Merge branch 'master' into fix-fabric-world-manager-performance

README.md

@@ -14,16 +14,15 @@ The ultimate goal of this project is to allow Minecraft: Bedrock Edition users t
 
 Special thanks to the DragonProxy project for being a trailblazer in protocol translation and for all the team members who have joined us here!
 
-### Currently supporting Minecraft Bedrock 1.20.80 - 1.21.3 and Minecraft Java 1.21
+## Supported Versions
+Geyser is currently supporting Minecraft Bedrock 1.20.80 - 1.21.3 and Minecraft Java Server 1.21. For more info please see [here](https://geysermc.org/wiki/geyser/supported-versions/).
 
 ## Setting Up
-Take a look [here](https://wiki.geysermc.org/geyser/setup/) for how to set up Geyser.
+Take a look [here](https://geysermc.org/wiki/geyser/setup/) for how to set up Geyser.
-
-[![YouTube Video](https://img.youtube.com/vi/U7dZZ8w7Gi4/0.jpg)](https://www.youtube.com/watch?v=U7dZZ8w7Gi4)
 
 ## Links:
 - Website: https://geysermc.org
-- Docs: https://wiki.geysermc.org/geyser/
+- Docs: https://geysermc.org/wiki/geyser/
 - Download: https://geysermc.org/download
 - Discord: https://discord.gg/geysermc
 - Donate: https://opencollective.com/geysermc
@@ -34,7 +33,7 @@ Take a look [here](https://wiki.geysermc.org/geyser/setup/) for how to set up Ge
 - Some Entity Flags
 
 ## What can't be fixed
-There are a few things Geyser is unable to support due to various differences between Minecraft Bedrock and Java. For a list of these limitations, see the [Current Limitations](https://wiki.geysermc.org/geyser/current-limitations/) page.
+There are a few things Geyser is unable to support due to various differences between Minecraft Bedrock and Java. For a list of these limitations, see the [Current Limitations](https://geysermc.org/wiki/geyser/current-limitations/) page.
 
 ## Compiling
 1. Clone the repo to your computer
@@ -47,7 +46,7 @@ you're interested in helping out with Geyser.
 
 ## Libraries Used:
 - [Adventure Text Library](https://github.com/KyoriPowered/adventure)
-- [NukkitX Bedrock Protocol Library](https://github.com/NukkitX/Protocol)
+- [CloudburstMC Bedrock Protocol Library](https://github.com/CloudburstMC/Protocol)
-- [Steveice10's Java Protocol Library](https://github.com/Steveice10/MCProtocolLib)
+- [GeyserMC's Java Protocol Library](https://github.com/GeyserMC/MCProtocolLib)
 - [TerminalConsoleAppender](https://github.com/Minecrell/TerminalConsoleAppender)
 - [Simple Logging Facade for Java (slf4j)](https://github.com/qos-ch/slf4j)

api/build.gradle.kts

@@ -1,8 +1,24 @@
 plugins {
+    // Allow blossom to mark sources root of templates
+    idea
     id("geyser.publish-conventions")
+    alias(libs.plugins.blossom)
 }
 
 dependencies {
     api(libs.base.api)
     api(libs.math)
 }
+
+version = property("version")!!
+val apiVersion = (version as String).removeSuffix("-SNAPSHOT")
+
+sourceSets {
+    main {
+        blossom {
+            javaSources {
+                property("version", apiVersion)
+            }
+        }
+    }
+}

api/src/main/java-templates/org/geysermc/geyser/api/BuildData.java

@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2024 GeyserMC. http://geysermc.org
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @author GeyserMC
+ * @link https://github.com/GeyserMC/Geyser
+ */
+
+package org.geysermc.geyser.api;
+
+import org.geysermc.api.util.ApiVersion;
+
+/**
+ * Not a public API. For internal use only. May change without notice.
+ * This class is processed before compilation to insert build properties.
+ */
+class BuildData {
+    static final String VERSION = "{{ version }}";
+    static final ApiVersion API_VERSION;
+
+    static {
+        String[] parts = VERSION.split("\\.");
+        if (parts.length != 3) {
+            throw new RuntimeException("Invalid api version: " + VERSION);
+        }
+
+        try {
+            int human = Integer.parseInt(parts[0]);
+            int major = Integer.parseInt(parts[1]);
+            int minor = Integer.parseInt(parts[2]);
+            API_VERSION = new ApiVersion(human, major, minor);
+        } catch (Exception e) {
+            throw new RuntimeException("Invalid api version: " + VERSION, e);
+        }
+    }
+}

api/src/main/java/org/geysermc/geyser/api/GeyserApi.java

@@ -29,6 +29,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.geysermc.api.Geyser;
 import org.geysermc.api.GeyserApiBase;
+import org.geysermc.api.util.ApiVersion;
 import org.geysermc.geyser.api.command.CommandSource;
 import org.geysermc.geyser.api.connection.GeyserConnection;
 import org.geysermc.geyser.api.event.EventBus;
@@ -169,4 +170,14 @@ public interface GeyserApi extends GeyserApiBase {
     static GeyserApi api() {
         return Geyser.api(GeyserApi.class);
     }
+
+    /**
+     * Returns the {@link ApiVersion} representing the current Geyser api version.
+     * See the <a href="https://github.com/geysermc/api/blob/master/geyser-versioning.md">Geyser version outline</a>)
+     *
+     * @return the current geyser api version
+     */
+     default ApiVersion geyserApiVersion() {
+        return BuildData.API_VERSION;
+     }
 }

api/src/main/java/org/geysermc/geyser/api/command/Command.java

@@ -28,7 +28,9 @@ package org.geysermc.geyser.api.command;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.geysermc.geyser.api.GeyserApi;
 import org.geysermc.geyser.api.connection.GeyserConnection;
+import org.geysermc.geyser.api.event.lifecycle.GeyserRegisterPermissionsEvent;
 import org.geysermc.geyser.api.extension.Extension;
+import org.geysermc.geyser.api.util.TriState;
 
 import java.util.Collections;
 import java.util.List;
@@ -58,15 +60,15 @@ public interface Command {
      * Gets the permission node associated with
      * this command.
      *
-     * @return the permission node for this command
+     * @return the permission node for this command if defined, otherwise an empty string
      */
     @NonNull
     String permission();
 
     /**
-     * Gets the aliases for this command.
+     * Gets the aliases for this command, as an unmodifiable list
      *
-     * @return the aliases for this command
+     * @return the aliases for this command as an unmodifiable list
      */
     @NonNull
     List<String> aliases();
@@ -75,35 +77,39 @@ public interface Command {
      * Gets if this command is designed to be used only by server operators.
      *
      * @return if this command is designated to be used only by server operators.
+     * @deprecated this method is not guaranteed to provide meaningful or expected results.
      */
-    boolean isSuggestedOpOnly();
+    @Deprecated(forRemoval = true)
-
+    default boolean isSuggestedOpOnly() {
-    /**
+        return false;
-     * Gets if this command is executable on console.
-     *
-     * @return if this command is executable on console
-     */
-    boolean isExecutableOnConsole();
-
-    /**
-     * Gets the subcommands associated with this
-     * command. Mainly used within the Geyser Standalone
-     * GUI to know what subcommands are supported.
-     *
-     * @return the subcommands associated with this command
-     */
-    @NonNull
-    default List<String> subCommands() {
-        return Collections.emptyList();
     }
 
     /**
-     * Used to send a deny message to Java players if this command can only be used by Bedrock players.
+     * @return true if this command is executable on console
-     *
+     * @deprecated use {@link #isPlayerOnly()} instead (inverted)
-     * @return true if this command can only be used by Bedrock players.
      */
-    default boolean isBedrockOnly() {
+    @Deprecated(forRemoval = true)
-        return false;
+    default boolean isExecutableOnConsole() {
+        return !isPlayerOnly();
+    }
+
+    /**
+     * @return true if this command can only be used by players
+     */
+    boolean isPlayerOnly();
+
+    /**
+     * @return true if this command can only be used by Bedrock players
+     */
+    boolean isBedrockOnly();
+
+    /**
+     * @deprecated this method will always return an empty immutable list
+     */
+    @Deprecated(forRemoval = true)
+    @NonNull
+    default List<String> subCommands() {
+        return Collections.emptyList();
     }
 
     /**
@@ -128,7 +134,7 @@ public interface Command {
          * is an instance of this source.
          *
          * @param sourceType the source type
-         * @return the builder
+         * @return this builder
          */
         Builder<T> source(@NonNull Class<? extends T> sourceType);
 
@@ -136,7 +142,7 @@ public interface Command {
          * Sets the command name.
          *
          * @param name the command name
-         * @return the builder
+         * @return this builder
          */
         Builder<T> name(@NonNull String name);
 
@@ -144,23 +150,40 @@ public interface Command {
          * Sets the command description.
          *
          * @param description the command description
-         * @return the builder
+         * @return this builder
          */
         Builder<T> description(@NonNull String description);
 
         /**
-         * Sets the permission node.
+         * Sets the permission node required to run this command. <br>
+         * It will not be registered with any permission registries, such as an underlying server,
+         * or a permissions Extension (unlike {@link #permission(String, TriState)}).
          *
          * @param permission the permission node
-         * @return the builder
+         * @return this builder
          */
         Builder<T> permission(@NonNull String permission);
 
+        /**
+         * Sets the permission node and its default value. The usage of the default value is platform dependant
+         * and may or may not be used. For example, it may be registered to an underlying server.
+         * <p>
+         * Extensions may instead listen for {@link GeyserRegisterPermissionsEvent} to register permissions,
+         * especially if the same permission is required by multiple commands. Also see this event for TriState meanings.
+         *
+         * @param permission the permission node
+         * @param defaultValue the node's default value
+         * @return this builder
+         * @deprecated this method is experimental and may be removed in the future
+         */
+        @Deprecated
+        Builder<T> permission(@NonNull String permission, @NonNull TriState defaultValue);
+
         /**
          * Sets the aliases.
          *
          * @param aliases the aliases
-         * @return the builder
+         * @return this builder
          */
         Builder<T> aliases(@NonNull List<String> aliases);
 
@@ -168,46 +191,62 @@ public interface Command {
          * Sets if this command is designed to be used only by server operators.
          *
          * @param suggestedOpOnly if this command is designed to be used only by server operators
-         * @return the builder
+         * @return this builder
+         * @deprecated this method is not guaranteed to produce meaningful or expected results
          */
+        @Deprecated(forRemoval = true)
         Builder<T> suggestedOpOnly(boolean suggestedOpOnly);
 
         /**
          * Sets if this command is executable on console.
          *
          * @param executableOnConsole if this command is executable on console
-         * @return the builder
+         * @return this builder
+         * @deprecated use {@link #isPlayerOnly()} instead (inverted)
          */
+        @Deprecated(forRemoval = true)
         Builder<T> executableOnConsole(boolean executableOnConsole);
 
+        /**
+         * Sets if this command can only be executed by players.
+         *
+         * @param playerOnly if this command is player only
+         * @return this builder
+         */
+        Builder<T> playerOnly(boolean playerOnly);
+
+        /**
+         * Sets if this command can only be executed by bedrock players.
+         *
+         * @param bedrockOnly if this command is bedrock only
+         * @return this builder
+         */
+        Builder<T> bedrockOnly(boolean bedrockOnly);
+
         /**
          * Sets the subcommands.
          *
          * @param subCommands the subcommands
-         * @return the builder
+         * @return this builder
+         * @deprecated this method has no effect
          */
-        Builder<T> subCommands(@NonNull List<String> subCommands);
+        @Deprecated(forRemoval = true)
-
+        default Builder<T> subCommands(@NonNull List<String> subCommands) {
-        /**
+            return this;
-         * Sets if this command is bedrock only.
+        }
-         *
-         * @param bedrockOnly if this command is bedrock only
-         * @return the builder
-         */
-        Builder<T> bedrockOnly(boolean bedrockOnly);
 
         /**
          * Sets the {@link CommandExecutor} for this command.
          *
          * @param executor the command executor
-         * @return the builder
+         * @return this builder
          */
         Builder<T> executor(@NonNull CommandExecutor<T> executor);
 
         /**
          * Builds the command.
          *
-         * @return the command
+         * @return a new command from this builder
          */
         @NonNull
         Command build();

api/src/main/java/org/geysermc/geyser/api/command/CommandSource.java

@@ -26,6 +26,10 @@
 package org.geysermc.geyser.api.command;
 
 import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.checker.nullness.qual.Nullable;
+import org.geysermc.geyser.api.connection.GeyserConnection;
+
+import java.util.UUID;
 
 /**
  * Represents an instance capable of sending commands.
@@ -64,6 +68,17 @@ public interface CommandSource {
      */
     boolean isConsole();
 
+    /**
+     * @return a Java UUID if this source represents a player, otherwise null
+     */
+    @Nullable UUID playerUuid();
+
+    /**
+     * @return a GeyserConnection if this source represents a Bedrock player that is connected
+     * to this Geyser instance, otherwise null
+     */
+    @Nullable GeyserConnection connection();
+
     /**
      * Returns the locale of the command source.
      *

api/src/main/java/org/geysermc/geyser/api/connection/GeyserConnection.java

@@ -132,4 +132,9 @@ public interface GeyserConnection extends Connection, CommandSource {
     @Deprecated
     @NonNull
     Set<String> fogEffects();
+
+    /**
+     * Returns the current ping of the connection.
+     */
+    int ping();
 }

api/src/main/java/org/geysermc/geyser/api/entity/EntityData.java

@@ -81,4 +81,10 @@ public interface EntityData {
      * @return whether the movement is locked
      */
     boolean isMovementLocked();
+
+    /**
+     * Sends a request to the Java server to switch the items in the main and offhand.
+     * There is no guarantee of the server accepting the request.
+     */
+    void switchHands();
 }

api/src/main/java/org/geysermc/geyser/api/event/lifecycle/GeyserDefineCommandsEvent.java

