Make reuse compliant

173 files changed, 1240 insertions, 1712 deletions

diff --git a/.editorconfig b/.editorconfig
index b7eca3c..8185666 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+#
+# SPDX-License-Identifier: CC0-1.0
+
 root = true
 
 [*]
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index aae555a..cb2d8b8 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+#
+# SPDX-License-Identifier: CC0-1.0
+
 name: Build
 on:
     - push
diff --git a/.github/workflows/gradle-wrapper-validation.yml b/.github/workflows/gradle-wrapper-validation.yml
index 8f19ac5..b229030 100644
--- a/.github/workflows/gradle-wrapper-validation.yml
+++ b/.github/workflows/gradle-wrapper-validation.yml
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+#
+# SPDX-License-Identifier: CC0-1.0
+
 name: "Validate Gradle Wrapper"
 on: [push, pull_request]
 
diff --git a/.gitignore b/.gitignore
index 0b1f198..8e4dc8c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+#
+# SPDX-License-Identifier: CC0-1.0
+
 .gradle
 /build/
 
diff --git a/.reuse/dep5 b/.reuse/dep5
new file mode 100644
index 0000000..d955190
--- /dev/null
+++ b/.reuse/dep5
@@ -0,0 +1,10 @@
+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Upstream-Name: Firmament
+Upstream-Contact: Linnea Gräf <nea@nea.moe>
+Source: https://github.com/romangraef/Firmament
+
+# Sample paragraph, commented out:
+#
+# Files: src/*
+# Copyright: $YEAR $NAME <$CONTACT>
+# License: ...
diff --git a/COPYING b/COPYING
deleted file mode 100644
index f288702..0000000
--- a/COPYING
+++ /dev/null
@@ -1,674 +0,0 @@
-                    GNU GENERAL PUBLIC LICENSE
-                       Version 3, 29 June 2007
-
- Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.
-
-                            Preamble
-
-  The GNU General Public License is a free, copyleft license for
-software and other kinds of works.
-
-  The licenses for most software and other practical works are designed
-to take away your freedom to share and change the works.  By contrast,
-the GNU General Public License is intended to guarantee your freedom to
-share and change all versions of a program--to make sure it remains free
-software for all its users.  We, the Free Software Foundation, use the
-GNU General Public License for most of our software; it applies also to
-any other work released this way by its authors.  You can apply it to
-your programs, too.
-
-  When we speak of free software, we are referring to freedom, not
-price.  Our General Public Licenses are designed to make sure that you
-have the freedom to distribute copies of free software (and charge for
-them if you wish), that you receive source code or can get it if you
-want it, that you can change the software or use pieces of it in new
-free programs, and that you know you can do these things.
-
-  To protect your rights, we need to prevent others from denying you
-these rights or asking you to surrender the rights.  Therefore, you have
-certain responsibilities if you distribute copies of the software, or if
-you modify it: responsibilities to respect the freedom of others.
-
-  For example, if you distribute copies of such a program, whether
-gratis or for a fee, you must pass on to the recipients the same
-freedoms that you received.  You must make sure that they, too, receive
-or can get the source code.  And you must show them these terms so they
-know their rights.
-
-  Developers that use the GNU GPL protect your rights with two steps:
-(1) assert copyright on the software, and (2) offer you this License
-giving you legal permission to copy, distribute and/or modify it.
-
-  For the developers' and authors' protection, the GPL clearly explains
-that there is no warranty for this free software.  For both users' and
-authors' sake, the GPL requires that modified versions be marked as
-changed, so that their problems will not be attributed erroneously to
-authors of previous versions.
-
-  Some devices are designed to deny users access to install or run
-modified versions of the software inside them, although the manufacturer
-can do so.  This is fundamentally incompatible with the aim of
-protecting users' freedom to change the software.  The systematic
-pattern of such abuse occurs in the area of products for individuals to
-use, which is precisely where it is most unacceptable.  Therefore, we
-have designed this version of the GPL to prohibit the practice for those
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-stand ready to extend this provision to those domains in future versions
-of the GPL, as needed to protect the freedom of users.
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-  Finally, every program is threatened constantly by software patents.
-States should not allow patents to restrict development and use of
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-
-  The precise terms and conditions for copying, distribution and
-modification follow.
-
-                       TERMS AND CONDITIONS
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-not convey it at all.  For example, if you agree to terms that obligate you
-to collect a royalty for further conveying from those to whom you convey
-the Program, the only way you could satisfy both those terms and this
-License would be to refrain entirely from conveying the Program.
-
-  13. Use with the GNU Affero General Public License.
-
-  Notwithstanding any other provision of this License, you have
-permission to link or combine any covered work with a work licensed
-under version 3 of the GNU Affero General Public License into a single
-combined work, and to convey the resulting work.  The terms of this
-License will continue to apply to the part which is the covered work,
-but the special requirements of the GNU Affero General Public License,
-section 13, concerning interaction through a network will apply to the
-combination as such.
-
-  14. Revised Versions of this License.
-
-  The Free Software Foundation may publish revised and/or new versions of
-the GNU General Public License from time to time.  Such new versions will
-be similar in spirit to the present version, but may differ in detail to
-address new problems or concerns.
-
-  Each version is given a distinguishing version number.  If the
-Program specifies that a certain numbered version of the GNU General
-Public License "or any later version" applies to it, you have the
-option of following the terms and conditions either of that numbered
-version or of any later version published by the Free Software
-Foundation.  If the Program does not specify a version number of the
-GNU General Public License, you may choose any version ever published
-by the Free Software Foundation.
-
-  If the Program specifies that a proxy can decide which future
-versions of the GNU General Public License can be used, that proxy's
-public statement of acceptance of a version permanently authorizes you
-to choose that version for the Program.
-
-  Later license versions may give you additional or different
-permissions.  However, no additional obligations are imposed on any
-author or copyright holder as a result of your choosing to follow a
-later version.
-
-  15. Disclaimer of Warranty.
-
-  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
-APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
-HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
-OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
-THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
-IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
-ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
-
-  16. Limitation of Liability.
-
-  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
-THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
-GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
-USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
-DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
-PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
-EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
-SUCH DAMAGES.
-
-  17. Interpretation of Sections 15 and 16.
-
-  If the disclaimer of warranty and limitation of liability provided
-above cannot be given local legal effect according to their terms,
-reviewing courts shall apply local law that most closely approximates
-an absolute waiver of all civil liability in connection with the
-Program, unless a warranty or assumption of liability accompanies a
-copy of the Program in return for a fee.
-
-                     END OF TERMS AND CONDITIONS
-
-            How to Apply These Terms to Your New Programs
-
-  If you develop a new program, and you want it to be of the greatest
-possible use to the public, the best way to achieve this is to make it
-free software which everyone can redistribute and change under these terms.
-
-  To do so, attach the following notices to the program.  It is safest
-to attach them to the start of each source file to most effectively
-state the exclusion of warranty; and each file should have at least
-the "copyright" line and a pointer to where the full notice is found.
-
-    <one line to give the program's name and a brief idea of what it does.>
-    Copyright (C) <year>  <name of author>
-
-    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/>.
-
-Also add information on how to contact you by electronic and paper mail.
-
-  If the program does terminal interaction, make it output a short
-notice like this when it starts in an interactive mode:
-
-    <program>  Copyright (C) <year>  <name of author>
-    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
-    This is free software, and you are welcome to redistribute it
-    under certain conditions; type `show c' for details.
-
-The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License.  Of course, your program's commands
-might be different; for a GUI interface, you would use an "about box".
-
-  You should also get your employer (if you work as a programmer) or school,
-if any, to sign a "copyright disclaimer" for the program, if necessary.
-For more information on this, and how to apply and follow the GNU GPL, see
-<https://www.gnu.org/licenses/>.
-
-  The GNU General Public License does not permit incorporating your program
-into proprietary programs.  If your program is a subroutine library, you
-may consider it more useful to permit linking proprietary applications with
-the library.  If this is what you want to do, use the GNU Lesser General
-Public License instead of this License.  But first, please read
-<https://www.gnu.org/licenses/why-not-lgpl.html>.
diff --git a/HEADER b/HEADER
deleted file mode 100644
index e38ba48..0000000
--- a/HEADER
+++ /dev/null
@@ -1,15 +0,0 @@
-Firmament is a Hypixel Skyblock mod for modern Minecraft versions
-Copyright (C) ${year} ${name}
-
-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/>.
diff --git a/LICENSES/Apache-2.0.txt b/LICENSES/Apache-2.0.txt
new file mode 100644
index 0000000..137069b
--- /dev/null
+++ b/LICENSES/Apache-2.0.txt
@@ -0,0 +1,73 @@
+Apache License
+Version 2.0, January 2004
+http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+1. Definitions.
+
+"License" shall mean the terms and conditions for use, reproduction, and distribution as defined by Sections 1 through 9 of this document.
+
+"Licensor" shall mean the copyright owner or entity authorized by the copyright owner that is granting the License.
+
+"Legal Entity" shall mean the union of the acting entity and all other entities that control, are controlled by, or are under common control with that entity. For the purposes of this definition, "control" means (i) the power, direct or indirect, to cause the direction or management of such entity, whether by contract or otherwise, or (ii) ownership of fifty percent (50%) or more of the outstanding shares, or (iii) beneficial ownership of such entity.
+
+"You" (or "Your") shall mean an individual or Legal Entity exercising permissions granted by this License.
+
+"Source" form shall mean the preferred form for making modifications, including but not limited to software source code, documentation source, and configuration files.
+
+"Object" form shall mean any form resulting from mechanical transformation or translation of a Source form, including but not limited to compiled object code, generated documentation, and conversions to other media types.
+
+"Work" shall mean the work of authorship, whether in Source or Object form, made available under the License, as indicated by a copyright notice that is included in or attached to the work (an example is provided in the Appendix below).
+
+"Derivative Works" shall mean any work, whether in Source or Object form, that is based on (or derived from) the Work and for which the editorial revisions, annotations, elaborations, or other modifications represent, as a whole, an original work of authorship. For the purposes of this License, Derivative Works shall not include works that remain separable from, or merely link (or bind by name) to the interfaces of, the Work and Derivative Works thereof.
+
+"Contribution" shall mean any work of authorship, including the original version of the Work and any modifications or additions to that Work or Derivative Works thereof, that is intentionally submitted to Licensor for inclusion in the Work by the copyright owner or by an individual or Legal Entity authorized to submit on behalf of the copyright owner. For the purposes of this definition, "submitted" means any form of electronic, verbal, or written communication sent to the Licensor or its representatives, including but not limited to communication on electronic mailing lists, source code control systems, and issue tracking systems that are managed by, or on behalf of, the Licensor for the purpose of discussing and improving the Work, but excluding communication that is conspicuously marked or otherwise designated in writing by the copyright owner as "Not a Contribution."
+
+"Contributor" shall mean Licensor and any individual or Legal Entity on behalf of whom a Contribution has been received by Licensor and subsequently incorporated within the Work.
+
+2. Grant of Copyright License. Subject to the terms and conditions of this License, each Contributor hereby grants to You a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare Derivative Works of, publicly display, publicly perform, sublicense, and distribute the Work and such Derivative Works in Source or Object form.
+
+3. Grant of Patent License. Subject to the terms and conditions of this License, each Contributor hereby grants to You a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable (except as stated in this section) patent license to make, have made, use, offer to sell, sell, import, and otherwise transfer the Work, where such license applies only to those patent claims licensable by such Contributor that are necessarily infringed by their Contribution(s) alone or by combination of their Contribution(s) with the Work to which such Contribution(s) was submitted. If You institute patent litigation against any entity (including a cross-claim or counterclaim in a lawsuit) alleging that the Work or a Contribution incorporated within the Work constitutes direct or contributory patent infringement, then any patent licenses granted to You under this License for that Work shall terminate as of the date such litigation is filed.
+
+4. Redistribution. You may reproduce and distribute copies of the Work or Derivative Works thereof in any medium, with or without modifications, and in Source or Object form, provided that You meet the following conditions:
+
+     (a) You must give any other recipients of the Work or Derivative Works a copy of this License; and
+
+     (b) You must cause any modified files to carry prominent notices stating that You changed the files; and
+
+     (c) You must retain, in the Source form of any Derivative Works that You distribute, all copyright, patent, trademark, and attribution notices from the Source form of the Work, excluding those notices that do not pertain to any part of the Derivative Works; and
+
+     (d) If the Work includes a "NOTICE" text file as part of its distribution, then any Derivative Works that You distribute must include a readable copy of the attribution notices contained within such NOTICE file, excluding those notices that do not pertain to any part of the Derivative Works, in at least one of the following places: within a NOTICE text file distributed as part of the Derivative Works; within the Source form or documentation, if provided along with the Derivative Works; or, within a display generated by the Derivative Works, if and wherever such third-party notices normally appear. The contents of the NOTICE file are for informational purposes only and do not modify the License. You may add Your own attribution notices within Derivative Works that You distribute, alongside or as an addendum to the NOTICE text from the Work, provided that such additional attribution notices cannot be construed as modifying the License.
+
+     You may add Your own copyright statement to Your modifications and may provide additional or different license terms and conditions for use, reproduction, or distribution of Your modifications, or for any such Derivative Works as a whole, provided Your use, reproduction, and distribution of the Work otherwise complies with the conditions stated in this License.
+
+5. Submission of Contributions. Unless You explicitly state otherwise, any Contribution intentionally submitted for inclusion in the Work by You to the Licensor shall be under the terms and conditions of this License, without any additional terms or conditions. Notwithstanding the above, nothing herein shall supersede or modify the terms of any separate license agreement you may have executed with Licensor regarding such Contributions.
+
+6. Trademarks. This License does not grant permission to use the trade names, trademarks, service marks, or product names of the Licensor, except as required for reasonable and customary use in describing the origin of the Work and reproducing the content of the NOTICE file.
+
+7. Disclaimer of Warranty. Unless required by applicable law or agreed to in writing, Licensor provides the Work (and each Contributor provides its Contributions) on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied, including, without limitation, any warranties or conditions of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A PARTICULAR PURPOSE. You are solely responsible for determining the appropriateness of using or redistributing the Work and assume any risks associated with Your exercise of permissions under this License.
+
+8. Limitation of Liability. In no event and under no legal theory, whether in tort (including negligence), contract, or otherwise, unless required by applicable law (such as deliberate and grossly negligent acts) or agreed to in writing, shall any Contributor be liable to You for damages, including any direct, indirect, special, incidental, or consequential damages of any character arising as a result of this License or out of the use or inability to use the Work (including but not limited to damages for loss of goodwill, work stoppage, computer failure or malfunction, or any and all other commercial damages or losses), even if such Contributor has been advised of the possibility of such damages.
+
+9. Accepting Warranty or Additional Liability. While redistributing the Work or Derivative Works thereof, You may choose to offer, and charge a fee for, acceptance of support, warranty, indemnity, or other liability obligations and/or rights consistent with this License. However, in accepting such obligations, You may act only on Your own behalf and on Your sole responsibility, not on behalf of any other Contributor, and only if You agree to indemnify, defend, and hold each Contributor harmless for any liability incurred by, or claims asserted against, such Contributor by reason of your accepting any such warranty or additional liability.
+
+END OF TERMS AND CONDITIONS
+
+APPENDIX: How to apply the Apache License to your work.
+
+To apply the Apache License to your work, attach the following boilerplate notice, with the fields enclosed by brackets "[]" replaced with your own identifying information. (Don't include the brackets!)  The text should be enclosed in the appropriate comment syntax for the file format. We also recommend that a file or class name and description of purpose be included on the same "printed page" as the copyright notice for easier identification within third-party archives.
+
+Copyright [yyyy] [name of copyright owner]
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
diff --git a/LICENSES/CC-BY-4.0.txt b/LICENSES/CC-BY-4.0.txt
new file mode 100644
index 0000000..13ca539
--- /dev/null
+++ b/LICENSES/CC-BY-4.0.txt
@@ -0,0 +1,156 @@
+Creative Commons Attribution 4.0 International
+
+ Creative Commons Corporation (“Creative Commons”) is not a law firm and does not provide legal services or legal advice. Distribution of Creative Commons public licenses does not create a lawyer-client or other relationship. Creative Commons makes its licenses and related information available on an “as-is” basis. Creative Commons gives no warranties regarding its licenses, any material licensed under their terms and conditions, or any related information. Creative Commons disclaims all liability for damages resulting from their use to the fullest extent possible.
+
+Using Creative Commons Public Licenses
+
+Creative Commons public licenses provide a standard set of terms and conditions that creators and other rights holders may use to share original works of authorship and other material subject to copyright and certain other rights specified in the public license below. The following considerations are for informational purposes only, are not exhaustive, and do not form part of our licenses.
+
+Considerations for licensors: Our public licenses are intended for use by those authorized to give the public permission to use material in ways otherwise restricted by copyright and certain other rights. Our licenses are irrevocable. Licensors should read and understand the terms and conditions of the license they choose before applying it. Licensors should also secure all rights necessary before applying our licenses so that the public can reuse the material as expected. Licensors should clearly mark any material not subject to the license. This includes other CC-licensed material, or material used under an exception or limitation to copyright. More considerations for licensors.
+
+Considerations for the public: By using one of our public licenses, a licensor grants the public permission to use the licensed material under specified terms and conditions. If the licensor’s permission is not necessary for any reason–for example, because of any applicable exception or limitation to copyright–then that use is not regulated by the license. Our licenses grant only permissions under copyright and certain other rights that a licensor has authority to grant. Use of the licensed material may still be restricted for other reasons, including because others have copyright or other rights in the material. A licensor may make special requests, such as asking that all changes be marked or described. Although not required by our licenses, you are encouraged to respect those requests where reasonable. More considerations for the public.
+
+Creative Commons Attribution 4.0 International Public License
+
+By exercising the Licensed Rights (defined below), You accept and agree to be bound by the terms and conditions of this Creative Commons Attribution 4.0 International Public License ("Public License"). To the extent this Public License may be interpreted as a contract, You are granted the Licensed Rights in consideration of Your acceptance of these terms and conditions, and the Licensor grants You such rights in consideration of benefits the Licensor receives from making the Licensed Material available under these terms and conditions.
+
+Section 1 – Definitions.
+
