chore(release): bump version to 2.1.53 (#646)

* Remove adventure platform dependencies

Removed adventure-platform-bukkit and adventure-platform-bungee dependencies.

* fix(bungee): remove adventure-platform to prevent Adventure 4.x/5.x class conflict

* fix(bukkit): restore missing adventure-platform-bukkit catalog entry

* Remove adventure-platform-bukkit dependency

Removed adventure-platform-bukkit dependency from libs.versions.toml

* Readd adventure-platform-bukkit dependency

* Update copyright year and refactor action bar method

Updated copyright year from 2025 to 2026 and refactored action bar message sending as commented by @jonesdevelopment

* Refactor title code as commented

* I forgot a closing bracket :(

* Change LibraryLoader to public class with state management

Refactor LibraryLoader to a public class and add loaded state management.

* Update copyright year and load libraries earlier

* Add imports for BungeeLibraryManager and SonarPlatform

* Avoid double library loading without tracking state

* Invert BungeeAudience#showTitle player check

* Now makes use of Java 17+ features

* Avoid storing extra 1.16 protocol version ID

---------

Co-authored-by: Jones <admin@jonesdev.xyz>

.github/README.md

@@ -47,7 +47,7 @@ Sonar analyzes a player's behavior before joining the actual server, therefore s
 1. Sonar sends the player to a lightweight fake server when they connect for the first time.
 2. Sonar verifies that players obey the laws of Minecraft's physics, including gravity and proper block collision.
 3. Sonar verifies that players send legitimate packets when interacting with vehicles (e.g. boats).
-4. Sonar makes sure that players send legitimate packets according to the [vanilla Minecraft protocol](<https://wiki.vg/Protocol>).
+4. Sonar makes sure that players send legitimate packets according to the [vanilla Minecraft protocol](<https://minecraft.wiki/w/Java_Edition_protocol/>).
 
 Sonar also protects against spambot attacks since it queues the incoming connections, therefore making it technically impossible to have a ton of bots join the server at the same time.
 

api/src/main/java/xyz/jonesdev/sonar/api/antibot/protocol/ProtocolVersion.java

@@ -77,7 +77,8 @@ public enum ProtocolVersion {
   MINECRAFT_1_21_9(773, "1.21.9"),
   MINECRAFT_1_21_11(774, "1.21.11"),
   MINECRAFT_26_1(775, "26.1"),
-  MINECRAFT_26_2(776, "26.2");
+  MINECRAFT_26_2(776, "26.2"),
+  MINECRAFT_26_3(777, "26.3");
 
   private final int protocol;
   private final String name;

bukkit/src/main/java/xyz/jonesdev/sonar/bukkit/antibot/BukkitServerVersion.java

@@ -83,7 +83,8 @@ public enum BukkitServerVersion {
   MINECRAFT_1_21_10,
   MINECRAFT_1_21_11,
   MINECRAFT_26_1,
-  MINECRAFT_26_2;
+  MINECRAFT_26_2,
+  MINECRAFT_26_3;
 
   static final BukkitServerVersion[] REVERSED_VALUES;
 

bungeecord/build.gradle.kts

@@ -15,9 +15,6 @@ dependencies {
 
   compileOnly(rootProject.libs.bungeecord)
 
-  implementation(rootProject.libs.adventure.platform.bungee) {
-    exclude(module = "adventure-nbt")
-  }
   implementation(rootProject.libs.bstats.bungee)
   implementation(rootProject.libs.libby.bungee)
 }

bungeecord/src/main/java/xyz/jonesdev/sonar/bungee/BungeeAudience.java

@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2026 Sonar 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 <https://www.gnu.org/licenses/>.
+ */
+
+package xyz.jonesdev.sonar.bungee;
+
+import net.kyori.adventure.audience.Audience;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.serializer.gson.GsonComponentSerializer;
+import net.kyori.adventure.title.Title;
+import net.md_5.bungee.api.ChatMessageType;
+import net.md_5.bungee.api.CommandSender;
+import net.md_5.bungee.api.ProxyServer;
+import net.md_5.bungee.api.chat.BaseComponent;
+import net.md_5.bungee.api.connection.ProxiedPlayer;
+import net.md_5.bungee.chat.ComponentSerializer;
+import org.jetbrains.annotations.NotNull;
+import xyz.jonesdev.sonar.api.antibot.protocol.ProtocolVersion;
+
+import java.time.Duration;
+
+/**
+ * Minimal {@link Audience} implementation backed by the native BungeeCord chat API.
+ * <br>
+ * BungeeCord does not ship Adventure, so we used to bundle adventure-platform-bungeecord (Adventure 4.x).
+ * That conflicted with the Adventure 5.x libraries Sonar loads at runtime, because both end up
+ * in the same relocated package. Converting components to JSON and passing them to BungeeCord's own
+ * {@link ComponentSerializer} allows us to depend on exactly one Adventure version.
+ */
+final class BungeeAudience implements Audience {
+  private final CommandSender sender;
+
+  BungeeAudience(final @NotNull CommandSender sender) {
+    this.sender = sender;
+  }
+
+  @Override
+  public void sendMessage(final @NotNull Component message) {
+    sender.sendMessage(toBungee(message));
+  }
+
+  @Override
+  public void sendActionBar(final @NotNull Component message) {
+    // Only players have an action bar
+    if (sender instanceof ProxiedPlayer player) {
+      player.sendMessage(ChatMessageType.ACTION_BAR, toBungee(message));
+    }
+  }
+
+  @Override
+  public void showTitle(final @NotNull Title title) {
+    // Only players can see titles
+    if (sender instanceof ProxiedPlayer player) {
+      final Title.Times times = title.times();
+      ProxyServer.getInstance().createTitle()
+        .title(toBungee(title.title()))
+        .subTitle(toBungee(title.subtitle()))
+        // Use the same defaults as Title#DEFAULT_TIMES (0.5s, 3.5s, 1s)
+        .fadeIn(times == null ? 10 : toTicks(times.fadeIn()))
+        .stay(times == null ? 70 : toTicks(times.stay()))
+        .fadeOut(times == null ? 20 : toTicks(times.fadeOut()))
+        .send(player);
+    }
+  }
+
+  private static int toTicks(final @NotNull Duration duration) {
+    return (int) (duration.toMillis() / 50L);
+  }
+
+  private @NotNull BaseComponent[] toBungee(final @NotNull Component component) {
+    // Downsample hex colors for clients that do not support them
+    final boolean legacyClient = sender instanceof ProxiedPlayer player
+      && player.getPendingConnection().getVersion() < ProtocolVersion.MINECRAFT_1_16.getProtocol();
+    final GsonComponentSerializer serializer = legacyClient
+      ? GsonComponentSerializer.colorDownsamplingGson()
+      : GsonComponentSerializer.gson();
+    return ComponentSerializer.parse(serializer.serialize(component));
+  }
+}

bungeecord/src/main/java/xyz/jonesdev/sonar/bungee/SonarBungee.java

@@ -20,8 +20,8 @@ package xyz.jonesdev.sonar.bungee;
 import com.alessiodp.libby.BungeeLibraryManager;
 import lombok.Getter;
 import net.kyori.adventure.audience.Audience;
-import net.kyori.adventure.platform.bungeecord.BungeeAudiences;
 import net.md_5.bungee.api.CommandSender;
+import net.md_5.bungee.api.connection.ProxiedPlayer;
 import org.bstats.bungeecord.Metrics;
 import org.bstats.charts.SimplePie;
 import org.jetbrains.annotations.NotNull;
@@ -36,26 +36,22 @@ import java.util.UUID;
 
