/* 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/>.
+ */
+
 #include "hoedown/escape.h"
 
 #include <assert.h>
diff --git a/libraries/hoedown/src/html.c b/libraries/hoedown/src/html.c
index 8bf3358ed8..b1cc2f7ec2 100644
--- a/libraries/hoedown/src/html.c
+++ b/libraries/hoedown/src/html.c
@@ -1,3 +1,24 @@
+/* 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/>.
+ */
+
 #include "hoedown/html.h"
 
 #include <string.h>
diff --git a/libraries/hoedown/src/html_blocks.c b/libraries/hoedown/src/html_blocks.c
index f5e9dce9ac..f66d947bf5 100644
--- a/libraries/hoedown/src/html_blocks.c
+++ b/libraries/hoedown/src/html_blocks.c
@@ -1,3 +1,24 @@
+/* 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/>.
+ */
+
 /* ANSI-C code produced by gperf version 3.0.3 */
 /* Command-line: gperf -L ANSI-C -N hoedown_find_block_tag -c -C -E -S 1 --ignore-case -m100 html_block_names.gperf  */
 /* Computed positions: -k'1-2' */
diff --git a/libraries/hoedown/src/html_smartypants.c b/libraries/hoedown/src/html_smartypants.c
index d89624f317..514a8c1084 100644
--- a/libraries/hoedown/src/html_smartypants.c
+++ b/libraries/hoedown/src/html_smartypants.c
@@ -1,3 +1,24 @@
+/* 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/>.
+ */
+
 #include "hoedown/html.h"
 
 #include <string.h>
diff --git a/libraries/hoedown/src/stack.c b/libraries/hoedown/src/stack.c
index 0523c11bb6..d1441f8d47 100644
--- a/libraries/hoedown/src/stack.c
+++ b/libraries/hoedown/src/stack.c
@@ -1,3 +1,24 @@
+/* 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/>.
+ */
+
 #include "hoedown/stack.h"
 
 #include "hoedown/buffer.h"
diff --git a/libraries/hoedown/src/version.c b/libraries/hoedown/src/version.c
index 10d36cb952..31508a3fac 100644
--- a/libraries/hoedown/src/version.c
+++ b/libraries/hoedown/src/version.c
@@ -1,3 +1,24 @@
+/* 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/>.
+ */
+
 #include "hoedown/version.h"
 
 void
diff --git a/libraries/iconfix/internal/qhexstring_p.h b/libraries/iconfix/internal/qhexstring_p.h
index c81904e5fd..2fd7a4e906 100644
--- a/libraries/iconfix/internal/qhexstring_p.h
+++ b/libraries/iconfix/internal/qhexstring_p.h
@@ -1,5 +1,5 @@
 /****************************************************************************
-**
+** SPDX-License-Identifier: LGPL-2.1-or-later
 ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
 ** Contact: http://www.qt-project.org/legal
 **
diff --git a/libraries/iconfix/internal/qiconloader.cpp b/libraries/iconfix/internal/qiconloader.cpp
index b91ddba888..ec4eeb288b 100644
--- a/libraries/iconfix/internal/qiconloader.cpp
+++ b/libraries/iconfix/internal/qiconloader.cpp
@@ -1,5 +1,5 @@
 /****************************************************************************
-**
+** SPDX-License-Identifier: LGPL-2.1-or-later
 ** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
 ** Contact: http://www.qt-project.org/legal
 **
diff --git a/libraries/iconfix/internal/qiconloader_p.h b/libraries/iconfix/internal/qiconloader_p.h
index 3fb6d75ea2..68d8cd00cd 100644
--- a/libraries/iconfix/internal/qiconloader_p.h
+++ b/libraries/iconfix/internal/qiconloader_p.h
@@ -1,5 +1,5 @@
 /****************************************************************************
-**
+** SPDX-License-Identifier: LGPL-2.1-or-later
 ** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
 ** Contact: http://www.qt-project.org/legal
 **
diff --git a/libraries/iconfix/xdgicon.cpp b/libraries/iconfix/xdgicon.cpp
index 36fb7d42b1..1b55222611 100644
--- a/libraries/iconfix/xdgicon.cpp
+++ b/libraries/iconfix/xdgicon.cpp
@@ -1,6 +1,7 @@
 /* BEGIN_COMMON_COPYRIGHT_HEADER
  * (c)LGPL2+
- *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ * SPDX-FileCopyrightText: N/A
  * Razor - a lightweight, Qt based, desktop toolset
  * http://razor-qt.org
  *
diff --git a/libraries/iconfix/xdgicon.h b/libraries/iconfix/xdgicon.h
index d37eb71872..247f8c8133 100644
--- a/libraries/iconfix/xdgicon.h
+++ b/libraries/iconfix/xdgicon.h
@@ -1,6 +1,7 @@
 /* BEGIN_COMMON_COPYRIGHT_HEADER
  * (c)LGPL2+
- *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ * SPDX-FileCopyrightText: N/A
  * Razor - a lightweight, Qt based, desktop toolset
  * http://razor-qt.org
  *
diff --git a/libraries/javacheck/JavaCheck.java b/libraries/javacheck/JavaCheck.java
index 560abbc072..611b95d695 100644
--- a/libraries/javacheck/JavaCheck.java
+++ b/libraries/javacheck/JavaCheck.java
@@ -1,3 +1,24 @@
+/* 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/>.
+ */
+
 import java.lang.Integer;
 