+     a.	Adapted Material means material subject to Copyright and Similar Rights that is derived from or based upon the Licensed Material and in which the Licensed Material is translated, altered, arranged, transformed, or otherwise modified in a manner requiring permission under the Copyright and Similar Rights held by the Licensor. For purposes of this Public License, where the Licensed Material is a musical work, performance, or sound recording, Adapted Material is always produced where the Licensed Material is synched in timed relation with a moving image.
+
+     b.	Adapter's License means the license You apply to Your Copyright and Similar Rights in Your contributions to Adapted Material in accordance with the terms and conditions of this Public License.
+
+     c.	Copyright and Similar Rights means copyright and/or similar rights closely related to copyright including, without limitation, performance, broadcast, sound recording, and Sui Generis Database Rights, without regard to how the rights are labeled or categorized. For purposes of this Public License, the rights specified in Section 2(b)(1)-(2) are not Copyright and Similar Rights.
+
+     d.	Effective Technological Measures means those measures that, in the absence of proper authority, may not be circumvented under laws fulfilling obligations under Article 11 of the WIPO Copyright Treaty adopted on December 20, 1996, and/or similar international agreements.
+
+     e.	Exceptions and Limitations means fair use, fair dealing, and/or any other exception or limitation to Copyright and Similar Rights that applies to Your use of the Licensed Material.
+
+     f.	Licensed Material means the artistic or literary work, database, or other material to which the Licensor applied this Public License.
+
+     g.	Licensed Rights means the rights granted to You subject to the terms and conditions of this Public License, which are limited to all Copyright and Similar Rights that apply to Your use of the Licensed Material and that the Licensor has authority to license.
+
+     h.	Licensor means the individual(s) or entity(ies) granting rights under this Public License.
+
+     i.	Share means to provide material to the public by any means or process that requires permission under the Licensed Rights, such as reproduction, public display, public performance, distribution, dissemination, communication, or importation, and to make material available to the public including in ways that members of the public may access the material from a place and at a time individually chosen by them.
+
+     j.	Sui Generis Database Rights means rights other than copyright resulting from Directive 96/9/EC of the European Parliament and of the Council of 11 March 1996 on the legal protection of databases, as amended and/or succeeded, as well as other essentially equivalent rights anywhere in the world.
+
+     k.	You means the individual or entity exercising the Licensed Rights under this Public License. Your has a corresponding meaning.
+
+Section 2 – Scope.
+
+     a.	License grant.
+
+          1. Subject to the terms and conditions of this Public License, the Licensor hereby grants You a worldwide, royalty-free, non-sublicensable, non-exclusive, irrevocable license to exercise the Licensed Rights in the Licensed Material to:
+
+               A. reproduce and Share the Licensed Material, in whole or in part; and
+
+               B. produce, reproduce, and Share Adapted Material.
+
+          2. Exceptions and Limitations. For the avoidance of doubt, where Exceptions and Limitations apply to Your use, this Public License does not apply, and You do not need to comply with its terms and conditions.
+
+          3. Term. The term of this Public License is specified in Section 6(a).
+
+          4. Media and formats; technical modifications allowed. The Licensor authorizes You to exercise the Licensed Rights in all media and formats whether now known or hereafter created, and to make technical modifications necessary to do so. The Licensor waives and/or agrees not to assert any right or authority to forbid You from making technical modifications necessary to exercise the Licensed Rights, including technical modifications necessary to circumvent Effective Technological Measures. For purposes of this Public License, simply making modifications authorized by this Section 2(a)(4) never produces Adapted Material.
+
+          5. Downstream recipients.
+
+               A. Offer from the Licensor – Licensed Material. Every recipient of the Licensed Material automatically receives an offer from the Licensor to exercise the Licensed Rights under the terms and conditions of this Public License.
+
+               B. No downstream restrictions. You may not offer or impose any additional or different terms or conditions on, or apply any Effective Technological Measures to, the Licensed Material if doing so restricts exercise of the Licensed Rights by any recipient of the Licensed Material.
+
+          6.  No endorsement. Nothing in this Public License constitutes or may be construed as permission to assert or imply that You are, or that Your use of the Licensed Material is, connected with, or sponsored, endorsed, or granted official status by, the Licensor or others designated to receive attribution as provided in Section 3(a)(1)(A)(i).
+
+b. Other rights.
+
+          1. Moral rights, such as the right of integrity, are not licensed under this Public License, nor are publicity, privacy, and/or other similar personality rights; however, to the extent possible, the Licensor waives and/or agrees not to assert any such rights held by the Licensor to the limited extent necessary to allow You to exercise the Licensed Rights, but not otherwise.
+
+          2. Patent and trademark rights are not licensed under this Public License.
+
+          3. To the extent possible, the Licensor waives any right to collect royalties from You for the exercise of the Licensed Rights, whether directly or through a collecting society under any voluntary or waivable statutory or compulsory licensing scheme. In all other cases the Licensor expressly reserves any right to collect such royalties.
+
+Section 3 – License Conditions.
+
+Your exercise of the Licensed Rights is expressly made subject to the following conditions.
+
+     a.	Attribution.
+
+          1. If You Share the Licensed Material (including in modified form), You must:
+
+               A. retain the following if it is supplied by the Licensor with the Licensed Material:
+
+                    i. identification of the creator(s) of the Licensed Material and any others designated to receive attribution, in any reasonable manner requested by the Licensor (including by pseudonym if designated);
+
+                    ii. a copyright notice;
+
+                    iii. a notice that refers to this Public License;
+
+                    iv.	a notice that refers to the disclaimer of warranties;
+
+                    v. a URI or hyperlink to the Licensed Material to the extent reasonably practicable;
+
+               B. indicate if You modified the Licensed Material and retain an indication of any previous modifications; and
+
+               C. indicate the Licensed Material is licensed under this Public License, and include the text of, or the URI or hyperlink to, this Public License.
+
+          2. You may satisfy the conditions in Section 3(a)(1) in any reasonable manner based on the medium, means, and context in which You Share the Licensed Material. For example, it may be reasonable to satisfy the conditions by providing a URI or hyperlink to a resource that includes the required information.
+
+          3. If requested by the Licensor, You must remove any of the information required by Section 3(a)(1)(A) to the extent reasonably practicable.
+
+          4. If You Share Adapted Material You produce, the Adapter's License You apply must not prevent recipients of the Adapted Material from complying with this Public License.
+
+Section 4 – Sui Generis Database Rights.
+
+Where the Licensed Rights include Sui Generis Database Rights that apply to Your use of the Licensed Material:
+
+     a.	for the avoidance of doubt, Section 2(a)(1) grants You the right to extract, reuse, reproduce, and Share all or a substantial portion of the contents of the database;
+
+     b.	if You include all or a substantial portion of the database contents in a database in which You have Sui Generis Database Rights, then the database in which You have Sui Generis Database Rights (but not its individual contents) is Adapted Material; and
+
+     c.	You must comply with the conditions in Section 3(a) if You Share all or a substantial portion of the contents of the database.
+For the avoidance of doubt, this Section 4 supplements and does not replace Your obligations under this Public License where the Licensed Rights include other Copyright and Similar Rights.
+
+Section 5 – Disclaimer of Warranties and Limitation of Liability.
+
+     a.	Unless otherwise separately undertaken by the Licensor, to the extent possible, the Licensor offers the Licensed Material as-is and as-available, and makes no representations or warranties of any kind concerning the Licensed Material, whether express, implied, statutory, or other. This includes, without limitation, warranties of title, merchantability, fitness for a particular purpose, non-infringement, absence of latent or other defects, accuracy, or the presence or absence of errors, whether or not known or discoverable. Where disclaimers of warranties are not allowed in full or in part, this disclaimer may not apply to You.
+
+     b.	To the extent possible, in no event will the Licensor be liable to You on any legal theory (including, without limitation, negligence) or otherwise for any direct, special, indirect, incidental, consequential, punitive, exemplary, or other losses, costs, expenses, or damages arising out of this Public License or use of the Licensed Material, even if the Licensor has been advised of the possibility of such losses, costs, expenses, or damages. Where a limitation of liability is not allowed in full or in part, this limitation may not apply to You.
+
+     c.	The disclaimer of warranties and limitation of liability provided above shall be interpreted in a manner that, to the extent possible, most closely approximates an absolute disclaimer and waiver of all liability.
+
+Section 6 – Term and Termination.
+
+     a.	This Public License applies for the term of the Copyright and Similar Rights licensed here. However, if You fail to comply with this Public License, then Your rights under this Public License terminate automatically.
+
+     b.	Where Your right to use the Licensed Material has terminated under Section 6(a), it reinstates:
+
+          1. automatically as of the date the violation is cured, provided it is cured within 30 days of Your discovery of the violation; or
+
+          2. upon express reinstatement by the Licensor.
+
+     c.	For the avoidance of doubt, this Section 6(b) does not affect any right the Licensor may have to seek remedies for Your violations of this Public License.
+
+     d.	For the avoidance of doubt, the Licensor may also offer the Licensed Material under separate terms or conditions or stop distributing the Licensed Material at any time; however, doing so will not terminate this Public License.
+
+     e.	Sections 1, 5, 6, 7, and 8 survive termination of this Public License.
+
+Section 7 – Other Terms and Conditions.
+
+     a.	The Licensor shall not be bound by any additional or different terms or conditions communicated by You unless expressly agreed.
+
+     b.	Any arrangements, understandings, or agreements regarding the Licensed Material not stated herein are separate from and independent of the terms and conditions of this Public License.
+
+Section 8 – Interpretation.
+
+     a.	For the avoidance of doubt, this Public License does not, and shall not be interpreted to, reduce, limit, restrict, or impose conditions on any use of the Licensed Material that could lawfully be made without permission under this Public License.
+
+     b.	To the extent possible, if any provision of this Public License is deemed unenforceable, it shall be automatically reformed to the minimum extent necessary to make it enforceable. If the provision cannot be reformed, it shall be severed from this Public License without affecting the enforceability of the remaining terms and conditions.
+
+     c.	No term or condition of this Public License will be waived and no failure to comply consented to unless expressly agreed to by the Licensor.
+
+     d.	Nothing in this Public License constitutes or may be interpreted as a limitation upon, or waiver of, any privileges and immunities that apply to the Licensor or You, including from the legal processes of any jurisdiction or authority.
+
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diff --git a/LICENSES/CC0-1.0.txt b/LICENSES/CC0-1.0.txt
new file mode 100644
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--- /dev/null
+++ b/LICENSES/CC0-1.0.txt
@@ -0,0 +1,121 @@
+Creative Commons Legal Code
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diff --git a/LICENSES/GPL-3.0-or-later.txt b/LICENSES/GPL-3.0-or-later.txt
new file mode 100644
index 0000000..f6cdd22
--- /dev/null
+++ b/LICENSES/GPL-3.0-or-later.txt
@@ -0,0 +1,232 @@
+GNU GENERAL PUBLIC LICENSE
+Version 3, 29 June 2007
+
+Copyright © 2007 Free Software Foundation, Inc. <https://fsf.org/>
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+Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.
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+The licenses for most software and other practical works are designed to take away your freedom to share and change the works. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change all versions of a program--to make sure it remains free software for all its users. We, the Free Software Foundation, use the GNU General Public License for most of our software; it applies also to any other work released this way by its authors. You can apply it to your programs, too.
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+“This License” refers to version 3 of the GNU General Public License.
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+“Copyright” also means copyright-like laws that apply to other kinds of works, such as semiconductor masks.
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+
+7. Additional Terms.
+“Additional permissions” are terms that supplement the terms of this License by making exceptions from one or more of its conditions. Additional permissions that are applicable to the entire Program shall be treated as though they were included in this License, to the extent that they are valid under applicable law. If additional permissions apply only to part of the Program, that part may be used separately under those permissions, but the entire Program remains governed by this License without regard to the additional permissions.
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+You may not propagate or modify a covered work except as expressly provided under this License. Any attempt otherwise to propagate or modify it is void, and will automatically terminate your rights under this License (including any patent licenses granted under the third paragraph of section 11).
+
+However, if you cease all violation of this License, then your license from a particular copyright holder is reinstated (a) provisionally, unless and until the copyright holder explicitly and finally terminates your license, and (b) permanently, if the copyright holder fails to notify you of the violation by some reasonable means prior to 60 days after the cessation.
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+9. Acceptance Not Required for Having Copies.
+You are not required to accept this License in order to receive or run a copy of the Program. Ancillary propagation of a covered work occurring solely as a consequence of using peer-to-peer transmission to receive a copy likewise does not require acceptance. However, nothing other than this License grants you permission to propagate or modify any covered work. These actions infringe copyright if you do not accept this License. Therefore, by modifying or propagating a covered work, you indicate your acceptance of this License to do so.
+
+10. Automatic Licensing of Downstream Recipients.
+Each time you convey a covered work, the recipient automatically receives a license from the original licensors, to run, modify and propagate that work, subject to this License. You are not responsible for enforcing compliance by third parties with this License.
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+
+11. Patents.
+A “contributor” is a copyright holder who authorizes use under this License of the Program or a work on which the Program is based. The work thus licensed is called the contributor's “contributor version”.
+
+A contributor's “essential patent claims” are all patent claims owned or controlled by the contributor, whether already acquired or hereafter acquired, that would be infringed by some manner, permitted by this License, of making, using, or selling its contributor version, but do not include claims that would be infringed only as a consequence of further modification of the contributor version. For purposes of this definition, “control” includes the right to grant patent sublicenses in a manner consistent with the requirements of this License.
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+In the following three paragraphs, a “patent license” is any express agreement or commitment, however denominated, not to enforce a patent (such as an express permission to practice a patent or covenant not to sue for patent infringement). To “grant” such a patent license to a party means to make such an agreement or commitment not to enforce a patent against the party.
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+If you convey a covered work, knowingly relying on a patent license, and the Corresponding Source of the work is not available for anyone to copy, free of charge and under the terms of this License, through a publicly available network server or other readily accessible means, then you must either (1) cause the Corresponding Source to be so available, or (2) arrange to deprive yourself of the benefit of the patent license for this particular work, or (3) arrange, in a manner consistent with the requirements of this License, to extend the patent license to downstream recipients. “Knowingly relying” means you have actual knowledge that, but for the patent license, your conveying the covered work in a country, or your recipient's use of the covered work in a country, would infringe one or more identifiable patents in that country that you have reason to believe are valid.
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+
+A patent license is “discriminatory” if it does not include within the scope of its coverage, prohibits the exercise of, or is conditioned on the non-exercise of one or more of the rights that are specifically granted under this License. You may not convey a covered work if you are a party to an arrangement with a third party that is in the business of distributing software, under which you make payment to the third party based on the extent of your activity of conveying the work, and under which the third party grants, to any of the parties who would receive the covered work from you, a discriminatory patent license (a) in connection with copies of the covered work conveyed by you (or copies made from those copies), or (b) primarily for and in connection with specific products or compilations that contain the covered work, unless you entered into that arrangement, or that patent license was granted, prior to 28 March 2007.
+
+Nothing in this License shall be construed as excluding or limiting any implied license or other defenses to infringement that may otherwise be available to you under applicable patent law.
+
+12. No Surrender of Others' Freedom.
+If conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of this License. If you cannot convey a covered work so as to satisfy simultaneously your obligations under this License and any other pertinent obligations, then as a consequence you may not convey it at all. For example, if you agree to terms that obligate you to collect a royalty for further conveying from those to whom you convey the Program, the only way you could satisfy both those terms and this License would be to refrain entirely from conveying the Program.
+
+13. Use with the GNU Affero General Public License.
+Notwithstanding any other provision of this License, you have permission to link or combine any covered work with a work licensed under version 3 of the GNU Affero General Public License into a single combined work, and to convey the resulting work. The terms of this License will continue to apply to the part which is the covered work, but the special requirements of the GNU Affero General Public License, section 13, concerning interaction through a network will apply to the combination as such.
+
+14. Revised Versions of this License.
+The Free Software Foundation may publish revised and/or new versions of the GNU General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns.
+
+Each version is given a distinguishing version number. If the Program specifies that a certain numbered version of the GNU General Public License “or any later version” applies to it, you have the option of following the terms and conditions either of that numbered version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of the GNU General Public License, you may choose any version ever published by the Free Software Foundation.
+
+If the Program specifies that a proxy can decide which future versions of the GNU General Public License can be used, that proxy's public statement of acceptance of a version permanently authorizes you to choose that version for the Program.
+
+Later license versions may give you additional or different permissions. However, no additional obligations are imposed on any author or copyright holder as a result of your choosing to follow a later version.
+
+15. Disclaimer of Warranty.
+THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+16. Limitation of Liability.
+IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+
+17. Interpretation of Sections 15 and 16.
+If the disclaimer of warranty and limitation of liability provided above cannot be given local legal effect according to their terms, reviewing courts shall apply local law that most closely approximates an absolute waiver of all civil liability in connection with the Program, unless a warranty or assumption of liability accompanies a copy of the Program in return for a fee.
+
+END OF TERMS AND CONDITIONS
+
+How to Apply These Terms to Your New Programs
+
+If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms.
+
+To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively state the exclusion of warranty; and each file should have at least the “copyright” line and a pointer to where the full notice is found.
+
+     <one line to give the program's name and a brief idea of what it does.>
+     Copyright (C) <year>  <name of author>
+
+     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/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program does terminal interaction, make it output a short notice like this when it starts in an interactive mode:
+
+     <program>  Copyright (C) <year>  <name of author>
+     This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+     This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, your program's commands might be different; for a GUI interface, you would use an “about box”.
+
+You should also get your employer (if you work as a programmer) or school, if any, to sign a “copyright disclaimer” for the program, if necessary. For more information on this, and how to apply and follow the GNU GPL, see <https://www.gnu.org/licenses/>.
+
+The GNU General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Lesser General Public License instead of this License. But first, please read <https://www.gnu.org/philosophy/why-not-lgpl.html>.
diff --git a/README.md b/README.md
index 7c357fd..f560e0c 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,9 @@
+<!--
+SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+
+SPDX-License-Identifier: CC0-1.0
+-->
+
 # Firmament
 <small><i>Powered by NEU</i></small>
 