 @Getter
 public final class SonarBungee extends SonarBootstrap<SonarBungeePlugin> {
-  public SonarBungee(final @NotNull SonarBungeePlugin plugin) {
-    super(plugin, SonarPlatform.BUNGEE, plugin.getDataFolder(), new BungeeLibraryManager(plugin));
+  public SonarBungee(final @NotNull SonarBungeePlugin plugin, final @NotNull BungeeLibraryManager libraryManager) {
+    super(plugin, SonarPlatform.BUNGEE, plugin.getDataFolder(), libraryManager);
   }
 
-  /**
-   * Wrapper for BungeeCord audiences
-   */
-  private final BungeeAudiences bungeeAudiences = BungeeAudiences.create(getPlugin());
-
   @Override
   public @Nullable Audience audience(final @Nullable UUID uniqueId) {
     if (uniqueId == null) {
       return null;
     }
-    return bungeeAudiences.player(uniqueId);
+    final ProxiedPlayer player = getPlugin().getServer().getPlayer(uniqueId);
+    return player == null ? null : new BungeeAudience(player);
   }
 
   @Override
   public @NotNull Audience sender(final @NotNull Object object) {
-    return bungeeAudiences.sender((CommandSender) object);
+    return new BungeeAudience((CommandSender) object);
   }
 
   /**

bungeecord/src/main/java/xyz/jonesdev/sonar/bungee/SonarBungeePlugin.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2025 Sonar Contributors
+ * Copyright (C) 2026 Sonar 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
@@ -17,9 +17,12 @@
 
 package xyz.jonesdev.sonar.bungee;
 
+import com.alessiodp.libby.BungeeLibraryManager;
 import lombok.Getter;
 import net.md_5.bungee.api.ProxyServer;
 import net.md_5.bungee.api.plugin.Plugin;
+import xyz.jonesdev.sonar.api.SonarPlatform;
+import xyz.jonesdev.sonar.common.boot.LibraryLoader;
 
 @Getter
 public final class SonarBungeePlugin extends Plugin {
@@ -30,7 +33,13 @@ public final class SonarBungeePlugin extends Plugin {
   public void onEnable() {
     server = ProxyServer.getInstance();
 
-    bootstrap = new SonarBungee(this);
+    // HACK:
+    // Adventure is not bundled in the jar, so the libraries have to be on the classpath
+    // before SonarBungee is loaded. The JVM resolves its Adventure types during class verification.
+    final BungeeLibraryManager libraryManager = new BungeeLibraryManager(this);
+    LibraryLoader.loadLibraries(libraryManager, SonarPlatform.BUNGEE);
+
+    bootstrap = new SonarBungee(this, libraryManager);
     bootstrap.initialize();
   }
 

captcha/src/main/java/xyz/jonesdev/sonar/captcha/StandardCaptchaGenerator.java

@@ -54,13 +54,13 @@ public final class StandardCaptchaGenerator implements CaptchaGenerator {
   static {
     FONT = TTFFontProvider.loadFont("/assets/fonts/Kingthings_Trypewriter_2.ttf");
 
-    FBM.setAmount(0.6f);
-    FBM.setScale(15);
+    FBM.setAmount(0.55f + RANDOM.nextFloat(0.15f));
+    FBM.setScale(10 + RANDOM.nextFloat(10));
 
     SMEAR.setShape(SmearFilter.SQUARES);
     SMEAR.setDensity(0.1f);
     SMEAR.setDistance(0);
-    SMEAR.setMix(0.35f);
+    SMEAR.setMix(0.25f + RANDOM.nextFloat(0.25f));
 
     // Create fractions based on the number of colors
     for (int i = 0; i < COLOR_FRACTIONS.length; i++) {
@@ -111,7 +111,7 @@ public final class StandardCaptchaGenerator implements CaptchaGenerator {
   private void applyRandomColorGradient(final @NotNull Graphics2D graphics) {
     // Randomize the colors for the gradient effect
     for (int i = 0; i < COLORS.length; i++) {
-      final float random = 0.9f + RANDOM.nextFloat() * 0.1f;
+      final float random = 0.8f + RANDOM.nextFloat() * 0.2f;
       COLORS[i] = Color.getHSBColor(RANDOM.nextFloat(), random * 0.8f, random);
     }
 
@@ -161,8 +161,8 @@ public final class StandardCaptchaGenerator implements CaptchaGenerator {
   }
 
   private void createGlyphOutline(final @NotNull Graphics2D graphics, final @NotNull Shape shape) {
-    final float txy = 1.25f + RANDOM.nextFloat();
-    final float width = 1 + RANDOM.nextFloat();
+    final float txy = RANDOM.nextFloat(0.1f, 2f);
+    final float width = RANDOM.nextFloat(0.5f, 2f);
 
     // Create a randomly translated and stroked shape based on the original glyph shape
     final AffineTransform translation = AffineTransform.getTranslateInstance(txy, txy);

captcha/src/test/java/Main.java

@@ -17,7 +17,7 @@
 
 import lombok.experimental.UtilityClass;
 import xyz.jonesdev.sonar.api.antibot.captcha.CaptchaGenerator;
-import xyz.jonesdev.sonar.captcha.complex.ComplexCaptchaGenerator;
+import xyz.jonesdev.sonar.captcha.StandardCaptchaGenerator;
 
 import javax.imageio.ImageIO;
 import java.awt.image.BufferedImage;
@@ -29,7 +29,7 @@ import java.util.Random;
 public class Main {
   public void main(final String... args) throws IOException {
     final Random random = new Random();
-    final CaptchaGenerator standardCaptchaGenerator = new ComplexCaptchaGenerator(null);
+    final CaptchaGenerator standardCaptchaGenerator = new StandardCaptchaGenerator(null);
 
     final long start = System.currentTimeMillis();
     final char[] dictionary = {'a', 'b', 'c', 'd', 'e', 'f'/*, 'g'*/, 'h'/*, 'i'*/, 'j',

common/src/main/java/xyz/jonesdev/sonar/common/boot/LibraryLoader.java

@@ -24,8 +24,8 @@ import org.jetbrains.annotations.NotNull;
 import xyz.jonesdev.sonar.api.SonarPlatform;
 