 public class JavaCheck
diff --git a/libraries/katabasis/include/katabasis/Bits.h b/libraries/katabasis/include/katabasis/Bits.h
index f11f25d25c..9fd2d504c2 100644
--- a/libraries/katabasis/include/katabasis/Bits.h
+++ b/libraries/katabasis/include/katabasis/Bits.h
@@ -1,3 +1,24 @@
+/* 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>
diff --git a/libraries/katabasis/include/katabasis/DeviceFlow.h b/libraries/katabasis/include/katabasis/DeviceFlow.h
index b68c92e03f..6de014027c 100644
--- a/libraries/katabasis/include/katabasis/DeviceFlow.h
+++ b/libraries/katabasis/include/katabasis/DeviceFlow.h
@@ -1,3 +1,24 @@
+/* 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 <QNetworkAccessManager>
diff --git a/libraries/katabasis/include/katabasis/Globals.h b/libraries/katabasis/include/katabasis/Globals.h
index 512745d3c7..229e5a5a5e 100644
--- a/libraries/katabasis/include/katabasis/Globals.h
+++ b/libraries/katabasis/include/katabasis/Globals.h
@@ -1,3 +1,24 @@
+/* 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
 
 namespace Katabasis {
diff --git a/libraries/katabasis/include/katabasis/PollServer.h b/libraries/katabasis/include/katabasis/PollServer.h
index 77103867c0..f18dd10974 100644
--- a/libraries/katabasis/include/katabasis/PollServer.h
+++ b/libraries/katabasis/include/katabasis/PollServer.h
@@ -1,3 +1,24 @@
+/* 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 <QByteArray>
diff --git a/libraries/katabasis/include/katabasis/Reply.h b/libraries/katabasis/include/katabasis/Reply.h
index 415cf4ec81..d8dce403c4 100644
--- a/libraries/katabasis/include/katabasis/Reply.h
+++ b/libraries/katabasis/include/katabasis/Reply.h
@@ -1,3 +1,24 @@
+/* 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 <QList>
diff --git a/libraries/katabasis/include/katabasis/RequestParameter.h b/libraries/katabasis/include/katabasis/RequestParameter.h
index ca36934a3a..a3c0227e66 100644
--- a/libraries/katabasis/include/katabasis/RequestParameter.h
+++ b/libraries/katabasis/include/katabasis/RequestParameter.h
@@ -1,3 +1,24 @@
+/* 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
 
 namespace Katabasis {
diff --git a/libraries/katabasis/src/DeviceFlow.cpp b/libraries/katabasis/src/DeviceFlow.cpp
index ba1d121d0f..c40059f44c 100644
--- a/libraries/katabasis/src/DeviceFlow.cpp
+++ b/libraries/katabasis/src/DeviceFlow.cpp
@@ -1,3 +1,24 @@
+/* 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/>.
+ */
+
 #include <QList>
 #include <QPair>
 #include <QDebug>
diff --git a/libraries/katabasis/src/JsonResponse.cpp b/libraries/katabasis/src/JsonResponse.cpp
index 63384d1214..e537f3458b 100644
--- a/libraries/katabasis/src/JsonResponse.cpp
+++ b/libraries/katabasis/src/JsonResponse.cpp
@@ -1,3 +1,24 @@
+/* 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/>.
+ */
+
 #include "JsonResponse.h"
 