diff --git a/TODO.txt b/TODO.txt
index 6664108..77314c8 100644
--- a/TODO.txt
+++ b/TODO.txt
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+#
+# SPDX-License-Identifier: CC0-1.0
+
 Prio 0 (Bugs):
 - WorldReadyEvent buggy? -> out of date locraw
 
diff --git a/build.gradle.kts b/build.gradle.kts
index 3f60237..bd5b0bc 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+//
+// SPDX-License-Identifier: CC0-1.0
+
 import moe.nea.licenseextractificator.LicenseDiscoveryTask
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
diff --git a/buildSrc/build.gradle.kts b/buildSrc/build.gradle.kts
index e36ebc8..ae3f861 100644
--- a/buildSrc/build.gradle.kts
+++ b/buildSrc/build.gradle.kts
@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+//
+// SPDX-License-Identifier: CC0-1.0
+
 plugins {
     kotlin("jvm") version "1.8.10"
     `kotlin-dsl`
diff --git a/buildSrc/src/licenseinfo.kt b/buildSrc/src/licenseinfo.kt
index 0e4a6c3..85ef54c 100644
--- a/buildSrc/src/licenseinfo.kt
+++ b/buildSrc/src/licenseinfo.kt
@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+//
+// SPDX-License-Identifier: CC0-1.0
+
 import moe.nea.licenseextractificator.LicenseExtension
 
 fun LicenseExtension.addExtraLicenseMatchers() {
diff --git a/gradle.properties b/gradle.properties
index f266cde..81c9c76 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,3 +1,6 @@
+# SPDX-FileCopyrightText: 2023 Linnea Gr�f <nea@nea.moe>
+#
+# SPDX-License-Identifier: CC0-1.0
 # suppress inspection "UnusedProperty" for whole file
 org.gradle.jvmargs=-Xmx4096M
 
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index e9630b9..c21ece5 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+#
+# SPDX-License-Identifier: CC0-1.0
+
 [versions]
 minecraft = "1.20"
 fabric_loader = "0.14.21"
diff --git a/gradle/wrapper/gradle-wrapper.jar.license b/gradle/wrapper/gradle-wrapper.jar.license
new file mode 100644
index 0000000..9d85393
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.jar.license
@@ -0,0 +1,3 @@
+SPDX-FileCopyrightText: 2023 Gradle, Inc.
+
+SPDX-License-Identifier: Apache-2.0
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index fae0804..1a9ecf9 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2023 Gradle, Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 distributionUrl=https\://services.gradle.org/distributions/gradle-8.1.1-bin.zip
diff --git a/gradlew b/gradlew
index 1b6c787..bc899af 100755
--- a/gradlew
+++ b/gradlew
@@ -1,20 +1,9 @@
 #!/bin/sh
 
-#
 # Copyright © 2015-2021 the original authors.
+# SPDX-FileCopyrightText: 2023 Gradle, Inc.
 #
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
+# SPDX-License-Identifier: Apache-2.0
 