 @UtilityClass
-class LibraryLoader {
-  void loadLibraries(final @NotNull LibraryManager libraryManager, final @NotNull SonarPlatform platform) {
+public class LibraryLoader {
+  public void loadLibraries(final @NotNull LibraryManager libraryManager, final @NotNull SonarPlatform platform) {
     libraryManager.addMavenCentral();
     libraryManager.addJitPack();
     libraryManager.loadLibraries(
@@ -69,25 +69,14 @@ class LibraryLoader {
     // Only load adventure if not on Velocity
     if (platform != SonarPlatform.VELOCITY) {
       if (platform != SonarPlatform.PAPER) {
+        // BungeeCord does not ship Adventure, and we do not bundle adventure-platform there anymore
+        // (mixing Adventure 4.x and 5.x in the same relocated package causes NoSuchMethodErrors).
+        // Therefore, adventure-api and everything else Adventure needs has to be resolved at runtime.
+        final boolean resolveTransitive = platform == SonarPlatform.BUNGEE;
         libraryManager.loadLibraries(
-          Library.builder()
-            .groupId("net{}kyori")
-            .artifactId("adventure-text-minimessage")
-            .version("4.21.0")
-            .relocate("net{}kyori", "xyz{}jonesdev{}sonar{}libs{}kyori")
-            .build(),
-          Library.builder()
-            .groupId("net{}kyori")
-            .artifactId("adventure-text-serializer-gson")
-            .version("4.21.0")
-            .relocate("net{}kyori", "xyz{}jonesdev{}sonar{}libs{}kyori")
-            .build(),
-          Library.builder()
-            .groupId("net{}kyori")
-            .artifactId("adventure-nbt")
-            .version("4.21.0")
-            .relocate("net{}kyori", "xyz{}jonesdev{}sonar{}libs{}kyori")
-            .build()
+          adventureLibrary("adventure-text-minimessage", resolveTransitive),
+          adventureLibrary("adventure-text-serializer-gson", resolveTransitive),
+          adventureLibrary("adventure-nbt", resolveTransitive)
         );
       } else {
         // On Paper, we only relocate the nbt package since the rest of adventure is bundled with the server.
@@ -95,11 +84,25 @@ class LibraryLoader {
           Library.builder()
             .groupId("net{}kyori")
             .artifactId("adventure-nbt")
-            .version("4.21.0")
+            .version("5.2.0")
             .relocate("net{}kyori{}adventure{}nbt", "xyz{}jonesdev{}sonar{}libs{}kyori{}adventure{}nbt")
             .build()
         );
       }
     }
   }
+
+  private @NotNull Library adventureLibrary(final @NotNull String artifactId, final boolean resolveTransitive) {
+    final Library.Builder builder = Library.builder()
+      .groupId("net{}kyori")
+      .artifactId(artifactId)
+      .version("5.2.0")
+      .relocate("net{}kyori", "xyz{}jonesdev{}sonar{}libs{}kyori");
+    if (resolveTransitive) {
+      builder.resolveTransitiveDependencies(true)
+        // Gson is already provided by the proxy, so we must not load another copy
+        .excludeTransitiveDependency("com.google.code.gson", "gson");
+    }
+    return builder.build();
+  }
 }

common/src/main/java/xyz/jonesdev/sonar/common/boot/SonarBootstrap.java

@@ -68,7 +68,13 @@ public abstract class SonarBootstrap<T> implements Sonar {
                         final @NotNull File dataDirectory,
                         final @NotNull LibraryManager libraryManager) {
     // Load all libraries before anything else
-    LibraryLoader.loadLibraries(libraryManager, platform);
+    // HACK:
+    // We manually load the libraries on BungeeCord beforehand,
+    // so we skip this call to avoid loading libraries twice.
+    // See SonarBungeePlugin.java#L40
+    if (platform != SonarPlatform.BUNGEE) {
+      LibraryLoader.loadLibraries(libraryManager, platform);
+    }
     this.libraryManager = libraryManager;
     // Check if Netty is up to date
     ProtocolUtil.checkNettyVersion();

common/src/main/java/xyz/jonesdev/sonar/common/netty/TailExceptionsHandler.java

@@ -21,6 +21,7 @@ import io.netty.channel.ChannelDuplexHandler;
 import io.netty.channel.ChannelHandler;
 import io.netty.channel.ChannelHandlerContext;
 import org.jetbrains.annotations.NotNull;
+import xyz.jonesdev.sonar.common.util.ProtocolUtil;
 
 @ChannelHandler.Sharable
 public final class TailExceptionsHandler extends ChannelDuplexHandler {
@@ -33,6 +34,20 @@ public final class TailExceptionsHandler extends ChannelDuplexHandler {
   // Additionally, this will also run after our custom decoder.
   @Override
   public void exceptionCaught(final @NotNull ChannelHandlerContext ctx, final Throwable cause) throws Exception {
+    // If ProtocolUtil#closeWith(...) already queued a graceful write-then-close for
+    // this channel (e.g. VerificationHandler#fail() calls disconnect() and then
+    // throws to unwind), don't race it with a second, immediate close() here. Doing
+    // so can abort the still-in-flight kick/disconnect packet write before it's fully
+    // flushed, so the client only receives a truncated packet instead of our message.
+    // The scheduled close from closeWith() will still run once the write completes.
+    // See: https://github.com/jonesdevelopment/sonar/issues/476
+    if (Boolean.TRUE.equals(ctx.channel().attr(ProtocolUtil.CLOSING).get())) {
+      if (LOG_EXCEPTIONS) {
+        cause.printStackTrace(System.err);
+      }
+      return;
+    }
+
     // Close the channel if we encounter any errors.
     ctx.close();
     if (LOG_EXCEPTIONS) {

common/src/main/java/xyz/jonesdev/sonar/common/protocol/SonarPacketPreparer.java

@@ -106,8 +106,10 @@ public class SonarPacketPreparer {
   public final SonarPacket[] REGISTRY_SYNC_1_21_11 = RegistryDataPacket.of(DimensionRegistry.CODEC_1_21_11);
   public final SonarPacket[] REGISTRY_SYNC_26_1 = RegistryDataPacket.of(DimensionRegistry.CODEC_26_1);
   public final SonarPacket[] REGISTRY_SYNC_26_2 = RegistryDataPacket.of(DimensionRegistry.CODEC_26_2);
+  public final SonarPacket[] REGISTRY_SYNC_26_3 = RegistryDataPacket.of(DimensionRegistry.CODEC_26_3);
   public final SonarPacket TAGS_UPDATE_26_1 = UpdateTagsPacket.of(DimensionRegistry.TAGS_26_1);
   public final SonarPacket TAGS_UPDATE_26_2 = UpdateTagsPacket.of(DimensionRegistry.TAGS_26_2);
+  public final SonarPacket TAGS_UPDATE_26_3 = UpdateTagsPacket.of(DimensionRegistry.TAGS_26_3);
   public final SonarPacket START_WRITING_CHUNKS = new GameEventPacket(13, 0);
   public final static SonarPacket INVALID_HELD_ITEM_SLOT = new SetHeldItemPacket(-1);
   public final SonarPacket RANDOM_KEEP_ALIVE = new SonarPacketSnapshot(new KeepAlivePacket(RANDOM.nextInt()));
@@ -296,7 +298,9 @@ public class SonarPacketPreparer {
   }
 
   public static @Nullable SonarPacket getTagsPacket(final @NotNull ProtocolVersion protocolVersion) {
-    if (protocolVersion.greaterThanOrEquals(ProtocolVersion.MINECRAFT_26_2)) {
+    if (protocolVersion.greaterThanOrEquals(ProtocolVersion.MINECRAFT_26_3)) {
+      return TAGS_UPDATE_26_3;
+    } else if (protocolVersion.greaterThanOrEquals(ProtocolVersion.MINECRAFT_26_2)) {
       return TAGS_UPDATE_26_2;
     } else if (protocolVersion.greaterThanOrEquals(ProtocolVersion.MINECRAFT_26_1)) {
       return TAGS_UPDATE_26_1;
@@ -305,7 +309,9 @@ public class SonarPacketPreparer {
   }
 
   public static SonarPacket[] getRegistryPackets(final @NotNull ProtocolVersion protocolVersion) {
-    if (protocolVersion.greaterThanOrEquals(ProtocolVersion.MINECRAFT_26_2)) {
+    if (protocolVersion.greaterThanOrEquals(ProtocolVersion.MINECRAFT_26_3)) {
+      return REGISTRY_SYNC_26_3;
+    } else if (protocolVersion.greaterThanOrEquals(ProtocolVersion.MINECRAFT_26_2)) {
       return REGISTRY_SYNC_26_2;
     } else if (protocolVersion.greaterThanOrEquals(ProtocolVersion.MINECRAFT_26_1)) {
       return REGISTRY_SYNC_26_1;

common/src/main/java/xyz/jonesdev/sonar/common/protocol/SonarPacketRegistry.java

@@ -77,7 +77,8 @@ public enum SonarPacketRegistry {
         map(0x05, MINECRAFT_1_20_2, true),
         map(0x07, MINECRAFT_1_20_5, true));
       clientbound.register(UpdateTagsPacket.class, UpdateTagsPacket::new,
-        map(0x0D, MINECRAFT_1_20_5, true));
+        map(0x0D, MINECRAFT_1_20_5, true),
+        map(0x0E, MINECRAFT_26_3, true));
 