 #include <QByteArray>
diff --git a/libraries/katabasis/src/JsonResponse.h b/libraries/katabasis/src/JsonResponse.h
index e7fe7e30d3..531c66e771 100644
--- a/libraries/katabasis/src/JsonResponse.h
+++ b/libraries/katabasis/src/JsonResponse.h
@@ -1,3 +1,24 @@
+/* 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 <QVariantMap>
diff --git a/libraries/katabasis/src/PollServer.cpp b/libraries/katabasis/src/PollServer.cpp
index 1083c59947..99fc8279f5 100644
--- a/libraries/katabasis/src/PollServer.cpp
+++ b/libraries/katabasis/src/PollServer.cpp
@@ -1,3 +1,24 @@
+/* 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/>.
+ */
+
 #include <QNetworkAccessManager>
 #include <QNetworkReply>
 
diff --git a/libraries/katabasis/src/Reply.cpp b/libraries/katabasis/src/Reply.cpp
index 3e27a7e6be..1d3894ecc3 100644
--- a/libraries/katabasis/src/Reply.cpp
+++ b/libraries/katabasis/src/Reply.cpp
@@ -1,3 +1,24 @@
+/* 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/>.
+ */
+
 #include <QTimer>
 #include <QNetworkReply>
 
diff --git a/libraries/launcher/net/minecraft/Launcher.java b/libraries/launcher/net/minecraft/Launcher.java
index b6b0a574a3..d6b27ccb27 100644
--- a/libraries/launcher/net/minecraft/Launcher.java
+++ b/libraries/launcher/net/minecraft/Launcher.java
@@ -1,4 +1,43 @@
-/*
+/* 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.
+ *
+ *   Linking this library statically or dynamically with other modules is
+ *   making a combined work based on this library. Thus, the terms and
+ *   conditions of the GNU General Public License cover the whole
+ *   combination.
+ *
+ *   As a special exception, the copyright holders of this library give
+ *   you permission to link this library with independent modules to
+ *   produce an executable, regardless of the license terms of these
+ *   independent modules, and to copy and distribute the resulting
+ *   executable under terms of your choice, provided that you also meet,
+ *   for each linked independent module, the terms and conditions of the
+ *   license of that module. An independent module is a module which is
+ *   not derived from or based on this library. If you modify this
+ *   library, you may extend this exception to your version of the
+ *   library, but you are not obliged to do so. If you do not wish to do
+ *   so, delete this exception statement from your version.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ *  This file incorporates work covered by the following copyright and
+ *  permission notice:
+ * 
  * Copyright 2012-2021 MultiMC Contributors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/libraries/launcher/org/projecttick/EntryPoint.java b/libraries/launcher/org/projecttick/EntryPoint.java
index 8b1f721e7e..c37fff07ec 100644
--- a/libraries/launcher/org/projecttick/EntryPoint.java
+++ b/libraries/launcher/org/projecttick/EntryPoint.java
@@ -1,4 +1,43 @@
-package org.projecttick;/*
+/* 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.
+ *
+ *   Linking this library statically or dynamically with other modules is
+ *   making a combined work based on this library. Thus, the terms and
+ *   conditions of the GNU General Public License cover the whole
+ *   combination.
+ *
+ *   As a special exception, the copyright holders of this library give
+ *   you permission to link this library with independent modules to
+ *   produce an executable, regardless of the license terms of these
+ *   independent modules, and to copy and distribute the resulting
+ *   executable under terms of your choice, provided that you also meet,
+ *   for each linked independent module, the terms and conditions of the
+ *   license of that module. An independent module is a module which is
+ *   not derived from or based on this library. If you modify this
+ *   library, you may extend this exception to your version of the
+ *   library, but you are not obliged to do so. If you do not wish to do
+ *   so, delete this exception statement from your version.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ *  This file incorporates work covered by the following copyright and
+ *  permission notice:
+ *
  * Copyright 2012-2021 MultiMC Contributors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -14,6 +53,8 @@ package org.projecttick;/*
  * limitations under the License.
  */
 
+package org.projecttick;
+
 import org.projecttick.modern.ModernLauncher;
 import org.projecttick.onesix.OneSixLauncher;
 