 ##############################################################################
 #
diff --git a/gradlew.bat b/gradlew.bat
index 107acd3..05b887c 100644
--- a/gradlew.bat
+++ b/gradlew.bat
@@ -1,3 +1,7 @@
+REM SPDX-FileCopyrightText: 2023 Gradle, Inc.
+REM
+REM SPDX-License-Identifier: Apache-2.0
+
 @rem
 @rem Copyright 2015 the original author or authors.
 @rem
diff --git a/settings.gradle.kts b/settings.gradle.kts
index 20ceb08..bee19d4 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+//
+// SPDX-License-Identifier: CC0-1.0
+
 pluginManagement {
     repositories {
         mavenLocal()
diff --git a/src/main/java/moe/nea/firmament/init/MixinPlugin.java b/src/main/java/moe/nea/firmament/init/MixinPlugin.java
index 7d979ae..eba29f4 100644
--- a/src/main/java/moe/nea/firmament/init/MixinPlugin.java
+++ b/src/main/java/moe/nea/firmament/init/MixinPlugin.java
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.init;
diff --git a/src/main/java/moe/nea/firmament/mixins/MixinChatHud.java b/src/main/java/moe/nea/firmament/mixins/MixinChatHud.java
index 13921e5..12217d2 100644
--- a/src/main/java/moe/nea/firmament/mixins/MixinChatHud.java
+++ b/src/main/java/moe/nea/firmament/mixins/MixinChatHud.java
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.mixins;
 
 import moe.nea.firmament.events.ClientChatLineReceivedEvent;
diff --git a/src/main/java/moe/nea/firmament/mixins/MixinChatScreen.java b/src/main/java/moe/nea/firmament/mixins/MixinChatScreen.java
index 4d75c44..0759163 100644
--- a/src/main/java/moe/nea/firmament/mixins/MixinChatScreen.java
+++ b/src/main/java/moe/nea/firmament/mixins/MixinChatScreen.java
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.mixins;
 
 import net.minecraft.client.gui.screen.ChatScreen;
diff --git a/src/main/java/moe/nea/firmament/mixins/MixinClientPacketHandler.java b/src/main/java/moe/nea/firmament/mixins/MixinClientPacketHandler.java
index 70fdc29..aa6ce38 100644
--- a/src/main/java/moe/nea/firmament/mixins/MixinClientPacketHandler.java
+++ b/src/main/java/moe/nea/firmament/mixins/MixinClientPacketHandler.java
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.mixins;
diff --git a/src/main/java/moe/nea/firmament/mixins/MixinClientPlayerEntity.java b/src/main/java/moe/nea/firmament/mixins/MixinClientPlayerEntity.java
index e17d9da..21e3308 100644
--- a/src/main/java/moe/nea/firmament/mixins/MixinClientPlayerEntity.java
+++ b/src/main/java/moe/nea/firmament/mixins/MixinClientPlayerEntity.java
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.mixins;
diff --git a/src/main/java/moe/nea/firmament/mixins/MixinDownloadingTerrainScreen.java b/src/main/java/moe/nea/firmament/mixins/MixinDownloadingTerrainScreen.java
index 3d0f0a4..0f23af1 100644
--- a/src/main/java/moe/nea/firmament/mixins/MixinDownloadingTerrainScreen.java
+++ b/src/main/java/moe/nea/firmament/mixins/MixinDownloadingTerrainScreen.java
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.mixins;
diff --git a/src/main/java/moe/nea/firmament/mixins/MixinEntityIdFix.java b/src/main/java/moe/nea/firmament/mixins/MixinEntityIdFix.java
index c1c9868..45c3ddd 100644
--- a/src/main/java/moe/nea/firmament/mixins/MixinEntityIdFix.java
+++ b/src/main/java/moe/nea/firmament/mixins/MixinEntityIdFix.java
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.mixins;
 
 import com.mojang.datafixers.DataFix;
diff --git a/src/main/java/moe/nea/firmament/mixins/MixinHandledScreen.java b/src/main/java/moe/nea/firmament/mixins/MixinHandledScreen.java
index 517a0eb..828f25b 100644
--- a/src/main/java/moe/nea/firmament/mixins/MixinHandledScreen.java
+++ b/src/main/java/moe/nea/firmament/mixins/MixinHandledScreen.java
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.mixins;
diff --git a/src/main/java/moe/nea/firmament/mixins/MixinItemModels.java b/src/main/java/moe/nea/firmament/mixins/MixinItemModels.java
index 2c2cc31..7e8d78b 100644
--- a/src/main/java/moe/nea/firmament/mixins/MixinItemModels.java
+++ b/src/main/java/moe/nea/firmament/mixins/MixinItemModels.java
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.mixins;
 
 import moe.nea.firmament.events.CustomItemModelEvent;
diff --git a/src/main/java/moe/nea/firmament/mixins/MixinKeyboard.java b/src/main/java/moe/nea/firmament/mixins/MixinKeyboard.java
index e302679..8307ae0 100644
--- a/src/main/java/moe/nea/firmament/mixins/MixinKeyboard.java
+++ b/src/main/java/moe/nea/firmament/mixins/MixinKeyboard.java
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.mixins;
 
 import moe.nea.firmament.events.WorldKeyboardEvent;
diff --git a/src/main/java/moe/nea/firmament/mixins/MixinMessageHandler.java b/src/main/java/moe/nea/firmament/mixins/MixinMessageHandler.java
index c86958c..867c8ea 100644
--- a/src/main/java/moe/nea/firmament/mixins/MixinMessageHandler.java
+++ b/src/main/java/moe/nea/firmament/mixins/MixinMessageHandler.java
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.mixins;
diff --git a/src/main/java/moe/nea/firmament/mixins/MixinMinecraft.java b/src/main/java/moe/nea/firmament/mixins/MixinMinecraft.java
index 8fd011d..90ecd36 100644
--- a/src/main/java/moe/nea/firmament/mixins/MixinMinecraft.java
+++ b/src/main/java/moe/nea/firmament/mixins/MixinMinecraft.java
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.mixins;
diff --git a/src/main/java/moe/nea/firmament/mixins/MixinModelLoader.java b/src/main/java/moe/nea/firmament/mixins/MixinModelLoader.java
index 8d43083..78beba2 100644
--- a/src/main/java/moe/nea/firmament/mixins/MixinModelLoader.java
+++ b/src/main/java/moe/nea/firmament/mixins/MixinModelLoader.java
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.mixins;
 
 import net.minecraft.client.MinecraftClient;
diff --git a/src/main/java/moe/nea/firmament/mixins/MixinMouse.java b/src/main/java/moe/nea/firmament/mixins/MixinMouse.java
index 19cdcd2..68dda34 100644
--- a/src/main/java/moe/nea/firmament/mixins/MixinMouse.java
+++ b/src/main/java/moe/nea/firmament/mixins/MixinMouse.java
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.mixins;
 
 import kotlin.Pair;
diff --git a/src/main/java/moe/nea/firmament/mixins/MixinPlayerInventory.java b/src/main/java/moe/nea/firmament/mixins/MixinPlayerInventory.java
index be64834..2076923 100644
--- a/src/main/java/moe/nea/firmament/mixins/MixinPlayerInventory.java
+++ b/src/main/java/moe/nea/firmament/mixins/MixinPlayerInventory.java
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.mixins;
diff --git a/src/main/java/moe/nea/firmament/mixins/MixinPlayerListEntry.java b/src/main/java/moe/nea/firmament/mixins/MixinPlayerListEntry.java
index c858db1..870aaad 100644
--- a/src/main/java/moe/nea/firmament/mixins/MixinPlayerListEntry.java
+++ b/src/main/java/moe/nea/firmament/mixins/MixinPlayerListEntry.java
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.mixins;
 
 import moe.nea.firmament.features.fixes.Fixes;
diff --git a/src/main/java/moe/nea/firmament/mixins/MixinWorldRenderer.java b/src/main/java/moe/nea/firmament/mixins/MixinWorldRenderer.java
index 94bbef4..8aa105f 100644
--- a/src/main/java/moe/nea/firmament/mixins/MixinWorldRenderer.java
+++ b/src/main/java/moe/nea/firmament/mixins/MixinWorldRenderer.java
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.mixins;
diff --git a/src/main/java/moe/nea/firmament/mixins/accessor/AccessorHandledScreen.java b/src/main/java/moe/nea/firmament/mixins/accessor/AccessorHandledScreen.java
index c5dffba..b3c9787 100644
--- a/src/main/java/moe/nea/firmament/mixins/accessor/AccessorHandledScreen.java
+++ b/src/main/java/moe/nea/firmament/mixins/accessor/AccessorHandledScreen.java
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.mixins.accessor;
diff --git a/src/main/java/moe/nea/firmament/mixins/devenv/DisableCommonPacketWarnings.java b/src/main/java/moe/nea/firmament/mixins/devenv/DisableCommonPacketWarnings.java
index e42b8f5..9fc2ab0 100644
--- a/src/main/java/moe/nea/firmament/mixins/devenv/DisableCommonPacketWarnings.java
+++ b/src/main/java/moe/nea/firmament/mixins/devenv/DisableCommonPacketWarnings.java
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.mixins.devenv;
diff --git a/src/main/java/moe/nea/firmament/mixins/devenv/DisableInvalidFishingHook.java b/src/main/java/moe/nea/firmament/mixins/devenv/DisableInvalidFishingHook.java
index 8dd8862..cb26e92 100644
--- a/src/main/java/moe/nea/firmament/mixins/devenv/DisableInvalidFishingHook.java
+++ b/src/main/java/moe/nea/firmament/mixins/devenv/DisableInvalidFishingHook.java
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.mixins.devenv;
diff --git a/src/main/java/moe/nea/firmament/mixins/devenv/MixinKeyboard.java b/src/main/java/moe/nea/firmament/mixins/devenv/MixinKeyboard.java
index b52af9b..00546c1 100644
--- a/src/main/java/moe/nea/firmament/mixins/devenv/MixinKeyboard.java
+++ b/src/main/java/moe/nea/firmament/mixins/devenv/MixinKeyboard.java
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.mixins.devenv;
 
 import moe.nea.firmament.features.debug.DeveloperFeatures;
diff --git a/src/main/java/moe/nea/firmament/mixins/devenv/MixinScoreboard.java b/src/main/java/moe/nea/firmament/mixins/devenv/MixinScoreboard.java
index 4d11608..a17ef90 100644
--- a/src/main/java/moe/nea/firmament/mixins/devenv/MixinScoreboard.java
+++ b/src/main/java/moe/nea/firmament/mixins/devenv/MixinScoreboard.java
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.mixins.devenv;
diff --git a/src/main/kotlin/moe/nea/firmament/Firmament.kt b/src/main/kotlin/moe/nea/firmament/Firmament.kt
index 741fabd..1a2739e 100644
--- a/src/main/kotlin/moe/nea/firmament/Firmament.kt
+++ b/src/main/kotlin/moe/nea/firmament/Firmament.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament
diff --git a/src/main/kotlin/moe/nea/firmament/apis/Profiles.kt b/src/main/kotlin/moe/nea/firmament/apis/Profiles.kt
index 0f014a5..083aa19 100644
--- a/src/main/kotlin/moe/nea/firmament/apis/Profiles.kt
+++ b/src/main/kotlin/moe/nea/firmament/apis/Profiles.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 @file:UseSerializers(DashlessUUIDSerializer::class, InstantAsLongSerializer::class)
 
 package moe.nea.firmament.apis
diff --git a/src/main/kotlin/moe/nea/firmament/apis/Routes.kt b/src/main/kotlin/moe/nea/firmament/apis/Routes.kt
index 7785d90..71802a5 100644
--- a/src/main/kotlin/moe/nea/firmament/apis/Routes.kt
+++ b/src/main/kotlin/moe/nea/firmament/apis/Routes.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.apis
 
 import io.ktor.client.call.body
diff --git a/src/main/kotlin/moe/nea/firmament/commands/dsl.kt b/src/main/kotlin/moe/nea/firmament/commands/dsl.kt
index 90018fa..01a3458 100644
--- a/src/main/kotlin/moe/nea/firmament/commands/dsl.kt
+++ b/src/main/kotlin/moe/nea/firmament/commands/dsl.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.commands
diff --git a/src/main/kotlin/moe/nea/firmament/commands/rome.kt b/src/main/kotlin/moe/nea/firmament/commands/rome.kt
index 11aaf17..4465459 100644
--- a/src/main/kotlin/moe/nea/firmament/commands/rome.kt
+++ b/src/main/kotlin/moe/nea/firmament/commands/rome.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.commands
diff --git a/src/main/kotlin/moe/nea/firmament/dbus/FirmamentDbusInterface.kt b/src/main/kotlin/moe/nea/firmament/dbus/FirmamentDbusInterface.kt
index c060abf..9af968d 100644
--- a/src/main/kotlin/moe/nea/firmament/dbus/FirmamentDbusInterface.kt
+++ b/src/main/kotlin/moe/nea/firmament/dbus/FirmamentDbusInterface.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.dbus
diff --git a/src/main/kotlin/moe/nea/firmament/dbus/FirmamentDbusObject.kt b/src/main/kotlin/moe/nea/firmament/dbus/FirmamentDbusObject.kt
index 236526f..4a7e008 100644
--- a/src/main/kotlin/moe/nea/firmament/dbus/FirmamentDbusObject.kt
+++ b/src/main/kotlin/moe/nea/firmament/dbus/FirmamentDbusObject.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.dbus
diff --git a/src/main/kotlin/moe/nea/firmament/events/ClientChatLineReceivedEvent.kt b/src/main/kotlin/moe/nea/firmament/events/ClientChatLineReceivedEvent.kt
index 7af411d..0345afc 100644
--- a/src/main/kotlin/moe/nea/firmament/events/ClientChatLineReceivedEvent.kt
+++ b/src/main/kotlin/moe/nea/firmament/events/ClientChatLineReceivedEvent.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.events
 
