Move TechHider into new HiderCore module

HiderCore holds the TechHider, ChunkHider and AccessPrivilegeProvider so that
FightSystem and BauSystem can both shade it. BlockIds and ProtocolUtils stay in
SpigotCore (used by AntiNocom and RFallingBlockEntity) and move to
de.steamwar.core to avoid a split package. The access widener entries the
TechHider needs are duplicated into hidercore.accesswidener; the legacy
TechHider still needs its own copies in SpigotCore.

FightSystem/FightSystem_Core/build.gradle.kts

@@ -30,6 +30,7 @@ dependencies {
     compileOnly(libs.classindex)
     annotationProcessor(libs.classindex)
     compileOnly(project(":SpigotCore", "default"))
+    implementation(project(":HiderCore"))
 
     compileOnly(libs.netty)
     compileOnly(libs.paperapi)

FightSystem/FightSystem_Core/src/de/steamwar/fightsystem/record/PacketProcessor.java

@@ -20,6 +20,7 @@
 package de.steamwar.fightsystem.record;
 
 import com.sk89q.worldedit.extent.clipboard.Clipboard;
+import de.steamwar.core.BlockIds;
 import de.steamwar.core.worldedit.WorldEditWrapper;
 import de.steamwar.entity.REntity;
 import de.steamwar.entity.REntityServer;
@@ -40,7 +41,6 @@ import de.steamwar.fightsystem.utils.TechHiderWrapper;
 import de.steamwar.sql.SchematicNode;
 import de.steamwar.sql.SteamwarUser;
 import de.steamwar.sql.Team;
-import de.steamwar.techhider.BlockIds;
 import net.md_5.bungee.api.ChatMessageType;
 import net.md_5.bungee.api.chat.BaseComponent;
 import net.md_5.bungee.api.chat.TextComponent;

FightSystem/FightSystem_Core/src/de/steamwar/fightsystem/utils/Region.java

@@ -19,7 +19,7 @@
 
 package de.steamwar.fightsystem.utils;
 
-import de.steamwar.techhider.ProtocolUtils;
+import de.steamwar.core.ProtocolUtils;
 import lombok.AllArgsConstructor;
 import lombok.Getter;
 import org.bukkit.Location;

HiderCore/build.gradle.kts

@@ -0,0 +1,41 @@
+/*
+ *   This file is a part of the SteamWar software.
+ *
+ *   Copyright (C) 2026 SteamWar.de-Serverteam
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU Affero 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 Affero General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Affero General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+plugins {
+    steamwar.java
+    widener
+}
+
+java {
+    sourceCompatibility = JavaVersion.VERSION_21
+    targetCompatibility = JavaVersion.VERSION_21
+}
+
+dependencies {
+    compileOnly(project(":SpigotCore", "default"))
+
+    compileOnly(libs.paperapi)
+    compileOnly(libs.nms)
+    compileOnly(libs.netty)
+    compileOnly(libs.fastutil)
+}
+
+widener {
+    fromCatalog(libs.nms)
+}

HiderCore/src/de/steamwar/techhider/ChunkHider.java

@@ -19,6 +19,7 @@
 
 package de.steamwar.techhider;
 
+import de.steamwar.core.ProtocolUtils;
 import de.steamwar.techhider.AccessPrivilegeProvider.ForPlayer;
 import io.netty.buffer.ByteBuf;
 import io.netty.buffer.Unpooled;

HiderCore/src/hidercore.accesswidener

@@ -0,0 +1,27 @@
+accessWidener v2 named
+
+# For TechHider
+accessible field net/minecraft/network/protocol/game/ClientboundEntityEventPacket entityId I
+accessible field net/minecraft/network/protocol/game/ClientboundMoveEntityPacket entityId I
+accessible field net/minecraft/network/protocol/game/ClientboundRotateHeadPacket entityId I
+accessible field net/minecraft/network/protocol/game/ClientboundSectionBlocksUpdatePacket sectionPos Lnet/minecraft/core/SectionPos;
+accessible field net/minecraft/network/protocol/game/ClientboundSectionBlocksUpdatePacket positions [S
+accessible field net/minecraft/network/protocol/game/ClientboundSectionBlocksUpdatePacket states [Lnet/minecraft/world/level/block/state/BlockState;
+
+# For ChunkHider
+## transitive-extendable means that a public no args constructor is added without any super initialization
+transitive-extendable class net/minecraft/network/protocol/game/ClientboundLevelChunkWithLightPacket
+accessible field net/minecraft/network/protocol/game/ClientboundLevelChunkWithLightPacket chunkData Lnet/minecraft/network/protocol/game/ClientboundLevelChunkPacketData;
+mutable field net/minecraft/network/protocol/game/ClientboundLevelChunkWithLightPacket chunkData Lnet/minecraft/network/protocol/game/ClientboundLevelChunkPacketData;
+
+## transitive-extendable means that a public no args constructor is added without any super initialization
+transitive-extendable class net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData
+accessible field net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData buffer [B
+mutable field net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData buffer [B
+accessible field net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData blockEntitiesData Ljava/util/List;
+mutable field net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData blockEntitiesData Ljava/util/List;
+
+accessible class net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData$BlockEntityInfo
+accessible field net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData$BlockEntityInfo type Lnet/minecraft/world/level/block/entity/BlockEntityType;
+accessible field net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData$BlockEntityInfo packedXZ I
+accessible field net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData$BlockEntityInfo y I