@@ -50,7 +50,7 @@ public interface GeyserDefineCommandsEvent extends Event {
     /**
      * Gets all the registered built-in {@link Command}s.
      *
-     * @return all the registered built-in commands
+     * @return all the registered built-in commands as an unmodifiable map
      */
     @NonNull
     Map<String, Command> commands();

api/src/main/java/org/geysermc/geyser/api/event/lifecycle/GeyserRegisterPermissionCheckersEvent.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2019-2023 GeyserMC. http://geysermc.org
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @author GeyserMC
+ * @link https://github.com/GeyserMC/Geyser
+ */
+
+package org.geysermc.geyser.api.event.lifecycle;
+
+import org.geysermc.event.Event;
+import org.geysermc.event.PostOrder;
+import org.geysermc.geyser.api.permission.PermissionChecker;
+
+/**
+ * Fired by any permission manager implementations that wish to add support for custom permission checking.
+ * This event is not guaranteed to be fired - it is currently only fired on Geyser-Standalone and ViaProxy.
+ * <p>
+ * Subscribing to this event with an earlier {@link PostOrder} and registering a {@link PermissionChecker}
+ * will result in that checker having a higher priority than others.
+ */
+public interface GeyserRegisterPermissionCheckersEvent extends Event {
+
+    void register(PermissionChecker checker);
+}

api/src/main/java/org/geysermc/geyser/api/event/lifecycle/GeyserRegisterPermissionsEvent.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2019-2023 GeyserMC. http://geysermc.org
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @author GeyserMC
+ * @link https://github.com/GeyserMC/Geyser
+ */
+
+package org.geysermc.geyser.api.event.lifecycle;
+
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.geysermc.event.Event;
+import org.geysermc.geyser.api.util.TriState;
+
+/**
+ * Fired by anything that wishes to gather permission nodes and defaults.
+ * <p>
+ * This event is not guaranteed to be fired, as certain Geyser platforms do not have a native permission system.
+ * It can be expected to fire on Geyser-Spigot, Geyser-NeoForge, Geyser-Standalone, and Geyser-ViaProxy
+ * It may be fired by a 3rd party regardless of the platform.
+ */
+public interface GeyserRegisterPermissionsEvent extends Event {
+
+    /**
+     * Registers a permission node and its default value with the firer.<p>
+     * {@link TriState#TRUE} corresponds to all players having the permission by default.<br>
+     * {@link TriState#NOT_SET} corresponds to only server operators having the permission by default (if such a concept exists on the platform).<br>
+     * {@link TriState#FALSE} corresponds to no players having the permission by default.<br>
+     *
+     * @param permission the permission node to register
+     * @param defaultValue the default value of the node
+     */
+    void register(@NonNull String permission, @NonNull TriState defaultValue);
+}

api/src/main/java/org/geysermc/geyser/api/extension/Extension.java

@@ -107,6 +107,15 @@ public interface Extension extends EventRegistrar {
         return this.extensionLoader().description(this);
     }
 
+    /**
+     * @return the root command that all of this extension's commands will stem from.
+     *         By default, this is the extension's id.
+     */
+    @NonNull
+    default String rootCommand() {
+        return this.description().id();
+    }
+
     /**
      * Gets the extension's logger
      *

api/src/main/java/org/geysermc/geyser/api/extension/ExtensionDescription.java

@@ -59,33 +59,46 @@ public interface ExtensionDescription {
     String main();
 
     /**
-     * Gets the extension's major api version
+     * Represents the human api version that the extension requires.
+     * See the <a href="https://github.com/geysermc/api/blob/master/geyser-versioning.md">Geyser version outline</a>)
+     * for more details on the Geyser API version.
      *
-     * @return the extension's major api version
+     * @return the extension's requested human api version
+     */
+    int humanApiVersion();
+
+    /**
+     * Represents the major api version that the extension requires.
+     * See the <a href="https://github.com/geysermc/api/blob/master/geyser-versioning.md">Geyser version outline</a>)
+     * for more details on the Geyser API version.
+     *
+     * @return the extension's requested major api version
      */
     int majorApiVersion();
 
     /**
-     * Gets the extension's minor api version
+     * Represents the minor api version that the extension requires.
+     * See the <a href="https://github.com/geysermc/api/blob/master/geyser-versioning.md">Geyser version outline</a>)
+     * for more details on the Geyser API version.
      *
-     * @return the extension's minor api version
+     * @return the extension's requested minor api version
      */
     int minorApiVersion();
 
     /**
-     * Gets the extension's patch api version
+     * No longer in use. Geyser is now using an adaption of the romantic versioning scheme.
-     *
+     * See <a href="https://github.com/geysermc/api/blob/master/geyser-versioning.md">here</a> for details.
-     * @return the extension's patch api version
      */
-    int patchApiVersion();
+    @Deprecated(forRemoval = true)
+    default int patchApiVersion() {
+        return minorApiVersion();
+    }
 
     /**
-     * Gets the extension's api version.
+     * Returns the extension's requested Geyser Api version.
-     *
-     * @return the extension's api version
      */
     default String apiVersion() {
-        return majorApiVersion() + "." + minorApiVersion() + "." + patchApiVersion();
+        return humanApiVersion() + "." + majorApiVersion() + "." + minorApiVersion();
     }
 
     /**

api/src/main/java/org/geysermc/geyser/api/permission/PermissionChecker.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2019-2023 GeyserMC. http://geysermc.org
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @author GeyserMC
+ * @link https://github.com/GeyserMC/Geyser
+ */
+
+package org.geysermc.geyser.api.permission;
+
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.geysermc.geyser.api.command.CommandSource;
+import org.geysermc.geyser.api.util.TriState;
+
+/**
+ * Something capable of checking if a {@link CommandSource} has a permission
+ */
+@FunctionalInterface
+public interface PermissionChecker {
+
+    /**
+     * Checks if the given source has a permission
+     *
+     * @param source the {@link CommandSource} whose permissions should be queried
+     * @param permission the permission node to check
+     * @return a {@link TriState} as the value of the node. {@link TriState#NOT_SET} generally means that the permission
+     *         node itself was not found, and the source does not have such permission.
+     *         {@link TriState#TRUE} and {@link TriState#FALSE} represent explicitly set values.
+     */
+    @NonNull
+    TriState hasPermission(@NonNull CommandSource source, @NonNull String permission);
+}

bootstrap/bungeecord/build.gradle.kts

@@ -1,5 +1,7 @@
 dependencies {
     api(projects.core)
+
+    implementation(libs.cloud.bungee)
     implementation(libs.adventure.text.serializer.bungeecord)
     compileOnlyApi(libs.bungeecord.proxy)
 }
@@ -8,13 +10,15 @@ platformRelocate("net.md_5.bungee.jni")
 platformRelocate("com.fasterxml.jackson")
 platformRelocate("io.netty.channel.kqueue") // This is not used because relocating breaks natives, but we must include it or else we get ClassDefNotFound
 platformRelocate("net.kyori")
+platformRelocate("org.incendo")
+platformRelocate("io.leangen.geantyref") // provided by cloud, should also be relocated
 platformRelocate("org.yaml") // Broken as of 1.20
 
 // These dependencies are already present on the platform
 provided(libs.bungeecord.proxy)
 
-application {
+tasks.withType<Jar> {
-    mainClass.set("org.geysermc.geyser.platform.bungeecord.GeyserBungeeMain")
+    manifest.attributes["Main-Class"] = "org.geysermc.geyser.platform.bungeecord.GeyserBungeeMain"
 }
 
 tasks.withType<com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar> {

bootstrap/bungeecord/src/main/java/org/geysermc/geyser/platform/bungeecord/GeyserBungeePlugin.java

@@ -27,6 +27,7 @@ package org.geysermc.geyser.platform.bungeecord;
 
 import io.netty.channel.Channel;
 import net.md_5.bungee.BungeeCord;
+import net.md_5.bungee.api.CommandSender;
 import net.md_5.bungee.api.config.ListenerInfo;
 import net.md_5.bungee.api.plugin.Plugin;
 import net.md_5.bungee.protocol.ProtocolConstants;
@@ -34,17 +35,20 @@ import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.geysermc.geyser.GeyserBootstrap;
 import org.geysermc.geyser.GeyserImpl;
-import org.geysermc.geyser.api.command.Command;
-import org.geysermc.geyser.api.extension.Extension;
 import org.geysermc.geyser.api.util.PlatformType;
-import org.geysermc.geyser.command.GeyserCommandManager;
+import org.geysermc.geyser.command.CommandRegistry;
+import org.geysermc.geyser.command.CommandSourceConverter;
+import org.geysermc.geyser.command.GeyserCommandSource;
 import org.geysermc.geyser.configuration.GeyserConfiguration;
 import org.geysermc.geyser.dump.BootstrapDumpInfo;
 import org.geysermc.geyser.ping.GeyserLegacyPingPassthrough;
 import org.geysermc.geyser.ping.IGeyserPingPassthrough;
-import org.geysermc.geyser.platform.bungeecord.command.GeyserBungeeCommandExecutor;
+import org.geysermc.geyser.platform.bungeecord.command.BungeeCommandSource;
 import org.geysermc.geyser.text.GeyserLocale;
 import org.geysermc.geyser.util.FileUtils;
+import org.incendo.cloud.CommandManager;
+import org.incendo.cloud.bungee.BungeeCommandManager;
+import org.incendo.cloud.execution.ExecutionCoordinator;
 
 import java.io.File;
 import java.io.IOException;
@@ -54,21 +58,22 @@ import java.net.SocketAddress;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.Collection;
-import java.util.Map;
 import java.util.Optional;
 import java.util.UUID;
 import java.util.concurrent.TimeUnit;
 
 public class GeyserBungeePlugin extends Plugin implements GeyserBootstrap {
 
-    private GeyserCommandManager geyserCommandManager;
+    private CommandRegistry commandRegistry;
     private GeyserBungeeConfiguration geyserConfig;
     private GeyserBungeeInjector geyserInjector;
     private final GeyserBungeeLogger geyserLogger = new GeyserBungeeLogger(getLogger());
     private IGeyserPingPassthrough geyserBungeePingPassthrough;
-
     private GeyserImpl geyser;
 
+    // We can't disable the plugin; hence we need to keep track of it manually
+    private boolean disabled;
+
     @Override
     public void onLoad() {
         onGeyserInitialize();
@@ -93,16 +98,23 @@ public class GeyserBungeePlugin extends Plugin implements GeyserBootstrap {
         }
 
         if (!this.loadConfig()) {
+            disabled = true;
             return;
         }
         this.geyserLogger.setDebug(geyserConfig.isDebugMode());
         GeyserConfiguration.checkGeyserConfiguration(geyserConfig, geyserLogger);
         this.geyser = GeyserImpl.load(PlatformType.BUNGEECORD, this);
         this.geyserInjector = new GeyserBungeeInjector(this);
+
+        // Registration of listeners occurs only once
+        this.getProxy().getPluginManager().registerListener(this, new GeyserBungeeUpdateListener());
     }
 
     @Override
     public void onEnable() {
+        if (disabled) {
+            return; // Config did not load properly!
+        }
         // Big hack - Bungee does not provide us an event to listen to, so schedule a repeating
         // task that waits for a field to be filled which is set after the plugin enable
         // process is complete
@@ -143,10 +155,18 @@ public class GeyserBungeePlugin extends Plugin implements GeyserBootstrap {
             this.geyserLogger.setDebug(geyserConfig.isDebugMode());
             GeyserConfiguration.checkGeyserConfiguration(geyserConfig, geyserLogger);
         } else {
-            // For consistency with other platforms - create command manager before GeyserImpl#start()
+            var sourceConverter = new CommandSourceConverter<>(
-            // This ensures the command events are called before the item/block ones are
+                    CommandSender.class,
-            this.geyserCommandManager = new GeyserCommandManager(geyser);
+                    id -> getProxy().getPlayer(id),
-            this.geyserCommandManager.init();
+                    () -> getProxy().getConsole(),
+                    BungeeCommandSource::new
+            );
+            CommandManager<GeyserCommandSource> cloud = new BungeeCommandManager<>(
+                    this,
+                    ExecutionCoordinator.simpleCoordinator(),
+                    sourceConverter
+            );
+            this.commandRegistry = new CommandRegistry(geyser, cloud, false); // applying root permission would be a breaking change because we can't register permission defaults
         }
 
         // Force-disable query if enabled, or else Geyser won't enable
@@ -181,16 +201,6 @@ public class GeyserBungeePlugin extends Plugin implements GeyserBootstrap {
         }
 
         this.geyserInjector.initializeLocalChannel(this);
-
-        this.getProxy().getPluginManager().registerCommand(this, new GeyserBungeeCommandExecutor("geyser", this.geyser, this.geyserCommandManager.getCommands()));
-        for (Map.Entry<Extension, Map<String, Command>> entry : this.geyserCommandManager.extensionCommands().entrySet()) {
-            Map<String, Command> commands = entry.getValue();
-            if (commands.isEmpty()) {
-                continue;
-            }
-
-            this.getProxy().getPluginManager().registerCommand(this, new GeyserBungeeCommandExecutor(entry.getKey().description().id(), this.geyser, commands));
-        }
     }
 
     @Override
@@ -226,8 +236,8 @@ public class GeyserBungeePlugin extends Plugin implements GeyserBootstrap {
     }
 
     @Override
-    public GeyserCommandManager getGeyserCommandManager() {
+    public CommandRegistry getCommandRegistry() {
-        return this.geyserCommandManager;
+        return this.commandRegistry;
     }
 
     @Override

bootstrap/bungeecord/src/main/java/org/geysermc/geyser/platform/bungeecord/GeyserBungeeUpdateListener.java

@@ -29,8 +29,8 @@ import net.md_5.bungee.api.connection.ProxiedPlayer;
 import net.md_5.bungee.api.event.PostLoginEvent;
 import net.md_5.bungee.api.plugin.Listener;
 import net.md_5.bungee.event.EventHandler;
-import org.geysermc.geyser.Constants;
 import org.geysermc.geyser.GeyserImpl;
+import org.geysermc.geyser.Permissions;
 import org.geysermc.geyser.platform.bungeecord.command.BungeeCommandSource;
 import org.geysermc.geyser.util.VersionCheckUtils;
 