 import net.minecraft.text.Text
diff --git a/src/main/kotlin/moe/nea/firmament/events/CustomItemModelEvent.kt b/src/main/kotlin/moe/nea/firmament/events/CustomItemModelEvent.kt
index bc6a05c..cf75144 100644
--- a/src/main/kotlin/moe/nea/firmament/events/CustomItemModelEvent.kt
+++ b/src/main/kotlin/moe/nea/firmament/events/CustomItemModelEvent.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.events
 
 import java.util.*
diff --git a/src/main/kotlin/moe/nea/firmament/events/FirmamentEvent.kt b/src/main/kotlin/moe/nea/firmament/events/FirmamentEvent.kt
index 161c4c2..02fd7f3 100644
--- a/src/main/kotlin/moe/nea/firmament/events/FirmamentEvent.kt
+++ b/src/main/kotlin/moe/nea/firmament/events/FirmamentEvent.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.events
diff --git a/src/main/kotlin/moe/nea/firmament/events/FirmamentEventBus.kt b/src/main/kotlin/moe/nea/firmament/events/FirmamentEventBus.kt
index d6a7470..789fec2 100644
--- a/src/main/kotlin/moe/nea/firmament/events/FirmamentEventBus.kt
+++ b/src/main/kotlin/moe/nea/firmament/events/FirmamentEventBus.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.events
diff --git a/src/main/kotlin/moe/nea/firmament/events/HandledScreenForegroundEvent.kt b/src/main/kotlin/moe/nea/firmament/events/HandledScreenForegroundEvent.kt
index 2d4b652..d45b484 100644
--- a/src/main/kotlin/moe/nea/firmament/events/HandledScreenForegroundEvent.kt
+++ b/src/main/kotlin/moe/nea/firmament/events/HandledScreenForegroundEvent.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.events
 
 import net.minecraft.client.gui.screen.ingame.HandledScreen
diff --git a/src/main/kotlin/moe/nea/firmament/events/HandledScreenKeyPressedEvent.kt b/src/main/kotlin/moe/nea/firmament/events/HandledScreenKeyPressedEvent.kt
index 9cff27d..829d4ed 100644
--- a/src/main/kotlin/moe/nea/firmament/events/HandledScreenKeyPressedEvent.kt
+++ b/src/main/kotlin/moe/nea/firmament/events/HandledScreenKeyPressedEvent.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.events
diff --git a/src/main/kotlin/moe/nea/firmament/events/HandledScreenPushREIEvent.kt b/src/main/kotlin/moe/nea/firmament/events/HandledScreenPushREIEvent.kt
index b809513..42a6ffe 100644
--- a/src/main/kotlin/moe/nea/firmament/events/HandledScreenPushREIEvent.kt
+++ b/src/main/kotlin/moe/nea/firmament/events/HandledScreenPushREIEvent.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.events
 
 import me.shedaniel.math.Rectangle
diff --git a/src/main/kotlin/moe/nea/firmament/events/IsSlotProtectedEvent.kt b/src/main/kotlin/moe/nea/firmament/events/IsSlotProtectedEvent.kt
index d7cf467..f1a861e 100644
--- a/src/main/kotlin/moe/nea/firmament/events/IsSlotProtectedEvent.kt
+++ b/src/main/kotlin/moe/nea/firmament/events/IsSlotProtectedEvent.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.events
diff --git a/src/main/kotlin/moe/nea/firmament/events/OutgoingPacketEvent.kt b/src/main/kotlin/moe/nea/firmament/events/OutgoingPacketEvent.kt
index 4263d9d..0b41373 100644
--- a/src/main/kotlin/moe/nea/firmament/events/OutgoingPacketEvent.kt
+++ b/src/main/kotlin/moe/nea/firmament/events/OutgoingPacketEvent.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.events
 
 import net.minecraft.network.packet.Packet
diff --git a/src/main/kotlin/moe/nea/firmament/events/ParticleSpawnEvent.kt b/src/main/kotlin/moe/nea/firmament/events/ParticleSpawnEvent.kt
index d33571e..5092fe2 100644
--- a/src/main/kotlin/moe/nea/firmament/events/ParticleSpawnEvent.kt
+++ b/src/main/kotlin/moe/nea/firmament/events/ParticleSpawnEvent.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.events
diff --git a/src/main/kotlin/moe/nea/firmament/events/ScreenClickEvent.kt b/src/main/kotlin/moe/nea/firmament/events/ScreenClickEvent.kt
index cd25991..0977971 100644
--- a/src/main/kotlin/moe/nea/firmament/events/ScreenClickEvent.kt
+++ b/src/main/kotlin/moe/nea/firmament/events/ScreenClickEvent.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.events
 
 import net.minecraft.client.gui.screen.ingame.HandledScreen
diff --git a/src/main/kotlin/moe/nea/firmament/events/ScreenOpenEvent.kt b/src/main/kotlin/moe/nea/firmament/events/ScreenOpenEvent.kt
index 780e3c7..034fe13 100644
--- a/src/main/kotlin/moe/nea/firmament/events/ScreenOpenEvent.kt
+++ b/src/main/kotlin/moe/nea/firmament/events/ScreenOpenEvent.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.events
diff --git a/src/main/kotlin/moe/nea/firmament/events/ScreenRenderPostEvent.kt b/src/main/kotlin/moe/nea/firmament/events/ScreenRenderPostEvent.kt
index 2d061a2..e62c119 100644
--- a/src/main/kotlin/moe/nea/firmament/events/ScreenRenderPostEvent.kt
+++ b/src/main/kotlin/moe/nea/firmament/events/ScreenRenderPostEvent.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.events
 
 import net.minecraft.client.gui.DrawContext
diff --git a/src/main/kotlin/moe/nea/firmament/events/ServerChatLineReceivedEvent.kt b/src/main/kotlin/moe/nea/firmament/events/ServerChatLineReceivedEvent.kt
index 57879a1..b8b262d 100644
--- a/src/main/kotlin/moe/nea/firmament/events/ServerChatLineReceivedEvent.kt
+++ b/src/main/kotlin/moe/nea/firmament/events/ServerChatLineReceivedEvent.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.events
diff --git a/src/main/kotlin/moe/nea/firmament/events/SkyblockServerUpdateEvent.kt b/src/main/kotlin/moe/nea/firmament/events/SkyblockServerUpdateEvent.kt
index 36d456c..b103ea7 100644
--- a/src/main/kotlin/moe/nea/firmament/events/SkyblockServerUpdateEvent.kt
+++ b/src/main/kotlin/moe/nea/firmament/events/SkyblockServerUpdateEvent.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.events
diff --git a/src/main/kotlin/moe/nea/firmament/events/SlotRenderEvents.kt b/src/main/kotlin/moe/nea/firmament/events/SlotRenderEvents.kt
index c4b0a3d..8ab51a8 100644
--- a/src/main/kotlin/moe/nea/firmament/events/SlotRenderEvents.kt
+++ b/src/main/kotlin/moe/nea/firmament/events/SlotRenderEvents.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.events
diff --git a/src/main/kotlin/moe/nea/firmament/events/TickEvent.kt b/src/main/kotlin/moe/nea/firmament/events/TickEvent.kt
index 5d9b0ce..692f25c 100644
--- a/src/main/kotlin/moe/nea/firmament/events/TickEvent.kt
+++ b/src/main/kotlin/moe/nea/firmament/events/TickEvent.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.events
 
 data class TickEvent(val tickCount: Int) : FirmamentEvent() {
diff --git a/src/main/kotlin/moe/nea/firmament/events/TooltipEvent.kt b/src/main/kotlin/moe/nea/firmament/events/TooltipEvent.kt
index 3341534..5b82feb 100644
--- a/src/main/kotlin/moe/nea/firmament/events/TooltipEvent.kt
+++ b/src/main/kotlin/moe/nea/firmament/events/TooltipEvent.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.events
 
 import net.minecraft.client.gui.tooltip.Tooltip
diff --git a/src/main/kotlin/moe/nea/firmament/events/WorldKeyboardEvent.kt b/src/main/kotlin/moe/nea/firmament/events/WorldKeyboardEvent.kt
index 497d38f..cc13d1e 100644
--- a/src/main/kotlin/moe/nea/firmament/events/WorldKeyboardEvent.kt
+++ b/src/main/kotlin/moe/nea/firmament/events/WorldKeyboardEvent.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.events
 
 import net.minecraft.client.option.KeyBinding
diff --git a/src/main/kotlin/moe/nea/firmament/events/WorldReadyEvent.kt b/src/main/kotlin/moe/nea/firmament/events/WorldReadyEvent.kt
index aa6049b..d0f29a5 100644
--- a/src/main/kotlin/moe/nea/firmament/events/WorldReadyEvent.kt
+++ b/src/main/kotlin/moe/nea/firmament/events/WorldReadyEvent.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.events
diff --git a/src/main/kotlin/moe/nea/firmament/events/WorldRenderLastEvent.kt b/src/main/kotlin/moe/nea/firmament/events/WorldRenderLastEvent.kt
index c5da84f..025d165 100644
--- a/src/main/kotlin/moe/nea/firmament/events/WorldRenderLastEvent.kt
+++ b/src/main/kotlin/moe/nea/firmament/events/WorldRenderLastEvent.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.events
diff --git a/src/main/kotlin/moe/nea/firmament/features/FeatureManager.kt b/src/main/kotlin/moe/nea/firmament/features/FeatureManager.kt
index 2182834..0c8acb9 100644
--- a/src/main/kotlin/moe/nea/firmament/features/FeatureManager.kt
+++ b/src/main/kotlin/moe/nea/firmament/features/FeatureManager.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.features
diff --git a/src/main/kotlin/moe/nea/firmament/features/FirmamentFeature.kt b/src/main/kotlin/moe/nea/firmament/features/FirmamentFeature.kt
index 94b69f1..afd36a5 100644
--- a/src/main/kotlin/moe/nea/firmament/features/FirmamentFeature.kt
+++ b/src/main/kotlin/moe/nea/firmament/features/FirmamentFeature.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.features
diff --git a/src/main/kotlin/moe/nea/firmament/features/chat/ChatLinks.kt b/src/main/kotlin/moe/nea/firmament/features/chat/ChatLinks.kt
index 41b2e96..7d563fa 100644
--- a/src/main/kotlin/moe/nea/firmament/features/chat/ChatLinks.kt
+++ b/src/main/kotlin/moe/nea/firmament/features/chat/ChatLinks.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.features.chat
 
 import io.ktor.client.request.*
diff --git a/src/main/kotlin/moe/nea/firmament/features/debug/DebugView.kt b/src/main/kotlin/moe/nea/firmament/features/debug/DebugView.kt
index 96ea7aa..799a9b8 100644
--- a/src/main/kotlin/moe/nea/firmament/features/debug/DebugView.kt
+++ b/src/main/kotlin/moe/nea/firmament/features/debug/DebugView.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.features.debug
 
 import io.github.cottonmc.cotton.gui.client.CottonHud
diff --git a/src/main/kotlin/moe/nea/firmament/features/debug/DeveloperFeatures.kt b/src/main/kotlin/moe/nea/firmament/features/debug/DeveloperFeatures.kt
index ffa0fd2..20d1358 100644
--- a/src/main/kotlin/moe/nea/firmament/features/debug/DeveloperFeatures.kt
+++ b/src/main/kotlin/moe/nea/firmament/features/debug/DeveloperFeatures.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.features.debug
 
 import java.nio.file.Path
diff --git a/src/main/kotlin/moe/nea/firmament/features/debug/ObjectRenderer.kt b/src/main/kotlin/moe/nea/firmament/features/debug/ObjectRenderer.kt
index f5185cd..18f502c 100644
--- a/src/main/kotlin/moe/nea/firmament/features/debug/ObjectRenderer.kt
+++ b/src/main/kotlin/moe/nea/firmament/features/debug/ObjectRenderer.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.features.debug
 
 import io.github.cottonmc.cotton.gui.widget.WBox
diff --git a/src/main/kotlin/moe/nea/firmament/features/fishing/FishingWarning.kt b/src/main/kotlin/moe/nea/firmament/features/fishing/FishingWarning.kt
index e133d97..77b222a 100644
--- a/src/main/kotlin/moe/nea/firmament/features/fishing/FishingWarning.kt
+++ b/src/main/kotlin/moe/nea/firmament/features/fishing/FishingWarning.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.features.fishing
diff --git a/src/main/kotlin/moe/nea/firmament/features/fixes/Fixes.kt b/src/main/kotlin/moe/nea/firmament/features/fixes/Fixes.kt
index f09111c..77397bc 100644
--- a/src/main/kotlin/moe/nea/firmament/features/fixes/Fixes.kt
+++ b/src/main/kotlin/moe/nea/firmament/features/fixes/Fixes.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.features.fixes
 
 import moe.nea.firmament.features.FirmamentFeature
diff --git a/src/main/kotlin/moe/nea/firmament/features/inventory/CraftingOverlay.kt b/src/main/kotlin/moe/nea/firmament/features/inventory/CraftingOverlay.kt
index bb73513..8de88aa 100644
--- a/src/main/kotlin/moe/nea/firmament/features/inventory/CraftingOverlay.kt
+++ b/src/main/kotlin/moe/nea/firmament/features/inventory/CraftingOverlay.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.features.inventory
 