       serverbound.register(ClientInformationPacket.class, ClientInformationPacket::new,
         map(0x00, MINECRAFT_1_20_2, false));
@@ -113,7 +114,8 @@ public enum SonarPacketRegistry {
         map(0x2C, MINECRAFT_1_21_2, true),
         map(0x2B, MINECRAFT_1_21_5, true),
         map(0x30, MINECRAFT_1_21_9, true),
-        map(0x31, MINECRAFT_26_1, true));
+        map(0x31, MINECRAFT_26_1, true),
+        map(0x32, MINECRAFT_26_3, true));
       // minecraft:keep_alive
       clientbound.register(KeepAlivePacket.class, KeepAlivePacket::new,
         map(0x00, MINECRAFT_1_7_2, true),
@@ -133,7 +135,8 @@ public enum SonarPacketRegistry {
         map(0x27, MINECRAFT_1_21_2, true),
         map(0x26, MINECRAFT_1_21_5, true),
         map(0x2B, MINECRAFT_1_21_9, true),
-        map(0x2C, MINECRAFT_26_1, true));
+        map(0x2C, MINECRAFT_26_1, true),
+        map(0x2D, MINECRAFT_26_3, true));
       // minecraft:disconnect
       clientbound.register(DisconnectPacket.class, DisconnectPacket::new,
         map(0x40, MINECRAFT_1_7_2, true),
@@ -172,7 +175,8 @@ public enum SonarPacketRegistry {
         map(0x42, MINECRAFT_1_21_2, true),
         map(0x41, MINECRAFT_1_21_5, true),
         map(0x46, MINECRAFT_1_21_9, true),
-        map(0x48, MINECRAFT_26_1, true));
+        map(0x48, MINECRAFT_26_1, true),
+        map(0x49, MINECRAFT_26_3, true));
       // minecraft:player_abilities
       clientbound.register(PlayerAbilitiesPacket.class, PlayerAbilitiesPacket::new,
         map(0x39, MINECRAFT_1_7_2, true),
@@ -193,7 +197,8 @@ public enum SonarPacketRegistry {
         map(0x3A, MINECRAFT_1_21_2, true),
         map(0x39, MINECRAFT_1_21_5, true),
         map(0x3E, MINECRAFT_1_21_9, true),
-        map(0x40, MINECRAFT_26_1, true));
+        map(0x40, MINECRAFT_26_1, true),
+        map(0x41, MINECRAFT_26_3, true));
       // minecraft:level_chunk_with_light
       clientbound.register(ChunkDataPacket.class, ChunkDataPacket::new,
         map(0x21, MINECRAFT_1_7_2, true),
@@ -213,7 +218,8 @@ public enum SonarPacketRegistry {
         map(0x28, MINECRAFT_1_21_2, true),
         map(0x27, MINECRAFT_1_21_5, true),
         map(0x2C, MINECRAFT_1_21_9, true),
-        map(0x2D, MINECRAFT_26_1, true));
+        map(0x2D, MINECRAFT_26_1, true),
+        map(0x2E, MINECRAFT_26_3, true));
       // minecraft:remove_entities
       clientbound.register(RemoveEntitiesPacket.class, RemoveEntitiesPacket::new,
         map(0x13, MINECRAFT_1_7_2, true),
@@ -236,7 +242,8 @@ public enum SonarPacketRegistry {
         map(0x47, MINECRAFT_1_21_2, true),
         map(0x46, MINECRAFT_1_21_5, true),
         map(0x4B, MINECRAFT_1_21_9, true),
-        map(0x4D, MINECRAFT_26_1, true));
+        map(0x4D, MINECRAFT_26_1, true),
+        map(0x4E, MINECRAFT_26_3, true));
       // minecraft:set_passengers
       clientbound.register(SetPassengersPacket.class, SetPassengersPacket::new,
         map(0x1B, MINECRAFT_1_7_2, true),
@@ -256,7 +263,8 @@ public enum SonarPacketRegistry {
         map(0x65, MINECRAFT_1_21_2, true),
         map(0x64, MINECRAFT_1_21_5, true),
         map(0x69, MINECRAFT_1_21_9, true),
-        map(0x6B, MINECRAFT_26_1, true));
+        map(0x6B, MINECRAFT_26_1, true),
+        map(0x6D, MINECRAFT_26_3, true));
       // minecraft:add_entity
       clientbound.register(SpawnEntityPacket.class, SpawnEntityPacket::new,
         map(0x0E, MINECRAFT_1_7_2, true),
@@ -281,7 +289,8 @@ public enum SonarPacketRegistry {
         map(0x4E, MINECRAFT_1_21_2, true),
         map(0x4D, MINECRAFT_1_21_5, true),
         map(0x52, MINECRAFT_1_21_9, true),
-        map(0x54, MINECRAFT_26_1, true));
+        map(0x54, MINECRAFT_26_1, true),
+        map(0x56, MINECRAFT_26_3, true));
       // minecraft:ping
       clientbound.register(TransactionPacket.class, TransactionPacket::new,
         map(0x32, MINECRAFT_1_7_2, true),
@@ -300,7 +309,8 @@ public enum SonarPacketRegistry {
         map(0x37, MINECRAFT_1_21_2, true),
         map(0x36, MINECRAFT_1_21_5, true),
         map(0x3B, MINECRAFT_1_21_9, true),
-        map(0x3D, MINECRAFT_26_1, true));
+        map(0x3D, MINECRAFT_26_1, true),
+        map(0x3E, MINECRAFT_26_3, true));
       // minecraft:set_default_spawn_position
       clientbound.register(SetDefaultSpawnPositionPacket.class, SetDefaultSpawnPositionPacket::new,
         map(0x05, MINECRAFT_1_7_2, true),
@@ -322,7 +332,8 @@ public enum SonarPacketRegistry {
         map(0x5B, MINECRAFT_1_21_2, true),
         map(0x5A, MINECRAFT_1_21_5, true),
         map(0x5F, MINECRAFT_1_21_9, true),
-        map(0x61, MINECRAFT_26_1, true));
+        map(0x61, MINECRAFT_26_1, true),
+        map(0x63, MINECRAFT_26_3, true));
       // minecraft:map_item_data
       clientbound.register(MapDataPacket.class, MapDataPacket::new,
         map(0x34, MINECRAFT_1_7_2, true),
@@ -341,7 +352,8 @@ public enum SonarPacketRegistry {
         map(0x2D, MINECRAFT_1_21_2, true),
         map(0x2C, MINECRAFT_1_21_5, true),
         map(0x31, MINECRAFT_1_21_9, true),
-        map(0x33, MINECRAFT_26_1, true));
+        map(0x33, MINECRAFT_26_1, true),
+        map(0x34, MINECRAFT_26_3, true));
       // minecraft:container_set_slot
       clientbound.register(SetContainerSlotPacket.class, SetContainerSlotPacket::new,
         map(0x2F, MINECRAFT_1_7_2, true),
@@ -376,7 +388,8 @@ public enum SonarPacketRegistry {
         map(0x61, MINECRAFT_1_21_2, true),
         map(0x60, MINECRAFT_1_21_5, true),
         map(0x65, MINECRAFT_1_21_9, true),
-        map(0x67, MINECRAFT_26_1, true));
+        map(0x67, MINECRAFT_26_1, true),
+        map(0x69, MINECRAFT_26_3, true));
       // minecraft:system_chat
       clientbound.register(SystemChatPacket.class, SystemChatPacket::new,
         map(0x02, MINECRAFT_1_7_2, true),
@@ -395,20 +408,23 @@ public enum SonarPacketRegistry {
         map(0x73, MINECRAFT_1_21_2, true),
         map(0x72, MINECRAFT_1_21_5, true),
         map(0x77, MINECRAFT_1_21_9, true),
-        map(0x79, MINECRAFT_26_1, true));
+        map(0x79, MINECRAFT_26_1, true),
+        map(0x7C, MINECRAFT_26_3, true));
       // minecraft:game_event
       clientbound.register(GameEventPacket.class, GameEventPacket::new,
         map(0x20, MINECRAFT_1_20_3, true),
         map(0x22, MINECRAFT_1_20_5, true),
         map(0x23, MINECRAFT_1_21_2, true),
         map(0x22, MINECRAFT_1_21_5, true),
-        map(0x26, MINECRAFT_1_21_9, true));
+        map(0x26, MINECRAFT_1_21_9, true),
+        map(0x27, MINECRAFT_26_3, true));
       // minecraft:transfer
       clientbound.register(TransferPacket.class, TransferPacket::new,
         map(0x73, MINECRAFT_1_20_5, true),
         map(0x7A, MINECRAFT_1_21_2, true),
         map(0x7F, MINECRAFT_1_21_9, true),
-        map(0x81, MINECRAFT_26_1, true));
+        map(0x81, MINECRAFT_26_1, true),
+        map(0x84, MINECRAFT_26_3, true));
       // minecraft:set_held_slot
       clientbound.register(SetHeldItemPacket.class, SetHeldItemPacket::new,
         map(0x09, MINECRAFT_1_7_2, true),
@@ -430,7 +446,8 @@ public enum SonarPacketRegistry {
         map(0x63, MINECRAFT_1_21_2, true),
         map(0x62, MINECRAFT_1_21_5, true),
         map(0x67, MINECRAFT_1_21_9, true),
-        map(0x69, MINECRAFT_26_1, true));
+        map(0x69, MINECRAFT_26_1, true),
+        map(0x6B, MINECRAFT_26_3, true));
       // minecraft:animate
       clientbound.register(EntityAnimationPacket.class, EntityAnimationPacket::new,
         map(0x0B, MINECRAFT_1_7_2, true),
@@ -462,7 +479,8 @@ public enum SonarPacketRegistry {
         map(0x6B, MINECRAFT_1_21_2, true),
         map(0x6A, MINECRAFT_1_21_5, true),
         map(0x6F, MINECRAFT_1_21_9, true),
-        map(0x71, MINECRAFT_26_1, true));
+        map(0x71, MINECRAFT_26_1, true),
+        map(0x73, MINECRAFT_26_3, true));
 