@@ -40,7 +40,7 @@ public final class GeyserBungeeUpdateListener implements Listener {
     public void onPlayerJoin(final PostLoginEvent event) {
         if (GeyserImpl.getInstance().getConfig().isNotifyOnNewBedrockUpdate()) {
             final ProxiedPlayer player = event.getPlayer();
-            if (player.hasPermission(Constants.UPDATE_PERMISSION)) {
+            if (player.hasPermission(Permissions.CHECK_UPDATE)) {
                 VersionCheckUtils.checkForGeyserUpdate(() -> new BungeeCommandSource(player));
             }
         }

bootstrap/bungeecord/src/main/java/org/geysermc/geyser/platform/bungeecord/command/BungeeCommandSource.java

@@ -27,19 +27,22 @@ package org.geysermc.geyser.platform.bungeecord.command;
 
 import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.serializer.bungeecord.BungeeComponentSerializer;
+import net.md_5.bungee.api.CommandSender;
 import net.md_5.bungee.api.chat.TextComponent;
 import net.md_5.bungee.api.connection.ProxiedPlayer;
 import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.checker.nullness.qual.Nullable;
 import org.geysermc.geyser.command.GeyserCommandSource;
 import org.geysermc.geyser.text.GeyserLocale;
 
 import java.util.Locale;
+import java.util.UUID;
 
 public class BungeeCommandSource implements GeyserCommandSource {
 
-    private final net.md_5.bungee.api.CommandSender handle;
+    private final CommandSender handle;
 
-    public BungeeCommandSource(net.md_5.bungee.api.CommandSender handle) {
+    public BungeeCommandSource(CommandSender handle) {
         this.handle = handle;
         // Ensure even Java players' languages are loaded
         GeyserLocale.loadGeyserLocale(this.locale());
@@ -72,12 +75,20 @@ public class BungeeCommandSource implements GeyserCommandSource {
         return !(handle instanceof ProxiedPlayer);
     }
 
+    @Override
+    public @Nullable UUID playerUuid() {
+        if (handle instanceof ProxiedPlayer player) {
+            return player.getUniqueId();
+        }
+        return null;
+    }
+
     @Override
     public String locale() {
         if (handle instanceof ProxiedPlayer player) {
             Locale locale = player.getLocale();
             if (locale != null) {
-                // Locale can be null early on in the conneciton
+                // Locale can be null early on in the connection
                 return GeyserLocale.formatLocale(locale.getLanguage() + "_" + locale.getCountry());
             }
         }
@@ -86,6 +97,12 @@ public class BungeeCommandSource implements GeyserCommandSource {
 
     @Override
     public boolean hasPermission(String permission) {
-        return handle.hasPermission(permission);
+        // Handle blank permissions ourselves, as bungeecord only handles empty ones
+        return permission.isBlank() || handle.hasPermission(permission);
+    }
+
+    @Override
+    public Object handle() {
+        return handle;
     }
 }

bootstrap/bungeecord/src/main/java/org/geysermc/geyser/platform/bungeecord/command/GeyserBungeeCommandExecutor.java

@@ -1,89 +0,0 @@
-/*
- * Copyright (c) 2019-2022 GeyserMC. http://geysermc.org
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- *
- * @author GeyserMC
- * @link https://github.com/GeyserMC/Geyser
- */
-
-package org.geysermc.geyser.platform.bungeecord.command;
-
-import net.md_5.bungee.api.ChatColor;
-import net.md_5.bungee.api.CommandSender;
-import net.md_5.bungee.api.plugin.Command;
-import net.md_5.bungee.api.plugin.TabExecutor;
-import org.geysermc.geyser.GeyserImpl;
-import org.geysermc.geyser.command.GeyserCommand;
-import org.geysermc.geyser.command.GeyserCommandExecutor;
-import org.geysermc.geyser.session.GeyserSession;
-import org.geysermc.geyser.text.GeyserLocale;
-
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.Map;
-
-public class GeyserBungeeCommandExecutor extends Command implements TabExecutor {
-    private final GeyserCommandExecutor commandExecutor;
-
-    public GeyserBungeeCommandExecutor(String name, GeyserImpl geyser, Map<String, org.geysermc.geyser.api.command.Command> commands) {
-        super(name);
-
-        this.commandExecutor = new GeyserCommandExecutor(geyser, commands);
-    }
-
-    @Override
-    public void execute(CommandSender sender, String[] args) {
-        BungeeCommandSource commandSender = new BungeeCommandSource(sender);
-        GeyserSession session = this.commandExecutor.getGeyserSession(commandSender);
-
-        if (args.length > 0) {
-            GeyserCommand command = this.commandExecutor.getCommand(args[0]);
-            if (command != null) {
-                if (!sender.hasPermission(command.permission())) {
-                    String message = GeyserLocale.getPlayerLocaleString("geyser.bootstrap.command.permission_fail", commandSender.locale());
-
-                    commandSender.sendMessage(ChatColor.RED + message);
-                    return;
-                }
-                if (command.isBedrockOnly() && session == null) {
-                    String message = GeyserLocale.getPlayerLocaleString("geyser.bootstrap.command.bedrock_only", commandSender.locale());
-
-                    commandSender.sendMessage(ChatColor.RED + message);
-                    return;
-                }
-                command.execute(session, commandSender, args.length > 1 ? Arrays.copyOfRange(args, 1, args.length) : new String[0]);
-            } else {
-                String message = GeyserLocale.getPlayerLocaleString("geyser.bootstrap.command.not_found", commandSender.locale());
-                commandSender.sendMessage(ChatColor.RED + message);
-            }
-        } else {
-            this.commandExecutor.getCommand("help").execute(session, commandSender, new String[0]);
-        }
-    }
-
-    @Override
-    public Iterable<String> onTabComplete(CommandSender sender, String[] args) {
-        if (args.length == 1) {
-            return commandExecutor.tabComplete(new BungeeCommandSource(sender));
-        } else {
-            return Collections.emptyList();
-        }
-    }
-}

bootstrap/mod/build.gradle.kts

@@ -16,6 +16,7 @@ afterEvaluate {
 dependencies {
     api(projects.core)
     compileOnly(libs.mixin)
+    compileOnly(libs.mixinextras)
 
     // Only here to suppress "unknown enum constant EnvType.CLIENT" warnings. DO NOT USE!
     compileOnly(libs.fabric.loader)

bootstrap/mod/fabric/build.gradle.kts

@@ -1,7 +1,3 @@
-plugins {
-    application
-}
-
 architectury {
     platformSetupLoomIde()
     fabric()
@@ -25,10 +21,7 @@ dependencies {
     shadow(libs.protocol.connection) { isTransitive = false }
     shadow(libs.protocol.common) { isTransitive = false }
     shadow(libs.protocol.codec) { isTransitive = false }
-    shadow(libs.minecraftauth) { isTransitive = false }
     shadow(libs.raknet) { isTransitive = false }
-
-    // Consequences of shading + relocating mcauthlib: shadow/relocate mcpl!
     shadow(libs.mcprotocollib) { isTransitive = false }
 
     // Since we also relocate cloudburst protocol: shade erosion common
@@ -38,13 +31,12 @@ dependencies {
     shadow(projects.api) { isTransitive = false }
     shadow(projects.common) { isTransitive = false }
 
-    // Permissions
+    modImplementation(libs.cloud.fabric)
-    modImplementation(libs.fabric.permissions)
+    include(libs.cloud.fabric)
-    include(libs.fabric.permissions)
 }
 
-application {
+tasks.withType<Jar> {
-    mainClass.set("org.geysermc.geyser.platform.fabric.GeyserFabricMain")
+    manifest.attributes["Main-Class"] = "org.geysermc.geyser.platform.fabric.GeyserFabricMain"
 }
 
 relocate("org.cloudburstmc.netty")

bootstrap/mod/fabric/src/main/java/org/geysermc/geyser/platform/fabric/GeyserFabricBootstrap.java

@@ -25,7 +25,6 @@
 
 package org.geysermc.geyser.platform.fabric;
 
-import me.lucko.fabric.api.permissions.v0.Permissions;
 import net.fabricmc.api.EnvType;
 import net.fabricmc.api.ModInitializer;
 import net.fabricmc.fabric.api.client.event.lifecycle.v1.ClientLifecycleEvents;
@@ -34,9 +33,16 @@ import net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents;
 import net.fabricmc.loader.api.FabricLoader;
 import net.minecraft.commands.CommandSourceStack;
 import net.minecraft.world.entity.player.Player;
-import org.checkerframework.checker.nullness.qual.NonNull;
+import org.geysermc.geyser.GeyserImpl;
+import org.geysermc.geyser.command.CommandRegistry;
+import org.geysermc.geyser.command.CommandSourceConverter;
+import org.geysermc.geyser.command.GeyserCommandSource;
 import org.geysermc.geyser.platform.mod.GeyserModBootstrap;
 import org.geysermc.geyser.platform.mod.GeyserModUpdateListener;
+import org.geysermc.geyser.platform.mod.command.ModCommandSource;
+import org.incendo.cloud.CommandManager;
+import org.incendo.cloud.execution.ExecutionCoordinator;
+import org.incendo.cloud.fabric.FabricServerCommandManager;
 
 public class GeyserFabricBootstrap extends GeyserModBootstrap implements ModInitializer {
 
@@ -70,20 +76,23 @@ public class GeyserFabricBootstrap extends GeyserModBootstrap implements ModInit
         ServerPlayConnectionEvents.JOIN.register((handler, $, $$) -> GeyserModUpdateListener.onPlayReady(handler.getPlayer()));
 
         this.onGeyserInitialize();
+
+        var sourceConverter = CommandSourceConverter.layered(
+                CommandSourceStack.class,
+                id -> getServer().getPlayerList().getPlayer(id),
+                Player::createCommandSourceStack,
+                () -> getServer().createCommandSourceStack(), // NPE if method reference is used, since server is not available yet
+                ModCommandSource::new
+        );
+        CommandManager<GeyserCommandSource> cloud = new FabricServerCommandManager<>(
+                ExecutionCoordinator.simpleCoordinator(),
+                sourceConverter
+        );
+        this.setCommandRegistry(new CommandRegistry(GeyserImpl.getInstance(), cloud, false)); // applying root permission would be a breaking change because we can't register permission defaults
     }
 
     @Override
     public boolean isServer() {
         return FabricLoader.getInstance().getEnvironmentType().equals(EnvType.SERVER);
     }
-
-    @Override
-    public boolean hasPermission(@NonNull Player source, @NonNull String permissionNode) {
-        return Permissions.check(source, permissionNode);
-    }
-
-    @Override
-    public boolean hasPermission(@NonNull CommandSourceStack source, @NonNull String permissionNode, int permissionLevel) {
-        return Permissions.check(source, permissionNode, permissionLevel);
-    }
 }

bootstrap/mod/neoforge/build.gradle.kts

@@ -1,10 +1,7 @@
-plugins {
-    application
-}
-
 // This is provided by "org.cloudburstmc.math.mutable" too, so yeet.
 // NeoForge's class loader is *really* annoying.
 provided("org.cloudburstmc.math", "api")
+provided("com.google.errorprone", "error_prone_annotations")
 
 architectury {
     platformSetupLoomIde()
@@ -37,10 +34,13 @@ dependencies {
 
     // Include all transitive deps of core via JiJ
     includeTransitive(projects.core)
+
+    modImplementation(libs.cloud.neoforge)
+    include(libs.cloud.neoforge)
 }
 
-application {
+tasks.withType<Jar> {
-    mainClass.set("org.geysermc.geyser.platform.forge.GeyserNeoForgeMain")
+    manifest.attributes["Main-Class"] = "org.geysermc.geyser.platform.neoforge.GeyserNeoForgeMain"
 }
 
 tasks {

bootstrap/mod/neoforge/src/main/java/org/geysermc/geyser/platform/neoforge/GeyserNeoForgeBootstrap.java

@@ -27,6 +27,7 @@ package org.geysermc.geyser.platform.neoforge;
 
 import net.minecraft.commands.CommandSourceStack;
 import net.minecraft.world.entity.player.Player;
+import net.neoforged.bus.api.EventPriority;
 import net.neoforged.fml.ModContainer;
 import net.neoforged.fml.common.Mod;
 import net.neoforged.fml.loading.FMLLoader;
@@ -35,15 +36,22 @@ import net.neoforged.neoforge.event.GameShuttingDownEvent;
 import net.neoforged.neoforge.event.entity.player.PlayerEvent;
 import net.neoforged.neoforge.event.server.ServerStartedEvent;
 import net.neoforged.neoforge.event.server.ServerStoppingEvent;
-import org.checkerframework.checker.nullness.qual.NonNull;
+import net.neoforged.neoforge.server.permission.events.PermissionGatherEvent;
+import org.geysermc.geyser.api.event.lifecycle.GeyserRegisterPermissionsEvent;
+import org.geysermc.geyser.command.CommandSourceConverter;
+import org.geysermc.geyser.command.GeyserCommandSource;
 import org.geysermc.geyser.platform.mod.GeyserModBootstrap;
 import org.geysermc.geyser.platform.mod.GeyserModUpdateListener;
+import org.geysermc.geyser.platform.mod.command.ModCommandSource;
+import org.incendo.cloud.CommandManager;
+import org.incendo.cloud.execution.ExecutionCoordinator;
+import org.incendo.cloud.neoforge.NeoForgeServerCommandManager;
+
+import java.util.Objects;
 
 @Mod(ModConstants.MOD_ID)
 public class GeyserNeoForgeBootstrap extends GeyserModBootstrap {
 
-    private final GeyserNeoForgePermissionHandler permissionHandler = new GeyserNeoForgePermissionHandler();
-
     public GeyserNeoForgeBootstrap(ModContainer container) {
         super(new GeyserNeoForgePlatform(container));
 