 import net.minecraft.client.gui.screen.ingame.GenericContainerScreen
diff --git a/src/main/kotlin/moe/nea/firmament/features/inventory/SaveCursorPosition.kt b/src/main/kotlin/moe/nea/firmament/features/inventory/SaveCursorPosition.kt
index 577f19b..3030d6a 100644
--- a/src/main/kotlin/moe/nea/firmament/features/inventory/SaveCursorPosition.kt
+++ b/src/main/kotlin/moe/nea/firmament/features/inventory/SaveCursorPosition.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.features.inventory
 
 import kotlin.math.absoluteValue
diff --git a/src/main/kotlin/moe/nea/firmament/features/inventory/SlotLocking.kt b/src/main/kotlin/moe/nea/firmament/features/inventory/SlotLocking.kt
index a601489..f6a197c 100644
--- a/src/main/kotlin/moe/nea/firmament/features/inventory/SlotLocking.kt
+++ b/src/main/kotlin/moe/nea/firmament/features/inventory/SlotLocking.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.features.inventory
diff --git a/src/main/kotlin/moe/nea/firmament/features/inventory/storageoverlay/StorageBackingHandle.kt b/src/main/kotlin/moe/nea/firmament/features/inventory/storageoverlay/StorageBackingHandle.kt
index 5802cb7..006ad54 100644
--- a/src/main/kotlin/moe/nea/firmament/features/inventory/storageoverlay/StorageBackingHandle.kt
+++ b/src/main/kotlin/moe/nea/firmament/features/inventory/storageoverlay/StorageBackingHandle.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.features.inventory.storageoverlay
 
 import net.minecraft.client.gui.screen.Screen
diff --git a/src/main/kotlin/moe/nea/firmament/features/inventory/storageoverlay/StorageData.kt b/src/main/kotlin/moe/nea/firmament/features/inventory/storageoverlay/StorageData.kt
index 00714ab..a8542de 100644
--- a/src/main/kotlin/moe/nea/firmament/features/inventory/storageoverlay/StorageData.kt
+++ b/src/main/kotlin/moe/nea/firmament/features/inventory/storageoverlay/StorageData.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 @file:UseSerializers(SortedMapSerializer::class)
 package moe.nea.firmament.features.inventory.storageoverlay
 
diff --git a/src/main/kotlin/moe/nea/firmament/features/inventory/storageoverlay/StorageOverlay.kt b/src/main/kotlin/moe/nea/firmament/features/inventory/storageoverlay/StorageOverlay.kt
index ad1ca53..7d1c72e 100644
--- a/src/main/kotlin/moe/nea/firmament/features/inventory/storageoverlay/StorageOverlay.kt
+++ b/src/main/kotlin/moe/nea/firmament/features/inventory/storageoverlay/StorageOverlay.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.features.inventory.storageoverlay
 
 import java.util.*
diff --git a/src/main/kotlin/moe/nea/firmament/features/inventory/storageoverlay/StorageOverlayScreen.kt b/src/main/kotlin/moe/nea/firmament/features/inventory/storageoverlay/StorageOverlayScreen.kt
index 1c896db..63ce134 100644
--- a/src/main/kotlin/moe/nea/firmament/features/inventory/storageoverlay/StorageOverlayScreen.kt
+++ b/src/main/kotlin/moe/nea/firmament/features/inventory/storageoverlay/StorageOverlayScreen.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.features.inventory.storageoverlay
 
 import moe.nea.firmament.util.MC
diff --git a/src/main/kotlin/moe/nea/firmament/features/inventory/storageoverlay/StoragePageSlot.kt b/src/main/kotlin/moe/nea/firmament/features/inventory/storageoverlay/StoragePageSlot.kt
index 19afeef..b71e745 100644
--- a/src/main/kotlin/moe/nea/firmament/features/inventory/storageoverlay/StoragePageSlot.kt
+++ b/src/main/kotlin/moe/nea/firmament/features/inventory/storageoverlay/StoragePageSlot.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.features.inventory.storageoverlay
 
 import kotlinx.serialization.KSerializer
diff --git a/src/main/kotlin/moe/nea/firmament/features/inventory/storageoverlay/VirtualInventory.kt b/src/main/kotlin/moe/nea/firmament/features/inventory/storageoverlay/VirtualInventory.kt
index 28280f9..3c7bedd 100644
--- a/src/main/kotlin/moe/nea/firmament/features/inventory/storageoverlay/VirtualInventory.kt
+++ b/src/main/kotlin/moe/nea/firmament/features/inventory/storageoverlay/VirtualInventory.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.features.inventory.storageoverlay
 
 import io.ktor.util.decodeBase64Bytes
diff --git a/src/main/kotlin/moe/nea/firmament/features/texturepack/CustomSkyBlockTextures.kt b/src/main/kotlin/moe/nea/firmament/features/texturepack/CustomSkyBlockTextures.kt
index b73c591..b086811 100644
--- a/src/main/kotlin/moe/nea/firmament/features/texturepack/CustomSkyBlockTextures.kt
+++ b/src/main/kotlin/moe/nea/firmament/features/texturepack/CustomSkyBlockTextures.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.features.texturepack
 
 import net.minecraft.client.util.ModelIdentifier
diff --git a/src/main/kotlin/moe/nea/firmament/features/world/FairySouls.kt b/src/main/kotlin/moe/nea/firmament/features/world/FairySouls.kt
index 91821f6..c1ccfc4 100644
--- a/src/main/kotlin/moe/nea/firmament/features/world/FairySouls.kt
+++ b/src/main/kotlin/moe/nea/firmament/features/world/FairySouls.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.features.world
diff --git a/src/main/kotlin/moe/nea/firmament/gui/WBar.kt b/src/main/kotlin/moe/nea/firmament/gui/WBar.kt
index ed812ec..85972e4 100644
--- a/src/main/kotlin/moe/nea/firmament/gui/WBar.kt
+++ b/src/main/kotlin/moe/nea/firmament/gui/WBar.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.gui
 
 import com.mojang.blaze3d.systems.RenderSystem
diff --git a/src/main/kotlin/moe/nea/firmament/gui/WCenteringPanel.kt b/src/main/kotlin/moe/nea/firmament/gui/WCenteringPanel.kt
index c6d1f56..69a59f5 100644
--- a/src/main/kotlin/moe/nea/firmament/gui/WCenteringPanel.kt
+++ b/src/main/kotlin/moe/nea/firmament/gui/WCenteringPanel.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.gui
 
 import io.github.cottonmc.cotton.gui.widget.WPanel
diff --git a/src/main/kotlin/moe/nea/firmament/gui/WFixedPanel.kt b/src/main/kotlin/moe/nea/firmament/gui/WFixedPanel.kt
index 0c5eb05..0fd724b 100644
--- a/src/main/kotlin/moe/nea/firmament/gui/WFixedPanel.kt
+++ b/src/main/kotlin/moe/nea/firmament/gui/WFixedPanel.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.gui
 
 import io.github.cottonmc.cotton.gui.widget.WPanel
diff --git a/src/main/kotlin/moe/nea/firmament/gui/WSpacer.kt b/src/main/kotlin/moe/nea/firmament/gui/WSpacer.kt
index 42d08fe..8cdc4b8 100644
--- a/src/main/kotlin/moe/nea/firmament/gui/WSpacer.kt
+++ b/src/main/kotlin/moe/nea/firmament/gui/WSpacer.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.gui
 
 import io.github.cottonmc.cotton.gui.widget.WPanel
diff --git a/src/main/kotlin/moe/nea/firmament/gui/WSplitPanel.kt b/src/main/kotlin/moe/nea/firmament/gui/WSplitPanel.kt
index 0d13e42..1469880 100644
--- a/src/main/kotlin/moe/nea/firmament/gui/WSplitPanel.kt
+++ b/src/main/kotlin/moe/nea/firmament/gui/WSplitPanel.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.gui
 
 import io.github.cottonmc.cotton.gui.widget.WPanel
diff --git a/src/main/kotlin/moe/nea/firmament/gui/WTightScrollPanel.kt b/src/main/kotlin/moe/nea/firmament/gui/WTightScrollPanel.kt
index e9905d8..e4c3989 100644
--- a/src/main/kotlin/moe/nea/firmament/gui/WTightScrollPanel.kt
+++ b/src/main/kotlin/moe/nea/firmament/gui/WTightScrollPanel.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.gui
 
 import io.github.cottonmc.cotton.gui.widget.WPanel
diff --git a/src/main/kotlin/moe/nea/firmament/gui/WTitledItem.kt b/src/main/kotlin/moe/nea/firmament/gui/WTitledItem.kt
index 07850fc..4c81648 100644
--- a/src/main/kotlin/moe/nea/firmament/gui/WTitledItem.kt
+++ b/src/main/kotlin/moe/nea/firmament/gui/WTitledItem.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.gui
 
 import com.mojang.blaze3d.systems.RenderSystem
diff --git a/src/main/kotlin/moe/nea/firmament/gui/config/AllConfigsGui.kt b/src/main/kotlin/moe/nea/firmament/gui/config/AllConfigsGui.kt
index 449835e..b926946 100644
--- a/src/main/kotlin/moe/nea/firmament/gui/config/AllConfigsGui.kt
+++ b/src/main/kotlin/moe/nea/firmament/gui/config/AllConfigsGui.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.gui.config
diff --git a/src/main/kotlin/moe/nea/firmament/gui/config/BooleanHandler.kt b/src/main/kotlin/moe/nea/firmament/gui/config/BooleanHandler.kt
index df30f6d..9305bad 100644
--- a/src/main/kotlin/moe/nea/firmament/gui/config/BooleanHandler.kt
+++ b/src/main/kotlin/moe/nea/firmament/gui/config/BooleanHandler.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.gui.config
diff --git a/src/main/kotlin/moe/nea/firmament/gui/config/ClickHandler.kt b/src/main/kotlin/moe/nea/firmament/gui/config/ClickHandler.kt
index 2b2032c..33cc704 100644
--- a/src/main/kotlin/moe/nea/firmament/gui/config/ClickHandler.kt
+++ b/src/main/kotlin/moe/nea/firmament/gui/config/ClickHandler.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.gui.config
diff --git a/src/main/kotlin/moe/nea/firmament/gui/config/DurationHandler.kt b/src/main/kotlin/moe/nea/firmament/gui/config/DurationHandler.kt
index e5d2621..c8de252 100644
--- a/src/main/kotlin/moe/nea/firmament/gui/config/DurationHandler.kt
+++ b/src/main/kotlin/moe/nea/firmament/gui/config/DurationHandler.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.gui.config
 
 import io.github.cottonmc.cotton.gui.widget.WBox
diff --git a/src/main/kotlin/moe/nea/firmament/gui/config/GuiAppender.kt b/src/main/kotlin/moe/nea/firmament/gui/config/GuiAppender.kt
index ddb37d6..22a525b 100644
--- a/src/main/kotlin/moe/nea/firmament/gui/config/GuiAppender.kt
+++ b/src/main/kotlin/moe/nea/firmament/gui/config/GuiAppender.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.gui.config
diff --git a/src/main/kotlin/moe/nea/firmament/gui/config/HudMetaHandler.kt b/src/main/kotlin/moe/nea/firmament/gui/config/HudMetaHandler.kt
index f8d2c3e..1e5ced8 100644
--- a/src/main/kotlin/moe/nea/firmament/gui/config/HudMetaHandler.kt
+++ b/src/main/kotlin/moe/nea/firmament/gui/config/HudMetaHandler.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.gui.config
 
 import io.github.cottonmc.cotton.gui.widget.WButton
diff --git a/src/main/kotlin/moe/nea/firmament/gui/config/IntegerHandler.kt b/src/main/kotlin/moe/nea/firmament/gui/config/IntegerHandler.kt
index c7a9a55..b8f0e2b 100644
--- a/src/main/kotlin/moe/nea/firmament/gui/config/IntegerHandler.kt
+++ b/src/main/kotlin/moe/nea/firmament/gui/config/IntegerHandler.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.gui.config
 
 import io.github.cottonmc.cotton.gui.widget.WBox
diff --git a/src/main/kotlin/moe/nea/firmament/gui/config/JAnyHud.kt b/src/main/kotlin/moe/nea/firmament/gui/config/JAnyHud.kt
index 5470f9b..f3f83b3 100644
--- a/src/main/kotlin/moe/nea/firmament/gui/config/JAnyHud.kt
+++ b/src/main/kotlin/moe/nea/firmament/gui/config/JAnyHud.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.gui.config
 