diff --git a/libraries/launcher/org/projecttick/Launcher.java b/libraries/launcher/org/projecttick/Launcher.java
index c18978bde3..7d5b7ec0e2 100644
--- a/libraries/launcher/org/projecttick/Launcher.java
+++ b/libraries/launcher/org/projecttick/Launcher.java
@@ -1,4 +1,43 @@
-/*
+/* 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.
+ *
+ *   Linking this library statically or dynamically with other modules is
+ *   making a combined work based on this library. Thus, the terms and
+ *   conditions of the GNU General Public License cover the whole
+ *   combination.
+ *
+ *   As a special exception, the copyright holders of this library give
+ *   you permission to link this library with independent modules to
+ *   produce an executable, regardless of the license terms of these
+ *   independent modules, and to copy and distribute the resulting
+ *   executable under terms of your choice, provided that you also meet,
+ *   for each linked independent module, the terms and conditions of the
+ *   license of that module. An independent module is a module which is
+ *   not derived from or based on this library. If you modify this
+ *   library, you may extend this exception to your version of the
+ *   library, but you are not obliged to do so. If you do not wish to do
+ *   so, delete this exception statement from your version.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ *  This file incorporates work covered by the following copyright and
+ *  permission notice:
+ *
  * Copyright 2012-2021 MultiMC Contributors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/libraries/launcher/org/projecttick/LegacyFrame.java b/libraries/launcher/org/projecttick/LegacyFrame.java
index 4b8957a597..580c868942 100644
--- a/libraries/launcher/org/projecttick/LegacyFrame.java
+++ b/libraries/launcher/org/projecttick/LegacyFrame.java
@@ -1,4 +1,43 @@
-package org.projecttick;/*
+/* 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.
+ *
+ *   Linking this library statically or dynamically with other modules is
+ *   making a combined work based on this library. Thus, the terms and
+ *   conditions of the GNU General Public License cover the whole
+ *   combination.
+ *
+ *   As a special exception, the copyright holders of this library give
+ *   you permission to link this library with independent modules to
+ *   produce an executable, regardless of the license terms of these
+ *   independent modules, and to copy and distribute the resulting
+ *   executable under terms of your choice, provided that you also meet,
+ *   for each linked independent module, the terms and conditions of the
+ *   license of that module. An independent module is a module which is
+ *   not derived from or based on this library. If you modify this
+ *   library, you may extend this exception to your version of the
+ *   library, but you are not obliged to do so. If you do not wish to do
+ *   so, delete this exception statement from your version.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ *  This file incorporates work covered by the following copyright and
+ *  permission notice:
+ *
  * Copyright 2012-2021 MultiMC Contributors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -14,6 +53,8 @@ package org.projecttick;/*
  * limitations under the License.
  */
 
+package org.projecttick;
+
 import net.minecraft.Launcher;
 