@@ -56,9 +64,25 @@ public class GeyserNeoForgeBootstrap extends GeyserModBootstrap {
 
         NeoForge.EVENT_BUS.addListener(this::onServerStopping);
         NeoForge.EVENT_BUS.addListener(this::onPlayerJoin);
-        NeoForge.EVENT_BUS.addListener(this.permissionHandler::onPermissionGather);
+
+        NeoForge.EVENT_BUS.addListener(EventPriority.HIGHEST, this::onPermissionGather);
 
         this.onGeyserInitialize();
+
+        var sourceConverter = CommandSourceConverter.layered(
+                CommandSourceStack.class,
+                id -> getServer().getPlayerList().getPlayer(id),
+                Player::createCommandSourceStack,
+                () -> getServer().createCommandSourceStack(),
+                ModCommandSource::new
+        );
+        CommandManager<GeyserCommandSource> cloud = new NeoForgeServerCommandManager<>(
+                ExecutionCoordinator.simpleCoordinator(),
+                sourceConverter
+        );
+        GeyserNeoForgeCommandRegistry registry = new GeyserNeoForgeCommandRegistry(getGeyser(), cloud);
+        this.setCommandRegistry(registry);
+        NeoForge.EVENT_BUS.addListener(EventPriority.LOWEST, registry::onPermissionGatherForUndefined);
     }
 
     private void onServerStarted(ServerStartedEvent event) {
@@ -87,13 +111,17 @@ public class GeyserNeoForgeBootstrap extends GeyserModBootstrap {
         return FMLLoader.getDist().isDedicatedServer();
     }
 
-    @Override
+    private void onPermissionGather(PermissionGatherEvent.Nodes event) {
-    public boolean hasPermission(@NonNull Player source, @NonNull String permissionNode) {
+        getGeyser().eventBus().fire(
-        return this.permissionHandler.hasPermission(source, permissionNode);
+            (GeyserRegisterPermissionsEvent) (permission, defaultValue) -> {
-    }
+                Objects.requireNonNull(permission, "permission");
+                Objects.requireNonNull(defaultValue, "permission default for " + permission);
 
-    @Override
+                if (permission.isBlank()) {
-    public boolean hasPermission(@NonNull CommandSourceStack source, @NonNull String permissionNode, int permissionLevel) {
+                    return;
-        return this.permissionHandler.hasPermission(source, permissionNode, permissionLevel);
+                }
+                PermissionUtils.register(permission, defaultValue, event);
+            }
+        );
     }
 }

bootstrap/mod/neoforge/src/main/java/org/geysermc/geyser/platform/neoforge/GeyserNeoForgeCommandRegistry.java

@@ -0,0 +1,101 @@
+/*
+ * Copyright (c) 2019-2024 GeyserMC. http://geysermc.org
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @author GeyserMC
+ * @link https://github.com/GeyserMC/Geyser
+ */
+
+package org.geysermc.geyser.platform.neoforge;
+
+import net.neoforged.neoforge.server.permission.events.PermissionGatherEvent;
+import org.geysermc.geyser.GeyserImpl;
+import org.geysermc.geyser.api.event.lifecycle.GeyserRegisterPermissionsEvent;
+import org.geysermc.geyser.api.util.TriState;
+import org.geysermc.geyser.command.CommandRegistry;
+import org.geysermc.geyser.command.GeyserCommand;
+import org.geysermc.geyser.command.GeyserCommandSource;
+import org.incendo.cloud.CommandManager;
+import org.incendo.cloud.neoforge.PermissionNotRegisteredException;
+
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+public class GeyserNeoForgeCommandRegistry extends CommandRegistry {
+
+    /**
+     * Permissions with an undefined permission default. Use Set to not register the same fallback more than once.
+     * NeoForge requires that all permissions are registered, and cloud-neoforge follows that.
+     * This is unlike most platforms, on which we wouldn't register a permission if no default was provided.
+     */
+    private final Set<String> undefinedPermissions = new HashSet<>();
+
+    public GeyserNeoForgeCommandRegistry(GeyserImpl geyser, CommandManager<GeyserCommandSource> cloud) {
+        super(geyser, cloud);
+    }
+
+    @Override
+    protected void register(GeyserCommand command, Map<String, GeyserCommand> commands) {
+        super.register(command, commands);
+
+        // FIRST STAGE: Collect all permissions that may have undefined defaults.
+        if (!command.permission().isBlank() && command.permissionDefault() == null) {
+            // Permission requirement exists but no default value specified.
+            undefinedPermissions.add(command.permission());
+        }
+    }
+
+    @Override
+    protected void onRegisterPermissions(GeyserRegisterPermissionsEvent event) {
+        super.onRegisterPermissions(event);
+
+        // SECOND STAGE
+        // Now that we are aware of all commands, we can eliminate some incorrect assumptions.
+        // Example: two commands may have the same permission, but only of them defines a permission default.
+        undefinedPermissions.removeAll(permissionDefaults.keySet());
+    }
+
+    /**
+     * Registers permissions with possibly undefined defaults.
+     * Should be subscribed late to allow extensions and mods to register a desired permission default first.
+     */
+    void onPermissionGatherForUndefined(PermissionGatherEvent.Nodes event) {
+        // THIRD STAGE
+        for (String permission : undefinedPermissions) {
+            if (PermissionUtils.register(permission, TriState.NOT_SET, event)) {
+                // The permission was not already registered
+                geyser.getLogger().debug("Registered permission " + permission + " with fallback default value of NOT_SET");
+            }
+        }
+    }
+
+    @Override
+    public boolean hasPermission(GeyserCommandSource source, String permission) {
+        // NeoForgeServerCommandManager will throw this exception if the permission is not registered to the server.
+        // We can't realistically ensure that every permission is registered (calls by API users), so we catch this.
+        // This works for our calls, but not for cloud's internal usage. For that case, see above.
+        try {
+            return super.hasPermission(source, permission);
+        } catch (PermissionNotRegisteredException e) {
+            return false;
+        }
+    }
+}

bootstrap/mod/neoforge/src/main/java/org/geysermc/geyser/platform/neoforge/GeyserNeoForgePermissionHandler.java

@@ -1,149 +0,0 @@
-/*
- * Copyright (c) 2019-2023 GeyserMC. http://geysermc.org
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- *
- * @author GeyserMC
- * @link https://github.com/GeyserMC/Geyser
- */
-
-package org.geysermc.geyser.platform.neoforge;
-
-import net.minecraft.commands.CommandSourceStack;
-import net.minecraft.server.level.ServerPlayer;
-import net.minecraft.world.entity.player.Player;
-import net.neoforged.neoforge.server.permission.PermissionAPI;
-import net.neoforged.neoforge.server.permission.events.PermissionGatherEvent;
-import net.neoforged.neoforge.server.permission.nodes.PermissionDynamicContextKey;
-import net.neoforged.neoforge.server.permission.nodes.PermissionNode;
-import net.neoforged.neoforge.server.permission.nodes.PermissionType;
-import net.neoforged.neoforge.server.permission.nodes.PermissionTypes;
-import org.checkerframework.checker.nullness.qual.NonNull;
-import org.geysermc.geyser.Constants;
-import org.geysermc.geyser.GeyserImpl;
-import org.geysermc.geyser.api.command.Command;
-import org.geysermc.geyser.command.GeyserCommandManager;
-
-import java.lang.reflect.Constructor;
-import java.util.HashMap;
-import java.util.Map;
-
-public class GeyserNeoForgePermissionHandler {
-
-    private static final Constructor<?> PERMISSION_NODE_CONSTRUCTOR;
-
-    static {
-        try {
-            @SuppressWarnings("rawtypes")
-            Constructor<PermissionNode> constructor = PermissionNode.class.getDeclaredConstructor(
-                    String.class,
-                    PermissionType.class,
-                    PermissionNode.PermissionResolver.class,
-                    PermissionDynamicContextKey[].class
-            );
-            constructor.setAccessible(true);
-            PERMISSION_NODE_CONSTRUCTOR = constructor;
-        } catch (NoSuchMethodException e) {
-            throw new RuntimeException("Unable to construct PermissionNode!", e);
-        }
-    }
-
-    private final Map<String, PermissionNode<Boolean>> permissionNodes = new HashMap<>();
-
-    public void onPermissionGather(PermissionGatherEvent.Nodes event) {
-        this.registerNode(Constants.UPDATE_PERMISSION, event);
-
-        GeyserCommandManager commandManager = GeyserImpl.getInstance().commandManager();
-        for (Map.Entry<String, Command> entry : commandManager.commands().entrySet()) {
-            Command command = entry.getValue();
-
-            // Don't register aliases
-            if (!command.name().equals(entry.getKey())) {
-                continue;
-            }
-
-            this.registerNode(command.permission(), event);
-        }
-
-        for (Map<String, Command> commands : commandManager.extensionCommands().values()) {
-            for (Map.Entry<String, Command> entry : commands.entrySet()) {
-                Command command = entry.getValue();
-
-                // Don't register aliases
-                if (!command.name().equals(entry.getKey())) {
-                    continue;
-                }
-
-                this.registerNode(command.permission(), event);
-            }
-        }
-    }
-
-    public boolean hasPermission(@NonNull Player source, @NonNull String permissionNode) {
-        PermissionNode<Boolean> node = this.permissionNodes.get(permissionNode);
-        if (node == null) {
-            GeyserImpl.getInstance().getLogger().warning("Unable to find permission node " + permissionNode);
-            return false;
-        }
-
-        return PermissionAPI.getPermission((ServerPlayer) source, node);
-    }
-
-    public boolean hasPermission(@NonNull CommandSourceStack source, @NonNull String permissionNode, int permissionLevel) {
-        if (!source.isPlayer()) {
-            return true;
-        }
-        assert source.getPlayer() != null;
-        boolean permission = this.hasPermission(source.getPlayer(), permissionNode);
-        if (!permission) {
-            return source.getPlayer().hasPermissions(permissionLevel);
-        }
-
-        return true;
-    }
-
-    private void registerNode(String node, PermissionGatherEvent.Nodes event) {
-        PermissionNode<Boolean> permissionNode = this.createNode(node);
-
-        // NeoForge likes to crash if you try and register a duplicate node
-        if (!event.getNodes().contains(permissionNode)) {
-            event.addNodes(permissionNode);
-            this.permissionNodes.put(node, permissionNode);
-        }
-    }
-
-    @SuppressWarnings("unchecked")
-    private PermissionNode<Boolean> createNode(String node) {
-        // The typical constructors in PermissionNode require a
-        // mod id, which means our permission nodes end up becoming
-        // geyser_neoforge.<node> instead of just <node>. We work around
-        // this by using reflection to access the constructor that
-        // doesn't require a mod id or ResourceLocation.
-        try {
-            return (PermissionNode<Boolean>) PERMISSION_NODE_CONSTRUCTOR.newInstance(
-                    node,
-                    PermissionTypes.BOOLEAN,
-                    (PermissionNode.PermissionResolver<Boolean>) (player, playerUUID, context) -> false,
-                    new PermissionDynamicContextKey[0]
-            );
-        } catch (Exception e) {
-            throw new RuntimeException("Unable to create permission node " + node, e);
-        }
-    }
-}

bootstrap/mod/neoforge/src/main/java/org/geysermc/geyser/platform/neoforge/PermissionUtils.java

@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2024 GeyserMC. http://geysermc.org
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @author GeyserMC
+ * @link https://github.com/GeyserMC/Geyser
+ */
+
+package org.geysermc.geyser.platform.neoforge;
+
+import net.neoforged.neoforge.server.permission.events.PermissionGatherEvent;
+import net.neoforged.neoforge.server.permission.nodes.PermissionNode;
+import net.neoforged.neoforge.server.permission.nodes.PermissionTypes;
+import org.geysermc.geyser.api.event.lifecycle.GeyserRegisterPermissionsEvent;
+import org.geysermc.geyser.api.util.TriState;
+import org.geysermc.geyser.platform.neoforge.mixin.PermissionNodeMixin;
+
+/**
+ * Common logic for handling the more complicated way we have to register permission on NeoForge
+ */
+public class PermissionUtils {
+
+    private PermissionUtils() {
+        //no
+    }
+
+    /**
+     * Registers the given permission and its default value to the event. If the permission has the same name as one
+     * that has already been registered to the event, it will not be registered. In other words, it will not override.
+     *
+     * @param permission the permission to register
+     * @param permissionDefault the permission's default value. See {@link GeyserRegisterPermissionsEvent#register(String, TriState)} for TriState meanings.
+     * @param event the registration event
+     * @return true if the permission was registered
+     */
+    public static boolean register(String permission, TriState permissionDefault, PermissionGatherEvent.Nodes event) {
+        // NeoForge likes to crash if you try and register a duplicate node
+        if (event.getNodes().stream().noneMatch(n -> n.getNodeName().equals(permission))) {
+            PermissionNode<Boolean> node = createNode(permission, permissionDefault);
+            event.addNodes(node);
+            return true;
+        }
+        return false;
+    }
+
+    private static PermissionNode<Boolean> createNode(String node, TriState permissionDefault) {
+        return PermissionNodeMixin.geyser$construct(
+            node,
+            PermissionTypes.BOOLEAN,
+            (player, playerUUID, context) -> switch (permissionDefault) {
+                case TRUE -> true;
+                case FALSE -> false;
+                case NOT_SET -> {
+                    if (player != null) {
+                        yield player.createCommandSourceStack().hasPermission(player.server.getOperatorUserPermissionLevel());
+                    }
+                    yield false; // NeoForge javadocs say player is null in the case of an offline player.
+                }
+            }
+        );
+    }
+}

bootstrap/mod/neoforge/src/main/java/org/geysermc/geyser/platform/neoforge/mixin/PermissionNodeMixin.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2019-2024 GeyserMC. http://geysermc.org
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @author GeyserMC
+ * @link https://github.com/GeyserMC/Geyser
+ */
+
+package org.geysermc.geyser.platform.neoforge.mixin;
+
+import net.neoforged.neoforge.server.permission.nodes.PermissionDynamicContextKey;
+import net.neoforged.neoforge.server.permission.nodes.PermissionNode;
+import net.neoforged.neoforge.server.permission.nodes.PermissionType;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.gen.Invoker;
+
+@Mixin(value = PermissionNode.class, remap = false) // this is API - do not remap
+public interface PermissionNodeMixin {
+
+    /**
+     * Invokes the matching private constructor in {@link PermissionNode}.
+     * <p>
+     * The typical constructors in PermissionNode require a mod id, which means our permission nodes
+     * would end up becoming {@code geyser_neoforge.<node>} instead of just {@code <node>}.
+     */
+    @SuppressWarnings("rawtypes") // the varargs
+    @Invoker("<init>")
+    static <T> PermissionNode<T> geyser$construct(String nodeName, PermissionType<T> type, PermissionNode.PermissionResolver<T> defaultResolver, PermissionDynamicContextKey... dynamics) {
+        throw new IllegalStateException();
+    }
+}

bootstrap/mod/neoforge/src/main/resources/META-INF/neoforge.mods.toml

@@ -11,6 +11,8 @@ authors="GeyserMC"
 description="${description}"
 [[mixins]]
 config = "geyser.mixins.json"
+[[mixins]]
+config = "geyser_neoforge.mixins.json"
 [[dependencies.geyser_neoforge]]
     modId="neoforge"
     type="required"

bootstrap/mod/neoforge/src/main/resources/geyser_neoforge.mixins.json

@@ -0,0 +1,12 @@
+{
+  "required": true,
+  "minVersion": "0.8",
+  "package": "org.geysermc.geyser.platform.neoforge.mixin",
+  "compatibilityLevel": "JAVA_17",
+  "mixins": [
+    "PermissionNodeMixin"
+  ],
+  "injectors": {
+    "defaultRequire": 1
+  }
+}

bootstrap/mod/src/main/java/org/geysermc/geyser/platform/mod/GeyserModBootstrap.java

