ViaRewind 4.2.0

Signed-off-by: Florian Reuth <git@florianreuth.de>

.github/FUNDING.yml

@@ -1,2 +1,2 @@
-github: FlorianMichael
-custom: ['https://florianmichael.de/donate', 'https://creeper123123321.github.io/#donate']
+github: florianreuth
+custom: [ 'https://florianreuth.de/donate', 'https://creeper123123321.github.io/#donate' ]

.github/dependabot.yml

@@ -1,10 +1,22 @@
 version: 2
 updates:
   - package-ecosystem: "gradle"
+    cooldown:
+      default-days: 7
     directory: "/"
     schedule:
-      interval: "daily"
+      interval: "monthly"
+    groups:
+      all-dependencies:
+        patterns:
+          - "*"
   - package-ecosystem: "github-actions"
+    cooldown:
+      default-days: 7
     directory: "/"
     schedule:
-      interval: "weekly"
+      interval: "monthly"
+    groups:
+      all-dependencies:
+        patterns:
+          - "*"

.github/workflows/build.yml

@@ -1,21 +1,32 @@
 name: Build
 on: [pull_request, push, workflow_dispatch]
-
+permissions:
+  contents: read
 jobs:
   build:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-26.04
+    timeout-minutes: 30
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           persist-credentials: false
       - name: Set up Gradle
-        uses: gradle/actions/setup-gradle@v4
-      - name: Set up JDK 17
-        uses: actions/setup-java@v4
+        uses: gradle/actions/setup-gradle@9c971963bec38e04b3d30dcc455b5382be2fdbfb # v6.3.0
+        with:
+          cache-disabled: true
+          cache-provider: basic
+      - name: Set up Java
+        uses: actions/setup-java@dd06d9cba3e5552c54d9f8ea23572deb30010f7c # v6.0.0
         with:
           distribution: 'temurin'
-          java-version: 17
+          java-version: 25
           check-latest: true
       - name: Build with Gradle
-        run: ./gradlew build
+        run: ./gradlew build --stacktrace
+      - name: Upload Artifacts to GitHub
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        with:
+          name: Artifacts
+          path: build/libs/
+          if-no-files-found: error

.github/workflows/publish.yml

@@ -4,26 +4,41 @@ on:
     branches:
       - master
       - dev
+  workflow_dispatch:
+
+permissions:
+  contents: read
 
 jobs:
   publish:
     if: github.repository_owner == 'ViaVersion'
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-26.04
+    timeout-minutes: 30
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           persist-credentials: false
       - name: Set up Gradle
-        uses: gradle/actions/setup-gradle@v4
-      - name: Set up JDK 17
-        uses: actions/setup-java@v4
+        uses: gradle/actions/setup-gradle@9c971963bec38e04b3d30dcc455b5382be2fdbfb # v6.3.0
+        with:
+          cache-disabled: true
+          cache-provider: basic
+      - name: Set up Java
+        uses: actions/setup-java@dd06d9cba3e5552c54d9f8ea23572deb30010f7c # v6.0.0
         with:
           distribution: 'temurin'
-          java-version: 17
+          java-version: 25
           check-latest: true
-      - name: Publish
+      - name: Build with Gradle
+        run: ./gradlew build --stacktrace
+      - name: Publish to Hangar
         env:
           HANGAR_TOKEN: ${{ secrets.HANGAR_TOKEN }}
+        run: ./gradlew publishAllPublicationsToHangar --stacktrace
+        continue-on-error: true
+      - name: Publish to Modrinth
+        env:
           MODRINTH_TOKEN: ${{ secrets.MODRINTH_TOKEN }}
-        run: ./gradlew build modrinth publishAllPublicationsToHangar
+        run: ./gradlew modrinth --stacktrace
+        continue-on-error: true

.gitignore

@@ -13,6 +13,8 @@ classes/
 # Idea
 
 .idea/
+!.idea/copyright/*
+!.idea/scopes/*
 *.iml
 *.ipr
 *.iws
@@ -27,8 +29,8 @@ bin/
 
 # macOS
 
-*.DS_Store
+DS_Store
 
 # Misc
 
-run/
+run/

README.md

@@ -1,4 +1,5 @@
 # ViaRewind
+
 [![Latest Release](https://img.shields.io/github/v/release/ViaVersion/ViaRewind)](https://github.com/ViaVersion/ViaRewind/releases)
 [![Build Status](https://github.com/ViaVersion/ViaRewind/actions/workflows/build.yml/badge.svg?branch=master)](https://github.com/ViaVersion/ViaRewind/actions)
 [![Discord](https://img.shields.io/badge/chat-on%20discord-blue.svg)](https://viaversion.com/discord)
@@ -6,13 +7,17 @@
 **ViaVersion addon to allow 1.8.x and 1.7.x clients on newer server versions.** <br>
 Runs on 1.9-latest servers or 1.8 clients and lower.
 
-**You can override the included version in [ViaFabric](https://modrinth.com/mod/viafabric) or [ViaProxy](https://github.com/ViaVersion/ViaProxy):**
+**You can override the included version in [ViaFabric](https://modrinth.com/mod/viafabric)
+or [ViaProxy](https://github.com/ViaVersion/ViaProxy):**
+
 - in **ViaFabric**, put ViaRewind into the `mods` folder
 - in **ViaProxy**, put ViaRewind into the `jars` folder
 
-Note: when using ViaFabric <= 1.16.5 or J8 ViaProxy builds, you need [J8 ViaRewind](https://ci.viaversion.com/view/ViaRewind/job/ViaRewind-Java8/) builds.
+Note: when using ViaFabric <= 1.16.5 or J8 ViaProxy builds, you
+need [J8 ViaRewind](https://ci.viaversion.com/view/ViaRewind/job/ViaRewind-Java8/) builds.
 
-**Requires [ViaVersion](https://hangar.papermc.io/ViaVersion/ViaVersion) and [ViaBackwards](https://hangar.papermc.io/ViaVersion/ViaBackwards) to be installed..**
+**Requires [ViaVersion](https://hangar.papermc.io/ViaVersion/ViaVersion)
+and [ViaBackwards](https://hangar.papermc.io/ViaVersion/ViaBackwards) to be installed..**
 
 Releases/Dev Builds
 -

SECURITY.md

@@ -0,0 +1,15 @@
+# Security Policy
+
+## Reporting a Vulnerability
+
+If you discover a **security vulnerability**, please **do not** open a public issue. Instead, use one of the following 
+**confidential contact methods**:
+
+* **Email:** [security@viaversion.com](mailto:security@viaversion.com)
+* **Discord:** Join our [Discord server](https://discord.gg/viaversion) and visit
+  the [#exploit-report](https://discord.com/channels/316206679014244363/1388847764137316485) channel for further
+  instructions.
+
+If your issue is **not security-related** (e.g., bug reports, feature requests, or usage questions), please use
+the [GitHub Issues page](https://github.com/ViaVersion/ViaRewind/issues) or contact us via
+the [Discord server](https://discord.gg/viaversion).

build.gradle.kts

@@ -1,10 +1,17 @@
-import de.florianmichael.baseproject.*
+import de.florianreuth.baseproject.core.configureEmbeddedDependencies
+import de.florianreuth.baseproject.integration.branchName
+import de.florianreuth.baseproject.integration.latestCommitHash
+import de.florianreuth.baseproject.integration.latestCommitMessage
+import de.florianreuth.baseproject.setupProject
+import de.florianreuth.baseproject.setupViaPublishing
+import net.raphimc.classtokenreplacer.extension.ClassTokenReplacerExtension
 
 plugins {
     `java-library`
     id("io.papermc.hangar-publish-plugin")
     id("com.modrinth.minotaur")
-    id("de.florianmichael.baseproject.BaseProject")
+    id("de.florianreuth.baseproject")
+    id("net.raphimc.class-token-replacer") apply false
 }
 
 allprojects {
@@ -13,7 +20,6 @@ allprojects {
     setupViaPublishing()
 
     repositories {
-        mavenCentral()
         maven("https://repo.viaversion.com")
         maven("https://repo.papermc.io/repository/maven-public")
         maven("https://maven.fabricmc.net")
@@ -21,11 +27,22 @@ allprojects {
 
 }
 
+val commitHash = latestCommitHash()
+
 subprojects {
 
+    apply(plugin = "net.raphimc.class-token-replacer")
+
     dependencies {
-        compileOnly("com.viaversion:viaversion:5.4.0")
-        compileOnly("com.viaversion:viabackwards:5.4.0")
+        compileOnly("com.viaversion:viaversion:5.12.0")
+        compileOnly("com.viaversion:viabackwards:5.12.0")
+    }
+
+    extensions.getByType<SourceSetContainer>().configureEach {
+        extensions.getByType(ClassTokenReplacerExtension::class.java).apply {
+            property("\${version}", project.version)
+            property("\${impl_version}", "git-ViaRewind-${project.version}:${commitHash}")
+        }
     }
 
     tasks {
@@ -33,18 +50,14 @@ subprojects {
             val projectVersion = project.version
             val projectDescription = project.description
             filesMatching(listOf("plugin.yml", "fabric.mod.json", "META-INF/sponge_plugins.json")) {
-                expand("version" to projectVersion, "description" to projectDescription)
+                expand(mapOf("version" to projectVersion, "description" to projectDescription))
             }
         }
     }
 
 }
 
-base {
-    archivesName.set("ViaRewind")
-}
-
-val shade = configureShadedDependencies()
+val shade = configureEmbeddedDependencies()
 
 dependencies {
     subprojects.forEach {

bukkit/src/main/java/com/viaversion/viarewind/BukkitPlugin.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -18,14 +18,22 @@
 package com.viaversion.viarewind;
 
 import com.viaversion.viarewind.api.ViaRewindPlatform;
+import com.viaversion.viarewind.protocol.v1_9to1_8.provider.InventoryProvider;
+import com.viaversion.viarewind.provider.BukkitInventoryProvider;
 import com.viaversion.viaversion.api.Via;
-import org.bukkit.plugin.java.JavaPlugin;
-
 import java.io.File;
+import com.viaversion.viaversion.api.platform.providers.ViaProviders;
+import org.bukkit.plugin.java.JavaPlugin;
 
 public class BukkitPlugin extends JavaPlugin implements ViaRewindPlatform {
 
-	public BukkitPlugin() {
-		Via.getManager().addEnableListener(() -> this.init(new File(getDataFolder(), "config.yml")));
-	}
+    public BukkitPlugin() {
+        Via.getManager().addEnableListener(() -> this.init(new File(getDataFolder(), "config.yml")));
+    }
+
+    @Override
+    public void onEnable() {
+        final ViaProviders providers = Via.getManager().getProviders();
+        providers.use(InventoryProvider.class, new BukkitInventoryProvider());
+    }
 }

bukkit/src/main/java/com/viaversion/viarewind/provider/BukkitInventoryProvider.java

@@ -0,0 +1,36 @@
+/*
+ * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
+ * Copyright (C) 2018-2026 ViaVersion and contributors
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viarewind.provider;
+
+import com.viaversion.viarewind.protocol.v1_9to1_8.provider.InventoryProvider;
+import com.viaversion.viaversion.api.connection.UserConnection;
+import org.bukkit.Bukkit;
+import org.bukkit.Material;
+import org.bukkit.entity.Player;
+import org.bukkit.inventory.ItemStack;
+
+public final class BukkitInventoryProvider extends InventoryProvider {
+
+    @Override
+    public boolean hasElytra(final UserConnection connection) {
+        final Player player = Bukkit.getPlayer(connection.getProtocolInfo().getUuid());
+        final ItemStack chestplate = player.getInventory().getChestplate();
+        return chestplate != null && chestplate.getType() == Material.ELYTRA;
+    }
+
+}

bukkit/src/main/resources/plugin.yml

@@ -1,10 +1,10 @@
 name: ViaRewind
 main: com.viaversion.viarewind.BukkitPlugin
-authors: [FlorianMichael/EnZaXD, Gerrygames, creeper123123321]
+authors: [ EnZaXD, Gerrygames, creeper123123321 ]
 version: ${version}
 description: ${description}
 website: https://viaversion.com/rewind
 api-version: 1.13
 folia-supported: true
 load: STARTUP
-depend: [ViaVersion, ViaBackwards]
+depend: [ ViaVersion, ViaBackwards ]

common/build.gradle.kts

@@ -1,29 +1,15 @@
-import de.florianmichael.baseproject.*
-
-plugins {
-    id("net.raphimc.class-token-replacer")
-}
-
 val viaProxy: Configuration by configurations.creating
 
 dependencies {
     compileOnly("io.netty:netty-all:4.0.20.Final")
     compileOnly("com.google.guava:guava:17.0")
+    compileOnly("com.velocitypowered:velocity-native:3.4.0-SNAPSHOT")
 
-    viaProxy("net.raphimc:ViaProxy:3.4.2-SNAPSHOT") {
+    viaProxy("net.raphimc:ViaProxy:[3.0.0,4.0.0)") {
         isTransitive = false
     }
 }
 
-sourceSets.configureEach {
-    classTokenReplacer {
-        replaceInPlace.set(true)
-
-        property("\${version}", project.version)
-        property("\${impl_version}", "git-ViaRewind-${project.version}:${latestCommitHash()}")
-    }
-}
-
 // Task to quickly test/debug code changes using https://github.com/ViaVersion/ViaProxy
 // For further instructions see the ViaProxy repository README
 val prepareViaProxyFiles by tasks.registering(Copy::class) {

common/src/main/java/com/viaversion/viarewind/ViaRewind.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -23,21 +23,21 @@ import com.viaversion.viarewind.api.ViaRewindPlatform;
 
 public class ViaRewind {
 
-	private static ViaRewindPlatform platform;
-	private static ViaRewindConfig config;
+    private static ViaRewindPlatform platform;
+    private static ViaRewindConfig config;
 
-	public static void init(ViaRewindPlatform platform, ViaRewindConfig config) {
-		Preconditions.checkArgument(ViaRewind.platform == null, "ViaRewind is already initialized");
+    public static void init(ViaRewindPlatform platform, ViaRewindConfig config) {
+        Preconditions.checkArgument(ViaRewind.platform == null, "ViaRewind is already initialized");
 
-		ViaRewind.platform = platform;
-		ViaRewind.config = config;
-	}
+        ViaRewind.platform = platform;
+        ViaRewind.config = config;
+    }
 
-	public static ViaRewindPlatform getPlatform() {
-		return ViaRewind.platform;
-	}
+    public static ViaRewindPlatform getPlatform() {
+        return ViaRewind.platform;
+    }
 
-	public static ViaRewindConfig getConfig() {
-		return ViaRewind.config;
-	}
+    public static ViaRewindConfig getConfig() {
+        return ViaRewind.config;
+    }
 }

common/src/main/java/com/viaversion/viarewind/ViaRewindConfig.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -18,7 +18,6 @@
 package com.viaversion.viarewind;
 
 import com.viaversion.viaversion.util.Config;
-
 import java.io.File;
 import java.io.InputStream;
 import java.net.URL;
@@ -29,105 +28,105 @@ import java.util.logging.Logger;
 
 public class ViaRewindConfig extends Config implements com.viaversion.viarewind.api.ViaRewindConfig {
 
-	private CooldownIndicator cooldownIndicator;
-	private boolean replaceAdventureMode;
-	private boolean replaceParticles;
-	private int maxBookPages;
-	private int maxBookPageSize;
-	private boolean emulateWorldBorder;
-	private boolean alwaysShowOriginalMobName;
-	private String worldBorderParticle;
-	private boolean enableOffhand;
-	private String offhandCommand;
-	private boolean emulateLevitationEffect;
-	private boolean handlePlayerCombatPacket;
+    private CooldownIndicator cooldownIndicator;
+    private boolean replaceAdventureMode;
+    private boolean replaceParticles;
+    private int maxBookPages;
+    private int maxBookPageSize;
+    private boolean emulateWorldBorder;
+    private boolean alwaysShowOriginalMobName;
+    private String worldBorderParticle;
+    private boolean enableOffhand;
+    private String offhandCommand;
+    private boolean emulateLevitationEffect;
+    private boolean handlePlayerCombatPacket;
 
     public ViaRewindConfig(File configFile, Logger logger) {
         super(configFile, logger);
     }
 
-	@Override
-	public void reload() {
-		super.reload();
-		loadFields();
-	}
+    @Override
+    public void reload() {
+        super.reload();
+        loadFields();
+    }
 
-	private void loadFields() {
-		cooldownIndicator = CooldownIndicator.valueOf(getString("cooldown-indicator", "TITLE").toUpperCase());
-		replaceAdventureMode = getBoolean("replace-adventure", false);
-		replaceParticles = getBoolean("replace-particles", false);
-		maxBookPages = getInt("max-book-pages", 100);
-		maxBookPageSize = getInt("max-book-page-length", 5000);
-		emulateWorldBorder = getBoolean("emulate-world-border", true);
-		alwaysShowOriginalMobName = getBoolean("always-show-original-mob-name", true);
-		worldBorderParticle = getString("world-border-particle", "fireworksSpark");
-		enableOffhand = getBoolean("enable-offhand", true);
-		offhandCommand = getString("offhand-command", "/offhand");
-		emulateLevitationEffect = getBoolean("emulate-levitation-effect", true);
-		handlePlayerCombatPacket = getBoolean("handle-player-combat-packet", true);
-	}
+    private void loadFields() {
+        cooldownIndicator = CooldownIndicator.valueOf(getString("cooldown-indicator", "TITLE").toUpperCase());
+        replaceAdventureMode = getBoolean("replace-adventure", false);
+        replaceParticles = getBoolean("replace-particles", false);
+        maxBookPages = getInt("max-book-pages", 100);
+        maxBookPageSize = getInt("max-book-page-length", 5000);
+        emulateWorldBorder = getBoolean("emulate-world-border", true);
+        alwaysShowOriginalMobName = getBoolean("always-show-original-mob-name", true);
+        worldBorderParticle = getString("world-border-particle", "fireworksSpark");
+        enableOffhand = getBoolean("enable-offhand", true);
+        offhandCommand = getString("offhand-command", "/offhand");
+        emulateLevitationEffect = getBoolean("emulate-levitation-effect", true);
+        handlePlayerCombatPacket = getBoolean("handle-player-combat-packet", true);
+    }
 
-	@Override
+    @Override
     public CooldownIndicator getCooldownIndicator() {
-		return cooldownIndicator;
+        return cooldownIndicator;
     }
 
     @Override
     public boolean isReplaceAdventureMode() {
-		return replaceAdventureMode;
+        return replaceAdventureMode;
     }
 
     @Override
     public boolean isReplaceParticles() {
-		return replaceParticles;
+        return replaceParticles;
     }
 
     @Override
     public int getMaxBookPages() {
-		return maxBookPages;
+        return maxBookPages;
     }
 
     @Override
     public int getMaxBookPageSize() {
-		return maxBookPageSize;
+        return maxBookPageSize;
     }
 
-	@Override
-	public boolean isEmulateWorldBorder() {
-		return emulateWorldBorder;
-	}
+    @Override
+    public boolean isEmulateWorldBorder() {
+        return emulateWorldBorder;
+    }
 
-	@Override
-	public boolean alwaysShowOriginalMobName() {
-		return alwaysShowOriginalMobName;
-	}
+    @Override
+    public boolean alwaysShowOriginalMobName() {
+        return alwaysShowOriginalMobName;
+    }
 
-	@Override
-	public String getWorldBorderParticle() {
-		return worldBorderParticle;
-	}
+    @Override
+    public String getWorldBorderParticle() {
+        return worldBorderParticle;
+    }
 
-	@Override
-	public boolean isEnableOffhand() {
-		return enableOffhand;
-	}
+    @Override
+    public boolean isEnableOffhand() {
+        return enableOffhand;
+    }
 
-	@Override
-	public String getOffhandCommand() {
-		return offhandCommand;
-	}
+    @Override
+    public String getOffhandCommand() {
+        return offhandCommand;
+    }
 
-	@Override
-	public boolean emulateLevitationEffect() {
-		return emulateLevitationEffect;
-	}
+    @Override
+    public boolean emulateLevitationEffect() {
+        return emulateLevitationEffect;
+    }
 
-	@Override
-	public boolean handlePlayerCombatPacket() {
-		return handlePlayerCombatPacket;
-	}
+    @Override
+    public boolean handlePlayerCombatPacket() {
+        return handlePlayerCombatPacket;
+    }
 
-	@Override
+    @Override
     public URL getDefaultConfigURL() {
         return getClass().getClassLoader().getResource("assets/viarewind/config.yml");
     }

common/src/main/java/com/viaversion/viarewind/ViaRewindPlatformImpl.java

@@ -0,0 +1,43 @@
+/*
+ * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
+ * Copyright (C) 2018-2026 ViaVersion and contributors
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viarewind;
+
+import com.viaversion.viarewind.api.ViaRewindPlatform;
+import com.viaversion.viaversion.api.Via;
+import java.io.File;
+import java.util.logging.Logger;
+
+public class ViaRewindPlatformImpl implements ViaRewindPlatform {
+
+    private final Logger logger;
+
+    public ViaRewindPlatformImpl() {
+        logger = Via.getPlatform().createLogger("ViaRewind");
+        init(new File(getDataFolder(), "viarewind.yml"));
+    }
+
+    @Override
+    public Logger getLogger() {
+        return logger;
+    }
+
+    @Override
+    public File getDataFolder() {
+        return Via.getPlatform().getDataFolder();
+    }
+}

common/src/main/java/com/viaversion/viarewind/api/ViaRewindConfig.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -24,97 +24,97 @@ import com.viaversion.viaversion.api.configuration.Config;
  */
 public interface ViaRewindConfig extends Config {
 
-	enum CooldownIndicator {
-		TITLE, ACTION_BAR, BOSS_BAR, DISABLED
-	}
+    /**
+     * Specifies how 1.8.x clients should see the cooldown indicator
+     * You can choose between TITLE, ACTION_BAR, BOSS_BAR and DISABLED
+     * ONLY DISABLE IF YOU HAVE 1.9 COOLDOWN DISABLED ON YOUR SERVER
+     * 1.8 PLAYERS MAY ASK WHY PVP IS NOT WORKING OTHERWISE
+     *
+     * @return the cooldown indicator
+     */
+    CooldownIndicator getCooldownIndicator();
 
-	/**
-	 * Specifies how 1.8.x clients should see the cooldown indicator
-	 * You can choose between TITLE, ACTION_BAR, BOSS_BAR and DISABLED
-	 * ONLY DISABLE IF YOU HAVE 1.9 COOLDOWN DISABLED ON YOUR SERVER
-	 * 1.8 PLAYERS MAY ASK WHY PVP IS NOT WORKING OTHERWISE
-	 *
-	 * @return the cooldown indicator
-	 */
-	CooldownIndicator getCooldownIndicator();
+    /**
+     * Replaces Adventure mode with Survival mode for 1.7.x clients
+     * Enable this option if your server is using the 'CanDestroy'
+     * or 'CanPlaceOn' flags on items
+     *
+     * @return true if enabled
+     */
+    boolean isReplaceAdventureMode();
 
-	/**
-	 * Replaces Adventure mode with Survival mode for 1.7.x clients
-	 * Enable this option if your server is using the 'CanDestroy'
-	 * or 'CanPlaceOn' flags on items
-	 *
-	 * @return true if enabled
-	 */
-	boolean isReplaceAdventureMode();
+    /**
+     * Whether 1.9 particles should be replaced by similar ones in
+     * 1.8 and lower
+     *
+     * @return true if enabled
+     */
+    boolean isReplaceParticles();
 
-	/**
-	 * Whether 1.9 particles should be replaced by similar ones in
-	 * 1.8 and lower
-	 *
-	 * @return true if enabled
-	 */
-	boolean isReplaceParticles();
+    /**
+     * Max amount of pages for written books before a client gets kicked
+     *
+     * @return the max amount of pages
+     */
+    int getMaxBookPages();
 
-	/**
-	 * Max amount of pages for written books before a client gets kicked
-	 *
-	 * @return the max amount of pages
-	 */
-	int getMaxBookPages();
+    /**
+     * Max amount of characters in the json (!) string of a book page before a client gets kicked
+     *
+     * @return the max amount of characters
+     */
+    int getMaxBookPageSize();
 
-	/**
-	 * Max amount of characters in the json (!) string of a book page before a client gets kicked
-	 *
-	 * @return the max amount of characters
-	 */
-	int getMaxBookPageSize();
+    /**
+     * Whether to emulate the 1.8+ world border for 1.7.x clients
+     *
+     * @return true if enabled
+     */
+    boolean isEmulateWorldBorder();
 
-	/**
-	 * Whether to emulate the 1.8+ world border for 1.7.x clients
-	 *
-	 * @return true if enabled
-	 */
-	boolean isEmulateWorldBorder();
+    /**
+     * Always shows the original mob's name instead of only when hovering over them with the cursor.
+     *
+     * @return true if enabled
+     */
+    boolean alwaysShowOriginalMobName();
 
-	/**
-	 * Always shows the original mob's name instead of only when hovering over them with the cursor.
-	 *
-	 * @return true if enabled
-	 */
-	boolean alwaysShowOriginalMobName();
+    /**
+     * The particle to show the world border for the 1.8+ world border for 1.7.x clients
+     *
+     * @return the particle name
+     */
+    String getWorldBorderParticle();
 
-	/**
-	 * The particle to show the world border for the 1.8+ world border for 1.7.x clients
-	 *
-	 * @return the particle name
-	 */
-	String getWorldBorderParticle();
+    /**
+     * If enabled, 1.8 players on 1.9+ servers can use /offhand to switch items between their main hand and offhand.
+     *
+     * @return true if enabled
+     */
+    boolean isEnableOffhand();
 
-	/**
-	 * If enabled, 1.8 players on 1.9+ servers can use /offhand to switch items between their main hand and offhand.
-	 *
-	 * @return true if enabled
-	 */
-	boolean isEnableOffhand();
+    /**
+     * Allows to define the offhand command
+     *
+     * @return the offhand command
+     */
+    String getOffhandCommand();
 
-	/**
-	 * Allows to define the offhand command
-	 *
-	 * @return the offhand command
-	 */
-	String getOffhandCommand();
+    /**
+     * If enabled, 1.8 players on 1.9+ servers will also experience the levitation effect by sending velocity packets.
+     *
+     * @return true if enabled
+     */
+    boolean emulateLevitationEffect();
 
-	/**
-	 * If enabled, 1.8 players on 1.9+ servers will also experience the levitation effect by sending velocity packets.
-	 *
-	 * @return true if enabled
-	 */
-	boolean emulateLevitationEffect();
+    /**
+     * If enabled, 1.8 players will handle the player combat packet added in 1.9 by showing the custom death message above the hotbar.
+     *
+     * @return true if enabled
+     */
+    boolean handlePlayerCombatPacket();
 
-	/**
-	 * If enabled, 1.8 players will handle the player combat packet added in 1.9 by showing the custom death message above the hotbar.
-	 *
-	 * @return true if enabled
-	 */
-	boolean handlePlayerCombatPacket();
+    enum CooldownIndicator {
+        TITLE, ACTION_BAR, BOSS_BAR, DISABLED
+    }
 }

common/src/main/java/com/viaversion/viarewind/api/ViaRewindPlatform.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -25,7 +25,6 @@ import com.viaversion.viarewind.protocol.v1_9to1_8.Protocol1_9To1_8;
 import com.viaversion.viaversion.api.Via;
 import com.viaversion.viaversion.api.protocol.ProtocolManager;
 import com.viaversion.viaversion.api.protocol.version.ProtocolVersion;
-
 import java.io.File;
 import java.util.logging.Logger;
 
@@ -34,59 +33,62 @@ import java.util.logging.Logger;
  */
 public interface ViaRewindPlatform {
 
-	String VERSION = "${version}";
-	String IMPL_VERSION = "${impl_version}";
+    String VERSION = "${version}";
+    String IMPL_VERSION = "${impl_version}";
 
-	/**
-	 * Initialize ViaRewind
-	 */
-	default void init(final File configFile) {
-		ViaRewindConfig config = new ViaRewindConfig(configFile, getLogger());
-		config.reload();
-		Via.getManager().getConfigurationProvider().register(config);
+    default void init(final File configFile) {
+        init(new ViaRewindConfig(configFile, getLogger()));
+    }
 
-		ViaRewind.init(this, config);
+    /**
+     * Initialize ViaRewind
+     */
+    default void init(final com.viaversion.viarewind.api.ViaRewindConfig config) {
+        config.reload();
+        Via.getManager().getConfigurationProvider().register(config);
 
-		Via.getManager().getSubPlatforms().add(IMPL_VERSION);
+        ViaRewind.init(this, config);
 
-		getLogger().info("Registering protocols...");
-		final ProtocolManager protocolManager = Via.getManager().getProtocolManager();
-		protocolManager.registerProtocol(new Protocol1_7_6_10To1_7_2_5(), ProtocolVersion.v1_7_2, ProtocolVersion.v1_7_6);
-		protocolManager.registerProtocol(new Protocol1_8To1_7_6_10(), ProtocolVersion.v1_7_6, ProtocolVersion.v1_8);
+        Via.getManager().getSubPlatforms().add(IMPL_VERSION);
 
-		protocolManager.registerProtocol(new Protocol1_9To1_8(), ProtocolVersion.v1_8, ProtocolVersion.v1_9);
-	}
+        getLogger().info("Registering protocols...");
+        final ProtocolManager protocolManager = Via.getManager().getProtocolManager();
+        protocolManager.registerProtocol(new Protocol1_7_6_10To1_7_2_5(), ProtocolVersion.v1_7_2, ProtocolVersion.v1_7_6);
+        protocolManager.registerProtocol(new Protocol1_8To1_7_6_10(), ProtocolVersion.v1_7_6, ProtocolVersion.v1_8);
 
-	/**
-	 * Get the platform logger
-	 *
-	 * @return the logger
-	 */
-	Logger getLogger();
+        protocolManager.registerProtocol(new Protocol1_9To1_8(), ProtocolVersion.v1_8, ProtocolVersion.v1_9);
+    }
 
-	/**
-	 * Returns ViaRewind's data folder.
-	 *
-	 * @return data folder
-	 */
-	File getDataFolder();
+    /**
+     * Get the platform logger
+     *
+     * @return the logger
+     */
+    Logger getLogger();
 
-	/**
-	 * Returns the platform's compression handler name. Only used in the 1.8 -> 1.7 protocol.
-	 *
-	 * @return the compression handler name
-	 */
-	default String compressHandlerName() {
-		return "compress";
-	}
+    /**
+     * Returns ViaRewind's data folder.
+     *
+     * @return data folder
+     */
+    File getDataFolder();
 
-	/**
-	 * Returns the platform's decompression handler name. Only used in the 1.8 -> 1.7 protocol.
-	 *
-	 * @return the decompression handler name
-	 */
-	default String decompressHandlerName() {
-		return "decompress";
-	}
+    /**
+     * Returns the platform's compression handler name. Only used in the 1.8 -> 1.7 protocol.
+     *
+     * @return the compression handler name
+     */
+    default String compressHandlerName() {
+        return "compress";
+    }
+
+    /**
+     * Returns the platform's decompression handler name. Only used in the 1.8 -> 1.7 protocol.
+     *
+     * @return the decompression handler name
+     */
+    default String decompressHandlerName() {
+        return "decompress";
+    }
 
 }

common/src/main/java/com/viaversion/viarewind/api/compression/ThreadLocalCompressionProvider.java

@@ -0,0 +1,157 @@
+/*
+ * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
+ * Copyright (C) 2018-2026 ViaVersion and contributors
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viarewind.api.compression;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufAllocator;
+
+import java.util.zip.DataFormatException;
+import java.util.zip.Deflater;
+import java.util.zip.Inflater;
+
+/**
+ * A ThreadLocal-based compression provider that either uses Velocity's native compression
+ * or falls back to Java's built-in compression (Deflater/Inflater).
+ */
+public final class ThreadLocalCompressionProvider {
+
+    private static final boolean VELOCITY_NATIVES_AVAILABLE;
+
+    static {
+        boolean velocityAvailable = false;
+        try {
+            Class.forName("com.velocitypowered.natives.compression.VelocityCompressor");
+            velocityAvailable = true;
+        } catch (final ClassNotFoundException ignored) {
+        }
+        VELOCITY_NATIVES_AVAILABLE = velocityAvailable;
+    }
+
+    // ThreadLocal for Java's Deflater (used when Velocity natives are not available)
+    private static final ThreadLocal<Deflater> JAVA_DEFLATER = ThreadLocal.withInitial(Deflater::new);
+
+    // ThreadLocal for Java's Inflater (used when Velocity natives are not available)
+    private static final ThreadLocal<Inflater> JAVA_INFLATER = ThreadLocal.withInitial(Inflater::new);
+
+    private ThreadLocalCompressionProvider() {
+    }
+
+    /**
+     * Compresses data from the source buffer into the destination buffer.
+     *
+     * @param source      the source buffer containing uncompressed data
+     * @param destination the destination buffer to write compressed data to
+     * @throws DataFormatException if compression fails
+     */
+    public static void deflate(final ByteBuf source, final ByteBuf destination) throws DataFormatException {
+        if (VELOCITY_NATIVES_AVAILABLE) {
+            deflateVelocity(source, destination);
+        } else {
+            deflateJava(source, destination);
+        }
+    }
+
+
+    /**
+     * Decompresses data from the source buffer into the destination buffer.
+     *
+     * @param source        the source buffer containing compressed data
+     * @param destination   the destination buffer to write decompressed data to
+     * @param expectedSize  the expected size of the decompressed data
+     * @throws DataFormatException if decompression fails
+     */
+    public static void inflate(final ByteBuf source, final ByteBuf destination, final int expectedSize) throws DataFormatException {
+        if (VELOCITY_NATIVES_AVAILABLE) {
+            inflateVelocity(source, destination, expectedSize);
+        } else {
+            inflateJava(source, destination, expectedSize);
+        }
+    }
+
+    // Java native implementation
+
+    private static void deflateJava(final ByteBuf source, final ByteBuf destination) throws DataFormatException {
+        ByteBuf temp = source;
+        if (!source.hasArray()) {
+            temp = ByteBufAllocator.DEFAULT.heapBuffer().writeBytes(source);
+        } else {
+            source.retain();
+        }
+        ByteBuf output = ByteBufAllocator.DEFAULT.heapBuffer();
+        try {
+            final Deflater deflater = JAVA_DEFLATER.get();
+            deflater.setInput(temp.array(), temp.arrayOffset() + temp.readerIndex(), temp.readableBytes());
+            deflater.finish();
+
+            while (!deflater.finished()) {
+                output.ensureWritable(4096);
+                output.writerIndex(output.writerIndex() + deflater.deflate(output.array(), output.arrayOffset() + output.writerIndex(), output.writableBytes()));
+            }
+            destination.writeBytes(output);
+        } finally {
+            output.release();
+            temp.release();
+            JAVA_DEFLATER.get().reset();
+        }
+    }
+
+
+    private static void inflateJava(final ByteBuf source, final ByteBuf destination, final int expectedSize) throws DataFormatException {
+        ByteBuf temp = source;
+        if (!source.hasArray()) {
+            temp = ByteBufAllocator.DEFAULT.heapBuffer().writeBytes(source);
+        } else {
+            source.retain();
+        }
+        ByteBuf output = ByteBufAllocator.DEFAULT.heapBuffer(expectedSize, expectedSize);
+        try {
+            final Inflater inflater = JAVA_INFLATER.get();
+            inflater.setInput(temp.array(), temp.arrayOffset() + temp.readerIndex(), temp.readableBytes());
+            output.writerIndex(output.writerIndex() + inflater.inflate(output.array(), output.arrayOffset(), expectedSize));
+            destination.writeBytes(output);
+        } finally {
+            output.release();
+            temp.release();
+            JAVA_INFLATER.get().reset();
+        }
+    }
+
+    // Velocity native implementation
+    private static void deflateVelocity(final ByteBuf source, final ByteBuf destination) throws DataFormatException {
+        VelocityHolder.deflate(source, destination);
+    }
+
+    private static void inflateVelocity(final ByteBuf source, final ByteBuf destination, final int expectedSize) throws DataFormatException {
+        VelocityHolder.inflate(source, destination, expectedSize);
+    }
+
+    private static final class VelocityHolder {
+
+        private static final ThreadLocal<com.velocitypowered.natives.compression.VelocityCompressor> COMPRESSOR =
+                ThreadLocal.withInitial(() -> com.velocitypowered.natives.util.Natives.compress.get().create(-1));
+
+        static void deflate(final ByteBuf source, final ByteBuf destination) throws DataFormatException {
+            COMPRESSOR.get().deflate(source, destination);
+        }
+
+        static void inflate(final ByteBuf source, final ByteBuf destination, final int expectedSize) throws DataFormatException {
+            COMPRESSOR.get().inflate(source, destination, expectedSize);
+        }
+    }
+}
+

common/src/main/java/com/viaversion/viarewind/api/data/RewindMappingData.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -17,25 +17,33 @@
  */
 package com.viaversion.viarewind.api.data;
 
+import com.viaversion.nbt.tag.CompoundTag;
 import com.viaversion.viabackwards.api.data.BackwardsMappingData;
 import com.viaversion.viarewind.ViaRewind;
-import com.viaversion.nbt.tag.CompoundTag;
-
+import com.viaversion.viaversion.api.data.FullMappings;
+import com.viaversion.viaversion.api.data.LegacyFullStringMappingsBase;
+import com.viaversion.viaversion.api.data.MappingDataLoader;
+import com.viaversion.viaversion.api.data.Mappings;
 import java.util.logging.Logger;
 
 public class RewindMappingData extends BackwardsMappingData {
 
-	public RewindMappingData(String unmappedVersion, String mappedVersion) {
-		super(unmappedVersion, mappedVersion);
-	}
+    public RewindMappingData(String unmappedVersion, String mappedVersion) {
+        super(unmappedVersion, mappedVersion);
+    }
 
-	@Override
-	protected Logger getLogger() {
-		return ViaRewind.getPlatform().getLogger();
-	}
+    @Override
+    protected Logger getLogger() {
+        return ViaRewind.getPlatform().getLogger();
+    }
 
-	@Override
-	protected CompoundTag readMappingsFile(String name) {
-		return RewindMappingDataLoader.INSTANCE.loadNBTFromDir(name);
-	}
+    @Override
+    protected CompoundTag readMappingsFile(String name) {
+        return RewindMappingDataLoader.INSTANCE.loadNBTFromDir(name);
+    }
+
+    @Override
+    protected FullMappings createFullMappings(MappingDataLoader.IdentifiersPair identifiersPair, Mappings mappings) {
+        return new LegacyFullStringMappingsBase(identifiersPair, mappings);
+    }
 }

common/src/main/java/com/viaversion/viarewind/api/data/RewindMappingDataLoader.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -19,26 +19,25 @@ package com.viaversion.viarewind.api.data;
 
 import com.viaversion.viabackwards.api.data.BackwardsMappingDataLoader;
 import com.viaversion.viarewind.ViaRewind;
-
 import java.io.File;
 import java.util.logging.Logger;
 
 public class RewindMappingDataLoader extends BackwardsMappingDataLoader {
 
-	public static final RewindMappingDataLoader INSTANCE = new RewindMappingDataLoader();
+    public static final RewindMappingDataLoader INSTANCE = new RewindMappingDataLoader();
 
-	public RewindMappingDataLoader() {
-		super(RewindMappingDataLoader.class, "assets/viarewind/data/");
-	}
+    public RewindMappingDataLoader() {
+        super(RewindMappingDataLoader.class, "assets/viarewind/data/");
+    }
 
 
-	@Override
-	public Logger getLogger() {
-		return ViaRewind.getPlatform().getLogger();
-	}
+    @Override
+    public Logger getLogger() {
+        return ViaRewind.getPlatform().getLogger();
+    }
 
-	@Override
-	public File getDataFolder() {
-		return ViaRewind.getPlatform().getDataFolder();
-	}
+    @Override
+    public File getDataFolder() {
+        return ViaRewind.getPlatform().getDataFolder();
+    }
 }

common/src/main/java/com/viaversion/viarewind/api/minecraft/ExtendedBlockStorage.java

@@ -1,77 +0,0 @@
-/*
- * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
- *
- * 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 <http://www.gnu.org/licenses/>.
- */
-package com.viaversion.viarewind.api.minecraft;
-
-import com.viaversion.viaversion.api.minecraft.chunks.ChunkSection;
-import com.viaversion.viaversion.api.minecraft.chunks.NibbleArray;
-
-public class ExtendedBlockStorage {
-	private final byte[] blockLSBArray = new byte[ChunkSection.SIZE];
-
-	private final NibbleArray blockMetadataArray = new NibbleArray(this.blockLSBArray.length);
-	private final NibbleArray blockLightArray = new NibbleArray(this.blockLSBArray.length);
-
-	private NibbleArray blockMSBArray;
-	private NibbleArray skyLightArray;
-
-	public ExtendedBlockStorage(final boolean skylight) {
-		if (skylight) {
-			this.skyLightArray = new NibbleArray(this.blockLSBArray.length);
-		}
-	}
-
-	public void setBlockId(final int x, final int y, final int z, final int value) {
-		this.blockLSBArray[ChunkSection.index(x, y, z)] = (byte) (value & 255);
-		if (value > 255) {
-			this.getOrCreateBlockMSBArray().set(x, y, z, (value & 0xF00) >> 8);
-		} else if (this.blockMSBArray != null) {
-			this.blockMSBArray.set(x, y, z, 0);
-		}
-	}
-
-	public void setBlockMetadata(final int x, final int y, final int z, final int value) {
-		this.blockMetadataArray.set(x, y, z, value);
-	}
-
-	public boolean hasBlockMSBArray() {
-		return this.blockMSBArray != null;
-	}
-
-	public byte[] getBlockLSBArray() {
-		return this.blockLSBArray;
-	}
-
-	public NibbleArray getOrCreateBlockMSBArray() {
-		if (this.blockMSBArray == null) {
-			return this.blockMSBArray = new NibbleArray(this.blockLSBArray.length);
-		}
-		return this.blockMSBArray;
-	}
-
-	public NibbleArray getBlockMetadataArray() {
-		return this.blockMetadataArray;
-	}
-
-	public NibbleArray getBlockLightArray() {
-		return this.blockLightArray;
-	}
-
-	public NibbleArray getSkyLightArray() {
-		return this.skyLightArray;
-	}
-}

common/src/main/java/com/viaversion/viarewind/api/minecraft/entitydata/EntityDataTypes1_7_6_10.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -23,33 +23,33 @@ import com.viaversion.viaversion.api.type.Type;
 import com.viaversion.viaversion.api.type.Types;
 
 public enum EntityDataTypes1_7_6_10 implements EntityDataType {
-	BYTE(0, Types.BYTE),
-	SHORT(1, Types.SHORT),
-	INT(2, Types.INT),
-	FLOAT(3, Types.FLOAT),
-	STRING(4, Types.STRING),
-	ITEM(5, RewindTypes.COMPRESSED_NBT_ITEM),
-	POSITION(6, Types.VECTOR);
+    BYTE(0, Types.BYTE),
+    SHORT(1, Types.SHORT),
+    INT(2, Types.INT),
+    FLOAT(3, Types.FLOAT),
+    STRING(4, Types.STRING),
+    ITEM(5, RewindTypes.COMPRESSED_NBT_ITEM),
+    POSITION(6, Types.VECTOR);
 
-	private final int typeID;
-	private final Type<?> type;
+    private final int typeID;
+    private final Type<?> type;
 
-	EntityDataTypes1_7_6_10(int typeID, Type<?> type) {
-		this.typeID = typeID;
-		this.type = type;
-	}
+    EntityDataTypes1_7_6_10(int typeID, Type<?> type) {
+        this.typeID = typeID;
+        this.type = type;
+    }
 
-	public static EntityDataTypes1_7_6_10 byId(int id) {
-		return values()[id];
-	}
+    public static EntityDataTypes1_7_6_10 byId(int id) {
+        return values()[id];
+    }
 
-	@Override
-	public int typeId() {
-		return this.typeID;
-	}
+    @Override
+    public int typeId() {
+        return this.typeID;
+    }
 
-	@Override
-	public Type<?> type() {
-		return this.type;
-	}
+    @Override
+    public Type<?> type() {
+        return this.type;
+    }
 }

common/src/main/java/com/viaversion/viarewind/api/minecraft/math/AABB.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -18,19 +18,19 @@
 package com.viaversion.viarewind.api.minecraft.math;
 
 public class AABB {
-	Vector3d min;
-	Vector3d max;
+    Vector3d min;
+    Vector3d max;
 
-	public AABB(Vector3d min, Vector3d max) {
-		this.min = min;
-		this.max = max;
-	}
+    public AABB(Vector3d min, Vector3d max) {
+        this.min = min;
+        this.max = max;
+    }
 
-	public Vector3d getMin() {
-		return this.min;
-	}
+    public Vector3d getMin() {
+        return this.min;
+    }
 
-	public Vector3d getMax() {
-		return this.max;
-	}
+    public Vector3d getMax() {
+        return this.max;
+    }
 }

common/src/main/java/com/viaversion/viarewind/api/minecraft/math/Ray3d.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -18,19 +18,19 @@
 package com.viaversion.viarewind.api.minecraft.math;
 
 public class Ray3d {
-	Vector3d start;
-	Vector3d dir;
+    Vector3d start;
+    Vector3d dir;
 
-	public Ray3d(Vector3d start, Vector3d dir) {
-		this.start = start;
-		this.dir = dir;
-	}
+    public Ray3d(Vector3d start, Vector3d dir) {
+        this.start = start;
+        this.dir = dir;
+    }
 
-	public Vector3d getStart() {
-		return this.start;
-	}
+    public Vector3d getStart() {
+        return this.start;
+    }
 
-	public Vector3d getDir() {
-		return this.dir;
-	}
+    public Vector3d getDir() {
+        return this.dir;
+    }
 }

common/src/main/java/com/viaversion/viarewind/api/minecraft/math/RayTracing.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -19,40 +19,40 @@ package com.viaversion.viarewind.api.minecraft.math;
 
 public class RayTracing {
 
-	public static Vector3d trace(Ray3d ray, AABB aabb, double distance) {
-		Vector3d invDir = new Vector3d(1f / ray.dir.x, 1f / ray.dir.y, 1f / ray.dir.z);
+    public static Vector3d trace(Ray3d ray, AABB aabb, double distance) {
+        Vector3d invDir = new Vector3d(1f / ray.dir.x, 1f / ray.dir.y, 1f / ray.dir.z);
 
-		boolean signDirX = invDir.x < 0;
-		boolean signDirY = invDir.y < 0;
-		boolean signDirZ = invDir.z < 0;
+        boolean signDirX = invDir.x < 0;
+        boolean signDirY = invDir.y < 0;
+        boolean signDirZ = invDir.z < 0;
 
-		Vector3d bbox = signDirX ? aabb.max : aabb.min;
-		double tmin = (bbox.x - ray.start.x) * invDir.x;
-		bbox = signDirX ? aabb.min : aabb.max;
-		double tmax = (bbox.x - ray.start.x) * invDir.x;
-		bbox = signDirY ? aabb.max : aabb.min;
-		double tymin = (bbox.y - ray.start.y) * invDir.y;
-		bbox = signDirY ? aabb.min : aabb.max;
-		double tymax = (bbox.y - ray.start.y) * invDir.y;
+        Vector3d bbox = signDirX ? aabb.max : aabb.min;
+        double tmin = (bbox.x - ray.start.x) * invDir.x;
+        bbox = signDirX ? aabb.min : aabb.max;
+        double tmax = (bbox.x - ray.start.x) * invDir.x;
+        bbox = signDirY ? aabb.max : aabb.min;
+        double tymin = (bbox.y - ray.start.y) * invDir.y;
+        bbox = signDirY ? aabb.min : aabb.max;
+        double tymax = (bbox.y - ray.start.y) * invDir.y;
 
-		if (tmin > tymax || tymin > tmax) return null;
+        if (tmin > tymax || tymin > tmax) return null;
 
-		if (tymin > tmin) tmin = tymin;
+        if (tymin > tmin) tmin = tymin;
 
-		if (tymax < tmax) tmax = tymax;
+        if (tymax < tmax) tmax = tymax;
 
-		bbox = signDirZ ? aabb.max : aabb.min;
-		double tzmin = (bbox.z - ray.start.z) * invDir.z;
-		bbox = signDirZ ? aabb.min : aabb.max;
-		double tzmax = (bbox.z - ray.start.z) * invDir.z;
+        bbox = signDirZ ? aabb.max : aabb.min;
+        double tzmin = (bbox.z - ray.start.z) * invDir.z;
+        bbox = signDirZ ? aabb.min : aabb.max;
+        double tzmax = (bbox.z - ray.start.z) * invDir.z;
 
-		if (tmin > tzmax || tzmin > tmax) return null;
+        if (tmin > tzmax || tzmin > tmax) return null;
 
-		if (tzmin > tmin) tmin = tzmin;
+        if (tzmin > tmin) tmin = tzmin;
 
-		if (tzmax < tmax) tmax = tzmax;
+        if (tzmax < tmax) tmax = tzmax;
 
-		return tmin <= distance && tmax > 0 ? ray.start.clone().add(ray.dir.clone().normalize().multiply(tmin)) : null;
-	}
+        return tmin <= distance && tmax > 0 ? ray.start.clone().add(ray.dir.clone().normalize().multiply(tmin)) : null;
+    }
 
 }

common/src/main/java/com/viaversion/viarewind/api/minecraft/math/RelativeMoveUtil.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -17,87 +17,83 @@
  */
 package com.viaversion.viarewind.api.minecraft.math;
 
-import com.viaversion.viarewind.protocol.v1_9to1_8.Protocol1_9To1_8;
 import com.viaversion.viarewind.protocol.v1_9to1_8.storage.EntityTracker1_9;
-import com.viaversion.viaversion.api.connection.UserConnection;
 import com.viaversion.viaversion.api.minecraft.Vector;
 
 @Deprecated // ?????????
 public class RelativeMoveUtil {
 
-	public static Vector[] calculateRelativeMoves(UserConnection user, int entityId, int relX, int relY, int relZ) {
-		EntityTracker1_9 tracker = user.getEntityTracker(Protocol1_9To1_8.class);
+    public static Vector[] calculateRelativeMoves(EntityTracker1_9 tracker, int entityId, int relX, int relY, int relZ) {
+        int x;
+        int y;
+        int z;
+        Vector offset = tracker.getEntityOffset(entityId);
+        if (offset != null) {
+            relX += offset.blockX();
+            relY += offset.blockY();
+            relZ += offset.blockZ();
+        }
 
-		int x;
-		int y;
-		int z;
-		Vector offset = tracker.getEntityOffset(entityId);
-		if (offset != null) {
-			relX += offset.blockX();
-			relY += offset.blockY();
-			relZ += offset.blockZ();
-		}
+        if (relX > Short.MAX_VALUE) {
+            x = relX - Short.MAX_VALUE;
+            relX = Short.MAX_VALUE;
+        } else if (relX < Short.MIN_VALUE) {
+            x = relX - Short.MIN_VALUE;
+            relX = Short.MIN_VALUE;
+        } else {
+            x = 0;
+        }
 
-		if (relX > Short.MAX_VALUE) {
-			x = relX - Short.MAX_VALUE;
-			relX = Short.MAX_VALUE;
-		} else if (relX < Short.MIN_VALUE) {
-			x = relX - Short.MIN_VALUE;
-			relX = Short.MIN_VALUE;
-		} else {
-			x = 0;
-		}
+        if (relY > Short.MAX_VALUE) {
+            y = relY - Short.MAX_VALUE;
+            relY = Short.MAX_VALUE;
+        } else if (relY < Short.MIN_VALUE) {
+            y = relY - Short.MIN_VALUE;
+            relY = Short.MIN_VALUE;
+        } else {
+            y = 0;
+        }
 
-		if (relY > Short.MAX_VALUE) {
-			y = relY - Short.MAX_VALUE;
-			relY = Short.MAX_VALUE;
-		} else if (relY < Short.MIN_VALUE) {
-			y = relY - Short.MIN_VALUE;
-			relY = Short.MIN_VALUE;
-		} else {
-			y = 0;
-		}
+        if (relZ > Short.MAX_VALUE) {
+            z = relZ - Short.MAX_VALUE;
+            relZ = Short.MAX_VALUE;
+        } else if (relZ < Short.MIN_VALUE) {
+            z = relZ - Short.MIN_VALUE;
+            relZ = Short.MIN_VALUE;
+        } else {
+            z = 0;
+        }
 
-		if (relZ > Short.MAX_VALUE) {
-			z = relZ - Short.MAX_VALUE;
-			relZ = Short.MAX_VALUE;
-		} else if (relZ < Short.MIN_VALUE) {
-			z = relZ - Short.MIN_VALUE;
-			relZ = Short.MIN_VALUE;
-		} else {
-			z = 0;
-		}
+        int sentRelX, sentRelY, sentRelZ;
+        Vector[] moves;
 
-		int sentRelX, sentRelY, sentRelZ;
-		Vector[] moves;
+        if (relX > Byte.MAX_VALUE * 128 || relX < Byte.MIN_VALUE * 128 || relY > Byte.MAX_VALUE * 128 || relY < Byte.MIN_VALUE * 128 || relZ > Byte.MAX_VALUE * 128 || relZ < Byte.MIN_VALUE * 128) {
+            byte relX1 = (byte) (relX / 256);
+            byte relX2 = (byte) (Math.round((relX - relX1 * 128) / 128f));
+            byte relY1 = (byte) (relY / 256);
+            byte relY2 = (byte) (Math.round((relY - relY1 * 128) / 128f));
+            byte relZ1 = (byte) (relZ / 256);
+            byte relZ2 = (byte) (Math.round((relZ - relZ1 * 128) / 128f));
 
-		if (relX > Byte.MAX_VALUE * 128 || relX < Byte.MIN_VALUE * 128 || relY > Byte.MAX_VALUE * 128 || relY < Byte.MIN_VALUE * 128 || relZ > Byte.MAX_VALUE * 128 || relZ < Byte.MIN_VALUE * 128) {
-			byte relX1 = (byte) (relX / 256);
-			byte relX2 = (byte) (Math.round((relX - relX1 * 128) / 128f));
-			byte relY1 = (byte) (relY / 256);
-			byte relY2 = (byte) (Math.round((relY - relY1 * 128) / 128f));
-			byte relZ1 = (byte) (relZ / 256);
-			byte relZ2 = (byte) (Math.round((relZ - relZ1 * 128) / 128f));
+            sentRelX = relX1 + relX2;
+            sentRelY = relY1 + relY2;
+            sentRelZ = relZ1 + relZ2;
 
-			sentRelX = relX1 + relX2;
-			sentRelY = relY1 + relY2;
-			sentRelZ = relZ1 + relZ2;
+            moves = new Vector[]{new Vector(relX1, relY1, relZ1), new Vector(relX2, relY2, relZ2)};
+        } else {
+            sentRelX = Math.round(relX / 128f);
+            sentRelY = Math.round(relY / 128f);
+            sentRelZ = Math.round(relZ / 128f);
 
-			moves = new Vector[]{new Vector(relX1, relY1, relZ1), new Vector(relX2, relY2, relZ2)};
-		} else {
-			sentRelX = Math.round(relX / 128f);
-			sentRelY = Math.round(relY / 128f);
-			sentRelZ = Math.round(relZ / 128f);
+            moves = new Vector[]{new Vector(sentRelX, sentRelY, sentRelZ)};
+        }
 
-			moves = new Vector[]{new Vector(sentRelX, sentRelY, sentRelZ)};
-		}
+        x = x + relX - sentRelX * 128;
+        y = y + relY - sentRelY * 128;
+        z = z + relZ - sentRelZ * 128;
 
-		x = x + relX - sentRelX * 128;
-		y = y + relY - sentRelY * 128;
-		z = z + relZ - sentRelZ * 128;
+        tracker.setEntityOffset(entityId, new Vector(x, y, z));
 
-		tracker.setEntityOffset(entityId, new Vector(x, y, z));
-
-		return moves;
-	}
+        return moves;
+    }
 }

common/src/main/java/com/viaversion/viarewind/api/minecraft/math/Vector3d.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -20,109 +20,109 @@ package com.viaversion.viarewind.api.minecraft.math;
 import java.util.Objects;
 
 public class Vector3d {
-	double x, y, z;
+    double x, y, z;
 
-	public Vector3d(double x, double y, double z) {
-		this.x = x;
-		this.y = y;
-		this.z = z;
-	}
+    public Vector3d(double x, double y, double z) {
+        this.x = x;
+        this.y = y;
+        this.z = z;
+    }
 
-	public Vector3d() {
-	}
+    public Vector3d() {
+    }
 
-	public void set(Vector3d vec) {
-		this.x = vec.x;
-		this.y = vec.y;
-		this.z = vec.z;
-	}
+    public void set(Vector3d vec) {
+        this.x = vec.x;
+        this.y = vec.y;
+        this.z = vec.z;
+    }
 
-	public Vector3d set(double x, double y, double z) {
-		this.x = x;
-		this.y = y;
-		this.z = z;
-		return this;
-	}
+    public Vector3d set(double x, double y, double z) {
+        this.x = x;
+        this.y = y;
+        this.z = z;
+        return this;
+    }
 
-	public Vector3d multiply(double a) {
-		this.x *= a;
-		this.y *= a;
-		this.z *= a;
-		return this;
-	}
+    public Vector3d multiply(double a) {
+        this.x *= a;
+        this.y *= a;
+        this.z *= a;
+        return this;
+    }
 
-	public Vector3d add(Vector3d vec) {
-		this.x += vec.x;
-		this.y += vec.y;
-		this.z += vec.z;
-		return this;
-	}
+    public Vector3d add(Vector3d vec) {
+        this.x += vec.x;
+        this.y += vec.y;
+        this.z += vec.z;
+        return this;
+    }
 
-	public Vector3d substract(Vector3d vec) {
-		this.x -= vec.x;
-		this.y -= vec.y;
-		this.z -= vec.z;
-		return this;
-	}
+    public Vector3d substract(Vector3d vec) {
+        this.x -= vec.x;
+        this.y -= vec.y;
+        this.z -= vec.z;
+        return this;
+    }
 
-	public double length() {
-		return Math.sqrt(lengthSquared());
-	}
+    public double length() {
+        return Math.sqrt(lengthSquared());
+    }
 
-	public double lengthSquared() {
-		return this.x * this.x + this.y * this.y + this.z * this.z;
-	}
+    public double lengthSquared() {
+        return this.x * this.x + this.y * this.y + this.z * this.z;
+    }
 
-	public Vector3d normalize() {
-		double length = length();
-		multiply(1.0 / length);
-		return this;
-	}
+    public Vector3d normalize() {
+        double length = length();
+        multiply(1.0 / length);
+        return this;
+    }
 
-	@Override
-	public Vector3d clone() {
-		return new Vector3d(this.x, this.y, this.z);
-	}
+    @Override
+    public Vector3d clone() {
+        return new Vector3d(this.x, this.y, this.z);
+    }
 
-	@Override
-	public boolean equals(Object o) {
-		if (this == o) return true;
-		if (o == null || getClass() != o.getClass()) return false;
-		Vector3d vector3d = (Vector3d) o;
-		return Double.compare(vector3d.x, x) == 0 && Double.compare(vector3d.y, y) == 0 && Double.compare(vector3d.z, z) == 0;
-	}
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        Vector3d vector3d = (Vector3d) o;
+        return Double.compare(vector3d.x, x) == 0 && Double.compare(vector3d.y, y) == 0 && Double.compare(vector3d.z, z) == 0;
+    }
 
-	@Override
-	public int hashCode() {
-		return Objects.hash(x, y, z);
-	}
+    @Override
+    public int hashCode() {
+        return Objects.hash(x, y, z);
+    }
 
-	@Override
-	public String toString() {
-		return "Vector3d{" + "x=" + x + ", y=" + y + ", z=" + z + '}';
-	}
+    @Override
+    public String toString() {
+        return "Vector3d{" + "x=" + x + ", y=" + y + ", z=" + z + '}';
+    }
 
-	public double getX() {
-		return this.x;
-	}
+    public double getX() {
+        return this.x;
+    }
 
-	public double getY() {
-		return this.y;
-	}
+    public void setX(double x) {
+        this.x = x;
+    }
 
-	public double getZ() {
-		return this.z;
-	}
+    public double getY() {
+        return this.y;
+    }
 
-	public void setX(double x) {
-		this.x = x;
-	}
+    public void setY(double y) {
+        this.y = y;
+    }
 
-	public void setY(double y) {
-		this.y = y;
-	}
+    public double getZ() {
+        return this.z;
+    }
 
-	public void setZ(double z) {
-		this.z = z;
-	}
+    public void setZ(double z) {
+        this.z = z;
+    }
 }

common/src/main/java/com/viaversion/viarewind/api/minecraft/netty/EmptyChannelHandler.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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

common/src/main/java/com/viaversion/viarewind/api/minecraft/netty/ForwardMessageToByteEncoder.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -23,8 +23,8 @@ import io.netty.handler.codec.MessageToByteEncoder;
 
 public class ForwardMessageToByteEncoder extends MessageToByteEncoder<ByteBuf> {
 
-	@Override
-	protected void encode(ChannelHandlerContext ctx, ByteBuf msg, ByteBuf out) {
-		out.writeBytes(msg);
-	}
+    @Override
+    protected void encode(ChannelHandlerContext ctx, ByteBuf msg, ByteBuf out) {
+        out.writeBytes(msg);
+    }
 }

common/src/main/java/com/viaversion/viarewind/api/rewriter/VRBlockItemRewriter.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -26,17 +26,17 @@ import com.viaversion.viaversion.libs.gson.JsonObject;
 
 public class VRBlockItemRewriter<C extends ClientboundPacketType, S extends ServerboundPacketType, T extends BackwardsProtocol<C, ?, ?, S>> extends LegacyBlockItemRewriter<C, S, T> {
 
-	protected VRBlockItemRewriter(T protocol, String name) {
-		super(protocol, name);
-	}
+    protected VRBlockItemRewriter(T protocol, String name) {
+        super(protocol, name);
+    }
 
-	@Override
-	protected JsonObject readMappingsFile(String name) {
-		return RewindMappingDataLoader.INSTANCE.loadFromDataDir(name);
-	}
+    @Override
+    protected JsonObject readMappingsFile(String name) {
+        return RewindMappingDataLoader.INSTANCE.loadFromDataDir(name);
+    }
 