 import javax.imageio.ImageIO;
diff --git a/libraries/launcher/org/projecttick/NotFoundException.java b/libraries/launcher/org/projecttick/NotFoundException.java
index 24c93bc5cf..fdf94ace4c 100644
--- a/libraries/launcher/org/projecttick/NotFoundException.java
+++ b/libraries/launcher/org/projecttick/NotFoundException.java
@@ -1,4 +1,43 @@
-/*
+/* 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.
+ *
+ *   Linking this library statically or dynamically with other modules is
+ *   making a combined work based on this library. Thus, the terms and
+ *   conditions of the GNU General Public License cover the whole
+ *   combination.
+ *
+ *   As a special exception, the copyright holders of this library give
+ *   you permission to link this library with independent modules to
+ *   produce an executable, regardless of the license terms of these
+ *   independent modules, and to copy and distribute the resulting
+ *   executable under terms of your choice, provided that you also meet,
+ *   for each linked independent module, the terms and conditions of the
+ *   license of that module. An independent module is a module which is
+ *   not derived from or based on this library. If you modify this
+ *   library, you may extend this exception to your version of the
+ *   library, but you are not obliged to do so. If you do not wish to do
+ *   so, delete this exception statement from your version.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ *  This file incorporates work covered by the following copyright and
+ *  permission notice:
+ *
  * Copyright 2012-2021 MultiMC Contributors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/libraries/launcher/org/projecttick/ParamBucket.java b/libraries/launcher/org/projecttick/ParamBucket.java
index 9d003f9f22..97773c9605 100644
--- a/libraries/launcher/org/projecttick/ParamBucket.java
+++ b/libraries/launcher/org/projecttick/ParamBucket.java
@@ -1,4 +1,43 @@
-/*
+/* 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.
+ *
+ *   Linking this library statically or dynamically with other modules is
+ *   making a combined work based on this library. Thus, the terms and
+ *   conditions of the GNU General Public License cover the whole
+ *   combination.
+ *
+ *   As a special exception, the copyright holders of this library give
+ *   you permission to link this library with independent modules to
+ *   produce an executable, regardless of the license terms of these
+ *   independent modules, and to copy and distribute the resulting
+ *   executable under terms of your choice, provided that you also meet,
+ *   for each linked independent module, the terms and conditions of the
+ *   license of that module. An independent module is a module which is
+ *   not derived from or based on this library. If you modify this
+ *   library, you may extend this exception to your version of the
+ *   library, but you are not obliged to do so. If you do not wish to do
+ *   so, delete this exception statement from your version.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ *  This file incorporates work covered by the following copyright and
+ *  permission notice:
+ *
  * Copyright 2012-2021 MultiMC Contributors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/libraries/launcher/org/projecttick/ParseException.java b/libraries/launcher/org/projecttick/ParseException.java
index 0100f942e9..5e3ca0df1a 100644
--- a/libraries/launcher/org/projecttick/ParseException.java
+++ b/libraries/launcher/org/projecttick/ParseException.java
@@ -1,4 +1,43 @@
-/*
+/* 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.
+ *
+ *   Linking this library statically or dynamically with other modules is
+ *   making a combined work based on this library. Thus, the terms and
+ *   conditions of the GNU General Public License cover the whole
+ *   combination.
+ *
+ *   As a special exception, the copyright holders of this library give
+ *   you permission to link this library with independent modules to
+ *   produce an executable, regardless of the license terms of these
+ *   independent modules, and to copy and distribute the resulting
+ *   executable under terms of your choice, provided that you also meet,
+ *   for each linked independent module, the terms and conditions of the
+ *   license of that module. An independent module is a module which is
+ *   not derived from or based on this library. If you modify this
+ *   library, you may extend this exception to your version of the
+ *   library, but you are not obliged to do so. If you do not wish to do
+ *   so, delete this exception statement from your version.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ *  This file incorporates work covered by the following copyright and
+ *  permission notice:
+ *
  * Copyright 2012-2021 MultiMC Contributors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/libraries/launcher/org/projecttick/Utils.java b/libraries/launcher/org/projecttick/Utils.java
index ef718f52c5..21bdae3bbc 100644
--- a/libraries/launcher/org/projecttick/Utils.java
+++ b/libraries/launcher/org/projecttick/Utils.java
@@ -1,4 +1,43 @@
-/*
+/* 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.
+ *
+ *   Linking this library statically or dynamically with other modules is
+ *   making a combined work based on this library. Thus, the terms and
+ *   conditions of the GNU General Public License cover the whole
+ *   combination.
+ *
+ *   As a special exception, the copyright holders of this library give
+ *   you permission to link this library with independent modules to
+ *   produce an executable, regardless of the license terms of these
+ *   independent modules, and to copy and distribute the resulting
+ *   executable under terms of your choice, provided that you also meet,
+ *   for each linked independent module, the terms and conditions of the
+ *   license of that module. An independent module is a module which is
+ *   not derived from or based on this library. If you modify this
+ *   library, you may extend this exception to your version of the
+ *   library, but you are not obliged to do so. If you do not wish to do
+ *   so, delete this exception statement from your version.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ *  This file incorporates work covered by the following copyright and
+ *  permission notice:
+ *
  * Copyright 2012-2021 MultiMC Contributors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/libraries/launcher/org/projecttick/modern/ModernLauncher.java b/libraries/launcher/org/projecttick/modern/ModernLauncher.java
index 2cb835fe5f..eda5584acc 100644
--- a/libraries/launcher/org/projecttick/modern/ModernLauncher.java
+++ b/libraries/launcher/org/projecttick/modern/ModernLauncher.java
@@ -1,6 +1,43 @@
-package org.projecttick.modern;
-
-/*
+/* 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.
+ *
+ *   Linking this library statically or dynamically with other modules is
+ *   making a combined work based on this library. Thus, the terms and
+ *   conditions of the GNU General Public License cover the whole
+ *   combination.
+ *
+ *   As a special exception, the copyright holders of this library give
+ *   you permission to link this library with independent modules to
+ *   produce an executable, regardless of the license terms of these
+ *   independent modules, and to copy and distribute the resulting
+ *   executable under terms of your choice, provided that you also meet,
+ *   for each linked independent module, the terms and conditions of the
+ *   license of that module. An independent module is a module which is
+ *   not derived from or based on this library. If you modify this
+ *   library, you may extend this exception to your version of the
+ *   library, but you are not obliged to do so. If you do not wish to do
+ *   so, delete this exception statement from your version.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ *  This file incorporates work covered by the following copyright and
+ *  permission notice:
+ *
  * Copyright 2012-2021 MultiMC Contributors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -16,6 +53,8 @@ package org.projecttick.modern;
  * limitations under the License.
  */
 