@@ -25,30 +25,21 @@
 
 package org.geysermc.geyser.platform.mod;
 
-import com.mojang.brigadier.arguments.StringArgumentType;
-import com.mojang.brigadier.builder.LiteralArgumentBuilder;
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
 import lombok.Setter;
-import net.minecraft.commands.CommandSourceStack;
-import net.minecraft.commands.Commands;
 import net.minecraft.server.MinecraftServer;
-import net.minecraft.world.entity.player.Player;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.geysermc.geyser.GeyserBootstrap;
 import org.geysermc.geyser.GeyserImpl;
 import org.geysermc.geyser.GeyserLogger;
-import org.geysermc.geyser.api.command.Command;
+import org.geysermc.geyser.command.CommandRegistry;
-import org.geysermc.geyser.api.extension.Extension;
-import org.geysermc.geyser.command.GeyserCommand;
-import org.geysermc.geyser.command.GeyserCommandManager;
 import org.geysermc.geyser.configuration.GeyserConfiguration;
 import org.geysermc.geyser.dump.BootstrapDumpInfo;
 import org.geysermc.geyser.level.WorldManager;
 import org.geysermc.geyser.ping.GeyserLegacyPingPassthrough;
 import org.geysermc.geyser.ping.IGeyserPingPassthrough;
-import org.geysermc.geyser.platform.mod.command.GeyserModCommandExecutor;
 import org.geysermc.geyser.platform.mod.platform.GeyserModPlatform;
 import org.geysermc.geyser.platform.mod.world.GeyserModWorldManager;
 import org.geysermc.geyser.text.GeyserLocale;
@@ -59,7 +50,6 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.net.SocketAddress;
 import java.nio.file.Path;
-import java.util.Map;
 import java.util.UUID;
 
 @RequiredArgsConstructor
@@ -70,13 +60,15 @@ public abstract class GeyserModBootstrap implements GeyserBootstrap {
 
     private final GeyserModPlatform platform;
 
+    @Getter
     private GeyserImpl geyser;
     private Path dataFolder;
 
-    @Setter
+    @Setter @Getter
     private MinecraftServer server;
 
-    private GeyserCommandManager geyserCommandManager;
+    @Setter
+    private CommandRegistry commandRegistry;
     private GeyserModConfiguration geyserConfig;
     private GeyserModInjector geyserInjector;
     private final GeyserModLogger geyserLogger = new GeyserModLogger();
@@ -94,10 +86,6 @@ public abstract class GeyserModBootstrap implements GeyserBootstrap {
         this.geyserLogger.setDebug(geyserConfig.isDebugMode());
         GeyserConfiguration.checkGeyserConfiguration(geyserConfig, geyserLogger);
         this.geyser = GeyserImpl.load(this.platform.platformType(), this);
-
-        // Create command manager here, since the permission handler on neo needs it
-        this.geyserCommandManager = new GeyserCommandManager(geyser);
-        this.geyserCommandManager.init();
     }
 
     public void onGeyserEnable() {
@@ -130,50 +118,6 @@ public abstract class GeyserModBootstrap implements GeyserBootstrap {
         if (isServer()) {
             this.geyserInjector.initializeLocalChannel(this);
         }
-
-        // Start command building
-        // Set just "geyser" as the help command
-        GeyserModCommandExecutor helpExecutor = new GeyserModCommandExecutor(geyser,
-                (GeyserCommand) geyser.commandManager().getCommands().get("help"));
-        LiteralArgumentBuilder<CommandSourceStack> builder = Commands.literal("geyser").executes(helpExecutor);
-
-        // Register all subcommands as valid
-        for (Map.Entry<String, Command> command : geyser.commandManager().getCommands().entrySet()) {
-            GeyserModCommandExecutor executor = new GeyserModCommandExecutor(geyser, (GeyserCommand) command.getValue());
-            builder.then(Commands.literal(command.getKey())
-                    .executes(executor)
-                    // Could also test for Bedrock but depending on when this is called it may backfire
-                    .requires(executor::testPermission)
-                    // Allows parsing of arguments; e.g. for /geyser dump logs or the connectiontest command
-                    .then(Commands.argument("args", StringArgumentType.greedyString())
-                            .executes(context -> executor.runWithArgs(context, StringArgumentType.getString(context, "args")))
-                            .requires(executor::testPermission)));
-        }
-        server.getCommands().getDispatcher().register(builder);
-
-        // Register extension commands
-        for (Map.Entry<Extension, Map<String, Command>> extensionMapEntry : geyser.commandManager().extensionCommands().entrySet()) {
-            Map<String, Command> extensionCommands = extensionMapEntry.getValue();
-            if (extensionCommands.isEmpty()) {
-                continue;
-            }
-
-            // Register help command for just "/<extensionId>"
-            GeyserModCommandExecutor extensionHelpExecutor = new GeyserModCommandExecutor(geyser,
-                    (GeyserCommand) extensionCommands.get("help"));
-            LiteralArgumentBuilder<CommandSourceStack> extCmdBuilder = Commands.literal(extensionMapEntry.getKey().description().id()).executes(extensionHelpExecutor);
-
-            for (Map.Entry<String, Command> command : extensionCommands.entrySet()) {
-                GeyserModCommandExecutor executor = new GeyserModCommandExecutor(geyser, (GeyserCommand) command.getValue());
-                extCmdBuilder.then(Commands.literal(command.getKey())
-                        .executes(executor)
-                        .requires(executor::testPermission)
-                        .then(Commands.argument("args", StringArgumentType.greedyString())
-                                .executes(context -> executor.runWithArgs(context, StringArgumentType.getString(context, "args")))
-                                .requires(executor::testPermission)));
-            }
-            server.getCommands().getDispatcher().register(extCmdBuilder);
-        }
     }
 
     @Override
@@ -206,8 +150,8 @@ public abstract class GeyserModBootstrap implements GeyserBootstrap {
     }
 
     @Override
-    public GeyserCommandManager getGeyserCommandManager() {
+    public CommandRegistry getCommandRegistry() {
-        return geyserCommandManager;
+        return commandRegistry;
     }
 
     @Override
@@ -235,6 +179,7 @@ public abstract class GeyserModBootstrap implements GeyserBootstrap {
         return this.server.getServerVersion();
     }
 
+    @SuppressWarnings("ConstantConditions") // Certain IDEA installations think that ip cannot be null
     @NonNull
     @Override
     public String getServerBindAddress() {
@@ -270,10 +215,6 @@ public abstract class GeyserModBootstrap implements GeyserBootstrap {
         return this.platform.resolveResource(resource);
     }
 
-    public abstract boolean hasPermission(@NonNull Player source, @NonNull String permissionNode);
-
-    public abstract boolean hasPermission(@NonNull CommandSourceStack source, @NonNull String permissionNode, int permissionLevel);
-
     @SuppressWarnings("BooleanMethodIsAlwaysInverted")
     private boolean loadConfig() {
         try {

bootstrap/mod/src/main/java/org/geysermc/geyser/platform/mod/GeyserModUpdateListener.java

@@ -25,17 +25,18 @@
 
 package org.geysermc.geyser.platform.mod;
 
-import net.minecraft.commands.CommandSourceStack;
 import net.minecraft.world.entity.player.Player;
-import org.geysermc.geyser.Constants;
+import org.geysermc.geyser.Permissions;
-import org.geysermc.geyser.platform.mod.command.ModCommandSender;
+import org.geysermc.geyser.platform.mod.command.ModCommandSource;
 import org.geysermc.geyser.util.VersionCheckUtils;
 
 public final class GeyserModUpdateListener {
     public static void onPlayReady(Player player) {
-        CommandSourceStack stack = player.createCommandSourceStack();
+        // Should be creating this in the supplier, but we need it for the permission check.
-        if (GeyserModBootstrap.getInstance().hasPermission(stack, Constants.UPDATE_PERMISSION, 2)) {
+        // Not a big deal currently because ModCommandSource doesn't load locale, so don't need to try to wait for it.
-            VersionCheckUtils.checkForGeyserUpdate(() -> new ModCommandSender(stack));
+        ModCommandSource source = new ModCommandSource(player.createCommandSourceStack());
+        if (source.hasPermission(Permissions.CHECK_UPDATE)) {
+            VersionCheckUtils.checkForGeyserUpdate(() -> source);
         }
     }
 

bootstrap/mod/src/main/java/org/geysermc/geyser/platform/mod/command/GeyserModCommandExecutor.java

@@ -1,75 +0,0 @@
-/*
- * Copyright (c) 2019-2022 GeyserMC. http://geysermc.org
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- *
- * @author GeyserMC
- * @link https://github.com/GeyserMC/Geyser
- */
-
-package org.geysermc.geyser.platform.mod.command;
-
-import com.mojang.brigadier.Command;
-import com.mojang.brigadier.context.CommandContext;
-import net.minecraft.commands.CommandSourceStack;
-import org.geysermc.geyser.GeyserImpl;
-import org.geysermc.geyser.command.GeyserCommand;
-import org.geysermc.geyser.command.GeyserCommandExecutor;
-import org.geysermc.geyser.platform.mod.GeyserModBootstrap;
-import org.geysermc.geyser.session.GeyserSession;
-import org.geysermc.geyser.text.ChatColor;
-import org.geysermc.geyser.text.GeyserLocale;
-
-import java.util.Collections;
-
-public class GeyserModCommandExecutor extends GeyserCommandExecutor implements Command<CommandSourceStack> {
-    private final GeyserCommand command;
-
-    public GeyserModCommandExecutor(GeyserImpl geyser, GeyserCommand command) {
-        super(geyser, Collections.singletonMap(command.name(), command));
-        this.command = command;
-    }
-
-    public boolean testPermission(CommandSourceStack source) {
-        return GeyserModBootstrap.getInstance().hasPermission(source, command.permission(), command.isSuggestedOpOnly() ? 2 : 0);
-    }
-
-    @Override
-    public int run(CommandContext<CommandSourceStack> context) {
-        return runWithArgs(context, "");
-    }
-
-    public int runWithArgs(CommandContext<CommandSourceStack> context, String args) {
-        CommandSourceStack source = context.getSource();
-        ModCommandSender sender = new ModCommandSender(source);
-        GeyserSession session = getGeyserSession(sender);
-        if (!testPermission(source)) {
-            sender.sendMessage(ChatColor.RED + GeyserLocale.getPlayerLocaleString("geyser.bootstrap.command.permission_fail", sender.locale()));
-            return 0;
-        }
-
-        if (command.isBedrockOnly() && session == null) {
-            sender.sendMessage(ChatColor.RED + GeyserLocale.getPlayerLocaleString("geyser.bootstrap.command.bedrock_only", sender.locale()));
-            return 0;
-        }
-
-        command.execute(session, sender, args.split(" "));
-        return 0;
-    }
-}

bootstrap/mod/src/main/java/org/geysermc/geyser/platform/mod/command/ModCommandSource.java

@@ -31,19 +31,21 @@ import net.minecraft.core.RegistryAccess;
 import net.minecraft.network.chat.Component;
 import net.minecraft.server.level.ServerPlayer;
 import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.checker.nullness.qual.Nullable;
 import org.geysermc.geyser.GeyserImpl;
 import org.geysermc.geyser.command.GeyserCommandSource;
-import org.geysermc.geyser.platform.mod.GeyserModBootstrap;
 import org.geysermc.geyser.text.ChatColor;
 
 import java.util.Objects;
+import java.util.UUID;
 
-public class ModCommandSender implements GeyserCommandSource {
+public class ModCommandSource implements GeyserCommandSource {
 
     private final CommandSourceStack source;
 
-    public ModCommandSender(CommandSourceStack source) {
+    public ModCommandSource(CommandSourceStack source) {
         this.source = source;
+        // todo find locale?
     }
 
     @Override
@@ -75,8 +77,24 @@ public class ModCommandSender implements GeyserCommandSource {
         return !(source.getEntity() instanceof ServerPlayer);
     }
 