-	@Override
-	public String nbtTagName() {
-		return "VR|" + protocol.getClass().getSimpleName();
-	}
+    @Override
+    public String nbtTagName() {
+        return "VR|" + protocol.getClass().getSimpleName();
+    }
 }

common/src/main/java/com/viaversion/viarewind/api/rewriter/VREntityRewriter.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -31,36 +31,36 @@ import com.viaversion.viaversion.data.entity.EntityTrackerBase;
 
 public abstract class VREntityRewriter<C extends ClientboundPacketType, T extends BackwardsProtocol<C, ?, ?, ?>> extends LegacyEntityRewriter<C, T> {
 
-	public VREntityRewriter(T protocol) {
-		super(protocol, EntityDataTypes1_8.STRING, EntityDataTypes1_8.BYTE);
-	}
+    public VREntityRewriter(T protocol) {
+        super(protocol, EntityDataTypes1_8.STRING, EntityDataTypes1_8.BYTE);
+    }
 
-	public VREntityRewriter(T protocol, EntityDataType displayType, EntityDataType displayVisibilityType) {
-		super(protocol, displayType, displayVisibilityType);
-	}
+    public VREntityRewriter(T protocol, EntityDataType displayType, EntityDataType displayVisibilityType) {
+        super(protocol, displayType, displayVisibilityType);
+    }
 
-	protected void removeEntities(final UserConnection connection, final int[] entities) {
-		final EntityTrackerBase tracker = tracker(connection);
-		for (int entityId : entities) {
-			tracker.removeEntity(entityId);
-		}
-	}
+    protected void removeEntities(final UserConnection connection, final int[] entities) {
+        final EntityTrackerBase tracker = tracker(connection);
+        for (int entityId : entities) {
+            tracker.removeEntity(entityId);
+        }
+    }
 
-	protected PacketHandler getDimensionHandler() {
-		return wrapper -> {
-			final int dimension = wrapper.get(Types.BYTE, 0);
-			final ClientWorld clientWorld = wrapper.user().getClientWorld(protocol.getClass());
-			clientWorld.setEnvironment(dimension);
-		};
-	}
+    protected PacketHandler getDimensionHandler() {
+        return wrapper -> {
+            final int dimension = wrapper.get(Types.BYTE, 0);
+            final ClientWorld clientWorld = wrapper.user().getClientWorld(protocol.getClass());
+            clientWorld.setEnvironment(dimension);
+        };
+    }
 
-	@Override
-	protected Object getDisplayVisibilityDataValue() {
-		return (byte) 1;
-	}
+    @Override
+    protected Object getDisplayVisibilityDataValue() {
+        return (byte) 1;
+    }
 
-	@Override
-	protected boolean alwaysShowOriginalMobName() {
-		return ViaRewind.getConfig().alwaysShowOriginalMobName();
-	}
+    @Override
+    protected boolean alwaysShowOriginalMobName() {
+        return ViaRewind.getConfig().alwaysShowOriginalMobName();
+    }
 }

common/src/main/java/com/viaversion/viarewind/api/type/IntArrayType.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -22,23 +22,23 @@ import io.netty.buffer.ByteBuf;
 
 public class IntArrayType extends Type<int[]> {
 
-	public IntArrayType() {
-		super(int[].class);
-	}
+    public IntArrayType() {
+        super(int[].class);
+    }
 
-	@Override
-	public int[] read(ByteBuf byteBuf) {
-		byte size = byteBuf.readByte();
-		int[] array = new int[size];
-		for (byte i = 0; i < size; i++) {
-			array[i] = byteBuf.readInt();
-		}
-		return array;
-	}
+    @Override
+    public int[] read(ByteBuf byteBuf) {
+        byte size = byteBuf.readByte();
+        int[] array = new int[size];
+        for (byte i = 0; i < size; i++) {
+            array[i] = byteBuf.readInt();
+        }
+        return array;
+    }
 
-	@Override
-	public void write(ByteBuf byteBuf, int[] array) {
-		byteBuf.writeByte(array.length);
-		for (int i : array) byteBuf.writeInt(i);
-	}
+    @Override
+    public void write(ByteBuf byteBuf, int[] array) {
+        byteBuf.writeByte(array.length);
+        for (int i : array) byteBuf.writeInt(i);
+    }
 }

common/src/main/java/com/viaversion/viarewind/api/type/PositionVarYType.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -20,34 +20,33 @@ package com.viaversion.viarewind.api.type;
 import com.viaversion.viaversion.api.minecraft.BlockPosition;
 import com.viaversion.viaversion.api.type.Type;
 import io.netty.buffer.ByteBuf;
-
 import java.util.function.IntFunction;
 
 public class PositionVarYType<T extends Number> extends Type<BlockPosition> {
 
-	private final Type<T> yType;
-	private final IntFunction<T> toY;
+    private final Type<T> yType;
+    private final IntFunction<T> toY;
 
-	public PositionVarYType(final Type<T> yType, final IntFunction<T> toY) {
-		super(BlockPosition.class);
+    public PositionVarYType(final Type<T> yType, final IntFunction<T> toY) {
+        super(BlockPosition.class);
 
-		this.yType = yType;
-		this.toY = toY;
-	}
+        this.yType = yType;
+        this.toY = toY;
+    }
 
-	@Override
-	public BlockPosition read(ByteBuf buffer) {
-		final int x = buffer.readInt();
-		final int y = yType.read(buffer).intValue();
-		final int z = buffer.readInt();
+    @Override
+    public BlockPosition read(ByteBuf buffer) {
+        final int x = buffer.readInt();
+        final int y = yType.read(buffer).intValue();
+        final int z = buffer.readInt();
 
-		return new BlockPosition(x, y, z);
-	}
+        return new BlockPosition(x, y, z);
+    }
 
-	@Override
-	public void write(ByteBuf buffer, BlockPosition value) {
-		buffer.writeInt(value.x());
-		yType.write(buffer, this.toY.apply(value.y()));
-		buffer.writeInt(value.z());
-	}
+    @Override
+    public void write(ByteBuf buffer, BlockPosition value) {
+        buffer.writeInt(value.x());
+        yType.write(buffer, this.toY.apply(value.y()));
+        buffer.writeInt(value.z());
+    }
 }

common/src/main/java/com/viaversion/viarewind/api/type/RewindTypes.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -17,18 +17,17 @@
  */
 package com.viaversion.viarewind.api.type;
 
-import com.viaversion.viarewind.api.type.item.NBTType;
-import com.viaversion.viarewind.api.type.item.ItemArrayType;
-import com.viaversion.viarewind.api.type.item.ItemType;
+import com.viaversion.nbt.tag.CompoundTag;
 import com.viaversion.viarewind.api.type.entitydata.EntityDataListType;
 import com.viaversion.viarewind.api.type.entitydata.EntityDataType;
+import com.viaversion.viarewind.api.type.item.ItemArrayType;
+import com.viaversion.viarewind.api.type.item.ItemType;
+import com.viaversion.viarewind.api.type.item.NBTType;
 import com.viaversion.viaversion.api.minecraft.BlockPosition;
-import com.viaversion.viaversion.api.minecraft.item.Item;
 import com.viaversion.viaversion.api.minecraft.entitydata.EntityData;
+import com.viaversion.viaversion.api.minecraft.item.Item;
 import com.viaversion.viaversion.api.type.Type;
 import com.viaversion.viaversion.api.type.Types;
-import com.viaversion.nbt.tag.CompoundTag;
-
 import java.util.List;
 
 /**
@@ -36,16 +35,16 @@ import java.util.List;
  */
 public class RewindTypes {
 
-	public static final Type<int[]> INT_ARRAY = new IntArrayType(); // Integer array with byte as length indicator
+    public static final Type<int[]> INT_ARRAY = new IntArrayType(); // Integer array with byte as length indicator
 
-	public static final Type<BlockPosition> SHORT_POSITION = new PositionVarYType<>(Types.SHORT, value -> (short) value);
-	public static final Type<BlockPosition> INT_POSITION = new PositionVarYType<>(Types.INT, value -> value);
-	public static final Type<BlockPosition> BYTE_POSITION = new PositionVarYType<>(Types.BYTE, value -> (byte) value);
-	public static final Type<BlockPosition> U_BYTE_POSITION = new PositionVarYType<>(Types.UNSIGNED_BYTE, value -> (short) value);
+    public static final Type<BlockPosition> SHORT_POSITION = new PositionVarYType<>(Types.SHORT, value -> (short) value);
+    public static final Type<BlockPosition> INT_POSITION = new PositionVarYType<>(Types.INT, value -> value);
+    public static final Type<BlockPosition> BYTE_POSITION = new PositionVarYType<>(Types.BYTE, value -> (byte) value);
+    public static final Type<BlockPosition> U_BYTE_POSITION = new PositionVarYType<>(Types.UNSIGNED_BYTE, value -> (short) value);
 
-	public static final Type<CompoundTag> COMPRESSED_NBT = new NBTType();
-	public static final Type<Item> COMPRESSED_NBT_ITEM = new ItemType();
-	public static final Type<Item[]> COMPRESSED_NBT_ITEM_ARRAY = new ItemArrayType();
+    public static final Type<CompoundTag> COMPRESSED_NBT = new NBTType();
+    public static final Type<Item> COMPRESSED_NBT_ITEM = new ItemType();
+    public static final Type<Item[]> COMPRESSED_NBT_ITEM_ARRAY = new ItemArrayType();
 
     public static final Type<EntityData> ENTITY_DATA1_7 = new EntityDataType();
     public static final Type<List<EntityData>> ENTITY_DATA_LIST1_7 = new EntityDataListType(ENTITY_DATA1_7);

common/src/main/java/com/viaversion/viarewind/api/type/chunk/BulkChunkType1_7_6.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -17,95 +17,102 @@
  */
 package com.viaversion.viarewind.api.type.chunk;
 
+import com.viaversion.viarewind.api.compression.ThreadLocalCompressionProvider;
 import com.viaversion.viaversion.api.minecraft.chunks.Chunk;
-import com.viaversion.viaversion.api.minecraft.chunks.ChunkSection;
 import com.viaversion.viaversion.api.type.Type;
-import com.viaversion.viaversion.util.Pair;
 import io.netty.buffer.ByteBuf;
 
-import java.util.zip.Deflater;
+import java.util.zip.DataFormatException;
+
 
 public class BulkChunkType1_7_6 extends Type<Chunk[]> {
 
-	public static final BulkChunkType1_7_6 TYPE = new BulkChunkType1_7_6();
+    public static final BulkChunkType1_7_6 TYPE = new BulkChunkType1_7_6();
 
-	public BulkChunkType1_7_6() {
-		super(Chunk[].class);
-	}
+    public BulkChunkType1_7_6() {
+        super(Chunk[].class);
+    }
 
-	@Override
-	public Chunk[] read(ByteBuf byteBuf) {
-		throw new UnsupportedOperationException(); // Not needed, see https://github.com/ViaVersion/ViaLegacy/blob/main/src/main/java/net/raphimc/vialegacy/protocols/release/protocol1_8to1_7_6_10/types/ChunkBulk1_7_6Type.java
-	}
+    @Override
+    public Chunk[] read(ByteBuf byteBuf) {
+        throw new UnsupportedOperationException(); // Not needed, see https://github.com/ViaVersion/ViaLegacy/blob/main/src/main/java/net/raphimc/vialegacy/protocols/release/protocol1_8to1_7_6_10/types/ChunkBulk1_7_6Type.java
+    }
 
-	@Override
-	public void write(ByteBuf byteBuf, Chunk[] chunks) {
-		final int chunkCount = chunks.length;
-		final int[] chunkX = new int[chunkCount];
-		final int[] chunkZ = new int[chunkCount];
-		final short[] primaryBitMask = new short[chunkCount];
-		final short[] additionalBitMask = new short[chunkCount];
+    @Override
+    public void write(ByteBuf buffer, Chunk[] chunks) {
+        final int chunkCount = chunks.length;
+        final int[] addBitMasks = new int[chunkCount];
+        int totalSize = 0;
+        boolean anySkyLight = false;
 
-        final byte[][] dataArrays = new byte[chunkCount][];
-        int dataSize = 0;
-
-		for (int i = 0; i < chunkCount; i++) {
-			final Chunk chunk = chunks[i];
-			Pair<byte[], Short> chunkData;
-			try {
-				chunkData = ChunkType1_7_6.serialize(chunk);
-                final byte[] data = chunkData.key();
-                dataArrays[i] = data;
-                dataSize += data.length;
-			} catch (Exception e) {
-				throw new RuntimeException("Unable to serialize chunk", e);
-			}
-			chunkX[i] = chunk.getX();
-			chunkZ[i] = chunk.getZ();
-			primaryBitMask[i] = (short) chunk.getBitmask();
-			additionalBitMask[i] = chunkData.value();
-		}
-
-        final byte[] data = new byte[dataSize];
-        int destPos = 0;
-        for (final byte[] array : dataArrays) {
-            System.arraycopy(array, 0, data, destPos, array.length);
-            destPos += array.length;
+        for (Chunk chunk : chunks) {
+            if (ChunkType1_7_6.hasSkyLight(chunk)) {
+                anySkyLight = true;
+                break;
+            }
         }
 
-		final Deflater deflater = new Deflater();
-		byte[] compressedData;
-		int compressedSize;
-		try {
-			deflater.setInput(data, 0, data.length);
-			deflater.finish();
-			compressedData = new byte[data.length];
-			compressedSize = deflater.deflate(compressedData);
-		} finally {
-			deflater.end();
-		}
+        for (int i = 0; i < chunkCount; i++) {
+            Chunk chunk = chunks[i];
+            addBitMasks[i] = ChunkType1_7_6.getAddBitMask(chunk);
+            boolean biomes = chunk.isFullChunk() && chunk.getBiomeData() != null;
 
-		byteBuf.writeShort(chunkCount);
-		byteBuf.writeInt(compressedSize);
+            totalSize += ChunkType1_7_6.calcSize(
+                chunk.getBitmask(),
+                addBitMasks[i],
+                anySkyLight,
+                biomes
+            );
+        }
 
-		boolean skyLight = false;
-		for (Chunk chunk : chunks) {
-			for (ChunkSection section : chunk.getSections()) {
-				if (section != null && section.getLight().hasSkyLight()) {
-					skyLight = true;
-					break;
-				}
-			}
-		}
+        final ByteBuf uncompressed = buffer.alloc().buffer(totalSize);
 
-		byteBuf.writeBoolean(skyLight); // hasSkyLight
-		byteBuf.writeBytes(compressedData, 0, compressedSize);
+        try {
+            for (int i = 0; i < chunkCount; i++) {
+                Chunk chunk = chunks[i];
+                boolean biomes = chunk.isFullChunk() && chunk.getBiomeData() != null;
 
-		for (int i = 0; i < chunkCount; i++) {
-			byteBuf.writeInt(chunkX[i]);
-			byteBuf.writeInt(chunkZ[i]);
-			byteBuf.writeShort(primaryBitMask[i]);
-			byteBuf.writeShort(additionalBitMask[i]);
-		}
-	}
+                ChunkType1_7_6.serialize(
+                    chunk,
+                    uncompressed,
+                    addBitMasks[i],
+                    anySkyLight,
+                    biomes
+                );
+            }
+
+            buffer.writeShort(chunkCount);
+
+            // Reserve 4 bytes for the compressed size
+            final int sizeIndex = buffer.writerIndex();
+            buffer.writeInt(0); // Placeholder for compressed size
+
+            buffer.writeBoolean(anySkyLight);
+
+            // Write compressed data directly to output buffer
+            final int compressedStart = buffer.writerIndex();
+            try {
+                ThreadLocalCompressionProvider.deflate(uncompressed, buffer);
+            } catch (DataFormatException e) {
+                throw new RuntimeException("Failed to compress bulk chunk data", e);
+            }
+            final int compressedSize = buffer.writerIndex() - compressedStart;
+
+            // Go back and write the compressed size
+            final int endIndex = buffer.writerIndex();
+            buffer.writerIndex(sizeIndex);
+            buffer.writeInt(compressedSize);
+            buffer.writerIndex(endIndex);
+        } finally {
+            uncompressed.release();
+        }
+
+        for (int i = 0; i < chunkCount; i++) {
+            Chunk chunk = chunks[i];
+            buffer.writeInt(chunk.getX());
+            buffer.writeInt(chunk.getZ());
+            buffer.writeShort(chunk.getBitmask());
+            buffer.writeShort(addBitMasks[i]);
+        }
+    }
 }

common/src/main/java/com/viaversion/viarewind/api/type/chunk/ChunkType1_7_6.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -17,163 +17,191 @@
  */
 package com.viaversion.viarewind.api.type.chunk;
 
-import com.viaversion.viarewind.api.minecraft.ExtendedBlockStorage;
-import com.viaversion.viaversion.api.minecraft.chunks.*;
+import com.viaversion.viarewind.api.compression.ThreadLocalCompressionProvider;
+import com.viaversion.viaversion.api.minecraft.chunks.Chunk;
+import com.viaversion.viaversion.api.minecraft.chunks.ChunkSection;
+import com.viaversion.viaversion.api.minecraft.chunks.DataPalette;
+import com.viaversion.viaversion.api.minecraft.chunks.PaletteType;
 import com.viaversion.viaversion.api.type.Type;
-import com.viaversion.viaversion.util.Pair;
 import io.netty.buffer.ByteBuf;
 
-import java.io.IOException;
-import java.util.zip.Deflater;
+import java.util.zip.DataFormatException;
 
 import static com.viaversion.viaversion.api.minecraft.chunks.ChunkSection.SIZE;
 import static com.viaversion.viaversion.api.minecraft.chunks.ChunkSectionLight.LIGHT_LENGTH;
 
 public class ChunkType1_7_6 extends Type<Chunk> {
 
-	public static final ChunkType1_7_6 TYPE = new ChunkType1_7_6();
+    public static final ChunkType1_7_6 TYPE = new ChunkType1_7_6();
 
-	public ChunkType1_7_6() {
-		super(Chunk.class);
-	}
+    public ChunkType1_7_6() {
+        super(Chunk.class);
+    }
 
-	@Override
-	public Chunk read(ByteBuf byteBuf) {
-		throw new UnsupportedOperationException(); // Not needed, see https://github.com/ViaVersion/ViaLegacy/blob/main/src/main/java/net/raphimc/vialegacy/protocols/release/protocol1_8to1_7_6_10/types/Chunk1_7_6Type.java
-	}
-
-	@Override
-	public void write(ByteBuf output, Chunk chunk) {
-		Pair<byte[], Short> chunkData;
-		try {
-			chunkData = serialize(chunk);
-		} catch (IOException e) {
-			throw new RuntimeException("Unable to serialize chunk", e);
-		}
-		final byte[] data = chunkData.key();
-		final short additionalBitMask = chunkData.value();
-
-		final Deflater deflater = new Deflater();
-		byte[] compressedData;
-		int compressedSize;
-		try {
-			deflater.setInput(data, 0, data.length);
-			deflater.finish();
-			compressedData = new byte[data.length];
-			compressedSize = deflater.deflate(compressedData);
-		} finally {
-			deflater.end();
-		}
-
-		output.writeInt(chunk.getX());
-		output.writeInt(chunk.getZ());
-		output.writeBoolean(chunk.isFullChunk());
-		output.writeShort(chunk.getBitmask());
-		output.writeShort(additionalBitMask);
-		output.writeInt(compressedSize);
-		output.writeBytes(compressedData, 0, compressedSize);
-	}
-
-	public static Pair<byte[], Short> serialize(final Chunk chunk) throws IOException {
-		final ExtendedBlockStorage[] storageArrays = new ExtendedBlockStorage[16];
-		for (int i = 0; i < storageArrays.length; i++) {
-			final ChunkSection section = chunk.getSections()[i];
-			if (section != null) {
-				final ExtendedBlockStorage storage = storageArrays[i] = new ExtendedBlockStorage(section.getLight().hasSkyLight());
-				for (int x = 0; x < 16; x++) {
-					for (int z = 0; z < 16; z++) {
-						for (int y = 0; y < 16; y++) {
-							final int flatBlock = section.palette(PaletteType.BLOCKS).idAt(x, y, z);
-							storage.setBlockId(x, y, z, flatBlock >> 4);
-							storage.setBlockMetadata(x, y, z, flatBlock & 15);
-						}
-					}
-				}
-				storage.getBlockLightArray().setHandle(section.getLight().getBlockLight());
-				if (section.getLight().hasSkyLight()) {
-					storage.getSkyLightArray().setHandle(section.getLight().getSkyLight());
-				}
-			}
-		}
+    @Override
+    public Chunk read(ByteBuf byteBuf) {
+        throw new UnsupportedOperationException(); // Not needed, see https://github.com/ViaVersion/ViaLegacy/blob/main/src/main/java/net/raphimc/vialegacy/protocols/release/protocol1_8to1_7_6_10/types/Chunk1_7_6Type.java
+    }
 
+    @Override
+    public void write(ByteBuf buffer, Chunk chunk) {
+        final int bitmask = chunk.getBitmask();
+        final int addBitmask = getAddBitMask(chunk);
+        final boolean hasSkyLight = hasSkyLight(chunk);
         final boolean biomes = chunk.isFullChunk() && chunk.getBiomeData() != null;
-        final int totalSize = calculateSize(storageArrays, chunk.getBitmask(), biomes);
 
-		final byte[] output = new byte[totalSize];
-        int index = 0;
+        final int size = calcSize(bitmask, addBitmask, hasSkyLight, biomes);
+        final ByteBuf uncompressed = buffer.alloc().buffer(size);
 
-		for (int i = 0; i < storageArrays.length; i++) {
-			if ((chunk.getBitmask() & 1 << i) != 0) {
-                final byte[] blockLSBArray = storageArrays[i].getBlockLSBArray();
-                System.arraycopy(blockLSBArray, 0, output, index, blockLSBArray.length);
-                index += blockLSBArray.length;
-			}
-		}
+        try {
+            serialize(chunk, uncompressed, addBitmask, hasSkyLight, biomes);
 
-		for (int i = 0; i < storageArrays.length; i++) {
-			if ((chunk.getBitmask() & 1 << i) != 0) {
-                final byte[] blockMetadataArray = storageArrays[i].getBlockMetadataArray().getHandle();
-                System.arraycopy(blockMetadataArray, 0, output, index, blockMetadataArray.length);
-                index += blockMetadataArray.length;
-			}
-		}
+            buffer.writeInt(chunk.getX());
+            buffer.writeInt(chunk.getZ());
+            buffer.writeBoolean(chunk.isFullChunk());
+            buffer.writeShort(bitmask);
+            buffer.writeShort(addBitmask);
 
-		for (int i = 0; i < storageArrays.length; i++) {
-			if ((chunk.getBitmask() & 1 << i) != 0) {
-                final byte[] blockLightArray = storageArrays[i].getBlockLightArray().getHandle();
-                System.arraycopy(blockLightArray, 0, output, index, blockLightArray.length);
-                index += blockLightArray.length;
-			}
-		}
+            // Reserve 4 bytes for the compressed size
+            final int sizeIndex = buffer.writerIndex();
+            buffer.writeInt(0); // Placeholder for compressed size
 
-		for (int i = 0; i < storageArrays.length; i++) {
-			if ((chunk.getBitmask() & 1 << i) != 0 && storageArrays[i].getSkyLightArray() != null) {
-                final byte[] skyLightArray = storageArrays[i].getSkyLightArray().getHandle();
-                System.arraycopy(skyLightArray, 0, output, index, skyLightArray.length);
-                index += skyLightArray.length;
-			}
-		}
+            // Write compressed data directly to output buffer
+            final int compressedStart = buffer.writerIndex();
+            try {
+                ThreadLocalCompressionProvider.deflate(uncompressed, buffer);
+            } catch (DataFormatException e) {
+                throw new RuntimeException("Failed to compress chunk data", e);
+            }
+            final int compressedSize = buffer.writerIndex() - compressedStart;
 
-		short additionalBitMask = 0;
-		for (int i = 0; i < storageArrays.length; i++) {
-			if ((chunk.getBitmask() & 1 << i) != 0 && storageArrays[i].hasBlockMSBArray()) {
-				additionalBitMask |= (short) (1 << i);
-                final byte[] blockMSBArray = storageArrays[i].getOrCreateBlockMSBArray().getHandle();
-                System.arraycopy(blockMSBArray, 0, output, index, blockMSBArray.length);
-                index += blockMSBArray.length;
-			}
-		}
+            // Go back and write the compressed size
+            final int endIndex = buffer.writerIndex();
+            buffer.writerIndex(sizeIndex);
+            buffer.writeInt(compressedSize);
+            buffer.writerIndex(endIndex);
+        } finally {
+            uncompressed.release();
+        }
+    }
 
-		if (biomes) {
-			for (int biome : chunk.getBiomeData()) {
-				output[index++] = (byte) biome;
-			}
-		}
+    public static void serialize(Chunk chunk, ByteBuf output, int addBitmask, boolean writeSkyLight, boolean biomes) {
+        final ChunkSection[] sections = chunk.getSections();
+        final int bitmask = chunk.getBitmask();
 
-		return new Pair<>(output, additionalBitMask);
-	}
-
-    private static int calculateSize(final ExtendedBlockStorage[] storageArrays, final int bitmask, final boolean biomes) {
-        int totalSize = 0;
-        for (int i = 0; i < storageArrays.length; i++) {
-            if ((bitmask & 1 << i) != 0) {
-                totalSize += SIZE; // Block lsb array
-                totalSize += SIZE / 2; // Block metadata array
-                totalSize += LIGHT_LENGTH; // Block light array
-
-                if (storageArrays[i].getSkyLightArray() != null) {
-                    totalSize += LIGHT_LENGTH;
-                }
-
-                if (storageArrays[i].hasBlockMSBArray()) {
-                    totalSize += SIZE / 2; // Block msb array
+        for (int i = 0; i < 16; i++) {
+            if ((bitmask & (1 << i)) != 0) {
+                final ChunkSection section = sections[i];
+                final DataPalette palette = section.palette(PaletteType.BLOCKS);
+                for (int j = 0; j < SIZE; j++) {
+                    final int block = palette.idAt(j);
+                    output.writeByte((block >> 4) & 0xFF);
                 }
             }
         }
-        if (biomes) {
-            totalSize += 256;
+
+        for (int i = 0; i < 16; i++) {
+            if ((bitmask & (1 << i)) != 0) {
+                final ChunkSection section = sections[i];
+                final DataPalette palette = section.palette(PaletteType.BLOCKS);
+                for (int j = 0; j < ChunkSection.SIZE; j += 2) {
+                    final int meta1 = palette.idAt(j) & 0xF;
+                    final int meta2 = palette.idAt(j + 1) & 0xF;
+                    output.writeByte(meta1 | (meta2 << 4));
+                }
+            }
+        }
+
+        for (int i = 0; i < 16; i++) {
+            if ((bitmask & (1 << i)) != 0) {
+                final byte[] blockLight = sections[i].getLight().getBlockLight();
+                output.writeBytes(blockLight);
+            }
+        }
+
+        if (writeSkyLight) {
+            for (int i = 0; i < 16; i++) {
+                if ((bitmask & (1 << i)) != 0) {
+                    if (sections[i].getLight().hasSkyLight()) {
+                        final byte[] skyLight = sections[i].getLight().getSkyLight();
+                        output.writeBytes(skyLight);
+                    } else {
+                        // Write empty skylight data
+                        output.writeZero(LIGHT_LENGTH);
+                    }
+                }
+            }
+        }
+
+        if (addBitmask != 0) {
+            for (int i = 0; i < 16; i++) {
+                if ((bitmask & (1 << i)) != 0 && (addBitmask & (1 << i)) != 0) {
+                    final ChunkSection section = sections[i];
+                    final DataPalette palette = section.palette(PaletteType.BLOCKS);
+                    for (int j = 0; j < SIZE; j += 2) {
+                        final int add1 = (palette.idAt(j) >> 12) & 0xF;
+                        final int add2 = (palette.idAt(j + 1) >> 12) & 0xF;
+                        output.writeByte(add1 | (add2 << 4));
+                    }
+                }
+            }
+        }
+
+        if (biomes && chunk.getBiomeData() != null) {
+            final int[] biomeData = chunk.getBiomeData();
+            for (int biome : biomeData) {
+                output.writeByte(biome);
+            }
         }
-        return totalSize;
     }
 
+    public static int calcSize(int bitmask, int addBitmask, boolean hasSkyLight, boolean biomes) {
+        int size = 0;
+        int sections = Integer.bitCount(bitmask);
+
+        size += sections * SIZE;
+        size += sections * (SIZE / 2);
+        size += sections * LIGHT_LENGTH;
+
+        if (hasSkyLight) {
+            size += sections * LIGHT_LENGTH;
+        }
+
+        if (addBitmask != 0) {
+            size += Integer.bitCount(addBitmask) * (SIZE / 2);
+        }
+
+        if (biomes) {
+            size += 256;
+        }
+
+        return size;
+    }
+
+    public static int getAddBitMask(Chunk chunk) {
+        int addBitMask = 0;
+        for (int i = 0; i < 16; i++) {
+            if ((chunk.getBitmask() & (1 << i)) != 0) {
+                final ChunkSection section = chunk.getSections()[i];
+                final DataPalette palette = section.palette(PaletteType.BLOCKS);
+                for (int j = 0; j < SIZE; j++) {
+                    final int id = palette.idAt(j);
+                    if ((id >> 12) != 0) {
+                        addBitMask |= (1 << i);
+                        break;
+                    }
+                }
+            }
+        }
+        return addBitMask;
+    }
+
+    public static boolean hasSkyLight(Chunk chunk) {
+        for (ChunkSection section : chunk.getSections()) {
+            if (section != null && section.getLight().hasSkyLight()) {
+                return true;
+            }
+        }
+        return false;
+    }
 }

common/src/main/java/com/viaversion/viarewind/api/type/entitydata/EntityDataListType.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -22,41 +22,40 @@ import com.viaversion.viaversion.api.minecraft.entitydata.EntityData;
 import com.viaversion.viaversion.api.type.Type;
 import com.viaversion.viaversion.api.type.types.entitydata.EntityDataListTypeTemplate;
 import io.netty.buffer.ByteBuf;
-
 import java.util.ArrayList;
 import java.util.List;
 
 public class EntityDataListType extends EntityDataListTypeTemplate {
 
-	private final Type<EntityData> type;
+    private final Type<EntityData> type;
 
-	public EntityDataListType(Type<EntityData> type) {
-		this.type = type;
-	}
+    public EntityDataListType(Type<EntityData> type) {
+        this.type = type;
+    }
 
-	@Override
-	public List<EntityData> read(ByteBuf buffer) {
-		ArrayList<EntityData> entityData = new ArrayList<>();
+    @Override
+    public List<EntityData> read(ByteBuf buffer) {
+        ArrayList<EntityData> entityData = new ArrayList<>();
 
-		EntityData data;
-		do {
-			data = type.read(buffer);
-			if (data != null) {
-				entityData.add(data);
-			}
-		} while (data != null);
+        EntityData data;
+        do {
+            data = type.read(buffer);
+            if (data != null) {
+                entityData.add(data);
+            }
+        } while (data != null);
 
-		return entityData;
-	}
+        return entityData;
+    }
 
-	@Override
-	public void write(ByteBuf buffer, List<EntityData> entityData) {
-		for (EntityData meta : entityData) {
-			type.write(buffer, meta);
-		}
-		if (entityData.isEmpty()) {
-			type.write(buffer, new EntityData(0, EntityDataTypes1_7_6_10.BYTE, (byte) 0));
-		}
-		buffer.writeByte(127);
-	}
-}
+    @Override
+    public void write(ByteBuf buffer, List<EntityData> entityData) {
+        for (EntityData meta : entityData) {
+            type.write(buffer, meta);
+        }
+        if (entityData.isEmpty()) {
+            type.write(buffer, new EntityData(0, EntityDataTypes1_7_6_10.BYTE, (byte) 0));
+        }
+        buffer.writeByte(127);
+    }
+}

common/src/main/java/com/viaversion/viarewind/api/type/entitydata/EntityDataType.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -23,23 +23,23 @@ import com.viaversion.viaversion.api.type.types.entitydata.EntityDataTypeTemplat
 import io.netty.buffer.ByteBuf;
 
 public class EntityDataType extends EntityDataTypeTemplate {
-	@Override
-	public EntityData read(ByteBuf buffer) {
-		byte item = buffer.readByte();
-		if (item == 127) {
-			return null;
-		} else {
-			int typeID = (item & 224) >> 5;
-			EntityDataTypes1_7_6_10 type = EntityDataTypes1_7_6_10.byId(typeID);
-			int id = item & 31;
-			return new EntityData(id, type, type.type().read(buffer));
-		}
-	}
+    @Override
+    public EntityData read(ByteBuf buffer) {
+        byte item = buffer.readByte();
+        if (item == 127) {
+            return null;
+        } else {
+            int typeID = (item & 224) >> 5;
+            EntityDataTypes1_7_6_10 type = EntityDataTypes1_7_6_10.byId(typeID);
+            int id = item & 31;
+            return new EntityData(id, type, type.type().read(buffer));
+        }
+    }
 
-	@Override
-	public void write(ByteBuf buffer, EntityData meta) {
-		int item = (meta.dataType().typeId() << 5 | meta.id() & 31) & 255;
-		buffer.writeByte(item);
-		meta.dataType().type().write(buffer, meta.getValue());
-	}
+    @Override
+    public void write(ByteBuf buffer, EntityData meta) {
+        int item = (meta.dataType().typeId() << 5 | meta.id() & 31) & 255;
+        buffer.writeByte(item);
+        meta.dataType().type().write(buffer, meta.getValue());
+    }
 }

common/src/main/java/com/viaversion/viarewind/api/type/item/ItemArrayType.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -25,26 +25,26 @@ import io.netty.buffer.ByteBuf;
 
 public class ItemArrayType extends Type<Item[]> {
 
-	public ItemArrayType() {
-		super(Item[].class);
-	}
+    public ItemArrayType() {
+        super(Item[].class);
+    }
 
-	@Override
-	public Item[] read(ByteBuf buffer) {
-		int amount = Types.SHORT.readPrimitive(buffer);
-		Item[] items = new Item[amount];
+    @Override
+    public Item[] read(ByteBuf buffer) {
+        int amount = Types.SHORT.readPrimitive(buffer);
+        Item[] items = new Item[amount];
 
-		for (int i = 0; i < amount; ++i) {
-			items[i] = RewindTypes.COMPRESSED_NBT_ITEM.read(buffer);
-		}
-		return items;
-	}
+        for (int i = 0; i < amount; ++i) {
+            items[i] = RewindTypes.COMPRESSED_NBT_ITEM.read(buffer);
+        }
+        return items;
+    }
 
-	@Override
-	public void write(ByteBuf buffer, Item[] items) {
-		Types.SHORT.writePrimitive(buffer, (short) items.length);
-		for (Item item : items) {
-			RewindTypes.COMPRESSED_NBT_ITEM.write(buffer, item);
-		}
-	}
+    @Override
+    public void write(ByteBuf buffer, Item[] items) {
+        Types.SHORT.writePrimitive(buffer, (short) items.length);
+        for (Item item : items) {
+            RewindTypes.COMPRESSED_NBT_ITEM.write(buffer, item);
+        }
+    }
 }

common/src/main/java/com/viaversion/viarewind/api/type/item/ItemType.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -25,33 +25,33 @@ import io.netty.buffer.ByteBuf;
 
 public class ItemType extends Type<Item> {
 
-	public ItemType() {
-		super(Item.class);
-	}
+    public ItemType() {
+        super(Item.class);
+    }
 
-	@Override
-	public Item read(ByteBuf buffer) {
-		short id = buffer.readShort();
-		if (id < 0) {
-			return null;
-		}
-		Item item = new DataItem();
-		item.setIdentifier(id);
-		item.setAmount(buffer.readByte());
-		item.setData(buffer.readShort());
-		item.setTag(RewindTypes.COMPRESSED_NBT.read(buffer));
-		return item;
-	}
+    @Override
+    public Item read(ByteBuf buffer) {
+        short id = buffer.readShort();
+        if (id < 0) {
+            return null;
+        }
+        Item item = new DataItem();
+        item.setIdentifier(id);
+        item.setAmount(buffer.readByte());
+        item.setData(buffer.readShort());
+        item.setTag(RewindTypes.COMPRESSED_NBT.read(buffer));
+        return item;
+    }
 
-	@Override
-	public void write(ByteBuf buffer, Item item) {
-		if (item == null) {
-			buffer.writeShort(-1);
-		} else {
-			buffer.writeShort(item.identifier());
-			buffer.writeByte(item.amount());
-			buffer.writeShort(item.data());
-			RewindTypes.COMPRESSED_NBT.write(buffer, item.tag());
-		}
-	}
+    @Override
+    public void write(ByteBuf buffer, Item item) {
+        if (item == null) {
+            buffer.writeShort(-1);
+        } else {
+            buffer.writeShort(item.identifier());
+            buffer.writeByte(item.amount());
+            buffer.writeShort(item.data());
+            RewindTypes.COMPRESSED_NBT.write(buffer, item.tag());
+        }
+    }
 }

common/src/main/java/com/viaversion/viarewind/api/type/item/NBTType.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -17,57 +17,56 @@
  */
 package com.viaversion.viarewind.api.type.item;
 
-import com.viaversion.viaversion.api.type.Type;
-import com.viaversion.nbt.tag.CompoundTag;
 import com.viaversion.nbt.io.NBTIO;
+import com.viaversion.nbt.tag.CompoundTag;
+import com.viaversion.viaversion.api.type.Type;
 import io.netty.buffer.ByteBuf;
 import io.netty.buffer.ByteBufInputStream;
 import io.netty.buffer.ByteBufOutputStream;
-
 import java.io.IOException;
 import java.util.zip.GZIPInputStream;
 import java.util.zip.GZIPOutputStream;
 
 public class NBTType extends Type<CompoundTag> {
-	public NBTType() {
-		super(CompoundTag.class);
-	}
+    public NBTType() {
+        super(CompoundTag.class);
+    }
 
-	@Override
-	public CompoundTag read(ByteBuf buffer) {
-		short length = buffer.readShort();
-		if (length <= 0) {
-			return null;
-		}
+    @Override
+    public CompoundTag read(ByteBuf buffer) {
+        short length = buffer.readShort();
+        if (length <= 0) {
+            return null;
+        }
 
-		ByteBuf compressed = buffer.readSlice(length);
+        ByteBuf compressed = buffer.readSlice(length);
 
-		try (GZIPInputStream gzipStream = new GZIPInputStream(new ByteBufInputStream(compressed))) {
-			return NBTIO.reader(CompoundTag.class).named().read(gzipStream);
-		} catch (IOException e) {
-			throw new RuntimeException(e);
-		}
-	}
+        try (GZIPInputStream gzipStream = new GZIPInputStream(new ByteBufInputStream(compressed))) {
+            return NBTIO.reader(CompoundTag.class).named().read(gzipStream);
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
 
-	@Override
-	public void write(ByteBuf buffer, CompoundTag nbt) {
-		if (nbt == null) {
-			buffer.writeShort(-1);
-			return;
-		}
+    @Override
+    public void write(ByteBuf buffer, CompoundTag nbt) {
+        if (nbt == null) {
+            buffer.writeShort(-1);
+            return;
+        }
 
-		ByteBuf compressedBuf = buffer.alloc().buffer();
-		try {
-			try (GZIPOutputStream gzipStream = new GZIPOutputStream(new ByteBufOutputStream(compressedBuf))) {
-				NBTIO.writer().named().write(gzipStream, nbt);
-			} catch (IOException e) {
-				throw new RuntimeException(e);
-			}
+        ByteBuf compressedBuf = buffer.alloc().buffer();
+        try {
+            try (GZIPOutputStream gzipStream = new GZIPOutputStream(new ByteBufOutputStream(compressedBuf))) {
+                NBTIO.writer().named().write(gzipStream, nbt);
+            } catch (IOException e) {
+                throw new RuntimeException(e);
+            }
 
-			buffer.writeShort(compressedBuf.readableBytes());
-			buffer.writeBytes(compressedBuf);
-		} finally {
-			compressedBuf.release();
-		}
-	}
+            buffer.writeShort(compressedBuf.readableBytes());
+            buffer.writeBytes(compressedBuf);
+        } finally {
+            compressedBuf.release();
+        }
+    }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_7_6_10to1_7_2_5/Protocol1_7_6_10To1_7_2_5.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -27,90 +27,89 @@ import com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;
 import com.viaversion.viaversion.api.protocol.remapper.ValueTransformer;
 import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.protocols.base.ClientboundLoginPackets;
-
 import java.util.ArrayList;
 import java.util.List;
 import java.util.stream.Collectors;
 
 public class Protocol1_7_6_10To1_7_2_5 extends AbstractProtocol<ClientboundPackets1_7_2_5, ClientboundPackets1_7_2_5, ServerboundPackets1_7_2_5, ServerboundPackets1_7_2_5> {
 
-	public static final ValueTransformer<String, String> REMOVE_DASHES = new ValueTransformer<>(Types.STRING) {
-		@Override
-		public String transform(PacketWrapper wrapper, String s) {
-			return s.replace("-", "");
-		}
-	};
+    public static final ValueTransformer<String, String> REMOVE_DASHES = new ValueTransformer<>(Types.STRING) {
+        @Override
+        public String transform(PacketWrapper wrapper, String s) {
+            return s.replace("-", "");
+        }
+    };
 
-	public Protocol1_7_6_10To1_7_2_5() {
-		super(ClientboundPackets1_7_2_5.class, ClientboundPackets1_7_2_5.class, ServerboundPackets1_7_2_5.class, ServerboundPackets1_7_2_5.class);
-	}
+    public Protocol1_7_6_10To1_7_2_5() {
+        super(ClientboundPackets1_7_2_5.class, ClientboundPackets1_7_2_5.class, ServerboundPackets1_7_2_5.class, ServerboundPackets1_7_2_5.class);
+    }
 
-	@Override
-	protected void registerPackets() {
-		this.registerClientbound(State.LOGIN, ClientboundLoginPackets.LOGIN_FINISHED, new PacketHandlers() {
-			@Override
-			public void register() {
-				map(Types.STRING, REMOVE_DASHES); // Uuid
-				map(Types.STRING); // Name
-			}
-		});
+    @Override
+    protected void registerPackets() {
+        this.registerClientbound(State.LOGIN, ClientboundLoginPackets.LOGIN_FINISHED, new PacketHandlers() {
+            @Override
+            public void register() {
+                map(Types.STRING, REMOVE_DASHES); // Uuid
+                map(Types.STRING); // Name
+            }
+        });
 
-		this.registerClientbound(ClientboundPackets1_7_2_5.ADD_PLAYER, new PacketHandlers() {
-			@Override
-			public void register() {
-				map(Types.VAR_INT); // Entity id
-				map(Types.STRING, REMOVE_DASHES); // Uuid
-				map(Types.STRING); // Name
-				handler(wrapper -> {
-					final int size = wrapper.read(Types.VAR_INT); // Data count
-					for (int i = 0; i < size; i++) {
-						wrapper.read(Types.STRING); // Data name
-						wrapper.read(Types.STRING); // Data value
-						wrapper.read(Types.STRING); // Data signature
-					}
-				});
-				map(Types.INT); // X
-				map(Types.INT); // Y
-				map(Types.INT); // Z
-				map(Types.BYTE); // Yaw
-				map(Types.BYTE); // Pitch
-				map(Types.SHORT); // Item in hand
-				map(RewindTypes.ENTITY_DATA_LIST1_7); // Entity data
-			}
-		});
+        this.registerClientbound(ClientboundPackets1_7_2_5.ADD_PLAYER, new PacketHandlers() {
+            @Override
+            public void register() {
+                map(Types.VAR_INT); // Entity id
+                map(Types.STRING, REMOVE_DASHES); // Uuid
+                map(Types.STRING); // Name
+                handler(wrapper -> {
+                    final int size = wrapper.read(Types.VAR_INT); // Data count
+                    for (int i = 0; i < size; i++) {
+                        wrapper.read(Types.STRING); // Data name
+                        wrapper.read(Types.STRING); // Data value
+                        wrapper.read(Types.STRING); // Data signature
+                    }
+                });
+                map(Types.INT); // X
+                map(Types.INT); // Y
+                map(Types.INT); // Z
+                map(Types.BYTE); // Yaw
+                map(Types.BYTE); // Pitch
+                map(Types.SHORT); // Item in hand
+                map(RewindTypes.ENTITY_DATA_LIST1_7); // Entity data
+            }
+        });
 
-		this.registerClientbound(ClientboundPackets1_7_2_5.SET_PLAYER_TEAM, new PacketHandlers() {
-			@Override
-			public void register() {
-				map(Types.STRING); // Team name
-				map(Types.BYTE); // Mode
-				handler(wrapper -> {
-					final byte mode = wrapper.get(Types.BYTE, 0);
-					if (mode == 0 || mode == 2) { // Team is created or information is updated
-						wrapper.passthrough(Types.STRING); // Team display name
-						wrapper.passthrough(Types.STRING); // Team prefix
-						wrapper.passthrough(Types.STRING); // Team suffix
-						wrapper.passthrough(Types.BYTE); // Friendly fire
-					}
-					if (mode == 0 || mode == 3 || mode == 4) { // Team is created, player is added or player is removed
-						List<String> entryList = new ArrayList<>();
-						final int size = wrapper.read(Types.SHORT);
-						for (int i = 0; i < size; i++) {
-							entryList.add(wrapper.read(Types.STRING));
-						}
+        this.registerClientbound(ClientboundPackets1_7_2_5.SET_PLAYER_TEAM, new PacketHandlers() {
+            @Override
+            public void register() {
+                map(Types.STRING); // Team name
+                map(Types.BYTE); // Mode
+                handler(wrapper -> {
+                    final byte mode = wrapper.get(Types.BYTE, 0);
+                    if (mode == 0 || mode == 2) { // Team is created or information is updated
+                        wrapper.passthrough(Types.STRING); // Team display name
+                        wrapper.passthrough(Types.STRING); // Team prefix
+                        wrapper.passthrough(Types.STRING); // Team suffix
+                        wrapper.passthrough(Types.BYTE); // Friendly fire
+                    }
+                    if (mode == 0 || mode == 3 || mode == 4) { // Team is created, player is added or player is removed
+                        List<String> entryList = new ArrayList<>();
+                        final int size = wrapper.read(Types.SHORT);
+                        for (int i = 0; i < size; i++) {
+                            entryList.add(wrapper.read(Types.STRING));
+                        }
 
-						entryList = entryList.stream()
-							.map(it -> it.length() > 16 ? it.substring(0, 16) : it) // trim to 16 characters
-							.distinct() // remove duplicates
-							.collect(Collectors.toList());
+                        entryList = entryList.stream()
+                            .map(it -> it.length() > 16 ? it.substring(0, 16) : it) // trim to 16 characters
+                            .distinct() // remove duplicates
+                            .collect(Collectors.toList());
 
-						wrapper.write(Types.SHORT, (short) entryList.size());
-						for (String entry : entryList) {
-							wrapper.write(Types.STRING, entry);
-						}
-					}
-				});
-			}
-		});
-	}
+                        wrapper.write(Types.SHORT, (short) entryList.size());
+                        for (String entry : entryList) {
+                            wrapper.write(Types.STRING, entry);
+                        }
+                    }
+                });
+            }
+        });
+    }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_7_6_10to1_7_2_5/packet/ClientboundPackets1_7_2_5.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -20,79 +20,79 @@ package com.viaversion.viarewind.protocol.v1_7_6_10to1_7_2_5.packet;
 import com.viaversion.viaversion.api.protocol.packet.ClientboundPacketType;
 
 public enum ClientboundPackets1_7_2_5 implements ClientboundPacketType {
-	KEEP_ALIVE, // 0x00
-	LOGIN, // 0x01
-	CHAT, // 0x02
-	SET_TIME, // 0x03
-	SET_EQUIPPED_ITEM, // 0x04
-	SET_DEFAULT_SPAWN_POSITION, // 0x05
-	SET_HEALTH, // 0x06
-	RESPAWN, // 0x07
-	PLAYER_POSITION, // 0x08
-	SET_CARRIED_ITEM, // 0x09
-	PLAYER_SLEEP, // 0x0A
-	ANIMATE, // 0x0B
-	ADD_PLAYER, // 0x0C
-	TAKE_ITEM_ENTITY, // 0x0D
-	ADD_ENTITY, // 0x0E
-	ADD_MOB, // 0x0F
-	ADD_PAINTING, // 0x10
-	ADD_EXPERIENCE_ORB, // 0x11
-	SET_ENTITY_MOTION, // 0x12
-	REMOVE_ENTITIES, // 0x13
-	MOVE_ENTITY, // 0x14
-	MOVE_ENTITY_POS, // 0x15
-	MOVE_ENTITY_ROT, // 0x16
-	MOVE_ENTITY_POS_ROT, // 0x17
-	TELEPORT_ENTITY, // 0x18
-	ROTATE_HEAD, // 0x19
-	ENTITY_EVENT, // 0x1A
-	SET_ENTITY_LINK, // 0x1B
-	SET_ENTITY_DATA, // 0x1C
-	UPDATE_MOB_EFFECT, // 0x1D
-	REMOVE_MOB_EFFECT, // 0x1E
-	SET_EXPERIENCE, // 0x1F
-	UPDATE_ATTRIBUTES, // 0x20
-	LEVEL_CHUNK, // 0x21
-	CHUNK_BLOCKS_UPDATE, // 0x22
-	BLOCK_UPDATE, // 0x23
-	BLOCK_EVENT, // 0x24
-	BLOCK_DESTRUCTION, // 0x25
-	MAP_BULK_CHUNK, // 0x26
-	EXPLODE, // 0x27
-	LEVEL_EVENT, // 0x28
-	CUSTOM_SOUND, // 0x29
-	LEVEL_PARTICLES, // 0x2A
-	GAME_EVENT, // 0x2B
-	ADD_GLOBAL_ENTITY, // 0x2C
-	OPEN_SCREEN, // 0x2D
-	CONTAINER_CLOSE, // 0x2E
-	CONTAINER_SET_SLOT, // 0x2F
-	CONTAINER_SET_CONTENT, // 0x30
-	CONTAINER_SET_DATA, // 0x31
-	CONTAINER_ACK, // 0x32
-	UPDATE_SIGN, // 0x33
-	MAP_ITEM_DATA, // 0x34
-	BLOCK_ENTITY_DATA, // 0x35
-	OPEN_SIGN_EDITOR, // 0x36
-	AWARD_STATS, // 0x37
-	PLAYER_INFO, // 0x38
-	PLAYER_ABILITIES, // 0x39
-	COMMAND_SUGGESTIONS, // 0x3A
-	SET_OBJECTIVE, // 0x3B
-	SET_SCORE, // 0x3C
-	SET_DISPLAY_OBJECTIVE, // 0x3D
-	SET_PLAYER_TEAM, // 0x3E
-	CUSTOM_PAYLOAD, // 0x3F
-	DISCONNECT; // 0x40
+    KEEP_ALIVE, // 0x00
+    LOGIN, // 0x01
+    CHAT, // 0x02
+    SET_TIME, // 0x03
+    SET_EQUIPPED_ITEM, // 0x04
+    SET_DEFAULT_SPAWN_POSITION, // 0x05
+    SET_HEALTH, // 0x06
+    RESPAWN, // 0x07
+    PLAYER_POSITION, // 0x08
+    SET_CARRIED_ITEM, // 0x09
+    PLAYER_SLEEP, // 0x0A
+    ANIMATE, // 0x0B
+    ADD_PLAYER, // 0x0C
+    TAKE_ITEM_ENTITY, // 0x0D
+    ADD_ENTITY, // 0x0E
+    ADD_MOB, // 0x0F
+    ADD_PAINTING, // 0x10
+    ADD_EXPERIENCE_ORB, // 0x11
+    SET_ENTITY_MOTION, // 0x12
+    REMOVE_ENTITIES, // 0x13
+    MOVE_ENTITY, // 0x14
+    MOVE_ENTITY_POS, // 0x15
+    MOVE_ENTITY_ROT, // 0x16
+    MOVE_ENTITY_POS_ROT, // 0x17
+    TELEPORT_ENTITY, // 0x18
+    ROTATE_HEAD, // 0x19
+    ENTITY_EVENT, // 0x1A
+    SET_ENTITY_LINK, // 0x1B
+    SET_ENTITY_DATA, // 0x1C
+    UPDATE_MOB_EFFECT, // 0x1D
+    REMOVE_MOB_EFFECT, // 0x1E
+    SET_EXPERIENCE, // 0x1F
+    UPDATE_ATTRIBUTES, // 0x20
+    LEVEL_CHUNK, // 0x21
+    CHUNK_BLOCKS_UPDATE, // 0x22
+    BLOCK_UPDATE, // 0x23
+    BLOCK_EVENT, // 0x24
+    BLOCK_DESTRUCTION, // 0x25
+    MAP_BULK_CHUNK, // 0x26
+    EXPLODE, // 0x27
+    LEVEL_EVENT, // 0x28
+    CUSTOM_SOUND, // 0x29
+    LEVEL_PARTICLES, // 0x2A
+    GAME_EVENT, // 0x2B
+    ADD_GLOBAL_ENTITY, // 0x2C
+    OPEN_SCREEN, // 0x2D
+    CONTAINER_CLOSE, // 0x2E
+    CONTAINER_SET_SLOT, // 0x2F
+    CONTAINER_SET_CONTENT, // 0x30
+    CONTAINER_SET_DATA, // 0x31
+    CONTAINER_ACK, // 0x32
+    UPDATE_SIGN, // 0x33
+    MAP_ITEM_DATA, // 0x34
+    BLOCK_ENTITY_DATA, // 0x35
+    OPEN_SIGN_EDITOR, // 0x36
+    AWARD_STATS, // 0x37
+    PLAYER_INFO, // 0x38
+    PLAYER_ABILITIES, // 0x39
+    COMMAND_SUGGESTIONS, // 0x3A
+    SET_OBJECTIVE, // 0x3B
+    SET_SCORE, // 0x3C
+    SET_DISPLAY_OBJECTIVE, // 0x3D
+    SET_PLAYER_TEAM, // 0x3E
+    CUSTOM_PAYLOAD, // 0x3F
+    DISCONNECT; // 0x40
 
-	@Override
-	public int getId() {
-		return ordinal();
-	}
+    @Override
+    public int getId() {
+        return ordinal();
+    }
 
-	@Override
-	public String getName() {
-		return name();
-	}
+    @Override
+    public String getName() {
+        return name();
+    }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_7_6_10to1_7_2_5/packet/ServerboundPackets1_7_2_5.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -20,38 +20,38 @@ package com.viaversion.viarewind.protocol.v1_7_6_10to1_7_2_5.packet;
 import com.viaversion.viaversion.api.protocol.packet.ServerboundPacketType;
 
 public enum ServerboundPackets1_7_2_5 implements ServerboundPacketType {
-	KEEP_ALIVE, // 0x00
-	CHAT, // 0x01
-	INTERACT, // 0x02
-	MOVE_PLAYER_STATUS_ONLY, // 0x03
-	MOVE_PLAYER_POS, // 0x04
-	MOVE_PLAYER_ROT, // 0x05
-	MOVE_PLAYER_POS_ROT, // 0x06
-	PLAYER_ACTION, // 0x07
-	USE_ITEM_ON, // 0x08
-	SET_CARRIED_ITEM, // 0x09
-	SWING, // 0x0A
-	PLAYER_COMMAND, // 0x0B
-	PLAYER_INPUT, // 0x0C
-	CONTAINER_CLOSE, // 0x0D
-	CONTAINER_CLICK, // 0x0E
-	CONTAINER_ACK, // 0x0F
-	SET_CREATIVE_MODE_SLOT, // 0x10
-	CONTAINER_BUTTON_CLICK, // 0x11
-	SIGN_UPDATE, // 0x12
-	PLAYER_ABILITIES, // 0x13
-	COMMAND_SUGGESTION, // 0x14
-	CLIENT_INFORMATION, // 0x15
-	CLIENT_COMMAND, // 0x16
-	CUSTOM_PAYLOAD; // 0x17
+    KEEP_ALIVE, // 0x00
+    CHAT, // 0x01
+    INTERACT, // 0x02
+    MOVE_PLAYER_STATUS_ONLY, // 0x03
+    MOVE_PLAYER_POS, // 0x04
+    MOVE_PLAYER_ROT, // 0x05
+    MOVE_PLAYER_POS_ROT, // 0x06
+    PLAYER_ACTION, // 0x07
+    USE_ITEM_ON, // 0x08
+    SET_CARRIED_ITEM, // 0x09
+    SWING, // 0x0A
+    PLAYER_COMMAND, // 0x0B
+    PLAYER_INPUT, // 0x0C
+    CONTAINER_CLOSE, // 0x0D
+    CONTAINER_CLICK, // 0x0E
+    CONTAINER_ACK, // 0x0F
+    SET_CREATIVE_MODE_SLOT, // 0x10
+    CONTAINER_BUTTON_CLICK, // 0x11
+    SIGN_UPDATE, // 0x12
+    PLAYER_ABILITIES, // 0x13
+    COMMAND_SUGGESTION, // 0x14
+    CLIENT_INFORMATION, // 0x15
+    CLIENT_COMMAND, // 0x16
+    CUSTOM_PAYLOAD; // 0x17
 
-	@Override
-	public int getId() {
-		return ordinal();
-	}
+    @Override
+    public int getId() {
+        return ordinal();
+    }
 
-	@Override
-	public String getName() {
-		return name();
-	}
+    @Override
+    public String getName() {
+        return name();
+    }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_8to1_7_6_10/Protocol1_8To1_7_6_10.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -22,13 +22,23 @@ import com.viaversion.viarewind.ViaRewind;
 import com.viaversion.viarewind.api.data.RewindMappingData;
 import com.viaversion.viarewind.protocol.v1_7_6_10to1_7_2_5.packet.ClientboundPackets1_7_2_5;
 import com.viaversion.viarewind.protocol.v1_7_6_10to1_7_2_5.packet.ServerboundPackets1_7_2_5;
-import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.rewriter.EntityPacketRewriter1_8;
-import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.rewriter.*;
 import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.provider.CompressionHandlerProvider;
 import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.provider.compression.TrackingCompressionHandlerProvider;
-import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.storage.*;
+import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.rewriter.BlockItemPacketRewriter1_8;
+import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.rewriter.EntityPacketRewriter1_8;
+import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.rewriter.PlayerPacketRewriter1_8;
+import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.rewriter.ScoreboardPacketRewriter1_8;
+import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.rewriter.WorldPacketRewriter1_8;
+import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.storage.CompressionStatusTracker;
+import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.storage.EntityTracker1_8;
+import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.storage.GameProfileStorage;
+import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.storage.InventoryTracker;
+import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.storage.PlayerSessionStorage;
+import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.storage.ScoreboardTracker;
+import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.storage.WorldBorderEmulator;
 import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.task.WorldBorderUpdateTask;
 import com.viaversion.viaversion.api.Via;
+import com.viaversion.viaversion.api.connection.ProtocolStorables;
 import com.viaversion.viaversion.api.connection.UserConnection;
 import com.viaversion.viaversion.api.minecraft.ClientWorld;
 import com.viaversion.viaversion.api.platform.providers.ViaProviders;
@@ -42,118 +52,115 @@ import com.viaversion.viaversion.protocols.base.ClientboundLoginPackets;
 import com.viaversion.viaversion.protocols.base.ServerboundLoginPackets;
 import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ClientboundPackets1_8;
 import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ServerboundPackets1_8;
-
 import java.util.concurrent.TimeUnit;
 
 public class Protocol1_8To1_7_6_10 extends BackwardsProtocol<ClientboundPackets1_8, ClientboundPackets1_7_2_5, ServerboundPackets1_8, ServerboundPackets1_7_2_5> {
 
-	public static final RewindMappingData MAPPINGS = new RewindMappingData("1.8", "1.7.10");
+    public static final RewindMappingData MAPPINGS = new RewindMappingData("1.8", "1.7.10");
 
-	private final BlockItemPacketRewriter1_8 itemRewriter = new BlockItemPacketRewriter1_8(this);
-	private final EntityPacketRewriter1_8 entityRewriter = new EntityPacketRewriter1_8(this);
+    private final BlockItemPacketRewriter1_8 itemRewriter = new BlockItemPacketRewriter1_8(this);
+    private final EntityPacketRewriter1_8 entityRewriter = new EntityPacketRewriter1_8(this);
 
-	public Protocol1_8To1_7_6_10() {
-		super(ClientboundPackets1_8.class, ClientboundPackets1_7_2_5.class, ServerboundPackets1_8.class, ServerboundPackets1_7_2_5.class);
-	}
+    public Protocol1_8To1_7_6_10() {
+        super(ClientboundPackets1_8.class, ClientboundPackets1_7_2_5.class, ServerboundPackets1_8.class, ServerboundPackets1_7_2_5.class);
+    }
 
-	@Override
-	protected void registerPackets() {
-		itemRewriter.register();
-		entityRewriter.register();
+    @Override
+    protected void registerPackets() {
+        itemRewriter.register();
+        entityRewriter.register();
 
-		new PlayerPacketRewriter1_8(this).register();
-		new ScoreboardPacketRewriter1_8(this).register();
-		new WorldPacketRewriter1_8(this).register();
+        new PlayerPacketRewriter1_8(this).register();
+        new ScoreboardPacketRewriter1_8(this).register();
+        new WorldPacketRewriter1_8(this).register();
 
-		this.registerClientbound(State.LOGIN, ClientboundLoginPackets.HELLO, new PacketHandlers() {
-			@Override
-			public void register() {
-				map(Types.STRING); // server hash
-				map(Types.BYTE_ARRAY_PRIMITIVE, Types.SHORT_BYTE_ARRAY); // public key
-				map(Types.BYTE_ARRAY_PRIMITIVE, Types.SHORT_BYTE_ARRAY); // verification token
-			}
-		});
-		this.registerClientbound(State.LOGIN, ClientboundLoginPackets.LOGIN_COMPRESSION, new PacketHandlers() {
-			@Override
-			public void register() {
-				handler(wrapper -> {
-					final int threshold = wrapper.read(Types.VAR_INT);
+        this.registerClientbound(State.LOGIN, ClientboundLoginPackets.HELLO, new PacketHandlers() {
+            @Override
+            public void register() {
+                map(Types.STRING); // server hash
+                map(Types.BYTE_ARRAY_PRIMITIVE, Types.SHORT_BYTE_ARRAY); // public key
+                map(Types.BYTE_ARRAY_PRIMITIVE, Types.SHORT_BYTE_ARRAY); // verification token
+            }
+        });
+        this.registerClientbound(State.LOGIN, ClientboundLoginPackets.LOGIN_COMPRESSION, this::handleCompression);
+        this.registerClientbound(ClientboundPackets1_8.SET_COMPRESSION, null, this::handleCompression);
+        this.registerClientbound(ClientboundPackets1_8.KEEP_ALIVE, new PacketHandlers() {
+            @Override
+            public void register() {
+                map(Types.VAR_INT, Types.INT); // id
+            }
+        });
 
