Make reuse compliant

119 files changed, 483 insertions, 812 deletions

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