+    @Override
+    public @Nullable UUID playerUuid() {
+        if (source.getEntity() instanceof ServerPlayer player) {
+            return player.getUUID();
+        }
+        return null;
+    }
+
     @Override
     public boolean hasPermission(String permission) {
-        return GeyserModBootstrap.getInstance().hasPermission(source, permission, source.getServer().getOperatorUserPermissionLevel());
+        // Unlike other bootstraps; we delegate to cloud here too:
+        // On NeoForge; we'd have to keep track of all PermissionNodes - cloud already does that
+        // For Fabric, we won't need to include the Fabric Permissions API anymore - cloud already does that too :p
+        return GeyserImpl.getInstance().commandRegistry().hasPermission(this, permission);
+    }
+
+    @Override
+    public Object handle() {
+        return source;
     }
 }

bootstrap/mod/src/main/java/org/geysermc/geyser/platform/mod/mixin/server/PistonBaseBlockMixin.java

@@ -0,0 +1,127 @@
+/*
+ * Copyright (c) 2024 GeyserMC. http://geysermc.org
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @author GeyserMC
+ * @link https://github.com/GeyserMC/Geyser
+ */
+
+package org.geysermc.geyser.platform.mod.mixin.server;
+
+import com.llamalad7.mixinextras.injector.ModifyExpressionValue;
+import com.llamalad7.mixinextras.sugar.Share;
+import com.llamalad7.mixinextras.sugar.ref.LocalRef;
+import it.unimi.dsi.fastutil.objects.Object2ObjectArrayMap;
+import it.unimi.dsi.fastutil.objects.Object2ObjectMap;
+import net.minecraft.core.BlockPos;
+import net.minecraft.core.Direction;
+import net.minecraft.world.entity.player.Player;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.level.block.Block;
+import net.minecraft.world.level.block.piston.PistonBaseBlock;
+import net.minecraft.world.level.block.state.BlockState;
+import org.cloudburstmc.math.vector.Vector3i;
+import org.geysermc.geyser.GeyserImpl;
+import org.geysermc.geyser.session.GeyserSession;
+import org.geysermc.geyser.session.cache.PistonCache;
+import org.geysermc.geyser.translator.level.block.entity.PistonBlockEntity;
+import org.geysermc.mcprotocollib.protocol.data.game.level.block.value.PistonValueType;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.Unique;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.UUID;
+
+@Mixin(PistonBaseBlock.class)
+public class PistonBaseBlockMixin {
+
+    @Shadow
+    @Final
+    private boolean isSticky;
+
+    @ModifyExpressionValue(method = "moveBlocks",
+        at = @At(value = "INVOKE", target = "Lcom/google/common/collect/Maps;newHashMap()Ljava/util/HashMap;")
+    )
+    private HashMap<BlockPos, BlockState> geyser$onMapCreate(HashMap<BlockPos, BlockState> original, @Share("pushBlocks") LocalRef<Map<BlockPos, BlockState>> localRef) {
+        localRef.set(original);
+        return original;
+    }
+
+    @Inject(method = "moveBlocks",
+        at = @At(value = "INVOKE", target = "Lnet/minecraft/world/level/block/piston/PistonStructureResolver;getToDestroy()Ljava/util/List;")
+    )
+    private void geyser$onBlocksMove(Level level, BlockPos blockPos, Direction direction, boolean isExtending, CallbackInfoReturnable<Boolean> cir, @Share("pushBlocks") LocalRef<Map<BlockPos, BlockState>> localRef) {
+        PistonValueType type = isExtending ? PistonValueType.PUSHING : PistonValueType.PULLING;
+        boolean sticky = this.isSticky;
+
+        Object2ObjectMap<Vector3i, org.geysermc.geyser.level.block.type.BlockState> attachedBlocks = new Object2ObjectArrayMap<>();
+        boolean blocksFilled = false;
+
+        for (Map.Entry<UUID, GeyserSession> entry : GeyserImpl.getInstance().getSessionManager().getSessions().entrySet()) {
+            Player player = level.getPlayerByUUID(entry.getKey());
+            //noinspection resource
+            if (player == null || !player.level().equals(level)) {
+                continue;
+            }
+            GeyserSession session = entry.getValue();
+
+            int dX = Math.abs(blockPos.getX() - player.getBlockX()) >> 4;
+            int dZ = Math.abs(blockPos.getZ() - player.getBlockZ()) >> 4;
+            if ((dX * dX + dZ * dZ) > session.getServerRenderDistance() * session.getServerRenderDistance()) {
+                // Ignore pistons outside the player's render distance
+                continue;
+            }
+
+            // Trying to grab the blocks from the world like other platforms would result in the moving piston block
+            // being returned instead.
+            if (!blocksFilled) {
+                Map<BlockPos, net.minecraft.world.level.block.state.BlockState> blocks = localRef.get();
+                for (Map.Entry<BlockPos, BlockState> blockStateEntry : blocks.entrySet()) {
+                    int blockStateId = Block.BLOCK_STATE_REGISTRY.getId(blockStateEntry.getValue());
+                    org.geysermc.geyser.level.block.type.BlockState state = org.geysermc.geyser.level.block.type.BlockState.of(blockStateId);
+                    attachedBlocks.put(geyser$fromBlockPos(blockStateEntry.getKey()), state);
+                }
+                blocksFilled = true;
+            }
+
+            org.geysermc.geyser.level.physics.Direction orientation = org.geysermc.geyser.level.physics.Direction.VALUES[direction.ordinal()];
+
+            Vector3i position = geyser$fromBlockPos(blockPos);
+            session.executeInEventLoop(() -> {
+                PistonCache pistonCache = session.getPistonCache();
+                PistonBlockEntity blockEntity = pistonCache.getPistons().computeIfAbsent(position, pos ->
+                    new PistonBlockEntity(session, position, orientation, sticky, !isExtending));
+                blockEntity.setAction(type, attachedBlocks);
+            });
+        }
+    }
+
+    @Unique
+    private static Vector3i geyser$fromBlockPos(BlockPos pos) {
+        return Vector3i.from(pos.getX(), pos.getY(), pos.getZ());
+    }
+
+}

bootstrap/mod/src/main/java/org/geysermc/geyser/platform/mod/world/GeyserModWorldManager.java

@@ -49,7 +49,6 @@ import org.checkerframework.checker.nullness.qual.NonNull;
 import org.cloudburstmc.math.vector.Vector3i;
 import org.geysermc.geyser.level.GeyserWorldManager;
 import org.geysermc.geyser.network.GameProtocol;
-import org.geysermc.geyser.platform.mod.GeyserModBootstrap;
 import org.geysermc.geyser.session.GeyserSession;
 import org.geysermc.geyser.util.MinecraftKey;
 import org.geysermc.mcprotocollib.protocol.data.game.Holder;
@@ -113,12 +112,6 @@ public class GeyserModWorldManager extends GeyserWorldManager {
         return SharedConstants.getCurrentVersion().getProtocolVersion() == GameProtocol.getJavaProtocolVersion();
     }
 
-    @Override
-    public boolean hasPermission(GeyserSession session, String permission) {
-        ServerPlayer player = getPlayer(session);
-        return GeyserModBootstrap.getInstance().hasPermission(player, permission);
-    }
-
     @Override
     public GameMode getDefaultGameMode(GeyserSession session) {
         return GameMode.byId(server.getDefaultGameType().getId());

bootstrap/mod/src/main/resources/geyser.mixins.json

@@ -5,6 +5,7 @@
   "compatibilityLevel": "JAVA_17",
   "mixins": [
     "server.BlockPlaceMixin",
+    "server.PistonBaseBlockMixin",
     "server.ServerConnectionListenerMixin"
   ],
   "server": [

bootstrap/spigot/build.gradle.kts

@@ -17,12 +17,12 @@ dependencies {
         classifier("all") // otherwise the unshaded jar is used without the shaded NMS implementations
     })
 
+    implementation(libs.cloud.paper)
     implementation(libs.commodore)
 
     implementation(libs.adventure.text.serializer.bungeecord)
 
     compileOnly(libs.folia.api)
-    compileOnly(libs.paper.mojangapi)
 
     compileOnlyApi(libs.viaversion)
 }
@@ -33,13 +33,15 @@ platformRelocate("com.fasterxml.jackson")
 platformRelocate("net.kyori", "net.kyori.adventure.text.logger.slf4j.ComponentLogger")
 platformRelocate("org.objectweb.asm")
 platformRelocate("me.lucko.commodore")
+platformRelocate("org.incendo")
+platformRelocate("io.leangen.geantyref") // provided by cloud, should also be relocated
 platformRelocate("org.yaml") // Broken as of 1.20
 
 // These dependencies are already present on the platform
 provided(libs.viaversion)
 
-application {
+tasks.withType<Jar> {
-    mainClass.set("org.geysermc.geyser.platform.spigot.GeyserSpigotMain")
+    manifest.attributes["Main-Class"] = "org.geysermc.geyser.platform.spigot.GeyserSpigotMain"
 }
 
 tasks.withType<com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar> {

bootstrap/spigot/src/main/java/org/geysermc/geyser/platform/spigot/GeyserSpigotPlugin.java

@@ -30,37 +30,34 @@ import com.viaversion.viaversion.api.data.MappingData;
 import com.viaversion.viaversion.api.protocol.ProtocolPathEntry;
 import com.viaversion.viaversion.api.protocol.version.ProtocolVersion;
 import io.netty.buffer.ByteBuf;
-import me.lucko.commodore.CommodoreProvider;
 import org.bukkit.Bukkit;
 import org.bukkit.block.data.BlockData;
-import org.bukkit.command.CommandMap;
+import org.bukkit.command.CommandSender;
-import org.bukkit.command.PluginCommand;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.Listener;
 import org.bukkit.event.server.ServerLoadEvent;
 import org.bukkit.permissions.Permission;
 import org.bukkit.permissions.PermissionDefault;
-import org.bukkit.plugin.Plugin;
+import org.bukkit.plugin.PluginManager;
 import org.bukkit.plugin.java.JavaPlugin;
 import org.checkerframework.checker.nullness.qual.NonNull;
-import org.geysermc.geyser.Constants;
 import org.geysermc.geyser.GeyserBootstrap;
 import org.geysermc.geyser.GeyserImpl;
 import org.geysermc.geyser.adapters.paper.PaperAdapters;
 import org.geysermc.geyser.adapters.spigot.SpigotAdapters;
-import org.geysermc.geyser.api.command.Command;
+import org.geysermc.geyser.api.event.lifecycle.GeyserRegisterPermissionsEvent;
-import org.geysermc.geyser.api.extension.Extension;
 import org.geysermc.geyser.api.util.PlatformType;
-import org.geysermc.geyser.command.GeyserCommandManager;
+import org.geysermc.geyser.command.CommandRegistry;
+import org.geysermc.geyser.command.CommandSourceConverter;
+import org.geysermc.geyser.command.GeyserCommandSource;
 import org.geysermc.geyser.configuration.GeyserConfiguration;
 import org.geysermc.geyser.dump.BootstrapDumpInfo;
 import org.geysermc.geyser.level.WorldManager;
 import org.geysermc.geyser.network.GameProtocol;
 import org.geysermc.geyser.ping.GeyserLegacyPingPassthrough;
 import org.geysermc.geyser.ping.IGeyserPingPassthrough;
-import org.geysermc.geyser.platform.spigot.command.GeyserBrigadierSupport;
+import org.geysermc.geyser.platform.spigot.command.SpigotCommandRegistry;
-import org.geysermc.geyser.platform.spigot.command.GeyserSpigotCommandExecutor;
+import org.geysermc.geyser.platform.spigot.command.SpigotCommandSource;
-import org.geysermc.geyser.platform.spigot.command.GeyserSpigotCommandManager;
 import org.geysermc.geyser.platform.spigot.world.GeyserPistonListener;
 import org.geysermc.geyser.platform.spigot.world.GeyserSpigotBlockPlaceListener;
 import org.geysermc.geyser.platform.spigot.world.manager.GeyserSpigotLegacyNativeWorldManager;
@@ -68,21 +65,21 @@ import org.geysermc.geyser.platform.spigot.world.manager.GeyserSpigotNativeWorld
 import org.geysermc.geyser.platform.spigot.world.manager.GeyserSpigotWorldManager;
 import org.geysermc.geyser.text.GeyserLocale;
 import org.geysermc.geyser.util.FileUtils;
+import org.incendo.cloud.bukkit.BukkitCommandManager;
+import org.incendo.cloud.execution.ExecutionCoordinator;
+import org.incendo.cloud.paper.LegacyPaperCommandManager;
 
 import java.io.File;
 import java.io.IOException;
-import java.lang.reflect.Constructor;
-import java.lang.reflect.InvocationTargetException;
 import java.net.SocketAddress;
 import java.nio.file.Path;
 import java.util.List;
-import java.util.Map;
 import java.util.Objects;
 import java.util.UUID;
 
 public class GeyserSpigotPlugin extends JavaPlugin implements GeyserBootstrap {
 
-    private GeyserSpigotCommandManager geyserCommandManager;
+    private CommandRegistry commandRegistry;
     private GeyserSpigotConfiguration geyserConfig;
     private GeyserSpigotInjector geyserInjector;
     private final GeyserSpigotLogger geyserLogger = GeyserPaperLogger.supported() ?
@@ -165,31 +162,37 @@ public class GeyserSpigotPlugin extends JavaPlugin implements GeyserBootstrap {
 