-					Via.getManager().getProviders().get(CompressionHandlerProvider.class).onHandleLoginCompressionPacket(wrapper.user(), threshold);
-					wrapper.cancel();
-				});
-			}
-		});
-		this.cancelClientbound(ClientboundPackets1_8.SET_COMPRESSION); // unused
-		this.registerClientbound(ClientboundPackets1_8.KEEP_ALIVE, new PacketHandlers() {
-			@Override
-			public void register() {
-				map(Types.VAR_INT, Types.INT); // id
-			}
-		});
+        this.registerServerbound(State.LOGIN, ServerboundLoginPackets.ENCRYPTION_KEY, new PacketHandlers() {
+            @Override
+            public void register() {
+                map(Types.SHORT_BYTE_ARRAY, Types.BYTE_ARRAY_PRIMITIVE); // shared secret
+                map(Types.SHORT_BYTE_ARRAY, Types.BYTE_ARRAY_PRIMITIVE); // verification token
+            }
+        });
 
-		this.registerServerbound(State.LOGIN, ServerboundLoginPackets.ENCRYPTION_KEY, new PacketHandlers() {
-			@Override
-			public void register() {
-				map(Types.SHORT_BYTE_ARRAY, Types.BYTE_ARRAY_PRIMITIVE); // shared secret
-				map(Types.SHORT_BYTE_ARRAY, Types.BYTE_ARRAY_PRIMITIVE); // verification token
-			}
-		});
+        this.registerServerbound(ServerboundPackets1_7_2_5.KEEP_ALIVE, new PacketHandlers() {
+            @Override
+            public void register() {
+                map(Types.INT, Types.VAR_INT); // id
+            }
+        });
+    }
 
-		this.registerServerbound(ServerboundPackets1_7_2_5.KEEP_ALIVE, new PacketHandlers() {
-			@Override
-			public void register() {
-				map(Types.INT, Types.VAR_INT); // id
-			}
-		});
-	}
+    private void handleCompression(final PacketWrapper wrapper) {
+        wrapper.cancel();
+        final int threshold = wrapper.read(Types.VAR_INT);
 
-	@Override
-	public void transform(Direction direction, State state, PacketWrapper packetWrapper) throws CancelException {
-		Via.getManager().getProviders().get(CompressionHandlerProvider.class).onTransformPacket(packetWrapper.user());
+        Via.getManager().getProviders().get(CompressionHandlerProvider.class).setCompressionThreshold(wrapper.user(), threshold);
+    }
 
-		super.transform(direction, state, packetWrapper);
-	}
+    @Override
+    public void transform(Direction direction, State state, PacketWrapper packetWrapper) throws CancelException {
+        Via.getManager().getProviders().get(CompressionHandlerProvider.class).onTransformPacket(packetWrapper.user());
 
-	@Override
-	public void init(UserConnection connection) {
-		connection.addEntityTracker(this.getClass(), new EntityTracker1_8(connection));
-		connection.addClientWorld(this.getClass(), new ClientWorld());
+        super.transform(direction, state, packetWrapper);
+    }
 
-		connection.put(new InventoryTracker(connection));
-		connection.put(new PlayerSessionStorage(connection));
-		connection.put(new GameProfileStorage(connection));
-		connection.put(new ScoreboardTracker(connection));
-		connection.put(new CompressionStatusTracker(connection));
-		connection.put(new WorldBorderEmulator(connection));
-	}
+    @Override
+    public void init(UserConnection connection) {
+        final ProtocolStorables storables = connection.storables(this);
+        storables.setEntityTracker(new EntityTracker1_8(connection));
+        storables.setClientWorld(new ClientWorld());
 
-	@Override
-	public void register(ViaProviders providers) {
-		providers.register(CompressionHandlerProvider.class, new TrackingCompressionHandlerProvider());
+        connection.put(new InventoryTracker(connection));
+        connection.put(new PlayerSessionStorage(connection));
+        connection.put(new GameProfileStorage(connection));
+        connection.put(new ScoreboardTracker(connection));
+        connection.put(new CompressionStatusTracker(connection));
+        connection.put(new WorldBorderEmulator(connection));
+    }
 
-		if (ViaRewind.getConfig().isEmulateWorldBorder()) {
-			Via.getManager().getScheduler().scheduleRepeating(new WorldBorderUpdateTask(), 0L, 50L, TimeUnit.MILLISECONDS);
-		}
-	}
+    @Override
+    public void register(ViaProviders providers) {
+        providers.register(CompressionHandlerProvider.class, new TrackingCompressionHandlerProvider());
 
-	@Override
-	public RewindMappingData getMappingData() {
-		return MAPPINGS;
-	}
+        if (ViaRewind.getConfig().isEmulateWorldBorder()) {
+            Via.getManager().getScheduler().scheduleRepeating(new WorldBorderUpdateTask(), 0L, 50L, TimeUnit.MILLISECONDS);
+        }
+    }
 
-	@Override
-	public BlockItemPacketRewriter1_8 getItemRewriter() {
-		return itemRewriter;
-	}
+    @Override
+    public RewindMappingData getMappingData() {
+        return MAPPINGS;
+    }
 
-	@Override
-	public EntityPacketRewriter1_8 getEntityRewriter() {
-		return entityRewriter;
-	}
+    @Override
+    public BlockItemPacketRewriter1_8 getItemRewriter() {
+        return itemRewriter;
+    }
 
-	@Override
-	public boolean hasMappingDataToLoad() {
-		return true;
-	}
+    @Override
+    public EntityPacketRewriter1_8 getEntityRewriter() {
+        return entityRewriter;
+    }
+
+    @Override
+    public boolean hasMappingDataToLoad() {
+        return true;
+    }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_8to1_7_6_10/data/ChatItemRewriter.java

@@ -0,0 +1,425 @@
+/*
+ * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
+ * Copyright (C) 2018-2026 ViaVersion and contributors
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viarewind.protocol.v1_8to1_7_6_10.data;
+
+import com.viaversion.nbt.tag.CompoundTag;
+import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.Protocol1_8To1_7_6_10;
+import com.viaversion.viaversion.api.connection.UserConnection;
+import com.viaversion.viaversion.api.minecraft.item.DataItem;
+import com.viaversion.viaversion.api.minecraft.item.Item;
+import com.viaversion.viaversion.libs.fastutil.objects.Object2IntMap;
+import com.viaversion.viaversion.libs.fastutil.objects.Object2IntOpenHashMap;
+import com.viaversion.viaversion.libs.gson.JsonArray;
+import com.viaversion.viaversion.libs.gson.JsonElement;
+import com.viaversion.viaversion.libs.gson.JsonObject;
+import com.viaversion.viaversion.util.ComponentUtil;
+import com.viaversion.viaversion.util.Key;
+import com.viaversion.viaversion.util.SerializerVersion;
+
+// TODO move this into a ComponentRewriter
+@Deprecated
+public final class ChatItemRewriter {
+
+    private static final Object2IntMap<String> NAME_TO_ID = new Object2IntOpenHashMap<>(336);
+
+    static {
+        NAME_TO_ID.put("stone", 1);
+        NAME_TO_ID.put("grass", 2);
+        NAME_TO_ID.put("dirt", 3);
+        NAME_TO_ID.put("cobblestone", 4);
+        NAME_TO_ID.put("planks", 5);
+        NAME_TO_ID.put("sapling", 6);
+        NAME_TO_ID.put("bedrock", 7);
+        NAME_TO_ID.put("sand", 12);
+        NAME_TO_ID.put("gravel", 13);
+        NAME_TO_ID.put("gold_ore", 14);
+        NAME_TO_ID.put("iron_ore", 15);
+        NAME_TO_ID.put("coal_ore", 16);
+        NAME_TO_ID.put("log", 17);
+        NAME_TO_ID.put("leaves", 18);
+        NAME_TO_ID.put("sponge", 19);
+        NAME_TO_ID.put("glass", 20);
+        NAME_TO_ID.put("lapis_ore", 21);
+        NAME_TO_ID.put("lapis_block", 22);
+        NAME_TO_ID.put("dispenser", 23);
+        NAME_TO_ID.put("sandstone", 24);
+        NAME_TO_ID.put("noteblock", 25);
+        NAME_TO_ID.put("golden_rail", 27);
+        NAME_TO_ID.put("detector_rail", 28);
+        NAME_TO_ID.put("sticky_piston", 29);
+        NAME_TO_ID.put("web", 30);
+        NAME_TO_ID.put("tallgrass", 31);
+        NAME_TO_ID.put("deadbush", 32);
+        NAME_TO_ID.put("piston", 33);
+        NAME_TO_ID.put("wool", 35);
+        NAME_TO_ID.put("yellow_flower", 37);
+        NAME_TO_ID.put("red_flower", 38);
+        NAME_TO_ID.put("brown_mushroom", 39);
+        NAME_TO_ID.put("red_mushroom", 40);
+        NAME_TO_ID.put("gold_block", 41);
+        NAME_TO_ID.put("iron_block", 42);
+        NAME_TO_ID.put("stone_slab", 44);
+        NAME_TO_ID.put("brick_block", 45);
+        NAME_TO_ID.put("tnt", 46);
+        NAME_TO_ID.put("bookshelf", 47);
+        NAME_TO_ID.put("mossy_cobblestone", 48);
+        NAME_TO_ID.put("obsidian", 49);
+        NAME_TO_ID.put("torch", 50);
+        NAME_TO_ID.put("mob_spawner", 52);
+        NAME_TO_ID.put("oak_stairs", 53);
+        NAME_TO_ID.put("chest", 54);
+        NAME_TO_ID.put("diamond_ore", 56);
+        NAME_TO_ID.put("diamond_block", 57);
+        NAME_TO_ID.put("crafting_table", 58);
+        NAME_TO_ID.put("farmland", 60);
+        NAME_TO_ID.put("furnace", 61);
+        NAME_TO_ID.put("ladder", 65);
+        NAME_TO_ID.put("rail", 66);
+        NAME_TO_ID.put("stone_stairs", 67);
+        NAME_TO_ID.put("lever", 69);
+        NAME_TO_ID.put("stone_pressure_plate", 70);
+        NAME_TO_ID.put("wooden_pressure_plate", 72);
+        NAME_TO_ID.put("redstone_ore", 73);
+        NAME_TO_ID.put("redstone_torch", 76);
+        NAME_TO_ID.put("stone_button", 77);
+        NAME_TO_ID.put("snow_layer", 78);
+        NAME_TO_ID.put("ice", 79);
+        NAME_TO_ID.put("snow", 80);
+        NAME_TO_ID.put("cactus", 81);
+        NAME_TO_ID.put("clay", 82);
+        NAME_TO_ID.put("jukebox", 84);
+        NAME_TO_ID.put("fence", 85);
+        NAME_TO_ID.put("pumpkin", 86);
+        NAME_TO_ID.put("netherrack", 87);
+        NAME_TO_ID.put("soul_sand", 88);
+        NAME_TO_ID.put("glowstone", 89);
+        NAME_TO_ID.put("lit_pumpkin", 91);
+        NAME_TO_ID.put("stained_glass", 95);
+        NAME_TO_ID.put("trapdoor", 96);
+        NAME_TO_ID.put("monster_egg", 97);
+        NAME_TO_ID.put("stonebrick", 98);
+        NAME_TO_ID.put("brown_mushroom_block", 99);
+        NAME_TO_ID.put("red_mushroom_block", 100);
+        NAME_TO_ID.put("iron_bars", 101);
+        NAME_TO_ID.put("glass_pane", 102);
+        NAME_TO_ID.put("melon_block", 103);
+        NAME_TO_ID.put("vine", 106);
+        NAME_TO_ID.put("fence_gate", 107);
+        NAME_TO_ID.put("brick_stairs", 108);
+        NAME_TO_ID.put("stone_brick_stairs", 109);
+        NAME_TO_ID.put("mycelium", 110);
+        NAME_TO_ID.put("waterlily", 111);
+        NAME_TO_ID.put("nether_brick", 112);
+        NAME_TO_ID.put("nether_brick_fence", 113);
+        NAME_TO_ID.put("nether_brick_stairs", 114);
+        NAME_TO_ID.put("enchanting_table", 116);
+        NAME_TO_ID.put("end_portal_frame", 120);
+        NAME_TO_ID.put("end_stone", 121);
+        NAME_TO_ID.put("dragon_egg", 122);
+        NAME_TO_ID.put("redstone_lamp", 123);
+        NAME_TO_ID.put("wooden_slab", 126);
+        NAME_TO_ID.put("sandstone_stairs", 128);
+        NAME_TO_ID.put("emerald_ore", 129);
+        NAME_TO_ID.put("ender_chest", 130);
+        NAME_TO_ID.put("tripwire_hook", 131);
+        NAME_TO_ID.put("emerald_block", 133);
+        NAME_TO_ID.put("spruce_stairs", 134);
+        NAME_TO_ID.put("birch_stairs", 135);
+        NAME_TO_ID.put("jungle_stairs", 136);
+        NAME_TO_ID.put("command_block", 137);
+        NAME_TO_ID.put("beacon", 138);
+        NAME_TO_ID.put("cobblestone_wall", 139);
+        NAME_TO_ID.put("wooden_button", 143);
+        NAME_TO_ID.put("anvil", 145);
+        NAME_TO_ID.put("trapped_chest", 146);
+        NAME_TO_ID.put("light_weighted_pressure_plate", 147);
+        NAME_TO_ID.put("heavy_weighted_pressure_plate", 148);
+        NAME_TO_ID.put("daylight_detector", 151);
+        NAME_TO_ID.put("redstone_block", 152);
+        NAME_TO_ID.put("quartz_ore", 153);
+        NAME_TO_ID.put("hopper", 154);
+        NAME_TO_ID.put("quartz_block", 155);
+        NAME_TO_ID.put("quartz_stairs", 156);
+        NAME_TO_ID.put("activator_rail", 157);
+        NAME_TO_ID.put("dropper", 158);
+        NAME_TO_ID.put("stained_hardened_clay", 159);
+        NAME_TO_ID.put("stained_glass_pane", 160);
+        NAME_TO_ID.put("leaves2", 161);
+        NAME_TO_ID.put("log2", 162);
+        NAME_TO_ID.put("acacia_stairs", 163);
+        NAME_TO_ID.put("dark_oak_stairs", 164);
+        NAME_TO_ID.put("slime", 165);
+        NAME_TO_ID.put("barrier", 166);
+        NAME_TO_ID.put("iron_trapdoor", 167);
+        NAME_TO_ID.put("prismarine", 168);
+        NAME_TO_ID.put("sea_lantern", 169);
+        NAME_TO_ID.put("hay_block", 170);
+        NAME_TO_ID.put("carpet", 171);
+        NAME_TO_ID.put("hardened_clay", 172);
+        NAME_TO_ID.put("coal_block", 173);
+        NAME_TO_ID.put("packed_ice", 174);
+        NAME_TO_ID.put("double_plant", 175);
+        NAME_TO_ID.put("red_sandstone", 179);
+        NAME_TO_ID.put("red_sandstone_stairs", 180);
+        NAME_TO_ID.put("stone_slab2", 182);
+        NAME_TO_ID.put("spruce_fence_gate", 183);
+        NAME_TO_ID.put("birch_fence_gate", 184);
+        NAME_TO_ID.put("jungle_fence_gate", 185);
+        NAME_TO_ID.put("dark_oak_fence_gate", 186);
+        NAME_TO_ID.put("acacia_fence_gate", 187);
+        NAME_TO_ID.put("spruce_fence", 188);
+        NAME_TO_ID.put("birch_fence", 189);
+        NAME_TO_ID.put("jungle_fence", 190);
+        NAME_TO_ID.put("dark_oak_fence", 191);
+        NAME_TO_ID.put("acacia_fence", 192);
+        NAME_TO_ID.put("iron_shovel", 256);
+        NAME_TO_ID.put("iron_pickaxe", 257);
+        NAME_TO_ID.put("iron_axe", 258);
+        NAME_TO_ID.put("flint_and_steel", 259);
+        NAME_TO_ID.put("apple", 260);
+        NAME_TO_ID.put("bow", 261);
+        NAME_TO_ID.put("arrow", 262);
+        NAME_TO_ID.put("coal", 263);
+        NAME_TO_ID.put("diamond", 264);
+        NAME_TO_ID.put("iron_ingot", 265);
+        NAME_TO_ID.put("gold_ingot", 266);
+        NAME_TO_ID.put("iron_sword", 267);
+        NAME_TO_ID.put("wooden_sword", 268);
+        NAME_TO_ID.put("wooden_shovel", 269);
+        NAME_TO_ID.put("wooden_pickaxe", 270);
+        NAME_TO_ID.put("wooden_axe", 271);
+        NAME_TO_ID.put("stone_sword", 272);
+        NAME_TO_ID.put("stone_shovel", 273);
+        NAME_TO_ID.put("stone_pickaxe", 274);
+        NAME_TO_ID.put("stone_axe", 275);
+        NAME_TO_ID.put("diamond_sword", 276);
+        NAME_TO_ID.put("diamond_shovel", 277);
+        NAME_TO_ID.put("diamond_pickaxe", 278);
+        NAME_TO_ID.put("diamond_axe", 279);
+        NAME_TO_ID.put("stick", 280);
+        NAME_TO_ID.put("bowl", 281);
+        NAME_TO_ID.put("mushroom_stew", 282);
+        NAME_TO_ID.put("golden_sword", 283);
+        NAME_TO_ID.put("golden_shovel", 284);
+        NAME_TO_ID.put("golden_pickaxe", 285);
+        NAME_TO_ID.put("golden_axe", 286);
+        NAME_TO_ID.put("string", 287);
+        NAME_TO_ID.put("feather", 288);
+        NAME_TO_ID.put("gunpowder", 289);
+        NAME_TO_ID.put("wooden_hoe", 290);
+        NAME_TO_ID.put("stone_hoe", 291);
+        NAME_TO_ID.put("iron_hoe", 292);
+        NAME_TO_ID.put("diamond_hoe", 293);
+        NAME_TO_ID.put("golden_hoe", 294);
+        NAME_TO_ID.put("wheat_seeds", 295);
+        NAME_TO_ID.put("wheat", 296);
+        NAME_TO_ID.put("bread", 297);
+        NAME_TO_ID.put("leather_helmet", 298);
+        NAME_TO_ID.put("leather_chestplate", 299);
+        NAME_TO_ID.put("leather_leggings", 300);
+        NAME_TO_ID.put("leather_boots", 301);
+        NAME_TO_ID.put("chainmail_helmet", 302);
+        NAME_TO_ID.put("chainmail_chestplate", 303);
+        NAME_TO_ID.put("chainmail_leggings", 304);
+        NAME_TO_ID.put("chainmail_boots", 305);
+        NAME_TO_ID.put("iron_helmet", 306);
+        NAME_TO_ID.put("iron_chestplate", 307);
+        NAME_TO_ID.put("iron_leggings", 308);
+        NAME_TO_ID.put("iron_boots", 309);
+        NAME_TO_ID.put("diamond_helmet", 310);
+        NAME_TO_ID.put("diamond_chestplate", 311);
+        NAME_TO_ID.put("diamond_leggings", 312);
+        NAME_TO_ID.put("diamond_boots", 313);
+        NAME_TO_ID.put("golden_helmet", 314);
+        NAME_TO_ID.put("golden_chestplate", 315);
+        NAME_TO_ID.put("golden_leggings", 316);
+        NAME_TO_ID.put("golden_boots", 317);
+        NAME_TO_ID.put("flint", 318);
+        NAME_TO_ID.put("porkchop", 319);
+        NAME_TO_ID.put("cooked_porkchop", 320);
+        NAME_TO_ID.put("painting", 321);
+        NAME_TO_ID.put("golden_apple", 322);
+        NAME_TO_ID.put("sign", 323);
+        NAME_TO_ID.put("wooden_door", 324);
+        NAME_TO_ID.put("bucket", 325);
+        NAME_TO_ID.put("water_bucket", 326);
+        NAME_TO_ID.put("lava_bucket", 327);
+        NAME_TO_ID.put("minecart", 328);
+        NAME_TO_ID.put("saddle", 329);
+        NAME_TO_ID.put("iron_door", 330);
+        NAME_TO_ID.put("redstone", 331);
+        NAME_TO_ID.put("snowball", 332);
+        NAME_TO_ID.put("boat", 333);
+        NAME_TO_ID.put("leather", 334);
+        NAME_TO_ID.put("milk_bucket", 335);
+        NAME_TO_ID.put("brick", 336);
+        NAME_TO_ID.put("clay_ball", 337);
+        NAME_TO_ID.put("reeds", 338);
+        NAME_TO_ID.put("paper", 339);
+        NAME_TO_ID.put("book", 340);
+        NAME_TO_ID.put("slime_ball", 341);
+        NAME_TO_ID.put("chest_minecart", 342);
+        NAME_TO_ID.put("furnace_minecart", 343);
+        NAME_TO_ID.put("egg", 344);
+        NAME_TO_ID.put("compass", 345);
+        NAME_TO_ID.put("fishing_rod", 346);
+        NAME_TO_ID.put("clock", 347);
+        NAME_TO_ID.put("glowstone_dust", 348);
+        NAME_TO_ID.put("fish", 349);
+        NAME_TO_ID.put("cooked_fish", 350);
+        NAME_TO_ID.put("dye", 351);
+        NAME_TO_ID.put("bone", 352);
+        NAME_TO_ID.put("sugar", 353);
+        NAME_TO_ID.put("cake", 354);
+        NAME_TO_ID.put("bed", 355);
+        NAME_TO_ID.put("repeater", 356);
+        NAME_TO_ID.put("cookie", 357);
+        NAME_TO_ID.put("filled_map", 358);
+        NAME_TO_ID.put("shears", 359);
+        NAME_TO_ID.put("melon", 360);
+        NAME_TO_ID.put("pumpkin_seeds", 361);
+        NAME_TO_ID.put("melon_seeds", 362);
+        NAME_TO_ID.put("beef", 363);
+        NAME_TO_ID.put("cooked_beef", 364);
+        NAME_TO_ID.put("chicken", 365);
+        NAME_TO_ID.put("cooked_chicken", 366);
+        NAME_TO_ID.put("rotten_flesh", 367);
+        NAME_TO_ID.put("ender_pearl", 368);
+        NAME_TO_ID.put("blaze_rod", 369);
+        NAME_TO_ID.put("ghast_tear", 370);
+        NAME_TO_ID.put("gold_nugget", 371);
+        NAME_TO_ID.put("nether_wart", 372);
+        NAME_TO_ID.put("potion", 373);
+        NAME_TO_ID.put("glass_bottle", 374);
+        NAME_TO_ID.put("spider_eye", 375);
+        NAME_TO_ID.put("fermented_spider_eye", 376);
+        NAME_TO_ID.put("blaze_powder", 377);
+        NAME_TO_ID.put("magma_cream", 378);
+        NAME_TO_ID.put("brewing_stand", 379);
+        NAME_TO_ID.put("cauldron", 380);
+        NAME_TO_ID.put("ender_eye", 381);
+        NAME_TO_ID.put("speckled_melon", 382);
+        NAME_TO_ID.put("spawn_egg", 383);
+        NAME_TO_ID.put("experience_bottle", 384);
+        NAME_TO_ID.put("fire_charge", 385);
+        NAME_TO_ID.put("writable_book", 386);
+        NAME_TO_ID.put("written_book", 387);
+        NAME_TO_ID.put("emerald", 388);
+        NAME_TO_ID.put("item_frame", 389);
+        NAME_TO_ID.put("flower_pot", 390);
+        NAME_TO_ID.put("carrot", 391);
+        NAME_TO_ID.put("potato", 392);
+        NAME_TO_ID.put("baked_potato", 393);
+        NAME_TO_ID.put("poisonous_potato", 394);
+        NAME_TO_ID.put("map", 395);
+        NAME_TO_ID.put("golden_carrot", 396);
+        NAME_TO_ID.put("skull", 397);
+        NAME_TO_ID.put("carrot_on_a_stick", 398);
+        NAME_TO_ID.put("nether_star", 399);
+        NAME_TO_ID.put("pumpkin_pie", 400);
+        NAME_TO_ID.put("fireworks", 401);
+        NAME_TO_ID.put("firework_charge", 402);
+        NAME_TO_ID.put("enchanted_book", 403);
+        NAME_TO_ID.put("comparator", 404);
+        NAME_TO_ID.put("netherbrick", 405);
+        NAME_TO_ID.put("quartz", 406);
+        NAME_TO_ID.put("tnt_minecart", 407);
+        NAME_TO_ID.put("hopper_minecart", 408);
+        NAME_TO_ID.put("prismarine_shard", 409);
+        NAME_TO_ID.put("prismarine_crystals", 410);
+        NAME_TO_ID.put("rabbit", 411);
+        NAME_TO_ID.put("cooked_rabbit", 412);
+        NAME_TO_ID.put("rabbit_stew", 413);
+        NAME_TO_ID.put("rabbit_foot", 414);
+        NAME_TO_ID.put("rabbit_hide", 415);
+        NAME_TO_ID.put("armor_stand", 416);
+        NAME_TO_ID.put("iron_horse_armor", 417);
+        NAME_TO_ID.put("golden_horse_armor", 418);
+        NAME_TO_ID.put("diamond_horse_armor", 419);
+        NAME_TO_ID.put("lead", 420);
+        NAME_TO_ID.put("name_tag", 421);
+        NAME_TO_ID.put("command_block_minecart", 422);
+        NAME_TO_ID.put("mutton", 423);
+        NAME_TO_ID.put("cooked_mutton", 424);
+        NAME_TO_ID.put("banner", 425);
+        NAME_TO_ID.put("spruce_door", 427);
+        NAME_TO_ID.put("birch_door", 428);
+        NAME_TO_ID.put("jungle_door", 429);
+        NAME_TO_ID.put("acacia_door", 430);
+        NAME_TO_ID.put("dark_oak_door", 431);
+        NAME_TO_ID.put("record_13", 2256);
+        NAME_TO_ID.put("record_cat", 2257);
+        NAME_TO_ID.put("record_blocks", 2258);
+        NAME_TO_ID.put("record_chirp", 2259);
+        NAME_TO_ID.put("record_far", 2260);
+        NAME_TO_ID.put("record_mall", 2261);
+        NAME_TO_ID.put("record_mellohi", 2262);
+        NAME_TO_ID.put("record_stal", 2263);
+        NAME_TO_ID.put("record_strad", 2264);
+        NAME_TO_ID.put("record_ward", 2265);
+        NAME_TO_ID.put("record_11", 2266);
+        NAME_TO_ID.put("record_wait", 2267);
+    }
+
+    public static void toClient(final Protocol1_8To1_7_6_10 protocol, final UserConnection connection, JsonElement element) {
+        if (element instanceof final JsonObject obj) {
+            if (obj.has("hoverEvent")) {
+                if (!(obj.get("hoverEvent") instanceof final JsonObject hoverEvent)) {
+                    return;
+                }
+
+                if (!hoverEvent.has("action") || !hoverEvent.has("value")) {
+                    return;
+                }
+
+                final String type = hoverEvent.get("action").getAsString();
+                if (!type.equals("show_item")) {
+                    return;
+                }
+
+                final CompoundTag compound = ComponentUtil.deserializeLegacyShowItem(hoverEvent.get("value"), SerializerVersion.V1_8);
+                final int identifier;
+                final String stringId = compound.getString("id");
+                if (stringId != null) {
+                    identifier = NAME_TO_ID.getOrDefault(Key.stripMinecraftNamespace(stringId), compound.getShort("id"));
+                } else {
+                    identifier = compound.getShort("id");
+                }
+                final CompoundTag itemTag = compound.getCompoundTag("tag");
+
+                final Item dataItem = new DataItem(identifier, (byte) 1, (short) 0, itemTag);
+                protocol.getItemRewriter().handleItemToClient(connection, dataItem);
+
+                compound.putInt("id", dataItem.identifier());
+                if (dataItem.tag() != itemTag) {
+                    compound.put("tag", dataItem.tag());
+                }
+                hoverEvent.addProperty("value", SerializerVersion.V1_7.toSNBT(compound));
+            } else if (obj.has("extra")) {
+                toClient(protocol, connection, obj.get("extra"));
+            } else if (obj.has("translate") && obj.has("with")) {
+                toClient(protocol, connection, obj.get("with"));
+            }
+        } else if (element instanceof final JsonArray array) {
+            for (JsonElement value : array) {
+                toClient(protocol, connection, value);
+            }
+        }
+    }
+
+}

common/src/main/java/com/viaversion/viarewind/protocol/v1_8to1_7_6_10/data/ChatNewlineRewriter.java

@@ -0,0 +1,234 @@
+/*
+ * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
+ * Copyright (C) 2018-2026 ViaVersion and contributors
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viarewind.protocol.v1_8to1_7_6_10.data;
+
+import com.viaversion.viaversion.libs.gson.JsonArray;
+import com.viaversion.viaversion.libs.gson.JsonElement;
+import com.viaversion.viaversion.libs.gson.JsonObject;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
+public class ChatNewlineRewriter {
+    private static final String[] STYLE_KEYS = {
+            "color",
+            "bold",
+            "italic",
+            "underlined",
+            "strikethrough",
+            "obfuscated",
+            "clickEvent",
+            "hoverEvent",
+            "insertion"
+    };
+
+    public static List<JsonObject> splitChatComponentByNewline(JsonElement element) {
+        return splitChatComponentByNewline(element, new JsonObject());
+    }
+
+    private static List<JsonObject> splitChatComponentByNewline(JsonElement element, JsonObject inheritedStyle) {
+        List<JsonObject> results = new ArrayList<>();
+        if (element == null || element.isJsonNull()) {
+            return results;
+        }
+
+        if (element.isJsonPrimitive()) {
+            String text = element.getAsString();
+            for (String part : text.split("\n", -1)) {
+                JsonObject obj = inheritedStyle.deepCopy();
+                obj.addProperty("text", part);
+                results.add(obj);
+            }
+            return results;
+        }
+
+        if (element.isJsonArray()) {
+            List<JsonObject> currentLine = new ArrayList<>();
+            JsonObject siblingStyle = inheritedStyle;
+            boolean foundRoot = false;
+
+            for (JsonElement child : element.getAsJsonArray()) {
+                List<JsonObject> splitParts = splitChatComponentByNewline(child, siblingStyle);
+                for (int i = 0; i < splitParts.size(); i++) {
+                    currentLine.add(splitParts.get(i));
+                    if (i < splitParts.size() - 1) {
+                        results.add(mergeLine(currentLine));
+                        currentLine.clear();
+                    }
+                }
+
+                if (!foundRoot && child != null && !child.isJsonNull()) {
+                    siblingStyle = rootStyle(inheritedStyle, child);
+                    foundRoot = true;
+                }
+            }
+
+            if (!currentLine.isEmpty()) {
+                results.add(mergeLine(currentLine));
+            }
+            return results;
+        }
+
+        if (!element.isJsonObject()) {
+            return results;
+        }
+
+        JsonObject obj = element.getAsJsonObject();
+
+        // Build the style for this node: inherit first, then override with this object's style
+        JsonObject currentStyle = mergeStyle(inheritedStyle, obj);
+
+        // Gather components in order: base text then extra array
+        List<JsonElement> ordered = new ArrayList<>();
+        if (obj.has("text")) {
+            ordered.add(obj.get("text"));
+        }
+        if (obj.has("extra") && obj.get("extra").isJsonArray()) {
+            for (JsonElement extra : obj.getAsJsonArray("extra")) {
+                ordered.add(extra);
+            }
+        }
+
+        // If there is no text/extra, return a single object with the style
+        if (ordered.isEmpty()) {
+            JsonObject baseComponent = copyComponentWithoutExtra(obj, currentStyle);
+            results.add(baseComponent != null ? baseComponent : currentStyle);
+            return results;
+        }
+
+        // Build lines by concatenating split pieces
+        List<JsonObject> currentLine = new ArrayList<>();
+        if (!obj.has("text")) {
+            JsonObject baseComponent = copyComponentWithoutExtra(obj, currentStyle);
+            if (baseComponent != null) {
+                currentLine.add(baseComponent);
+            }
+        }
+        for (JsonElement part : ordered) {
+            if (part == null || part.isJsonNull()) {
+                continue;
+            }
+
+            if (part.isJsonPrimitive()) {
+                String text = part.getAsString();
+                String[] split = text.split("\n", -1);
+                for (int i = 0; i < split.length; i++) {
+                    JsonObject piece = currentStyle.deepCopy();
+                    piece.addProperty("text", split[i]);
+                    currentLine.add(piece);
+
+                    if (i < split.length - 1) {
+                        results.add(mergeLine(currentLine));
+                        currentLine.clear();
+                    }
+                }
+                continue;
+            }
+
+            if (part.isJsonObject() || part.isJsonArray()) {
+                List<JsonObject> splitParts = splitChatComponentByNewline(part, currentStyle);
+                for (int i = 0; i < splitParts.size(); i++) {
+                    currentLine.add(splitParts.get(i));
+                    if (i < splitParts.size() - 1) {
+                        results.add(mergeLine(currentLine));
+                        currentLine.clear();
+                    }
+                }
+            }
+        }
+
+        if (!currentLine.isEmpty()) {
+            results.add(mergeLine(currentLine));
+        }
+
+        return results;
+    }
+
+    private static JsonObject rootStyle(JsonObject inheritedStyle, JsonElement element) {
+        if (element == null || element.isJsonNull()) {
+            return inheritedStyle;
+        }
+        if (element.isJsonObject()) {
+            return mergeStyle(inheritedStyle, element.getAsJsonObject());
+        }
+        if (element.isJsonArray()) {
+            for (JsonElement child : element.getAsJsonArray()) {
+                if (child != null && !child.isJsonNull()) {
+                    return rootStyle(inheritedStyle, child);
+                }
+            }
+        }
+        return inheritedStyle;
+    }
+
+    private static JsonObject mergeStyle(JsonObject inheritedStyle, JsonObject obj) {
+        JsonObject currentStyle = inheritedStyle.deepCopy();
+        for (String key : STYLE_KEYS) {
+            if (obj.has(key)) {
+                currentStyle.add(key, obj.get(key).deepCopy());
+            }
+        }
+        return currentStyle;
+    }
+
+    private static JsonObject copyComponentWithoutExtra(JsonObject obj, JsonObject currentStyle) {
+        JsonObject component = currentStyle.deepCopy();
+        for (Map.Entry<String, JsonElement> entry : obj.entrySet()) {
+            String key = entry.getKey();
+            if ("extra".equals(key) || isStyleKey(key)) {
+                continue;
+            }
+
+            component.add(key, entry.getValue().deepCopy());
+        }
+        return component.size() == currentStyle.size() ? null : component;
+    }
+
+    private static boolean isStyleKey(String key) {
+        for (String styleKey : STYLE_KEYS) {
+            if (styleKey.equals(key)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private static JsonObject mergeLine(List<JsonObject> lineParts) {
+        if (lineParts.isEmpty()) {
+            JsonObject empty = new JsonObject();
+            empty.addProperty("text", "");
+            return empty;
+        }
+
+        JsonObject first = lineParts.get(0);
+        if (lineParts.size() == 1) {
+            return first;
+        }
+
+        JsonObject merged = new JsonObject();
+        merged.addProperty("text", "");
+
+        JsonArray extra = new JsonArray();
+        for (JsonObject linePart : lineParts) {
+            extra.add(linePart);
+        }
+        merged.add("extra", extra);
+        return merged;
+    }
+}

common/src/main/java/com/viaversion/viarewind/protocol/v1_8to1_7_6_10/data/EntityDataIndex1_7_6_10.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -22,194 +22,226 @@ import com.viaversion.viaversion.api.minecraft.entities.EntityType;
 import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8;
 import com.viaversion.viaversion.api.minecraft.entitydata.types.EntityDataTypes1_8;
 import com.viaversion.viaversion.util.Pair;
-
 import java.util.HashMap;
 import java.util.Optional;
 
-import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.*;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.ABSTRACT_AGEABLE;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.ABSTRACT_MINECART;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.ARMOR_STAND;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.ARROW;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.BAT;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.BLAZE;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.BOAT;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.CREEPER;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.ENDERMAN;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.END_CRYSTAL;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.ENTITY;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.FIREWORK_ROCKET;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.FURNACE_MINECART;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.GHAST;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.GUARDIAN;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.HORSE;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.IRON_GOLEM;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.ITEM;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.ITEM_FRAME;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.LIVING_ENTITY;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.LIVING_ENTITY_BASE;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.OCELOT;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.PIG;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.PLAYER;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.SHEEP;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.SKELETON;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.SLIME;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.SPIDER;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.TAMABLE_ANIMAL;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.VILLAGER;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.WITCH;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.WITHER;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.WOLF;
+import static com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8.EntityType.ZOMBIE;
 
 public enum EntityDataIndex1_7_6_10 {
 
-	ENTITY_FLAGS(ENTITY, 0, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
-	ENTITY_AIR(ENTITY, 1, EntityDataTypes1_7_6_10.SHORT, EntityDataTypes1_8.SHORT),
-	ENTITY_NAME_TAG(ENTITY, -1, null, 2, EntityDataTypes1_8.STRING),
-	ENTITY_NAME_TAG_VISIBILITY(ENTITY, -1, null, 3, EntityDataTypes1_8.BYTE),
-	ENTITY_SILENT(ENTITY, -1, null, 4, EntityDataTypes1_8.BYTE),
+    ENTITY_FLAGS(ENTITY, 0, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
+    ENTITY_AIR(ENTITY, 1, EntityDataTypes1_7_6_10.SHORT, EntityDataTypes1_8.SHORT),
+    ENTITY_NAME_TAG(ENTITY, -1, null, 2, EntityDataTypes1_8.STRING),
+    ENTITY_NAME_TAG_VISIBILITY(ENTITY, -1, null, 3, EntityDataTypes1_8.BYTE),
+    ENTITY_SILENT(ENTITY, -1, null, 4, EntityDataTypes1_8.BYTE),
 
-	LIVING_ENTITY_BASE_HEALTH(LIVING_ENTITY_BASE, 6, EntityDataTypes1_7_6_10.FLOAT, EntityDataTypes1_8.FLOAT),
-	LIVING_ENTITY_BASE_POTION_EFFECT_COLOR(LIVING_ENTITY_BASE, 7, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
-	LIVING_ENTITY_BASE_IS_POTION_EFFECT_AMBIENT(LIVING_ENTITY_BASE, 8, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
-	LIVING_ENTITY_BASE_ARROWS(LIVING_ENTITY_BASE, 9, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
-	LIVING_ENTITY_BASE_NAME_TAG(LIVING_ENTITY_BASE, 10, EntityDataTypes1_7_6_10.STRING, 2, EntityDataTypes1_8.STRING),
-	LIVING_ENTITY_BASE_NAME_TAG_VISIBILITY(LIVING_ENTITY_BASE, 11, EntityDataTypes1_7_6_10.BYTE, 3, EntityDataTypes1_8.BYTE),
+    LIVING_ENTITY_BASE_HEALTH(LIVING_ENTITY_BASE, 6, EntityDataTypes1_7_6_10.FLOAT, EntityDataTypes1_8.FLOAT),
+    LIVING_ENTITY_BASE_POTION_EFFECT_COLOR(LIVING_ENTITY_BASE, 7, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
+    LIVING_ENTITY_BASE_IS_POTION_EFFECT_AMBIENT(LIVING_ENTITY_BASE, 8, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
+    LIVING_ENTITY_BASE_ARROWS(LIVING_ENTITY_BASE, 9, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
+    LIVING_ENTITY_BASE_NAME_TAG(LIVING_ENTITY_BASE, 10, EntityDataTypes1_7_6_10.STRING, 2, EntityDataTypes1_8.STRING),
+    LIVING_ENTITY_BASE_NAME_TAG_VISIBILITY(LIVING_ENTITY_BASE, 11, EntityDataTypes1_7_6_10.BYTE, 3, EntityDataTypes1_8.BYTE),
 
-	LIVING_ENTITY_AI(LIVING_ENTITY, -1, null, 15, EntityDataTypes1_8.BYTE),
+    LIVING_ENTITY_AI(LIVING_ENTITY, -1, null, 15, EntityDataTypes1_8.BYTE),
 
-	ABSTRACT_AGEABLE_AGE(ABSTRACT_AGEABLE, 12, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.BYTE),
+    ABSTRACT_AGEABLE_AGE(ABSTRACT_AGEABLE, 12, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.BYTE),
 
-	ARMOR_STAND_FLAGS(ARMOR_STAND, -1, null, 10, EntityDataTypes1_8.BYTE),
-	ARMOR_STAND_HEAD_POSITION(ARMOR_STAND, -1, null, 11, EntityDataTypes1_8.ROTATIONS),
-	ARMOR_STAND_BODY_POSITION(ARMOR_STAND, -1, null, 12, EntityDataTypes1_8.ROTATIONS),
-	ARMOR_STAND_LEFT_ARM_POSITION(ARMOR_STAND, -1, null, 13, EntityDataTypes1_8.ROTATIONS),
-	ARMOR_STAND_RIGHT_ARM_POSITION(ARMOR_STAND, -1, null, 14, EntityDataTypes1_8.ROTATIONS),
-	ARMOR_STAND_LEFT_LEG_POSITION(ARMOR_STAND, -1, null, 15, EntityDataTypes1_8.ROTATIONS),
-	ARMOR_STAND_RIGHT_LEG_POSITION(ARMOR_STAND, -1, null, 16, EntityDataTypes1_8.ROTATIONS),
+    ARMOR_STAND_FLAGS(ARMOR_STAND, -1, null, 10, EntityDataTypes1_8.BYTE),
+    ARMOR_STAND_HEAD_POSITION(ARMOR_STAND, -1, null, 11, EntityDataTypes1_8.ROTATIONS),
+    ARMOR_STAND_BODY_POSITION(ARMOR_STAND, -1, null, 12, EntityDataTypes1_8.ROTATIONS),
+    ARMOR_STAND_LEFT_ARM_POSITION(ARMOR_STAND, -1, null, 13, EntityDataTypes1_8.ROTATIONS),
+    ARMOR_STAND_RIGHT_ARM_POSITION(ARMOR_STAND, -1, null, 14, EntityDataTypes1_8.ROTATIONS),
+    ARMOR_STAND_LEFT_LEG_POSITION(ARMOR_STAND, -1, null, 15, EntityDataTypes1_8.ROTATIONS),
+    ARMOR_STAND_RIGHT_LEG_POSITION(ARMOR_STAND, -1, null, 16, EntityDataTypes1_8.ROTATIONS),
 
-	PLAYER_SKIN_FLAGS(PLAYER, 16, EntityDataTypes1_7_6_10.BYTE, 10, EntityDataTypes1_8.BYTE),
-	PLAYER_UNUSED(PLAYER, -1, null, 16, EntityDataTypes1_8.BYTE),
-	PLAYER_ABSORPTION_HEATS(PLAYER, 17, EntityDataTypes1_7_6_10.FLOAT, EntityDataTypes1_8.FLOAT),
-	PLAYER_SCORE(PLAYER, 18, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
+    PLAYER_SKIN_FLAGS(PLAYER, 16, EntityDataTypes1_7_6_10.BYTE, 10, EntityDataTypes1_8.BYTE),
+    PLAYER_UNUSED(PLAYER, -1, null, 16, EntityDataTypes1_8.BYTE),
+    PLAYER_ABSORPTION_HEATS(PLAYER, 17, EntityDataTypes1_7_6_10.FLOAT, EntityDataTypes1_8.FLOAT),
+    PLAYER_SCORE(PLAYER, 18, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
 
-	HORSE_FLAGS(HORSE, 16, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
-	HORSE_TYPE(HORSE, 19, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
-	HORSE_COLOR(HORSE, 20, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
-	HORSE_OWNER(HORSE, 21, EntityDataTypes1_7_6_10.STRING, EntityDataTypes1_8.STRING),
-	HORSE_ARMOR(HORSE, 22, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
+    HORSE_FLAGS(HORSE, 16, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
+    HORSE_TYPE(HORSE, 19, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
+    HORSE_COLOR(HORSE, 20, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
+    HORSE_OWNER(HORSE, 21, EntityDataTypes1_7_6_10.STRING, EntityDataTypes1_8.STRING),
+    HORSE_ARMOR(HORSE, 22, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
 
-	BAT_HANGING(BAT, 16, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
+    BAT_HANGING(BAT, 16, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
 
-	TAMABLE_ANIMAL_FLAGS(TAMABLE_ANIMAL, 16, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
-	TAMABLE_ANIMAL_OWNER(TAMABLE_ANIMAL, 17, EntityDataTypes1_7_6_10.STRING, EntityDataTypes1_8.STRING),
+    TAMABLE_ANIMAL_FLAGS(TAMABLE_ANIMAL, 16, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
+    TAMABLE_ANIMAL_OWNER(TAMABLE_ANIMAL, 17, EntityDataTypes1_7_6_10.STRING, EntityDataTypes1_8.STRING),
 
-	OCELOT_TYPE(OCELOT, 18, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
+    OCELOT_TYPE(OCELOT, 18, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
 
-	WOLF_FLAGS(WOLF, 16, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
-	WOLF_HEALTH(WOLF, 18, EntityDataTypes1_7_6_10.FLOAT, EntityDataTypes1_8.FLOAT),
-	WOLF_BEGGING(WOLF, 19, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
-	WOLF_COLLAR_COLOR(WOLF, 20, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
+    WOLF_FLAGS(WOLF, 16, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
+    WOLF_HEALTH(WOLF, 18, EntityDataTypes1_7_6_10.FLOAT, EntityDataTypes1_8.FLOAT),
+    WOLF_BEGGING(WOLF, 19, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
+    WOLF_COLLAR_COLOR(WOLF, 20, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
 
-	PIG_SADDLE(PIG, 16, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
+    PIG_SADDLE(PIG, 16, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
 
-	SHEEP_COLOR_OR_SHEARED(SHEEP, 16, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
+    SHEEP_COLOR_OR_SHEARED(SHEEP, 16, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
 
-	VILLAGER_TYPE(VILLAGER, 16, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
+    VILLAGER_TYPE(VILLAGER, 16, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
 
-	ENDERMAN_CARRIED_BLOCK(ENDERMAN, 16, null, EntityDataTypes1_8.SHORT),
-	ENDERMAN_CARRIED_BLOCK_DATA(ENDERMAN, 17, null, EntityDataTypes1_8.BYTE),
-	ENDERMAN_IS_SCREAMING(ENDERMAN, 18, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
+    ENDERMAN_CARRIED_BLOCK(ENDERMAN, 16, null, EntityDataTypes1_8.SHORT),
+    ENDERMAN_CARRIED_BLOCK_DATA(ENDERMAN, 17, null, EntityDataTypes1_8.BYTE),
+    ENDERMAN_IS_SCREAMING(ENDERMAN, 18, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
 
-	ZOMBIE_CHILD(ZOMBIE, 12, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
-	ZOMBIE_VILLAGER(ZOMBIE, 13, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
-	ZOMBIE_CONVERTING(ZOMBIE, 14, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
+    ZOMBIE_CHILD(ZOMBIE, 12, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
+    ZOMBIE_VILLAGER(ZOMBIE, 13, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
+    ZOMBIE_CONVERTING(ZOMBIE, 14, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
 
-	BLAZE_ON_FIRE(BLAZE, 16, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
+    BLAZE_ON_FIRE(BLAZE, 16, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
 
-	SPIDER_CLIMBING(SPIDER, 16, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
+    SPIDER_CLIMBING(SPIDER, 16, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
 
-	CREEPER_STATE(CREEPER, 16, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
-	CREEPER_POWERED(CREEPER, 17, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
-	CREEPER_IGNITED(CREEPER, 18, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
+    CREEPER_STATE(CREEPER, 16, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
+    CREEPER_POWERED(CREEPER, 17, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
+    CREEPER_IGNITED(CREEPER, 18, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
 
-	GHAST_STATE(GHAST, 16, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
-	GHAST_IS_POWERED(GHAST, 17, null, EntityDataTypes1_8.BYTE),
+    GHAST_STATE(GHAST, 16, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
+    GHAST_IS_POWERED(GHAST, 17, null, EntityDataTypes1_8.BYTE),
 
-	SLIME_SIZE(SLIME, 16, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
+    SLIME_SIZE(SLIME, 16, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
 
-	SKELETON_TYPE(SKELETON, 13, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
+    SKELETON_TYPE(SKELETON, 13, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
 
-	WITCH_AGGRESSIVE(WITCH, 21, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
+    WITCH_AGGRESSIVE(WITCH, 21, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
 
-	IRON_GOLEM_IS_PLAYER_CREATED(IRON_GOLEM, 16, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
+    IRON_GOLEM_IS_PLAYER_CREATED(IRON_GOLEM, 16, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
 
-	WITHER_WATCHED_TARGET_1(WITHER, 17, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
-	WITHER_WATCHED_TARGET_2(WITHER, 18, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
-	WITHER_WATCHED_TARGET_3(WITHER, 19, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
-	WITHER_INVULNERABLE_TIME(WITHER, 20, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
+    WITHER_WATCHED_TARGET_1(WITHER, 17, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
+    WITHER_WATCHED_TARGET_2(WITHER, 18, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
+    WITHER_WATCHED_TARGET_3(WITHER, 19, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
+    WITHER_INVULNERABLE_TIME(WITHER, 20, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
 
-	GUARDIAN_FLAGS(GUARDIAN, 16, null, EntityDataTypes1_8.BYTE),
-	GUARDIAN_TARGET(GUARDIAN, 17, null, EntityDataTypes1_8.INT),
+    GUARDIAN_FLAGS(GUARDIAN, 16, null, EntityDataTypes1_8.BYTE),
+    GUARDIAN_TARGET(GUARDIAN, 17, null, EntityDataTypes1_8.INT),
 
-	BOAT_TIME_SINCE_HIT(BOAT, 17, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
-	BOAT_FORWARD_DIRECTION(BOAT, 18, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
-	BOAT_DAMAGE_TAKEN(BOAT, 19, EntityDataTypes1_7_6_10.FLOAT, EntityDataTypes1_8.FLOAT),
+    BOAT_TIME_SINCE_HIT(BOAT, 17, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
+    BOAT_FORWARD_DIRECTION(BOAT, 18, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
+    BOAT_DAMAGE_TAKEN(BOAT, 19, EntityDataTypes1_7_6_10.FLOAT, EntityDataTypes1_8.FLOAT),
 
-	ABSTRACT_MINECART_SHAKING_POWER(ABSTRACT_MINECART, 17, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
-	ABSTRACT_MINECART_SHAKING_DIRECTION(ABSTRACT_MINECART, 18, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
-	ABSTRACT_MINECART_DAMAGE_TAKEN(ABSTRACT_MINECART, 19, EntityDataTypes1_7_6_10.FLOAT, EntityDataTypes1_8.FLOAT),
-	ABSTRACT_MINECART_BLOCK_INSIDE(ABSTRACT_MINECART, 20, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
-	ABSTRACT_MINECART_BLOCK_Y(ABSTRACT_MINECART, 21, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
-	ABSTRACT_MINECART_SHOW_BLOCK(ABSTRACT_MINECART, 22, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
+    ABSTRACT_MINECART_SHAKING_POWER(ABSTRACT_MINECART, 17, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
+    ABSTRACT_MINECART_SHAKING_DIRECTION(ABSTRACT_MINECART, 18, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
+    ABSTRACT_MINECART_DAMAGE_TAKEN(ABSTRACT_MINECART, 19, EntityDataTypes1_7_6_10.FLOAT, EntityDataTypes1_8.FLOAT),
+    ABSTRACT_MINECART_BLOCK_INSIDE(ABSTRACT_MINECART, 20, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
+    ABSTRACT_MINECART_BLOCK_Y(ABSTRACT_MINECART, 21, EntityDataTypes1_7_6_10.INT, EntityDataTypes1_8.INT),
+    ABSTRACT_MINECART_SHOW_BLOCK(ABSTRACT_MINECART, 22, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
 
-	FURNACE_MINECART_IS_POWERED(FURNACE_MINECART, 16, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
+    FURNACE_MINECART_IS_POWERED(FURNACE_MINECART, 16, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
 
-	ITEM_ITEM(ITEM, 10, EntityDataTypes1_7_6_10.ITEM, EntityDataTypes1_8.ITEM),
+    ITEM_ITEM(ITEM, 10, EntityDataTypes1_7_6_10.ITEM, EntityDataTypes1_8.ITEM),
 
-	ARROW_IS_CRITICAL(ARROW, 16, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
+    ARROW_IS_CRITICAL(ARROW, 16, EntityDataTypes1_7_6_10.BYTE, EntityDataTypes1_8.BYTE),
 
-	FIREWORK_ROCKET_INFO(FIREWORK_ROCKET, 8, EntityDataTypes1_7_6_10.ITEM, EntityDataTypes1_8.ITEM),
+    FIREWORK_ROCKET_INFO(FIREWORK_ROCKET, 8, EntityDataTypes1_7_6_10.ITEM, EntityDataTypes1_8.ITEM),
 
-	ITEM_FRAME_ITEM(ITEM_FRAME, 2, EntityDataTypes1_7_6_10.ITEM, 8, EntityDataTypes1_8.ITEM),
-	ITEM_FRAME_ROTATION(ITEM_FRAME, 3, EntityDataTypes1_7_6_10.BYTE, 9, EntityDataTypes1_8.BYTE),
+    ITEM_FRAME_ITEM(ITEM_FRAME, 2, EntityDataTypes1_7_6_10.ITEM, 8, EntityDataTypes1_8.ITEM),
+    ITEM_FRAME_ROTATION(ITEM_FRAME, 3, EntityDataTypes1_7_6_10.BYTE, 9, EntityDataTypes1_8.BYTE),
 
-	END_CRYSTAL_HEALTH(END_CRYSTAL, 8, EntityDataTypes1_7_6_10.INT, 9, EntityDataTypes1_8.INT);
+    END_CRYSTAL_HEALTH(END_CRYSTAL, 8, EntityDataTypes1_7_6_10.INT, 9, EntityDataTypes1_8.INT);
 
-	private static final HashMap<Pair<EntityTypes1_8.EntityType, Integer>, EntityDataIndex1_7_6_10> ENTITY_DATA_REWRITES = new HashMap<>();
+    private static final HashMap<Pair<EntityTypes1_8.EntityType, Integer>, EntityDataIndex1_7_6_10> ENTITY_DATA_REWRITES = new HashMap<>();
 
-	static {
-		for (EntityDataIndex1_7_6_10 index : EntityDataIndex1_7_6_10.values()) {
-			ENTITY_DATA_REWRITES.put(new Pair<>(index.getClazz(), index.getNewIndex()), index);
-		}
-	}
+    static {
+        for (EntityDataIndex1_7_6_10 index : EntityDataIndex1_7_6_10.values()) {
+            ENTITY_DATA_REWRITES.put(new Pair<>(index.getClazz(), index.getNewIndex()), index);
+        }
+    }
 
-	private final EntityTypes1_8.EntityType clazz;
-	private final int newIndex;
-	private final EntityDataTypes1_8 newType;
-	private final EntityDataTypes1_7_6_10 oldType;
-	private final int index;
+    private final EntityTypes1_8.EntityType clazz;
+    private final int newIndex;
+    private final EntityDataTypes1_8 newType;
+    private final EntityDataTypes1_7_6_10 oldType;
+    private final int index;
 
-	EntityDataIndex1_7_6_10(EntityTypes1_8.EntityType type, int index, EntityDataTypes1_7_6_10 oldType, EntityDataTypes1_8 newType) {
-		this.clazz = type;
-		this.index = index;
-		this.newIndex = index;
-		this.oldType = oldType;
-		this.newType = newType;
-	}
+    EntityDataIndex1_7_6_10(EntityTypes1_8.EntityType type, int index, EntityDataTypes1_7_6_10 oldType, EntityDataTypes1_8 newType) {
+        this.clazz = type;
+        this.index = index;
+        this.newIndex = index;
+        this.oldType = oldType;
+        this.newType = newType;
+    }
 
-	EntityDataIndex1_7_6_10(EntityTypes1_8.EntityType type, int index, EntityDataTypes1_7_6_10 oldType, int newIndex, EntityDataTypes1_8 newType) {
-		this.clazz = type;
-		this.index = index;
-		this.oldType = oldType;
-		this.newIndex = newIndex;
-		this.newType = newType;
-	}
+    EntityDataIndex1_7_6_10(EntityTypes1_8.EntityType type, int index, EntityDataTypes1_7_6_10 oldType, int newIndex, EntityDataTypes1_8 newType) {
+        this.clazz = type;
+        this.index = index;
+        this.oldType = oldType;
+        this.newIndex = newIndex;
+        this.newType = newType;
+    }
 
-	private static Optional<EntityDataIndex1_7_6_10> getIndex(EntityType type, int index) {
-		final Pair<EntityType, Integer> pair = new Pair<>(type, index);
-		return Optional.ofNullable(ENTITY_DATA_REWRITES.get(pair));
-	}
+    private static Optional<EntityDataIndex1_7_6_10> getIndex(EntityType type, int index) {
+        final Pair<EntityType, Integer> pair = new Pair<>(type, index);
+        return Optional.ofNullable(ENTITY_DATA_REWRITES.get(pair));
+    }
 
-	public EntityTypes1_8.EntityType getClazz() {
-		return clazz;
-	}
+    public static EntityDataIndex1_7_6_10 searchIndex(EntityType type, int index) {
+        EntityType currentType = type;
+        do {
+            Optional<EntityDataIndex1_7_6_10> optMeta = getIndex(currentType, index);
 
-	public int getNewIndex() {
-		return newIndex;
-	}
+            if (optMeta.isPresent()) {
+                return optMeta.get();
+            }
 
-	public EntityDataTypes1_8 getNewType() {
-		return newType;
-	}
+            currentType = currentType.getParent();
+        } while (currentType != null);
 
-	public EntityDataTypes1_7_6_10 getOldType() {
-		return oldType;
-	}
+        return null;
+    }
 
-	public int getIndex() {
-		return index;
-	}
+    public EntityTypes1_8.EntityType getClazz() {
+        return clazz;
+    }
 
-	public static EntityDataIndex1_7_6_10 searchIndex(EntityType type, int index) {
-		EntityType currentType = type;
-		do {
-			Optional<EntityDataIndex1_7_6_10> optMeta = getIndex(currentType, index);
+    public int getNewIndex() {
+        return newIndex;
+    }
 
-			if (optMeta.isPresent()) {
-				return optMeta.get();
-			}
+    public EntityDataTypes1_8 getNewType() {
+        return newType;
+    }
 
-			currentType = currentType.getParent();
-		} while (currentType != null);
+    public EntityDataTypes1_7_6_10 getOldType() {
+        return oldType;
+    }
 
-		return null;
-	}
-}
+    public int getIndex() {
+        return index;
+    }
+}

common/src/main/java/com/viaversion/viarewind/protocol/v1_8to1_7_6_10/data/Particles1_8.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -20,77 +20,78 @@ package com.viaversion.viarewind.protocol.v1_8to1_7_6_10.data;
 import java.util.HashMap;
 
 public enum Particles1_8 {
-	EXPLOSION_NORMAL("explode"),
-	EXPLOSION_LARGE("largeexplode"),
-	EXPLOSION_HUGE("hugeexplosion"),
-	FIREWORKS_SPARK("fireworksSpark"),
-	WATER_BUBBLE("bubble"),
-	WATER_SPLASH("splash"),
-	WATER_WAKE("wake"),
-	SUSPENDED("suspended"),
-	SUSPENDED_DEPTH("depthsuspend"),
-	CRIT("crit"),
-	CRIT_MAGIC("magicCrit"),
-	SMOKE_NORMAL("smoke"),
-	SMOKE_LARGE("largesmoke"),
-	SPELL("spell"),
-	SPELL_INSTANT("instantSpell"),
-	SPELL_MOB("mobSpell"),
-	SPELL_MOB_AMBIENT("mobSpellAmbient"),
-	SPELL_WITCH("witchMagic"),
-	DRIP_WATER("dripWater"),
-	DRIP_LAVA("dripLava"),
-	VILLAGER_ANGRY("angryVillager"),
-	VILLAGER_HAPPY("happyVillager"),
-	TOWN_AURA("townaura"),
-	NOTE("note"),
-	PORTAL("portal"),
-	ENCHANTMENT_TABLE("enchantmenttable"),
-	FLAME("flame"),
-	LAVA("lava"),
-	FOOTSTEP("footstep"),
-	CLOUD("cloud"),
-	REDSTONE("reddust"),
-	SNOWBALL("snowballpoof"),
-	SNOW_SHOVEL("snowshovel"),
-	SLIME("slime"),
-	HEART("heart"),
-	BARRIER("barrier"),
-	ICON_CRACK("iconcrack", 2),
-	BLOCK_CRACK("blockcrack", 1),
-	BLOCK_DUST("blockdust", 1),
-	WATER_DROP("droplet"),
-	ITEM_TAKE("take"),
-	MOB_APPEARANCE("mobappearance");
+    EXPLOSION_NORMAL("explode"),
+    EXPLOSION_LARGE("largeexplode"),
+    EXPLOSION_HUGE("hugeexplosion"),
+    FIREWORKS_SPARK("fireworksSpark"),
+    WATER_BUBBLE("bubble"),
+    WATER_SPLASH("splash"),
+    WATER_WAKE("wake"),
+    SUSPENDED("suspended"),
+    SUSPENDED_DEPTH("depthsuspend"),
+    CRIT("crit"),
+    CRIT_MAGIC("magicCrit"),
+    SMOKE_NORMAL("smoke"),
+    SMOKE_LARGE("largesmoke"),
+    SPELL("spell"),
+    SPELL_INSTANT("instantSpell"),
+    SPELL_MOB("mobSpell"),
+    SPELL_MOB_AMBIENT("mobSpellAmbient"),
+    SPELL_WITCH("witchMagic"),
+    DRIP_WATER("dripWater"),
+    DRIP_LAVA("dripLava"),
+    VILLAGER_ANGRY("angryVillager"),
+    VILLAGER_HAPPY("happyVillager"),
+    TOWN_AURA("townaura"),
+    NOTE("note"),
+    PORTAL("portal"),
+    ENCHANTMENT_TABLE("enchantmenttable"),
+    FLAME("flame"),
+    LAVA("lava"),
+    FOOTSTEP("footstep"),
+    CLOUD("cloud"),
+    REDSTONE("reddust"),
+    SNOWBALL("snowballpoof"),
+    SNOW_SHOVEL("snowshovel"),
+    SLIME("slime"),
+    HEART("heart"),
+    BARRIER("barrier"),
+    ICON_CRACK("iconcrack", 2),
+    BLOCK_CRACK("blockcrack", 1),
+    BLOCK_DUST("blockdust", 1),
+    WATER_DROP("droplet"),
+    ITEM_TAKE("take"),
+    MOB_APPEARANCE("mobappearance");
 