+package org.projecttick.modern;
+
 import org.projecttick.Launcher;
 import org.projecttick.ParamBucket;
 import org.projecttick.Utils;
diff --git a/libraries/launcher/org/projecttick/onesix/OneSixLauncher.java b/libraries/launcher/org/projecttick/onesix/OneSixLauncher.java
index d4f4045102..b458b4249d 100644
--- a/libraries/launcher/org/projecttick/onesix/OneSixLauncher.java
+++ b/libraries/launcher/org/projecttick/onesix/OneSixLauncher.java
@@ -1,4 +1,44 @@
-/* Copyright 2012-2021 MultiMC Contributors
+/* 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.
+ *
+ *   Linking this library statically or dynamically with other modules is
+ *   making a combined work based on this library. Thus, the terms and
+ *   conditions of the GNU General Public License cover the whole
+ *   combination.
+ *
+ *   As a special exception, the copyright holders of this library give
+ *   you permission to link this library with independent modules to
+ *   produce an executable, regardless of the license terms of these
+ *   independent modules, and to copy and distribute the resulting
+ *   executable under terms of your choice, provided that you also meet,
+ *   for each linked independent module, the terms and conditions of the
+ *   license of that module. An independent module is a module which is
+ *   not derived from or based on this library. If you modify this
+ *   library, you may extend this exception to your version of the
+ *   library, but you are not obliged to do so. If you do not wish to do
+ *   so, delete this exception statement from your version.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ *  This file incorporates work covered by the following copyright and
+ *  permission notice:
+ *
+ * Copyright 2012-2021 MultiMC Contributors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/libraries/optional-bare/include/nonstd/optional b/libraries/optional-bare/include/nonstd/optional
index ecbfa030d1..bcb06d571c 100644
--- a/libraries/optional-bare/include/nonstd/optional
+++ b/libraries/optional-bare/include/nonstd/optional
@@ -1,4 +1,4 @@
-//
+// SPDX-License-Identifier: BSL-1.0
 // Copyright 2017-2019 by Martin Moene
 //
 // https://github.com/martinmoene/optional-bare
diff --git a/libraries/rainbow/include/rainbow.h b/libraries/rainbow/include/rainbow.h
index 67c463006a..78f4e375e2 100644
--- a/libraries/rainbow/include/rainbow.h
+++ b/libraries/rainbow/include/rainbow.h
@@ -1,9 +1,12 @@
-/* This was part of the KDE project - see KGuiAddons
+/* SPDX-License-Identifier: LGPL-2.0-or-later
+ *
+ * This was part of the KDE project - see KGuiAddons
  * Copyright (C) 2007 Matthew Woehlke <mw_triad@users.sourceforge.net>
  * Copyright (C) 2007 Olaf Schmidt <ojschmidt@kde.org>
  * Copyright (C) 2007 Thomas Zander <zander@kde.org>
  * Copyright (C) 2007 Zack Rusin <zack@kde.org>
  * Copyright (C) 2015 Petr Mrazek <peterix@gmail.com>
+ * Copyright (C) 2026 Project Tick
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
diff --git a/libraries/rainbow/include/rainbow_config.h b/libraries/rainbow/include/rainbow_config.h
index 52cc7388d5..3fddc202f9 100644
--- a/libraries/rainbow/include/rainbow_config.h
+++ b/libraries/rainbow/include/rainbow_config.h
@@ -1,4 +1,27 @@
-/* Copyright 2013-2021 MultiMC Contributors
+/* 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/>.
+ *  
+ *  This file incorporates work covered by the following copyright and
+ *  permission notice:
+ *
+ * Copyright 2013-2021 MultiMC Contributors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/libraries/rainbow/src/rainbow.cpp b/libraries/rainbow/src/rainbow.cpp
index 9054d71dd0..e3966d5334 100644
--- a/libraries/rainbow/src/rainbow.cpp
+++ b/libraries/rainbow/src/rainbow.cpp
@@ -1,9 +1,12 @@
-/* This was part of the KDE project - see KGuiAddons
+/* SPDX-License-Identifier: LGPL-2.0-or-later
+ *
+ * This was part of the KDE project - see KGuiAddons
  * Copyright (C) 2007 Matthew Woehlke <mw_triad@users.sourceforge.net>
  * Copyright (C) 2007 Olaf Schmidt <ojschmidt@kde.org>
  * Copyright (C) 2007 Thomas Zander <zander@kde.org>
  * Copyright (C) 2007 Zack Rusin <zack@kde.org>
  * Copyright (C) 2015 Petr Mrazek <peterix@gmail.com>
+ * Copyright (C) 2026 Project Tick
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
diff --git a/libraries/systeminfo/include/distroutils.h b/libraries/systeminfo/include/distroutils.h
index 2e85f43364..5acd1a7dc4 100644
--- a/libraries/systeminfo/include/distroutils.h
+++ b/libraries/systeminfo/include/distroutils.h
@@ -1,3 +1,24 @@
+/* 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/>.
+ */
+
 #include "sys.h"
 #include <QString>
 
diff --git a/libraries/systeminfo/include/sys.h b/libraries/systeminfo/include/sys.h
index bd6e2486a2..349ad26ce3 100644
--- a/libraries/systeminfo/include/sys.h
+++ b/libraries/systeminfo/include/sys.h
@@ -1,3 +1,24 @@
+/* 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>
 
diff --git a/libraries/systeminfo/src/distroutils.cpp b/libraries/systeminfo/src/distroutils.cpp
index 37ff9783ce..562099dcdd 100644
--- a/libraries/systeminfo/src/distroutils.cpp
+++ b/libraries/systeminfo/src/distroutils.cpp
@@ -1,8 +1,31 @@
 /*
 
+ SPDX-FileCopyrightText: 2026 Project Tick
+ SPDX-FileContributor: Project Tick
+ SPDX-License-Identifier: GPL-3.0-or-later
+
 Code has been taken from https://github.com/natefoo/lionshead and loosely
 translated to C++ laced with Qt.
 