     @Override
     public void onEnable() {
-        this.geyserCommandManager = new GeyserSpigotCommandManager(geyser);
+        // Create command manager early so we can add Geyser extension commands
-        this.geyserCommandManager.init();
+        var sourceConverter = new CommandSourceConverter<>(
-
+                CommandSender.class,
-        // Because Bukkit locks its command map upon startup, we need to
+                Bukkit::getPlayer,
-        // add our plugin commands in onEnable, but populating the executor
+                Bukkit::getConsoleSender,
-        // can happen at any time (later in #onGeyserEnable())
+                SpigotCommandSource::new
-        CommandMap commandMap = GeyserSpigotCommandManager.getCommandMap();
+        );
-        for (Extension extension : this.geyserCommandManager.extensionCommands().keySet()) {
+        LegacyPaperCommandManager<GeyserCommandSource> cloud;
-            // Thanks again, Bukkit
         try {
-                Constructor<PluginCommand> constructor = PluginCommand.class.getDeclaredConstructor(String.class, Plugin.class);
+            // LegacyPaperCommandManager works for spigot too, see https://cloud.incendo.org/minecraft/paper
-                constructor.setAccessible(true);
+            cloud = new LegacyPaperCommandManager<>(
-
+                    this,
-                PluginCommand pluginCommand = constructor.newInstance(extension.description().id(), this);
+                    ExecutionCoordinator.simpleCoordinator(),
-                pluginCommand.setDescription("The main command for the " + extension.name() + " Geyser extension!");
+                    sourceConverter
-
+            );
-                commandMap.register(extension.description().id(), "geyserext", pluginCommand);
+        } catch (Exception e) {
-            } catch (InstantiationException | IllegalAccessException | InvocationTargetException | NoSuchMethodException ex) {
+            throw new RuntimeException(e);
-                this.geyserLogger.error("Failed to construct PluginCommand for extension " + extension.name(), ex);
         }
+
+        try {
+            // Commodore brigadier on Spigot/Paper 1.13 - 1.18.2
+            // Paper-only brigadier on 1.19+
+            cloud.registerBrigadier();
+        } catch (BukkitCommandManager.BrigadierInitializationException e) {
+            geyserLogger.debug("Failed to initialize Brigadier support: " + e.getMessage());
         }
 
+        this.commandRegistry = new SpigotCommandRegistry(geyser, cloud);
+
         // Needs to be an anonymous inner class otherwise Bukkit complains about missing classes
         Bukkit.getPluginManager().registerEvents(new Listener() {
-
             @EventHandler
             public void onServerLoaded(ServerLoadEvent event) {
                 if (event.getType() == ServerLoadEvent.LoadType.RELOAD) {
@@ -227,7 +230,7 @@ public class GeyserSpigotPlugin extends JavaPlugin implements GeyserBootstrap {
         }
         geyserLogger.debug("Spigot ping passthrough type: " + (this.geyserSpigotPingPassthrough == null ? null : this.geyserSpigotPingPassthrough.getClass()));
 
-        // Don't need to re-create the world manager/re-register commands/reinject when reloading
+        // Don't need to re-create the world manager/reinject when reloading
         if (GeyserImpl.getInstance().isReloading()) {
             return;
         }
@@ -282,79 +285,40 @@ public class GeyserSpigotPlugin extends JavaPlugin implements GeyserBootstrap {
             geyserLogger.debug("Using default world manager.");
         }
 
-        PluginCommand geyserCommand = this.getCommand("geyser");
-        Objects.requireNonNull(geyserCommand, "base command cannot be null");
-        geyserCommand.setExecutor(new GeyserSpigotCommandExecutor(geyser, geyserCommandManager.getCommands()));
-
-        for (Map.Entry<Extension, Map<String, Command>> entry : this.geyserCommandManager.extensionCommands().entrySet()) {
-            Map<String, Command> commands = entry.getValue();
-            if (commands.isEmpty()) {
-                continue;
-            }
-
-            PluginCommand command = this.getCommand(entry.getKey().description().id());
-            if (command == null) {
-                continue;
-            }
-
-            command.setExecutor(new GeyserSpigotCommandExecutor(this.geyser, commands));
-        }
-
         // Register permissions so they appear in, for example, LuckPerms' UI
-        // Re-registering permissions throws an error
+        // Re-registering permissions without removing it throws an error
-        for (Map.Entry<String, Command> entry : geyserCommandManager.commands().entrySet()) {
+        PluginManager pluginManager = Bukkit.getPluginManager();
-            Command command = entry.getValue();
+        geyser.eventBus().fire((GeyserRegisterPermissionsEvent) (permission, def) -> {
-            if (command.aliases().contains(entry.getKey())) {
+            Objects.requireNonNull(permission, "permission");
-                // Don't register aliases
+            Objects.requireNonNull(def, "permission default for " + permission);
-                continue;
+
+            if (permission.isBlank()) {
+                return;
+            }
+            PermissionDefault permissionDefault = switch (def) {
+                case TRUE -> PermissionDefault.TRUE;
+                case FALSE -> PermissionDefault.FALSE;
+                case NOT_SET -> PermissionDefault.OP;
+            };
+
+            Permission existingPermission = pluginManager.getPermission(permission);
+            if (existingPermission != null) {
+                geyserLogger.debug("permission " + permission + " with default " +
+                        existingPermission.getDefault() + " is being overridden by " + permissionDefault);
+
+                pluginManager.removePermission(permission);
             }
 
-            Bukkit.getPluginManager().addPermission(new Permission(command.permission(),
+            pluginManager.addPermission(new Permission(permission, permissionDefault));
-                    GeyserLocale.getLocaleStringLog(command.description()),
+        });
-                    command.isSuggestedOpOnly() ? PermissionDefault.OP : PermissionDefault.TRUE));
-        }
-
-        // Register permissions for extension commands
-        for (Map.Entry<Extension, Map<String, Command>> commandEntry : this.geyserCommandManager.extensionCommands().entrySet()) {
-            for (Map.Entry<String, Command> entry : commandEntry.getValue().entrySet()) {
-                Command command = entry.getValue();
-                if (command.aliases().contains(entry.getKey())) {
-                    // Don't register aliases
-                    continue;
-                }
-
-                if (command.permission().isBlank()) {
-                    continue;
-                }
-
-                // Avoid registering the same permission twice, e.g. for the extension help commands
-                if (Bukkit.getPluginManager().getPermission(command.permission()) != null) {
-                    GeyserImpl.getInstance().getLogger().debug("Skipping permission " + command.permission() + " as it is already registered");
-                    continue;
-                }
-
-                Bukkit.getPluginManager().addPermission(new Permission(command.permission(),
-                        GeyserLocale.getLocaleStringLog(command.description()),
-                        command.isSuggestedOpOnly() ? PermissionDefault.OP : PermissionDefault.TRUE));
-            }
-        }
-
-        Bukkit.getPluginManager().addPermission(new Permission(Constants.UPDATE_PERMISSION,
-                "Whether update notifications can be seen", PermissionDefault.OP));
 
         // Events cannot be unregistered - re-registering results in duplicate firings
         GeyserSpigotBlockPlaceListener blockPlaceListener = new GeyserSpigotBlockPlaceListener(geyser, this.geyserWorldManager);
-        Bukkit.getServer().getPluginManager().registerEvents(blockPlaceListener, this);
+        pluginManager.registerEvents(blockPlaceListener, this);
 
-        Bukkit.getServer().getPluginManager().registerEvents(new GeyserPistonListener(geyser, this.geyserWorldManager), this);
+        pluginManager.registerEvents(new GeyserPistonListener(geyser, this.geyserWorldManager), this);
 
-        Bukkit.getServer().getPluginManager().registerEvents(new GeyserSpigotUpdateListener(), this);
+        pluginManager.registerEvents(new GeyserSpigotUpdateListener(), this);
-
-        boolean brigadierSupported = CommodoreProvider.isSupported();
-        geyserLogger.debug("Brigadier supported? " + brigadierSupported);
-        if (brigadierSupported) {
-            GeyserBrigadierSupport.loadBrigadier(this, geyserCommand);
-        }
     }
 
     @Override
@@ -390,8 +354,8 @@ public class GeyserSpigotPlugin extends JavaPlugin implements GeyserBootstrap {
     }
 
     @Override
-    public GeyserCommandManager getGeyserCommandManager() {
+    public CommandRegistry getCommandRegistry() {
-        return this.geyserCommandManager;
+        return this.commandRegistry;
     }
 
     @Override

bootstrap/spigot/src/main/java/org/geysermc/geyser/platform/spigot/GeyserSpigotUpdateListener.java

@@ -29,8 +29,8 @@ import org.bukkit.entity.Player;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.Listener;
 import org.bukkit.event.player.PlayerJoinEvent;
-import org.geysermc.geyser.Constants;
 import org.geysermc.geyser.GeyserImpl;
+import org.geysermc.geyser.Permissions;
 import org.geysermc.geyser.platform.spigot.command.SpigotCommandSource;
 import org.geysermc.geyser.util.VersionCheckUtils;
 
@@ -40,7 +40,7 @@ public final class GeyserSpigotUpdateListener implements Listener {
     public void onPlayerJoin(final PlayerJoinEvent event) {
         if (GeyserImpl.getInstance().getConfig().isNotifyOnNewBedrockUpdate()) {
             final Player player = event.getPlayer();
-            if (player.hasPermission(Constants.UPDATE_PERMISSION)) {
+            if (player.hasPermission(Permissions.CHECK_UPDATE)) {
                 VersionCheckUtils.checkForGeyserUpdate(() -> new SpigotCommandSource(player));
             }
         }

bootstrap/spigot/src/main/java/org/geysermc/geyser/platform/spigot/command/GeyserBrigadierSupport.java

@@ -1,61 +0,0 @@
-/*
- * Copyright (c) 2019-2022 GeyserMC. http://geysermc.org
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- *
- * @author GeyserMC
- * @link https://github.com/GeyserMC/Geyser
- */
-
-package org.geysermc.geyser.platform.spigot.command;
-
-import com.mojang.brigadier.builder.LiteralArgumentBuilder;
-import me.lucko.commodore.Commodore;
-import me.lucko.commodore.CommodoreProvider;
-import org.bukkit.Bukkit;
-import org.bukkit.command.PluginCommand;
-import org.geysermc.geyser.platform.spigot.GeyserSpigotPlugin;
-
-/**
- * Needs to be a separate class so pre-1.13 loads correctly.
- */
-public final class GeyserBrigadierSupport {
-
-    public static void loadBrigadier(GeyserSpigotPlugin plugin, PluginCommand pluginCommand) {
-        // Enable command completions if supported
-        // This is beneficial because this is sent over the network and Bedrock can see it
-        Commodore commodore = CommodoreProvider.getCommodore(plugin);
-        LiteralArgumentBuilder<?> builder = LiteralArgumentBuilder.literal("geyser");
-        for (String command : plugin.getGeyserCommandManager().getCommands().keySet()) {
-            builder.then(LiteralArgumentBuilder.literal(command));
-        }
-        commodore.register(pluginCommand, builder);
-
-        try {
-            Class.forName("com.destroystokyo.paper.event.brigadier.AsyncPlayerSendCommandsEvent");
-            Bukkit.getServer().getPluginManager().registerEvents(new GeyserPaperCommandListener(), plugin);
-            plugin.getGeyserLogger().debug("Successfully registered AsyncPlayerSendCommandsEvent listener.");
-        } catch (ClassNotFoundException e) {
-            plugin.getGeyserLogger().debug("Not registering AsyncPlayerSendCommandsEvent listener.");
-        }
-    }
-
-    private GeyserBrigadierSupport() {
-    }
-}

bootstrap/spigot/src/main/java/org/geysermc/geyser/platform/spigot/command/GeyserPaperCommandListener.java

@@ -1,87 +0,0 @@
-/*
- * Copyright (c) 2019-2022 GeyserMC. http://geysermc.org
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- *
- * @author GeyserMC
- * @link https://github.com/GeyserMC/Geyser
- */
-
-package org.geysermc.geyser.platform.spigot.command;
-
-import com.destroystokyo.paper.event.brigadier.AsyncPlayerSendCommandsEvent;
-import com.mojang.brigadier.tree.CommandNode;
-import org.bukkit.entity.Player;
-import org.bukkit.event.EventHandler;
-import org.bukkit.event.Listener;
-import org.geysermc.geyser.GeyserImpl;
-import org.geysermc.geyser.api.command.Command;
-
-import java.net.InetSocketAddress;
-import java.util.Iterator;
-import java.util.Map;
-
-public final class GeyserPaperCommandListener implements Listener {
-
-    @SuppressWarnings("UnstableApiUsage")
-    @EventHandler
-    public void onCommandSend(AsyncPlayerSendCommandsEvent<?> event) {
-        // Documentation says to check (event.isAsynchronous() || !event.hasFiredAsync()), but as of Paper 1.18.2
-        // event.hasFiredAsync is never true
-        if (event.isAsynchronous()) {
-            CommandNode<?> geyserBrigadier = event.getCommandNode().getChild("geyser");
-            if (geyserBrigadier != null) {
-                Player player = event.getPlayer();
-                boolean isJavaPlayer = isProbablyJavaPlayer(player);
-                Map<String, Command> commands = GeyserImpl.getInstance().commandManager().getCommands();
-                Iterator<? extends CommandNode<?>> it = geyserBrigadier.getChildren().iterator();
-
-                while (it.hasNext()) {
-                    CommandNode<?> subnode = it.next();
-                    Command command = commands.get(subnode.getName());
-                    if (command != null) {
-                        if ((command.isBedrockOnly() && isJavaPlayer) || !player.hasPermission(command.permission())) {
-                            // Remove this from the node as we don't have permission to use it
-                            it.remove();
-                        }
-                    }
-                }
-            }
-        }
-    }
-
-    /**
-     * This early on, there is a rare chance that Geyser has yet to process the connection. We'll try to minimize that
-     * chance, though.
-     */
-    private boolean isProbablyJavaPlayer(Player player) {
-        if (GeyserImpl.getInstance().connectionByUuid(player.getUniqueId()) != null) {
-            // For sure this is a Bedrock player
-            return false;
-        }
-
-        if (GeyserImpl.getInstance().getConfig().isUseDirectConnection()) {
-            InetSocketAddress address = player.getAddress();
-            if (address != null) {
-                return address.getPort() != 0;
-            }
-        }
-        return true;
-    }
-}

bootstrap/spigot/src/main/java/org/geysermc/geyser/platform/spigot/command/GeyserSpigotCommandExecutor.java