-	public final String name;
-	public final int extra;
-	private static final HashMap<String, Particles1_8> particleMap = new HashMap<>();
+    private static final HashMap<String, Particles1_8> particleMap = new HashMap<>();
 
-	Particles1_8(String name) {
-		this(name, 0);
-	}
+    static {
+        Particles1_8[] particles = values();
 
-	Particles1_8(String name, int extra) {
-		this.name = name;
-		this.extra = extra;
-	}
+        for (Particles1_8 particle : particles) {
+            particleMap.put(particle.name, particle);
+        }
+    }
 
-	public static Particles1_8 find(String part) {
-		return particleMap.get(part);
-	}
+    public final String name;
+    public final int extra;
 
-	public static Particles1_8 find(int id) {
-		if (id < 0) return null;
-		Particles1_8[] values = Particles1_8.values();
-		return id >= values.length ? null : values[id];
-	}
+    Particles1_8(String name) {
+        this(name, 0);
+    }
 
-	static {
-		Particles1_8[] particles = values();
+    Particles1_8(String name, int extra) {
+        this.name = name;
+        this.extra = extra;
+    }
 
-		for (Particles1_8 particle : particles) {
-			particleMap.put(particle.name, particle);
-		}
-	}
-}
+    public static Particles1_8 find(String part) {
+        return particleMap.get(part);
+    }
+
+    public static Particles1_8 find(int id) {
+        if (id < 0) return null;
+        Particles1_8[] values = Particles1_8.values();
+        return id >= values.length ? null : values[id];
+    }
+}

common/src/main/java/com/viaversion/viarewind/protocol/v1_8to1_7_6_10/data/VirtualHologramEntity.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -24,6 +24,7 @@ import com.viaversion.viarewind.api.type.RewindTypes;
 import com.viaversion.viarewind.protocol.v1_7_6_10to1_7_2_5.packet.ClientboundPackets1_7_2_5;
 import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.Protocol1_8To1_7_6_10;
 import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.rewriter.EntityPacketRewriter1_8;
+import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.storage.EntityTracker1_8;
 import com.viaversion.viaversion.api.connection.UserConnection;
 import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8;
 import com.viaversion.viaversion.api.minecraft.entitydata.EntityData;
@@ -46,8 +47,13 @@ public class VirtualHologramEntity {
     private String name = null;
     private float yaw, pitch;
     private float headYaw;
+    private byte flags = 0;
+    private byte armorStandFlags = 0;
     private boolean small = false;
     private boolean marker = false;
+    private boolean sneaking = false;
+    private boolean gravity = false;
+    private byte alwaysShowNametag;
 
     public VirtualHologramEntity(final UserConnection user, final int entityId) {
         this.user = user;
@@ -60,7 +66,7 @@ public class VirtualHologramEntity {
         this.locY = y;
         this.locZ = z;
 
-        updateLocation(false);
+        updateLocation();
     }
 
     public void setRelativePosition(final double x, final double y, final double z) {
@@ -69,7 +75,7 @@ public class VirtualHologramEntity {
         this.locY += y;
         this.locZ += z;
 
-        updateLocation(false);
+        updateLocation();
     }
 
     public void setRotation(final float yaw, final float pitch) {
@@ -78,14 +84,14 @@ public class VirtualHologramEntity {
         this.headYaw = yaw;
         this.pitch = pitch;
 
-        updateLocation(false);
+        updateLocation();
     }
 
     public void setHeadYaw(float yaw) {
         if (this.headYaw == yaw) return;
         this.headYaw = yaw;
 
-        updateLocation(false);
+        updateLocation();
     }
 
     public void syncState(final EntityPacketRewriter1_8 entityRewriter, final List<EntityData> entityDataList) {
@@ -96,27 +102,31 @@ public class VirtualHologramEntity {
         }
 
         // Filter armor stand data to calculate emulation
-        byte flags = 0;
-        byte armorStandFlags = 0;
         for (EntityData entityData : entityDataTracker) {
             if (entityData.id() == 0 && entityData.dataType() == EntityDataTypes1_8.BYTE) {
                 flags = ((Number) entityData.getValue()).byteValue();
             } else if (entityData.id() == 2 && entityData.dataType() == EntityDataTypes1_8.STRING) {
                 name = entityData.getValue().toString();
                 if (name != null && name.isEmpty()) name = null;
+            } else if (entityData.id() == 3 && entityData.dataType() == EntityDataTypes1_8.BYTE) {
+                alwaysShowNametag = ((Number) entityData.getValue()).byteValue();
             } else if (entityData.id() == 10 && entityData.dataType() == EntityDataTypes1_8.BYTE) {
                 armorStandFlags = ((Number) entityData.getValue()).byteValue();
             }
         }
         final boolean invisible = (flags & 0x20) != 0;
+        sneaking = (flags & 0x02) != 0;
         small = (armorStandFlags & 0x01) != 0;
         marker = (armorStandFlags & 0x10) != 0;
+        gravity = (armorStandFlags & 0x02) == 0;
 
         State prevState = currentState;
-        if (invisible && name != null) {
+        if (invisible && name != null && alwaysShowNametag == 1) {
             currentState = State.HOLOGRAM;
-        } else {
+        } else if (gravity) {
             currentState = State.ZOMBIE;
+        } else {
+            currentState = State.ZOMBIE_NO_GRAVITY;
         }
 
         if (currentState != prevState) {
@@ -124,11 +134,11 @@ public class VirtualHologramEntity {
             sendSpawnPacket(entityRewriter);
         } else {
             sendEntityDataUpdate(entityRewriter);
-            updateLocation(false);
+            updateLocation();
         }
     }
 
-    private void updateLocation(final boolean remount) {
+    private void updateLocation() {
         if (entityIds == null) {
             return;
         }
@@ -141,27 +151,37 @@ public class VirtualHologramEntity {
             entityHeadLook.write(Types.BYTE, (byte) ((headYaw / 360f) * 256));
 
             entityHeadLook.send(Protocol1_8To1_7_6_10.class);
-        } else if (currentState == State.HOLOGRAM) {
-            if (remount) {
-                PacketWrapper detach = PacketWrapper.create(ClientboundPackets1_7_2_5.SET_ENTITY_LINK, user);
-                detach.write(Types.INT, entityIds[1]);
-                detach.write(Types.INT, -1);
-                detach.write(Types.BOOLEAN, false);
-                detach.send(Protocol1_8To1_7_6_10.class);
-            }
-
+        } else if (currentState == State.HOLOGRAM || currentState == State.ZOMBIE_NO_GRAVITY) {
             // Don't ask me where this offset is coming from
-            teleportEntity(entityIds[0], locX, (locY + (marker ? 54.3625 : small ? 56 : 57) - 0.16), locZ, 0, 0); // Skull
+            teleportEntity(entityIds[1], locX, (locY + getOffset()), locZ, 0, 0); // Squid
+        }
+    }
 
-            if (remount) {
-                teleportEntity(entityIds[1], locX, locY + 56.75, locZ, 0, 0); // Horse
+    private double getOffset() {
+        if (currentState == State.HOLOGRAM) {
+            double baseOffset = 54.35;
 
-                PacketWrapper attach = PacketWrapper.create(ClientboundPackets1_7_2_5.SET_ENTITY_LINK, null, user);
-                attach.write(Types.INT, entityIds[1]);
-                attach.write(Types.INT, entityIds[0]);
-                attach.write(Types.BOOLEAN, false);
-                attach.send(Protocol1_8To1_7_6_10.class);
+            if (marker) {
+                return baseOffset;
+            } else if (small) {
+                return baseOffset + 0.9875;
+            } else {
+                return baseOffset + (0.9875 * 2);
             }
+        } else if (currentState == State.ZOMBIE_NO_GRAVITY) {
+            // 1.7 ride stack offset sum: Squid (0.95 * 0.75) + Zombie (1.8 * 0.75) = 2.0625
+            // By starting at -2.0625, we zero out the 1.7 passenger height so we can apply 1.8's offsets.
+            double baseOffset = -2.0625;
+
+            if (marker) {
+                // 1.8 Marker ArmorStand height is 0.0 -> mounted offset 0.0
+                return baseOffset;
+            } else {
+                // 1.8 Normal ArmorStand height is 1.975 -> mounted offset 1.975 * 0.75 = 1.48125
+                return baseOffset + 1.48125;
+            }
+        } else {
+            return -0.4;
         }
     }
 
@@ -203,7 +223,7 @@ public class VirtualHologramEntity {
         }
         final PacketWrapper setEntityData = PacketWrapper.create(ClientboundPackets1_7_2_5.SET_ENTITY_DATA, user);
 
-        if (currentState == State.ZOMBIE) {
+        if (currentState == State.ZOMBIE || currentState == State.ZOMBIE_NO_GRAVITY) {
             writeZombieMeta(entityRewriter, setEntityData);
         } else if (currentState == State.HOLOGRAM) {
             writeHologramMeta(setEntityData);
@@ -247,13 +267,14 @@ public class VirtualHologramEntity {
     }
 
     private void writeHologramMeta(PacketWrapper wrapper) {
-        wrapper.write(Types.INT, entityIds[1]);
+        wrapper.write(Types.INT, entityIds[0]);
 
         // Directly write 1.7 entity data here since we are making them up
         final List<EntityData> entityDataList = new ArrayList<>();
+        entityDataList.add(new EntityData(EntityDataIndex1_7_6_10.ENTITY_FLAGS.getIndex(), EntityDataTypes1_7_6_10.BYTE, (byte) (sneaking ? 2 : 0)));
         entityDataList.add(new EntityData(EntityDataIndex1_7_6_10.ABSTRACT_AGEABLE_AGE.getIndex(), EntityDataTypes1_7_6_10.INT, -1700000));
         entityDataList.add(new EntityData(EntityDataIndex1_7_6_10.LIVING_ENTITY_BASE_NAME_TAG.getIndex(), EntityDataTypes1_7_6_10.STRING, name));
-        entityDataList.add(new EntityData(EntityDataIndex1_7_6_10.LIVING_ENTITY_BASE_NAME_TAG_VISIBILITY.getIndex(), EntityDataTypes1_7_6_10.BYTE, (byte) 1));
+        entityDataList.add(new EntityData(EntityDataIndex1_7_6_10.LIVING_ENTITY_BASE_NAME_TAG_VISIBILITY.getIndex(), EntityDataTypes1_7_6_10.BYTE, alwaysShowNametag));
 
         wrapper.write(RewindTypes.ENTITY_DATA_LIST1_7, entityDataList);
     }
@@ -266,31 +287,45 @@ public class VirtualHologramEntity {
             spawnEntity(entityId, EntityTypes1_8.EntityType.ZOMBIE.getId(), locX, locY, locZ, new ArrayList<>());
 
             entityIds = new int[]{entityId};
-        } else if (currentState == State.HOLOGRAM) {
+        } else if (currentState == State.ZOMBIE_NO_GRAVITY || currentState == State.HOLOGRAM) {
             final int[] entityIds = {entityId, additionalEntityId()};
 
-            final PacketWrapper spawnSkull = PacketWrapper.create(ClientboundPackets1_7_2_5.ADD_ENTITY, user);
-            spawnSkull.write(Types.VAR_INT, entityIds[0]);
-            spawnSkull.write(Types.BYTE, (byte) 66);
-            spawnSkull.write(Types.INT, (int) (locX * 32.0));
-            spawnSkull.write(Types.INT, (int) (locY * 32.0));
-            spawnSkull.write(Types.INT, (int) (locZ * 32.0));
-            spawnSkull.write(Types.BYTE, (byte) 0);
-            spawnSkull.write(Types.BYTE, (byte) 0);
-            spawnSkull.write(Types.INT, 0);
-            spawnSkull.send(Protocol1_8To1_7_6_10.class);
-
             final List<EntityData> squidEntityData = new ArrayList<>();
             squidEntityData.add(new EntityData(0, EntityDataTypes1_8.BYTE, (byte) 32));
 
-            spawnEntity(entityIds[0], EntityTypes1_8.EntityType.SQUID.getId(), locX, locY, locZ, squidEntityData);
-            spawnEntity(entityIds[1], EntityTypes1_8.EntityType.HORSE.getId(), locX, locY, locZ, new ArrayList<>());
+            if (currentState == State.HOLOGRAM) {
+                spawnEntity(entityIds[0], EntityTypes1_8.EntityType.HORSE.getId(), locX, locY + (getOffset() + 0.68), locZ, new ArrayList<>());
+            } else {
+                spawnEntity(entityIds[0], EntityTypes1_8.EntityType.ZOMBIE.getId(), locX, locY, locZ, new ArrayList<>());
+            }
+
+            spawnEntity(entityIds[1], EntityTypes1_8.EntityType.SQUID.getId(), locX, locY + getOffset(), locZ, squidEntityData);
 
             this.entityIds = entityIds;
         }
 
+        for (int extraId : entityIds) {
+            if (extraId != entityId) {
+                ((EntityTracker1_8) user.getEntityTracker(Protocol1_8To1_7_6_10.class)).setExtraHologramId(entityId, extraId);
+            }
+        }
+
+
         sendEntityDataUpdate(entityRewriter);
-        updateLocation(true);
+        if (entityIds == null) {
+            return;
+        }
+
+        if (currentState == State.ZOMBIE) {
+            updateLocation();
+        } else {
+            final PacketWrapper attach = PacketWrapper.create(ClientboundPackets1_7_2_5.SET_ENTITY_LINK, user);
+            attach.write(Types.INT, entityIds[0]);
+            attach.write(Types.INT, entityIds[1]);
+            attach.write(Types.BOOLEAN, false);
+
+            attach.send(Protocol1_8To1_7_6_10.class);
+        }
     }
 
     public AABB getBoundingBox() {
@@ -311,6 +346,13 @@ public class VirtualHologramEntity {
         if (entityIds == null) {
             return;
         }
+
+        for (int extraId : entityIds) {
+            if (extraId != entityId) {
+                ((EntityTracker1_8) user.getEntityTracker(Protocol1_8To1_7_6_10.class)).removeExtraHologramId(extraId);
+            }
+        }
+
         final PacketWrapper despawn = PacketWrapper.create(ClientboundPackets1_7_2_5.REMOVE_ENTITIES, user);
         despawn.write(Types.BYTE, (byte) entityIds.length);
         for (int id : entityIds) {
@@ -321,6 +363,6 @@ public class VirtualHologramEntity {
     }
 
     private enum State {
-        HOLOGRAM, ZOMBIE
+        HOLOGRAM, ZOMBIE, ZOMBIE_NO_GRAVITY
     }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_8to1_7_6_10/provider/CompressionHandlerProvider.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -20,21 +20,19 @@ package com.viaversion.viarewind.protocol.v1_8to1_7_6_10.provider;
 import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.storage.CompressionStatusTracker;
 import com.viaversion.viaversion.api.connection.UserConnection;
 import com.viaversion.viaversion.api.platform.providers.Provider;
-import io.netty.channel.ChannelHandler;
 
 public abstract class CompressionHandlerProvider implements Provider {
 
-	public abstract void onHandleLoginCompressionPacket(UserConnection user, int threshold);
-	public abstract void onTransformPacket(UserConnection user);
+    public abstract void setCompressionThreshold(UserConnection user, int threshold);
 
-	public abstract ChannelHandler getEncoder(int threshold);
-	public abstract ChannelHandler getDecoder(int threshold);
+    public abstract void onTransformPacket(UserConnection user);
 
-	public boolean isCompressionEnabled(UserConnection user) {
-		return user.get(CompressionStatusTracker.class).removeCompression;
-	}
 
-	public void setCompressionEnabled(UserConnection user, boolean enabled) {
-		user.get(CompressionStatusTracker.class).removeCompression = enabled;
-	}
+    public boolean isRemoveCompression(UserConnection user) {
+        return user.get(CompressionStatusTracker.class).removeCompression;
+    }
+
+    public void setRemoveCompression(UserConnection user, boolean enabled) {
+        user.get(CompressionStatusTracker.class).removeCompression = enabled;
+    }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_8to1_7_6_10/provider/TitleRenderProvider.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -18,7 +18,6 @@
 package com.viaversion.viarewind.protocol.v1_8to1_7_6_10.provider;
 
 import com.viaversion.viaversion.api.platform.providers.Provider;
-
 import java.util.HashMap;
 import java.util.Map;
 import java.util.UUID;
@@ -26,74 +25,74 @@ import java.util.concurrent.atomic.AtomicInteger;
 
 // TODO I believe this should be a storage?
 public abstract class TitleRenderProvider implements Provider {
-	protected Map<UUID, Integer> fadeIn = new HashMap<>();
-	protected Map<UUID, Integer> stay = new HashMap<>();
-	protected Map<UUID, Integer> fadeOut = new HashMap<>();
-	protected Map<UUID, String> titles = new HashMap<>();
-	protected Map<UUID, String> subTitles = new HashMap<>();
-	protected Map<UUID, AtomicInteger> times = new HashMap<>();
+    protected Map<UUID, Integer> fadeIn = new HashMap<>();
+    protected Map<UUID, Integer> stay = new HashMap<>();
+    protected Map<UUID, Integer> fadeOut = new HashMap<>();
+    protected Map<UUID, String> titles = new HashMap<>();
+    protected Map<UUID, String> subTitles = new HashMap<>();
+    protected Map<UUID, AtomicInteger> times = new HashMap<>();
 
-	public void setTimings(UUID uuid, int fadeIn, int stay, int fadeOut) {
-		setFadeIn(uuid, fadeIn);
-		setStay(uuid, stay);
-		setFadeOut(uuid, fadeOut);
+    public void setTimings(UUID uuid, int fadeIn, int stay, int fadeOut) {
+        setFadeIn(uuid, fadeIn);
+        setStay(uuid, stay);
+        setFadeOut(uuid, fadeOut);
 
-		AtomicInteger time = getTime(uuid);
-		if (time.get() > 0) time.set(getFadeIn(uuid) + getStay(uuid) + getFadeOut(uuid));
-	}
+        AtomicInteger time = getTime(uuid);
+        if (time.get() > 0) time.set(getFadeIn(uuid) + getStay(uuid) + getFadeOut(uuid));
+    }
 
-	public void reset(UUID uuid) {
-		this.titles.remove(uuid);
-		this.subTitles.remove(uuid);
-		getTime(uuid).set(0);
-		fadeIn.remove(uuid);
-		stay.remove(uuid);
-		fadeOut.remove(uuid);
-	}
+    public void reset(UUID uuid) {
+        this.titles.remove(uuid);
+        this.subTitles.remove(uuid);
+        getTime(uuid).set(0);
+        fadeIn.remove(uuid);
+        stay.remove(uuid);
+        fadeOut.remove(uuid);
+    }
 
-	public void setTitle(UUID uuid, String title) {
-		this.titles.put(uuid, title);
-		getTime(uuid).set(getFadeIn(uuid) + getStay(uuid) + getFadeOut(uuid));
-	}
+    public void setTitle(UUID uuid, String title) {
+        this.titles.put(uuid, title);
+        getTime(uuid).set(getFadeIn(uuid) + getStay(uuid) + getFadeOut(uuid));
+    }
 
-	public void setSubTitle(UUID uuid, String subTitle) {
-		this.subTitles.put(uuid, subTitle);
-	}
+    public void setSubTitle(UUID uuid, String subTitle) {
+        this.subTitles.put(uuid, subTitle);
+    }
 
-	public void clear(UUID uuid) {
-		this.titles.remove(uuid);
-		this.subTitles.remove(uuid);
-		getTime(uuid).set(0);
-	}
+    public void clear(UUID uuid) {
+        this.titles.remove(uuid);
+        this.subTitles.remove(uuid);
+        getTime(uuid).set(0);
+    }
 
-	public AtomicInteger getTime(UUID uuid) {
-		return times.computeIfAbsent(uuid, key -> new AtomicInteger(0));
-	}
+    public AtomicInteger getTime(UUID uuid) {
+        return times.computeIfAbsent(uuid, key -> new AtomicInteger(0));
+    }
 
-	public int getFadeIn(UUID uuid) {
-		return fadeIn.getOrDefault(uuid, 10);
-	}
+    public int getFadeIn(UUID uuid) {
+        return fadeIn.getOrDefault(uuid, 10);
+    }
 
-	public int getStay(UUID uuid) {
-		return stay.getOrDefault(uuid, 70);
-	}
+    public int getStay(UUID uuid) {
+        return stay.getOrDefault(uuid, 70);
+    }
 
-	public int getFadeOut(UUID uuid) {
-		return fadeOut.getOrDefault(uuid, 20);
-	}
+    public int getFadeOut(UUID uuid) {
+        return fadeOut.getOrDefault(uuid, 20);
+    }
 
-	public void setFadeIn(UUID uuid, int fadeIn) {
-		if (fadeIn >= 0) this.fadeIn.put(uuid, fadeIn);
-		else this.fadeIn.remove(uuid);
-	}
+    public void setFadeIn(UUID uuid, int fadeIn) {
+        if (fadeIn >= 0) this.fadeIn.put(uuid, fadeIn);
+        else this.fadeIn.remove(uuid);
+    }
 
-	public void setStay(UUID uuid, int stay) {
-		if (stay >= 0) this.stay.put(uuid, stay);
-		else this.stay.remove(uuid);
-	}
+    public void setStay(UUID uuid, int stay) {
+        if (stay >= 0) this.stay.put(uuid, stay);
+        else this.stay.remove(uuid);
+    }
 
-	public void setFadeOut(UUID uuid, int fadeOut) {
-		if (fadeOut >= 0) this.fadeOut.put(uuid, fadeOut);
-		else this.fadeOut.remove(uuid);
-	}
+    public void setFadeOut(UUID uuid, int fadeOut) {
+        if (fadeOut >= 0) this.fadeOut.put(uuid, fadeOut);
+        else this.fadeOut.remove(uuid);
+    }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_8to1_7_6_10/provider/compression/CompressionDecoder.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -17,56 +17,51 @@
  */
 package com.viaversion.viarewind.protocol.v1_8to1_7_6_10.provider.compression;
 
+import com.viaversion.viarewind.api.compression.ThreadLocalCompressionProvider;
 import com.viaversion.viaversion.api.type.Types;
 import io.netty.buffer.ByteBuf;
-import io.netty.buffer.ByteBufAllocator;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.handler.codec.DecoderException;
 import io.netty.handler.codec.MessageToMessageDecoder;
-
 import java.util.List;
-import java.util.zip.Inflater;
 
 public class CompressionDecoder extends MessageToMessageDecoder<ByteBuf> {
-	private final Inflater inflater = new Inflater();
 
-	private final int threshold;
+    private int threshold;
 
-	public CompressionDecoder(final int threshold) {
-		this.threshold = threshold;
-	}
+    public CompressionDecoder(final int threshold) {
+        this.threshold = threshold;
+    }
 
-	@Override
-	protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
-		if (!in.isReadable()) return;
+    public void setThreshold(final int threshold) {
+        this.threshold = threshold;
+    }
 
-		int outLength = Types.VAR_INT.readPrimitive(in);
-		if (outLength == 0) {
-			out.add(in.readBytes(in.readableBytes()));
-			return;
-		}
+    @Override
+    protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
+        if (!in.isReadable()) {
+            return;
+        }
 
-		if (outLength < this.threshold) {
-			throw new DecoderException("Badly compressed packet - size of " + outLength + " is below server threshold of " + this.threshold);
-		} else if (outLength > 2097152) {
-			throw new DecoderException("Badly compressed packet - size of " + outLength + " is larger than protocol maximum of " + 2097152);
-		}
+        int outLength = Types.VAR_INT.readPrimitive(in);
+        if (outLength == 0) {
+            out.add(in.readBytes(in.readableBytes()));
+            return;
+        }
+
+        if (outLength < this.threshold) {
+            throw new DecoderException("Badly compressed packet - size of " + outLength + " is below server threshold of " + this.threshold);
+        } else if (outLength > 2097152) {
+            throw new DecoderException("Badly compressed packet - size of " + outLength + " is larger than protocol maximum of " + 2097152);
+        }
+
+        ByteBuf output = ctx.alloc().buffer(outLength);
+        try {
+            ThreadLocalCompressionProvider.inflate(in, output, outLength);
+            out.add(output.retain());
+        } finally {
+            output.release();
+        }
+    }
 
-		ByteBuf temp = in;
-		if (!in.hasArray()) {
-			temp = ByteBufAllocator.DEFAULT.heapBuffer().writeBytes(in);
-		} else {
-			in.retain();
-		}
-		ByteBuf output = ByteBufAllocator.DEFAULT.heapBuffer(outLength, outLength);
-		try {
-			this.inflater.setInput(temp.array(), temp.arrayOffset() + temp.readerIndex(), temp.readableBytes());
-			output.writerIndex(output.writerIndex() + this.inflater.inflate(output.array(), output.arrayOffset(), outLength));
-			out.add(output.retain());
-		} finally {
-			output.release();
-			temp.release();
-			this.inflater.reset();
-		}
-	}
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_8to1_7_6_10/provider/compression/CompressionEncoder.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -17,54 +17,35 @@
  */
 package com.viaversion.viarewind.protocol.v1_8to1_7_6_10.provider.compression;
 
+import com.viaversion.viarewind.api.compression.ThreadLocalCompressionProvider;
 import com.viaversion.viaversion.api.type.Types;
 import io.netty.buffer.ByteBuf;
-import io.netty.buffer.ByteBufAllocator;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.handler.codec.MessageToByteEncoder;
 
-import java.util.zip.Deflater;
-
 public class CompressionEncoder extends MessageToByteEncoder<ByteBuf> {
-	private final Deflater deflater = new Deflater();
 
-	private final int threshold;
+    private int threshold;
 
-	public CompressionEncoder(final int threshold) {
-		this.threshold = threshold;
-	}
+    public CompressionEncoder(final int threshold) {
+        this.threshold = threshold;
+    }
 
-	@Override
-	protected void encode(ChannelHandlerContext ctx, ByteBuf in, ByteBuf out) throws Exception {
-		int frameLength = in.readableBytes();
-		if (frameLength < this.threshold) {
-			out.writeByte(0); // VarInt
-			out.writeBytes(in);
-			return;
-		}
+    public void setThreshold(final int threshold) {
+        this.threshold = threshold;
+    }
 
-		Types.VAR_INT.writePrimitive(out, frameLength);
+    @Override
+    protected void encode(ChannelHandlerContext ctx, ByteBuf in, ByteBuf out) throws Exception {
+        int frameLength = in.readableBytes();
+        if (frameLength < this.threshold) {
+            out.writeByte(0); // VarInt
+            out.writeBytes(in);
+            return;
+        }
 
-		ByteBuf temp = in;
-		if (!in.hasArray()) {
-			temp = ByteBufAllocator.DEFAULT.heapBuffer().writeBytes(in);
-		} else {
-			in.retain();
-		}
-		ByteBuf output = ByteBufAllocator.DEFAULT.heapBuffer();
-		try {
-			this.deflater.setInput(temp.array(), temp.arrayOffset() + temp.readerIndex(), temp.readableBytes());
-			deflater.finish();
+        Types.VAR_INT.writePrimitive(out, frameLength);
+        ThreadLocalCompressionProvider.deflate(in, out);
+    }
 
-			while (!deflater.finished()) {
-				output.ensureWritable(4096);
-				output.writerIndex(output.writerIndex() + this.deflater.deflate(output.array(), output.arrayOffset() + output.writerIndex(), output.writableBytes()));
-			}
-			out.writeBytes(output);
-		} finally {
-			output.release();
-			temp.release();
-			this.deflater.reset();
-		}
-	}
-}
+}

common/src/main/java/com/viaversion/viarewind/protocol/v1_8to1_7_6_10/provider/compression/TrackingCompressionHandlerProvider.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -23,52 +23,57 @@ import com.viaversion.viarewind.api.minecraft.netty.ForwardMessageToByteEncoder;
 import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.provider.CompressionHandlerProvider;
 import com.viaversion.viaversion.api.Via;
 import com.viaversion.viaversion.api.connection.UserConnection;
-import io.netty.channel.ChannelHandler;
 import io.netty.channel.ChannelPipeline;
 
 public class TrackingCompressionHandlerProvider extends CompressionHandlerProvider {
 
-	@Override
-	public void onHandleLoginCompressionPacket(UserConnection user, int threshold) {
-		final ChannelPipeline pipeline = user.getChannel().pipeline();
-		if (user.isClientSide()) {
-			pipeline.addBefore(Via.getManager().getInjector().getEncoderName(), ViaRewind.getPlatform().compressHandlerName(), getEncoder(threshold));
-			pipeline.addBefore(Via.getManager().getInjector().getDecoderName(), ViaRewind.getPlatform().decompressHandlerName(), getDecoder(threshold));
-		} else {
-			setCompressionEnabled(user, true); // We need to remove compression for 1.7 clients
-		}
-	}
+    @Override
+    public void setCompressionThreshold(UserConnection user, int threshold) {
+        final ChannelPipeline pipeline = user.getChannel().pipeline();
+        if (!user.isClientSide() || threshold < 0) {
+            setRemoveCompression(user, true); // We need to remove compression for 1.7 clients
+            return;
+        }
 
-	@Override
-	public void onTransformPacket(UserConnection user) {
-		if (isCompressionEnabled(user)) {
-			final ChannelPipeline pipeline = user.getChannel().pipeline();
+        final String compressHandlerName = ViaRewind.getPlatform().compressHandlerName();
+        final CompressionEncoder encoder = (CompressionEncoder) pipeline.get(compressHandlerName);
+        if (encoder != null) {
+            encoder.setThreshold(threshold);
+        } else {
+            pipeline.addBefore(Via.getManager().getInjector().getEncoderName(), compressHandlerName, new CompressionEncoder(threshold));
+        }
 
-			String compressor = null;
-			String decompressor = null;
-			if (pipeline.get(ViaRewind.getPlatform().compressHandlerName()) != null) {
-				compressor = ViaRewind.getPlatform().compressHandlerName();
-				decompressor = ViaRewind.getPlatform().decompressHandlerName();
-			}
+        final String decompressHandlerName = ViaRewind.getPlatform().decompressHandlerName();
+        final CompressionDecoder decoder = (CompressionDecoder) pipeline.get(decompressHandlerName);
+        if (decoder != null) {
+            decoder.setThreshold(threshold);
+        } else {
+            pipeline.addBefore(Via.getManager().getInjector().getDecoderName(), decompressHandlerName, new CompressionDecoder(threshold));
+        }
+    }
 
-			if (compressor != null) { // We can neutralize the effect of compressor to the client
-				pipeline.replace(decompressor, decompressor, new EmptyChannelHandler());
-				pipeline.replace(compressor, compressor, new ForwardMessageToByteEncoder());
-			} else {
-				throw new IllegalStateException("Couldn't remove compression for 1.7!");
-			}
+    @Override
+    public void onTransformPacket(UserConnection user) {
+        if (isRemoveCompression(user)) {
+            final ChannelPipeline pipeline = user.getChannel().pipeline();
 
-			setCompressionEnabled(user, false);
-		}
-	}
+            String compressor = null;
+            String decompressor = null;
+            if (pipeline.get(ViaRewind.getPlatform().compressHandlerName()) != null) {
+                compressor = ViaRewind.getPlatform().compressHandlerName();
+                decompressor = ViaRewind.getPlatform().decompressHandlerName();
+            }
+
+            if (compressor != null) { // We can neutralize the effect of compressor to the client
+                pipeline.replace(decompressor, decompressor, new EmptyChannelHandler());
+                pipeline.replace(compressor, compressor, new ForwardMessageToByteEncoder());
+            } else {
+                throw new IllegalStateException("Couldn't remove compression for 1.7!");
+            }
+
+            setRemoveCompression(user, false);
+        }
+    }
 
-	@Override
-	public ChannelHandler getEncoder(int threshold) {
-		return new CompressionEncoder(threshold);
-	}
 
-	@Override
-	public ChannelHandler getDecoder(int threshold) {
-		return new CompressionDecoder(threshold);
-	}
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_8to1_7_6_10/rewriter/BlockItemPacketRewriter1_8.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -17,304 +17,305 @@
  */
 package com.viaversion.viarewind.protocol.v1_8to1_7_6_10.rewriter;
 
+import com.viaversion.nbt.tag.CompoundTag;
+import com.viaversion.nbt.tag.ListTag;
+import com.viaversion.nbt.tag.StringTag;
 import com.viaversion.viabackwards.api.rewriters.LegacyEnchantmentRewriter;
 import com.viaversion.viarewind.api.rewriter.VRBlockItemRewriter;
+import com.viaversion.viarewind.api.type.RewindTypes;
 import com.viaversion.viarewind.protocol.v1_7_6_10to1_7_2_5.packet.ServerboundPackets1_7_2_5;
 import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.Protocol1_8To1_7_6_10;
 import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.storage.EntityTracker1_8;
 import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.storage.GameProfileStorage;
 import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.storage.InventoryTracker;
 import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.storage.PlayerSessionStorage;
-import com.viaversion.viarewind.api.type.RewindTypes;
 import com.viaversion.viarewind.utils.ChatUtil;
 import com.viaversion.viaversion.api.connection.UserConnection;
 import com.viaversion.viaversion.api.minecraft.item.Item;
 import com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;
 import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.libs.gson.JsonElement;
-import com.viaversion.nbt.tag.*;
 import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ClientboundPackets1_8;
-
 import java.util.UUID;
 
 public class BlockItemPacketRewriter1_8 extends VRBlockItemRewriter<ClientboundPackets1_8, ServerboundPackets1_7_2_5, Protocol1_8To1_7_6_10> {
 
-	private LegacyEnchantmentRewriter enchantmentRewriter;
+    private LegacyEnchantmentRewriter enchantmentRewriter;
 
-	public BlockItemPacketRewriter1_8(Protocol1_8To1_7_6_10 protocol) {
-		super(protocol, "1.8");
-	}
+    public BlockItemPacketRewriter1_8(Protocol1_8To1_7_6_10 protocol) {
+        super(protocol, "1.8");
+    }
 
-	@Override
-	protected void registerPackets() {
-		protocol.registerClientbound(ClientboundPackets1_8.OPEN_SCREEN, wrapper -> {
-			final InventoryTracker windowTracker = wrapper.user().get(InventoryTracker.class);
+    @Override
+    protected void registerPackets() {
+        protocol.registerClientbound(ClientboundPackets1_8.OPEN_SCREEN, wrapper -> {
+            final InventoryTracker windowTracker = wrapper.user().get(InventoryTracker.class);
 
-			final short windowId = wrapper.passthrough(Types.UNSIGNED_BYTE); // Window id
-			final short windowTypeId = InventoryTracker.getInventoryType(wrapper.read(Types.STRING)); // Window type
+            final short windowId = wrapper.passthrough(Types.UNSIGNED_BYTE); // Window id
+            final short windowTypeId = InventoryTracker.getInventoryType(wrapper.read(Types.STRING)); // Window type
 
-			windowTracker.getWindowTypeMap().put(windowId, windowTypeId);
-			wrapper.write(Types.UNSIGNED_BYTE, windowTypeId); // Window type id
+            windowTracker.getWindowTypeMap().put(windowId, windowTypeId);
+            wrapper.write(Types.UNSIGNED_BYTE, windowTypeId); // Window type id
 
-			final JsonElement titleComponent = wrapper.read(Types.COMPONENT); // Title
-			String title = ChatUtil.jsonToLegacy(titleComponent);
-			title = ChatUtil.removeUnusedColor(title, '8');
-			if (title.length() > 32) {
-				title = title.substring(0, 32);
-			}
-			wrapper.write(Types.STRING, title); // Window title
+            final JsonElement titleComponent = wrapper.read(Types.COMPONENT); // Title
+            String title = ChatUtil.jsonToLegacy(titleComponent);
+            title = ChatUtil.removeUnusedColor(title, '8');
+            if (title.length() > 32) {
+                title = title.substring(0, 32);
+            }
+            wrapper.write(Types.STRING, title); // Window title
 
-			wrapper.passthrough(Types.UNSIGNED_BYTE); // Slots
-			wrapper.write(Types.BOOLEAN, true); // Use provided window title
+            wrapper.passthrough(Types.UNSIGNED_BYTE); // Slots
+            wrapper.write(Types.BOOLEAN, true); // Use provided window title
 
-			if (windowTypeId == 11) { // Horse
-				wrapper.passthrough(Types.INT); // Entity id
-			}
-		});
+            if (windowTypeId == 11) { // Horse
+                wrapper.passthrough(Types.INT); // Entity id
+            }
+        });
 
-		protocol.registerClientbound(ClientboundPackets1_8.CONTAINER_CLOSE, wrapper -> {
-			final short windowId = wrapper.passthrough(Types.UNSIGNED_BYTE); // Window id
+        protocol.registerClientbound(ClientboundPackets1_8.CONTAINER_CLOSE, wrapper -> {
+            final short windowId = wrapper.passthrough(Types.UNSIGNED_BYTE); // Window id
 
-			wrapper.user().get(InventoryTracker.class).remove(windowId);
-		});
+            wrapper.user().get(InventoryTracker.class).remove(windowId);
+        });
 
-		protocol.registerClientbound(ClientboundPackets1_8.CONTAINER_SET_SLOT, new PacketHandlers() {
-			@Override
-			public void register() {
-				map(Types.BYTE); // Window id
-				map(Types.SHORT); // Slot
+        protocol.registerClientbound(ClientboundPackets1_8.CONTAINER_SET_SLOT, new PacketHandlers() {
+            @Override
+            public void register() {
+                map(Types.BYTE); // Window id
+                map(Types.SHORT); // Slot
 
-				handler(wrapper -> {
-					final short windowType = wrapper.user().get(InventoryTracker.class).get(wrapper.get(Types.BYTE, 0));
-					final short slot = wrapper.get(Types.SHORT, 0);
-					if (windowType == 4) { // Enchantment Table
-						if (slot == 1) {
-							wrapper.cancel();
-						} else if (slot >= 2) {
-							wrapper.set(Types.SHORT, 0, (short) (slot - 1));
-						}
-					}
-				});
+                handler(wrapper -> {
+                    final short windowType = wrapper.user().get(InventoryTracker.class).get(wrapper.get(Types.BYTE, 0));
+                    final short slot = wrapper.get(Types.SHORT, 0);
+                    if (windowType == 4) { // Enchantment Table
+                        if (slot == 1) {
+                            wrapper.cancel();
+                        } else if (slot >= 2) {
+                            wrapper.set(Types.SHORT, 0, (short) (slot - 1));
+                        }
+                    }
+                });
 
-				map(Types.ITEM1_8, RewindTypes.COMPRESSED_NBT_ITEM); // item
-				handler(wrapper -> handleItemToClient(wrapper.user(), wrapper.get(RewindTypes.COMPRESSED_NBT_ITEM, 0)));
+                map(Types.ITEM1_8, RewindTypes.COMPRESSED_NBT_ITEM); // item
+                handler(wrapper -> handleItemToClient(wrapper.user(), wrapper.get(RewindTypes.COMPRESSED_NBT_ITEM, 0)));
 
-				handler(wrapper -> {
-					final byte windowId = wrapper.get(Types.BYTE, 0);
-					if (windowId != 0) {
-						return;
-					}
-					final short slot = wrapper.get(Types.SHORT, 0);
-					if (slot < 5 || slot > 8) {
-						return;
-					}
-					final PlayerSessionStorage playerSession = wrapper.user().get(PlayerSessionStorage.class);
-					final Item item = wrapper.get(RewindTypes.COMPRESSED_NBT_ITEM, 0);
-					playerSession.setPlayerEquipment(wrapper.user().getProtocolInfo().getUuid(), item, 8 - slot);
+                handler(wrapper -> {
+                    final byte windowId = wrapper.get(Types.BYTE, 0);
+                    if (windowId != 0) {
+                        return;
+                    }
+                    final short slot = wrapper.get(Types.SHORT, 0);
+                    if (slot < 5 || slot > 8) {
+                        return;
+                    }
+                    final PlayerSessionStorage playerSession = wrapper.user().get(PlayerSessionStorage.class);
+                    final Item item = wrapper.get(RewindTypes.COMPRESSED_NBT_ITEM, 0);
+                    playerSession.setPlayerEquipment(wrapper.user().getProtocolInfo().getUuid(), item, 8 - slot);
 
-					final EntityTracker1_8 tracker = wrapper.user().getEntityTracker(Protocol1_8To1_7_6_10.class);
-					if (tracker.isSpectator()) { // Spectator mode didn't exist in 1.7.10
-						wrapper.cancel();
-					}
-				});
-			}
-		});
+                    final EntityTracker1_8 tracker = wrapper.user().getEntityTracker(protocol);
+                    if (tracker.isSpectator()) { // Spectator mode didn't exist in 1.7.10
+                        wrapper.cancel();
+                    }
+                });
+            }
+        });
 
-		protocol.registerClientbound(ClientboundPackets1_8.CONTAINER_SET_CONTENT, new PacketHandlers() {
-			@Override
-			public void register() {
-				map(Types.UNSIGNED_BYTE); // Window id
+        protocol.registerClientbound(ClientboundPackets1_8.CONTAINER_SET_CONTENT, new PacketHandlers() {
+            @Override
+            public void register() {
+                map(Types.UNSIGNED_BYTE); // Window id
 
-				// remap enchantment table items
-				handler(wrapper -> {
-					final short windowType = wrapper.user().get(InventoryTracker.class).get(wrapper.get(Types.UNSIGNED_BYTE, 0));
+                // remap enchantment table items
+                handler(wrapper -> {
+                    final short windowType = wrapper.user().get(InventoryTracker.class).get(wrapper.get(Types.UNSIGNED_BYTE, 0));
 
-					Item[] items = wrapper.read(Types.ITEM1_8_SHORT_ARRAY);
-					if (windowType == 4) { // Enchantment Table
-						Item[] old = items;
-						items = new Item[old.length - 1];
-						items[0] = old[0];
-						System.arraycopy(old, 2, items, 1, old.length - 2);
-					}
-					for (int i = 0; i < items.length; i++) {
-						items[i] = handleItemToClient(wrapper.user(), items[i]);
-					}
-					wrapper.write(RewindTypes.COMPRESSED_NBT_ITEM_ARRAY, items); // Items
-				});
+                    Item[] items = wrapper.read(Types.ITEM1_8_SHORT_ARRAY);
+                    if (windowType == 4) { // Enchantment Table
+                        Item[] old = items;
+                        items = new Item[old.length - 1];
+                        items[0] = old[0];
+                        System.arraycopy(old, 2, items, 1, old.length - 2);
+                    }
+                    for (int i = 0; i < items.length; i++) {
+                        items[i] = handleItemToClient(wrapper.user(), items[i]);
+                    }
+                    wrapper.write(RewindTypes.COMPRESSED_NBT_ITEM_ARRAY, items); // Items
+                });
 
-				handler(wrapper -> {
-					final short windowId = wrapper.get(Types.UNSIGNED_BYTE, 0);
-					if (windowId != 0) {
-						return;
-					}
-					final EntityTracker1_8 tracker = wrapper.user().getEntityTracker(Protocol1_8To1_7_6_10.class);
-					final UUID userId = wrapper.user().getProtocolInfo().getUuid();
+                handler(wrapper -> {
+                    final short windowId = wrapper.get(Types.UNSIGNED_BYTE, 0);
+                    if (windowId != 0) {
+                        return;
+                    }
+                    final EntityTracker1_8 tracker = wrapper.user().getEntityTracker(protocol);
+                    final UUID userId = wrapper.user().getProtocolInfo().getUuid();
 
-					final Item[] items = wrapper.get(RewindTypes.COMPRESSED_NBT_ITEM_ARRAY, 0);
-					for (int i = 5; i < 9; i++) {
-						wrapper.user().get(PlayerSessionStorage.class).setPlayerEquipment(userId, items[i], 8 - i);
-						if (tracker.isSpectator()) {
-							items[i] = null;
-						}
-					}
-					if (tracker.isSpectator()) {
-						final GameProfileStorage.GameProfile profile = wrapper.user().get(GameProfileStorage.class).get(userId);
-						if (profile != null) {
-							items[5] = profile.getSkull();
-						}
-					}
-				});
-			}
-		});
+                    final Item[] items = wrapper.get(RewindTypes.COMPRESSED_NBT_ITEM_ARRAY, 0);
+                    for (int i = 5; i < 9; i++) {
+                        wrapper.user().get(PlayerSessionStorage.class).setPlayerEquipment(userId, items[i], 8 - i);
+                        if (tracker.isSpectator()) {
+                            items[i] = null;
+                        }
+                    }
+                    if (tracker.isSpectator()) {
+                        final GameProfileStorage.GameProfile profile = wrapper.user().get(GameProfileStorage.class).get(userId);
+                        if (profile != null) {
+                            items[5] = profile.getSkull();
+                        }
+                    }
+                });
+            }
+        });
 
-		protocol.registerClientbound(ClientboundPackets1_8.CONTAINER_SET_DATA, new PacketHandlers() {
-			@Override
-			public void register() {
-				map(Types.UNSIGNED_BYTE); // Window id
-				map(Types.SHORT); // Progress bar id
-				map(Types.SHORT); // Progress bar value
+        protocol.registerClientbound(ClientboundPackets1_8.CONTAINER_SET_DATA, new PacketHandlers() {
+            @Override
+            public void register() {
+                map(Types.UNSIGNED_BYTE); // Window id
+                map(Types.SHORT); // Progress bar id
+                map(Types.SHORT); // Progress bar value
 
-				handler(wrapper -> {
-					final InventoryTracker windowTracker = wrapper.user().get(InventoryTracker.class);
+                handler(wrapper -> {
+                    final InventoryTracker windowTracker = wrapper.user().get(InventoryTracker.class);
 
-					final short windowId = wrapper.get(Types.UNSIGNED_BYTE, 0);
-					final short windowType = windowTracker.get(windowId);
+                    final short windowId = wrapper.get(Types.UNSIGNED_BYTE, 0);
+                    final short windowType = windowTracker.get(windowId);
 
-					final short progressBarId = wrapper.get(Types.SHORT, 0);
-					short progress = wrapper.get(Types.SHORT, 1);
+                    final short progressBarId = wrapper.get(Types.SHORT, 0);
+                    short progress = wrapper.get(Types.SHORT, 1);
 
-					if (windowType == 2) { // Furnace
-						// TODO | Proper methods (getOrCreate)=
-						final InventoryTracker.FurnaceData furnace = windowTracker.getFurnaceData().computeIfAbsent(windowId, x -> new InventoryTracker.FurnaceData());
-						if (progressBarId == 0 || progressBarId == 1) {
-							if (progressBarId == 0) {
-								furnace.fuelLeft = progress;
-							} else {
-								furnace.maxFuel = progress;
-							}
-							if (furnace.maxFuel == 0) {
-								wrapper.cancel();
-								return;
-							}
-							progress = (short) (200 * furnace.fuelLeft / furnace.maxFuel);
-							wrapper.set(Types.SHORT, 0, (short) 1);
-							wrapper.set(Types.SHORT, 1, progress);
-						} else if (progressBarId == 2 || progressBarId == 3) {
-							if (progressBarId == 2) {
-								furnace.progress = progress;
-							} else {
-								furnace.maxProgress = progress;
-							}
-							if (furnace.maxProgress == 0) {
-								wrapper.cancel();
-								return;
-							}
-							progress = (short) (200 * furnace.progress / furnace.maxProgress);
-							wrapper.set(Types.SHORT, 0, (short) 0);
-							wrapper.set(Types.SHORT, 1, progress);
-						}
-					} else if (windowType == 4 && progressBarId > 2) { // Enchanting Table
-						wrapper.cancel();
-					} else if (windowType == 8) { // Anvil
-						windowTracker.levelCost = progress;
-						windowTracker.anvilId = windowId;
-					}
-				});
-			}
-		});
+                    if (windowType == 2) { // Furnace
+                        // TODO | Proper methods (getOrCreate)=
+                        final InventoryTracker.FurnaceData furnace = windowTracker.getFurnaceData().computeIfAbsent(windowId, x -> new InventoryTracker.FurnaceData());
+                        if (progressBarId == 0 || progressBarId == 1) {
+                            if (progressBarId == 0) {
+                                furnace.fuelLeft = progress;
+                            } else {
+                                furnace.maxFuel = progress;
+                            }
+                            if (furnace.maxFuel == 0) {
+                                wrapper.cancel();
+                                return;
+                            }
+                            progress = (short) (200 * furnace.fuelLeft / furnace.maxFuel);
+                            wrapper.set(Types.SHORT, 0, (short) 1);
+                            wrapper.set(Types.SHORT, 1, progress);
+                        } else if (progressBarId == 2 || progressBarId == 3) {
+                            if (progressBarId == 2) {
+                                furnace.progress = progress;
+                            } else {
+                                furnace.maxProgress = progress;
+                            }
+                            if (furnace.maxProgress == 0) {
+                                wrapper.cancel();
+                                return;
+                            }
+                            progress = (short) (200 * furnace.progress / furnace.maxProgress);
+                            wrapper.set(Types.SHORT, 0, (short) 0);
+                            wrapper.set(Types.SHORT, 1, progress);
+                        }
+                    } else if (windowType == 4 && progressBarId > 2) { // Enchanting Table
+                        wrapper.cancel();
+                    } else if (windowType == 8) { // Anvil
+                        windowTracker.levelCost = progress;
+                        windowTracker.anvilId = windowId;
+                    }
+                });
+            }
+        });
 
-		protocol.registerServerbound(ServerboundPackets1_7_2_5.CONTAINER_CLOSE, wrapper -> {
-			final byte windowId = wrapper.passthrough(Types.BYTE);
+        protocol.registerServerbound(ServerboundPackets1_7_2_5.CONTAINER_CLOSE, wrapper -> {
+            final byte windowId = wrapper.passthrough(Types.BYTE);
 
-			wrapper.user().get(InventoryTracker.class).remove(windowId);
-		});
+            wrapper.user().get(InventoryTracker.class).remove(windowId);
+        });
 
-		protocol.registerServerbound(ServerboundPackets1_7_2_5.CONTAINER_CLICK, new PacketHandlers() {
-			@Override
-			public void register() {
-				map(Types.BYTE); // Window id
-				map(Types.SHORT); // Slot
-				handler(wrapper -> {
-					final byte windowId = wrapper.get(Types.BYTE, 0); // Window id
-					final short slot = wrapper.get(Types.SHORT, 0);
+        protocol.registerServerbound(ServerboundPackets1_7_2_5.CONTAINER_CLICK, new PacketHandlers() {
+            @Override
+            public void register() {
+                map(Types.BYTE); // Window id
+                map(Types.SHORT); // Slot
+                handler(wrapper -> {
+                    final byte windowId = wrapper.get(Types.BYTE, 0); // Window id
+                    final short slot = wrapper.get(Types.SHORT, 0);
 
-					final short windowType = wrapper.user().get(InventoryTracker.class).get(windowId);
-					if (windowType == 4) { // Enchantment Table
-						if (slot > 0) {
-							wrapper.set(Types.SHORT, 0, (short) (slot + 1));
-						}
-					}
-				});
-				map(Types.BYTE); // Button
-				map(Types.SHORT); // Action number
-				map(Types.BYTE); // Mode
-				map(RewindTypes.COMPRESSED_NBT_ITEM, Types.ITEM1_8); // Clicked item
+                    final short windowType = wrapper.user().get(InventoryTracker.class).get(windowId);
+                    if (windowType == 4) { // Enchantment Table
+                        if (slot > 0) {
+                            wrapper.set(Types.SHORT, 0, (short) (slot + 1));
+                        }
+                    }
+                });
+                map(Types.BYTE); // Button
+                map(Types.SHORT); // Action number
+                map(Types.BYTE); // Mode
+                map(RewindTypes.COMPRESSED_NBT_ITEM, Types.ITEM1_8); // Clicked item
 
-				handler(wrapper -> handleItemToServer(wrapper.user(), wrapper.get(Types.ITEM1_8, 0)));
-			}
-		});
+                handler(wrapper -> handleItemToServer(wrapper.user(), wrapper.get(Types.ITEM1_8, 0)));
+            }
+        });
 
-		protocol.registerServerbound(ServerboundPackets1_7_2_5.SET_CREATIVE_MODE_SLOT, new PacketHandlers() {
-			@Override
-			public void register() {
-				map(Types.SHORT); // Slot
-				map(RewindTypes.COMPRESSED_NBT_ITEM, Types.ITEM1_8); // Item
+        protocol.registerServerbound(ServerboundPackets1_7_2_5.SET_CREATIVE_MODE_SLOT, new PacketHandlers() {
+            @Override
+            public void register() {
+                map(Types.SHORT); // Slot
+                map(RewindTypes.COMPRESSED_NBT_ITEM, Types.ITEM1_8); // Item
 
-				handler(wrapper -> handleItemToServer(wrapper.user(), wrapper.get(Types.ITEM1_8, 0)));
-			}
-		});
-	}
+                handler(wrapper -> handleItemToServer(wrapper.user(), wrapper.get(Types.ITEM1_8, 0)));
+            }
+        });
+    }
 
-	@Override
-	protected void registerRewrites() {
-		enchantmentRewriter = new LegacyEnchantmentRewriter(nbtTagName(), false);
-		enchantmentRewriter.registerEnchantment(8, "§7Depth Strider");
-	}
+    @Override
+    protected void registerRewrites() {
+        enchantmentRewriter = new LegacyEnchantmentRewriter(nbtTagName(), false);
+        enchantmentRewriter.registerEnchantment(8, "§7Depth Strider");
+    }
 
-	@Override
-	public Item handleItemToClient(UserConnection connection, Item item) {
-		if (item == null) return null;
-		super.handleItemToClient(connection, item);
+    @Override
+    public Item handleItemToClient(UserConnection connection, Item item) {
+        if (item == null) return null;
+        super.handleItemToClient(connection, item);
 
-		CompoundTag tag = item.tag();
-		if (tag == null) return item;
+        CompoundTag tag = item.tag();
+        if (tag == null) return item;
 
-		enchantmentRewriter.handleToClient(item);
+        enchantmentRewriter.handleToClient(item);
 
-		if (item.identifier() == 387) {
-			final ListTag<StringTag> pages = tag.getListTag("pages", StringTag.class);
-			if (pages == null) return item;
+        if (item.identifier() == 387) {
+            final ListTag<StringTag> pages = tag.getListTag("pages", StringTag.class);
+            if (pages == null) return item;
 
-			final ListTag<StringTag> oldPages = new ListTag<>(StringTag.class);
-			tag.put(nbtTagName() + "|pages", oldPages);
+            final ListTag<StringTag> oldPages = new ListTag<>(StringTag.class);
+            tag.put(nbtTagName() + "|pages", oldPages);
 
-			for (StringTag page : pages) {
-				final String value = page.getValue();
-				oldPages.add(new StringTag(value));
-				page.setValue(ChatUtil.jsonToLegacy(value));
-			}
-		}
-		return item;
-	}
+            for (StringTag page : pages) {
+                final String value = page.getValue();
+                oldPages.add(new StringTag(value));
+                page.setValue(ChatUtil.jsonToLegacy(value));
+            }
+        }
+        return item;
+    }
 
-	@Override
-	public Item handleItemToServer(UserConnection connection, Item item) {
-		if (item == null) return null;
-		super.handleItemToServer(connection, item);
+    @Override
+    public Item handleItemToServer(UserConnection connection, Item item) {
+        if (item == null) return null;
+        super.handleItemToServer(connection, item);
 
-		final CompoundTag tag = item.tag();
-		if (tag == null) return item;
+        final CompoundTag tag = item.tag();
+        if (tag == null) return item;
 
-		enchantmentRewriter.handleToServer(item);
+        enchantmentRewriter.handleToServer(item);
 
-		if (item.identifier() == 387) {
-			final ListTag<StringTag> oldPages = tag.getListTag(nbtTagName() + "|pages", StringTag.class);
-			if (oldPages != null) {
-				tag.remove("pages");
-				tag.put("pages", oldPages);
-			}
-		}
+        if (item.identifier() == 387) {
+            final ListTag<StringTag> oldPages = tag.getListTag(nbtTagName() + "|pages", StringTag.class);
+            if (oldPages != null) {
+                tag.remove("pages");
+                tag.put("pages", oldPages);
+            }
+        }
 
-		return item;
-	}
+        return item;
+    }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_8to1_7_6_10/rewriter/ScoreboardPacketRewriter1_8.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -19,6 +19,7 @@ package com.viaversion.viarewind.protocol.v1_8to1_7_6_10.rewriter;
 
 import com.viaversion.viarewind.protocol.v1_7_6_10to1_7_2_5.packet.ClientboundPackets1_7_2_5;
 import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.Protocol1_8To1_7_6_10;
+import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.storage.EntityTracker1_8;
 import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.storage.ScoreboardTracker;
 import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
 import com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;
@@ -26,227 +27,244 @@ import com.viaversion.viaversion.api.rewriter.RewriterBase;
 import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ClientboundPackets1_8;
 import com.viaversion.viaversion.util.ChatColorUtil;
-
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Optional;
 
 public class ScoreboardPacketRewriter1_8 extends RewriterBase<Protocol1_8To1_7_6_10> {
 
-	public ScoreboardPacketRewriter1_8(Protocol1_8To1_7_6_10 protocol) {
-		super(protocol);
-	}
+    public ScoreboardPacketRewriter1_8(Protocol1_8To1_7_6_10 protocol) {
+        super(protocol);
+    }
 
-	@Override
-	protected void registerPackets() {
-		protocol.registerClientbound(ClientboundPackets1_8.SET_OBJECTIVE, wrapper -> {
-			String name = wrapper.passthrough(Types.STRING);
-			if (name.length() > 16) {
-				wrapper.set(Types.STRING, 0, name = name.substring(0, 16));
-			}
+    @Override
+    protected void registerPackets() {
+        protocol.registerClientbound(ClientboundPackets1_8.SET_OBJECTIVE, wrapper -> {
+            String name = wrapper.passthrough(Types.STRING);
+            if (name.length() > 16) {
+                wrapper.set(Types.STRING, 0, name = name.substring(0, 16));
+            }
 
-			final byte mode = wrapper.read(Types.BYTE);
-			ScoreboardTracker scoreboard = wrapper.user().get(ScoreboardTracker.class);
-			if (mode == 0) {
-				if (scoreboard.objectiveExists(name)) {
-					wrapper.cancel();
-					return;
-				}
-				scoreboard.addObjective(name);
-			} else if (mode == 1) {
-				if (!scoreboard.objectiveExists(name)) {
-					wrapper.cancel();
-					return;
-				}
-				if (scoreboard.getColorIndependentSidebar() != null) {
-					String username = wrapper.user().getProtocolInfo().getUsername();
-					Optional<Byte> color = scoreboard.getPlayerTeamColor(username);
-					if (color.isPresent()) {
-						String sidebar = scoreboard.getColorDependentSidebar().get(color.get());
-						if (name.equals(sidebar)) {
-							final PacketWrapper sidebarPacket = PacketWrapper.create(ClientboundPackets1_7_2_5.SET_DISPLAY_OBJECTIVE, wrapper.user());
-							sidebarPacket.write(Types.BYTE, (byte) 1);
-							sidebarPacket.write(Types.STRING, scoreboard.getColorIndependentSidebar());
-							sidebarPacket.scheduleSend(Protocol1_8To1_7_6_10.class);
-						}
-					}
-				}
-				scoreboard.removeObjective(name);
-			} else if (mode == 2) {
-				if (!scoreboard.objectiveExists(name)) {
-					wrapper.cancel();
-					return;
-				}
-			}
+            final byte mode = wrapper.read(Types.BYTE);
+            ScoreboardTracker scoreboard = wrapper.user().get(ScoreboardTracker.class);
+            if (mode == 0) {
+                if (scoreboard.objectiveExists(name)) {
+                    wrapper.cancel();
+                    return;
+                }
+                scoreboard.addObjective(name);
+            } else if (mode == 1) {
+                if (!scoreboard.objectiveExists(name)) {
+                    wrapper.cancel();
+                    return;
+                }
+                if (scoreboard.getColorIndependentSidebar() != null) {
+                    String username = wrapper.user().getProtocolInfo().getUsername();
+                    Optional<Byte> color = scoreboard.getPlayerTeamColor(username);
+                    if (color.isPresent()) {
+                        String sidebar = scoreboard.getColorDependentSidebar().get(color.get());
+                        if (name.equals(sidebar)) {
+                            final PacketWrapper sidebarPacket = PacketWrapper.create(ClientboundPackets1_7_2_5.SET_DISPLAY_OBJECTIVE, wrapper.user());
+                            sidebarPacket.write(Types.BYTE, (byte) 1);
+                            sidebarPacket.write(Types.STRING, scoreboard.getColorIndependentSidebar());
+                            sidebarPacket.scheduleSend(Protocol1_8To1_7_6_10.class);
+                        }
+                    }
+                }
+                scoreboard.removeObjective(name);
+            } else if (mode == 2) {
+                if (!scoreboard.objectiveExists(name)) {
+                    wrapper.cancel();
+                    return;
+                }
+            }
 
-			if (mode == 0 || mode == 2) {
-				String displayName = wrapper.passthrough(Types.STRING);
-				if (displayName.length() > 32) {
-					wrapper.set(Types.STRING, 1, displayName.substring(0, 32));
-				}
-				wrapper.read(Types.STRING);
-			} else {
-				wrapper.write(Types.STRING, "");
-			}
-			wrapper.write(Types.BYTE, mode);
-		});
+            if (mode == 0 || mode == 2) {
+                String displayName = wrapper.passthrough(Types.STRING);
+                if (displayName.length() > 32) {
+                    wrapper.set(Types.STRING, 1, displayName.substring(0, 32));
+                }
+                wrapper.read(Types.STRING);
+            } else {
+                wrapper.write(Types.STRING, "");
+            }
+            wrapper.write(Types.BYTE, mode);
+        });
 