SpigotCore/SpigotCore_Main/src/de/steamwar/core/BlockIds.java

@@ -17,7 +17,7 @@
  *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-package de.steamwar.techhider;
+package de.steamwar.core;
 
 import net.minecraft.core.registries.BuiltInRegistries;
 import net.minecraft.world.level.block.Block;

SpigotCore/SpigotCore_Main/src/de/steamwar/core/ProtocolUtils.java

@@ -17,7 +17,7 @@
  *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-package de.steamwar.techhider;
+package de.steamwar.core;
 
 import io.netty.buffer.ByteBuf;
 

SpigotCore/SpigotCore_Main/src/de/steamwar/core/events/AntiNocom.java

@@ -21,9 +21,9 @@ package de.steamwar.core.events;
 
 import com.comphenix.tinyprotocol.TinyProtocol;
 import de.steamwar.core.Core;
+import de.steamwar.core.ProtocolUtils;
 import de.steamwar.linkage.Linked;
 import de.steamwar.sql.SWException;
-import de.steamwar.techhider.ProtocolUtils;
 import net.minecraft.core.BlockPos;
 import net.minecraft.network.protocol.game.ServerboundPlayerActionPacket;
 import net.minecraft.network.protocol.game.ServerboundUseItemOnPacket;

SpigotCore/SpigotCore_Main/src/de/steamwar/entity/RFallingBlockEntity.java

@@ -19,7 +19,7 @@
 
 package de.steamwar.entity;
 
-import de.steamwar.techhider.BlockIds;
+import de.steamwar.core.BlockIds;
 import lombok.Getter;
 import lombok.Setter;
 import org.bukkit.Location;

SpigotCore/SpigotCore_Main/src/de/steamwar/techhider/legacy/ChunkHider.java

@@ -19,7 +19,7 @@
 
 package de.steamwar.techhider.legacy;
 
-import de.steamwar.techhider.ProtocolUtils;
+import de.steamwar.core.ProtocolUtils;
 import io.netty.buffer.ByteBuf;
 import io.netty.buffer.Unpooled;
 import lombok.Getter;

SpigotCore/SpigotCore_Main/src/de/steamwar/techhider/legacy/TechHider.java

@@ -20,8 +20,8 @@
 package de.steamwar.techhider.legacy;
 
 import com.comphenix.tinyprotocol.TinyProtocol;
-import de.steamwar.techhider.BlockIds;
-import de.steamwar.techhider.ProtocolUtils;
+import de.steamwar.core.BlockIds;
+import de.steamwar.core.ProtocolUtils;
 import lombok.Getter;
 import net.minecraft.core.BlockPos;
 import net.minecraft.core.Vec3i;

SpigotCore/SpigotCore_Main/src/spigotcore.accesswidener

@@ -33,11 +33,10 @@ mutable field net/minecraft/network/protocol/game/ClientboundEntityEventPacket e
 transitive-extendable class net/minecraft/network/protocol/game/ClientboundRotateHeadPacket
 accessible field net/minecraft/network/protocol/game/ClientboundRotateHeadPacket yHeadRot B
 mutable field net/minecraft/network/protocol/game/ClientboundRotateHeadPacket yHeadRot B
-## + TechHider
 accessible field net/minecraft/network/protocol/game/ClientboundRotateHeadPacket entityId I
 mutable field net/minecraft/network/protocol/game/ClientboundRotateHeadPacket entityId I
 
-# For ChunkHider
+# For legacy/ChunkHider
 ## transitive-extendable means that a public no args constructor is added without any super initialization
 transitive-extendable class net/minecraft/network/protocol/game/ClientboundLevelChunkWithLightPacket
 accessible field net/minecraft/network/protocol/game/ClientboundLevelChunkWithLightPacket chunkData Lnet/minecraft/network/protocol/game/ClientboundLevelChunkPacketData;
@@ -55,8 +54,7 @@ accessible field net/minecraft/network/protocol/game/ClientboundLevelChunkPacket
 accessible field net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData$BlockEntityInfo packedXZ I
 accessible field net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData$BlockEntityInfo y I
 
-# For TechHider
-accessible field net/minecraft/network/protocol/game/ClientboundMoveEntityPacket entityId I
+# For legacy/TechHider
 ## transitive-extendable means that a public no args constructor is added without any super initialization
 transitive-extendable class net/minecraft/network/protocol/game/ClientboundSectionBlocksUpdatePacket
 accessible field net/minecraft/network/protocol/game/ClientboundSectionBlocksUpdatePacket sectionPos Lnet/minecraft/core/SectionPos;
@@ -65,7 +63,6 @@ mutable field net/minecraft/network/protocol/game/ClientboundSectionBlocksUpdate
 accessible field net/minecraft/network/protocol/game/ClientboundSectionBlocksUpdatePacket states [Lnet/minecraft/world/level/block/state/BlockState;
 mutable field net/minecraft/network/protocol/game/ClientboundSectionBlocksUpdatePacket states [Lnet/minecraft/world/level/block/state/BlockState;
 
-# For legacy/TechHider
 ## transitive-extendable means that a public no args constructor is added without any super initialization
 transitive-extendable class net/minecraft/network/protocol/game/ClientboundBlockUpdatePacket
 mutable field net/minecraft/network/protocol/game/ClientboundBlockUpdatePacket blockState Lnet/minecraft/world/level/block/state/BlockState;

settings.gradle.kts

@@ -196,6 +196,8 @@ include(
     "FightSystem:FightSystem_Standalone"
 )
 
+include("HiderCore")
+
 include("KotlinCore")
 
 include("LobbySystem")