+   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/>.
+
+  This file incorporates work covered by the following copyright and
+  permission notice:
+
 MIT License
 
 Copyright (c) 2017 Nate Coraor
diff --git a/libraries/systeminfo/src/sys_apple.cpp b/libraries/systeminfo/src/sys_apple.cpp
index 6353b747b7..6ddaf7de73 100644
--- a/libraries/systeminfo/src/sys_apple.cpp
+++ b/libraries/systeminfo/src/sys_apple.cpp
@@ -1,3 +1,24 @@
+/* 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/>.
+ */
+
 #include "sys.h"
 
 #include <sys/utsname.h>
diff --git a/libraries/systeminfo/src/sys_test.cpp b/libraries/systeminfo/src/sys_test.cpp
index 315050d298..cf8896eb59 100644
--- a/libraries/systeminfo/src/sys_test.cpp
+++ b/libraries/systeminfo/src/sys_test.cpp
@@ -1,3 +1,24 @@
+/* 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/>.
+ */
+
 #include <QTest>
 #include "TestUtil.h"
 
diff --git a/libraries/systeminfo/src/sys_unix.cpp b/libraries/systeminfo/src/sys_unix.cpp
index b309852269..1635cfb1be 100644
--- a/libraries/systeminfo/src/sys_unix.cpp
+++ b/libraries/systeminfo/src/sys_unix.cpp
@@ -1,3 +1,24 @@
+/* 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/>.
+ */
+
 #include "sys.h"
 
 #include "distroutils.h"
diff --git a/libraries/systeminfo/src/sys_win32.cpp b/libraries/systeminfo/src/sys_win32.cpp
index 430b87e474..349c2584f5 100644
--- a/libraries/systeminfo/src/sys_win32.cpp
+++ b/libraries/systeminfo/src/sys_win32.cpp
@@ -1,3 +1,24 @@
+/* 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/>.
+ */
+
 #include "sys.h"
 
 #include <windows.h>
diff --git a/libraries/tomlc99/include/toml.h b/libraries/tomlc99/include/toml.h
index b91ef89030..b9b134925d 100644
--- a/libraries/tomlc99/include/toml.h
+++ b/libraries/tomlc99/include/toml.h
@@ -1,4 +1,27 @@
 /*
+ 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/>.
+
+  This file incorporates work covered by the following copyright and
+  permission notice:
+
   MIT License
 
   Copyright (c) 2017 - 2019 CK Tan
diff --git a/libraries/tomlc99/src/toml.c b/libraries/tomlc99/src/toml.c
index e46e62e629..116c7ed199 100644
--- a/libraries/tomlc99/src/toml.c
+++ b/libraries/tomlc99/src/toml.c
@@ -1,4 +1,26 @@
 /*
+ 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/>.
+
+  This file incorporates work covered by the following copyright and
+  permission notice:
 