-		protocol.registerClientbound(ClientboundPackets1_8.SET_SCORE, new PacketHandlers() {
-			@Override
-			public void register() {
-				map(Types.STRING); // Name
-				map(Types.VAR_INT, Types.BYTE); // Mode
-				handler(wrapper -> {
-					ScoreboardTracker scoreboard = wrapper.user().get(ScoreboardTracker.class);
-					String name = wrapper.get(Types.STRING, 0);
-					byte mode = wrapper.get(Types.BYTE, 0);
+        protocol.registerClientbound(ClientboundPackets1_8.SET_SCORE, new PacketHandlers() {
+            @Override
+            public void register() {
+                map(Types.STRING); // Name
+                map(Types.VAR_INT, Types.BYTE); // Mode
+                handler(wrapper -> {
+                    ScoreboardTracker scoreboard = wrapper.user().get(ScoreboardTracker.class);
+                    String name = wrapper.get(Types.STRING, 0);
+                    byte mode = wrapper.get(Types.BYTE, 0);
 
-					if (mode == 1) {
-						name = scoreboard.removeTeamForScore(name);
-					} else {
-						name = scoreboard.sendTeamForScore(name);
-					}
+                    if (mode == 1) {
+                        name = scoreboard.removeTeamForScore(name);
+                    } else {
+                        name = scoreboard.sendTeamForScore(name);
+                    }
 
-					if (name.length() > 16) {
-						name = ChatColorUtil.stripColor(name);
-						if (name.length() > 16) {
-							name = name.substring(0, 16);
-						}
-					}
-					wrapper.set(Types.STRING, 0, name);
+                    if (name.length() > 16) {
+                        name = ChatColorUtil.stripColor(name);
+                        if (name.length() > 16) {
+                            name = name.substring(0, 16);
+                        }
+                    }
+                    wrapper.set(Types.STRING, 0, name);
 
-					String objective = wrapper.read(Types.STRING);
-					if (objective.length() > 16) {
-						objective = objective.substring(0, 16);
-					}
+                    String objective = wrapper.read(Types.STRING);
+                    if (objective.length() > 16) {
+                        objective = objective.substring(0, 16);
+                    }
 
-					if (mode != 1) {
-						int score = wrapper.read(Types.VAR_INT);
-						wrapper.write(Types.STRING, objective);
-						wrapper.write(Types.INT, score);
-					}
-				});
-			}
-		});
+                    if (mode != 1) {
+                        int score = wrapper.read(Types.VAR_INT);
+                        wrapper.write(Types.STRING, objective);
+                        wrapper.write(Types.INT, score);
+                    }
+                });
+            }
+        });
 
-		protocol.registerClientbound(ClientboundPackets1_8.SET_DISPLAY_OBJECTIVE, new PacketHandlers() {
-			@Override
-			public void register() {
-				map(Types.BYTE); // Position
-				map(Types.STRING); // Score name
-				handler(wrapper -> {
-					byte position = wrapper.get(Types.BYTE, 0);
-					String name = wrapper.get(Types.STRING, 0);
-					ScoreboardTracker scoreboard = wrapper.user().get(ScoreboardTracker.class);
-					if (position > 2) { // team specific sidebar
-						byte receiverTeamColor = (byte) (position - 3);
-						scoreboard.getColorDependentSidebar().put(receiverTeamColor, name);
+        protocol.registerClientbound(ClientboundPackets1_8.SET_DISPLAY_OBJECTIVE, new PacketHandlers() {
+            @Override
+            public void register() {
+                map(Types.BYTE); // Position
+                map(Types.STRING); // Score name
+                handler(wrapper -> {
+                    byte position = wrapper.get(Types.BYTE, 0);
+                    String name = wrapper.get(Types.STRING, 0);
+                    ScoreboardTracker scoreboard = wrapper.user().get(ScoreboardTracker.class);
+                    if (position > 2) { // team specific sidebar
+                        byte receiverTeamColor = (byte) (position - 3);
+                        scoreboard.getColorDependentSidebar().put(receiverTeamColor, name);
 
-						String username = wrapper.user().getProtocolInfo().getUsername();
-						Optional<Byte> color = scoreboard.getPlayerTeamColor(username);
-						if (color.isPresent() && color.get() == receiverTeamColor) {
-							position = 1;
-						} else {
-							position = -1;
-						}
-					} else if (position == 1) { // team independent sidebar
-						scoreboard.setColorIndependentSidebar(name);
-						String username = wrapper.user().getProtocolInfo().getUsername();
-						Optional<Byte> color = scoreboard.getPlayerTeamColor(username);
-						if (color.isPresent() && scoreboard.getColorDependentSidebar().containsKey(color.get())) {
-							position = -1;
-						}
-					}
-					if (position == -1) {
-						wrapper.cancel();
-						return;
-					}
-					wrapper.set(Types.BYTE, 0, position);
-				});
-			}
-		});
+                        String username = wrapper.user().getProtocolInfo().getUsername();
+                        Optional<Byte> color = scoreboard.getPlayerTeamColor(username);
+                        if (color.isPresent() && color.get() == receiverTeamColor) {
+                            position = 1;
+                        } else {
+                            position = -1;
+                        }
+                    } else if (position == 1) { // team independent sidebar
+                        scoreboard.setColorIndependentSidebar(name);
+                        String username = wrapper.user().getProtocolInfo().getUsername();
+                        Optional<Byte> color = scoreboard.getPlayerTeamColor(username);
+                        if (color.isPresent() && scoreboard.getColorDependentSidebar().containsKey(color.get())) {
+                            position = -1;
+                        }
+                    }
+                    if (position == -1) {
+                        wrapper.cancel();
+                        return;
+                    }
+                    wrapper.set(Types.BYTE, 0, position);
+                });
+            }
+        });
 
-		protocol.registerClientbound(ClientboundPackets1_8.SET_PLAYER_TEAM, wrapper -> {
-			final String team = wrapper.passthrough(Types.STRING);
-			if (team == null) {
-				wrapper.cancel();
-				return;
-			}
+        protocol.registerClientbound(ClientboundPackets1_8.SET_PLAYER_TEAM, wrapper -> {
+            final String team = wrapper.passthrough(Types.STRING);
+            if (team == null) {
+                wrapper.cancel();
+                return;
+            }
 
-			final ScoreboardTracker scoreboard = wrapper.user().get(ScoreboardTracker.class);
+            final ScoreboardTracker scoreboard = wrapper.user().get(ScoreboardTracker.class);
+            final EntityTracker1_8 tracker = wrapper.user().getEntityTracker(protocol);
 
-			final byte mode = wrapper.passthrough(Types.BYTE);
-			if (mode != 0 && !scoreboard.teamExists(team)) {
-				wrapper.cancel();
-				return;
-			} else if (mode == 0 && scoreboard.teamExists(team)) {
-				scoreboard.removeTeam(team);
+            final byte mode = wrapper.passthrough(Types.BYTE);
+            if (mode != 0 && !scoreboard.teamExists(team)) {
+                wrapper.cancel();
+                return;
+            } else if (mode == 0 && scoreboard.teamExists(team)) {
+                scoreboard.removeTeam(team);
 
-				final PacketWrapper removeTeam = PacketWrapper.create(ClientboundPackets1_7_2_5.SET_PLAYER_TEAM, wrapper.user());
-				removeTeam.write(Types.STRING, team);
-				removeTeam.write(Types.BYTE, (byte) 1);
-				removeTeam.send(Protocol1_8To1_7_6_10.class);
-			}
+                final PacketWrapper removeTeam = PacketWrapper.create(ClientboundPackets1_7_2_5.SET_PLAYER_TEAM, wrapper.user());
+                removeTeam.write(Types.STRING, team);
+                removeTeam.write(Types.BYTE, (byte) 1);
+                removeTeam.send(Protocol1_8To1_7_6_10.class);
+            }
 
-			if (mode == 0) {
-				scoreboard.addTeam(team);
-			} else if (mode == 1) {
-				scoreboard.removeTeam(team);
-			}
+            if (mode == 0) {
+                scoreboard.addTeam(team);
+            } else if (mode == 1) {
+                // Team removed, nametag visibility might have changed
+                for (final String member : scoreboard.getTeamMembers(team)) {
+                    tracker.checkNametagVisbility(member);
+                }
+                scoreboard.removeTeam(team);
+            }
 
-			if (mode == 0 || mode == 2) {
-				wrapper.passthrough(Types.STRING); // Display name
-				wrapper.passthrough(Types.STRING); // Prefix
-				wrapper.passthrough(Types.STRING); // Suffix
-				wrapper.passthrough(Types.BYTE); // Friendly fire
-				wrapper.read(Types.STRING); // Name tag visibility
-				byte color = wrapper.read(Types.BYTE);
-				if (mode == 2 && scoreboard.getTeamColor(team).get() != color) {
-					final String sidebar = scoreboard.getColorDependentSidebar().get(color);
+            if (mode == 0 || mode == 2) {
+                wrapper.passthrough(Types.STRING); // Display name
+                wrapper.passthrough(Types.STRING); // Prefix
+                wrapper.passthrough(Types.STRING); // Suffix
+                wrapper.passthrough(Types.BYTE); // Friendly fire
+                final String nameTagVisibility = wrapper.read(Types.STRING);
+                final String previousVisibility = scoreboard.getTeamNameTagVisibility(team);
+                scoreboard.setTeamNameTagVisibility(team, nameTagVisibility);
+                byte color = wrapper.read(Types.BYTE);
+                if (mode == 2 && scoreboard.getTeamColor(team).get() != color) {
+                    final String sidebar = scoreboard.getColorDependentSidebar().get(color);
 
-					final PacketWrapper sidebarPacket = PacketWrapper.create(ClientboundPackets1_7_2_5.SET_DISPLAY_OBJECTIVE, wrapper.user());
-					sidebarPacket.write(Types.BYTE, (byte) 1);
-					sidebarPacket.write(Types.STRING, sidebar == null ? "" : sidebar);
-					sidebarPacket.scheduleSend(Protocol1_8To1_7_6_10.class);
-				}
-				scoreboard.setTeamColor(team, color);
-			}
-			if (mode == 0 || mode == 3 || mode == 4) {
-				byte color = scoreboard.getTeamColor(team).get();
-				String[] entries = wrapper.read(Types.STRING_ARRAY);
-				List<String> entryList = new ArrayList<>();
+                    final PacketWrapper sidebarPacket = PacketWrapper.create(ClientboundPackets1_7_2_5.SET_DISPLAY_OBJECTIVE, wrapper.user());
+                    sidebarPacket.write(Types.BYTE, (byte) 1);
+                    sidebarPacket.write(Types.STRING, sidebar == null ? "" : sidebar);
+                    sidebarPacket.scheduleSend(Protocol1_8To1_7_6_10.class);
+                }
+                scoreboard.setTeamColor(team, color);
 
-				for (String entry : entries) {
-					String username = wrapper.user().getProtocolInfo().getUsername();
+                // Re-evaluate nametag visibility for all team members when visibility changes
+                if (mode == 2 && !nameTagVisibility.equals(previousVisibility)) {
+                    for (final String member : scoreboard.getTeamMembers(team)) {
+                        tracker.checkNametagVisbility(member);
+                    }
+                }
+            }
+            if (mode == 0 || mode == 3 || mode == 4) {
+                byte color = scoreboard.getTeamColor(team).get();
+                String[] entries = wrapper.read(Types.STRING_ARRAY);
+                List<String> entryList = new ArrayList<>();
 
-					if (mode == 4) {
-						if (!scoreboard.isPlayerInTeam(entry, team)) {
-							continue;
-						}
-						scoreboard.removePlayerFromTeam(entry, team);
-						if (entry.equals(username)) {
-							final PacketWrapper sidebarPacket = PacketWrapper.create(ClientboundPackets1_7_2_5.SET_DISPLAY_OBJECTIVE, wrapper.user());
-							sidebarPacket.write(Types.BYTE, (byte) 1);
-							sidebarPacket.write(Types.STRING, scoreboard.getColorIndependentSidebar() == null ? "" : scoreboard.getColorIndependentSidebar());
-							sidebarPacket.scheduleSend(Protocol1_8To1_7_6_10.class);
-						}
-					} else {
-						scoreboard.addPlayerToTeam(entry, team);
-						if (entry.equals(username) && scoreboard.getColorDependentSidebar().containsKey(color)) {
-							final PacketWrapper displayObjective = PacketWrapper.create(ClientboundPackets1_7_2_5.SET_DISPLAY_OBJECTIVE, wrapper.user());
-							displayObjective.write(Types.BYTE, (byte) 1);
-							displayObjective.write(Types.STRING, scoreboard.getColorDependentSidebar().get(color));
-							displayObjective.scheduleSend(Protocol1_8To1_7_6_10.class);
-						}
-					}
-					entryList.add(entry);
-				}
+                for (String entry : entries) {
+                    String username = wrapper.user().getProtocolInfo().getUsername();
 
-				wrapper.write(Types.SHORT, (short) entryList.size());
-				for (String entry : entryList) {
-					wrapper.write(Types.STRING, entry);
-				}
-			}
-		});
-	}
+                    if (mode == 4) {
+                        if (!scoreboard.isPlayerInTeam(entry, team)) {
+                            continue;
+                        }
+                        scoreboard.removePlayerFromTeam(entry, team);
+                        // Player left team, nametag visibility may change
+                        tracker.checkNametagVisbility(entry);
+                        if (entry.equals(username)) {
+                            final PacketWrapper sidebarPacket = PacketWrapper.create(ClientboundPackets1_7_2_5.SET_DISPLAY_OBJECTIVE, wrapper.user());
+                            sidebarPacket.write(Types.BYTE, (byte) 1);
+                            sidebarPacket.write(Types.STRING, scoreboard.getColorIndependentSidebar() == null ? "" : scoreboard.getColorIndependentSidebar());
+                            sidebarPacket.scheduleSend(Protocol1_8To1_7_6_10.class);
+                        }
+                    } else {
+                        scoreboard.addPlayerToTeam(entry, team);
+                        // Player joined team, nametag visibility may change
+                        tracker.checkNametagVisbility(entry);
+                        if (entry.equals(username) && scoreboard.getColorDependentSidebar().containsKey(color)) {
+                            final PacketWrapper displayObjective = PacketWrapper.create(ClientboundPackets1_7_2_5.SET_DISPLAY_OBJECTIVE, wrapper.user());
+                            displayObjective.write(Types.BYTE, (byte) 1);
+                            displayObjective.write(Types.STRING, scoreboard.getColorDependentSidebar().get(color));
+                            displayObjective.scheduleSend(Protocol1_8To1_7_6_10.class);
+                        }
+                    }
+                    entryList.add(entry);
+                }
+
+                wrapper.write(Types.SHORT, (short) entryList.size());
+                for (String entry : entryList) {
+                    wrapper.write(Types.STRING, entry);
+                }
+            }
+        });
+    }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_8to1_7_6_10/rewriter/WorldPacketRewriter1_8.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -17,14 +17,15 @@
  */
 package com.viaversion.viarewind.protocol.v1_8to1_7_6_10.rewriter;
 
-import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.Protocol1_8To1_7_6_10;
-import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.storage.WorldBorderEmulator;
-import com.viaversion.viarewind.api.type.chunk.ChunkType1_7_6;
-import com.viaversion.viarewind.api.type.chunk.BulkChunkType1_7_6;
-import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.data.Particles1_8;
 import com.viaversion.viarewind.api.type.RewindTypes;
+import com.viaversion.viarewind.api.type.chunk.BulkChunkType1_7_6;
+import com.viaversion.viarewind.api.type.chunk.ChunkType1_7_6;
+import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.Protocol1_8To1_7_6_10;
+import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.data.Particles1_8;
+import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.storage.WorldBorderEmulator;
 import com.viaversion.viarewind.utils.ChatUtil;
 import com.viaversion.viaversion.api.minecraft.BlockChangeRecord;
+import com.viaversion.viaversion.api.minecraft.ClientWorld;
 import com.viaversion.viaversion.api.minecraft.chunks.Chunk;
 import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
 import com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;
@@ -33,261 +34,260 @@ import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.api.type.types.FixedByteArrayType;
 import com.viaversion.viaversion.api.type.types.chunk.BulkChunkType1_8;
 import com.viaversion.viaversion.api.type.types.chunk.ChunkType1_8;
-import com.viaversion.viaversion.api.minecraft.ClientWorld;
 import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ClientboundPackets1_8;
 import com.viaversion.viaversion.util.ChatColorUtil;
 import com.viaversion.viaversion.util.IdAndData;
 
 public class WorldPacketRewriter1_8 extends RewriterBase<Protocol1_8To1_7_6_10> {
 
-	public WorldPacketRewriter1_8(Protocol1_8To1_7_6_10 protocol) {
-		super(protocol);
-	}
+    public WorldPacketRewriter1_8(Protocol1_8To1_7_6_10 protocol) {
+        super(protocol);
+    }
 
-	@Override
-	protected void registerPackets() {
-		protocol.registerClientbound(ClientboundPackets1_8.LEVEL_CHUNK, wrapper -> {
-			final ClientWorld world = wrapper.user().getClientWorld(Protocol1_8To1_7_6_10.class);
-			final Chunk chunk = wrapper.read(ChunkType1_8.forEnvironment(world.getEnvironment()));
-			protocol.getItemRewriter().handleChunk(chunk);
+    @Override
+    protected void registerPackets() {
+        protocol.registerClientbound(ClientboundPackets1_8.LEVEL_CHUNK, wrapper -> {
+            final ClientWorld world = wrapper.user().storables(protocol).clientWorld();
+            final Chunk chunk = wrapper.read(ChunkType1_8.forEnvironment(world.getEnvironment()));
+            protocol.getItemRewriter().handleChunk(chunk);
 
-			wrapper.write(ChunkType1_7_6.TYPE, chunk);
-		});
+            wrapper.write(ChunkType1_7_6.TYPE, chunk);
+        });
 
-		protocol.registerClientbound(ClientboundPackets1_8.BLOCK_UPDATE, new PacketHandlers() {
-			@Override
-			protected void register() {
-				map(Types.BLOCK_POSITION1_8, RewindTypes.U_BYTE_POSITION); // Position
-				handler(wrapper -> {
-					int data = wrapper.read(Types.VAR_INT); // Block data
-					data = protocol.getItemRewriter().handleBlockId(data);
+        protocol.registerClientbound(ClientboundPackets1_8.BLOCK_UPDATE, new PacketHandlers() {
+            @Override
+            protected void register() {
+                map(Types.BLOCK_POSITION1_8, RewindTypes.U_BYTE_POSITION); // Position
+                handler(wrapper -> {
+                    int data = wrapper.read(Types.VAR_INT); // Block data
+                    data = protocol.getItemRewriter().handleBlockId(data);
 
-					wrapper.write(Types.VAR_INT, IdAndData.getId(data)); // Block id
-					wrapper.write(Types.UNSIGNED_BYTE, (short) IdAndData.getData(data)); // Block data
-				});
-			}
-		});
+                    wrapper.write(Types.VAR_INT, IdAndData.getId(data)); // Block id
+                    wrapper.write(Types.UNSIGNED_BYTE, (short) IdAndData.getData(data)); // Block data
+                });
+            }
+        });
 
-		protocol.registerClientbound(ClientboundPackets1_8.CHUNK_BLOCKS_UPDATE, new PacketHandlers() {
-			@Override
-			public void register() {
-				map(Types.INT); // Chunk x
-				map(Types.INT); // Chunk z
+        protocol.registerClientbound(ClientboundPackets1_8.CHUNK_BLOCKS_UPDATE, new PacketHandlers() {
+            @Override
+            public void register() {
+                map(Types.INT); // Chunk x
+                map(Types.INT); // Chunk z
 
-				handler(wrapper -> {
-					final BlockChangeRecord[] records = wrapper.read(Types.BLOCK_CHANGE_ARRAY);
+                handler(wrapper -> {
+                    final BlockChangeRecord[] records = wrapper.read(Types.BLOCK_CHANGE_ARRAY);
 
-					wrapper.write(Types.SHORT, (short) records.length); // Record count
-					wrapper.write(Types.INT, records.length * 4); // Data array length (position + block id)
+                    wrapper.write(Types.SHORT, (short) records.length); // Record count
+                    wrapper.write(Types.INT, records.length * 4); // Data array length (position + block id)
 
-					for (BlockChangeRecord record : records) {
-						wrapper.write(Types.SHORT, (short) (record.getSectionX() << 12 | record.getSectionZ() << 8 | record.getY())); // Position
-						wrapper.write(Types.SHORT, (short) protocol.getItemRewriter().handleBlockId(record.getBlockId())); // Block id
-					}
-				});
-			}
-		});
+                    for (BlockChangeRecord record : records) {
+                        wrapper.write(Types.SHORT, (short) (record.getSectionX() << 12 | record.getSectionZ() << 8 | record.getY())); // Position
+                        wrapper.write(Types.SHORT, (short) protocol.getItemRewriter().handleBlockId(record.getBlockId())); // Block id
+                    }
+                });
+            }
+        });
 
-		protocol.registerClientbound(ClientboundPackets1_8.BLOCK_EVENT, new PacketHandlers() {
-			@Override
-			public void register() {
-				map(Types.BLOCK_POSITION1_8, RewindTypes.SHORT_POSITION); // Position
-				map(Types.UNSIGNED_BYTE); // Type
-				map(Types.UNSIGNED_BYTE); // Data
-				map(Types.VAR_INT); // Block id
-			}
-		});
+        protocol.registerClientbound(ClientboundPackets1_8.BLOCK_EVENT, new PacketHandlers() {
+            @Override
+            public void register() {
+                map(Types.BLOCK_POSITION1_8, RewindTypes.SHORT_POSITION); // Position
+                map(Types.UNSIGNED_BYTE); // Type
+                map(Types.UNSIGNED_BYTE); // Data
+                map(Types.VAR_INT); // Block id
+            }
+        });
 
-		protocol.registerClientbound(ClientboundPackets1_8.BLOCK_DESTRUCTION, new PacketHandlers() {
-			@Override
-			public void register() {
-				map(Types.VAR_INT); // Entity id
-				map(Types.BLOCK_POSITION1_8, RewindTypes.INT_POSITION); // Position
-				map(Types.BYTE); // Progress
-			}
-		});
+        protocol.registerClientbound(ClientboundPackets1_8.BLOCK_DESTRUCTION, new PacketHandlers() {
+            @Override
+            public void register() {
+                map(Types.VAR_INT); // Entity id
+                map(Types.BLOCK_POSITION1_8, RewindTypes.INT_POSITION); // Position
+                map(Types.BYTE); // Progress
+            }
+        });
 
-		protocol.registerClientbound(ClientboundPackets1_8.MAP_BULK_CHUNK, wrapper -> {
-			final Chunk[] chunks = wrapper.read(BulkChunkType1_8.TYPE);
-			for (Chunk chunk : chunks) {
-				protocol.getItemRewriter().handleChunk(chunk);
-			}
+        protocol.registerClientbound(ClientboundPackets1_8.MAP_BULK_CHUNK, wrapper -> {
+            final Chunk[] chunks = wrapper.read(BulkChunkType1_8.TYPE);
+            for (Chunk chunk : chunks) {
+                protocol.getItemRewriter().handleChunk(chunk);
+            }
 
-			wrapper.write(BulkChunkType1_7_6.TYPE, chunks);
-		});
+            wrapper.write(BulkChunkType1_7_6.TYPE, chunks);
+        });
 
-		protocol.registerClientbound(ClientboundPackets1_8.LEVEL_EVENT, new PacketHandlers() {
-			@Override
-			public void register() {
-				map(Types.INT); // Effect id
-				map(Types.BLOCK_POSITION1_8, RewindTypes.BYTE_POSITION); // Position
-				map(Types.INT); // Data
-				map(Types.BOOLEAN); // Disable relative volume
-			}
-		});
+        protocol.registerClientbound(ClientboundPackets1_8.LEVEL_EVENT, new PacketHandlers() {
+            @Override
+            public void register() {
+                map(Types.INT); // Effect id
+                map(Types.BLOCK_POSITION1_8, RewindTypes.BYTE_POSITION); // Position
+                map(Types.INT); // Data
+                map(Types.BOOLEAN); // Disable relative volume
+            }
+        });
 
-		protocol.registerClientbound(ClientboundPackets1_8.LEVEL_PARTICLES, new PacketHandlers() {
-			@Override
-			public void register() {
-				handler(wrapper -> {
-					final int particleId = wrapper.read(Types.INT); // Particle id
-					Particles1_8 particle = Particles1_8.find(particleId);
-					if (particle == null) {
-						particle = Particles1_8.CRIT;
-					}
-					wrapper.write(Types.STRING, particle.name); // Particle name
+        protocol.registerClientbound(ClientboundPackets1_8.LEVEL_PARTICLES, new PacketHandlers() {
+            @Override
+            public void register() {
+                handler(wrapper -> {
+                    final int particleId = wrapper.read(Types.INT); // Particle id
+                    Particles1_8 particle = Particles1_8.find(particleId);
+                    if (particle == null) {
+                        particle = Particles1_8.CRIT;
+                    }
+                    wrapper.write(Types.STRING, particle.name); // Particle name
 
-				});
-				read(Types.BOOLEAN); // Long distance
-				map(Types.FLOAT); // X
-				map(Types.FLOAT); // Y
-				map(Types.FLOAT); // Z
-				map(Types.FLOAT); // Offset x
-				map(Types.FLOAT); // Offset y
-				map(Types.FLOAT); // Offset z
-				map(Types.FLOAT); // Particle data
-				map(Types.INT); // Particle count
-				handler(wrapper -> {
-					String name = wrapper.get(Types.STRING, 0);
-					Particles1_8 particle = Particles1_8.find(name);
+                });
+                read(Types.BOOLEAN); // Long distance
+                map(Types.FLOAT); // X
+                map(Types.FLOAT); // Y
+                map(Types.FLOAT); // Z
+                map(Types.FLOAT); // Offset x
+                map(Types.FLOAT); // Offset y
+                map(Types.FLOAT); // Offset z
+                map(Types.FLOAT); // Particle data
+                map(Types.INT); // Particle count
+                handler(wrapper -> {
+                    String name = wrapper.get(Types.STRING, 0);
+                    Particles1_8 particle = Particles1_8.find(name);
 
-					if (particle == Particles1_8.ICON_CRACK || particle == Particles1_8.BLOCK_CRACK || particle == Particles1_8.BLOCK_DUST) {
-						int id = wrapper.read(Types.VAR_INT);
-						int data = particle == Particles1_8.ICON_CRACK ? wrapper.read(Types.VAR_INT) : id / 4096;
-						id %= 4096;
-						if (id >= 256 && id <= 422 || id >= 2256 && id <= 2267) {  //item
-							particle = Particles1_8.ICON_CRACK;
-						} else if (id >= 0 && id <= 164 || id >= 170 && id <= 175) {
-							if (particle == Particles1_8.ICON_CRACK)
-								particle = Particles1_8.BLOCK_CRACK;
-						} else {
-							wrapper.cancel();
-							return;
-						}
-						name = particle.name + "_" + id + "_" + data;
-					}
+                    if (particle == Particles1_8.ICON_CRACK || particle == Particles1_8.BLOCK_CRACK || particle == Particles1_8.BLOCK_DUST) {
+                        int id = wrapper.read(Types.VAR_INT);
+                        int data = particle == Particles1_8.ICON_CRACK ? wrapper.read(Types.VAR_INT) : id / 4096;
+                        id %= 4096;
+                        if (id >= 256 && id <= 422 || id >= 2256 && id <= 2267) {  //item
+                            particle = Particles1_8.ICON_CRACK;
+                        } else if (id >= 0 && id <= 164 || id >= 170 && id <= 175) {
+                            if (particle == Particles1_8.ICON_CRACK)
+                                particle = Particles1_8.BLOCK_CRACK;
+                        } else {
+                            wrapper.cancel();
+                            return;
+                        }
+                        name = particle.name + "_" + id + "_" + data;
+                    }
 
-					wrapper.set(Types.STRING, 0, name);
-				});
-			}
-		});
+                    wrapper.set(Types.STRING, 0, name);
+                });
+            }
+        });
 
-		protocol.registerClientbound(ClientboundPackets1_8.UPDATE_SIGN, new PacketHandlers() {
-			@Override
-			public void register() {
-				map(Types.BLOCK_POSITION1_8, RewindTypes.SHORT_POSITION); // position
-				handler(wrapper -> {
-					for (int i = 0; i < 4; i++) {
-						String line = wrapper.read(Types.STRING);
-						line = ChatUtil.jsonToLegacy(line);
-						line = ChatUtil.removeUnusedColor(line, '0');
+        protocol.registerClientbound(ClientboundPackets1_8.UPDATE_SIGN, new PacketHandlers() {
+            @Override
+            public void register() {
+                map(Types.BLOCK_POSITION1_8, RewindTypes.SHORT_POSITION); // position
+                handler(wrapper -> {
+                    for (int i = 0; i < 4; i++) {
+                        String line = wrapper.read(Types.STRING);
+                        line = ChatUtil.jsonToLegacy(line);
+                        line = ChatUtil.removeUnusedColor(line, '0');
 
-						if (line.length() > 15) {
-							line = ChatColorUtil.stripColor(line);
-							if (line.length() > 15) line = line.substring(0, 15);
-						}
-						wrapper.write(Types.STRING, line);
-					}
-				});
-			}
-		});
+                        if (line.length() > 15) {
+                            line = ChatColorUtil.stripColor(line);
+                            if (line.length() > 15) line = line.substring(0, 15);
+                        }
+                        wrapper.write(Types.STRING, line);
+                    }
+                });
+            }
+        });
 
-		protocol.registerClientbound(ClientboundPackets1_8.MAP_ITEM_DATA, wrapper -> {
-			wrapper.cancel();
-			final int id = wrapper.read(Types.VAR_INT);
-			final byte scale = wrapper.read(Types.BYTE);
+        protocol.registerClientbound(ClientboundPackets1_8.MAP_ITEM_DATA, wrapper -> {
+            wrapper.cancel();
+            final int id = wrapper.read(Types.VAR_INT);
+            final byte scale = wrapper.read(Types.BYTE);
 
-			final int iconCount = wrapper.read(Types.VAR_INT);
-			byte[] icons = new byte[iconCount * 4];
-			for (int i = 0; i < iconCount; i++) {
-				final int directionAndType = wrapper.read(Types.BYTE);
+            final int iconCount = wrapper.read(Types.VAR_INT);
+            byte[] icons = new byte[iconCount * 4];
+            for (int i = 0; i < iconCount; i++) {
+                final int directionAndType = wrapper.read(Types.BYTE);
 
-				icons[i * 4] = (byte) (directionAndType >> 4 & 0xF);
-				icons[i * 4 + 1] = wrapper.read(Types.BYTE); // x
-				icons[i * 4 + 2] = wrapper.read(Types.BYTE); // z
-				icons[i * 4 + 3] = (byte) (directionAndType & 0xF);
-			}
-			final short columns = wrapper.read(Types.UNSIGNED_BYTE);
-			if (columns > 0) {
-				final short rows = wrapper.read(Types.UNSIGNED_BYTE);
-				final short x = wrapper.read(Types.UNSIGNED_BYTE);
-				final short z = wrapper.read(Types.UNSIGNED_BYTE);
+                icons[i * 4] = (byte) (directionAndType >> 4 & 0xF);
+                icons[i * 4 + 1] = wrapper.read(Types.BYTE); // x
+                icons[i * 4 + 2] = wrapper.read(Types.BYTE); // z
+                icons[i * 4 + 3] = (byte) (directionAndType & 0xF);
+            }
+            final short columns = wrapper.read(Types.UNSIGNED_BYTE);
+            if (columns > 0) {
+                final short rows = wrapper.read(Types.UNSIGNED_BYTE);
+                final short x = wrapper.read(Types.UNSIGNED_BYTE);
+                final short z = wrapper.read(Types.UNSIGNED_BYTE);
 
-				final byte[] data = wrapper.read(Types.BYTE_ARRAY_PRIMITIVE);
-				for (int column = 0; column < columns; column++) {
-					byte[] columnData = new byte[rows + 3];
-					columnData[0] = 0;
-					columnData[1] = (byte) (x + column);
-					columnData[2] = (byte) z;
+                final byte[] data = wrapper.read(Types.BYTE_ARRAY_PRIMITIVE);
+                for (int column = 0; column < columns; column++) {
+                    byte[] columnData = new byte[rows + 3];
+                    columnData[0] = 0;
+                    columnData[1] = (byte) (x + column);
+                    columnData[2] = (byte) z;
 
-					for (int i = 0; i < rows; i++) {
-						columnData[i + 3] = data[column + i * columns];
-					}
+                    for (int i = 0; i < rows; i++) {
+                        columnData[i + 3] = data[column + i * columns];
+                    }
 
-					final PacketWrapper mapData = PacketWrapper.create(ClientboundPackets1_8.MAP_ITEM_DATA, wrapper.user());
-					mapData.write(Types.VAR_INT, id); // map id
-					mapData.write(Types.SHORT, (short) columnData.length); // data length
-					mapData.write(new FixedByteArrayType(columnData.length), columnData); // data
+                    final PacketWrapper mapData = PacketWrapper.create(ClientboundPackets1_8.MAP_ITEM_DATA, wrapper.user());
+                    mapData.write(Types.VAR_INT, id); // map id
+                    mapData.write(Types.SHORT, (short) columnData.length); // data length
+                    mapData.write(new FixedByteArrayType(columnData.length), columnData); // data
 
-					mapData.send(Protocol1_8To1_7_6_10.class);
-				}
-			}
+                    mapData.send(Protocol1_8To1_7_6_10.class);
+                }
+            }
 
-			if (iconCount > 0) {
-				final byte[] iconData = new byte[iconCount * 3 + 1];
-				iconData[0] = 1;
-				for (int i = 0; i < iconCount; i++) {
-					iconData[i * 3 + 1] = (byte) (icons[i * 4] << 4 | icons[i * 4 + 3] & 0xF);
-					iconData[i * 3 + 2] = icons[i * 4 + 1];
-					iconData[i * 3 + 3] = icons[i * 4 + 2];
-				}
+            if (iconCount > 0) {
+                final byte[] iconData = new byte[iconCount * 3 + 1];
+                iconData[0] = 1;
+                for (int i = 0; i < iconCount; i++) {
+                    iconData[i * 3 + 1] = (byte) (icons[i * 4] << 4 | icons[i * 4 + 3] & 0xF);
+                    iconData[i * 3 + 2] = icons[i * 4 + 1];
+                    iconData[i * 3 + 3] = icons[i * 4 + 2];
+                }
 
-				final PacketWrapper mapData = PacketWrapper.create(ClientboundPackets1_8.MAP_ITEM_DATA, wrapper.user());
-				mapData.write(Types.VAR_INT, id); // map id
-				mapData.write(Types.SHORT, (short) iconData.length); // data length
-				mapData.write(new FixedByteArrayType(iconData.length), iconData); // data
+                final PacketWrapper mapData = PacketWrapper.create(ClientboundPackets1_8.MAP_ITEM_DATA, wrapper.user());
+                mapData.write(Types.VAR_INT, id); // map id
+                mapData.write(Types.SHORT, (short) iconData.length); // data length
+                mapData.write(new FixedByteArrayType(iconData.length), iconData); // data
 
-				mapData.send(Protocol1_8To1_7_6_10.class);
-			}
+                mapData.send(Protocol1_8To1_7_6_10.class);
+            }
 
-			// Update scale
-			final PacketWrapper mapData = PacketWrapper.create(ClientboundPackets1_8.MAP_ITEM_DATA, wrapper.user());
-			mapData.write(Types.VAR_INT, id); // map id
-			mapData.write(Types.SHORT, (short) 2); // data length
-			mapData.write(new FixedByteArrayType(2), new byte[]{2, scale}); // data
+            // Update scale
+            final PacketWrapper mapData = PacketWrapper.create(ClientboundPackets1_8.MAP_ITEM_DATA, wrapper.user());
+            mapData.write(Types.VAR_INT, id); // map id
+            mapData.write(Types.SHORT, (short) 2); // data length
+            mapData.write(new FixedByteArrayType(2), new byte[]{2, scale}); // data
 
-			mapData.send(Protocol1_8To1_7_6_10.class);
-		});
+            mapData.send(Protocol1_8To1_7_6_10.class);
+        });
 
-		protocol.registerClientbound(ClientboundPackets1_8.BLOCK_ENTITY_DATA, new PacketHandlers() {
-			@Override
-			public void register() {
-				map(Types.BLOCK_POSITION1_8, RewindTypes.SHORT_POSITION); // position
-				map(Types.UNSIGNED_BYTE); // action
-				map(Types.NAMED_COMPOUND_TAG, RewindTypes.COMPRESSED_NBT); // nbt
-			}
-		});
+        protocol.registerClientbound(ClientboundPackets1_8.BLOCK_ENTITY_DATA, new PacketHandlers() {
+            @Override
+            public void register() {
+                map(Types.BLOCK_POSITION1_8, RewindTypes.SHORT_POSITION); // position
+                map(Types.UNSIGNED_BYTE); // action
+                map(Types.NAMED_COMPOUND_TAG, RewindTypes.COMPRESSED_NBT); // nbt
+            }
+        });
 
-		protocol.cancelClientbound(ClientboundPackets1_8.CHANGE_DIFFICULTY);
+        protocol.cancelClientbound(ClientboundPackets1_8.CHANGE_DIFFICULTY);
 
-		protocol.registerClientbound(ClientboundPackets1_8.SET_BORDER, null, wrapper -> {
-			final WorldBorderEmulator emulator = wrapper.user().get(WorldBorderEmulator.class);
-			wrapper.cancel();
+        protocol.registerClientbound(ClientboundPackets1_8.SET_BORDER, null, wrapper -> {
+            final WorldBorderEmulator emulator = wrapper.user().get(WorldBorderEmulator.class);
+            wrapper.cancel();
 
-			final int action = wrapper.read(Types.VAR_INT);
-			if (action == 0) { // set size
-				emulator.setSize(wrapper.read(Types.DOUBLE)); // radius
-			} else if (action == 1) { // lerp size
-				emulator.lerpSize(wrapper.read(Types.DOUBLE), wrapper.read(Types.DOUBLE), wrapper.read(Types.VAR_LONG)); // old radius, new radius, speed
-			} else if (action == 2) { // set center
-				emulator.setCenter(wrapper.read(Types.DOUBLE), wrapper.read(Types.DOUBLE)); // x, z
-			} else if (action == 3) { // initialize
-				emulator.init(
-					wrapper.read(Types.DOUBLE), wrapper.read(Types.DOUBLE), // x, z
-					wrapper.read(Types.DOUBLE), wrapper.read(Types.DOUBLE), // old radius, new radius
-					wrapper.read(Types.VAR_LONG) // speed
-				);
-			}
-		});
-	}
+            final int action = wrapper.read(Types.VAR_INT);
+            if (action == 0) { // set size
+                emulator.setSize(wrapper.read(Types.DOUBLE)); // radius
+            } else if (action == 1) { // lerp size
+                emulator.lerpSize(wrapper.read(Types.DOUBLE), wrapper.read(Types.DOUBLE), wrapper.read(Types.VAR_LONG)); // old radius, new radius, speed
+            } else if (action == 2) { // set center
+                emulator.setCenter(wrapper.read(Types.DOUBLE), wrapper.read(Types.DOUBLE)); // x, z
+            } else if (action == 3) { // initialize
+                emulator.init(
+                    wrapper.read(Types.DOUBLE), wrapper.read(Types.DOUBLE), // x, z
+                    wrapper.read(Types.DOUBLE), wrapper.read(Types.DOUBLE), // old radius, new radius
+                    wrapper.read(Types.VAR_LONG) // speed
+                );
+            }
+        });
+    }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_8to1_7_6_10/storage/CompressionStatusTracker.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -24,9 +24,9 @@ import com.viaversion.viaversion.api.connection.UserConnection;
  * @see com.viaversion.viarewind.protocol.v1_8to1_7_6_10.provider.CompressionHandlerProvider
  */
 public class CompressionStatusTracker extends StoredObject {
-	public boolean removeCompression = false;
+    public boolean removeCompression = false;
 
-	public CompressionStatusTracker(UserConnection user) {
-		super(user);
-	}
+    public CompressionStatusTracker(UserConnection user) {
+        super(user);
+    }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_8to1_7_6_10/storage/EntityTracker1_8.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -22,6 +22,7 @@ import com.viaversion.viarewind.protocol.v1_7_6_10to1_7_2_5.packet.ServerboundPa
 import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.Protocol1_8To1_7_6_10;
 import com.viaversion.viarewind.protocol.v1_8to1_7_6_10.data.VirtualHologramEntity;
 import com.viaversion.viaversion.api.connection.UserConnection;
+import com.viaversion.viaversion.api.data.entity.TrackedEntity;
 import com.viaversion.viaversion.api.minecraft.entities.EntityType;
 import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_8;
 import com.viaversion.viaversion.api.minecraft.entitydata.EntityData;
@@ -36,16 +37,27 @@ import com.viaversion.viaversion.libs.fastutil.ints.Int2ObjectMap;
 import com.viaversion.viaversion.libs.fastutil.objects.Object2IntMap;
 import com.viaversion.viaversion.libs.fastutil.objects.Object2IntOpenHashMap;
 import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ClientboundPackets1_8;
-
-import java.util.*;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+import java.util.UUID;
 import java.util.logging.Level;
 
+import com.viaversion.viarewind.api.minecraft.entitydata.EntityDataTypes1_7_6_10;
+import com.viaversion.viarewind.api.type.RewindTypes;
+import com.viaversion.viarewind.protocol.v1_7_6_10to1_7_2_5.packet.ClientboundPackets1_7_2_5;
+
 public class EntityTracker1_8 extends EntityTrackerBase {
 
     private final Int2ObjectMap<VirtualHologramEntity> holograms = new Int2ObjectArrayMap<>();
+    private final Int2IntMap extraHologramIds = new Int2IntArrayMap();
     private final Int2IntMap vehicles = new Int2IntArrayMap();
     private final Int2ObjectMap<UUID> entityIdToUUID = new Int2ObjectArrayMap<>();
     private final Object2IntMap<UUID> entityUUIDToId = new Object2IntOpenHashMap<>();
+    private final Int2IntMap playerNametagHiderEntities = new Int2IntArrayMap();
 
     private final List<EntityData> entityData = new ArrayList<>();
 
@@ -57,35 +69,41 @@ public class EntityTracker1_8 extends EntityTrackerBase {
     }
 
     @Override
-    public void addEntity(int id, EntityType type) {
-        super.addEntity(id, type);
+    public TrackedEntity addEntity(int id, EntityType type) {
         if (type == EntityTypes1_8.EntityType.ARMOR_STAND) {
             holograms.put(id, new VirtualHologramEntity(user(), id));
         }
+        return super.addEntity(id, type);
     }
 
     @Override
-    public void removeEntity(int entityId) {
-        super.removeEntity(entityId);
-
+    public TrackedEntity removeEntity(int entityId) {
         final VirtualHologramEntity hologram = holograms.get(entityId);
         if (hologram != null) {
             hologram.deleteEntity();
             holograms.remove(entityId);
         }
 
+        if (playerNametagHiderEntities.containsKey(entityId)) {
+            despawnNametagHiderEntity(entityId);
+        }
+
         if (entityIdToUUID.containsKey(entityId)) {
             final UUID playerId = entityIdToUUID.remove(entityId);
 
             entityUUIDToId.removeInt(playerId);
             user().get(PlayerSessionStorage.class).getPlayerEquipment().remove(playerId);
         }
+        return super.removeEntity(entityId);
     }
 
     @Override
     public void clearEntities() {
         super.clearEntities();
+        holograms.clear();
+        extraHologramIds.clear();
         vehicles.clear();
+        playerNametagHiderEntities.clear();
     }
 
     @Override
@@ -152,6 +170,11 @@ public class EntityTracker1_8 extends EntityTrackerBase {
         } else {
             vehicles.put(vehicleId, passengerId);
         }
+
+        // Re-evaluate nametag visibility when a player entity's passenger changes
+        if (vehicleId != -1 && entityIdToUUID.containsKey(vehicleId)) {
+            checkNametagVisibility(vehicleId);
+        }
     }
 
     protected void attachEntity(final int target) {
@@ -182,10 +205,111 @@ public class EntityTracker1_8 extends EntityTrackerBase {
         }
     }
 
+    public void checkNametagVisibility(final int entityId) {
+        if (!entityIdToUUID.containsKey(entityId)) {
+            return;
+        }
+        final boolean shouldHide = isPlayerNametagHidden(entityId);
+        final boolean hasServerPassenger = getPassenger(entityId) != -1;
+        final boolean hasSkull = playerNametagHiderEntities.containsKey(entityId);
+
+        if (shouldHide && !hasServerPassenger && !hasSkull) {
+            spawnNametagHiderEntity(entityId);
+        } else if ((!shouldHide || hasServerPassenger) && hasSkull) {
+            despawnNametagHiderEntity(entityId);
+        }
+    }
+
+    public void checkNametagVisbility(final String username) {
+        final GameProfileStorage profileStorage = user().get(GameProfileStorage.class);
+        final List<GameProfileStorage.GameProfile> profiles = profileStorage.get(username, false);
+
+        for (GameProfileStorage.GameProfile profile : profiles) {
+            final int entityId = getPlayerEntityId(profile.uuid);
+            if (entityId == -1) {
+                return;
+            }
+
+            checkNametagVisibility(entityId);
+        }
+    }
+
+    private boolean isPlayerNametagHidden(final int entityId) {
+        final UUID uuid = entityIdToUUID.get(entityId);
+        if (uuid == null) {
+            return false;
+        }
+        final GameProfileStorage profileStorage = user().get(GameProfileStorage.class);
+        final GameProfileStorage.GameProfile profile = profileStorage.get(uuid);
+        if (profile == null) {
+            return false;
+        }
+        return user().get(ScoreboardTracker.class).isNametagHidden(profile.name);
+    }
+
+    private int getNametagHiderEntityId(final int playerEntityId) {
+        return Integer.MAX_VALUE - 32000 - playerEntityId;
+    }
+
+    private void spawnNametagHiderEntity(final int playerEntityId) {
+        final int entityId = getNametagHiderEntityId(playerEntityId);
+        playerNametagHiderEntities.put(playerEntityId, entityId);
+
+        final List<EntityData> mobData = new ArrayList<>();
+        mobData.add(new EntityData(0, EntityDataTypes1_7_6_10.BYTE, (byte) 0x20));
+        mobData.add(new EntityData(16, EntityDataTypes1_7_6_10.BYTE, (byte) 0));
+
+        final PacketWrapper spawnMob = PacketWrapper.create(ClientboundPackets1_7_2_5.ADD_MOB, user());
+        spawnMob.write(Types.VAR_INT, entityId);
+        spawnMob.write(Types.UNSIGNED_BYTE, (short) EntityTypes1_8.EntityType.MAGMA_CUBE.getId());
+        spawnMob.write(Types.INT, 0); // X
+        spawnMob.write(Types.INT, 0); // Y
+        spawnMob.write(Types.INT, 0); // Z
+        spawnMob.write(Types.BYTE, (byte) 0); // Yaw
+        spawnMob.write(Types.BYTE, (byte) 0); // Pitch
+        spawnMob.write(Types.BYTE, (byte) 0); // Head yaw
+        spawnMob.write(Types.SHORT, (short) 0); // Velocity x
+        spawnMob.write(Types.SHORT, (short) 0); // Velocity y
+        spawnMob.write(Types.SHORT, (short) 0); // Velocity z
+        spawnMob.write(RewindTypes.ENTITY_DATA_LIST1_7, mobData);
+        spawnMob.scheduleSend(Protocol1_8To1_7_6_10.class);
+
+        final PacketWrapper attach = PacketWrapper.create(ClientboundPackets1_7_2_5.SET_ENTITY_LINK, user());
+        attach.write(Types.INT, entityId);
+        attach.write(Types.INT, playerEntityId);
+        attach.write(Types.BOOLEAN, false);
+        attach.scheduleSend(Protocol1_8To1_7_6_10.class);
+    }
+
+    private void despawnNametagHiderEntity(final int playerEntityId) {
+        if (!playerNametagHiderEntities.containsKey(playerEntityId)) return;
+        final int mobId = playerNametagHiderEntities.remove(playerEntityId);
+
+        final PacketWrapper despawn = PacketWrapper.create(ClientboundPackets1_7_2_5.REMOVE_ENTITIES, user());
+        despawn.write(Types.BYTE, (byte) 1);
+        despawn.write(Types.INT, mobId);
+        despawn.scheduleSend(Protocol1_8To1_7_6_10.class);
+    }
+
     public Int2ObjectMap<VirtualHologramEntity> getHolograms() {
         return holograms;
     }
 
+    public void setExtraHologramId(final int entityId, final int extraId) {
+        extraHologramIds.put(extraId, entityId);
+    }
+
+    public void removeExtraHologramId(int extraId) {
+        extraHologramIds.remove(extraId);
+    }
+
+    public int getHologramIdWithExtra(final int id) {
+        if (holograms.containsKey(id)) {
+            return id;
+        }
+        return extraHologramIds.getOrDefault(id, -1);
+    }
+
     public boolean isSpectator() {
         return clientEntityGameMode == 3;
     }

common/src/main/java/com/viaversion/viarewind/protocol/v1_8to1_7_6_10/storage/GameProfileStorage.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -17,129 +17,135 @@
  */
 package com.viaversion.viarewind.protocol.v1_8to1_7_6_10.storage;
 
+import com.google.common.collect.ArrayListMultimap;
+import com.google.common.collect.HashMultimap;
+import com.google.common.collect.ListMultimap;
+import com.google.common.collect.Multimap;
+import com.viaversion.nbt.tag.CompoundTag;
+import com.viaversion.nbt.tag.ListTag;
+import com.viaversion.nbt.tag.StringTag;
 import com.viaversion.viarewind.utils.ChatUtil;
 import com.viaversion.viaversion.api.connection.StoredObject;
 import com.viaversion.viaversion.api.connection.UserConnection;
 import com.viaversion.viaversion.api.minecraft.item.DataItem;
 import com.viaversion.viaversion.api.minecraft.item.Item;
-import com.viaversion.nbt.tag.CompoundTag;
-import com.viaversion.nbt.tag.ListTag;
-import com.viaversion.nbt.tag.StringTag;
 import com.viaversion.viaversion.util.ChatColorUtil;
-
-import java.util.*;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
 
 public class GameProfileStorage extends StoredObject {
-	private final Map<UUID, GameProfile> properties = new HashMap<>();
+    private final Map<UUID, GameProfile> properties = new HashMap<>();
+    private final ListMultimap<String, GameProfile> nameToProfile = ArrayListMultimap.create();
 
-	public GameProfileStorage(UserConnection user) {
-		super(user);
-	}
+    public GameProfileStorage(UserConnection user) {
+        super(user);
+    }
 
-	public GameProfile put(UUID uuid, String name) {
-		GameProfile gameProfile = new GameProfile(uuid, name);
-		properties.put(uuid, gameProfile);
-		return gameProfile;
-	}
+    public GameProfile put(UUID uuid, String name, String displayName, int ping, int gamemode) {
+        GameProfile gameProfile = new GameProfile(uuid, name, displayName, ping, gamemode);
+        properties.put(uuid, gameProfile);
+        nameToProfile.put(name, gameProfile);
+        return gameProfile;
+    }
 
-	public GameProfile get(UUID uuid) {
-		return properties.get(uuid);
-	}
+    public GameProfile get(UUID uuid) {
+        return properties.get(uuid);
+    }
 
-	public GameProfile get(String name, boolean ignoreCase) {
-		if (ignoreCase) name = name.toLowerCase();
+    public List<GameProfile> get(String name, boolean ignoreCase) {
+        if (ignoreCase) name = name.toLowerCase();
+        return nameToProfile.get(name);
+    }
 
-		for (GameProfile profile : properties.values()) {
-			if (profile.name == null) continue;
+    public List<GameProfile> getAllWithPrefix(String prefix, boolean ignoreCase) {
+        if (ignoreCase) prefix = prefix.toLowerCase();
 
-			String n = ignoreCase ? profile.name.toLowerCase() : profile.name;
+        ArrayList<GameProfile> profiles = new ArrayList<>();
 
-			if (n.equals(name)) {
-				return profile;
-			}
-		}
-		return null;
-	}
+        for (GameProfile profile : properties.values()) {
+            if (profile.name == null) continue;
 
-	public List<GameProfile> getAllWithPrefix(String prefix, boolean ignoreCase) {
-		if (ignoreCase) prefix = prefix.toLowerCase();
+            String n = ignoreCase ? profile.name.toLowerCase() : profile.name;
 
-		ArrayList<GameProfile> profiles = new ArrayList<>();
+            if (n.startsWith(prefix)) profiles.add(profile);
+        }
 
-		for (GameProfile profile : properties.values()) {
-			if (profile.name == null) continue;
+        return profiles;
+    }
 
-			String n = ignoreCase ? profile.name.toLowerCase() : profile.name;
-
-			if (n.startsWith(prefix)) profiles.add(profile);
-		}
-
-		return profiles;
-	}
-
-	public GameProfile remove(UUID uuid) {
-		return properties.remove(uuid);
-	}
+    public GameProfile remove(UUID uuid) {
+        GameProfile removedProfile = properties.remove(uuid);
+        if (removedProfile != null) {
+            nameToProfile.get(removedProfile.name).remove(removedProfile);
+        }
+        return removedProfile;
+    }
 
 
-	public static class GameProfile {
-		public final String name;
-		public final UUID uuid;
-		public String displayName;
-		public int ping;
-		public List<Property> properties = new ArrayList<>();
-		public int gamemode = 0;
+    public static class GameProfile {
+        public final UUID uuid;
+        public final String name;
+        public String displayName;
+        public List<Property> properties = new ArrayList<>();
+        public int ping;
+        public int gamemode = 0;
 
-		public GameProfile(UUID uuid, String name) {
-			this.name = name;
-			this.uuid = uuid;
-		}
+        public GameProfile(UUID uuid, String name, String displayName, int ping, int gamemode) {
+            this.uuid = uuid;
+            this.name = name;
+            this.displayName = displayName;
+            this.ping = ping;
+            this.gamemode = gamemode;
+        }
 
-		public Item getSkull() {
-			CompoundTag tag = new CompoundTag();
-			CompoundTag ownerTag = new CompoundTag();
-			tag.put("SkullOwner", ownerTag);
-			ownerTag.put("Id", new StringTag(uuid.toString()));
-			CompoundTag properties = new CompoundTag();
-			ownerTag.put("Properties", properties);
-			ListTag textures = new ListTag(CompoundTag.class);
-			properties.put("textures", textures);
-			for (Property property : this.properties) {
-				if (property.name.equals("textures")) {
-					CompoundTag textureTag = new CompoundTag();
-					textureTag.put("Value", new StringTag(property.value));
-					if (property.signature != null) {
-						textureTag.put("Signature", new StringTag(property.signature));
-					}
-					textures.add(textureTag);
-				}
-			}
+        public Item getSkull() {
+            CompoundTag tag = new CompoundTag();
+            CompoundTag ownerTag = new CompoundTag();
+            tag.put("SkullOwner", ownerTag);
+            ownerTag.put("Id", new StringTag(uuid.toString()));
+            CompoundTag properties = new CompoundTag();
+            ownerTag.put("Properties", properties);
+            ListTag textures = new ListTag(CompoundTag.class);
+            properties.put("textures", textures);
+            for (Property property : this.properties) {
+                if (property.name.equals("textures")) {
+                    CompoundTag textureTag = new CompoundTag();
+                    textureTag.put("Value", new StringTag(property.value));
+                    if (property.signature != null) {
+                        textureTag.put("Signature", new StringTag(property.signature));
+                    }
+                    textures.add(textureTag);
+                }
+            }
 
-			return new DataItem(397, (byte) 1, (short) 3, tag);
-		}
+            return new DataItem(397, (byte) 1, (short) 3, tag);
+        }
 
-		public String getDisplayName() {
-			String displayName = this.displayName == null ? name : this.displayName;
-			if (displayName.length() > 16) displayName = ChatUtil.removeUnusedColor(displayName, 'f');
-			if (displayName.length() > 16) displayName = ChatColorUtil.stripColor(displayName);
-			if (displayName.length() > 16) displayName = displayName.substring(0, 16);
-			return displayName;
-		}
+        public String getLegacyDisplayName() {
+            String displayName = this.displayName == null ? name : this.displayName;
+            if (displayName.length() > 16) displayName = ChatUtil.removeUnusedColor(displayName, 'f');
+            if (displayName.length() > 16) displayName = ChatColorUtil.stripColor(displayName);
+            if (displayName.length() > 16) displayName = displayName.substring(0, 16);
+            return displayName;
+        }
 
-		public void setDisplayName(String displayName) {
-			this.displayName = displayName;
-		}
-	}
+        public void setDisplayName(String displayName) {
+            this.displayName = displayName;
+        }
+    }
 
-	public static class Property {
-		public final String name;
-		public final String value;
-		public final String signature;
+    public static class Property {
+        public final String name;
+        public final String value;
+        public final String signature;
 
-		public Property(String name, String value, String signature) {
-			this.name = name;
-			this.value = value;
-			this.signature = signature;
-		}
-	}
+        public Property(String name, String value, String signature) {
+            this.name = name;
+            this.value = value;
+            this.signature = signature;
+        }
+    }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_8to1_7_6_10/storage/InventoryTracker.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -19,66 +19,65 @@ package com.viaversion.viarewind.protocol.v1_8to1_7_6_10.storage;
 
 import com.viaversion.viaversion.api.connection.StoredObject;
 import com.viaversion.viaversion.api.connection.UserConnection;
-
 import java.util.HashMap;
 import java.util.Map;
 
 public class InventoryTracker extends StoredObject {
-	public static final Map<String, Integer> WINDOW_TYPE_REGISTRY = new HashMap<>();
+    public static final Map<String, Integer> WINDOW_TYPE_REGISTRY = new HashMap<>();
 
-	static {
-		WINDOW_TYPE_REGISTRY.put("minecraft:container", 0);
-		WINDOW_TYPE_REGISTRY.put("minecraft:chest", 0);
-		WINDOW_TYPE_REGISTRY.put("minecraft:crafting_table", 1);
-		WINDOW_TYPE_REGISTRY.put("minecraft:furnace", 2);
-		WINDOW_TYPE_REGISTRY.put("minecraft:dispenser", 3);
-		WINDOW_TYPE_REGISTRY.put("minecraft:enchanting_table", 4);
-		WINDOW_TYPE_REGISTRY.put("minecraft:brewing_stand", 5);
-		WINDOW_TYPE_REGISTRY.put("minecraft:villager", 6);
-		WINDOW_TYPE_REGISTRY.put("minecraft:beacon", 7);
-		WINDOW_TYPE_REGISTRY.put("minecraft:anvil", 8);
-		WINDOW_TYPE_REGISTRY.put("minecraft:hopper", 9);
-		WINDOW_TYPE_REGISTRY.put("minecraft:dropper", 10);
-		WINDOW_TYPE_REGISTRY.put("EntityHorse", 11);
-	}
+    static {
+        WINDOW_TYPE_REGISTRY.put("minecraft:container", 0);
+        WINDOW_TYPE_REGISTRY.put("minecraft:chest", 0);
+        WINDOW_TYPE_REGISTRY.put("minecraft:crafting_table", 1);
+        WINDOW_TYPE_REGISTRY.put("minecraft:furnace", 2);
+        WINDOW_TYPE_REGISTRY.put("minecraft:dispenser", 3);
+        WINDOW_TYPE_REGISTRY.put("minecraft:enchanting_table", 4);
+        WINDOW_TYPE_REGISTRY.put("minecraft:brewing_stand", 5);
+        WINDOW_TYPE_REGISTRY.put("minecraft:villager", 6);
+        WINDOW_TYPE_REGISTRY.put("minecraft:beacon", 7);
+        WINDOW_TYPE_REGISTRY.put("minecraft:anvil", 8);
+        WINDOW_TYPE_REGISTRY.put("minecraft:hopper", 9);
+        WINDOW_TYPE_REGISTRY.put("minecraft:dropper", 10);
+        WINDOW_TYPE_REGISTRY.put("EntityHorse", 11);
+    }
 
-	private final HashMap<Short, Short> windowTypeMap = new HashMap<>();
-	private final HashMap<Short, FurnaceData> furnaceData = new HashMap<>();
+    private final HashMap<Short, Short> windowTypeMap = new HashMap<>();
+    private final HashMap<Short, FurnaceData> furnaceData = new HashMap<>();
 
-	public short levelCost = 0;
-	public short anvilId = -1;
+    public short levelCost = 0;
+    public short anvilId = -1;
 
-	public InventoryTracker(UserConnection user) {
-		super(user);
-	}
+    public InventoryTracker(UserConnection user) {
+        super(user);
+    }
 
-	public short get(short windowId) {
-		return windowTypeMap.getOrDefault(windowId, (short) -1);
-	}
+    public static short getInventoryType(String name) {
+        return WINDOW_TYPE_REGISTRY.getOrDefault(name, -1).shortValue();
+    }
 
-	public void remove(short windowId) {
-		windowTypeMap.remove(windowId);
-		furnaceData.remove(windowId);
-	}
+    public short get(short windowId) {
+        return windowTypeMap.getOrDefault(windowId, (short) -1);
+    }
 
-	public static short getInventoryType(String name) {
-		return WINDOW_TYPE_REGISTRY.getOrDefault(name, -1).shortValue();
-	}
+    public void remove(short windowId) {
+        windowTypeMap.remove(windowId);
+        furnaceData.remove(windowId);
+    }
 
-	public HashMap<Short, Short> getWindowTypeMap() {
-		return windowTypeMap;
-	}
+    public HashMap<Short, Short> getWindowTypeMap() {
+        return windowTypeMap;
+    }
 
-	public HashMap<Short, FurnaceData> getFurnaceData() {
-		return furnaceData;
-	}
+    public HashMap<Short, FurnaceData> getFurnaceData() {
+        return furnaceData;
+    }
 
-	public static class FurnaceData {
+    public static class FurnaceData {
 
-		public short fuelLeft = 0;
-		public short maxFuel = 0;
-		public short progress = 0;
-		public short maxProgress = 200;
-	}
+        public short fuelLeft = 0;
+        public short maxFuel = 0;
+        public short progress = 0;
+        public short maxProgress = 200;
+    }
 
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_8to1_7_6_10/storage/PlayerSessionStorage.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -20,78 +20,77 @@ package com.viaversion.viarewind.protocol.v1_8to1_7_6_10.storage;
 import com.viaversion.viaversion.api.connection.StoredObject;
 import com.viaversion.viaversion.api.connection.UserConnection;
 import com.viaversion.viaversion.api.minecraft.item.Item;
-
 import java.util.HashMap;
 import java.util.Map;
 import java.util.UUID;
 
 public class PlayerSessionStorage extends StoredObject {
 
-	// Player abilities
-	public boolean sprinting, allowFly, flying, invincible, creative;
-	public float flySpeed, walkSpeed;
+    // Player inventory
+    private final Map<UUID, Item[]> playerEquipment = new HashMap<>();
 