       // minecraft:client_tick_end
       serverbound.register(ClientTickEndPacket.class, ClientTickEndPacket::new,
@@ -486,7 +504,8 @@ public enum SonarPacketRegistry {
         map(0x31, MINECRAFT_1_21_2, false),
         map(0x33, MINECRAFT_1_21_4, false),
         map(0x34, MINECRAFT_1_21_6, false),
-        map(0x35, MINECRAFT_26_1, false));
+        map(0x35, MINECRAFT_26_1, false),
+        map(0x36, MINECRAFT_26_3, false));
       // minecraft:paddle_boat
       serverbound.register(PaddleBoatPacket.class, PaddleBoatPacket::new,
         map(0x11, MINECRAFT_1_9, false),
@@ -525,7 +544,8 @@ public enum SonarPacketRegistry {
         map(0x28, MINECRAFT_1_21_2, false),
         map(0x29, MINECRAFT_1_21_4, false),
         map(0x2A, MINECRAFT_1_21_6, false),
-        map(0x26, MINECRAFT_26_1, false));
+        map(0x26, MINECRAFT_26_1, false),
+        map(0x2B, MINECRAFT_26_3, false));
       // minecraft:move_vehicle
       serverbound.register(VehicleMovePacket.class, VehicleMovePacket::new,
         map(0x10, MINECRAFT_1_9, false),
@@ -734,7 +754,8 @@ public enum SonarPacketRegistry {
         map(0x3A, MINECRAFT_1_21_4, false),
         map(0x3B, MINECRAFT_1_21_5, false),
         map(0x3C, MINECRAFT_1_21_6, false),
-        map(0x3F, MINECRAFT_26_1, false));
+        map(0x3F, MINECRAFT_26_1, false),
+        map(0x2E, MINECRAFT_26_3, false));
     }
   };
 

common/src/main/java/xyz/jonesdev/sonar/common/protocol/block/BlockType.java

@@ -80,7 +80,10 @@ public enum BlockType {
     if (protocolVersion.lessThanOrEquals(MINECRAFT_1_21_11)) {
       return 9250;
     }
-    return 9451;
+    if (protocolVersion.lessThanOrEquals(MINECRAFT_26_2)) {
+      return 9451;
+    }
+    return 11185;
   }, protocolVersion -> (double) 0.75f),
   TRAPDOOR(protocolVersion -> {
     // We have to use wooden trapdoors for 1.7 since 1.7 doesn't have iron trapdoors
@@ -135,7 +138,10 @@ public enum BlockType {
     if (protocolVersion.lessThanOrEquals(MINECRAFT_1_21_11)) {
       return 12380;
     }
-    return 12582;
+    if (protocolVersion.lessThanOrEquals(MINECRAFT_26_2)) {
+      return 12582;
+    }
+    return 14429;
   }, protocolVersion -> 0.1875),
   END_PORTAL_FRAME(protocolVersion -> {
     if (protocolVersion.lessThanOrEquals(MINECRAFT_1_12_2)) {
@@ -183,7 +189,10 @@ public enum BlockType {
     if (protocolVersion.lessThanOrEquals(MINECRAFT_1_21_11)) {
       return 9272;
     }
-    return 9473;
+    if (protocolVersion.lessThanOrEquals(MINECRAFT_26_2)) {
+      return 9473;
+    }
+    return 11207;
   }, protocolVersion -> 0.8125),
   DAYLIGHT_SENSOR(protocolVersion -> {
     if (protocolVersion.lessThanOrEquals(MINECRAFT_1_12_2)) {
@@ -234,7 +243,10 @@ public enum BlockType {
     if (protocolVersion.lessThanOrEquals(MINECRAFT_1_21_11)) {
       return 11093;
     }
-    return 11295;
+    if (protocolVersion.lessThanOrEquals(MINECRAFT_26_2)) {
+      return 11295;
+    }
+    return 13062;
   }, protocolVersion -> 0.375),
   COBBLESTONE_WALL(protocolVersion -> {
     if (protocolVersion.lessThanOrEquals(MINECRAFT_1_12_2)) {
@@ -282,7 +294,10 @@ public enum BlockType {
     if (protocolVersion.lessThanOrEquals(MINECRAFT_1_21_11)) {
       return 9783;
     }
-    return 9984;
+    if (protocolVersion.lessThanOrEquals(MINECRAFT_26_2)) {
+      return 9984;
+    }
+    return 11726;
   }, protocolVersion -> 1.5),
   STONE_SLABS(protocolVersion -> {
     if (protocolVersion.lessThanOrEquals(MINECRAFT_1_12_2)) {
@@ -333,7 +348,10 @@ public enum BlockType {
     if (protocolVersion.lessThanOrEquals(MINECRAFT_1_21_11)) {
       return 13197;
     }
-    return 13399;
+    if (protocolVersion.lessThanOrEquals(MINECRAFT_26_2)) {
+      return 13399;
+    }
+    return 15252;
   }, protocolVersion -> 0.5),
   WHITE_CARPET(protocolVersion -> {
     if (protocolVersion.lessThanOrEquals(MINECRAFT_1_12_2)) {
@@ -384,7 +402,10 @@ public enum BlockType {
     if (protocolVersion.lessThanOrEquals(MINECRAFT_1_21_11)) {
       return 12694;
     }
-    return 12896;
+    if (protocolVersion.lessThanOrEquals(MINECRAFT_26_2)) {
+      return 12896;
+    }
+    return 14743;
   }, protocolVersion -> protocolVersion.compareTo(MINECRAFT_1_8) < 0 ? 0 : 0.0625);
 
   private final Function<ProtocolVersion, Integer> id;

common/src/main/java/xyz/jonesdev/sonar/common/protocol/dimension/DimensionRegistry.java