 import moe.nea.jarvis.api.JarvisHud
diff --git a/src/main/kotlin/moe/nea/firmament/gui/config/ManagedConfig.kt b/src/main/kotlin/moe/nea/firmament/gui/config/ManagedConfig.kt
index 4d1f1ae..b38c8a7 100644
--- a/src/main/kotlin/moe/nea/firmament/gui/config/ManagedConfig.kt
+++ b/src/main/kotlin/moe/nea/firmament/gui/config/ManagedConfig.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.gui.config
diff --git a/src/main/kotlin/moe/nea/firmament/gui/config/StringHandler.kt b/src/main/kotlin/moe/nea/firmament/gui/config/StringHandler.kt
index a9c7ebf..d15b272 100644
--- a/src/main/kotlin/moe/nea/firmament/gui/config/StringHandler.kt
+++ b/src/main/kotlin/moe/nea/firmament/gui/config/StringHandler.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.gui.config
diff --git a/src/main/kotlin/moe/nea/firmament/gui/profileviewer/PetsPage.kt b/src/main/kotlin/moe/nea/firmament/gui/profileviewer/PetsPage.kt
index 9909418..82d2fef 100644
--- a/src/main/kotlin/moe/nea/firmament/gui/profileviewer/PetsPage.kt
+++ b/src/main/kotlin/moe/nea/firmament/gui/profileviewer/PetsPage.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.gui.profileviewer
 
 import io.github.cottonmc.cotton.gui.client.BackgroundPainter
diff --git a/src/main/kotlin/moe/nea/firmament/gui/profileviewer/ProfilePage.kt b/src/main/kotlin/moe/nea/firmament/gui/profileviewer/ProfilePage.kt
index 5f8d0a3..3d599ee 100644
--- a/src/main/kotlin/moe/nea/firmament/gui/profileviewer/ProfilePage.kt
+++ b/src/main/kotlin/moe/nea/firmament/gui/profileviewer/ProfilePage.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.gui.profileviewer
 
 import io.github.cottonmc.cotton.gui.widget.WWidget
diff --git a/src/main/kotlin/moe/nea/firmament/gui/profileviewer/ProfileViewer.kt b/src/main/kotlin/moe/nea/firmament/gui/profileviewer/ProfileViewer.kt
index 8093df3..bebcbcc 100644
--- a/src/main/kotlin/moe/nea/firmament/gui/profileviewer/ProfileViewer.kt
+++ b/src/main/kotlin/moe/nea/firmament/gui/profileviewer/ProfileViewer.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.gui.profileviewer
 
 import io.github.cottonmc.cotton.gui.client.CottonClientScreen
diff --git a/src/main/kotlin/moe/nea/firmament/gui/profileviewer/SkillPage.kt b/src/main/kotlin/moe/nea/firmament/gui/profileviewer/SkillPage.kt
index 239c743..72316f7 100644
--- a/src/main/kotlin/moe/nea/firmament/gui/profileviewer/SkillPage.kt
+++ b/src/main/kotlin/moe/nea/firmament/gui/profileviewer/SkillPage.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.gui.profileviewer
 
 import io.github.cottonmc.cotton.gui.widget.TooltipBuilder
diff --git a/src/main/kotlin/moe/nea/firmament/hud/RepoDownloadProgress.kt b/src/main/kotlin/moe/nea/firmament/hud/RepoDownloadProgress.kt
index 827835a..b4bc819 100644
--- a/src/main/kotlin/moe/nea/firmament/hud/RepoDownloadProgress.kt
+++ b/src/main/kotlin/moe/nea/firmament/hud/RepoDownloadProgress.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.hud
diff --git a/src/main/kotlin/moe/nea/firmament/jarvis/JarvisIntegration.kt b/src/main/kotlin/moe/nea/firmament/jarvis/JarvisIntegration.kt
index f691dba..9c27030 100644
--- a/src/main/kotlin/moe/nea/firmament/jarvis/JarvisIntegration.kt
+++ b/src/main/kotlin/moe/nea/firmament/jarvis/JarvisIntegration.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.jarvis
 
 import moe.nea.jarvis.api.Jarvis
diff --git a/src/main/kotlin/moe/nea/firmament/keybindings/FirmamentKeyBindings.kt b/src/main/kotlin/moe/nea/firmament/keybindings/FirmamentKeyBindings.kt
index 1dafb3e..a7f25c0 100644
--- a/src/main/kotlin/moe/nea/firmament/keybindings/FirmamentKeyBindings.kt
+++ b/src/main/kotlin/moe/nea/firmament/keybindings/FirmamentKeyBindings.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.keybindings
diff --git a/src/main/kotlin/moe/nea/firmament/keybindings/IKeyBinding.kt b/src/main/kotlin/moe/nea/firmament/keybindings/IKeyBinding.kt
index 7cb2720..b5e1d6b 100644
--- a/src/main/kotlin/moe/nea/firmament/keybindings/IKeyBinding.kt
+++ b/src/main/kotlin/moe/nea/firmament/keybindings/IKeyBinding.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.keybindings
 
 import net.minecraft.client.option.KeyBinding
diff --git a/src/main/kotlin/moe/nea/firmament/modmenu/FirmamentModMenuPlugin.kt b/src/main/kotlin/moe/nea/firmament/modmenu/FirmamentModMenuPlugin.kt
index 44e491e..11fc8c1 100644
--- a/src/main/kotlin/moe/nea/firmament/modmenu/FirmamentModMenuPlugin.kt
+++ b/src/main/kotlin/moe/nea/firmament/modmenu/FirmamentModMenuPlugin.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.modmenu
 
 import com.terraformersmc.modmenu.api.ConfigScreenFactory
diff --git a/src/main/kotlin/moe/nea/firmament/recipes/SBCraftingRecipe.kt b/src/main/kotlin/moe/nea/firmament/recipes/SBCraftingRecipe.kt
index a428780..5898174 100644
--- a/src/main/kotlin/moe/nea/firmament/recipes/SBCraftingRecipe.kt
+++ b/src/main/kotlin/moe/nea/firmament/recipes/SBCraftingRecipe.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.recipes
diff --git a/src/main/kotlin/moe/nea/firmament/recipes/SBForgeRecipe.kt b/src/main/kotlin/moe/nea/firmament/recipes/SBForgeRecipe.kt
index d70ebcd..604ef12 100644
--- a/src/main/kotlin/moe/nea/firmament/recipes/SBForgeRecipe.kt
+++ b/src/main/kotlin/moe/nea/firmament/recipes/SBForgeRecipe.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.recipes
diff --git a/src/main/kotlin/moe/nea/firmament/recipes/SBRecipe.kt b/src/main/kotlin/moe/nea/firmament/recipes/SBRecipe.kt
index 670488a..7527783 100644
--- a/src/main/kotlin/moe/nea/firmament/recipes/SBRecipe.kt
+++ b/src/main/kotlin/moe/nea/firmament/recipes/SBRecipe.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.recipes
diff --git a/src/main/kotlin/moe/nea/firmament/rei/FirmamentReiPlugin.kt b/src/main/kotlin/moe/nea/firmament/rei/FirmamentReiPlugin.kt
index 223ee7d..7f7110f 100644
--- a/src/main/kotlin/moe/nea/firmament/rei/FirmamentReiPlugin.kt
+++ b/src/main/kotlin/moe/nea/firmament/rei/FirmamentReiPlugin.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.rei
diff --git a/src/main/kotlin/moe/nea/firmament/rei/NEUItemEntryRenderer.kt b/src/main/kotlin/moe/nea/firmament/rei/NEUItemEntryRenderer.kt
index 7d12788..a123fa8 100644
--- a/src/main/kotlin/moe/nea/firmament/rei/NEUItemEntryRenderer.kt
+++ b/src/main/kotlin/moe/nea/firmament/rei/NEUItemEntryRenderer.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.rei
diff --git a/src/main/kotlin/moe/nea/firmament/rei/NEUItemEntrySerializer.kt b/src/main/kotlin/moe/nea/firmament/rei/NEUItemEntrySerializer.kt
index 7d98558..b164084 100644
--- a/src/main/kotlin/moe/nea/firmament/rei/NEUItemEntrySerializer.kt
+++ b/src/main/kotlin/moe/nea/firmament/rei/NEUItemEntrySerializer.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.rei
diff --git a/src/main/kotlin/moe/nea/firmament/rei/SBItemEntryDefinition.kt b/src/main/kotlin/moe/nea/firmament/rei/SBItemEntryDefinition.kt
index eac7d01..8150f4c 100644
--- a/src/main/kotlin/moe/nea/firmament/rei/SBItemEntryDefinition.kt
+++ b/src/main/kotlin/moe/nea/firmament/rei/SBItemEntryDefinition.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.rei
diff --git a/src/main/kotlin/moe/nea/firmament/rei/SkyblockCraftingRecipeDynamicGenerator.kt b/src/main/kotlin/moe/nea/firmament/rei/SkyblockCraftingRecipeDynamicGenerator.kt
index c1039d7..c6b20c1 100644
--- a/src/main/kotlin/moe/nea/firmament/rei/SkyblockCraftingRecipeDynamicGenerator.kt
+++ b/src/main/kotlin/moe/nea/firmament/rei/SkyblockCraftingRecipeDynamicGenerator.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.rei
diff --git a/src/main/kotlin/moe/nea/firmament/rei/SkyblockItemIdFocusedStackProvider.kt b/src/main/kotlin/moe/nea/firmament/rei/SkyblockItemIdFocusedStackProvider.kt
index 9ee3726..a26ec53 100644
--- a/src/main/kotlin/moe/nea/firmament/rei/SkyblockItemIdFocusedStackProvider.kt
+++ b/src/main/kotlin/moe/nea/firmament/rei/SkyblockItemIdFocusedStackProvider.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.rei
diff --git a/src/main/kotlin/moe/nea/firmament/rei/math.kt b/src/main/kotlin/moe/nea/firmament/rei/math.kt
index e3504a1..d531473 100644
--- a/src/main/kotlin/moe/nea/firmament/rei/math.kt
+++ b/src/main/kotlin/moe/nea/firmament/rei/math.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.rei
 
 import me.shedaniel.math.Point
diff --git a/src/main/kotlin/moe/nea/firmament/repo/ExpLadder.kt b/src/main/kotlin/moe/nea/firmament/repo/ExpLadder.kt
index 082483b..7ea4e63 100644
--- a/src/main/kotlin/moe/nea/firmament/repo/ExpLadder.kt
+++ b/src/main/kotlin/moe/nea/firmament/repo/ExpLadder.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.repo
 
 import com.google.common.cache.CacheBuilder
diff --git a/src/main/kotlin/moe/nea/firmament/repo/HypixelStaticData.kt b/src/main/kotlin/moe/nea/firmament/repo/HypixelStaticData.kt
index a5860ae..2ef8b5f 100644
--- a/src/main/kotlin/moe/nea/firmament/repo/HypixelStaticData.kt
+++ b/src/main/kotlin/moe/nea/firmament/repo/HypixelStaticData.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.repo
 
 import io.ktor.client.call.body
diff --git a/src/main/kotlin/moe/nea/firmament/repo/ItemCache.kt b/src/main/kotlin/moe/nea/firmament/repo/ItemCache.kt
index 5dc1b25..c027a5d 100644
--- a/src/main/kotlin/moe/nea/firmament/repo/ItemCache.kt
+++ b/src/main/kotlin/moe/nea/firmament/repo/ItemCache.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.repo
diff --git a/src/main/kotlin/moe/nea/firmament/repo/RepoDownloadManager.kt b/src/main/kotlin/moe/nea/firmament/repo/RepoDownloadManager.kt
index 4bff62b..18f8e49 100644
--- a/src/main/kotlin/moe/nea/firmament/repo/RepoDownloadManager.kt
+++ b/src/main/kotlin/moe/nea/firmament/repo/RepoDownloadManager.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.repo
diff --git a/src/main/kotlin/moe/nea/firmament/repo/RepoManager.kt b/src/main/kotlin/moe/nea/firmament/repo/RepoManager.kt
index 0574907..3059108 100644
--- a/src/main/kotlin/moe/nea/firmament/repo/RepoManager.kt
+++ b/src/main/kotlin/moe/nea/firmament/repo/RepoManager.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.repo
diff --git a/src/main/kotlin/moe/nea/firmament/util/CommonSoundEffects.kt b/src/main/kotlin/moe/nea/firmament/util/CommonSoundEffects.kt
index f2f70a0..10e9249 100644
--- a/src/main/kotlin/moe/nea/firmament/util/CommonSoundEffects.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/CommonSoundEffects.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.util
diff --git a/src/main/kotlin/moe/nea/firmament/util/FirmFormatters.kt b/src/main/kotlin/moe/nea/firmament/util/FirmFormatters.kt
index a3e93ae..b2c1f35 100644
--- a/src/main/kotlin/moe/nea/firmament/util/FirmFormatters.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/FirmFormatters.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.util
 
 import com.google.common.math.IntMath.pow
diff --git a/src/main/kotlin/moe/nea/firmament/util/ItemUtil.kt b/src/main/kotlin/moe/nea/firmament/util/ItemUtil.kt
index 78627cd..cccff64 100644
--- a/src/main/kotlin/moe/nea/firmament/util/ItemUtil.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/ItemUtil.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.util
diff --git a/src/main/kotlin/moe/nea/firmament/util/LegacyFormattingCode.kt b/src/main/kotlin/moe/nea/firmament/util/LegacyFormattingCode.kt
index f93c274..1dcd08e 100644
--- a/src/main/kotlin/moe/nea/firmament/util/LegacyFormattingCode.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/LegacyFormattingCode.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.util
 