-	// Player position, rotation and data
-	private double posX, posY, posZ;
-	public double receivedPosY;
-	public float yaw, pitch;
-	public boolean onGround;
+    // Player abilities
+    public boolean sprinting, allowFly, flying, invincible, creative;
+    public float flySpeed, walkSpeed;
+    public double receivedPosY;
+    public float yaw, pitch;
+    public boolean onGround;
 
-	// Player inventory
-	private final Map<UUID, Item[]> playerEquipment = new HashMap<>();
+    // Player position, rotation and data
+    private double posX, posY, posZ;
 
-	public PlayerSessionStorage(UserConnection user) {
-		super(user);
-	}
+    public PlayerSessionStorage(UserConnection user) {
+        super(user);
+    }
 
-	public byte combineAbilities() {
-		byte flags = 0;
+    public byte combineAbilities() {
+        byte flags = 0;
 
-		if (invincible) flags |= 8;
-		if (allowFly) flags |= 4;
-		if (flying) flags |= 2;
-		if (creative) flags |= 1;
+        if (invincible) flags |= 8;
+        if (allowFly) flags |= 4;
+        if (flying) flags |= 2;
+        if (creative) flags |= 1;
 
-		return flags;
-	}
+        return flags;
+    }
 
-	public double getPosX() {
-		return posX;
-	}
+    public double getPosX() {
+        return posX;
+    }
 
-	public double getPosY() {
-		return posY;
-	}
+    public double getPosY() {
+        return posY;
+    }
 
-	public double getPosZ() {
-		return posZ;
-	}
+    public double getPosZ() {
+        return posZ;
+    }
 
-	public void setPos(double x, double y, double z) {
-		posX = x;
-		posY = y;
-		posZ = z;
-	}
+    public void setPos(double x, double y, double z) {
+        posX = x;
+        posY = y;
+        posZ = z;
+    }
 
-	public Item getPlayerEquipment(final UUID uuid, final int slot) {
-		final Item[] items = playerEquipment.get(uuid);
-		if (items == null || slot < 0 || slot >= items.length) {
-			return null;
-		}
+    public Item getPlayerEquipment(final UUID uuid, final int slot) {
+        final Item[] items = playerEquipment.get(uuid);
+        if (items == null || slot < 0 || slot >= items.length) {
+            return null;
+        }
 
-		return items[slot];
-	}
+        return items[slot];
+    }
 
-	public void setPlayerEquipment(final UUID uuid, final Item equipment, final int slot) {
-		final Item[] items = playerEquipment.computeIfAbsent(uuid, it -> new Item[5]);
-		if (slot < 0 || slot >= items.length) {
-			return;
-		}
+    public void setPlayerEquipment(final UUID uuid, final Item equipment, final int slot) {
+        final Item[] items = playerEquipment.computeIfAbsent(uuid, it -> new Item[5]);
+        if (slot < 0 || slot >= items.length) {
+            return;
+        }
 
-		items[slot] = equipment;
-	}
+        items[slot] = equipment;
+    }
 
-	public Map<UUID, Item[]> getPlayerEquipment() {
-		return playerEquipment;
-	}
+    public Map<UUID, Item[]> getPlayerEquipment() {
+        return playerEquipment;
+    }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_8to1_7_6_10/storage/ScoreboardTracker.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -23,163 +23,196 @@ import com.viaversion.viaversion.api.connection.StoredObject;
 import com.viaversion.viaversion.api.connection.UserConnection;
 import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
 import com.viaversion.viaversion.api.type.Types;
-
-import java.util.*;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
 
 public class ScoreboardTracker extends StoredObject {
-	private final HashMap<String, List<String>> teams = new HashMap<>();
-	private final HashSet<String> objectives = new HashSet<>();
-	private final HashMap<String, ScoreTeam> scoreTeams = new HashMap<>();
-	private final HashMap<String, Byte> teamColors = new HashMap<>();
-	private final HashSet<String> scoreTeamNames = new HashSet<>();
-	private String colorIndependentSidebar;
-	private final HashMap<Byte, String> colorDependentSidebar = new HashMap<>();
+    private final HashMap<String, List<String>> teams = new HashMap<>();
+    private final HashSet<String> objectives = new HashSet<>();
+    private final HashMap<String, ScoreTeam> scoreTeams = new HashMap<>();
+    private final HashMap<String, Byte> teamColors = new HashMap<>();
+    private final HashSet<String> scoreTeamNames = new HashSet<>();
+    private final HashMap<Byte, String> colorDependentSidebar = new HashMap<>();
+    private final HashMap<String, String> teamNameTagVisibilities = new HashMap<>();
+    private String colorIndependentSidebar;
 
-	public ScoreboardTracker(UserConnection user) {
-		super(user);
-	}
+    public ScoreboardTracker(UserConnection user) {
+        super(user);
+    }
 
-	public void addPlayerToTeam(String player, String team) {
-		teams.computeIfAbsent(team, key -> new ArrayList<>()).add(player);
-	}
+    public void addPlayerToTeam(String player, String team) {
+        teams.computeIfAbsent(team, key -> new ArrayList<>()).add(player);
+    }
 
-	public void setTeamColor(String team, Byte color) {
-		teamColors.put(team, color);
-	}
+    public void setTeamColor(String team, Byte color) {
+        teamColors.put(team, color);
+    }
 
-	public Optional<Byte> getTeamColor(String team) {
-		return Optional.ofNullable(teamColors.get(team));
-	}
+    public Optional<Byte> getTeamColor(String team) {
+        return Optional.ofNullable(teamColors.get(team));
+    }
 
-	public void addTeam(String team) {
-		teams.computeIfAbsent(team, key -> new ArrayList<>());
-	}
+    public void addTeam(String team) {
+        teams.computeIfAbsent(team, key -> new ArrayList<>());
+    }
 
-	public void removeTeam(String team) {
-		teams.remove(team);
-		scoreTeams.remove(team);
-		teamColors.remove(team);
-	}
+    public void removeTeam(String team) {
+        teams.remove(team);
+        scoreTeams.remove(team);
+        teamColors.remove(team);
+        teamNameTagVisibilities.remove(team);
+    }
 
-	public boolean teamExists(String team) {
-		return teams.containsKey(team);
-	}
+    public boolean teamExists(String team) {
+        return teams.containsKey(team);
+    }
 
-	public void removePlayerFromTeam(String player, String team) {
-		List<String> teamPlayers = teams.get(team);
-		if (teamPlayers != null) teamPlayers.remove(player);
-	}
+    public void removePlayerFromTeam(String player, String team) {
+        List<String> teamPlayers = teams.get(team);
+        if (teamPlayers != null) teamPlayers.remove(player);
+    }
 
-	public boolean isPlayerInTeam(String player, String team) {
-		List<String> teamPlayers = teams.get(team);
-		return teamPlayers != null && teamPlayers.contains(player);
-	}
+    public boolean isPlayerInTeam(String player, String team) {
+        List<String> teamPlayers = teams.get(team);
+        return teamPlayers != null && teamPlayers.contains(player);
+    }
 
-	public boolean isPlayerInTeam(String player) {
-		for (List<String> teamPlayers : teams.values()) {
-			if (teamPlayers.contains(player)) return true;
-		}
-		return false;
-	}
+    public boolean isPlayerInTeam(String player) {
+        for (List<String> teamPlayers : teams.values()) {
+            if (teamPlayers.contains(player)) return true;
+        }
+        return false;
+    }
 
-	public Optional<Byte> getPlayerTeamColor(String player) {
-		Optional<String> team = getTeam(player);
-		return team.isPresent() ? getTeamColor(team.get()) : Optional.empty();
-	}
+    public Optional<Byte> getPlayerTeamColor(String player) {
+        Optional<String> team = getTeam(player);
+        return team.isPresent() ? getTeamColor(team.get()) : Optional.empty();
+    }
 
-	public Optional<String> getTeam(String player) {
-		for (Map.Entry<String, List<String>> entry : teams.entrySet())
-			if (entry.getValue().contains(player))
-				return Optional.of(entry.getKey());
-		return Optional.empty();
-	}
+    public Optional<String> getTeam(String player) {
+        for (Map.Entry<String, List<String>> entry : teams.entrySet())
+            if (entry.getValue().contains(player))
+                return Optional.of(entry.getKey());
+        return Optional.empty();
+    }
 
-	public void addObjective(String name) {
-		objectives.add(name);
-	}
+    public void setTeamNameTagVisibility(String team, String visibility) {
+        teamNameTagVisibilities.put(team, visibility);
+    }
 
-	public void removeObjective(String name) {
-		objectives.remove(name);
-		colorDependentSidebar.values().remove(name);
-		if (name.equals(colorIndependentSidebar)) {
-			colorIndependentSidebar = null;
-		}
-	}
+    public String getTeamNameTagVisibility(String team) {
+        return teamNameTagVisibilities.getOrDefault(team, "always");
+    }
 
-	public boolean objectiveExists(String name) {
-		return objectives.contains(name);
-	}
+    public boolean isNametagHidden(String username) {
+        for (Map.Entry<String, List<String>> entry : teams.entrySet()) {
+            if (entry.getValue().contains(username)) {
+                return "never".equalsIgnoreCase(teamNameTagVisibilities.getOrDefault(entry.getKey(), "always"));
+            }
+        }
+        return false;
+    }
 
-	public String sendTeamForScore(String score) {
-		if (score.length() <= 16) return score;
-		if (scoreTeams.containsKey(score)) return scoreTeams.get(score).name;
-		int l = 16;
-		int i = Math.min(16, score.length() - 16);
-		String name = score.substring(i, i + l);
-		while (scoreTeamNames.contains(name) || teams.containsKey(name)) {
-			i--;
-			while (score.length() - l - i > 16) {
-				l--;
-				if (l < 1) return score;
-				i = Math.min(16, score.length() - l);
-			}
-			name = score.substring(i, i + l);
-		}
-		String prefix = score.substring(0, i);
-		String suffix = i + l >= score.length() ? "" : score.substring(i + l);
+    public List<String> getTeamMembers(String team) {
+        return teams.getOrDefault(team, new ArrayList<>());
+    }
 
-		ScoreTeam scoreTeam = new ScoreTeam(name, prefix, suffix);
-		scoreTeams.put(score, scoreTeam);
-		scoreTeamNames.add(name);
+    public void addObjective(String name) {
+        objectives.add(name);
+    }
 
-		PacketWrapper teamPacket = PacketWrapper.create(ClientboundPackets1_7_2_5.SET_PLAYER_TEAM, getUser());
-		teamPacket.write(Types.STRING, name);
-		teamPacket.write(Types.BYTE, (byte) 0);
-		teamPacket.write(Types.STRING, "ViaRewind");
-		teamPacket.write(Types.STRING, prefix);
-		teamPacket.write(Types.STRING, suffix);
-		teamPacket.write(Types.BYTE, (byte) 0);
-		teamPacket.write(Types.SHORT, (short) 1);
-		teamPacket.write(Types.STRING, name);
-		teamPacket.send(Protocol1_8To1_7_6_10.class);
+    public void removeObjective(String name) {
+        objectives.remove(name);
+        colorDependentSidebar.values().remove(name);
+        if (name.equals(colorIndependentSidebar)) {
+            colorIndependentSidebar = null;
+        }
+    }
 
-		return name;
-	}
+    public boolean objectiveExists(String name) {
+        return objectives.contains(name);
+    }
 
-	public String removeTeamForScore(String score) {
-		ScoreTeam scoreTeam = scoreTeams.remove(score);
-		if (scoreTeam == null) return score;
-		scoreTeamNames.remove(scoreTeam.name);
+    public String sendTeamForScore(String score) {
+        if (score.length() <= 16) return score;
+        if (scoreTeams.containsKey(score)) return scoreTeams.get(score).name;
 
-		PacketWrapper teamPacket = PacketWrapper.create(ClientboundPackets1_7_2_5.SET_PLAYER_TEAM, getUser());
-		teamPacket.write(Types.STRING, scoreTeam.name);
-		teamPacket.write(Types.BYTE, (byte) 1);
-		teamPacket.send(Protocol1_8To1_7_6_10.class);
+        // Find the longest window score[i, i+l) that:
+        // - is not already claimed as a team name
+        // - keeps prefix (score[0,i)) at most 16 chars i <= 16
+        // - keeps suffix (score[i+l, end)) at most 16 chars score.length()-l-i <= 16
+        for (int l = 16; l >= 1; l--) {
+            final int iMax = Math.min(16, score.length() - l);
+            final int iMin = Math.max(0, score.length() - l - 16);
+            for (int i = iMax; i >= iMin; i--) {
+                final String name = score.substring(i, i + l);
+                if (scoreTeamNames.contains(name) || teams.containsKey(name)) {
+                    continue;
+                }
 
-		return scoreTeam.name;
-	}
+                final String prefix = score.substring(0, i);
+                final String suffix = i + l >= score.length() ? "" : score.substring(i + l);
 
-	public String getColorIndependentSidebar() {
-		return this.colorIndependentSidebar;
-	}
+                final ScoreTeam scoreTeam = new ScoreTeam(name, prefix, suffix);
+                scoreTeams.put(score, scoreTeam);
+                scoreTeamNames.add(name);
 
-	public HashMap<Byte, String> getColorDependentSidebar() {
-		return this.colorDependentSidebar;
-	}
+                final PacketWrapper teamPacket = PacketWrapper.create(ClientboundPackets1_7_2_5.SET_PLAYER_TEAM, getUser());
+                teamPacket.write(Types.STRING, name);
+                teamPacket.write(Types.BYTE, (byte) 0);
+                teamPacket.write(Types.STRING, "ViaRewind");
+                teamPacket.write(Types.STRING, prefix);
+                teamPacket.write(Types.STRING, suffix);
+                teamPacket.write(Types.BYTE, (byte) 0);
+                teamPacket.write(Types.SHORT, (short) 1);
+                teamPacket.write(Types.STRING, name);
+                teamPacket.send(Protocol1_8To1_7_6_10.class);
 
-	public void setColorIndependentSidebar(String colorIndependentSidebar) {
-		this.colorIndependentSidebar = colorIndependentSidebar;
-	}
+                return name;
+            }
+        }
 
-	private static class ScoreTeam {
-		private final String prefix;
-		private final String suffix;
-		private final String name;
+        return score;
+    }
 
-		public ScoreTeam(String name, String prefix, String suffix) {
-			this.prefix = prefix;
-			this.suffix = suffix;
-			this.name = name;
-		}
-	}
+    public String removeTeamForScore(String score) {
+        ScoreTeam scoreTeam = scoreTeams.remove(score);
+        if (scoreTeam == null) return score;
+        scoreTeamNames.remove(scoreTeam.name);
+
+        PacketWrapper teamPacket = PacketWrapper.create(ClientboundPackets1_7_2_5.SET_PLAYER_TEAM, getUser());
+        teamPacket.write(Types.STRING, scoreTeam.name);
+        teamPacket.write(Types.BYTE, (byte) 1);
+        teamPacket.send(Protocol1_8To1_7_6_10.class);
+
+        return scoreTeam.name;
+    }
+
+    public String getColorIndependentSidebar() {
+        return this.colorIndependentSidebar;
+    }
+
+    public void setColorIndependentSidebar(String colorIndependentSidebar) {
+        this.colorIndependentSidebar = colorIndependentSidebar;
+    }
+
+    public HashMap<Byte, String> getColorDependentSidebar() {
+        return this.colorDependentSidebar;
+    }
+
+    private static class ScoreTeam {
+        private final String prefix;
+        private final String suffix;
+        private final String name;
+
+        public ScoreTeam(String name, String prefix, String suffix) {
+            this.prefix = prefix;
+            this.suffix = suffix;
+            this.name = name;
+        }
+    }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_8to1_7_6_10/storage/WorldBorderEmulator.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -21,87 +21,87 @@ import com.viaversion.viaversion.api.connection.StoredObject;
 import com.viaversion.viaversion.api.connection.UserConnection;
 
 public class WorldBorderEmulator extends StoredObject {
-	private double x, z;
-	private double oldDiameter, newDiameter;
+    private double x, z;
+    private double oldDiameter, newDiameter;
 
-	private long lerpTime;
-	private long lerpStartTime;
+    private long lerpTime;
+    private long lerpStartTime;
 
-	private boolean init = false;
+    private boolean init = false;
 
-	public WorldBorderEmulator(UserConnection user) {
-		super(user);
-	}
+    public WorldBorderEmulator(UserConnection user) {
+        super(user);
+    }
 
-	public void init(double x, double z, double oldDiameter, double newDiameter, long lerpTime) {
-		this.x = x;
-		this.z = z;
+    public void init(double x, double z, double oldDiameter, double newDiameter, long lerpTime) {
+        this.x = x;
+        this.z = z;
 
-		this.oldDiameter = oldDiameter;
-		this.newDiameter = newDiameter;
+        this.oldDiameter = oldDiameter;
+        this.newDiameter = newDiameter;
 
-		this.lerpTime = lerpTime;
+        this.lerpTime = lerpTime;
 
-		init = true;
-	}
+        init = true;
+    }
 
-	public void setCenter(double x, double z) {
-		this.x = x;
-		this.z = z;
-	}
+    public void setCenter(double x, double z) {
+        this.x = x;
+        this.z = z;
+    }
 
-	public void lerpSize(double oldDiameter, double newDiameter, long lerpTime) {
-		this.oldDiameter = oldDiameter;
-		this.newDiameter = newDiameter;
-		this.lerpTime = lerpTime;
-		this.lerpStartTime = System.currentTimeMillis();
-	}
+    public void lerpSize(double oldDiameter, double newDiameter, long lerpTime) {
+        this.oldDiameter = oldDiameter;
+        this.newDiameter = newDiameter;
+        this.lerpTime = lerpTime;
+        this.lerpStartTime = System.currentTimeMillis();
+    }
 
-	public void setSize(double size) {
-		this.oldDiameter = size;
-		this.newDiameter = size;
+    public double getSize() {
+        if (lerpTime == 0) {
+            return newDiameter;
+        }
 
-		this.lerpTime = 0;
-	}
+        double percent = ((double) (System.currentTimeMillis() - lerpStartTime) / (double) (lerpTime));
 
-	public double getSize() {
-		if (lerpTime == 0) {
-			return newDiameter;
-		}
+        // Clamp value
+        if (percent > 1.0D) percent = 1.0d;
+        else if (percent < 0.0D) percent = 0.0d;
 
-		double percent = ((double) (System.currentTimeMillis() - lerpStartTime) / (double) (lerpTime));
+        return oldDiameter + (newDiameter - oldDiameter) * percent;
+    }
 
-		// Clamp value
-		if (percent > 1.0D) percent = 1.0d;
-		else if (percent < 0.0D) percent = 0.0d;
+    public void setSize(double size) {
+        this.oldDiameter = size;
+        this.newDiameter = size;
 
-		return oldDiameter + (newDiameter - oldDiameter) * percent;
-	}
+        this.lerpTime = 0;
+    }
 
-	public double getX() {
-		return x;
-	}
+    public double getX() {
+        return x;
+    }
 
-	public double getZ() {
-		return z;
-	}
+    public double getZ() {
+        return z;
+    }
 
-	public boolean isInit() {
-		return init;
-	}
+    public boolean isInit() {
+        return init;
+    }
 
-	public enum Side {
-		NORTH(0, -1),
-		EAST(1, 0),
-		SOUTH(0, 1),
-		WEST(-1, 0);
+    public enum Side {
+        NORTH(0, -1),
+        EAST(1, 0),
+        SOUTH(0, 1),
+        WEST(-1, 0);
 
-		public final int modX;
-		public final int modZ;
+        public final int modX;
+        public final int modZ;
 
-		Side(int modX, int modZ) {
-			this.modX = modX;
-			this.modZ = modZ;
-		}
-	}
+        Side(int modX, int modZ) {
+            this.modX = modX;
+            this.modZ = modZ;
+        }
+    }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_8to1_7_6_10/task/WorldBorderUpdateTask.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -26,70 +26,72 @@ import com.viaversion.viaversion.api.connection.UserConnection;
 import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
 import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ClientboundPackets1_8;
-
 import java.util.logging.Level;
 
 public class WorldBorderUpdateTask implements Runnable {
-	public static final int VIEW_DISTANCE = 16;
+    public static final int VIEW_DISTANCE = 16;
 
-	@Override
-	public void run() {
-		for (UserConnection connection : Via.getManager().getConnectionManager().getConnections()) {
-			final WorldBorderEmulator worldBorderEmulatorTracker = connection.get(WorldBorderEmulator.class);
-			if (!worldBorderEmulatorTracker.isInit()) continue;
+    @Override
+    public void run() {
+        for (UserConnection connection : Via.getManager().getConnectionManager().getConnections()) {
+            final WorldBorderEmulator worldBorderEmulatorTracker = connection.get(WorldBorderEmulator.class);
+            if (worldBorderEmulatorTracker == null) {
+                continue;
+            }
+            if (!worldBorderEmulatorTracker.isInit()) continue;
 
-			final PlayerSessionStorage playerSession = connection.get(PlayerSessionStorage.class);
+            final PlayerSessionStorage playerSession = connection.get(PlayerSessionStorage.class);
 
-			double radius = worldBorderEmulatorTracker.getSize() / 2.0;
+            double radius = worldBorderEmulatorTracker.getSize() / 2.0;
 
-			for (WorldBorderEmulator.Side side : WorldBorderEmulator.Side.values()) {
-				double d;
-				double pos;
-				double center;
-				if (side.modX != 0) {
-					pos = playerSession.getPosZ();
-					center = worldBorderEmulatorTracker.getZ();
-					d = Math.abs(worldBorderEmulatorTracker.getX() + radius * side.modX - playerSession.getPosX());
-				} else {
-					center = worldBorderEmulatorTracker.getX();
-					pos = playerSession.getPosX();
-					d = Math.abs(worldBorderEmulatorTracker.getZ() + radius * side.modZ - playerSession.getPosZ());
-				}
-				if (d >= VIEW_DISTANCE) continue;
+            for (WorldBorderEmulator.Side side : WorldBorderEmulator.Side.values()) {
+                double d;
+                double pos;
+                double center;
+                if (side.modX != 0) {
+                    pos = playerSession.getPosZ();
+                    center = worldBorderEmulatorTracker.getZ();
+                    d = Math.abs(worldBorderEmulatorTracker.getX() + radius * side.modX - playerSession.getPosX());
+                } else {
+                    center = worldBorderEmulatorTracker.getX();
+                    pos = playerSession.getPosX();
+                    d = Math.abs(worldBorderEmulatorTracker.getZ() + radius * side.modZ - playerSession.getPosZ());
+                }
+                if (d >= VIEW_DISTANCE) continue;
 
-				double r = Math.sqrt(VIEW_DISTANCE * VIEW_DISTANCE - d * d);
+                double r = Math.sqrt(VIEW_DISTANCE * VIEW_DISTANCE - d * d);
 
-				double minH = Math.ceil(pos - r);
-				double maxH = Math.floor(pos + r);
-				double minV = Math.ceil(playerSession.getPosY() - r);
-				double maxV = Math.floor(playerSession.getPosY() + r);
+                double minH = Math.ceil(pos - r);
+                double maxH = Math.floor(pos + r);
+                double minV = Math.ceil(playerSession.getPosY() - r);
+                double maxV = Math.floor(playerSession.getPosY() + r);
 
-				if (minH < center - radius) minH = Math.ceil(center - radius);
-				if (maxH > center + radius) maxH = Math.floor(center + radius);
-				if (minV < 0.0) minV = 0.0;
+                if (minH < center - radius) minH = Math.ceil(center - radius);
+                if (maxH > center + radius) maxH = Math.floor(center + radius);
+                if (minV < 0.0) minV = 0.0;
 
-				double centerH = (minH + maxH) / 2.0;
-				double centerV = (minV + maxV) / 2.0;
+                double centerH = (minH + maxH) / 2.0;
+                double centerV = (minV + maxV) / 2.0;
 
-				double particleOffset = 2.5;
+                double particleOffset = 2.5;
 
-				final PacketWrapper spawnParticle = PacketWrapper.create(ClientboundPackets1_8.LEVEL_PARTICLES, connection);
-				spawnParticle.write(Types.STRING, ViaRewind.getConfig().getWorldBorderParticle()); // particle name
-				spawnParticle.write(Types.FLOAT, (float) (side.modX != 0 ? worldBorderEmulatorTracker.getX() + (radius * side.modX) : centerH)); // x
-				spawnParticle.write(Types.FLOAT, (float) centerV); // y
-				spawnParticle.write(Types.FLOAT, (float) (side.modX == 0 ? worldBorderEmulatorTracker.getZ() + (radius * side.modZ) : centerH)); // z
-				spawnParticle.write(Types.FLOAT, (float) (side.modX != 0 ? 0f : (maxH - minH) / particleOffset)); // offset x
-				spawnParticle.write(Types.FLOAT, (float) ((maxV - minV) / particleOffset)); // offset y
-				spawnParticle.write(Types.FLOAT, (float) (side.modX == 0 ? 0f : (maxH - minH) / particleOffset)); // offset z
-				spawnParticle.write(Types.FLOAT, 0F); // particle data
-				spawnParticle.write(Types.INT, (int) Math.floor((maxH - minH) * (maxV - minV) * 0.5));
+                final PacketWrapper spawnParticle = PacketWrapper.create(ClientboundPackets1_8.LEVEL_PARTICLES, connection);
+                spawnParticle.write(Types.STRING, ViaRewind.getConfig().getWorldBorderParticle()); // particle name
+                spawnParticle.write(Types.FLOAT, (float) (side.modX != 0 ? worldBorderEmulatorTracker.getX() + (radius * side.modX) : centerH)); // x
+                spawnParticle.write(Types.FLOAT, (float) centerV); // y
+                spawnParticle.write(Types.FLOAT, (float) (side.modX == 0 ? worldBorderEmulatorTracker.getZ() + (radius * side.modZ) : centerH)); // z
+                spawnParticle.write(Types.FLOAT, (float) (side.modX != 0 ? 0f : (maxH - minH) / particleOffset)); // offset x
+                spawnParticle.write(Types.FLOAT, (float) ((maxV - minV) / particleOffset)); // offset y
+                spawnParticle.write(Types.FLOAT, (float) (side.modX == 0 ? 0f : (maxH - minH) / particleOffset)); // offset z
+                spawnParticle.write(Types.FLOAT, 0F); // particle data
+                spawnParticle.write(Types.INT, (int) Math.floor((maxH - minH) * (maxV - minV) * 0.5));
 
-				try {
-					spawnParticle.send(Protocol1_8To1_7_6_10.class);
-				} catch (Exception e) {
-					ViaRewind.getPlatform().getLogger().log(Level.SEVERE, "Failed to send world border particle", e);
-				}
-			}
-		}
-	}
+                try {
+                    spawnParticle.send(Protocol1_8To1_7_6_10.class);
+                } catch (Exception e) {
+                    ViaRewind.getPlatform().getLogger().log(Level.SEVERE, "Failed to send world border particle", e);
+                }
+            }
+        }
+    }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_9to1_8/Protocol1_9To1_8.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -18,94 +18,110 @@
 package com.viaversion.viarewind.protocol.v1_9to1_8;
 
 import com.viaversion.viabackwards.api.BackwardsProtocol;
-import com.viaversion.viarewind.protocol.v1_9to1_8.data.RewindMappingData1_8;
+import com.viaversion.viarewind.api.data.RewindMappingData;
+import com.viaversion.viarewind.protocol.v1_9to1_8.provider.InventoryProvider;
+import com.viaversion.viarewind.protocol.v1_9to1_8.rewriter.BlockItemPacketRewriter1_9;
 import com.viaversion.viarewind.protocol.v1_9to1_8.rewriter.EntityPacketRewriter1_9;
-import com.viaversion.viarewind.protocol.v1_9to1_8.rewriter.*;
-import com.viaversion.viarewind.protocol.v1_9to1_8.storage.*;
+import com.viaversion.viarewind.protocol.v1_9to1_8.rewriter.PlayerPacketRewriter1_9;
+import com.viaversion.viarewind.protocol.v1_9to1_8.rewriter.WorldPacketRewriter1_9;
+import com.viaversion.viarewind.protocol.v1_9to1_8.storage.BlockPlaceDestroyTracker;
+import com.viaversion.viarewind.protocol.v1_9to1_8.storage.BossBarStorage;
+import com.viaversion.viarewind.protocol.v1_9to1_8.storage.CommandBlockStateStorage;
+import com.viaversion.viarewind.protocol.v1_9to1_8.storage.CooldownStorage;
+import com.viaversion.viarewind.protocol.v1_9to1_8.storage.EntityTracker1_9;
+import com.viaversion.viarewind.protocol.v1_9to1_8.storage.LevitationStorage;
+import com.viaversion.viarewind.protocol.v1_9to1_8.storage.PlayerPositionTracker;
+import com.viaversion.viarewind.protocol.v1_9to1_8.storage.LastTitle;
+import com.viaversion.viarewind.protocol.v1_9to1_8.storage.WindowTracker;
 import com.viaversion.viarewind.protocol.v1_9to1_8.task.CooldownIndicatorTask;
 import com.viaversion.viarewind.protocol.v1_9to1_8.task.LevitationUpdateTask;
 import com.viaversion.viaversion.api.Via;
+import com.viaversion.viaversion.api.connection.ProtocolStorables;
 import com.viaversion.viaversion.api.connection.UserConnection;
+import com.viaversion.viaversion.api.minecraft.ClientWorld;
 import com.viaversion.viaversion.api.platform.providers.ViaProviders;
 import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
 import com.viaversion.viaversion.api.protocol.remapper.ValueTransformer;
 import com.viaversion.viaversion.api.type.Types;
-import com.viaversion.viaversion.api.minecraft.ClientWorld;
 import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ClientboundPackets1_8;
 import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ClientboundPackets1_9;
 import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ServerboundPackets1_8;
 import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ServerboundPackets1_9;
-
 import java.util.concurrent.TimeUnit;
 
 public class Protocol1_9To1_8 extends BackwardsProtocol<ClientboundPackets1_9, ClientboundPackets1_8, ServerboundPackets1_9, ServerboundPackets1_8> {
 
-	public static final ValueTransformer<Double, Integer> DOUBLE_TO_INT_TIMES_32 = new ValueTransformer<>(Types.INT) {
-		@Override
-		public Integer transform(PacketWrapper wrapper, Double inputValue) {
-			return (int) (inputValue * 32.0D);
-		}
-	};
-	public static final ValueTransformer<Float, Byte> DEGREES_TO_ANGLE = new ValueTransformer<>(Types.BYTE) {
-		@Override
-		public Byte transform(PacketWrapper packetWrapper, Float degrees) {
-			return (byte) ((degrees / 360F) * 256);
-		}
-	};
+    public static final ValueTransformer<Double, Integer> DOUBLE_TO_INT_TIMES_32 = new ValueTransformer<>(Types.INT) {
+        @Override
+        public Integer transform(PacketWrapper wrapper, Double inputValue) {
+            return (int) Math.round(inputValue * 32.0D);
+        }
+    };
+    public static final ValueTransformer<Float, Byte> DEGREES_TO_ANGLE = new ValueTransformer<>(Types.BYTE) {
+        @Override
+        public Byte transform(PacketWrapper packetWrapper, Float degrees) {
+            return (byte) ((degrees / 360F) * 256);
+        }
+    };
 
-	public static final RewindMappingData1_8 MAPPINGS = new RewindMappingData1_8();
+    public static final RewindMappingData MAPPINGS = new RewindMappingData("1.9", "1.8");
 
-	private final BlockItemPacketRewriter1_9 itemRewriter = new BlockItemPacketRewriter1_9(this);
-	private final EntityPacketRewriter1_9 entityRewriter = new EntityPacketRewriter1_9(this);
+    private final BlockItemPacketRewriter1_9 itemRewriter = new BlockItemPacketRewriter1_9(this);
+    private final EntityPacketRewriter1_9 entityRewriter = new EntityPacketRewriter1_9(this);
 
-	public Protocol1_9To1_8() {
-		super(ClientboundPackets1_9.class, ClientboundPackets1_8.class, ServerboundPackets1_9.class, ServerboundPackets1_8.class);
-	}
+    public Protocol1_9To1_8() {
+        super(ClientboundPackets1_9.class, ClientboundPackets1_8.class, ServerboundPackets1_9.class, ServerboundPackets1_8.class);
+    }
 
-	@Override
-	protected void registerPackets() {
-		entityRewriter.register();
-		itemRewriter.register();
-		new PlayerPacketRewriter1_9(this).register();
-		new WorldPacketRewriter1_9(this).register();
-	}
+    @Override
+    protected void registerPackets() {
+        entityRewriter.register();
+        itemRewriter.register();
+        new PlayerPacketRewriter1_9(this).register();
+        new WorldPacketRewriter1_9(this).register();
+    }
 
-	@Override
-	public void init(UserConnection connection) {
-		connection.addEntityTracker(this.getClass(), new EntityTracker1_9(connection));
-		connection.addClientWorld(this.getClass(), new ClientWorld());
+    @Override
+    public void init(UserConnection connection) {
+        final ProtocolStorables storables = connection.storables(this);
+        storables.setEntityTracker(new EntityTracker1_9(connection));
+        storables.setClientWorld(new ClientWorld());
 
-		connection.put(new WindowTracker(connection));
-		connection.put(new LevitationStorage());
-		connection.put(new PlayerPositionTracker());
-		connection.put(new CooldownStorage());
-		connection.put(new BlockPlaceDestroyTracker());
-		connection.put(new BossBarStorage(connection));
-	}
+        connection.put(new WindowTracker(connection));
+        connection.put(new LevitationStorage());
+        connection.put(new PlayerPositionTracker());
+        connection.put(new CooldownStorage());
+        connection.put(new LastTitle());
+        connection.put(new BlockPlaceDestroyTracker());
+        connection.put(new BossBarStorage(connection));
+        connection.put(new CommandBlockStateStorage());
+    }
 
-	@Override
-	public void register(ViaProviders providers) {
-		Via.getManager().getScheduler().scheduleRepeating(new LevitationUpdateTask(), 0L, 50L, TimeUnit.MILLISECONDS);
-		Via.getManager().getScheduler().scheduleRepeating(new CooldownIndicatorTask(), 0L, 50L, TimeUnit.MILLISECONDS);
-	}
+    @Override
+    public void register(ViaProviders providers) {
+        providers.register(InventoryProvider.class, new InventoryProvider());
 
-	@Override
-	public RewindMappingData1_8 getMappingData() {
-		return MAPPINGS;
-	}
+        Via.getManager().getScheduler().scheduleRepeating(new LevitationUpdateTask(), 0L, 50L, TimeUnit.MILLISECONDS);
+        Via.getManager().getScheduler().scheduleRepeating(new CooldownIndicatorTask(), 0L, 50L, TimeUnit.MILLISECONDS);
+    }
 
-	@Override
-	public BlockItemPacketRewriter1_9 getItemRewriter() {
-		return itemRewriter;
-	}
+    @Override
+    public RewindMappingData getMappingData() {
+        return MAPPINGS;
+    }
 
-	@Override
-	public EntityPacketRewriter1_9 getEntityRewriter() {
-		return entityRewriter;
-	}
+    @Override
+    public BlockItemPacketRewriter1_9 getItemRewriter() {
+        return itemRewriter;
+    }
 
-	@Override
-	public boolean hasMappingDataToLoad() {
-		return true;
-	}
+    @Override
+    public EntityPacketRewriter1_9 getEntityRewriter() {
+        return entityRewriter;
+    }
+
+    @Override
+    public boolean hasMappingDataToLoad() {
+        return true;
+    }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_9to1_8/cooldown/ActionBarVisualization.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -25,26 +25,26 @@ import com.viaversion.viaversion.libs.gson.JsonPrimitive;
 import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ClientboundPackets1_8;
 
 public class ActionBarVisualization implements CooldownVisualization {
-	private final UserConnection user;
+    private final UserConnection user;
 
-	public ActionBarVisualization(UserConnection user) {
-		this.user = user;
-	}
+    public ActionBarVisualization(UserConnection user) {
+        this.user = user;
+    }
 
-	@Override
-	public void show(double progress) throws Exception {
-		sendActionBar(CooldownVisualization.buildProgressText("■", progress));
-	}
+    @Override
+    public void show(double progress) throws Exception {
+        sendActionBar(CooldownVisualization.buildProgressText("■", progress));
+    }
 
-	@Override
-	public void hide() throws Exception {
-		sendActionBar("§r");
-	}
+    @Override
+    public void hide() throws Exception {
+        sendActionBar("§r");
+    }
 
-	private void sendActionBar(final String bar) {
-		PacketWrapper actionBarPacket = PacketWrapper.create(ClientboundPackets1_8.CHAT, user);
-		actionBarPacket.write(Types.COMPONENT, new JsonPrimitive(bar));
-		actionBarPacket.write(Types.BYTE, (byte) 2); // Position - above hotbar
-		actionBarPacket.scheduleSend(Protocol1_9To1_8.class);
-	}
+    private void sendActionBar(final String bar) {
+        PacketWrapper actionBarPacket = PacketWrapper.create(ClientboundPackets1_8.CHAT, user);
+        actionBarPacket.write(Types.COMPONENT, new JsonPrimitive(bar));
+        actionBarPacket.write(Types.BYTE, (byte) 2); // Position - above hotbar
+        actionBarPacket.scheduleSend(Protocol1_9To1_8.class);
+    }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_9to1_8/cooldown/BossBarVisualization.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -23,46 +23,45 @@ import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
 import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.libs.gson.JsonPrimitive;
 import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ClientboundPackets1_9;
-
 import java.util.UUID;
 
 public class BossBarVisualization implements CooldownVisualization {
-	private final UserConnection user;
-	private UUID bossUUID;
+    private final UserConnection user;
+    private UUID bossUUID;
 
-	public BossBarVisualization(UserConnection user) {
-		this.user = user;
-	}
+    public BossBarVisualization(UserConnection user) {
+        this.user = user;
+    }
 
-	@Override
-	public void show(double progress) throws Exception {
-		final PacketWrapper setBossbar = PacketWrapper.create(ClientboundPackets1_9.BOSS_EVENT, user);
-		if (bossUUID == null) {
-			bossUUID = UUID.randomUUID();
-			setBossbar.write(Types.UUID, bossUUID);
-			setBossbar.write(Types.VAR_INT, 0); // Action - add
-			setBossbar.write(Types.COMPONENT, new JsonPrimitive(" ")); // Title
-			setBossbar.write(Types.FLOAT, (float) progress); // Health
-			setBossbar.write(Types.VAR_INT, 0); // Color
-			setBossbar.write(Types.VAR_INT, 0); // Division
-			setBossbar.write(Types.UNSIGNED_BYTE, (short) 0); // Flags
-		} else {
-			setBossbar.write(Types.UUID, bossUUID);
-			setBossbar.write(Types.VAR_INT, 2); // Action - update health
-			setBossbar.write(Types.FLOAT, (float) progress); // Health
-		}
-		setBossbar.send(Protocol1_9To1_8.class, false);
-	}
+    @Override
+    public void show(double progress) throws Exception {
+        final PacketWrapper setBossbar = PacketWrapper.create(ClientboundPackets1_9.BOSS_EVENT, user);
+        if (bossUUID == null) {
+            bossUUID = UUID.randomUUID();
+            setBossbar.write(Types.UUID, bossUUID);
+            setBossbar.write(Types.VAR_INT, 0); // Action - add
+            setBossbar.write(Types.COMPONENT, new JsonPrimitive(" ")); // Title
+            setBossbar.write(Types.FLOAT, (float) progress); // Health
+            setBossbar.write(Types.VAR_INT, 0); // Color
+            setBossbar.write(Types.VAR_INT, 0); // Division
+            setBossbar.write(Types.UNSIGNED_BYTE, (short) 0); // Flags
+        } else {
+            setBossbar.write(Types.UUID, bossUUID);
+            setBossbar.write(Types.VAR_INT, 2); // Action - update health
+            setBossbar.write(Types.FLOAT, (float) progress); // Health
+        }
+        setBossbar.send(Protocol1_9To1_8.class, false);
+    }
 
-	@Override
-	public void hide() throws Exception {
-		if (bossUUID == null) {
-			return;
-		}
-		final PacketWrapper removeBossbar = PacketWrapper.create(ClientboundPackets1_9.BOSS_EVENT, user);
-		removeBossbar.write(Types.UUID, bossUUID);
-		removeBossbar.write(Types.VAR_INT, 1); // Action - remove
-		removeBossbar.send(Protocol1_9To1_8.class, false);
-		bossUUID = null;
-	}
+    @Override
+    public void hide() throws Exception {
+        if (bossUUID == null) {
+            return;
+        }
+        final PacketWrapper removeBossbar = PacketWrapper.create(ClientboundPackets1_9.BOSS_EVENT, user);
+        removeBossbar.write(Types.UUID, bossUUID);
+        removeBossbar.write(Types.VAR_INT, 1); // Action - remove
+        removeBossbar.send(Protocol1_9To1_8.class, false);
+        bossUUID = null;
+    }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_9to1_8/cooldown/CooldownVisualization.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -22,44 +22,43 @@ import com.viaversion.viarewind.api.ViaRewindConfig.CooldownIndicator;
 import com.viaversion.viaversion.api.connection.UserConnection;
 
 public interface CooldownVisualization {
-	void show(double progress) throws Exception;
+    int MAX_PROGRESS_TEXT_LENGTH = 10;
 
-	void hide() throws Exception;
+    static String buildProgressText(String symbol, double cooldown) {
+        int green = (int) Math.floor(((double) MAX_PROGRESS_TEXT_LENGTH) * cooldown);
+        int grey = MAX_PROGRESS_TEXT_LENGTH - green;
+        StringBuilder builder = new StringBuilder("§8");
+        while (green-- > 0) builder.append(symbol);
+        builder.append("§7");
+        while (grey-- > 0) builder.append(symbol);
+        return builder.toString();
+    }
 
+    void show(double progress) throws Exception;
 
-	int MAX_PROGRESS_TEXT_LENGTH = 10;
+    void hide() throws Exception;
 
-	static String buildProgressText(String symbol, double cooldown) {
-		int green = (int) Math.floor(((double) MAX_PROGRESS_TEXT_LENGTH) * cooldown);
-		int grey = MAX_PROGRESS_TEXT_LENGTH - green;
-		StringBuilder builder = new StringBuilder("§8");
-		while (green-- > 0) builder.append(symbol);
-		builder.append("§7");
-		while (grey-- > 0) builder.append(symbol);
-		return builder.toString();
-	}
+    interface Factory {
+        Factory DISABLED = user -> new DisabledCooldownVisualization();
 
-	interface Factory {
-		CooldownVisualization create(UserConnection user);
+        static Factory fromConfiguration() {
+            try {
+                return fromIndicator(ViaRewind.getConfig().getCooldownIndicator());
+            } catch (IllegalArgumentException e) {
+                ViaRewind.getPlatform().getLogger().warning("Invalid cooldown-indicator setting");
+                return DISABLED;
+            }
+        }
 
-		static Factory fromConfiguration() {
-			try {
-				return fromIndicator(ViaRewind.getConfig().getCooldownIndicator());
-			} catch (IllegalArgumentException e) {
-				ViaRewind.getPlatform().getLogger().warning("Invalid cooldown-indicator setting");
-				return DISABLED;
-			}
-		}
+        static Factory fromIndicator(CooldownIndicator indicator) {
+            return switch (indicator) {
+                case TITLE -> TitleCooldownVisualization::new;
+                case BOSS_BAR -> BossBarVisualization::new;
+                case ACTION_BAR -> ActionBarVisualization::new;
+                case DISABLED -> DISABLED;
+            };
+        }
 
-		static Factory fromIndicator(CooldownIndicator indicator) {
-			return switch (indicator) {
-				case TITLE -> TitleCooldownVisualization::new;
-				case BOSS_BAR -> BossBarVisualization::new;
-				case ACTION_BAR -> ActionBarVisualization::new;
-				case DISABLED -> DISABLED;
-			};
-		}
-
-		Factory DISABLED = user -> new DisabledCooldownVisualization();
-	}
+        CooldownVisualization create(UserConnection user);
+    }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_9to1_8/cooldown/DisabledCooldownVisualization.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -19,12 +19,12 @@ package com.viaversion.viarewind.protocol.v1_9to1_8.cooldown;
 
 public class DisabledCooldownVisualization implements CooldownVisualization {
 
-	@Override
-	public void show(double progress) {
-	}
+    @Override
+    public void show(double progress) {
+    }
 
-	@Override
-	public void hide() {
-	}
+    @Override
+    public void hide() {
+    }
 
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_9to1_8/cooldown/TitleCooldownVisualization.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -18,50 +18,95 @@
 package com.viaversion.viarewind.protocol.v1_9to1_8.cooldown;
 
 import com.viaversion.viarewind.protocol.v1_9to1_8.Protocol1_9To1_8;
+import com.viaversion.viarewind.protocol.v1_9to1_8.storage.LastTitle;
 import com.viaversion.viaversion.api.connection.UserConnection;
 import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
 import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.libs.gson.JsonPrimitive;
 import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ClientboundPackets1_8;
 
-import java.util.function.Consumer;
-
 public class TitleCooldownVisualization implements CooldownVisualization {
 
-	private static final int ACTION_SET_TITLE = 0;
-	private static final int ACTION_SET_SUBTITLE = 1;
-	private static final int ACTION_SET_TIMES_AND_DISPLAY = 2;
-	private static final int ACTION_HIDE = 3;
+    public static final int ACTION_SET_TITLE = 0;
+    public static final int ACTION_SET_SUBTITLE = 1;
+    public static final int ACTION_SET_TIMES_AND_DISPLAY = 2;
+    public static final int ACTION_HIDE = 3;
+    public static final int ACTION_RESET = 4;
 
-	private final UserConnection user;
+    private final UserConnection user;
+    private boolean visible;
 
-	public TitleCooldownVisualization(UserConnection user) {
-		this.user = user;
-	}
+    public TitleCooldownVisualization(UserConnection user) {
+        this.user = user;
+    }
 
-	@Override
-	public void show(double progress) throws Exception {
-		final String text = CooldownVisualization.buildProgressText("˙", progress);
+    @Override
+    public void show(double progress) throws Exception {
+        final LastTitle title = this.user.get(LastTitle.class);
+        if (this.visible && title.isVisible()) {
+            this.restoreTitle(title);
+            return;
+        }
 
-		sendTitlePacket(ACTION_SET_TITLE, wrapper -> wrapper.write(Types.COMPONENT, new JsonPrimitive("")));
-		sendTitlePacket(ACTION_SET_SUBTITLE, wrapper -> wrapper.write(Types.COMPONENT, new JsonPrimitive(text)));
-		sendTitlePacket(ACTION_SET_TIMES_AND_DISPLAY, wrapper -> {
-			wrapper.write(Types.INT, 0);
-			wrapper.write(Types.INT, 2);
-			wrapper.write(Types.INT, 5);
-		});
-	}
+        final PacketWrapper setTitle = PacketWrapper.create(ClientboundPackets1_8.SET_TITLES, user);
+        setTitle.write(Types.VAR_INT, ACTION_SET_TITLE);
+        setTitle.write(Types.COMPONENT, new JsonPrimitive(""));
+        setTitle.send(Protocol1_9To1_8.class);
 
-	@Override
-	public void hide() throws Exception {
-		sendTitlePacket(ACTION_HIDE, wrapper -> {});
-	}
+        final PacketWrapper setSubtitle = PacketWrapper.create(ClientboundPackets1_8.SET_TITLES, user);
+        setSubtitle.write(Types.VAR_INT, ACTION_SET_SUBTITLE);
+        setSubtitle.write(Types.COMPONENT, new JsonPrimitive(CooldownVisualization.buildProgressText("˙", progress)));
+        setSubtitle.send(Protocol1_9To1_8.class);
 
-	private void sendTitlePacket(int action, Consumer<PacketWrapper> writer) {
-		final PacketWrapper title = PacketWrapper.create(ClientboundPackets1_8.SET_TITLES, user);
-		title.write(Types.VAR_INT, action);
-		writer.accept(title);
-		title.scheduleSend(Protocol1_9To1_8.class);
-	}
+        final PacketWrapper setTitleTimes = PacketWrapper.create(ClientboundPackets1_8.SET_TITLES, user);
+        setTitleTimes.write(Types.VAR_INT, ACTION_SET_TIMES_AND_DISPLAY);
+        setTitleTimes.write(Types.INT, 0);
+        setTitleTimes.write(Types.INT, 2);
+        setTitleTimes.write(Types.INT, 5);
+        setTitleTimes.send(Protocol1_9To1_8.class);
+        this.visible = true;
+    }
+
+    @Override
+    public void hide() throws Exception {
+        if (!this.visible) {
+            return;
+        }
+
+        final LastTitle title = this.user.get(LastTitle.class);
+        if (title.isVisible()) {
+            this.restoreTitle(title);
+            return;
+        }
+
+        final PacketWrapper hideTitle = PacketWrapper.create(ClientboundPackets1_8.SET_TITLES, user);
+        hideTitle.write(Types.VAR_INT, ACTION_HIDE);
+        hideTitle.send(Protocol1_9To1_8.class);
+        this.visible = false;
+    }
+
+    private void restoreTitle(final LastTitle title) {
+        final PacketWrapper setTitleTimes = PacketWrapper.create(ClientboundPackets1_8.SET_TITLES, user);
+        setTitleTimes.write(Types.VAR_INT, ACTION_SET_TIMES_AND_DISPLAY);
+        final int[] times = title.remainingTimes();
+        setTitleTimes.write(Types.INT, times[0]);
+        setTitleTimes.write(Types.INT, times[1]);
+        setTitleTimes.write(Types.INT, times[2]);
+        setTitleTimes.send(Protocol1_9To1_8.class);
+
+        if (title.subtitle() != null) {
+            final PacketWrapper setSubtitle = PacketWrapper.create(ClientboundPackets1_8.SET_TITLES, user);
+            setSubtitle.write(Types.VAR_INT, ACTION_SET_SUBTITLE);
+            setSubtitle.write(Types.COMPONENT, title.subtitle());
+            setSubtitle.send(Protocol1_9To1_8.class);
+        }
+
+        final PacketWrapper setTitle = PacketWrapper.create(ClientboundPackets1_8.SET_TITLES, user);
+        setTitle.write(Types.VAR_INT, ACTION_SET_TITLE);
+        setTitle.write(Types.COMPONENT, title.title());
+        setTitle.send(Protocol1_9To1_8.class);
+
+        this.visible = false;
+    }
 
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_9to1_8/data/CommandBlockState.java

@@ -0,0 +1,165 @@
+/*
+ * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
+ * Copyright (C) 2018-2026 ViaVersion and contributors
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viarewind.protocol.v1_9to1_8.data;
+
+import com.viaversion.nbt.tag.CompoundTag;
+import com.viaversion.nbt.tag.NumberTag;
+import com.viaversion.nbt.tag.StringTag;
+
+public final class CommandBlockState {
+
+    public static final int COMMAND_BLOCK_COMMAND_LIMIT = 32500;
+
+    private static final String IMPULSE = "IMPULSE";
+    private static final String REPEAT = "REPEAT";
+    private static final String CHAIN = "CHAIN";
+    private static final String CONDITIONAL = "CONDITIONAL";
+    private static final String UNCONDITIONAL = "UNCONDITIONAL";
+    private static final String ALWAYS_ACTIVE = "ALWAYSACTIVE";
+    private static final String REDSTONE = "REDSTONE";
+
+    private CommandBlockState() {
+    }
+
+    public static boolean isCommandBlock(final int blockState) {
+        return isImpulse(blockState) || isRepeat(blockState) || isChain(blockState);
+    }
+
+    public static void decorateCommand(final CompoundTag tag, final int blockState) {
+        if (tag == null || !isCommandBlock(blockState)) {
+            return;
+        }
+
+        final StringTag commandTag = tag.getStringTag("Command");
+        if (commandTag == null) {
+            return;
+        }
+
+        final Mode mode = mode(blockState);
+        final boolean conditional = (blockState & 8) != 0;
+        final boolean automatic = booleanTag(tag, "auto");
+        if (mode == Mode.REDSTONE && !conditional && !automatic) {
+            return;
+        }
+
+        final String prefix = mode.prefix + ' ' + (conditional ? CONDITIONAL : UNCONDITIONAL) + ' ' + (automatic ? ALWAYS_ACTIVE : REDSTONE) + ' ';
+        final String command = commandTag.getValue();
+        if (!parseDecoratedCommand(command).prefixed() && prefix.length() + command.length() <= COMMAND_BLOCK_COMMAND_LIMIT) {
+            commandTag.setValue(prefix + command);
+        }
+    }
+
+    public static ParsedCommand parseDecoratedCommand(final String command) {
+        final int first = command.indexOf(' ');
+        if (first == -1) {
+            return ParsedCommand.defaultState(command);
+        }
+        final int second = command.indexOf(' ', first + 1);
+        if (second == -1) {
+            return ParsedCommand.defaultState(command);
+        }
+        final int third = command.indexOf(' ', second + 1);
+        if (third == -1) {
+            return ParsedCommand.defaultState(command);
+        }
+
+        final Mode mode = Mode.fromPrefix(command.substring(0, first));
+        if (mode == null) {
+            return ParsedCommand.defaultState(command);
+        }
+
+        final String conditionalToken = command.substring(first + 1, second);
+        final boolean conditional;
+        if (CONDITIONAL.equalsIgnoreCase(conditionalToken)) {
+            conditional = true;
+        } else if (UNCONDITIONAL.equalsIgnoreCase(conditionalToken)) {
+            conditional = false;
+        } else {
+            return ParsedCommand.defaultState(command);
+        }
+
+        final String automaticToken = command.substring(second + 1, third);
+        final boolean automatic;
+        if (ALWAYS_ACTIVE.equalsIgnoreCase(automaticToken)) {
+            automatic = true;
+        } else if (REDSTONE.equalsIgnoreCase(automaticToken)) {
+            automatic = false;
+        } else {
+            return ParsedCommand.defaultState(command);
+        }
+
+        return new ParsedCommand(command.substring(third + 1), mode.serverName, conditional, automatic, true);
+    }
+
+    private static boolean booleanTag(final CompoundTag tag, final String key) {
+        final NumberTag numberTag = tag.getNumberTag(key);
+        return numberTag != null && numberTag.asByte() != 0;
+    }
+
+    private static Mode mode(final int blockState) {
+        if (isRepeat(blockState)) {
+            return Mode.AUTO;
+        }
+        if (isChain(blockState)) {
+            return Mode.SEQUENCE;
+        }
+        return Mode.REDSTONE;
+    }
+
+    private static boolean isImpulse(final int blockState) {
+        return blockState >= 2192 && blockState <= 2207;
+    }
+
+    private static boolean isRepeat(final int blockState) {
+        return blockState >= 3360 && blockState <= 3375;
+    }
+
+    private static boolean isChain(final int blockState) {
+        return blockState >= 3376 && blockState <= 3391;
+    }
+
+    public record ParsedCommand(String command, String mode, boolean conditional, boolean automatic, boolean prefixed) {
+
+        private static ParsedCommand defaultState(final String command) {
+            return new ParsedCommand(command, Mode.REDSTONE.serverName, false, false, false);
+        }
+    }
+
+    private enum Mode {
+        REDSTONE(IMPULSE, "REDSTONE"),
+        AUTO(REPEAT, "AUTO"),
+        SEQUENCE(CHAIN, "SEQUENCE");
+
+        private final String prefix;
+        private final String serverName;
+
+        Mode(final String prefix, final String serverName) {
+            this.prefix = prefix;
+            this.serverName = serverName;
+        }
+
+        private static Mode fromPrefix(final String prefix) {
+            for (final Mode mode : values()) {
+                if (mode.prefix.equalsIgnoreCase(prefix)) {
+                    return mode;
+                }
+            }
+            return null;
+        }
+    }
+}

common/src/main/java/com/viaversion/viarewind/protocol/v1_9to1_8/data/EffectIdMappings1_8.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -21,49 +21,49 @@ import java.util.HashMap;
 
 public class EffectIdMappings1_8 {
 
-	private static final HashMap<Integer, Integer> effects = new HashMap<>();
+    private static final HashMap<Integer, Integer> effects = new HashMap<>();
 
-	static {
-		effects.put(1003, 1002);
-		effects.put(1005, 1003);
-		effects.put(1006, 1003);
-		effects.put(1007, 1003);
-		effects.put(1008, 1003);
-		effects.put(1009, 1004);
-		effects.put(1010, 1005);
-		effects.put(1011, 1006);
-		effects.put(1012, 1006);
-		effects.put(1013, 1006);
-		effects.put(1014, 1006);
-		effects.put(1015, 1007);
-		effects.put(1016, 1008);
-		effects.put(1017, 1008);
-		effects.put(1018, 1009);
-		effects.put(1019, 1010);
-		effects.put(1020, 1011);
-		effects.put(1021, 1012);
-		effects.put(1022, 1012);
-		effects.put(1023, 1013);
-		effects.put(1024, 1014);
-		effects.put(1025, 1015);
-		effects.put(1026, 1016);
-		effects.put(1027, 1017);
-		effects.put(1028, 1018);
-		effects.put(1029, 1020);
-		effects.put(1030, 1021);
-		effects.put(1031, 1022);
-		effects.put(1032, -1);
-		effects.put(1033, -1);
-		effects.put(1034, -1);
-		effects.put(1035, -1);
-		effects.put(1036, 1003);
-		effects.put(1037, 1006);
+    static {
+        effects.put(1003, 1002);
+        effects.put(1005, 1003);
+        effects.put(1006, 1003);
+        effects.put(1007, 1003);
+        effects.put(1008, 1003);
+        effects.put(1009, 1004);
+        effects.put(1010, 1005);
+        effects.put(1011, 1006);
+        effects.put(1012, 1006);
+        effects.put(1013, 1006);
+        effects.put(1014, 1006);
+        effects.put(1015, 1007);
+        effects.put(1016, 1008);
+        effects.put(1017, 1008);
+        effects.put(1018, 1009);
+        effects.put(1019, 1010);
+        effects.put(1020, 1011);
+        effects.put(1021, 1012);
+        effects.put(1022, 1012);
+        effects.put(1023, 1013);
+        effects.put(1024, 1014);
+        effects.put(1025, 1015);
+        effects.put(1026, 1016);
+        effects.put(1027, 1017);
+        effects.put(1028, 1018);
+        effects.put(1029, 1020);
+        effects.put(1030, 1021);
+        effects.put(1031, 1022);
+        effects.put(1032, -1);
+        effects.put(1033, -1);
+        effects.put(1034, -1);
+        effects.put(1035, -1);
+        effects.put(1036, 1003);
+        effects.put(1037, 1006);
 
-		effects.put(3000, -1);
-		effects.put(3001, -1);
-	}
+        effects.put(3000, -1);
+        effects.put(3001, -1);
+    }
 
-	public static int getOldId(int id) {
-		return effects.getOrDefault(id, id);
-	}
+    public static int getOldId(int id) {
+        return effects.getOrDefault(id, id);
+    }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_9to1_8/data/EntityDataIndex1_8.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -21,35 +21,34 @@ import com.viaversion.viaversion.api.minecraft.entities.EntityType;
 import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_9;
 import com.viaversion.viaversion.protocols.v1_8to1_9.data.EntityDataIndex1_9;
 import com.viaversion.viaversion.util.Pair;
-
 import java.util.HashMap;
 import java.util.Optional;
 
 public class EntityDataIndex1_8 {
 
-	private static final HashMap<Pair<EntityTypes1_9.EntityType, Integer>, EntityDataIndex1_9> ENTITY_DATA_REWRITES = new HashMap<>();
+    private static final HashMap<Pair<EntityTypes1_9.EntityType, Integer>, EntityDataIndex1_9> ENTITY_DATA_REWRITES = new HashMap<>();
 
-	static {
-		for (EntityDataIndex1_9 index : EntityDataIndex1_9.values()) {
-			ENTITY_DATA_REWRITES.put(new Pair<>(index.getClazz(), index.getNewIndex()), index);
-		}
-	}
+    static {
+        for (EntityDataIndex1_9 index : EntityDataIndex1_9.values()) {
+            ENTITY_DATA_REWRITES.put(new Pair<>(index.getClazz(), index.getNewIndex()), index);
+        }
+    }
 
-	private static Optional<EntityDataIndex1_9> getIndex(final EntityType type, final int index) {
-		final Pair<EntityType, Integer> pair = new Pair<>(type, index);
-		return Optional.ofNullable(ENTITY_DATA_REWRITES.get(pair));
-	}
+    private static Optional<EntityDataIndex1_9> getIndex(final EntityType type, final int index) {
+        final Pair<EntityType, Integer> pair = new Pair<>(type, index);
+        return Optional.ofNullable(ENTITY_DATA_REWRITES.get(pair));
+    }
 
-	public static EntityDataIndex1_9 searchIndex(final EntityType type, final int index) {
-		EntityType currentType = type;
-		do {
-			final Optional<EntityDataIndex1_9> optMeta = getIndex(currentType, index);
-			if (optMeta.isPresent()) {
-				return optMeta.get();
-			}
-			currentType = currentType.getParent();
-		} while (currentType != null);
-		return null;
-	}
+    public static EntityDataIndex1_9 searchIndex(final EntityType type, final int index) {
+        EntityType currentType = type;
+        do {
+            final Optional<EntityDataIndex1_9> optMeta = getIndex(currentType, index);
+            if (optMeta.isPresent()) {
+                return optMeta.get();
+            }
+            currentType = currentType.getParent();
+        } while (currentType != null);
+        return null;
+    }
 
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_9to1_8/data/PotionIdMappings1_8.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -18,63 +18,62 @@
 package com.viaversion.viarewind.protocol.v1_9to1_8.data;
 
 import com.viaversion.viaversion.protocols.v1_8to1_9.data.PotionIdMappings1_9;
-
 import java.util.HashMap;
 import java.util.Map;
 
 public class PotionIdMappings1_8 {
-	public static final Map<String, String> POTION_NAME_INDEX = new HashMap<>();
-	public static final Map<String, Integer> POTION_NAME_TO_ID = new HashMap<>();
+    public static final Map<String, String> POTION_NAME_INDEX = new HashMap<>();
+    public static final Map<String, Integer> POTION_NAME_TO_ID = new HashMap<>();
 