@@ -43,8 +43,10 @@ public final class DimensionRegistry {
   public final CompoundBinaryTag CODEC_1_21_11;
   public final CompoundBinaryTag CODEC_26_1;
   public final CompoundBinaryTag CODEC_26_2;
+  public final CompoundBinaryTag CODEC_26_3;
   public final CompoundBinaryTag TAGS_26_1;
   public final CompoundBinaryTag TAGS_26_2;
+  public final CompoundBinaryTag TAGS_26_3;
 
   static {
     CODEC_1_16 = getCodec("codec_1_16.nbt");
@@ -62,8 +64,10 @@ public final class DimensionRegistry {
     CODEC_1_21_11 = getCodec("codec_1_21_11.nbt");
     CODEC_26_1 = getCodec("codec_26_1.nbt");
     CODEC_26_2 = getCodec("codec_26_2.nbt");
+    CODEC_26_3 = getCodec("codec_26_3.nbt");
     TAGS_26_1 = getCodec("tags_26_1.nbt");
     TAGS_26_2 = getCodec("tags_26_2.nbt");
+    TAGS_26_3 = getCodec("tags_26_3.nbt");
   }
 
   private @NotNull CompoundBinaryTag getCodec(final @NotNull String fileName) {

common/src/main/java/xyz/jonesdev/sonar/common/protocol/entity/EntityType.java

@@ -67,7 +67,10 @@ public enum EntityType {
     if (protocolVersion.lessThanOrEquals(MINECRAFT_1_21_9)) {
       return 87;
     }
-    return 89;
+    if (protocolVersion.lessThanOrEquals(MINECRAFT_26_2)) {
+      return 89;
+    }
+    return 90;
   }),
   MINECART(protocolVersion -> {
     if (protocolVersion.lessThanOrEquals(MINECRAFT_1_13_2)) {
@@ -112,7 +115,10 @@ public enum EntityType {
     if (protocolVersion.lessThanOrEquals(MINECRAFT_1_21_9)) {
       return 84;
     }
-    return 85;
+    if (protocolVersion.lessThanOrEquals(MINECRAFT_26_2)) {
+      return 85;
+    }
+    return 86;
   });
 
   private final Function<ProtocolVersion, Integer> id;

common/src/main/java/xyz/jonesdev/sonar/common/protocol/item/ItemType.java

@@ -85,7 +85,13 @@ public enum ItemType {
     if (protocolVersion.lessThanOrEquals(MINECRAFT_1_21_11)) {
       return 1104;
     }
-    return 1105;
+    if (protocolVersion.lessThanOrEquals(MINECRAFT_26_1)) {
+      return 1105;
+    }
+    if (protocolVersion.lessThanOrEquals(MINECRAFT_26_2)) {
+      return 1133;
+    }
+    return 1238;
   }, protocolVersion -> {
     if (protocolVersion.lessThanOrEquals(MINECRAFT_1_21)) {
       return 26;
@@ -99,7 +105,10 @@ public enum ItemType {
     if (protocolVersion.lessThanOrEquals(MINECRAFT_1_21_11)) {
       return 44;
     }
-    return 46;
+    if (protocolVersion.lessThanOrEquals(MINECRAFT_26_2)) {
+      return 46;
+    }
+    return 48;
   });
 
   private final Function<ProtocolVersion, Integer> id;

common/src/main/java/xyz/jonesdev/sonar/common/protocol/packets/configuration/RegistryDataPacket.java

@@ -50,7 +50,7 @@ public final class RegistryDataPacket implements SonarPacket {
       for (final RegistryDataPacket.Bundle bundle : bundles) {
         ProtocolUtil.writeString(byteBuf, bundle.getName());
         // Write the bundle tag
-        final CompoundBinaryTag tag = bundle.getTag();
+        final BinaryTag tag = bundle.getTag();
         if (tag != null) {
           byteBuf.writeBoolean(true);
           ProtocolUtil.writeBinaryTag(byteBuf, protocolVersion, tag);
@@ -73,8 +73,7 @@ public final class RegistryDataPacket implements SonarPacket {
       final ArrayList<RegistryDataPacket.Bundle> bundles = new ArrayList<>();
       for (final BinaryTag binaryTag : rootTag.getCompound(type).getList("value")) {
         final CompoundBinaryTag tag = (CompoundBinaryTag) binaryTag;
-        // CompoundBinaryTag#getCompound(String) will return an empty compound tag when not exist.
-        bundles.add(new Bundle(tag.getString("name"), tag.get("element") == null ? null : tag.getCompound("element")));
+        bundles.add(new Bundle(tag.getString("name"), tag.get("element")));
       }
       packets[index++] = new SonarPacketSnapshot(new RegistryDataPacket(rootTag, type, bundles));
     }
@@ -86,6 +85,6 @@ public final class RegistryDataPacket implements SonarPacket {
   public static class Bundle {
     @NotNull String name;
     // In the protocol, it is able to be null
-    @Nullable CompoundBinaryTag tag;
+    @Nullable BinaryTag tag;
   }
 }

common/src/main/java/xyz/jonesdev/sonar/common/protocol/packets/play/AnimationPacket.java

@@ -46,6 +46,8 @@ public final class AnimationPacket implements SonarPacket {
     if (protocolVersion.lessThan(ProtocolVersion.MINECRAFT_1_8)) {
       entityId = byteBuf.readInt();
       type = LegacyAnimationType.getById(byteBuf.readByte());
+    } else if (protocolVersion.greaterThanOrEquals(ProtocolVersion.MINECRAFT_26_3)) {
+      hand = MAIN_HAND;
     } else if (protocolVersion.greaterThan(ProtocolVersion.MINECRAFT_1_8)) {
       // Only 1.9+ clients have an offhand
       hand = ProtocolUtil.readVarInt(byteBuf);

common/src/main/java/xyz/jonesdev/sonar/common/protocol/packets/play/ConfirmTeleportationPacket.java

@@ -32,6 +32,15 @@ import xyz.jonesdev.sonar.common.util.ProtocolUtil;
 @AllArgsConstructor
 public final class ConfirmTeleportationPacket implements SonarPacket {
   private int teleportId;
+  private double x;
+  private double y;
+  private double z;
+  private float yaw;
+  private float pitch;
+
+  public ConfirmTeleportationPacket(final int teleportId) {
+    this.teleportId = teleportId;
+  }
 
   @Override
   public void encode(final ByteBuf byteBuf, final ProtocolVersion protocolVersion) {
@@ -41,5 +50,12 @@ public final class ConfirmTeleportationPacket implements SonarPacket {
   @Override
   public void decode(final ByteBuf byteBuf, final ProtocolVersion protocolVersion) throws Exception {
     teleportId = ProtocolUtil.readVarInt(byteBuf);
+    if (protocolVersion.greaterThanOrEquals(ProtocolVersion.MINECRAFT_26_3)) {
+      x = byteBuf.readDouble();
+      y = byteBuf.readDouble();
+      z = byteBuf.readDouble();
+      yaw = byteBuf.readFloat();
+      pitch = byteBuf.readFloat();
+    }
   }
 }

common/src/main/java/xyz/jonesdev/sonar/common/protocol/packets/play/JoinGamePacket.java