 import net.minecraft.util.Formatting
diff --git a/src/main/kotlin/moe/nea/firmament/util/LegacyTagParser.kt b/src/main/kotlin/moe/nea/firmament/util/LegacyTagParser.kt
index 677a0f1..80e1ea4 100644
--- a/src/main/kotlin/moe/nea/firmament/util/LegacyTagParser.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/LegacyTagParser.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.util
diff --git a/src/main/kotlin/moe/nea/firmament/util/Locraw.kt b/src/main/kotlin/moe/nea/firmament/util/Locraw.kt
index b7a29b2..f32bc5e 100644
--- a/src/main/kotlin/moe/nea/firmament/util/Locraw.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/Locraw.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.util
diff --git a/src/main/kotlin/moe/nea/firmament/util/MC.kt b/src/main/kotlin/moe/nea/firmament/util/MC.kt
index e6e53fa..602d85a 100644
--- a/src/main/kotlin/moe/nea/firmament/util/MC.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/MC.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.util
diff --git a/src/main/kotlin/moe/nea/firmament/util/MinecraftDispatcher.kt b/src/main/kotlin/moe/nea/firmament/util/MinecraftDispatcher.kt
index a7346b4..29ca6c2 100644
--- a/src/main/kotlin/moe/nea/firmament/util/MinecraftDispatcher.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/MinecraftDispatcher.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.util
diff --git a/src/main/kotlin/moe/nea/firmament/util/SBData.kt b/src/main/kotlin/moe/nea/firmament/util/SBData.kt
index 1d97dfa..22ddd3d 100644
--- a/src/main/kotlin/moe/nea/firmament/util/SBData.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/SBData.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.util
diff --git a/src/main/kotlin/moe/nea/firmament/util/ScoreboardUtil.kt b/src/main/kotlin/moe/nea/firmament/util/ScoreboardUtil.kt
index d1bd057..afbdd82 100644
--- a/src/main/kotlin/moe/nea/firmament/util/ScoreboardUtil.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/ScoreboardUtil.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.util
 
 import java.util.Optional
diff --git a/src/main/kotlin/moe/nea/firmament/util/ScreenUtil.kt b/src/main/kotlin/moe/nea/firmament/util/ScreenUtil.kt
index 92a8cef..39d4541 100644
--- a/src/main/kotlin/moe/nea/firmament/util/ScreenUtil.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/ScreenUtil.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.util
diff --git a/src/main/kotlin/moe/nea/firmament/util/SequenceUtil.kt b/src/main/kotlin/moe/nea/firmament/util/SequenceUtil.kt
index 7d39fdc..2cb271d 100644
--- a/src/main/kotlin/moe/nea/firmament/util/SequenceUtil.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/SequenceUtil.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.util
diff --git a/src/main/kotlin/moe/nea/firmament/util/SkyblockId.kt b/src/main/kotlin/moe/nea/firmament/util/SkyblockId.kt
index 9923d7a..51c8c22 100644
--- a/src/main/kotlin/moe/nea/firmament/util/SkyblockId.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/SkyblockId.kt
@@ -1,20 +1,9 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
+
 @file:UseSerializers(DashlessUUIDSerializer::class)
 package moe.nea.firmament.util
 
diff --git a/src/main/kotlin/moe/nea/firmament/util/SortedMapSerializer.kt b/src/main/kotlin/moe/nea/firmament/util/SortedMapSerializer.kt
index 6f4ff2e..c7cbc3b 100644
--- a/src/main/kotlin/moe/nea/firmament/util/SortedMapSerializer.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/SortedMapSerializer.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.util
 
 import java.util.SortedMap
diff --git a/src/main/kotlin/moe/nea/firmament/util/TimeMark.kt b/src/main/kotlin/moe/nea/firmament/util/TimeMark.kt
index 3331a76..f3526be 100644
--- a/src/main/kotlin/moe/nea/firmament/util/TimeMark.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/TimeMark.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.util
diff --git a/src/main/kotlin/moe/nea/firmament/util/Timer.kt b/src/main/kotlin/moe/nea/firmament/util/Timer.kt
index 0322e7c..ad6e9f7 100644
--- a/src/main/kotlin/moe/nea/firmament/util/Timer.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/Timer.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.util
diff --git a/src/main/kotlin/moe/nea/firmament/util/assertions.kt b/src/main/kotlin/moe/nea/firmament/util/assertions.kt
index 0fe569a..2e2e01a 100644
--- a/src/main/kotlin/moe/nea/firmament/util/assertions.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/assertions.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.util
 
 /**
diff --git a/src/main/kotlin/moe/nea/firmament/util/async/input.kt b/src/main/kotlin/moe/nea/firmament/util/async/input.kt
index ac1cfb4..a15e34c 100644
--- a/src/main/kotlin/moe/nea/firmament/util/async/input.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/async/input.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.util.async
 
 import kotlinx.coroutines.suspendCancellableCoroutine
diff --git a/src/main/kotlin/moe/nea/firmament/util/colorconversion.kt b/src/main/kotlin/moe/nea/firmament/util/colorconversion.kt
index 5da9f22..0f77919 100644
--- a/src/main/kotlin/moe/nea/firmament/util/colorconversion.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/colorconversion.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.util
 
 import net.minecraft.text.TextColor
diff --git a/src/main/kotlin/moe/nea/firmament/util/data/DataHolder.kt b/src/main/kotlin/moe/nea/firmament/util/data/DataHolder.kt
index ed33890..3316bf0 100644
--- a/src/main/kotlin/moe/nea/firmament/util/data/DataHolder.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/data/DataHolder.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.util.data
diff --git a/src/main/kotlin/moe/nea/firmament/util/data/IDataHolder.kt b/src/main/kotlin/moe/nea/firmament/util/data/IDataHolder.kt
index 6120df3..1e7853c 100644
--- a/src/main/kotlin/moe/nea/firmament/util/data/IDataHolder.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/data/IDataHolder.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.util.data
diff --git a/src/main/kotlin/moe/nea/firmament/util/data/ProfileSpecificDataHolder.kt b/src/main/kotlin/moe/nea/firmament/util/data/ProfileSpecificDataHolder.kt
index 06523c3..a016c32 100644
--- a/src/main/kotlin/moe/nea/firmament/util/data/ProfileSpecificDataHolder.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/data/ProfileSpecificDataHolder.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.util.data
diff --git a/src/main/kotlin/moe/nea/firmament/util/item/NbtItemData.kt b/src/main/kotlin/moe/nea/firmament/util/item/NbtItemData.kt
index 2e721d8..ac30771 100644
--- a/src/main/kotlin/moe/nea/firmament/util/item/NbtItemData.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/item/NbtItemData.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.util.item
 
 import net.minecraft.item.ItemStack
diff --git a/src/main/kotlin/moe/nea/firmament/util/item/SkullItemData.kt b/src/main/kotlin/moe/nea/firmament/util/item/SkullItemData.kt
index ad9d388..5b440b1 100644
--- a/src/main/kotlin/moe/nea/firmament/util/item/SkullItemData.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/item/SkullItemData.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 @file:UseSerializers(DashlessUUIDSerializer::class, InstantAsLongSerializer::class)
 
 package moe.nea.firmament.util.item
diff --git a/src/main/kotlin/moe/nea/firmament/util/json/DashlessUUIDSerializer.kt b/src/main/kotlin/moe/nea/firmament/util/json/DashlessUUIDSerializer.kt
index 3dca217..de06453 100644
--- a/src/main/kotlin/moe/nea/firmament/util/json/DashlessUUIDSerializer.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/json/DashlessUUIDSerializer.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.util.json
 
 import java.util.UUID
diff --git a/src/main/kotlin/moe/nea/firmament/util/json/InstantAsLongSerializer.kt b/src/main/kotlin/moe/nea/firmament/util/json/InstantAsLongSerializer.kt
index 988c7dd..7263525 100644
--- a/src/main/kotlin/moe/nea/firmament/util/json/InstantAsLongSerializer.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/json/InstantAsLongSerializer.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.util.json
 
 import kotlinx.datetime.Instant
diff --git a/src/main/kotlin/moe/nea/firmament/util/propertyutil.kt b/src/main/kotlin/moe/nea/firmament/util/propertyutil.kt
index 89b8251..7fee804 100644
--- a/src/main/kotlin/moe/nea/firmament/util/propertyutil.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/propertyutil.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.util
 
 import kotlin.properties.ReadOnlyProperty
diff --git a/src/main/kotlin/moe/nea/firmament/util/regex.kt b/src/main/kotlin/moe/nea/firmament/util/regex.kt
index 6317b59..97c2797 100644
--- a/src/main/kotlin/moe/nea/firmament/util/regex.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/regex.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.util
 
 inline fun <T> String.ifMatches(regex: Regex, block: (MatchResult) -> T): T? =
diff --git a/src/main/kotlin/moe/nea/firmament/util/render/RenderInWorldContext.kt b/src/main/kotlin/moe/nea/firmament/util/render/RenderInWorldContext.kt
index 1d51f13..f636529 100644
--- a/src/main/kotlin/moe/nea/firmament/util/render/RenderInWorldContext.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/render/RenderInWorldContext.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.util.render
diff --git a/src/main/kotlin/moe/nea/firmament/util/textutil.kt b/src/main/kotlin/moe/nea/firmament/util/textutil.kt
index 5c443c3..2ed9af3 100644
--- a/src/main/kotlin/moe/nea/firmament/util/textutil.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/textutil.kt
@@ -1,19 +1,7 @@
 /*
- * Firmament is a Hypixel Skyblock mod for modern Minecraft versions
- * Copyright (C) 2023 Linnea Gräf
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
  *
- * 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/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 package moe.nea.firmament.util
diff --git a/src/main/kotlin/moe/nea/firmament/util/uuid.kt b/src/main/kotlin/moe/nea/firmament/util/uuid.kt
index d5409fa..ea7fb89 100644
--- a/src/main/kotlin/moe/nea/firmament/util/uuid.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/uuid.kt
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
 package moe.nea.firmament.util
 
 import java.math.BigInteger
diff --git a/src/main/resources/assets/firmament/icon.png.license b/src/main/resources/assets/firmament/icon.png.license
new file mode 100644
index 0000000..f168dcf
--- /dev/null
+++ b/src/main/resources/assets/firmament/icon.png.license
@@ -0,0 +1,3 @@
+SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+
+SPDX-License-Identifier: CC-BY-4.0
diff --git a/src/main/resources/assets/firmament/lang/en_us.json.license b/src/main/resources/assets/firmament/lang/en_us.json.license
new file mode 100644
index 0000000..c01d463
--- /dev/null
+++ b/src/main/resources/assets/firmament/lang/en_us.json.license
@@ -0,0 +1,3 @@
+SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+
+SPDX-License-Identifier: CC0-1.0
diff --git a/src/main/resources/assets/firmament/logo.kra b/src/main/resources/assets/firmament/logo.kra
deleted file mode 100644
index 1c7cae7..0000000
--- a/src/main/resources/assets/firmament/logo.kra
+++ /dev/null
diff --git a/src/main/resources/assets/firmament/logo.png.license b/src/main/resources/assets/firmament/logo.png.license
new file mode 100644
index 0000000..f168dcf
--- /dev/null
+++ b/src/main/resources/assets/firmament/logo.png.license
@@ -0,0 +1,3 @@
+SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+
+SPDX-License-Identifier: CC-BY-4.0
diff --git a/src/main/resources/assets/firmament/textures/gui/bar.png.license b/src/main/resources/assets/firmament/textures/gui/bar.png.license
new file mode 100644
index 0000000..f168dcf
--- /dev/null
+++ b/src/main/resources/assets/firmament/textures/gui/bar.png.license
@@ -0,0 +1,3 @@
+SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+
+SPDX-License-Identifier: CC-BY-4.0
diff --git a/src/main/resources/fabric.mod.json.license b/src/main/resources/fabric.mod.json.license
new file mode 100644
index 0000000..c01d463
--- /dev/null
+++ b/src/main/resources/fabric.mod.json.license
@@ -0,0 +1,3 @@
+SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+
+SPDX-License-Identifier: CC0-1.0
diff --git a/src/main/resources/firmament.accesswidener b/src/main/resources/firmament.accesswidener
index 8b4f3d7..6038211 100644
--- a/src/main/resources/firmament.accesswidener
+++ b/src/main/resources/firmament.accesswidener
@@ -1,3 +1,6 @@
+# SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+#
+# SPDX-License-Identifier: CC0-1.0
 accessWidener   v2  named
 accessible class net/minecraft/client/render/RenderLayer$MultiPhase
 accessible class net/minecraft/client/render/RenderLayer$MultiPhaseParameters
diff --git a/src/main/resources/firmament.mixins.json.license b/src/main/resources/firmament.mixins.json.license
new file mode 100644
index 0000000..c01d463
--- /dev/null
+++ b/src/main/resources/firmament.mixins.json.license
@@ -0,0 +1,3 @@
+SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+
+SPDX-License-Identifier: CC0-1.0
diff --git a/src/main/resources/hotswap-agent.properties b/src/main/resources/hotswap-agent.properties
index 366227e..36b065f 100644
--- a/src/main/resources/hotswap-agent.properties
+++ b/src/main/resources/hotswap-agent.properties
@@ -1,20 +1,6 @@
+# SPDX-FileCopyrightText: 2023 Linnea Gr�f <nea@nea.moe>
 #
-# Firmament is a Hypixel Skyblock mod for modern Minecraft versions
-# Copyright (C) 2023 Linnea Gräf
-#
-# 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/>.
-#
+# SPDX-License-Identifier: CC0-1.0
 
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