-	static {
-		POTION_NAME_TO_ID.putAll(PotionIdMappings1_9.POTION_NAME_TO_ID);
-		POTION_NAME_TO_ID.put("luck", 8203); // Map new potion to similar one (luck->leaping)
+    static {
+        POTION_NAME_TO_ID.putAll(PotionIdMappings1_9.POTION_NAME_TO_ID);
+        POTION_NAME_TO_ID.put("luck", 8203); // Map new potion to similar one (luck->leaping)
 
-		POTION_NAME_INDEX.put("water", "§rWater Bottle");
-		POTION_NAME_INDEX.put("mundane", "§rMundane Potion");
-		POTION_NAME_INDEX.put("thick", "§rThick Potion");
-		POTION_NAME_INDEX.put("awkward", "§rAwkward Potion");
-		POTION_NAME_INDEX.put("water_splash", "§rSplash Water Bottle");
-		POTION_NAME_INDEX.put("mundane_splash", "§rMundane Splash Potion");
-		POTION_NAME_INDEX.put("thick_splash", "§rThick Splash Potion");
-		POTION_NAME_INDEX.put("awkward_splash", "§rAwkward Splash Potion");
-		POTION_NAME_INDEX.put("water_lingering", "§rLingering Water Bottle");
-		POTION_NAME_INDEX.put("mundane_lingering", "§rMundane Lingering Potion");
-		POTION_NAME_INDEX.put("thick_lingering", "§rThick Lingering Potion");
-		POTION_NAME_INDEX.put("awkward_lingering", "§rAwkward Lingering Potion");
-		POTION_NAME_INDEX.put("night_vision_lingering", "§rLingering Potion of Night Vision");
-		POTION_NAME_INDEX.put("long_night_vision_lingering", "§rLingering Potion of Night Vision");
-		POTION_NAME_INDEX.put("invisibility_lingering", "§rLingering Potion of Invisibility");
-		POTION_NAME_INDEX.put("long_invisibility_lingering", "§rLingering Potion of Invisibility");
-		POTION_NAME_INDEX.put("leaping_lingering", "§rLingering Potion of Leaping");
-		POTION_NAME_INDEX.put("long_leaping_lingering", "§rLingering Potion of Leaping");
-		POTION_NAME_INDEX.put("strong_leaping_lingering", "§rLingering Potion of Leaping");
-		POTION_NAME_INDEX.put("fire_resistance_lingering", "§rLingering Potion of Fire Resistance");
-		POTION_NAME_INDEX.put("long_fire_resistance_lingering", "§rLingering Potion of Fire Resistance");
-		POTION_NAME_INDEX.put("swiftness_lingering", "§rLingering Potion of Swiftness");
-		POTION_NAME_INDEX.put("long_swiftness_lingering", "§rLingering Potion of Swiftness");
-		POTION_NAME_INDEX.put("strong_swiftness_lingering", "§rLingering Potion of Swiftness");
-		POTION_NAME_INDEX.put("slowness_lingering", "§rLingering Potion of Slowness");
-		POTION_NAME_INDEX.put("long_slowness_lingering", "§rLingering Potion of Slowness");
-		POTION_NAME_INDEX.put("water_breathing_lingering", "§rLingering Potion of Water Breathing");
-		POTION_NAME_INDEX.put("long_water_breathing_lingering", "§rLingering Potion of Water Breathing");
-		POTION_NAME_INDEX.put("healing_lingering", "§rLingering Potion of Healing");
-		POTION_NAME_INDEX.put("strong_healing_lingering", "§rLingering Potion of Healing");
-		POTION_NAME_INDEX.put("harming_lingering", "§rLingering Potion of Harming");
-		POTION_NAME_INDEX.put("strong_harming_lingering", "§rLingering Potion of Harming");
-		POTION_NAME_INDEX.put("poison_lingering", "§rLingering Potion of Poisen");
-		POTION_NAME_INDEX.put("long_poison_lingering", "§rLingering Potion of Poisen");
-		POTION_NAME_INDEX.put("strong_poison_lingering", "§rLingering Potion of Poisen");
-		POTION_NAME_INDEX.put("regeneration_lingering", "§rLingering Potion of Regeneration");
-		POTION_NAME_INDEX.put("long_regeneration_lingering", "§rLingering Potion of Regeneration");
-		POTION_NAME_INDEX.put("strong_regeneration_lingering", "§rLingering Potion of Regeneration");
-		POTION_NAME_INDEX.put("strength_lingering", "§rLingering Potion of Strength");
-		POTION_NAME_INDEX.put("long_strength_lingering", "§rLingering Potion of Strength");
-		POTION_NAME_INDEX.put("strong_strength_lingering", "§rLingering Potion of Strength");
-		POTION_NAME_INDEX.put("weakness_lingering", "§rLingering Potion of Weakness");
-		POTION_NAME_INDEX.put("long_weakness_lingering", "§rLingering Potion of Weakness");
-		POTION_NAME_INDEX.put("luck_lingering", "§rLingering Potion of Luck");
-		POTION_NAME_INDEX.put("luck", "§rPotion of Luck");
-		POTION_NAME_INDEX.put("luck_splash", "§rSplash Potion of Luck");
-	}
+        POTION_NAME_INDEX.put("water", "§rWater Bottle");
+        POTION_NAME_INDEX.put("mundane", "§rMundane Potion");
+        POTION_NAME_INDEX.put("thick", "§rThick Potion");
+        POTION_NAME_INDEX.put("awkward", "§rAwkward Potion");
+        POTION_NAME_INDEX.put("water_splash", "§rSplash Water Bottle");
+        POTION_NAME_INDEX.put("mundane_splash", "§rMundane Splash Potion");
+        POTION_NAME_INDEX.put("thick_splash", "§rThick Splash Potion");
+        POTION_NAME_INDEX.put("awkward_splash", "§rAwkward Splash Potion");
+        POTION_NAME_INDEX.put("water_lingering", "§rLingering Water Bottle");
+        POTION_NAME_INDEX.put("mundane_lingering", "§rMundane Lingering Potion");
+        POTION_NAME_INDEX.put("thick_lingering", "§rThick Lingering Potion");
+        POTION_NAME_INDEX.put("awkward_lingering", "§rAwkward Lingering Potion");
+        POTION_NAME_INDEX.put("night_vision_lingering", "§rLingering Potion of Night Vision");
+        POTION_NAME_INDEX.put("long_night_vision_lingering", "§rLingering Potion of Night Vision");
+        POTION_NAME_INDEX.put("invisibility_lingering", "§rLingering Potion of Invisibility");
+        POTION_NAME_INDEX.put("long_invisibility_lingering", "§rLingering Potion of Invisibility");
+        POTION_NAME_INDEX.put("leaping_lingering", "§rLingering Potion of Leaping");
+        POTION_NAME_INDEX.put("long_leaping_lingering", "§rLingering Potion of Leaping");
+        POTION_NAME_INDEX.put("strong_leaping_lingering", "§rLingering Potion of Leaping");
+        POTION_NAME_INDEX.put("fire_resistance_lingering", "§rLingering Potion of Fire Resistance");
+        POTION_NAME_INDEX.put("long_fire_resistance_lingering", "§rLingering Potion of Fire Resistance");
+        POTION_NAME_INDEX.put("swiftness_lingering", "§rLingering Potion of Swiftness");
+        POTION_NAME_INDEX.put("long_swiftness_lingering", "§rLingering Potion of Swiftness");
+        POTION_NAME_INDEX.put("strong_swiftness_lingering", "§rLingering Potion of Swiftness");
+        POTION_NAME_INDEX.put("slowness_lingering", "§rLingering Potion of Slowness");
+        POTION_NAME_INDEX.put("long_slowness_lingering", "§rLingering Potion of Slowness");
+        POTION_NAME_INDEX.put("water_breathing_lingering", "§rLingering Potion of Water Breathing");
+        POTION_NAME_INDEX.put("long_water_breathing_lingering", "§rLingering Potion of Water Breathing");
+        POTION_NAME_INDEX.put("healing_lingering", "§rLingering Potion of Healing");
+        POTION_NAME_INDEX.put("strong_healing_lingering", "§rLingering Potion of Healing");
+        POTION_NAME_INDEX.put("harming_lingering", "§rLingering Potion of Harming");
+        POTION_NAME_INDEX.put("strong_harming_lingering", "§rLingering Potion of Harming");
+        POTION_NAME_INDEX.put("poison_lingering", "§rLingering Potion of Poisen");
+        POTION_NAME_INDEX.put("long_poison_lingering", "§rLingering Potion of Poisen");
+        POTION_NAME_INDEX.put("strong_poison_lingering", "§rLingering Potion of Poisen");
+        POTION_NAME_INDEX.put("regeneration_lingering", "§rLingering Potion of Regeneration");
+        POTION_NAME_INDEX.put("long_regeneration_lingering", "§rLingering Potion of Regeneration");
+        POTION_NAME_INDEX.put("strong_regeneration_lingering", "§rLingering Potion of Regeneration");
+        POTION_NAME_INDEX.put("strength_lingering", "§rLingering Potion of Strength");
+        POTION_NAME_INDEX.put("long_strength_lingering", "§rLingering Potion of Strength");
+        POTION_NAME_INDEX.put("strong_strength_lingering", "§rLingering Potion of Strength");
+        POTION_NAME_INDEX.put("weakness_lingering", "§rLingering Potion of Weakness");
+        POTION_NAME_INDEX.put("long_weakness_lingering", "§rLingering Potion of Weakness");
+        POTION_NAME_INDEX.put("luck_lingering", "§rLingering Potion of Luck");
+        POTION_NAME_INDEX.put("luck", "§rPotion of Luck");
+        POTION_NAME_INDEX.put("luck_splash", "§rSplash Potion of Luck");
+    }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_9to1_8/data/RewindMappingData1_8.java

@@ -1,48 +0,0 @@
-/*
- * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
- *
- * 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 <http://www.gnu.org/licenses/>.
- */
-package com.viaversion.viarewind.protocol.v1_9to1_8.data;
-
-import com.viaversion.viarewind.api.data.RewindMappingDataLoader;
-import com.viaversion.viaversion.libs.fastutil.objects.ObjectArrayList;
-import com.viaversion.viaversion.libs.fastutil.objects.ObjectList;
-import com.viaversion.viaversion.libs.gson.JsonArray;
-import com.viaversion.viaversion.libs.gson.JsonElement;
-import com.viaversion.nbt.tag.CompoundTag;
-
-public final class RewindMappingData1_8 extends com.viaversion.viarewind.api.data.RewindMappingData {
-
-	private final ObjectList<String> sounds = new ObjectArrayList<>();
-
-	public RewindMappingData1_8() {
-		super("1.9.4", "1.8");
-	}
-
-	@Override
-	protected void loadExtras(CompoundTag data) {
-		super.loadExtras(data);
-
-		final JsonArray sounds = RewindMappingDataLoader.INSTANCE.loadData("sounds-1.9.json").getAsJsonArray("sounds");
-		for (final JsonElement sound : sounds) {
-			this.sounds.add(sound.getAsString());
-		}
-	}
-
-	public String soundName(final int soundId) {
-		return sounds.get(soundId);
-	}
-}

common/src/main/java/com/viaversion/viarewind/protocol/v1_9to1_8/data/WitherBossBar.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -28,224 +28,226 @@ import com.viaversion.viaversion.api.minecraft.entitydata.EntityData;
 import com.viaversion.viaversion.api.minecraft.entitydata.types.EntityDataTypes1_8;
 import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
 import com.viaversion.viaversion.api.type.Types;
-
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Set;
+import java.util.UUID;
 
 public class WitherBossBar implements BossBar {
 
-	private static int highestId = Integer.MAX_VALUE - 10000;
+    private static int highestId = Integer.MAX_VALUE - 10000;
 
-	private final UUID uuid;
-	private String title;
-	private float health;
-	private boolean visible = false;
+    private final UUID uuid;
+    private final UserConnection connection;
+    private final int entityId = highestId++;
+    private String title;
+    private float health;
+    private boolean visible = false;
+    private double locX, locY, locZ;
 
-	private final UserConnection connection;
+    public WitherBossBar(UserConnection connection, UUID uuid, String title, float health) {
+        this.connection = connection;
+        this.uuid = uuid;
+        this.title = title;
+        this.health = health;
+    }
 
-	private final int entityId = highestId++;
-	private double locX, locY, locZ;
+    @Override
+    public String getTitle() {
+        return title;
+    }
 
-	public WitherBossBar(UserConnection connection, UUID uuid, String title, float health) {
-		this.connection = connection;
-		this.uuid = uuid;
-		this.title = title;
-		this.health = health;
-	}
+    @Override
+    public BossBar setTitle(String title) {
+        this.title = title;
+        if (this.visible) {
+            updateEntityData();
+        }
+        return this;
+    }
 
-	@Override
-	public String getTitle() {
-		return title;
-	}
+    @Override
+    public float getHealth() {
+        return health;
+    }
 
-	@Override
-	public BossBar setTitle(String title) {
-		this.title = title;
-		if (this.visible) {
-			updateEntityData();
-		}
-		return this;
-	}
+    @Override
+    public BossBar setHealth(float health) {
+        this.health = health;
+        if (this.health <= 0) {
+            this.health = 0.0001f;
+        }
+        if (this.visible) {
+            updateEntityData();
+        }
+        return this;
+    }
 
-	@Override
-	public float getHealth() {
-		return health;
-	}
+    @Override
+    public BossColor getColor() {
+        return null;
+    }
 
-	@Override
-	public BossBar setHealth(float health) {
-		this.health = health;
-		if (this.health <= 0) {
-			this.health = 0.0001f;
-		}
-		if (this.visible) {
-			updateEntityData();
-		}
-		return this;
-	}
+    @Override
+    public BossBar setColor(BossColor bossColor) {
+        throw new UnsupportedOperationException(this.getClass().getName() + " does not support color");
+    }
 
-	@Override
-	public BossColor getColor() {
-		return null;
-	}
+    @Override
+    public BossStyle getStyle() {
+        return null;
+    }
 
-	@Override
-	public BossBar setColor(BossColor bossColor) {
-		throw new UnsupportedOperationException(this.getClass().getName() + " does not support color");
-	}
+    @Override
+    public BossBar setStyle(BossStyle bossStyle) {
+        throw new UnsupportedOperationException(this.getClass().getName() + " does not support styles");
+    }
 
-	@Override
-	public BossStyle getStyle() {
-		return null;
-	}
+    @Override
+    public BossBar addPlayer(UUID uuid) {
+        throw new UnsupportedOperationException(this.getClass().getName() + " is only for one UserConnection!");
+    }
 
-	@Override
-	public BossBar setStyle(BossStyle bossStyle) {
-		throw new UnsupportedOperationException(this.getClass().getName() + " does not support styles");
-	}
+    @Override
+    public BossBar addConnection(UserConnection userConnection) {
+        throw new UnsupportedOperationException(this.getClass().getName() + " is only for one UserConnection!");
+    }
 
-	@Override
-	public BossBar addPlayer(UUID uuid) {
-		throw new UnsupportedOperationException(this.getClass().getName() + " is only for one UserConnection!");
-	}
+    @Override
+    public BossBar removePlayer(UUID uuid) {
+        throw new UnsupportedOperationException(this.getClass().getName() + " is only for one UserConnection!");
+    }
 
-	@Override
-	public BossBar addConnection(UserConnection userConnection) {
-		throw new UnsupportedOperationException(this.getClass().getName() + " is only for one UserConnection!");
-	}
+    @Override
+    public BossBar removeConnection(UserConnection userConnection) {
+        throw new UnsupportedOperationException(this.getClass().getName() + " is only for one UserConnection!");
+    }
 
-	@Override
-	public BossBar removePlayer(UUID uuid) {
-		throw new UnsupportedOperationException(this.getClass().getName() + " is only for one UserConnection!");
-	}
+    @Override
+    public BossBar addFlag(BossFlag bossFlag) {
+        throw new UnsupportedOperationException(this.getClass().getName() + " does not support flags");
+    }
 
-	@Override
-	public BossBar removeConnection(UserConnection userConnection) {
-		throw new UnsupportedOperationException(this.getClass().getName() + " is only for one UserConnection!");
-	}
+    @Override
+    public BossBar removeFlag(BossFlag bossFlag) {
+        throw new UnsupportedOperationException(this.getClass().getName() + " does not support flags");
+    }
 
-	@Override
-	public BossBar addFlag(BossFlag bossFlag) {
-		throw new UnsupportedOperationException(this.getClass().getName() + " does not support flags");
-	}
+    @Override
+    public boolean hasFlag(BossFlag bossFlag) {
+        return false;
+    }
 
-	@Override
-	public BossBar removeFlag(BossFlag bossFlag) {
-		throw new UnsupportedOperationException(this.getClass().getName() + " does not support flags");
-	}
+    @Override
+    public Set<UUID> getPlayers() {
+        return Collections.singleton(connection.getProtocolInfo().getUuid());
+    }
 
-	@Override
-	public boolean hasFlag(BossFlag bossFlag) {
-		return false;
-	}
+    @Override
+    public Set<UserConnection> getConnections() {
+        throw new UnsupportedOperationException(this.getClass().getName() + " is only for one UserConnection!");
+    }
 
-	@Override
-	public Set<UUID> getPlayers() {
-		return Collections.singleton(connection.getProtocolInfo().getUuid());
-	}
+    @Override
+    public BossBar show() {
+        if (!this.visible) {
+            addWither();
+            this.visible = true;
+        }
+        return this;
+    }
 
-	@Override
-	public Set<UserConnection> getConnections() {
-		throw new UnsupportedOperationException(this.getClass().getName() + " is only for one UserConnection!");
-	}
+    @Override
+    public BossBar hide() {
+        if (this.visible) {
+            removeWither();
+            this.visible = false;
+        }
+        return this;
+    }
 
-	@Override
-	public BossBar show() {
-		if (!this.visible) {
-			addWither();
-			this.visible = true;
-		}
-		return this;
-	}
+    @Override
+    public boolean isVisible() {
+        return visible;
+    }
 
-	@Override
-	public BossBar hide() {
-		if (this.visible) {
-			removeWither();
-			this.visible = false;
-		}
-		return this;
-	}
+    @Override
+    public UUID getId() {
+        return this.uuid;
+    }
 
-	@Override
-	public boolean isVisible() {
-		return visible;
-	}
+    public void setLocation(double x, double y, double z) {
+        locX = x;
+        locY = y;
+        locZ = z;
+        updateLocation();
+    }
 
-	@Override
-	public UUID getId() {
-		return this.uuid;
-	}
+    private void addWither() {
+        final PacketWrapper addMob = PacketWrapper.create(ClientboundPackets1_7_2_5.ADD_MOB, this.connection);
+        addMob.write(Types.VAR_INT, entityId);
+        addMob.write(Types.UNSIGNED_BYTE, (short) 64);
+        addMob.write(Types.INT, (int) (locX * 32D));
+        addMob.write(Types.INT, (int) (locY * 32D));
+        addMob.write(Types.INT, (int) (locZ * 32D));
+        addMob.write(Types.BYTE, (byte) 0);
+        addMob.write(Types.BYTE, (byte) 0);
+        addMob.write(Types.BYTE, (byte) 0);
+        addMob.write(Types.SHORT, (short) 0);
+        addMob.write(Types.SHORT, (short) 0);
+        addMob.write(Types.SHORT, (short) 0);
 
-	public void setLocation(double x, double y, double z) {
-		locX = x;
-		locY = y;
-		locZ = z;
-		updateLocation();
-	}
+        final List<EntityData> entityData = new ArrayList<>();
+        entityData.add(new EntityData(0, EntityDataTypes1_8.BYTE, (byte) 0x20));
+        entityData.add(new EntityData(2, EntityDataTypes1_8.STRING, title));
+        entityData.add(new EntityData(3, EntityDataTypes1_8.BYTE, (byte) 1));
+        entityData.add(new EntityData(6, EntityDataTypes1_8.FLOAT, health * 300f));
+        entityData.add(new EntityData(20, EntityDataTypes1_8.INT, 880));
 
-	private void addWither() {
-		final PacketWrapper addMob = PacketWrapper.create(ClientboundPackets1_7_2_5.ADD_MOB, this.connection);
-		addMob.write(Types.VAR_INT, entityId);
-		addMob.write(Types.UNSIGNED_BYTE, (short) 64);
-		addMob.write(Types.INT, (int) (locX * 32D));
-		addMob.write(Types.INT, (int) (locY * 32D));
-		addMob.write(Types.INT, (int) (locZ * 32D));
-		addMob.write(Types.BYTE, (byte) 0);
-		addMob.write(Types.BYTE, (byte) 0);
-		addMob.write(Types.BYTE, (byte) 0);
-		addMob.write(Types.SHORT, (short) 0);
-		addMob.write(Types.SHORT, (short) 0);
-		addMob.write(Types.SHORT, (short) 0);
+        addMob.write(Types.ENTITY_DATA_LIST1_8, entityData);
+        addMob.scheduleSend(Protocol1_9To1_8.class);
+    }
 
-		final List<EntityData> entityData = new ArrayList<>();
-		entityData.add(new EntityData(0, EntityDataTypes1_8.BYTE, (byte) 0x20));
-		entityData.add(new EntityData(2, EntityDataTypes1_8.STRING, title));
-		entityData.add(new EntityData(3, EntityDataTypes1_8.BYTE, (byte) 1));
-		entityData.add(new EntityData(6, EntityDataTypes1_8.FLOAT, health * 300f));
+    private void updateLocation() {
+        final PacketWrapper teleportEntity = PacketWrapper.create(ClientboundPackets1_7_2_5.TELEPORT_ENTITY, this.connection);
+        teleportEntity.write(Types.VAR_INT, entityId);
+        teleportEntity.write(Types.INT, (int) (locX * 32D));
+        teleportEntity.write(Types.INT, (int) (locY * 32D));
+        teleportEntity.write(Types.INT, (int) (locZ * 32D));
+        teleportEntity.write(Types.BYTE, (byte) 0);
+        teleportEntity.write(Types.BYTE, (byte) 0);
+        teleportEntity.write(Types.BOOLEAN, false);
+        teleportEntity.scheduleSend(Protocol1_9To1_8.class);
+    }
 
-		addMob.write(Types.ENTITY_DATA_LIST1_8, entityData);
-		addMob.scheduleSend(Protocol1_9To1_8.class);
-	}
+    private void updateEntityData() {
+        final PacketWrapper setEntityData = PacketWrapper.create(ClientboundPackets1_7_2_5.SET_ENTITY_DATA, this.connection);
+        setEntityData.write(Types.VAR_INT, entityId);
 
-	private void updateLocation() {
-		final PacketWrapper teleportEntity = PacketWrapper.create(ClientboundPackets1_7_2_5.TELEPORT_ENTITY, this.connection);
-		teleportEntity.write(Types.VAR_INT, entityId);
-		teleportEntity.write(Types.INT, (int) (locX * 32D));
-		teleportEntity.write(Types.INT, (int) (locY * 32D));
-		teleportEntity.write(Types.INT, (int) (locZ * 32D));
-		teleportEntity.write(Types.BYTE, (byte) 0);
-		teleportEntity.write(Types.BYTE, (byte) 0);
-		teleportEntity.write(Types.BOOLEAN, false);
-		teleportEntity.scheduleSend(Protocol1_9To1_8.class);
-	}
+        final List<EntityData> entityData = new ArrayList<>();
+        entityData.add(new EntityData(2, EntityDataTypes1_8.STRING, title));
+        entityData.add(new EntityData(6, EntityDataTypes1_8.FLOAT, health * 300f));
 
-	private void updateEntityData() {
-		final PacketWrapper setEntityData = PacketWrapper.create(ClientboundPackets1_7_2_5.SET_ENTITY_DATA, this.connection);
-		setEntityData.write(Types.VAR_INT, entityId);
+        setEntityData.write(Types.ENTITY_DATA_LIST1_8, entityData);
+        setEntityData.scheduleSend(Protocol1_9To1_8.class);
+    }
 
-		final List<EntityData> entityData = new ArrayList<>();
-		entityData.add(new EntityData(2, EntityDataTypes1_8.STRING, title));
-		entityData.add(new EntityData(6, EntityDataTypes1_8.FLOAT, health * 300f));
+    private void removeWither() {
+        final PacketWrapper removeEntity = PacketWrapper.create(ClientboundPackets1_7_2_5.REMOVE_ENTITIES, this.connection);
+        removeEntity.write(Types.VAR_INT_ARRAY_PRIMITIVE, new int[]{entityId});
+        removeEntity.scheduleSend(Protocol1_9To1_8.class);
+    }
 
-		setEntityData.write(Types.ENTITY_DATA_LIST1_8, entityData);
-		setEntityData.scheduleSend(Protocol1_9To1_8.class);
-	}
+    public void setPlayerLocation(double posX, double posY, double posZ, float yaw, float pitch) {
+        double yawR = Math.toRadians(yaw);
+        double pitchR = Math.toRadians(pitch);
 
-	private void removeWither() {
-		final PacketWrapper removeEntity = PacketWrapper.create(ClientboundPackets1_7_2_5.REMOVE_ENTITIES, this.connection);
-		removeEntity.write(Types.VAR_INT_ARRAY_PRIMITIVE, new int[]{entityId});
-		removeEntity.scheduleSend(Protocol1_9To1_8.class);
-	}
+        posX -= Math.cos(pitchR) * Math.sin(yawR) * 48;
+        posY -= Math.sin(pitchR) * 48;
+        posZ += Math.cos(pitchR) * Math.cos(yawR) * 48;
 
-	public void setPlayerLocation(double posX, double posY, double posZ, float yaw, float pitch) {
-		double yawR = Math.toRadians(yaw);
-		double pitchR = Math.toRadians(pitch);
-
-		posX -= Math.cos(pitchR) * Math.sin(yawR) * 48;
-		posY -= Math.sin(pitchR) * 48;
-		posZ += Math.cos(pitchR) * Math.cos(yawR) * 48;
-
-		setLocation(posX, posY, posZ);
-	}
+        setLocation(posX, posY, posZ);
+    }
 
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_9to1_8/provider/InventoryProvider.java

@@ -0,0 +1,29 @@
+/*
+ * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
+ * Copyright (C) 2018-2026 ViaVersion and contributors
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viarewind.protocol.v1_9to1_8.provider;
+
+import com.viaversion.viaversion.api.connection.UserConnection;
+import com.viaversion.viaversion.api.platform.providers.Provider;
+
+public class InventoryProvider implements Provider {
+
+    public boolean hasElytra(final UserConnection connection) {
+        return false;
+    }
+
+}

common/src/main/java/com/viaversion/viarewind/protocol/v1_9to1_8/rewriter/BlockItemPacketRewriter1_9.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -17,324 +17,423 @@
  */
 package com.viaversion.viarewind.protocol.v1_9to1_8.rewriter;
 
+import com.viaversion.nbt.tag.ByteTag;
+import com.viaversion.nbt.tag.CompoundTag;
+import com.viaversion.nbt.tag.IntTag;
+import com.viaversion.nbt.tag.ListTag;
+import com.viaversion.nbt.tag.StringTag;
+import com.viaversion.nbt.tag.Tag;
 import com.viaversion.viabackwards.api.rewriters.LegacyEnchantmentRewriter;
 import com.viaversion.viarewind.api.rewriter.VRBlockItemRewriter;
 import com.viaversion.viarewind.protocol.v1_9to1_8.Protocol1_9To1_8;
 import com.viaversion.viarewind.protocol.v1_9to1_8.data.PotionIdMappings1_8;
+import com.viaversion.viarewind.protocol.v1_9to1_8.storage.CommandBlockStateStorage;
 import com.viaversion.viarewind.protocol.v1_9to1_8.storage.WindowTracker;
 import com.viaversion.viaversion.api.connection.UserConnection;
+import com.viaversion.viaversion.api.minecraft.BlockChangeRecord;
+import com.viaversion.viaversion.api.minecraft.BlockPosition;
 import com.viaversion.viaversion.api.minecraft.item.Item;
 import com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;
 import com.viaversion.viaversion.api.type.Types;
-import com.viaversion.nbt.tag.*;
 import com.viaversion.viaversion.protocols.v1_8to1_9.data.EntityIds1_8;
 import com.viaversion.viaversion.protocols.v1_8to1_9.data.PotionIdMappings1_9;
 import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ClientboundPackets1_9;
 import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ServerboundPackets1_8;
 import com.viaversion.viaversion.util.Key;
-
 import java.util.HashSet;
 import java.util.Set;
 
 public class BlockItemPacketRewriter1_9 extends VRBlockItemRewriter<ClientboundPackets1_9, ServerboundPackets1_8, Protocol1_9To1_8> {
 
-	public final Set<String> VALID_ATTRIBUTES = new HashSet<>();
+    public final Set<String> VALID_ATTRIBUTES = new HashSet<>();
 
-	private LegacyEnchantmentRewriter enchantmentRewriter;
+    private LegacyEnchantmentRewriter enchantmentRewriter;
 
-	public BlockItemPacketRewriter1_9(Protocol1_9To1_8 protocol) {
-		super(protocol, "1.9");
+    public BlockItemPacketRewriter1_9(Protocol1_9To1_8 protocol) {
+        super(protocol, "1.9");
 
-		VALID_ATTRIBUTES.add("generic.maxHealth");
-		VALID_ATTRIBUTES.add("generic.followRange");
-		VALID_ATTRIBUTES.add("generic.knockbackResistance");
-		VALID_ATTRIBUTES.add("generic.movementSpeed");
-		VALID_ATTRIBUTES.add("generic.attackDamage");
-		VALID_ATTRIBUTES.add("horse.jumpStrength");
-		VALID_ATTRIBUTES.add("zombie.spawnReinforcements");
-	}
+        VALID_ATTRIBUTES.add("generic.maxHealth");
+        VALID_ATTRIBUTES.add("generic.followRange");
+        VALID_ATTRIBUTES.add("generic.knockbackResistance");
+        VALID_ATTRIBUTES.add("generic.movementSpeed");
+        VALID_ATTRIBUTES.add("generic.attackDamage");
+        VALID_ATTRIBUTES.add("horse.jumpStrength");
+        VALID_ATTRIBUTES.add("zombie.spawnReinforcements");
+    }
 
-	@Override
-	protected void registerPackets() {
-		registerBlockChange(ClientboundPackets1_9.BLOCK_UPDATE);
-		registerMultiBlockChange(ClientboundPackets1_9.CHUNK_BLOCKS_UPDATE);
-		registerSetCreativeModeSlot(ServerboundPackets1_8.SET_CREATIVE_MODE_SLOT);
+    @Override
+    protected void registerPackets() {
+        protocol.registerClientbound(ClientboundPackets1_9.BLOCK_UPDATE, wrapper -> {
+            final BlockPosition position = wrapper.passthrough(Types.BLOCK_POSITION1_8);
+            final int blockState = wrapper.passthrough(Types.VAR_INT);
+            wrapper.user().get(CommandBlockStateStorage.class).storeOrRemove(position, blockState);
+            wrapper.set(Types.VAR_INT, 0, handleBlockId(blockState));
+        });
 
-		protocol.registerClientbound(ClientboundPackets1_9.CONTAINER_CLOSE, wrapper -> {
-			final short windowId = wrapper.passthrough(Types.UNSIGNED_BYTE);
+        protocol.registerClientbound(ClientboundPackets1_9.CHUNK_BLOCKS_UPDATE, wrapper -> {
+            final int chunkX = wrapper.passthrough(Types.INT);
+            final int chunkZ = wrapper.passthrough(Types.INT);
+            final BlockChangeRecord[] records = wrapper.passthrough(Types.BLOCK_CHANGE_ARRAY);
+            final CommandBlockStateStorage storage = wrapper.user().get(CommandBlockStateStorage.class);
 
-			final WindowTracker tracker = wrapper.user().get(WindowTracker.class);
+            for (BlockChangeRecord record : records) {
+                final int blockState = record.getBlockId();
+                final BlockPosition position = new BlockPosition((chunkX << 4) + record.getSectionX(), record.getY(), (chunkZ << 4) + record.getSectionZ());
+                storage.storeOrRemove(position, blockState);
+                record.setBlockId(handleBlockId(blockState));
+            }
+        });
+        registerSetCreativeModeSlot(ServerboundPackets1_8.SET_CREATIVE_MODE_SLOT);
 
-			final String windowType = tracker.get(windowId);
-			if (windowType != null && windowType.equalsIgnoreCase("minecraft:enchanting_table")) {
-				tracker.clearEnchantmentProperties();
-			}
-			tracker.remove(windowId);
-		});
+        protocol.registerClientbound(ClientboundPackets1_9.CONTAINER_CLOSE, wrapper -> {
+            final short windowId = wrapper.passthrough(Types.UNSIGNED_BYTE);
 
-		protocol.registerClientbound(ClientboundPackets1_9.OPEN_SCREEN, wrapper -> {
-			final short windowId = wrapper.passthrough(Types.UNSIGNED_BYTE);
-			final String windowType = wrapper.passthrough(Types.STRING);
+            final WindowTracker tracker = wrapper.user().get(WindowTracker.class);
 
-			wrapper.user().get(WindowTracker.class).put(windowId, windowType);
-		});
+            final String windowType = tracker.get(windowId);
+            if (windowType != null && windowType.equalsIgnoreCase("minecraft:enchanting_table")) {
+                tracker.clearEnchantmentProperties();
+            }
+            tracker.remove(windowId);
+        });
 
-		protocol.registerClientbound(ClientboundPackets1_9.CONTAINER_SET_CONTENT, wrapper -> {
-			final short windowId = wrapper.passthrough(Types.UNSIGNED_BYTE);
+        protocol.registerClientbound(ClientboundPackets1_9.OPEN_SCREEN, wrapper -> {
+            final short windowId = wrapper.passthrough(Types.UNSIGNED_BYTE);
+            final String windowType = wrapper.passthrough(Types.STRING);
+            wrapper.passthrough(Types.COMPONENT); // title
+            final short slotCount = wrapper.passthrough(Types.UNSIGNED_BYTE);
 
-			Item[] items = wrapper.read(Types.ITEM1_8_SHORT_ARRAY);
-			for (int i = 0; i < items.length; i++) {
-				items[i] = handleItemToClient(wrapper.user(), items[i]);
-			}
+            final WindowTracker tracker = wrapper.user().get(WindowTracker.class);
+            tracker.put(windowId, windowType);
+            tracker.openWindow(windowId, windowType, slotCount);
+        });
 
-			if (windowId == 0 && items.length == 46) {
-				Item[] old = items;
-				items = new Item[45];
-				System.arraycopy(old, 0, items, 0, 45);
-			} else {
-				final String type = wrapper.user().get(WindowTracker.class).get(windowId);
-				if (type != null && type.equalsIgnoreCase("minecraft:brewing_stand")) {
-					System.arraycopy(items, 0, wrapper.user().get(WindowTracker.class).getBrewingItems(windowId), 0, 4);
-					WindowTracker.updateBrewingStand(wrapper.user(), items[4], windowId);
-					Item[] old = items;
-					items = new Item[old.length - 1];
-					System.arraycopy(old, 0, items, 0, 4);
-					System.arraycopy(old, 5, items, 4, old.length - 5);
-				}
-			}
+        protocol.registerClientbound(ClientboundPackets1_9.CONTAINER_SET_CONTENT, wrapper -> {
+            final short windowId = wrapper.passthrough(Types.UNSIGNED_BYTE);
 
-			wrapper.write(Types.ITEM1_8_SHORT_ARRAY, items);
-		});
+            Item[] items = wrapper.read(Types.ITEM1_8_SHORT_ARRAY);
+            for (int i = 0; i < items.length; i++) {
+                items[i] = handleItemToClient(wrapper.user(), items[i]);
+            }
 
-		protocol.registerClientbound(ClientboundPackets1_9.CONTAINER_SET_SLOT, wrapper -> {
-			final byte windowId = wrapper.passthrough(Types.BYTE);
-			final short slot = wrapper.passthrough(Types.SHORT);
-			final Item item = wrapper.passthrough(Types.ITEM1_8);
+            if (windowId == 0 && items.length == 46) {
+                Item[] old = items;
+                items = new Item[45];
+                System.arraycopy(old, 0, items, 0, 45);
+            } else {
+                final String type = wrapper.user().get(WindowTracker.class).get(windowId);
+                if (type != null && type.equalsIgnoreCase("minecraft:brewing_stand")) {
+                    System.arraycopy(items, 0, wrapper.user().get(WindowTracker.class).getBrewingItems(windowId), 0, 4);
+                    WindowTracker.updateBrewingStand(wrapper.user(), items[4], windowId);
+                    Item[] old = items;
+                    items = new Item[old.length - 1];
+                    System.arraycopy(old, 0, items, 0, 4);
+                    System.arraycopy(old, 5, items, 4, old.length - 5);
+                }
+            }
 
-			handleItemToClient(wrapper.user(), item);
-			if (windowId == 0 && slot == 45) {
-				wrapper.cancel();
-				return;
-			}
-			final WindowTracker windowTracker = wrapper.user().get(WindowTracker.class);
-			final String windowType = windowTracker.get(windowId);
-			if (windowType != null && windowType.equalsIgnoreCase("minecraft:brewing_stand")) {
-				if (slot > 4) {
-					wrapper.set(Types.SHORT, 0, (short) (slot - 1));
-				} else if (slot == 4) {
-					wrapper.cancel();
-					WindowTracker.updateBrewingStand(wrapper.user(), wrapper.get(Types.ITEM1_8, 0), windowId);
-				} else {
-					windowTracker.getBrewingItems(windowId)[slot] = wrapper.get(Types.ITEM1_8, 0);
-				}
-			}
-		});
+            wrapper.write(Types.ITEM1_8_SHORT_ARRAY, items);
+        });
 
-		protocol.registerServerbound(ServerboundPackets1_8.CONTAINER_CLOSE, wrapper -> {
-			final byte windowId = wrapper.passthrough(Types.BYTE);
-			wrapper.user().get(WindowTracker.class).remove(windowId);
-		});
+        protocol.registerClientbound(ClientboundPackets1_9.CONTAINER_SET_SLOT, wrapper -> {
+            final byte windowId = wrapper.passthrough(Types.BYTE);
+            final short slot = wrapper.passthrough(Types.SHORT);
+            final Item item = wrapper.passthrough(Types.ITEM1_8);
 
-		protocol.registerServerbound(ServerboundPackets1_8.CONTAINER_CLICK, new PacketHandlers() {
-			@Override
-			public void register() {
-				map(Types.BYTE); // Window id
-				map(Types.SHORT); // Slot
-				map(Types.BYTE); // Button
-				map(Types.SHORT); // Action number
-				map(Types.BYTE, Types.VAR_INT); // Mode
-				map(Types.ITEM1_8); // Clicked item
-				handler(wrapper -> handleItemToServer(wrapper.user(), wrapper.get(Types.ITEM1_8, 0)));
-				handler(wrapper -> {
-					final byte windowId = wrapper.get(Types.BYTE, 0);
-					final String windowType = wrapper.user().get(WindowTracker.class).get(windowId);
+            handleItemToClient(wrapper.user(), item);
+            if (windowId == -2) {
+                // 1.8 has no window -2 (set a player-inv slot by raw index, ignoring the open container) — retarget it.
+                final WindowTracker tracker = wrapper.user().get(WindowTracker.class);
+                final short openWindow = tracker.openWindowId();
+                if (openWindow != 0) {
+                    // Foreign container open: 1.8 only applies player-inv changes through it (main=size.., hotbar=size+27..).
+                    final int size = tracker.openWindowSize();
+                    final int containerSlot;
+                    if (slot >= 0 && slot <= 8) {
+                        containerSlot = size + 27 + slot;
+                    } else if (slot >= 9 && slot <= 35) {
+                        containerSlot = size + slot - 9;
+                    } else { // armor/offhand: no slot in a foreign container
+                        wrapper.cancel();
+                        return;
+                    }
+                    wrapper.set(Types.BYTE, 0, (byte) openWindow);
+                    wrapper.set(Types.SHORT, 0, (short) containerSlot);
+                    return;
+                }
 
-					if (windowType != null && windowType.equalsIgnoreCase("minecraft:brewing_stand")) {
-						final short slot = wrapper.get(Types.SHORT, 0);
-						if (slot > 3) {
-							wrapper.set(Types.SHORT, 0, (short) (slot + 1));
-						}
-					}
-				});
-			}
-		});
+                // Otherwise window 0 with the menu slot.
+                final int windowSlot;
+                if (slot >= 0 && slot <= 8) {
+                    windowSlot = slot + 36;
+                } else if (slot >= 9 && slot <= 35) {
+                    windowSlot = slot;
+                } else if (slot >= 36 && slot <= 39) {
+                    windowSlot = 44 - slot;
+                } else { // offhand/body/saddle: no 1.8 equivalent
+                    wrapper.cancel();
+                    return;
+                }
+                wrapper.set(Types.BYTE, 0, (byte) 0);
+                wrapper.set(Types.SHORT, 0, (short) windowSlot);
+                return;
+            }
 
-		protocol.registerClientbound(ClientboundPackets1_9.CONTAINER_SET_DATA, wrapper -> {
-			final short windowId = wrapper.passthrough(Types.UNSIGNED_BYTE);
-			short key = wrapper.read(Types.SHORT);
-			short value = wrapper.read(Types.SHORT);
+            if (windowId == 0 && slot == 45) {
+                wrapper.cancel();
+                return;
+            }
 
-			final WindowTracker tracker = wrapper.user().get(WindowTracker.class);
-			final String windowType = tracker.get(windowId);
-			if (windowType != null && windowType.equalsIgnoreCase("minecraft:enchanting_table")) {
-				if (key >= 4 && key <= 6) { // Store enchantment ids
-					tracker.putEnchantmentProperty(key, value);
-					wrapper.cancel();
-				} else if (key >= 7 && key <= 9) { // Mix levels with tracked ids
-					key -= 3;
-					final short property = tracker.getEnchantmentValue(key);
-					value = (short) (property | (value << 8));
-				}
-			}
-			wrapper.write(Types.SHORT, key);
-			wrapper.write(Types.SHORT, value);
-		});
-	}
+            final WindowTracker windowTracker = wrapper.user().get(WindowTracker.class);
+            final String windowType = windowTracker.get(windowId);
+            if (windowType != null && windowType.equalsIgnoreCase("minecraft:brewing_stand")) {
+                if (slot > 4) {
+                    wrapper.set(Types.SHORT, 0, (short) (slot - 1));
+                } else if (slot == 4) {
+                    wrapper.cancel();
+                    WindowTracker.updateBrewingStand(wrapper.user(), wrapper.get(Types.ITEM1_8, 0), windowId);
+                } else {
+                    windowTracker.getBrewingItems(windowId)[slot] = wrapper.get(Types.ITEM1_8, 0);
+                }
+            }
+        });
 
-	@Override
-	protected void registerRewrites() {
-		enchantmentRewriter = new LegacyEnchantmentRewriter(nbtTagName());
-		enchantmentRewriter.registerEnchantment(9, "§7Frost Walker");
-		enchantmentRewriter.registerEnchantment(70, "§7Mending");
-	}
+        protocol.registerServerbound(ServerboundPackets1_8.CONTAINER_CLOSE, wrapper -> {
+            final byte windowId = wrapper.passthrough(Types.BYTE);
+            wrapper.user().get(WindowTracker.class).remove(windowId);
+        });
 
-	@Override
-	public Item handleItemToClient(UserConnection connection, Item item) {
-		if (item == null) return null;
-		super.handleItemToClient(connection, item);
+        protocol.registerServerbound(ServerboundPackets1_8.CONTAINER_CLICK, new PacketHandlers() {
+            @Override
+            public void register() {
+                map(Types.BYTE); // Window id
+                map(Types.SHORT); // Slot
+                map(Types.BYTE); // Button
+                map(Types.SHORT); // Action number
+                map(Types.BYTE, Types.VAR_INT); // Mode
+                map(Types.ITEM1_8); // Clicked item
+                handler(wrapper -> handleItemToServer(wrapper.user(), wrapper.get(Types.ITEM1_8, 0)));
+                handler(wrapper -> {
+                    final byte windowId = wrapper.get(Types.BYTE, 0);
+                    final String windowType = wrapper.user().get(WindowTracker.class).get(windowId);
 
-		CompoundTag tag = item.tag();
-		enchantmentRewriter.handleToClient(item);
+                    if (windowType != null && windowType.equalsIgnoreCase("minecraft:brewing_stand")) {
+                        final short slot = wrapper.get(Types.SHORT, 0);
+                        if (slot > 3) {
+                            wrapper.set(Types.SHORT, 0, (short) (slot + 1));
+                        }
+                    }
+                });
+            }
+        });
 
-		CompoundTag displayTag = tag == null ? null : tag.getCompoundTag("display");
-		if (item.data() != 0) {
-			final ByteTag unbreakableTag = tag == null ? null : tag.getByteTag("Unbreakable");
-			if (unbreakableTag != null && unbreakableTag.asByte() != 0) {
-				tag.put(nbtTagName() + "|Unbreakable", new ByteTag(unbreakableTag.asByte()));
-				tag.remove("Unbreakable");
+        protocol.registerClientbound(ClientboundPackets1_9.CONTAINER_SET_DATA, wrapper -> {
+            final short windowId = wrapper.passthrough(Types.UNSIGNED_BYTE);
+            short key = wrapper.read(Types.SHORT);
+            short value = wrapper.read(Types.SHORT);
 
-				if (displayTag == null) { // Remove the display tag again if it was only added to emulate unbreakable
-					tag.put("display", displayTag = new CompoundTag());
-					tag.put(nbtTagName() + "|noDisplay", new ByteTag(true));
-				}
+            final WindowTracker tracker = wrapper.user().get(WindowTracker.class);
+            final String windowType = tracker.get(windowId);
+            if (windowType != null && windowType.equalsIgnoreCase("minecraft:enchanting_table")) {
+                if (key >= 4 && key <= 6) { // Store enchantment ids
+                    tracker.putEnchantmentProperty(key, value);
+                    wrapper.cancel();
+                } else if (key >= 7 && key <= 9) { // Mix levels with tracked ids
+                    key -= 3;
+                    final short property = tracker.getEnchantmentValue(key);
+                    value = (short) (property | (value << 8));
+                }
+            }
+            wrapper.write(Types.SHORT, key);
+            wrapper.write(Types.SHORT, value);
+        });
+    }
 
-				ListTag<StringTag> loreTag = displayTag.getListTag("Lore", StringTag.class);
-				if (loreTag == null) {
-					displayTag.put("Lore", loreTag = new ListTag<>(StringTag.class));
-				}
-				loreTag.add(new StringTag("§9Unbreakable"));
-			}
-		}
+    @Override
+    protected void registerRewrites() {
+        enchantmentRewriter = new LegacyEnchantmentRewriter(nbtTagName());
+        enchantmentRewriter.registerEnchantment(9, "§7Frost Walker");
+        enchantmentRewriter.registerEnchantment(70, "§7Mending");
+    }
 
-		if (item.identifier() == 383 && item.data() == 0) { // Spawn eggs
-			int data = 0;
-			final CompoundTag entityTag = tag == null ? null : tag.getCompoundTag("EntityTag");
-			if (entityTag != null) {
-				final StringTag idTag = entityTag.getStringTag("id");
-				if (idTag != null) {
-					final String id = idTag.getValue();
-					if (EntityIds1_8.ENTITY_NAME_TO_ID.containsKey(id)) {
-						data = EntityIds1_8.ENTITY_NAME_TO_ID.get(id);
-					} else if (displayTag == null) {
-						tag.put("display", displayTag = new CompoundTag());
-						tag.put(nbtTagName() + "|noDisplay", new ByteTag(true));
-						displayTag.put("Name", new StringTag("§rSpawn " + id));
-					}
-				}
-			}
-			item.setData((short) data);
-		}
+    @Override
+    public Item handleItemToClient(UserConnection connection, Item item) {
+        if (item == null) return null;
+        final int originalId = item.identifier();
+        super.handleItemToClient(connection, item);
 
-		// Potion, splash potion, lingering potion
-		final boolean potion = item.identifier() == 373;
-		final boolean splashPotion = item.identifier() == 438;
-		final boolean lingeringPotion = item.identifier() == 441;
+        CompoundTag tag = item.tag();
+        enchantmentRewriter.handleToClient(item);
 
-		if (potion || splashPotion || lingeringPotion) {
-			int data = 0;
-			final StringTag potionTag = tag == null ? null : tag.getStringTag("Potion");
-			if (potionTag != null) {
-				String potionName = Key.stripMinecraftNamespace(potionTag.getValue());
-				if (PotionIdMappings1_8.POTION_NAME_TO_ID.containsKey(potionName)) {
-					data = PotionIdMappings1_8.POTION_NAME_TO_ID.get(potionName);
-				}
-				if (splashPotion) {
-					potionName += "_splash";
-				} else if (lingeringPotion) {
-					potionName += "_lingering";
-				}
-				// Don't override custom name
-				if ((displayTag == null || !displayTag.contains("Name")) && PotionIdMappings1_8.POTION_NAME_INDEX.containsKey(potionName)) {
-					tag.put("display", displayTag = new CompoundTag());
-					tag.put(nbtTagName() + "|noDisplay", new ByteTag(true));
-					displayTag.put("Name", new StringTag(PotionIdMappings1_8.POTION_NAME_INDEX.get(potionName)));
-				}
-			}
-			if (splashPotion || lingeringPotion) { // Convert splash and lingering potions to normal potions
-				item.setIdentifier(373);
-				data += 8192;
-			}
+        CompoundTag displayTag = tag == null ? null : tag.getCompoundTag("display");
+        if (item.data() != 0) {
+            final ByteTag unbreakableTag = tag == null ? null : tag.getByteTag("Unbreakable");
+            if (unbreakableTag != null && unbreakableTag.asByte() != 0) {
+                tag.put(nbtTagName() + "|Unbreakable", new ByteTag(unbreakableTag.asByte()));
+                tag.remove("Unbreakable");
 
-			item.setData((short) data);
-		}
+                if (displayTag == null) { // Remove the display tag again if it was only added to emulate unbreakable
+                    tag.put("display", displayTag = new CompoundTag());
+                    tag.put(nbtTagName() + "|noDisplay", new ByteTag(true));
+                }
 
-		final ListTag<CompoundTag> attributeModifiers = tag == null ? null : tag.getListTag("AttributeModifiers", CompoundTag.class);
-		if (attributeModifiers != null) {
-			tag.put(nbtTagName() + "|AttributeModifiers", attributeModifiers.copy());
-			attributeModifiers.getValue().removeIf(entries -> {
-				final StringTag nameTag = entries.getStringTag("AttributeName");
-				return nameTag != null && !VALID_ATTRIBUTES.contains(nameTag.getValue());
-			});
-		}
+                ListTag<StringTag> loreTag = displayTag.getListTag("Lore", StringTag.class);
+                if (loreTag == null) {
+                    displayTag.put("Lore", loreTag = new ListTag<>(StringTag.class));
+                }
+                loreTag.add(new StringTag("§9Unbreakable"));
+            }
+        }
 
-		return item;
-	}
+        if (item.identifier() == 383 && item.data() == 0) { // Spawn eggs
+            int data = 0;
+            final CompoundTag entityTag = tag == null ? null : tag.getCompoundTag("EntityTag");
+            if (entityTag != null) {
+                final StringTag idTag = entityTag.getStringTag("id");
+                if (idTag != null) {
+                    final String id = idTag.getValue();
+                    if (EntityIds1_8.ENTITY_NAME_TO_ID.containsKey(id)) {
+                        data = EntityIds1_8.ENTITY_NAME_TO_ID.get(id);
+                    } else if (displayTag == null) {
+                        tag.put("display", displayTag = new CompoundTag());
+                        tag.put(nbtTagName() + "|noDisplay", new ByteTag(true));
+                        displayTag.put("Name", new StringTag("§rSpawn " + id));
+                    }
+                }
+            }
+            item.setData((short) data);
+        }
 
-	@Override
-	public Item handleItemToServer(UserConnection connection, Item item) {
-		if (item == null) return null;
-		super.handleItemToServer(connection, item);
+        // Potion, splash potion, lingering potion
+        final boolean potion = item.identifier() == 373;
+        final boolean splashPotion = item.identifier() == 438;
+        final boolean lingeringPotion = item.identifier() == 441;
 
-		CompoundTag tag = item.tag();
+        if (potion || splashPotion || lingeringPotion) {
+            int data = 0;
+            final StringTag potionTag = tag == null ? null : tag.getStringTag("Potion");
+            if (potionTag != null) {
+                String potionName = Key.stripMinecraftNamespace(potionTag.getValue());
+                if (PotionIdMappings1_8.POTION_NAME_TO_ID.containsKey(potionName)) {
+                    data = PotionIdMappings1_8.POTION_NAME_TO_ID.get(potionName);
+                }
+                if (splashPotion) {
+                    potionName += "_splash";
+                } else if (lingeringPotion) {
+                    potionName += "_lingering";
+                }
+                // Don't override custom name
+                if ((displayTag == null || !displayTag.contains("Name")) && PotionIdMappings1_8.POTION_NAME_INDEX.containsKey(potionName)) {
+                    tag.put("display", displayTag = new CompoundTag());
+                    tag.put(nbtTagName() + "|noDisplay", new ByteTag(true));
+                    displayTag.put("Name", new StringTag(PotionIdMappings1_8.POTION_NAME_INDEX.get(potionName)));
+                }
+            }
+            if (splashPotion || lingeringPotion) { // Convert splash and lingering potions to normal potions
+                item.setIdentifier(373);
+                data += 8192;
+            }
 
-		enchantmentRewriter.handleToServer(item);
+            item.setData((short) data);
+        }
 
-		if (item.identifier() == 383 && item.data() != 0) { // Spawn eggs
-			if ((tag == null || !tag.contains("EntityTag")) && EntityIds1_8.ENTITY_ID_TO_NAME.containsKey((int) item.data())) {
-				if (tag == null) {
-					item.setTag(tag = new CompoundTag());
-				}
-				final CompoundTag entityTag = new CompoundTag();
-				entityTag.put("id", new StringTag(EntityIds1_8.ENTITY_ID_TO_NAME.get((int) item.data())));
-				tag.put("EntityTag", entityTag);
-			}
-			item.setData((short) 0);
-		}
+        final ListTag<CompoundTag> attributeModifiers = tag == null ? null : tag.getListTag("AttributeModifiers", CompoundTag.class);
+        if (attributeModifiers != null) {
+            tag.put(nbtTagName() + "|AttributeModifiers", attributeModifiers.copy());
+            attributeModifiers.getValue().removeIf(entries -> {
+                final StringTag nameTag = entries.getStringTag("AttributeName");
+                return nameTag != null && !VALID_ATTRIBUTES.contains(nameTag.getValue());
+            });
+        }
 
-		if (item.identifier() == 373 && (tag == null || !tag.contains("Potion"))) { // Potions
+        // Colors the fake leather armor for an elytra gray
+        if (originalId == 443) {
+            if (tag == null) {
+                item.setTag(tag = new CompoundTag());
+            }
+            CompoundTag display = tag.getCompoundTag("display");
+            if (display == null) {
+                tag.put("display", display = new CompoundTag());
+            }
+            display.put("color", new IntTag(0x737373)); // Gray
+            tag.put(nbtTagName() + "|noDisplay", new ByteTag(true));
+        }
+
+        // Makes the fake banner for a shield brown if it has no banner patterns
+        if (originalId == 442) {
+            final CompoundTag blockEntityTag = tag == null ? null : tag.getCompoundTag("BlockEntityTag");
+            final ListTag<CompoundTag> patterns = blockEntityTag == null ? null : blockEntityTag.getListTag("Patterns", CompoundTag.class);
+            if (patterns == null || patterns.isEmpty()) {
+                item.setData((short) 3); // Brown
+                if (tag == null) {
+                    item.setTag(tag = new CompoundTag());
+                }
+                tag.put(nbtTagName() + "|noData", new ByteTag(true));
+            }
+        }
+
+        return item;
+    }
+
+    @Override
+    public Item handleItemToServer(UserConnection connection, Item item) {
+        if (item == null) return null;
+        super.handleItemToServer(connection, item);
+
+        CompoundTag tag = item.tag();
+
+        enchantmentRewriter.handleToServer(item);
+
+        if (item.identifier() == 383 && item.data() != 0) { // Spawn eggs
+            if ((tag == null || !tag.contains("EntityTag")) && EntityIds1_8.ENTITY_ID_TO_NAME.containsKey((int) item.data())) {
+                if (tag == null) {
+                    item.setTag(tag = new CompoundTag());
+                }
+                final CompoundTag entityTag = new CompoundTag();
+                entityTag.put("id", new StringTag(EntityIds1_8.ENTITY_ID_TO_NAME.get((int) item.data())));
+                tag.put("EntityTag", entityTag);
+            }
+            item.setData((short) 0);
+        }
+
+        if (item.identifier() == 373) { // Potions
+            // Restore the splash id even when a Potion tag is present (e.g. items re-sent by a creative mode client)
             if (item.data() >= 16384) {
-				item.setIdentifier(438);
-				item.setData((short) (item.data() - 8192));
-			}
+                item.setIdentifier(438);
+                item.setData((short) (item.data() - 8192));
+            }
 
-			if (tag == null) {
-				item.setTag(tag = new CompoundTag());
+            if (tag == null) {
+                item.setTag(tag = new CompoundTag());
 
-				final String name = item.data() == 8192 ? "water" : PotionIdMappings1_9.potionNameFromDamage(item.data());
-				tag.put("Potion", new StringTag("minecraft:" + name));
-			}
-			item.setData((short) 0);
-		}
+                final String name = item.data() == 8192 ? "water" : PotionIdMappings1_9.potionNameFromDamage(item.data());
+                tag.put("Potion", new StringTag("minecraft:" + name));
+            }
+            item.setData((short) 0);
+        }
 
-		if (tag == null) {
-			return item;
-		}
-		final Tag noDisplayTag = tag.remove(nbtTagName() + "|noDisplay");
-		if (noDisplayTag != null) {
-			tag.remove("display");
-			if (tag.isEmpty()) {
-				item.setTag(null);
-			}
-		}
-		final Tag unbreakableTag = tag.remove(nbtTagName() + "|Unbreakable");
-		if (unbreakableTag != null) {
-			tag.put("Unbreakable", unbreakableTag);
-		}
-		final Tag attributeModifiersTag = tag.remove(nbtTagName() + "|AttributeModifiers");
-		if (attributeModifiersTag != null) {
-			tag.put("AttributeModifiers", attributeModifiersTag);
-		}
+        if (tag == null) {
+            return item;
+        }
+        if (tag.remove(nbtTagName() + "|noData") != null) {
+            item.setData((short) 0);
+        }
+        final Tag noDisplayTag = tag.remove(nbtTagName() + "|noDisplay");
+        if (noDisplayTag != null) {
+            tag.remove("display");
+            if (tag.isEmpty()) {
+                item.setTag(null);
+            }
+        }
+        final Tag unbreakableTag = tag.remove(nbtTagName() + "|Unbreakable");
+        if (unbreakableTag != null) {
+            tag.put("Unbreakable", unbreakableTag);
+        }
+        final Tag attributeModifiersTag = tag.remove(nbtTagName() + "|AttributeModifiers");
+        if (attributeModifiersTag != null) {
+            tag.put("AttributeModifiers", attributeModifiersTag);
+        }
 
-		return item;
-	}
+        return item;
+    }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_9to1_8/rewriter/WorldPacketRewriter1_9.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -17,10 +17,14 @@
  */
 package com.viaversion.viarewind.protocol.v1_9to1_8.rewriter;
 
+import com.viaversion.nbt.tag.CompoundTag;
+import com.viaversion.nbt.tag.StringTag;
 import com.viaversion.nbt.tag.Tag;
 import com.viaversion.viarewind.ViaRewind;
 import com.viaversion.viarewind.protocol.v1_9to1_8.Protocol1_9To1_8;
+import com.viaversion.viarewind.protocol.v1_9to1_8.data.CommandBlockState;
 import com.viaversion.viarewind.protocol.v1_9to1_8.data.EffectIdMappings1_8;
+import com.viaversion.viarewind.protocol.v1_9to1_8.storage.CommandBlockStateStorage;
 import com.viaversion.viaversion.api.minecraft.BlockPosition;
 import com.viaversion.viaversion.api.minecraft.Environment;
 import com.viaversion.viaversion.api.minecraft.chunks.BaseChunk;
@@ -37,235 +41,272 @@ import com.viaversion.viaversion.api.type.types.chunk.ChunkType1_8;
 import com.viaversion.viaversion.api.type.types.chunk.ChunkType1_9_1;
 import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ClientboundPackets1_8;
 import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ClientboundPackets1_9;
-import com.viaversion.nbt.tag.CompoundTag;
-import com.viaversion.nbt.tag.StringTag;
-
 import java.util.ArrayList;
 
 public class WorldPacketRewriter1_9 extends RewriterBase<Protocol1_9To1_8> {
 
-	public WorldPacketRewriter1_9(Protocol1_9To1_8 protocol) {
-		super(protocol);
-	}
+    public WorldPacketRewriter1_9(Protocol1_9To1_8 protocol) {
+        super(protocol);
+    }
 
-	@Override
-	protected void registerPackets() {
-		protocol.registerClientbound(ClientboundPackets1_9.BLOCK_ENTITY_DATA, new PacketHandlers() {
-			@Override
-			public void register() {
-				map(Types.BLOCK_POSITION1_8); // Position
-				map(Types.UNSIGNED_BYTE); // Action
-				map(Types.NAMED_COMPOUND_TAG); // Tag
-				handler(wrapper -> {
-					final CompoundTag tag = wrapper.get(Types.NAMED_COMPOUND_TAG, 0);
+    @Override
+    protected void registerPackets() {
+        protocol.registerClientbound(ClientboundPackets1_9.BLOCK_ENTITY_DATA, new PacketHandlers() {
+            @Override
+            public void register() {
+                map(Types.BLOCK_POSITION1_8); // Position
+                map(Types.UNSIGNED_BYTE); // Action
+                map(Types.NAMED_COMPOUND_TAG); // Tag
+                handler(wrapper -> {
+                    final CompoundTag tag = wrapper.get(Types.NAMED_COMPOUND_TAG, 0);
+                    final short action = wrapper.get(Types.UNSIGNED_BYTE, 0);
 
-					if (tag.remove("SpawnData") instanceof CompoundTag spawnData) {
-						final Tag id = spawnData.remove("id");
-						if (id instanceof StringTag) {
-							tag.put("EntityId", id);
-						}
-					}
-				});
-			}
-		});
+                    if (action == 2) {
+                        final BlockPosition position = wrapper.get(Types.BLOCK_POSITION1_8, 0);
+                        CommandBlockState.decorateCommand(tag, wrapper.user().get(CommandBlockStateStorage.class).state(position));
+                    }
 