@@ -148,8 +148,14 @@ public final class JoinGamePacket implements SonarPacket {
 
       ProtocolUtil.writeString(byteBuf, levelName);
       byteBuf.writeLong(partialHashedSeed);
-      byteBuf.writeByte(gamemode);
-      byteBuf.writeByte(previousGamemode);
+      if (protocolVersion.greaterThanOrEquals(ProtocolVersion.MINECRAFT_26_3)) {
+        ProtocolUtil.writeVarInt(byteBuf, gamemode);
+        // ByteBufCodecs#OPTIONAL_VAR_INT: 0 for empty, (value + 1) if present
+        ProtocolUtil.writeVarInt(byteBuf, previousGamemode == -1 ? 0 : previousGamemode + 1);
+      } else {
+        byteBuf.writeByte(gamemode);
+        byteBuf.writeByte(previousGamemode);
+      }
     }
 
     if (protocolVersion.greaterThanOrEquals(ProtocolVersion.MINECRAFT_1_16)) {
@@ -169,12 +175,11 @@ public final class JoinGamePacket implements SonarPacket {
       ProtocolUtil.writeVarInt(byteBuf, seaLevel);
     }
 
-    if (protocolVersion.greaterThanOrEquals(ProtocolVersion.MINECRAFT_1_20_5)) {
-      byteBuf.writeBoolean(secureProfile);
-    }
-
     if (protocolVersion.greaterThanOrEquals(ProtocolVersion.MINECRAFT_26_2)) {
       byteBuf.writeBoolean(onlineMode);
+      byteBuf.writeBoolean(secureProfile);
+    } else if (protocolVersion.greaterThanOrEquals(ProtocolVersion.MINECRAFT_1_20_5)) {
+      byteBuf.writeBoolean(secureProfile);
     }
   }
 

common/src/main/java/xyz/jonesdev/sonar/common/util/ProtocolUtil.java

@@ -24,6 +24,7 @@ import io.netty.channel.Channel;
 import io.netty.channel.ChannelFutureListener;
 import io.netty.handler.codec.DecoderException;
 import io.netty.handler.codec.EncoderException;
+import io.netty.util.AttributeKey;
 import io.netty.util.Version;
 import lombok.experimental.UtilityClass;
 import net.kyori.adventure.nbt.BinaryTag;
@@ -217,9 +218,20 @@ public class ProtocolUtil {
     }
   }
 
+  public static final AttributeKey<Boolean> CLOSING = AttributeKey.valueOf("sonar-graceful-close-in-progress");
+
   public static void closeWith(final @NotNull Channel channel,
                                final @NotNull ProtocolVersion protocolVersion,
                                final @NotNull Object msg) {
+    // Mark this channel as already undergoing a graceful close *before* we queue the
+    // write. If something downstream (e.g. an exception thrown right after this call,
+    // such as VerificationHandler#fail()'s QuietDecoderException) reaches
+    // TailExceptionsHandler while our writeAndFlush(...).addListener(CLOSE) is still
+    // in flight, that handler must not call ctx.close() a second time - doing so can
+    // abort the still-pending write and deliver only a truncated packet to the client
+    // (which then sees a bare disconnect/reset instead of our kick message).
+    // See: https://github.com/jonesdevelopment/sonar/issues/476
+    channel.attr(CLOSING).set(true);
     if (protocolVersion.lessThan(ProtocolVersion.MINECRAFT_1_8)) {
       channel.eventLoop().execute(() -> {
         channel.config().setAutoRead(false);

common/src/main/java/xyz/jonesdev/sonar/common/verification/GravityHandler.java

@@ -36,8 +36,9 @@ public final class GravityHandler extends VerificationHandler {
     super(user);
 
     this.preJoinHandler = preJoinHandler;
-    // Bedrock users start falling immediately
-    this.canFall = user.isGeyser();
+    // Client can send movement packet without first position-and-rot packet (usually caused by teleport, < 26.3 Java)
+    // 26.3+ client will no longer send movement packet for teleports. (positions included in teleport confirm)
+    this.canFall = user.isGeyser() || user.getProtocolVersion().greaterThanOrEquals(ProtocolVersion.MINECRAFT_26_3);
     // We don't want to check Geyser players for valid gravity, as this might cause issues because of the protocol
     this.enableGravityCheck = !user.isGeyser() && AntiBot.shouldPerform(
       Sonar.get0().getConfig().getVerification().getGravity().getTiming());
@@ -108,6 +109,8 @@ public final class GravityHandler extends VerificationHandler {
       final SetPlayerPositionRotationPacket position = (SetPlayerPositionRotationPacket) packet;
       if (teleported) {
         handleMovement(position.getX(), position.getY(), position.getZ(), position.isOnGround(), true);
+      } else if (user.getProtocolVersion().greaterThanOrEquals(ProtocolVersion.MINECRAFT_26_3)) {
+        return;
       } else if (user.getProtocolVersion().equals(ProtocolVersion.MINECRAFT_1_21_2)) {
         lastPositionPacket = position;
         return;
@@ -122,6 +125,8 @@ public final class GravityHandler extends VerificationHandler {
       if (teleported) {
         final SetPlayerPositionPacket position = (SetPlayerPositionPacket) packet;
         handleMovement(position.getX(), position.getY(), position.getZ(), position.isOnGround(), false);
+      } else if (user.getProtocolVersion().greaterThanOrEquals(ProtocolVersion.MINECRAFT_26_3)) {
+        return;
       }
       checkClientTick();
     } else if (packet instanceof ConfirmTeleportationPacket) {
@@ -133,11 +138,15 @@ public final class GravityHandler extends VerificationHandler {
       checkState(confirmTeleport.getTeleportId() == expectedTeleportId,
         "expected TP ID " + expectedTeleportId + ", but got " + confirmTeleport.getTeleportId());
 
+      final boolean v26_3 = user.getProtocolVersion().greaterThanOrEquals(ProtocolVersion.MINECRAFT_26_3);
       final boolean sendPosRotBefore = user.getProtocolVersion().equals(ProtocolVersion.MINECRAFT_1_21_2);
-      checkState(sendPosRotBefore ? lastPositionPacket != null : !expectTeleportPosRot,
-        "expected position rotation but got teleport confirm.");
-      if (!sendPosRotBefore) {
-        expectTeleportPosRot = true;
+
+      if (!v26_3) {
+        checkState(sendPosRotBefore ? lastPositionPacket != null : !expectTeleportPosRot,
+          "expected position rotation but got teleport confirm.");
+        if (!sendPosRotBefore) {
+          expectTeleportPosRot = true;
+        }
       }
 
       // The first teleport ID is not useful for us in this context, skip it
@@ -147,7 +156,11 @@ public final class GravityHandler extends VerificationHandler {
         // Enable the movement checks
         teleported = true;
 