   MIT License
 
diff --git a/libraries/xz-embedded/include/xz.h b/libraries/xz-embedded/include/xz.h
index 3779124c14..a6ad452deb 100644
--- a/libraries/xz-embedded/include/xz.h
+++ b/libraries/xz-embedded/include/xz.h
@@ -1,4 +1,5 @@
-/*
+/* SPDX-License-Identifier: Unlicense
+ * SPDX-FileCopyrightText: N/A
  * XZ decompressor
  *
  * Authors: Lasse Collin <lasse.collin@tukaani.org>
diff --git a/libraries/xz-embedded/src/xz_config.h b/libraries/xz-embedded/src/xz_config.h
index effdb1bd6d..70a8d24345 100644
--- a/libraries/xz-embedded/src/xz_config.h
+++ b/libraries/xz-embedded/src/xz_config.h
@@ -1,4 +1,5 @@
-/*
+/* SPDX-License-Identifier: Unlicense
+ * SPDX-FileCopyrightText: N/A
  * Private includes and definitions for userspace use of XZ Embedded
  *
  * Author: Lasse Collin <lasse.collin@tukaani.org>
diff --git a/libraries/xz-embedded/src/xz_crc32.c b/libraries/xz-embedded/src/xz_crc32.c
index 65d9d5b8f3..06e0cab1d4 100644
--- a/libraries/xz-embedded/src/xz_crc32.c
+++ b/libraries/xz-embedded/src/xz_crc32.c
@@ -1,4 +1,5 @@
-/*
+/* SPDX-License-Identifier: Unlicense
+ * SPDX-FileCopyrightText: N/A
  * CRC32 using the polynomial from IEEE-802.3
  *
  * Authors: Lasse Collin <lasse.collin@tukaani.org>
diff --git a/libraries/xz-embedded/src/xz_crc64.c b/libraries/xz-embedded/src/xz_crc64.c
index 0f711d8dda..f8969dc5a1 100644
--- a/libraries/xz-embedded/src/xz_crc64.c
+++ b/libraries/xz-embedded/src/xz_crc64.c
@@ -1,4 +1,5 @@
-/*
+/* SPDX-License-Identifier: Unlicense
+ * SPDX-FileCopyrightText: N/A
  * CRC64 using the polynomial from ECMA-182
  *
  * This file is similar to xz_crc32.c. See the comments there.
diff --git a/libraries/xz-embedded/src/xz_dec_bcj.c b/libraries/xz-embedded/src/xz_dec_bcj.c
index a79fa76dbb..b55f3a922f 100644
--- a/libraries/xz-embedded/src/xz_dec_bcj.c
+++ b/libraries/xz-embedded/src/xz_dec_bcj.c
@@ -1,4 +1,5 @@
-/*
+/* SPDX-License-Identifier: Unlicense
+ * SPDX-FileCopyrightText: N/A
  * Branch/Call/Jump (BCJ) filter decoders
  *
  * Authors: Lasse Collin <lasse.collin@tukaani.org>
diff --git a/libraries/xz-embedded/src/xz_dec_lzma2.c b/libraries/xz-embedded/src/xz_dec_lzma2.c
index 365ace2b9f..693ece7b00 100644
--- a/libraries/xz-embedded/src/xz_dec_lzma2.c
+++ b/libraries/xz-embedded/src/xz_dec_lzma2.c
@@ -1,4 +1,5 @@
-/*
+/* SPDX-License-Identifier: Unlicense
+ * SPDX-FileCopyrightText: N/A
  * LZMA2 decoder
  *
  * Authors: Lasse Collin <lasse.collin@tukaani.org>
diff --git a/libraries/xz-embedded/src/xz_dec_stream.c b/libraries/xz-embedded/src/xz_dec_stream.c
index f8d7be0526..5e2bbf453f 100644
--- a/libraries/xz-embedded/src/xz_dec_stream.c
+++ b/libraries/xz-embedded/src/xz_dec_stream.c
@@ -1,4 +1,5 @@
-/*
+/* SPDX-License-Identifier: Unlicense
+ * SPDX-FileCopyrightText: N/A
  * .xz Stream decoder
  *
  * Author: Lasse Collin <lasse.collin@tukaani.org>
diff --git a/libraries/xz-embedded/src/xz_lzma2.h b/libraries/xz-embedded/src/xz_lzma2.h
index 82a425f245..257d363829 100644
--- a/libraries/xz-embedded/src/xz_lzma2.h
+++ b/libraries/xz-embedded/src/xz_lzma2.h
@@ -1,4 +1,5 @@
-/*
+/* SPDX-License-Identifier: Unlicense
+ * SPDX-FileCopyrightText: N/A
  * LZMA2 definitions
  *
  * Authors: Lasse Collin <lasse.collin@tukaani.org>
diff --git a/libraries/xz-embedded/src/xz_private.h b/libraries/xz-embedded/src/xz_private.h
index 1b616430d9..facdca0b24 100644
--- a/libraries/xz-embedded/src/xz_private.h
+++ b/libraries/xz-embedded/src/xz_private.h
@@ -1,4 +1,5 @@
-/*
+/* SPDX-License-Identifier: Unlicense
+ * SPDX-FileCopyrightText: N/A
  * Private includes and definitions
  *
  * Author: Lasse Collin <lasse.collin@tukaani.org>
diff --git a/libraries/xz-embedded/src/xz_stream.h b/libraries/xz-embedded/src/xz_stream.h
index b3d2c9fd69..b13cbd5a1a 100644
--- a/libraries/xz-embedded/src/xz_stream.h
+++ b/libraries/xz-embedded/src/xz_stream.h
@@ -1,4 +1,5 @@
-/*
+/* SPDX-License-Identifier: Unlicense
+ * SPDX-FileCopyrightText: N/A
  * Definitions for handling the .xz file format
  *
  * Author: Lasse Collin <lasse.collin@tukaani.org>
diff --git a/libraries/xz-embedded/xzminidec.c b/libraries/xz-embedded/xzminidec.c
index 44f60602d7..f7996dd4a6 100644
--- a/libraries/xz-embedded/xzminidec.c
+++ b/libraries/xz-embedded/xzminidec.c
@@ -1,4 +1,5 @@
-/*
+/* SPDX-License-Identifier: Unlicense
+ * SPDX-FileCopyrightText: N/A
  * Simple XZ decoder command line tool
  *
  * Author: Lasse Collin <lasse.collin@tukaani.org>