-		protocol.registerClientbound(ClientboundPackets1_9.BLOCK_EVENT, new PacketHandlers() {
-			@Override
-			public void register() {
-				map(Types.BLOCK_POSITION1_8); // Position
-				map(Types.UNSIGNED_BYTE); // Byte 1 (depending on block type)
-				map(Types.UNSIGNED_BYTE); // Byte 2 (depending on block type)
-				map(Types.VAR_INT); // Block
-				handler(wrapper -> {
-					final int block = wrapper.get(Types.VAR_INT, 0);
-					if (block >= 219 && block <= 234) {
-						wrapper.set(Types.VAR_INT, 0, 130);
-					}
-				});
-			}
-		});
+                    if (tag.remove("SpawnData") instanceof CompoundTag spawnData) {
+                        final Tag id = spawnData.remove("id");
+                        if (id instanceof StringTag) {
+                            tag.put("EntityId", id);
+                        }
+                    }
+                });
+            }
+        });
 
-		protocol.registerClientbound(ClientboundPackets1_9.CUSTOM_SOUND, new PacketHandlers() {
-			@Override
-			public void register() {
-				map(Types.STRING); // Sound name
-				handler(wrapper -> {
-					String name = wrapper.get(Types.STRING, 0);
-					name = protocol.getMappingData().getMappedNamedSound(name);
-					if (name == null) {
-						wrapper.cancel();
-					} else {
-						wrapper.set(Types.STRING, 0, name);
-					}
-				});
-				read(Types.VAR_INT); // Sound category
-				map(Types.INT); // Effect position x
-				map(Types.INT); // Effect position y
-				map(Types.INT); // Effect position z
-				map(Types.FLOAT); // Volume
-				map(Types.UNSIGNED_BYTE); // Pitch
-			}
-		});
+        protocol.registerClientbound(ClientboundPackets1_9.BLOCK_EVENT, new PacketHandlers() {
+            @Override
+            public void register() {
+                map(Types.BLOCK_POSITION1_8); // Position
+                map(Types.UNSIGNED_BYTE); // Byte 1 (depending on block type)
+                map(Types.UNSIGNED_BYTE); // Byte 2 (depending on block type)
+                map(Types.VAR_INT); // Block
+                handler(wrapper -> {
+                    final int block = wrapper.get(Types.VAR_INT, 0);
+                    if (block >= 219 && block <= 234) {
+                        wrapper.set(Types.VAR_INT, 0, 130);
+                    }
+                });
+            }
+        });
 
-		protocol.registerClientbound(ClientboundPackets1_9.FORGET_LEVEL_CHUNK, ClientboundPackets1_8.LEVEL_CHUNK, new PacketHandlers() {
-			@Override
-			public void register() {
-				handler(wrapper -> {
-					final Environment environment = wrapper.user().getClientWorld(Protocol1_9To1_8.class).getEnvironment();
+        protocol.registerClientbound(ClientboundPackets1_9.CUSTOM_SOUND, new PacketHandlers() {
+            @Override
+            public void register() {
+                map(Types.STRING); // Sound name
+                handler(wrapper -> {
+                    String name = wrapper.get(Types.STRING, 0);
+                    name = protocol.getMappingData().getMappedNamedSound(name);
+                    if (name == null) {
+                        return;
+                    }
+                    if (!name.isEmpty()) {
+                        wrapper.set(Types.STRING, 0, name);
+                    } else {
+                        wrapper.cancel();
+                    }
+                });
+                read(Types.VAR_INT); // Sound category
+                map(Types.INT); // Effect position x
+                map(Types.INT); // Effect position y
+                map(Types.INT); // Effect position z
+                map(Types.FLOAT); // Volume
+                map(Types.UNSIGNED_BYTE); // Pitch
+            }
+        });
 
-					final int chunkX = wrapper.read(Types.INT);
-					final int chunkZ = wrapper.read(Types.INT);
+        protocol.registerClientbound(ClientboundPackets1_9.FORGET_LEVEL_CHUNK, ClientboundPackets1_8.LEVEL_CHUNK, new PacketHandlers() {
+            @Override
+            public void register() {
+                handler(wrapper -> {
+                    final Environment environment = wrapper.user().storables(protocol).clientWorld().getEnvironment();
+                    final CommandBlockStateStorage commandBlockStates = wrapper.user().get(CommandBlockStateStorage.class);
 
-					wrapper.write(ChunkType1_8.forEnvironment(environment), new BaseChunk(chunkX, chunkZ, true, false, 0, new ChunkSection[16], null, new ArrayList<>()));
-				});
-			}
-		});
+                    final int chunkX = wrapper.read(Types.INT);
+                    final int chunkZ = wrapper.read(Types.INT);
+                    commandBlockStates.unloadChunk(chunkX, chunkZ);
 
-		protocol.registerClientbound(ClientboundPackets1_9.LEVEL_CHUNK, new PacketHandlers() {
-			@Override
-			public void register() {
-				handler(wrapper -> {
-					final Environment environment = wrapper.user().getClientWorld(Protocol1_9To1_8.class).getEnvironment();
+                    wrapper.write(ChunkType1_8.forEnvironment(environment), new BaseChunk(chunkX, chunkZ, true, false, 0, new ChunkSection[16], null, new ArrayList<>()));
+                });
+            }
+        });
 
-					Chunk chunk = wrapper.read(ChunkType1_9_1.forEnvironment(environment));
+        protocol.registerClientbound(ClientboundPackets1_9.LEVEL_CHUNK, new PacketHandlers() {
+            @Override
+            public void register() {
+                handler(wrapper -> {
+                    final Environment environment = wrapper.user().storables(protocol).clientWorld().getEnvironment();
+                    final CommandBlockStateStorage commandBlockStates = wrapper.user().get(CommandBlockStateStorage.class);
 
-					for (ChunkSection section : chunk.getSections()) {
-						if (section == null) continue;
-						DataPalette palette = section.palette(PaletteType.BLOCKS);
-						for (int i = 0; i < palette.size(); i++) {
-							int block = palette.idByIndex(i);
-							int replacedBlock = protocol.getItemRewriter().handleBlockId(block);
-							palette.setIdByIndex(i, replacedBlock);
-						}
-					}
+                    Chunk chunk = wrapper.read(ChunkType1_9_1.forEnvironment(environment));
+                    final Chunk originalChunk = chunk;
 
-					if (chunk.isFullChunk() && chunk.getBitmask() == 0) { // This would be an unload packet for 1.8 clients. Just set one air section
-						boolean skylight = environment == Environment.NORMAL;
-						ChunkSection[] sections = new ChunkSection[16];
-						ChunkSection section = new ChunkSectionImpl(true);
-						sections[0] = section;
-						section.palette(PaletteType.BLOCKS).addId(0);
-						if (skylight) section.getLight().setSkyLight(new byte[2048]);
-						chunk = new BaseChunk(chunk.getX(), chunk.getZ(), true, false, 1, sections, chunk.getBiomeData(), chunk.getBlockEntities());
-					}
+                    chunk.getBlockEntities().forEach(nbt -> {
+                        if (!nbt.contains("x") || !nbt.contains("y") || !nbt.contains("z")) {
+                            return;
+                        }
 
-					wrapper.write(ChunkType1_8.forEnvironment(environment), chunk);
+                        final BlockPosition position = new BlockPosition((int) nbt.get("x").getValue(), (int) nbt.get("y").getValue(), (int) nbt.get("z").getValue());
+                        final int blockState = blockStateAt(originalChunk, position);
+                        if (CommandBlockState.isCommandBlock(blockState)) {
+                            commandBlockStates.storeOrRemove(position, blockState);
+                            CommandBlockState.decorateCommand(nbt, blockState);
+                        }
+                    });
 
-					chunk.getBlockEntities().forEach(nbt -> {
-						if (!nbt.contains("x") || !nbt.contains("y") || !nbt.contains("z") || !nbt.contains("id")) {
-							return;
-						}
-						BlockPosition position = new BlockPosition((int) nbt.get("x").getValue(), (int) nbt.get("y").getValue(), (int) nbt.get("z").getValue());
-						String id = (String) nbt.get("id").getValue();
+                    for (ChunkSection section : chunk.getSections()) {
+                        if (section == null) continue;
+                        DataPalette palette = section.palette(PaletteType.BLOCKS);
+                        for (int i = 0; i < palette.size(); i++) {
+                            int block = palette.idByIndex(i);
+                            int replacedBlock = protocol.getItemRewriter().handleBlockId(block);
+                            palette.setIdByIndex(i, replacedBlock);
+                        }
+                    }
 
-						short action;
-						switch (id) {
-							case "minecraft:mob_spawner":
-								action = 1;
-								break;
-							case "minecraft:command_block":
-								action = 2;
-								break;
-							case "minecraft:beacon":
-								action = 3;
-								break;
-							case "minecraft:skull":
-								action = 4;
-								break;
-							case "minecraft:flower_pot":
-								action = 5;
-								break;
-							case "minecraft:banner":
-								action = 6;
-								break;
-							default:
-								return;
-						}
+                    if (chunk.isFullChunk() && chunk.getBitmask() == 0) { // This would be an unload packet for 1.8 clients. Just set one air section
+                        boolean skylight = environment == Environment.NORMAL;
+                        ChunkSection[] sections = new ChunkSection[16];
+                        ChunkSection section = new ChunkSectionImpl(true);
+                        sections[0] = section;
+                        section.palette(PaletteType.BLOCKS).addId(0);
+                        if (skylight) section.getLight().setSkyLight(new byte[2048]);
+                        chunk = new BaseChunk(chunk.getX(), chunk.getZ(), true, false, 1, sections, chunk.getBiomeData(), chunk.getBlockEntities());
+                    }
 
-						final PacketWrapper blockEntityData = PacketWrapper.create(ClientboundPackets1_9.BLOCK_ENTITY_DATA, wrapper.user());
-						blockEntityData.write(Types.BLOCK_POSITION1_8, position);
-						blockEntityData.write(Types.UNSIGNED_BYTE, action);
-						blockEntityData.write(Types.NAMED_COMPOUND_TAG, nbt);
-						blockEntityData.scheduleSend(Protocol1_9To1_8.class, false);
-					});
-				});
-			}
-		});
+                    wrapper.write(ChunkType1_8.forEnvironment(environment), chunk);
 
-		protocol.registerClientbound(ClientboundPackets1_9.LEVEL_EVENT, new PacketHandlers() {
-			@Override
-			public void register() {
-				map(Types.INT); // Effect id
-				map(Types.BLOCK_POSITION1_8); // Position
-				map(Types.INT); // data
-				map(Types.BOOLEAN); // disable relative volume
-				handler(wrapper -> {
-					int id = wrapper.get(Types.INT, 0);
-					id = EffectIdMappings1_8.getOldId(id);
-					if (id == -1) {
-						wrapper.cancel();
-						return;
-					}
-					wrapper.set(Types.INT, 0, id);
-					if (id == 2001) {
-						int replacedBlock = protocol.getItemRewriter().handleBlockId(wrapper.get(Types.INT, 1));
-						wrapper.set(Types.INT, 1, replacedBlock);
-					}
-				});
-			}
-		});
+                    chunk.getBlockEntities().forEach(nbt -> {
+                        if (!nbt.contains("x") || !nbt.contains("y") || !nbt.contains("z") || !nbt.contains("id")) {
+                            return;
+                        }
+                        BlockPosition position = new BlockPosition((int) nbt.get("x").getValue(), (int) nbt.get("y").getValue(), (int) nbt.get("z").getValue());
+                        String id = (String) nbt.get("id").getValue();
 
-		protocol.registerClientbound(ClientboundPackets1_9.LEVEL_PARTICLES, new PacketHandlers() {
-			@Override
-			public void register() {
-				map(Types.INT); // Particle id
-				handler(wrapper -> {
-					int id = wrapper.get(Types.INT, 0);
-					if (id > 41 && !ViaRewind.getConfig().isReplaceParticles()) {
-						wrapper.cancel();
-						return;
-					}
-					if (id == 42) { // Dragon Breath
-						wrapper.set(Types.INT, 0, 24); // Portal
-					} else if (id == 43) { // End Rod
-						wrapper.set(Types.INT, 0, 3); // Firework Spark
-					} else if (id == 44) { // Damage Indicator
-						wrapper.set(Types.INT, 0, 34); // Heart
-					} else if (id == 45) { // Sweep Attack
-						wrapper.set(Types.INT, 0, 1); // Large Explosion
-					}
-				});
-			}
-		});
+                        short action;
+                        switch (id) {
+                            case "minecraft:mob_spawner":
+                                action = 1;
+                                break;
+                            case "minecraft:command_block":
+                                action = 2;
+                                break;
+                            case "minecraft:beacon":
+                                action = 3;
+                                break;
+                            case "minecraft:skull":
+                                action = 4;
+                                break;
+                            case "minecraft:flower_pot":
+                                action = 5;
+                                break;
+                            case "minecraft:banner":
+                                action = 6;
+                                break;
+                            default:
+                                return;
+                        }
 
-		protocol.registerClientbound(ClientboundPackets1_9.MAP_ITEM_DATA, new PacketHandlers() {
-			@Override
-			public void register() {
-				map(Types.VAR_INT); // Item damage
-				map(Types.BYTE); // Scale
-				read(Types.BOOLEAN); // Tracking position
-			}
-		});
+                        final PacketWrapper blockEntityData = PacketWrapper.create(ClientboundPackets1_9.BLOCK_ENTITY_DATA, wrapper.user());
+                        blockEntityData.write(Types.BLOCK_POSITION1_8, position);
+                        blockEntityData.write(Types.UNSIGNED_BYTE, action);
+                        blockEntityData.write(Types.NAMED_COMPOUND_TAG, nbt);
+                        blockEntityData.scheduleSend(Protocol1_9To1_8.class, false);
+                    });
+                });
+            }
+        });
 
-		protocol.registerClientbound(ClientboundPackets1_9.SOUND, ClientboundPackets1_8.CUSTOM_SOUND, new PacketHandlers() {
-			@Override
-			public void register() {
-				handler(wrapper -> {
-					final int soundId = wrapper.read(Types.VAR_INT);
-					final String soundName = protocol.getMappingData().soundName(soundId);
-					if (soundName == null) {
-						wrapper.cancel();
-					} else {
-						wrapper.write(Types.STRING, protocol.getMappingData().getMappedNamedSound(soundName));
-					}
-				});
-				read(Types.VAR_INT); // Sound category
-				map(Types.INT); // Effect position x
-				map(Types.INT); // Effect position y
-				map(Types.INT); // Effect position z
-				map(Types.FLOAT); // Volume
-				map(Types.UNSIGNED_BYTE); // Pitch
-			}
-		});
-	}
+        protocol.registerClientbound(ClientboundPackets1_9.LEVEL_EVENT, new PacketHandlers() {
+            @Override
+            public void register() {
+                map(Types.INT); // Effect id
+                map(Types.BLOCK_POSITION1_8); // Position
+                map(Types.INT); // data
+                map(Types.BOOLEAN); // disable relative volume
+                handler(wrapper -> {
+                    int id = wrapper.get(Types.INT, 0);
+                    id = EffectIdMappings1_8.getOldId(id);
+                    if (id == -1) {
+                        wrapper.cancel();
+                        return;
+                    }
+                    wrapper.set(Types.INT, 0, id);
+                    if (id == 2001) {
+                        int replacedBlock = protocol.getItemRewriter().handleBlockId(wrapper.get(Types.INT, 1));
+                        wrapper.set(Types.INT, 1, replacedBlock);
+                    }
+                });
+            }
+        });
+
+        protocol.registerClientbound(ClientboundPackets1_9.LEVEL_PARTICLES, new PacketHandlers() {
+            @Override
+            public void register() {
+                map(Types.INT); // Particle id
+                handler(wrapper -> {
+                    int id = wrapper.get(Types.INT, 0);
+                    if (id > 41 && !ViaRewind.getConfig().isReplaceParticles()) {
+                        wrapper.cancel();
+                        return;
+                    }
+                    if (id == 42) { // Dragon Breath
+                        wrapper.set(Types.INT, 0, 24); // Portal
+                    } else if (id == 43) { // End Rod
+                        wrapper.set(Types.INT, 0, 3); // Firework Spark
+                    } else if (id == 44) { // Damage Indicator
+                        wrapper.set(Types.INT, 0, 34); // Heart
+                    } else if (id == 45) { // Sweep Attack
+                        wrapper.set(Types.INT, 0, 1); // Large Explosion
+                    }
+                });
+            }
+        });
+
+        protocol.registerClientbound(ClientboundPackets1_9.MAP_ITEM_DATA, new PacketHandlers() {
+            @Override
+            public void register() {
+                map(Types.VAR_INT); // Item damage
+                map(Types.BYTE); // Scale
+                read(Types.BOOLEAN); // Tracking position
+            }
+        });
+
+        protocol.registerClientbound(ClientboundPackets1_9.SOUND, ClientboundPackets1_8.CUSTOM_SOUND, new PacketHandlers() {
+            @Override
+            public void register() {
+                handler(wrapper -> {
+                    final int soundId = wrapper.read(Types.VAR_INT);
+                    final int mappedSoundId = protocol.getMappingData().getFullSoundMappings().getNewId(soundId);
+                    if (mappedSoundId == -1) {
+                        wrapper.cancel();
+                    } else {
+                        wrapper.write(Types.STRING, protocol.getMappingData().getFullSoundMappings().mappedIdentifier(mappedSoundId));
+                    }
+                });
+                read(Types.VAR_INT); // Sound category
+                map(Types.INT); // Effect position x
+                map(Types.INT); // Effect position y
+                map(Types.INT); // Effect position z
+                map(Types.FLOAT); // Volume
+                map(Types.UNSIGNED_BYTE); // Pitch
+            }
+        });
+    }
+
+    private static int blockStateAt(final Chunk chunk, final BlockPosition position) {
+        final int sectionY = position.y() >> 4;
+        if (sectionY < 0 || sectionY >= chunk.getSections().length) {
+            return -1;
+        }
+
+        final ChunkSection section = chunk.getSections()[sectionY];
+        if (section == null) {
+            return -1;
+        }
+
+        return section.palette(PaletteType.BLOCKS).idAt(position.x() & 0xF, position.y() & 0xF, position.z() & 0xF);
+    }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_9to1_8/storage/BlockPlaceDestroyTracker.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -20,24 +20,24 @@ package com.viaversion.viarewind.protocol.v1_9to1_8.storage;
 import com.viaversion.viaversion.api.connection.StorableObject;
 
 public class BlockPlaceDestroyTracker implements StorableObject {
-	private long lastMining;
+    private long lastMining;
 
-	public boolean isMining() {
-		long time = System.currentTimeMillis() - lastMining;
-		return time < 75;
-	}
+    public boolean isMining() {
+        long time = System.currentTimeMillis() - lastMining;
+        return time < 75;
+    }
 
-	public void setMining() {
-		lastMining = System.currentTimeMillis();
-	}
+    public void setMining() {
+        lastMining = System.currentTimeMillis();
+    }
 
-	public void updateMining() {
-		if (this.isMining()) {
-			lastMining = System.currentTimeMillis();
-		}
-	}
+    public void updateMining() {
+        if (this.isMining()) {
+            lastMining = System.currentTimeMillis();
+        }
+    }
 
-	public void setLastMining(long lastMining) {
-		this.lastMining = lastMining;
-	}
+    public void setLastMining(long lastMining) {
+        this.lastMining = lastMining;
+    }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_9to1_8/storage/BossBarStorage.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -20,65 +20,64 @@ package com.viaversion.viarewind.protocol.v1_9to1_8.storage;
 import com.viaversion.viarewind.protocol.v1_9to1_8.data.WitherBossBar;
 import com.viaversion.viaversion.api.connection.StoredObject;
 import com.viaversion.viaversion.api.connection.UserConnection;
-
 import java.util.HashMap;
 import java.util.Map;
 import java.util.UUID;
 
 public class BossBarStorage extends StoredObject {
 
-	private final Map<UUID, WitherBossBar> bossBars = new HashMap<>();
+    private final Map<UUID, WitherBossBar> bossBars = new HashMap<>();
 
-	public BossBarStorage(UserConnection user) {
-		super(user);
-	}
+    public BossBarStorage(UserConnection user) {
+        super(user);
+    }
 
-	public void reset() {
-		updateLocation();
-		changeWorld();
-	}
+    public void reset() {
+        updateLocation();
+        changeWorld();
+    }
 
-	public void add(UUID uuid, String title, float health) {
-		WitherBossBar bossBar = new WitherBossBar(this.getUser(), uuid, title, health);
-		PlayerPositionTracker playerPositionTracker = this.getUser().get(PlayerPositionTracker.class);
-		bossBar.setPlayerLocation(playerPositionTracker.getPosX(), playerPositionTracker.getPosY(), playerPositionTracker.getPosZ(), playerPositionTracker.getYaw(), playerPositionTracker.getPitch());
-		bossBar.show();
-		bossBars.put(uuid, bossBar);
-	}
+    public void add(UUID uuid, String title, float health) {
+        WitherBossBar bossBar = new WitherBossBar(this.getUser(), uuid, title, health);
+        PlayerPositionTracker playerPositionTracker = this.getUser().get(PlayerPositionTracker.class);
+        bossBar.setPlayerLocation(playerPositionTracker.getPosX(), playerPositionTracker.getPosY(), playerPositionTracker.getPosZ(), playerPositionTracker.getYaw(), playerPositionTracker.getPitch());
+        bossBar.show();
+        bossBars.put(uuid, bossBar);
+    }
 
-	public void remove(UUID uuid) {
-		WitherBossBar bossBar = bossBars.remove(uuid);
-		if (bossBar == null) return;
-		bossBar.hide();
-	}
+    public void remove(UUID uuid) {
+        WitherBossBar bossBar = bossBars.remove(uuid);
+        if (bossBar == null) return;
+        bossBar.hide();
+    }
 
-	public void updateLocation() {
-		PlayerPositionTracker playerPositionTracker = this.getUser().get(PlayerPositionTracker.class);
-		bossBars.values().forEach(bossBar -> {
-			try {
-				bossBar.setPlayerLocation(playerPositionTracker.getPosX(), playerPositionTracker.getPosY(), playerPositionTracker.getPosZ(), playerPositionTracker.getYaw(), playerPositionTracker.getPitch());
-			} catch (Exception e) {
-				throw new RuntimeException(e);
-			}
-		});
-	}
+    public void updateLocation() {
+        PlayerPositionTracker playerPositionTracker = this.getUser().get(PlayerPositionTracker.class);
+        bossBars.values().forEach(bossBar -> {
+            try {
+                bossBar.setPlayerLocation(playerPositionTracker.getPosX(), playerPositionTracker.getPosY(), playerPositionTracker.getPosZ(), playerPositionTracker.getYaw(), playerPositionTracker.getPitch());
+            } catch (Exception e) {
+                throw new RuntimeException(e);
+            }
+        });
+    }
 
-	public void changeWorld() {
-		bossBars.values().forEach(bossBar -> {
-			bossBar.hide();
-			bossBar.show();
-		});
-	}
+    public void changeWorld() {
+        bossBars.values().forEach(bossBar -> {
+            bossBar.hide();
+            bossBar.show();
+        });
+    }
 
-	public void updateHealth(UUID uuid, float health) {
-		WitherBossBar bossBar = bossBars.get(uuid);
-		if (bossBar == null) return;
-		bossBar.setHealth(health);
-	}
+    public void updateHealth(UUID uuid, float health) {
+        WitherBossBar bossBar = bossBars.get(uuid);
+        if (bossBar == null) return;
+        bossBar.setHealth(health);
+    }
 
-	public void updateTitle(UUID uuid, String title) {
-		WitherBossBar bossBar = bossBars.get(uuid);
-		if (bossBar == null) return;
-		bossBar.setTitle(title);
-	}
+    public void updateTitle(UUID uuid, String title) {
+        WitherBossBar bossBar = bossBars.get(uuid);
+        if (bossBar == null) return;
+        bossBar.setTitle(title);
+    }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_9to1_8/storage/CommandBlockStateStorage.java

@@ -0,0 +1,52 @@
+/*
+ * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
+ * Copyright (C) 2018-2026 ViaVersion and contributors
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viarewind.protocol.v1_9to1_8.storage;
+
+import com.viaversion.viarewind.protocol.v1_9to1_8.data.CommandBlockState;
+import com.viaversion.viaversion.api.connection.StorableObject;
+import com.viaversion.viaversion.api.minecraft.BlockPosition;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+
+public final class CommandBlockStateStorage implements StorableObject {
+
+    private final Map<BlockPosition, Integer> commandBlockStates = new HashMap<>();
+
+    public void storeOrRemove(final BlockPosition position, final int blockState) {
+        if (CommandBlockState.isCommandBlock(blockState)) {
+            commandBlockStates.put(position, blockState);
+        } else {
+            commandBlockStates.remove(position);
+        }
+    }
+
+    public int state(final BlockPosition position) {
+        return commandBlockStates.getOrDefault(position, -1);
+    }
+
+    public void unloadChunk(final int chunkX, final int chunkZ) {
+        final Iterator<BlockPosition> iterator = commandBlockStates.keySet().iterator();
+        while (iterator.hasNext()) {
+            final BlockPosition position = iterator.next();
+            if (position.x() >> 4 == chunkX && position.z() >> 4 == chunkZ) {
+                iterator.remove();
+            }
+        }
+    }
+}

common/src/main/java/com/viaversion/viarewind/protocol/v1_9to1_8/storage/CooldownStorage.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -22,101 +22,100 @@ import com.viaversion.viarewind.protocol.v1_9to1_8.cooldown.CooldownVisualizatio
 import com.viaversion.viaversion.api.connection.StorableObject;
 import com.viaversion.viaversion.api.connection.UserConnection;
 import com.viaversion.viaversion.util.Pair;
-
 import java.util.List;
 import java.util.logging.Level;
 
 public class CooldownStorage implements StorableObject {
 
-	private CooldownVisualization.Factory visualizationFactory = CooldownVisualization.Factory.fromConfiguration();
-	private CooldownVisualization current;
+    private CooldownVisualization.Factory visualizationFactory = CooldownVisualization.Factory.fromConfiguration();
+    private CooldownVisualization current;
 
-	private double attackSpeed = 4.0;
-	private long lastHit = 0;
+    private double attackSpeed = 4.0;
+    private long lastHit = 0;
 
-	public void tick(final UserConnection connection) {
-		if (!hasCooldown()) {
-			endCurrentVisualization();
-			return;
-		}
-		BlockPlaceDestroyTracker tracker = connection.get(BlockPlaceDestroyTracker.class);
-		if (tracker.isMining()) {
-			lastHit = 0;
-			endCurrentVisualization();
-			return;
-		}
-		if (current == null) {
-			current = visualizationFactory.create(connection);
-		}
-		try {
-			current.show(getCooldown());
-		} catch (Exception exception) {
-			ViaRewind.getPlatform().getLogger().log(Level.WARNING, "Unable to show cooldown visualization", exception);
-		}
-	}
+    public void tick(final UserConnection connection) {
+        if (!hasCooldown()) {
+            endCurrentVisualization();
+            return;
+        }
+        BlockPlaceDestroyTracker tracker = connection.get(BlockPlaceDestroyTracker.class);
+        if (tracker.isMining()) {
+            lastHit = 0;
+            endCurrentVisualization();
+            return;
+        }
+        if (current == null) {
+            current = visualizationFactory.create(connection);
+        }
+        try {
+            current.show(getCooldown());
+        } catch (Exception exception) {
+            ViaRewind.getPlatform().getLogger().log(Level.WARNING, "Unable to show cooldown visualization", exception);
+        }
+    }
 
-	private void endCurrentVisualization() {
-		if (current != null) {
-			try {
-				current.hide();
-			} catch (Exception exception) {
-				ViaRewind.getPlatform().getLogger().log(Level.WARNING, "Unable to hide cooldown visualization", exception);
-			}
-			current = null;
-		}
-	}
+    private void endCurrentVisualization() {
+        if (current != null) {
+            try {
+                current.hide();
+            } catch (Exception exception) {
+                ViaRewind.getPlatform().getLogger().log(Level.WARNING, "Unable to hide cooldown visualization", exception);
+            }
+            current = null;
+        }
+    }
 
-	public boolean hasCooldown() {
-		long time = System.currentTimeMillis() - lastHit;
-		double cooldown = restrain(((double) time) * attackSpeed / 1000d, 1.5);
-		return cooldown > 0.1 && cooldown < 1.1;
-	}
+    public boolean hasCooldown() {
+        long time = System.currentTimeMillis() - lastHit;
+        double cooldown = restrain(((double) time) * attackSpeed / 1000d, 1.5);
+        return cooldown > 0.1 && cooldown < 1.1;
+    }
 
-	public double getCooldown() {
-		long time = System.currentTimeMillis() - lastHit;
-		return restrain(((double) time) * attackSpeed / 1000d, 1);
-	}
+    public double getCooldown() {
+        long time = System.currentTimeMillis() - lastHit;
+        return restrain(((double) time) * attackSpeed / 1000d, 1);
+    }
 
-	private double restrain(double x, double b) {
-		if (x < 0) return 0;
-		return Math.min(x, b);
-	}
+    private double restrain(double x, double b) {
+        if (x < 0) return 0;
+        return Math.min(x, b);
+    }
 
-	public void setAttackSpeed(double base, List<Pair<Byte, Double>> modifiers) {
-		attackSpeed = base;
-		for (int j = 0; j < modifiers.size(); j++) {
-			if (modifiers.get(j).key() == 0) {
-				attackSpeed += modifiers.get(j).value();
-				modifiers.remove(j--);
-			}
-		}
-		for (int j = 0; j < modifiers.size(); j++) {
-			if (modifiers.get(j).key() == 1) {
-				attackSpeed += base * modifiers.get(j).value();
-				modifiers.remove(j--);
-			}
-		}
-		for (int j = 0; j < modifiers.size(); j++) {
-			if (modifiers.get(j).key() == 2) {
-				attackSpeed *= (1.0 + modifiers.get(j).value());
-				modifiers.remove(j--);
-			}
-		}
-	}
+    public void setAttackSpeed(double base, List<Pair<Byte, Double>> modifiers) {
+        attackSpeed = base;
+        for (int j = 0; j < modifiers.size(); j++) {
+            if (modifiers.get(j).key() == 0) {
+                attackSpeed += modifiers.get(j).value();
+                modifiers.remove(j--);
+            }
+        }
+        for (int j = 0; j < modifiers.size(); j++) {
+            if (modifiers.get(j).key() == 1) {
+                attackSpeed += base * modifiers.get(j).value();
+                modifiers.remove(j--);
+            }
+        }
+        for (int j = 0; j < modifiers.size(); j++) {
+            if (modifiers.get(j).key() == 2) {
+                attackSpeed *= (1.0 + modifiers.get(j).value());
+                modifiers.remove(j--);
+            }
+        }
+    }
 
-	public void hit() {
-		lastHit = System.currentTimeMillis();
-	}
+    public void hit() {
+        lastHit = System.currentTimeMillis();
+    }
 
-	public void setLastHit(long lastHit) {
-		this.lastHit = lastHit;
-	}
+    public void setLastHit(long lastHit) {
+        this.lastHit = lastHit;
+    }
 
-	public CooldownVisualization.Factory getVisualizationFactory() {
-		return visualizationFactory;
-	}
+    public CooldownVisualization.Factory getVisualizationFactory() {
+        return visualizationFactory;
+    }
 
-	public void setVisualizationFactory(CooldownVisualization.Factory visualizationFactory) {
-		this.visualizationFactory = visualizationFactory;
-	}
+    public void setVisualizationFactory(CooldownVisualization.Factory visualizationFactory) {
+        this.visualizationFactory = visualizationFactory;
+    }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_9to1_8/storage/EntityTracker1_9.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -18,70 +18,110 @@
 package com.viaversion.viarewind.protocol.v1_9to1_8.storage;
 
 import com.viaversion.viaversion.api.connection.UserConnection;
+import com.viaversion.viaversion.api.data.entity.TrackedEntity;
 import com.viaversion.viaversion.api.minecraft.Vector;
 import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_9;
 import com.viaversion.viaversion.data.entity.EntityTrackerBase;
-import com.viaversion.viaversion.libs.fastutil.ints.*;
-
+import com.viaversion.viaversion.libs.fastutil.ints.Int2IntMap;
+import com.viaversion.viaversion.libs.fastutil.ints.Int2IntOpenHashMap;
+import com.viaversion.viaversion.libs.fastutil.ints.Int2ObjectMap;
+import com.viaversion.viaversion.libs.fastutil.ints.Int2ObjectOpenHashMap;
+import com.viaversion.viaversion.libs.fastutil.ints.IntArrayList;
+import com.viaversion.viaversion.libs.fastutil.ints.IntList;
+import com.viaversion.viaversion.libs.fastutil.ints.IntOpenHashSet;
+import com.viaversion.viaversion.libs.fastutil.ints.IntSet;
 import java.util.List;
 import java.util.Map;
 
 public class EntityTracker1_9 extends EntityTrackerBase {
 
-	private final Int2ObjectMap<IntList> vehicles = new Int2ObjectOpenHashMap<>();
-	private final Int2ObjectMap<Vector> offsets = new Int2ObjectOpenHashMap<>();
-	private final Int2IntMap status = new Int2IntOpenHashMap();
+    private final Int2ObjectMap<IntList> vehicles = new Int2ObjectOpenHashMap<>();
+    private final Int2ObjectMap<Vector> offsets = new Int2ObjectOpenHashMap<>();
+    private final Int2IntMap status = new Int2IntOpenHashMap();
+    private final IntSet handActive = new IntOpenHashSet();
+    private final Int2ObjectMap<PendingPotionEntity> pendingPotions = new Int2ObjectOpenHashMap<>();
 
-	public EntityTracker1_9(UserConnection connection) {
-		super(connection, EntityTypes1_9.EntityType.PLAYER);
-	}
+    public EntityTracker1_9(UserConnection connection) {
+        super(connection, EntityTypes1_9.EntityType.PLAYER);
+    }
 
-	@Override
-	public void removeEntity(int id) {
-		vehicles.remove(id);
-		offsets.remove(id);
-		status.remove(id);
+    @Override
+    public TrackedEntity removeEntity(int id) {
+        vehicles.remove(id);
+        offsets.remove(id);
+        status.remove(id);
+        handActive.remove(id);
+        pendingPotions.remove(id);
 
-		vehicles.forEach((vehicle, passengers) -> passengers.rem(id));
-		vehicles.int2ObjectEntrySet().removeIf(entry -> entry.getValue().isEmpty());
-		super.removeEntity(id);
-	}
+        vehicles.forEach((vehicle, passengers) -> passengers.rem(id));
+        vehicles.int2ObjectEntrySet().removeIf(entry -> entry.getValue().isEmpty());
+        return super.removeEntity(id);
+    }
 
-	public void resetEntityOffset(final int id) {
-		offsets.remove(id);
-	}
+    public void resetEntityOffset(final int id) {
+        offsets.remove(id);
+    }
 
-	public Vector getEntityOffset(final int id) {
-		return offsets.get(id);
-	}
+    public Vector getEntityOffset(final int id) {
+        return offsets.get(id);
+    }
 
-	public void setEntityOffset(final int id, Vector offset) {
-		offsets.put(id, offset);
-	}
+    public void setEntityOffset(final int id, Vector offset) {
+        offsets.put(id, offset);
+    }
 
-	public IntList getPassengers(final int id) {
-		return vehicles.getOrDefault(id, new IntArrayList());
-	}
+    public IntList getPassengers(final int id) {
+        return vehicles.getOrDefault(id, new IntArrayList());
+    }
 
-	public void setPassengers(final int id, final IntList passengers) {
-		vehicles.put(id, passengers);
-	}
+    public void setPassengers(final int id, final IntList passengers) {
+        vehicles.put(id, passengers);
+    }
 
-	public boolean isInsideVehicle(final int id) {
-		for (List<Integer> vehicle : vehicles.values()) {
-			if (vehicle.contains(id)) return true;
-		}
-		return false;
-	}
+    public boolean isInsideVehicle(final int id) {
+        for (List<Integer> vehicle : vehicles.values()) {
+            if (vehicle.contains(id)) return true;
+        }
+        return false;
+    }
 
-	public Integer getVehicle(final int passenger) {
-		for (Map.Entry<Integer, IntList> vehicle : vehicles.int2ObjectEntrySet()) {
-			if (vehicle.getValue().contains(passenger)) return vehicle.getKey();
-		}
-		return null;
-	}
+    public Integer getVehicle(final int passenger) {
+        for (Map.Entry<Integer, IntList> vehicle : vehicles.int2ObjectEntrySet()) {
+            if (vehicle.getValue().contains(passenger)) return vehicle.getKey();
+        }
+        return null;
+    }
+
+    public Int2IntMap getStatus() {
+        return status;
+    }
+
+    public boolean isHandActive(final int id) {
+        return handActive.contains(id);
+    }
+
+    public void setHandActive(final int id, final boolean active) {
+        if (active) {
+            handActive.add(id);
+        } else {
+            handActive.remove(id);
+        }
+    }
+
+    public Int2ObjectMap<PendingPotionEntity> getPendingPotions() {
+        return pendingPotions;
+    }
+
+    public record PendingPotionEntity(int x, int y, int z, byte pitch, byte yaw, short velocityX, short velocityY, short velocityZ) {
+
+        public PendingPotionEntity withPosition(final int x, final int y, final int z, final byte pitch, final byte yaw) {
+            return new PendingPotionEntity(x, y, z, pitch, yaw, velocityX, velocityY, velocityZ);
+        }
+
+        public PendingPotionEntity withVelocity(final short velocityX, final short velocityY, final short velocityZ) {
+            return new PendingPotionEntity(x, y, z, pitch, yaw, velocityX, velocityY, velocityZ);
+        }
+
+    }
 
-	public Int2IntMap getStatus() {
-		return status;
-	}
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_9to1_8/storage/LastTitle.java

@@ -0,0 +1,107 @@
+/*
+ * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
+ * Copyright (C) 2018-2026 ViaVersion and contributors
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viarewind.protocol.v1_9to1_8.storage;
+
+import com.viaversion.viaversion.api.connection.StorableObject;
+import com.viaversion.viaversion.libs.gson.JsonElement;
+
+public final class LastTitle implements StorableObject {
+
+    private JsonElement title;
+    private JsonElement subtitle;
+
+    private long visibleSince;
+    private long visibleUntil;
+
+    private int fadeIn;
+    private int stay;
+    private int fadeOut;
+
+    public LastTitle() {
+        this.reset();
+    }
+
+    public void setTitle(final JsonElement title) {
+        this.title = title;
+
+        final long now = System.currentTimeMillis();
+        this.visibleSince = now;
+        this.visibleUntil = now + titleLength();
+    }
+
+    public void setSubtitle(final JsonElement subtitle) {
+        this.subtitle = subtitle;
+    }
+
+    public void setTimes(final int fadeIn, final int stay, final int fadeOut) {
+        this.fadeIn = fadeIn;
+        this.stay = stay;
+        this.fadeOut = fadeOut;
+
+        if (this.visibleUntil > System.currentTimeMillis()) {
+            final long now = System.currentTimeMillis();
+            this.visibleSince = now;
+            this.visibleUntil = now + titleLength();
+        }
+    }
+
+    public void hide() {
+        this.visibleSince = 0;
+        this.visibleUntil = 0;
+    }
+
+    public void reset() {
+        this.hide();
+
+        this.fadeIn = 10;
+        this.stay = 70;
+        this.fadeOut = 20;
+    }
+
+    public boolean isVisible() {
+        return this.title != null && this.visibleUntil > System.currentTimeMillis();
+    }
+
+    public JsonElement title() {
+        return this.title;
+    }
+
+    public JsonElement subtitle() {
+        return this.subtitle;
+    }
+
+    public int[] remainingTimes() {
+        final int fullLength = Math.max(0, this.fadeIn + this.stay + this.fadeOut);
+        final int elapsed = (int) Math.min(fullLength, Math.max(0, (System.currentTimeMillis() - this.visibleSince) / 50L));
+        if (elapsed < this.fadeIn) {
+            return new int[]{this.fadeIn - elapsed, this.stay, this.fadeOut};
+        }
+
+        final int titleEnd = this.fadeIn + this.stay;
+        if (elapsed < titleEnd) {
+            return new int[]{0, titleEnd - elapsed, this.fadeOut};
+        }
+
+        return new int[]{0, 0, fullLength - elapsed};
+    }
+
+    private long titleLength() {
+        return Math.max(0, this.fadeIn + this.stay + this.fadeOut) * 50L;
+    }
+
+}

common/src/main/java/com/viaversion/viarewind/protocol/v1_9to1_8/storage/LevitationStorage.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -21,22 +21,22 @@ import com.viaversion.viaversion.api.connection.StorableObject;
 
 public class LevitationStorage implements StorableObject {
 
-	private boolean active;
-	private int amplifier;
+    private boolean active;
+    private int amplifier;
 
-	public boolean isActive() {
-		return active;
-	}
+    public boolean isActive() {
+        return active;
+    }
 
-	public void setActive(boolean active) {
-		this.active = active;
-	}
+    public void setActive(boolean active) {
+        this.active = active;
+    }
 
-	public int getAmplifier() {
-		return amplifier;
-	}
+    public int getAmplifier() {
+        return amplifier;
+    }
 
-	public void setAmplifier(int amplifier) {
-		this.amplifier = amplifier;
-	}
+    public void setAmplifier(int amplifier) {
+        this.amplifier = amplifier;
+    }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_9to1_8/storage/PlayerPositionTracker.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -20,77 +20,87 @@ package com.viaversion.viarewind.protocol.v1_9to1_8.storage;
 import com.viaversion.viarewind.protocol.v1_9to1_8.Protocol1_9To1_8;
 import com.viaversion.viaversion.api.connection.StorableObject;
 import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
-
 import java.util.Queue;
 import java.util.concurrent.ConcurrentLinkedQueue;
 
 public class PlayerPositionTracker implements StorableObject {
 
-	private final Queue<PacketWrapper> animations = new ConcurrentLinkedQueue<>();
-	private double posX, posY, posZ;
-	private float yaw, pitch;
-	private boolean onGround;
-	private int confirmId = -1;
+    private final Queue<PacketWrapper> animations = new ConcurrentLinkedQueue<>();
+    private final Queue<PendingTeleport> pendingTeleports = new ConcurrentLinkedQueue<>();
+    private double posX, posY, posZ;
+    private float yaw, pitch;
+    private boolean onGround;
 
-	public void setPos(double x, double y, double z) {
-		this.posX = x;
-		this.posY = y;
-		this.posZ = z;
-	}
+    public void setPos(double x, double y, double z) {
+        this.posX = x;
+        this.posY = y;
+        this.posZ = z;
+    }
 
-	public void sendAnimations() {
-		PacketWrapper wrapper;
-		while ((wrapper = animations.poll()) != null) {
-			wrapper.sendToServer(Protocol1_9To1_8.class);
-		}
-	}
+    public void sendAnimations() {
+        PacketWrapper wrapper;
+        while ((wrapper = animations.poll()) != null) {
+            wrapper.sendToServer(Protocol1_9To1_8.class);
+        }
+    }
 
-	public void queueAnimation(final PacketWrapper wrapper) {
-		animations.add(wrapper);
-	}
+    public void queueAnimation(final PacketWrapper wrapper) {
+        animations.add(wrapper);
+    }
 
-	public void setYaw(float yaw) {
-		this.yaw = yaw % 360f;
-	}
+    public double getPosX() {
+        return this.posX;
+    }
 
-	public void setPitch(float pitch) {
-		this.pitch = pitch % 360f;
-	}
+    public double getPosY() {
+        return this.posY;
+    }
 
-	public double getPosX() {
-		return this.posX;
-	}
+    public double getPosZ() {
+        return this.posZ;
+    }
 
-	public double getPosY() {
-		return this.posY;
-	}
+    public float getYaw() {
+        return this.yaw;
+    }
 
-	public double getPosZ() {
-		return this.posZ;
-	}
+    public void setYaw(float yaw) {
+        this.yaw = yaw % 360f;
+    }
 
-	public float getYaw() {
-		return this.yaw;
-	}
+    public float getPitch() {
+        return this.pitch;
+    }
 
-	public float getPitch() {
-		return this.pitch;
-	}
+    public void setPitch(float pitch) {
+        this.pitch = pitch % 360f;
+    }
 
-	public boolean isOnGround() {
-		return this.onGround;
-	}
+    public boolean isOnGround() {
+        return this.onGround;
+    }
 
-	public int getConfirmId() {
-		return this.confirmId;
-	}
+    public void setOnGround(boolean onGround) {
+        this.onGround = onGround;
+    }
 
-	public void setOnGround(boolean onGround) {
-		this.onGround = onGround;
-	}
+    public boolean hasPendingTeleports() {
+        return !this.pendingTeleports.isEmpty();
+    }
 
-	public void setConfirmId(int confirmId) {
-		this.confirmId = confirmId;
-	}
+    public void queueTeleport(final int id, final double x, final double y, final double z, final float yaw, final float pitch, final boolean viewRelative) {
+        this.pendingTeleports.add(new PendingTeleport(id, x, y, z, yaw, pitch, viewRelative));
+    }
+
+    public PendingTeleport peekTeleport() {
+        return this.pendingTeleports.peek();
+    }
+
+    public void confirmTeleport() {
+        this.pendingTeleports.poll();
+    }
+
+    public record PendingTeleport(int id, double x, double y, double z, float yaw, float pitch, boolean viewRelative) {
+    }
 
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_9to1_8/storage/WindowTracker.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -30,83 +30,115 @@ import com.viaversion.viaversion.libs.mcstructs.text.components.StringComponent;
 import com.viaversion.viaversion.libs.mcstructs.text.components.TranslationComponent;
 import com.viaversion.viaversion.libs.mcstructs.text.serializer.TextComponentSerializer;
 import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ClientboundPackets1_8;
-
 import java.util.HashMap;
 import java.util.Map;
 
 public class WindowTracker extends StoredObject {
-	private final HashMap<Short, String> types = new HashMap<>();
-	private final HashMap<Short, Item[]> brewingItems = new HashMap<>();
-	private final Map<Short, Short> enchantmentProperties = new HashMap<>();
+    private final HashMap<Short, String> types = new HashMap<>();
+    private final HashMap<Short, Item[]> brewingItems = new HashMap<>();
+    private final Map<Short, Short> enchantmentProperties = new HashMap<>();
 
-	public WindowTracker(UserConnection user) {
-		super(user);
-	}
+    private short openWindowId = 0;
+    private int openWindowSize = 0; // Translated client container slots, excluding the player inventory
 
-	public String get(short windowId) {
-		return types.get(windowId);
-	}
+    public WindowTracker(UserConnection user) {
+        super(user);
+    }
 
-	public void put(short windowId, String type) {
-		types.put(windowId, type);
-	}
+    public static void updateBrewingStand(UserConnection user, Item blazePowder, short windowId) {
+        if (blazePowder != null && blazePowder.identifier() != 377) {
+            return;
+        }
+        int amount = blazePowder == null ? 0 : blazePowder.amount();
 
-	public void remove(short windowId) {
-		types.remove(windowId);
-		brewingItems.remove(windowId);
-	}
+        PacketWrapper openWindow = PacketWrapper.create(ClientboundPackets1_8.OPEN_SCREEN, user);
+        openWindow.write(Types.UNSIGNED_BYTE, windowId);
+        openWindow.write(Types.STRING, "minecraft:brewing_stand");
 
-	public Item[] getBrewingItems(short windowId) {
-		return brewingItems.computeIfAbsent(windowId, key -> new Item[]{
-				new DataItem(),
-				new DataItem(),
-				new DataItem(),
-				new DataItem()
-		});
-	}
+        TextComponent title = new StringComponent()
+            .append(new TranslationComponent("container.brewing"))
+            .append(new StringComponent(": ").formatted(TextFormatting.DARK_GRAY))
+            .append(new StringComponent(amount + " ").formatted(TextFormatting.DARK_RED))
+            .append(new TranslationComponent("item.blazePowder.name").formatted(TextFormatting.DARK_RED));
 
-	public short getEnchantmentValue(final short key) {
-		if (!enchantmentProperties.containsKey(key)) {
-			return 0;
-		}
-		return enchantmentProperties.remove(key);
-	}
+        openWindow.write(Types.COMPONENT, TextComponentSerializer.V1_8.serializeJson(title));
+        openWindow.write(Types.UNSIGNED_BYTE, (short) 420);
+        openWindow.scheduleSend(Protocol1_9To1_8.class);
 
-	public void putEnchantmentProperty(short key, short value) {
-		enchantmentProperties.put(key, value);
-	}
+        Item[] items = user.get(WindowTracker.class).getBrewingItems(windowId);
+        for (int i = 0; i < items.length; i++) {
+            PacketWrapper setSlot = PacketWrapper.create(ClientboundPackets1_8.CONTAINER_SET_SLOT, user);
+            setSlot.write(Types.BYTE, (byte) windowId);
+            setSlot.write(Types.SHORT, (short) i);
+            setSlot.write(Types.ITEM1_8, items[i]);
+            setSlot.scheduleSend(Protocol1_9To1_8.class);
+        }
+    }
 
-	public void clearEnchantmentProperties() {
-		enchantmentProperties.clear();
-	}
+    public String get(short windowId) {
+        return types.get(windowId);
+    }
 
-	public static void updateBrewingStand(UserConnection user, Item blazePowder, short windowId) {
-		if (blazePowder != null && blazePowder.identifier() != 377) {
-			return;
-		}
-		int amount = blazePowder == null ? 0 : blazePowder.amount();
+    public void put(short windowId, String type) {
+        types.put(windowId, type);
+    }
 
-		PacketWrapper openWindow = PacketWrapper.create(ClientboundPackets1_8.OPEN_SCREEN, user);
-		openWindow.write(Types.UNSIGNED_BYTE, windowId);
-		openWindow.write(Types.STRING, "minecraft:brewing_stand");
+    public void remove(short windowId) {
+        types.remove(windowId);
+        brewingItems.remove(windowId);
+        if (windowId == openWindowId) {
+            openWindowId = 0;
+            openWindowSize = 0;
+        }
+    }
 
-		TextComponent title = new StringComponent().
-			append(new TranslationComponent("container.brewing")).
-			append(new StringComponent(": " + TextFormatting.DARK_GRAY)).
-			append(new StringComponent(amount + " " + TextFormatting.DARK_RED)).
-			append(new TranslationComponent("item.blazePowder.name", TextFormatting.DARK_RED));
+    public void openWindow(final short windowId, final String windowType, final int slotCount) {
+        openWindowId = windowId;
 
-		openWindow.write(Types.COMPONENT, TextComponentSerializer.V1_8.serializeJson(title));
-		openWindow.write(Types.UNSIGNED_BYTE, (short) 420);
-		openWindow.scheduleSend(Protocol1_9To1_8.class);
+        // The client only uses the packet's slot count when constructing dynamic inventories.
+        // Fixed menus construct their own slots; use the translated 1.8 layout for those.
+        openWindowSize = switch (windowType) {
+            case "minecraft:furnace", "minecraft:villager", "minecraft:anvil" -> 3;
+            case "minecraft:brewing_stand" -> 4;
+            case "minecraft:beacon" -> 1;
+            case "minecraft:dispenser", "minecraft:dropper" -> 9;
+            case "minecraft:enchanting_table" -> 2;
+            case "minecraft:crafting_table" -> 10;
+            case "minecraft:hopper" -> slotCount;
+            case "EntityHorse" -> slotCount > 2 ? 17 : 2;
+            default -> slotCount / 9 * 9;
+        };
+    }
 
-		Item[] items = user.get(WindowTracker.class).getBrewingItems(windowId);
-		for (int i = 0; i < items.length; i++) {
-			PacketWrapper setSlot = PacketWrapper.create(ClientboundPackets1_8.CONTAINER_SET_SLOT, user);
-			setSlot.write(Types.BYTE, (byte) windowId);
-			setSlot.write(Types.SHORT, (short) i);
-			setSlot.write(Types.ITEM1_8, items[i]);
-			setSlot.scheduleSend(Protocol1_9To1_8.class);
-		}
-	}
+    public short openWindowId() {
+        return openWindowId;
+    }
+
+    public int openWindowSize() {
+        return openWindowSize;
+    }
+
+    public Item[] getBrewingItems(short windowId) {
+        return brewingItems.computeIfAbsent(windowId, key -> new Item[]{
+            new DataItem(),
+            new DataItem(),
+            new DataItem(),
+            new DataItem()
+        });
+    }
+
+    public short getEnchantmentValue(final short key) {
+        if (!enchantmentProperties.containsKey(key)) {
+            return 0;
+        }
+        return enchantmentProperties.remove(key);
+    }
+
+    public void putEnchantmentProperty(short key, short value) {
+        enchantmentProperties.put(key, value);
+    }
+
+    public void clearEnchantmentProperties() {
+        enchantmentProperties.clear();
+    }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_9to1_8/task/CooldownIndicatorTask.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -23,10 +23,14 @@ import com.viaversion.viaversion.api.connection.UserConnection;
 
 public class CooldownIndicatorTask implements Runnable {
 
-	@Override
-	public void run() {
-		for (UserConnection connection : Via.getManager().getConnectionManager().getConnections()) {
-			connection.get(CooldownStorage.class).tick(connection);
-		}
-	}
+    @Override
+    public void run() {
+        for (UserConnection connection : Via.getManager().getConnectionManager().getConnections()) {
+            final CooldownStorage cooldown = connection.get(CooldownStorage.class);
+            if (cooldown == null) {
+                continue;
+            }
+            cooldown.tick(connection);
+        }
+    }
 }

common/src/main/java/com/viaversion/viarewind/protocol/v1_9to1_8/task/LevitationUpdateTask.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -25,32 +25,34 @@ import com.viaversion.viaversion.api.connection.UserConnection;
 import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
 import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ClientboundPackets1_8;
-
 import java.util.logging.Level;
 
 public class LevitationUpdateTask implements Runnable {
 
-	@Override
-	public void run() {
-		if (!ViaRewind.getConfig().emulateLevitationEffect()) {
-			return;
-		}
-		for (UserConnection connection : Via.getManager().getConnectionManager().getConnections()) {
-			final LevitationStorage levitation = connection.get(LevitationStorage.class);
-			if (!levitation.isActive()) {
-				continue;
-			}
+    @Override
+    public void run() {
+        if (!ViaRewind.getConfig().emulateLevitationEffect()) {
+            return;
+        }
+        for (UserConnection connection : Via.getManager().getConnectionManager().getConnections()) {
+            final LevitationStorage levitation = connection.get(LevitationStorage.class);
+            if (levitation == null) {
+                continue;
+            }
+            if (!levitation.isActive()) {
+                continue;
+            }
 
-			final PacketWrapper velocityPacket = PacketWrapper.create(ClientboundPackets1_8.SET_ENTITY_MOTION, connection);
-			velocityPacket.write(Types.VAR_INT, connection.getEntityTracker(Protocol1_9To1_8.class).clientEntityId());
-			velocityPacket.write(Types.SHORT, (short) 0);
-			velocityPacket.write(Types.SHORT, (short) ((levitation.getAmplifier() + 1) * 360));
-			velocityPacket.write(Types.SHORT, (short) 0);
-			try {
-				velocityPacket.scheduleSend(Protocol1_9To1_8.class);
-			} catch (Exception e) {
-				ViaRewind.getPlatform().getLogger().log(Level.SEVERE, "Failed to send levitation packet", e);
-			}
-		}
-	}
+            final PacketWrapper velocityPacket = PacketWrapper.create(ClientboundPackets1_8.SET_ENTITY_MOTION, connection);
+            velocityPacket.write(Types.VAR_INT, connection.storables(Protocol1_9To1_8.class).entityTracker().clientEntityId());
+            velocityPacket.write(Types.SHORT, (short) 0);
+            velocityPacket.write(Types.SHORT, (short) ((levitation.getAmplifier() + 1) * 360));
+            velocityPacket.write(Types.SHORT, (short) 0);
+            try {
+                velocityPacket.scheduleSend(Protocol1_9To1_8.class);
+            } catch (Exception e) {
+                ViaRewind.getPlatform().getLogger().log(Level.SEVERE, "Failed to send levitation packet", e);
+            }
+        }
+    }
 }

common/src/main/java/com/viaversion/viarewind/utils/ChatUtil.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind
- * Copyright (C) 2018-2025 ViaVersion and contributors
+ * Copyright (C) 2018-2026 ViaVersion and contributors
  *
  * 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
@@ -26,72 +26,74 @@ import com.viaversion.viaversion.libs.gson.JsonParser;
 import com.viaversion.viaversion.protocols.v1_12_2to1_13.Protocol1_12_2To1_13;
 import com.viaversion.viaversion.rewriter.text.JsonNBTComponentRewriter;
 import com.viaversion.viaversion.util.ComponentUtil;
-
 import java.util.logging.Level;
 import java.util.regex.Pattern;
 
 @Deprecated
 public class ChatUtil {
-	private static final Pattern UNUSED_COLOR_PATTERN = Pattern.compile("(?>(?>§[0-fk-or])*(§r|\\Z))|(?>(?>§[0-f])*(§[0-f]))");
-	private static final JsonNBTComponentRewriter<ClientboundPacketType> LEGACY_REWRITER = new JsonNBTComponentRewriter<>(null, JsonNBTComponentRewriter.ReadType.JSON) {
-		@Override
-		protected void handleTranslate(JsonObject object, String translate) {
-			String text = Protocol1_12_2To1_13.MAPPINGS.getMojangTranslation().get(translate);
-			if (text != null) {
-				object.addProperty("translate", text);
-			}
-		}
-	};
+    private static final Pattern UNUSED_COLOR_PATTERN = Pattern.compile("(?>(?>§[0-fk-or])*(§r|\\Z))|(?>(?>§[0-f])*(§[0-f]))");
+    private static final JsonNBTComponentRewriter<ClientboundPacketType> LEGACY_REWRITER = new JsonNBTComponentRewriter<>(null, JsonNBTComponentRewriter.ReadType.JSON) {
+        @Override
+        protected void handleTranslate(JsonObject object, String translate) {
+            String text = Protocol1_12_2To1_13.MAPPINGS.getMojangTranslation().get(translate);
+            if (text != null) {
+                object.addProperty("translate", text);
+            }
+        }
+    };
 
-	public static String jsonToLegacy(String json) {
-		if (json == null || json.equals("null") || json.isEmpty()) {
-			return "";
-		}
-		try {
-			return jsonToLegacy(JsonParser.parseString(json));
-		} catch (Exception e) {
-			if (!Via.getConfig().isSuppressConversionWarnings()) {
-				ViaRewind.getPlatform().getLogger().log(Level.WARNING, "Could not convert component to legacy text: " + json, e);
-			}
-		}
-		return "";
-	}
+    public static String jsonToLegacy(String json) {
+        if (json == null || json.equals("null") || json.isEmpty()) {
+            return "";
+        }
+        try {
+            return jsonToLegacy(JsonParser.parseString(json));
+        } catch (Exception e) {
+            if (Via.getConfig().logTextComponentConversionErrors()) {
+                ViaRewind.getPlatform().getLogger().log(Level.WARNING, "Could not convert component to legacy text: " + json, e);
+            }
+        }
+        return "";
+    }
 
-	public static String jsonToLegacy(JsonElement component) {
-		if (component.isJsonNull() || component.isJsonArray() && component.getAsJsonArray().isEmpty() || component.isJsonObject() && component.getAsJsonObject().isEmpty()) {
-			return "";
-		} else if (component.isJsonPrimitive()) {
-			return component.getAsString();
-		} else {
-			try {
-				LEGACY_REWRITER.processText(null, component);
-				String legacy = ComponentUtil.jsonToLegacy(component);
-				while (legacy.startsWith("§f")) legacy = legacy.substring(2);
-				return legacy;
-			} catch (Exception ex) {
-				if (!Via.getConfig().isSuppressConversionWarnings()) {
-					ViaRewind.getPlatform().getLogger().log(Level.WARNING, "Could not convert component to legacy text: " + component, ex);
-				}
-			}
-			return "";
-		}
-	}
+    public static String jsonToLegacy(JsonElement component) {
+        if (component.isJsonNull() || component.isJsonArray() && component.getAsJsonArray().isEmpty() || component.isJsonObject() && component.getAsJsonObject().isEmpty()) {
+            return "";
+        } else if (component.isJsonPrimitive()) {
+            return component.getAsString();
+        } else {
+            try {
+                LEGACY_REWRITER.processText(null, component);
+                String legacy = ComponentUtil.jsonToLegacy(component);
+                int attempts = 0;
+                while (legacy.startsWith("§f") && attempts++ < 10) {
+                    legacy = legacy.substring(2);
+                }
+                return legacy;
+            } catch (Exception ex) {
+                if (Via.getConfig().logTextComponentConversionErrors()) {
+                    ViaRewind.getPlatform().getLogger().log(Level.WARNING, "Could not convert component to legacy text: " + component, ex);
+                }
+            }
+            return "";
+        }
+    }
 
-	public static String removeUnusedColor(String legacy, char last) {
-		if (legacy == null) return null;
-		legacy = UNUSED_COLOR_PATTERN.matcher(legacy).replaceAll("$1$2");
-		StringBuilder builder = new StringBuilder();
-		for (int i = 0; i < legacy.length(); i++) {
-			char current = legacy.charAt(i);
-			if (current != '§' || i == legacy.length() - 1) {
-				builder.append(current);
-				continue;
-			}
-			current = legacy.charAt(++i);
-			if (current == last) continue;
-			builder.append('§').append(current);
-			last = current;
-		}
-		return builder.toString();
-	}
+    public static String removeUnusedColor(String legacy, char last) {
+        if (legacy == null) return null;
+        legacy = UNUSED_COLOR_PATTERN.matcher(legacy).replaceAll("$1$2");
+        StringBuilder builder = new StringBuilder();
+        for (int i = 0; i < legacy.length(); i++) {
+            char current = legacy.charAt(i);
+            if (current != '§' || i == legacy.length() - 1) {
+                builder.append(current);
+                continue;
+            }
+            current = legacy.charAt(++i);
+            if (current == last) continue;
+            builder.append('§').append(current);
+            last = current;
+        }
+        return builder.toString();
+    }
 }

common/src/main/resources/assets/viarewind/data/item-mappings-1.8.json

@@ -126,6 +126,7 @@
     },
     "180": {
       "id": "128",
+      "data": "-1",
       "name": "1.8 Red Sandstone Stairs"
     },
     "181": {