-        if (sendPosRotBefore) {
+        if (v26_3) {
+          handleMovement(
+            confirmTeleport.getX(), confirmTeleport.getY(), confirmTeleport.getZ(),
+            false, true);
+        } else if (sendPosRotBefore) {
           handleMovement(
             lastPositionPacket.getX(), lastPositionPacket.getY(), lastPositionPacket.getZ(),
             lastPositionPacket.isOnGround(), true);
@@ -248,7 +261,8 @@ public final class GravityHandler extends VerificationHandler {
       // The deltaY is 0 whenever the player sends their first position packet.
       // We have to account for this or the player will falsely fail the verification.
       if (deltaY == 0) {
-        checkState(rotated, "illegal movement packet order: " + deltaY);
+        checkState(user.getProtocolVersion().greaterThanOrEquals(ProtocolVersion.MINECRAFT_26_3) || rotated,
+          "illegal movement packet order: " + deltaY);
         checkState(movementTick == 0, "illegal y motion: " + movementTick);
         // 1.7 clients immediately start falling after this packet
         if (user.getProtocolVersion().lessThan(ProtocolVersion.MINECRAFT_1_8)) {

common/src/main/java/xyz/jonesdev/sonar/common/verification/ProtocolHandler.java

@@ -71,7 +71,8 @@ public final class ProtocolHandler extends VerificationHandler {
         waitingSlotConfirm = false;
         expectedSlotId = -1;
         // The player did not send duplicate packets, so they pass this check
-        if (user.isGeyser()) {
+        // 26.3+ removed client-side swing packet echo, so exempt 26.3+ from the arm animation check
+        if (user.isGeyser() || user.getProtocolVersion().greaterThanOrEquals(ProtocolVersion.MINECRAFT_26_3)) {
           markSuccess();
         } else {
           sendArmAnimation();

common/src/main/java/xyz/jonesdev/sonar/common/verification/VerificationHandler.java

@@ -121,7 +121,7 @@ public abstract class VerificationHandler implements SonarPacketListener {
       // The user is allowed to disable the blacklist entirely by setting the threshold to 0
       final int limit = Sonar.get0().getConfig().getVerification().getBlacklistThreshold();
       // The player hasn't been blacklisted yet, so skip this iteration
-      if (newScore < limit) break blacklist;
+      if (limit <= 0 || newScore < limit) break blacklist;
 
       GlobalSonarStatistics.totalBlacklistedPlayers++;
 

gradle.properties

@@ -1,3 +1,3 @@
 group=xyz.jonesdev
-version=2.1.49
+version=2.1.53
 description=A lightweight, effective, and easy-to-use anti-bot plugin for Velocity, BungeeCord, and Bukkit.

gradle/libs.versions.toml

@@ -1,5 +1,5 @@
 [versions]
-netty = "4.2.15.Final"
+netty = "4.2.19.Final"
 adventure = "5.2.0"
 adventure-platform = "4.4.1"
 bstats = "3.2.1"
@@ -8,8 +8,8 @@ pluginyml = "0.6.0"
 
 [plugins]
 indra-git = "net.kyori.indra.git:3.2.0"
-shadow = "com.gradleup.shadow:9.4.3"
-spotless = "com.diffplug.spotless:8.8.0"
+shadow = "com.gradleup.shadow:9.6.1"
+spotless = "com.diffplug.spotless:8.10.4"
 pluginyml-bungee = { id = "net.minecrell.plugin-yml.bungee", version.ref = "pluginyml" }
 pluginyml-bukkit = { id = "net.minecrell.plugin-yml.bukkit", version.ref = "pluginyml" }
 pluginyml-paper = { id = "net.minecrell.plugin-yml.paper", version.ref = "pluginyml" }
@@ -20,7 +20,6 @@ adventure-minimessage = { module = "net.kyori:adventure-text-minimessage", versi
 adventure-serializer = { module = "net.kyori:adventure-text-serializer-gson", version.ref = "adventure" }
 adventure-nbt = { module = "net.kyori:adventure-nbt", version.ref = "adventure" }
 adventure-platform-bukkit = { module = "net.kyori:adventure-platform-bukkit", version.ref = "adventure-platform" }
-adventure-platform-bungee = { module = "net.kyori:adventure-platform-bungeecord", version.ref = "adventure-platform" }
 libby-core = { module = "com.alessiodp.libby:libby-core", version.ref = "libby" }
 libby-bungee = { module = "com.alessiodp.libby:libby-bungee", version.ref = "libby" }
 libby-bukkit = { module = "com.alessiodp.libby:libby-bukkit", version.ref = "libby" }
@@ -34,7 +33,7 @@ caffeine = "com.github.ben-manes.caffeine:caffeine:3.2.4"
 annotations = "org.jetbrains:annotations:26.1.0"
 simpleyaml = "com.github.Carleslc.Simple-YAML:Simple-Yaml:1.8.4"
 ormlite = "com.j256.ormlite:ormlite-jdbc:6.1"
-lombok = "org.projectlombok:lombok:1.18.46"
+lombok = "org.projectlombok:lombok:1.18.48"
 bungeecord = "net.md-5:bungeecord-proxy:26.1-R0.1-SNAPSHOT"
 velocity = "io.papermc.velocity:velocity-proxy:3.5.0-SNAPSHOT"
 paper = "io.papermc.paper:paper-api:1.21.10-R0.1-SNAPSHOT"

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-9.6.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.8.1-bin.zip
 networkTimeout=10000
 retries=0
 retryBackOffMs=500

gradlew.bat

@@ -26,6 +26,33 @@
 @rem Set local scope for the variables, and ensure extensions are enabled
 setlocal EnableExtensions
 
+@rem Catch executions from older scripts and ensure they exit cleanly.
+@rem This can be removed once we can be reasonably confident that few people
+@rem will be migrating directly to this new wrapper.
+goto afterSafetyNet
+::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+goto exitWithErrorLevel
+:afterSafetyNet
+
 set DIRNAME=%~dp0
 if "%DIRNAME%"=="" set DIRNAME=.
 @rem This is normally unused
@@ -45,13 +72,14 @@ set JAVA_EXE=java.exe
 %JAVA_EXE% -version >NUL 2>&1
 if %ERRORLEVEL% equ 0 goto execute
 
-echo. 1>&2
-echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
-echo. 1>&2
-echo Please set the JAVA_HOME variable in your environment to match the 1>&2
-echo location of your Java installation. 1>&2
+1>&2 echo.
+1>&2 echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+1>&2 echo.
+1>&2 echo Please set the JAVA_HOME variable in your environment to match the
+1>&2 echo location of your Java installation.
 
 "%COMSPEC%" /c exit 1
+goto exitWithErrorLevel
 
 :findJavaFromJavaHome
 set JAVA_HOME=%JAVA_HOME:"=%
@@ -59,13 +87,14 @@ set JAVA_EXE=%JAVA_HOME%/bin/java.exe
 
 if exist "%JAVA_EXE%" goto execute
 
-echo. 1>&2
-echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
-echo. 1>&2
-echo Please set the JAVA_HOME variable in your environment to match the 1>&2
-echo location of your Java installation. 1>&2
+1>&2 echo.
+1>&2 echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+1>&2 echo.
+1>&2 echo Please set the JAVA_HOME variable in your environment to match the
+1>&2 echo location of your Java installation.
 
 "%COMSPEC%" /c exit 1
+goto exitWithErrorLevel
 
 :execute
 @rem Setup the command line
@@ -75,8 +104,9 @@ echo location of your Java installation. 1>&2
 @rem Execute gradlew
 @rem endlocal doesn't take effect until after the line is parsed and variables are expanded
 @rem which allows us to clear the local environment before executing the java command
-endlocal & "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %* & call :exitWithErrorLevel
+endlocal & "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %* & call :exitWithErrorLevel & goto exitWithErrorLevel
 
+@rem This label must not be changed. We rely on old scripts being able to jump to this point.
 :exitWithErrorLevel
 @rem Use "%COMSPEC%" /c exit to allow operators to work properly in scripts
 "%COMSPEC%" /c exit %ERRORLEVEL%