@@ -1,88 +0,0 @@
-/*
- * Copyright (c) 2019-2022 GeyserMC. http://geysermc.org
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- *
- * @author GeyserMC
- * @link https://github.com/GeyserMC/Geyser
- */
-
-package org.geysermc.geyser.platform.spigot.command;
-
-import org.bukkit.ChatColor;
-import org.bukkit.command.Command;
-import org.bukkit.command.CommandSender;
-import org.bukkit.command.TabExecutor;
-import org.checkerframework.checker.nullness.qual.NonNull;
-import org.geysermc.geyser.GeyserImpl;
-import org.geysermc.geyser.command.GeyserCommand;
-import org.geysermc.geyser.command.GeyserCommandExecutor;
-import org.geysermc.geyser.session.GeyserSession;
-import org.geysermc.geyser.text.GeyserLocale;
-
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.List;
-import java.util.Map;
-
-public class GeyserSpigotCommandExecutor extends GeyserCommandExecutor implements TabExecutor {
-
-    public GeyserSpigotCommandExecutor(GeyserImpl geyser, Map<String, org.geysermc.geyser.api.command.Command> commands) {
-        super(geyser, commands);
-    }
-
-    @Override
-    public boolean onCommand(@NonNull CommandSender sender, @NonNull Command command, @NonNull String label, String[] args) {
-        SpigotCommandSource commandSender = new SpigotCommandSource(sender);
-        GeyserSession session = getGeyserSession(commandSender);
-
-        if (args.length > 0) {
-            GeyserCommand geyserCommand = getCommand(args[0]);
-            if (geyserCommand != null) {
-                if (!sender.hasPermission(geyserCommand.permission())) {
-                    String message = GeyserLocale.getPlayerLocaleString("geyser.bootstrap.command.permission_fail", commandSender.locale());
-
-                    commandSender.sendMessage(ChatColor.RED + message);
-                    return true;
-                }
-                if (geyserCommand.isBedrockOnly() && session == null) {
-                    sender.sendMessage(ChatColor.RED + GeyserLocale.getPlayerLocaleString("geyser.bootstrap.command.bedrock_only", commandSender.locale()));
-                    return true;
-                }
-                geyserCommand.execute(session, commandSender, args.length > 1 ? Arrays.copyOfRange(args, 1, args.length) : new String[0]);
-                return true;
-            } else {
-                String message = GeyserLocale.getPlayerLocaleString("geyser.bootstrap.command.not_found", commandSender.locale());
-                commandSender.sendMessage(ChatColor.RED + message);
-            }
-        } else {
-            getCommand("help").execute(session, commandSender, new String[0]);
-            return true;
-        }
-        return true;
-    }
-
-    @Override
-    public List<String> onTabComplete(@NonNull CommandSender sender, @NonNull Command command, @NonNull String label, String[] args) {
-        if (args.length == 1) {
-            return tabComplete(new SpigotCommandSource(sender));
-        }
-        return Collections.emptyList();
-    }
-}

bootstrap/spigot/src/main/java/org/geysermc/geyser/platform/spigot/command/SpigotCommandRegistry.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019-2022 GeyserMC. http://geysermc.org
+ * Copyright (c) 2019-2023 GeyserMC. http://geysermc.org
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -29,16 +29,21 @@ import org.bukkit.Bukkit;
 import org.bukkit.Server;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandMap;
+import org.checkerframework.checker.nullness.qual.NonNull;
 import org.geysermc.geyser.GeyserImpl;
-import org.geysermc.geyser.command.GeyserCommandManager;
+import org.geysermc.geyser.command.CommandRegistry;
+import org.geysermc.geyser.command.GeyserCommandSource;
+import org.incendo.cloud.CommandManager;
 
 import java.lang.reflect.Field;
 
-public class GeyserSpigotCommandManager extends GeyserCommandManager {
+public class SpigotCommandRegistry extends CommandRegistry {
 
-    private static final CommandMap COMMAND_MAP;
+    private final CommandMap commandMap;
+
+    public SpigotCommandRegistry(GeyserImpl geyser, CommandManager<GeyserCommandSource> cloud) {
+        super(geyser, cloud);
 
-    static {
         CommandMap commandMap = null;
         try {
             // Paper-only
@@ -49,24 +54,28 @@ public class GeyserSpigotCommandManager extends GeyserCommandManager {
                 Field cmdMapField = Bukkit.getServer().getClass().getDeclaredField("commandMap");
                 cmdMapField.setAccessible(true);
                 commandMap = (CommandMap) cmdMapField.get(Bukkit.getServer());
-            } catch (NoSuchFieldException | IllegalAccessException ex) {
+            } catch (Exception ex) {
-                ex.printStackTrace();
+                geyser.getLogger().error("Failed to get Spigot's CommandMap", ex);
             }
         }
-        COMMAND_MAP = commandMap;
+        this.commandMap = commandMap;
-    }
-
-    public GeyserSpigotCommandManager(GeyserImpl geyser) {
-        super(geyser);
     }
 
+    @NonNull
     @Override
-    public String description(String command) {
+    public String description(@NonNull String command, @NonNull String locale) {
-        Command cmd = COMMAND_MAP.getCommand(command.replace("/", ""));
+        // check if the command is /geyser or an extension command so that we can localize the description
-        return cmd != null ? cmd.getDescription() : "";
+        String description = super.description(command, locale);
+        if (!description.isBlank()) {
+            return description;
         }
 
-    public static CommandMap getCommandMap() {
+        if (commandMap != null) {
-        return COMMAND_MAP;
+            Command cmd = commandMap.getCommand(command);
+            if (cmd != null) {
+                return cmd.getDescription();
+            }
+        }
+        return "";
     }
 }

bootstrap/spigot/src/main/java/org/geysermc/geyser/platform/spigot/command/SpigotCommandSource.java

@@ -27,17 +27,21 @@ package org.geysermc.geyser.platform.spigot.command;
 
 import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.serializer.bungeecord.BungeeComponentSerializer;
+import org.bukkit.command.CommandSender;
 import org.bukkit.command.ConsoleCommandSender;
 import org.bukkit.entity.Player;
 import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.checker.nullness.qual.Nullable;
 import org.geysermc.geyser.command.GeyserCommandSource;
 import org.geysermc.geyser.platform.spigot.PaperAdventure;
 import org.geysermc.geyser.text.GeyserLocale;
 
-public class SpigotCommandSource implements GeyserCommandSource {
+import java.util.UUID;
-    private final org.bukkit.command.CommandSender handle;
 
-    public SpigotCommandSource(org.bukkit.command.CommandSender handle) {
+public class SpigotCommandSource implements GeyserCommandSource {
+    private final CommandSender handle;
+
+    public SpigotCommandSource(CommandSender handle) {
         this.handle = handle;
         // Ensure even Java players' languages are loaded
         GeyserLocale.loadGeyserLocale(locale());
@@ -65,11 +69,24 @@ public class SpigotCommandSource implements GeyserCommandSource {
         handle.spigot().sendMessage(BungeeComponentSerializer.get().serialize(message));
     }
 
+    @Override
+    public Object handle() {
+        return handle;
+    }
+
     @Override
     public boolean isConsole() {
         return handle instanceof ConsoleCommandSender;
     }
 
+    @Override
+    public @Nullable UUID playerUuid() {
+        if (handle instanceof Player player) {
+            return player.getUniqueId();
+        }
+        return null;
+    }
+
     @SuppressWarnings("deprecation")
     @Override
     public String locale() {
@@ -83,6 +100,7 @@ public class SpigotCommandSource implements GeyserCommandSource {
 
     @Override
     public boolean hasPermission(String permission) {
-        return handle.hasPermission(permission);
+        // Don't trust Spigot to handle blank permissions
+        return permission.isBlank() || handle.hasPermission(permission);
     }
 }

bootstrap/spigot/src/main/java/org/geysermc/geyser/platform/spigot/world/manager/GeyserSpigotWorldManager.java

@@ -128,15 +128,6 @@ public class GeyserSpigotWorldManager extends WorldManager {
         return GameMode.byId(Bukkit.getDefaultGameMode().ordinal());
     }
 
-    @Override
-    public boolean hasPermission(GeyserSession session, String permission) {
-        Player player = Bukkit.getPlayer(session.javaUuid());
-        if (player != null) {
-            return player.hasPermission(permission);
-        }
-        return false;
-    }
-
     @Override
     public @NonNull CompletableFuture<@Nullable DataComponents> getPickItemComponents(GeyserSession session, int x, int y, int z, boolean addNbtData) {
         Player bukkitPlayer;

bootstrap/spigot/src/main/resources/plugin.yml

@@ -6,11 +6,3 @@ version: ${version}
 softdepend: ["ViaVersion", "floodgate"]
 api-version: 1.13
 folia-supported: true
-commands:
-  geyser:
-    description: The main command for Geyser.
-    usage: /geyser <subcommand>
-    permission: geyser.command
-permissions:
-  geyser.command:
-    default: true

bootstrap/standalone/build.gradle.kts

@@ -1,5 +1,9 @@
 import com.github.jengelman.gradle.plugins.shadow.transformers.Log4j2PluginsCacheFileTransformer
 
+plugins {
+    application
+}
+
 val terminalConsoleVersion = "1.2.0"
 val jlineVersion = "3.21.0"
 

bootstrap/standalone/src/main/java/org/geysermc/geyser/platform/standalone/GeyserStandaloneBootstrap.java

@@ -42,7 +42,8 @@ import org.checkerframework.checker.nullness.qual.NonNull;
 import org.geysermc.geyser.GeyserBootstrap;
 import org.geysermc.geyser.GeyserImpl;
 import org.geysermc.geyser.api.util.PlatformType;
-import org.geysermc.geyser.command.GeyserCommandManager;
+import org.geysermc.geyser.command.CommandRegistry;
+import org.geysermc.geyser.command.standalone.StandaloneCloudCommandManager;
 import org.geysermc.geyser.configuration.GeyserConfiguration;
 import org.geysermc.geyser.configuration.GeyserJacksonConfiguration;
 import org.geysermc.geyser.dump.BootstrapDumpInfo;
@@ -69,7 +70,8 @@ import java.util.stream.Collectors;
 
 public class GeyserStandaloneBootstrap implements GeyserBootstrap {
 
-    private GeyserCommandManager geyserCommandManager;
+    private StandaloneCloudCommandManager cloud;
+    private CommandRegistry commandRegistry;
     private GeyserStandaloneConfiguration geyserConfig;
     private final GeyserStandaloneLogger geyserLogger = new GeyserStandaloneLogger();
     private IGeyserPingPassthrough geyserPingPassthrough;
@@ -222,13 +224,24 @@ public class GeyserStandaloneBootstrap implements GeyserBootstrap {
 
         geyser = GeyserImpl.load(PlatformType.STANDALONE, this);
 
-        geyserCommandManager = new GeyserCommandManager(geyser);
+        boolean reloading = geyser.isReloading();
-        geyserCommandManager.init();
+        if (!reloading) {
+            // Currently there would be no significant benefit of re-initializing commands. Also, we would have to unsubscribe CommandRegistry.
+            // Fire GeyserDefineCommandsEvent after PreInitEvent, before PostInitEvent, for consistency with other bootstraps.
+            cloud = new StandaloneCloudCommandManager(geyser);
+            commandRegistry = new CommandRegistry(geyser, cloud);
+        }
 
         GeyserImpl.start();
 
+        if (!reloading) {
+            // Event must be fired after CommandRegistry has subscribed its listener.
+            // Also, the subscription for the Permissions class is created when Geyser is initialized.
+            cloud.fireRegisterPermissionsEvent();
+        }
+
         if (gui != null) {
-            gui.enableCommands(geyser.getScheduledThread(), geyserCommandManager);
+            gui.enableCommands(geyser.getScheduledThread(), commandRegistry);
         }
 
         geyserPingPassthrough = GeyserLegacyPingPassthrough.init(geyser);
@@ -255,8 +268,6 @@ public class GeyserStandaloneBootstrap implements GeyserBootstrap {
 
     @Override
     public void onGeyserDisable() {
-        // We can re-register commands on standalone, so why not
-        GeyserImpl.getInstance().commandManager().getCommands().clear();
         geyser.disable();
     }
 
@@ -277,8 +288,8 @@ public class GeyserStandaloneBootstrap implements GeyserBootstrap {
     }
 
     @Override
-    public GeyserCommandManager getGeyserCommandManager() {
+    public CommandRegistry getCommandRegistry() {
-        return geyserCommandManager;
+        return commandRegistry;
     }
 
     @Override

bootstrap/standalone/src/main/java/org/geysermc/geyser/platform/standalone/GeyserStandaloneLogger.java

@@ -44,7 +44,9 @@ public class GeyserStandaloneLogger extends SimpleTerminalConsole implements Gey
 
     @Override
     protected void runCommand(String line) {
-        GeyserImpl.getInstance().commandManager().runCommand(this, line);
+        // don't block the terminal!
+        GeyserImpl geyser = GeyserImpl.getInstance();
+        geyser.getScheduledThread().execute(() -> geyser.commandRegistry().runCommand(this, line));
     }
 
     @Override

bootstrap/standalone/src/main/java/org/geysermc/geyser/platform/standalone/gui/GeyserStandaloneGUI.java

@@ -28,7 +28,7 @@ package org.geysermc.geyser.platform.standalone.gui;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.geysermc.geyser.GeyserImpl;
 import org.geysermc.geyser.GeyserLogger;
-import org.geysermc.geyser.command.GeyserCommandManager;
+import org.geysermc.geyser.command.CommandRegistry;
 import org.geysermc.geyser.session.GeyserSession;
 import org.geysermc.geyser.text.GeyserLocale;
 
@@ -271,15 +271,14 @@ public class GeyserStandaloneGUI {
     }
 
     /**
-     * Enable the command input box.
+     * Enables the command input box.
      *
-     * @param executor the executor for running commands off the GUI thread
+     * @param executor the executor that commands will be run on
-     * @param commandManager the command manager to delegate commands to
+     * @param registry the command registry containing all current commands
      */
-    public void enableCommands(ScheduledExecutorService executor, GeyserCommandManager commandManager) {
+    public void enableCommands(ScheduledExecutorService executor, CommandRegistry registry) {
         // we don't want to block the GUI thread with the command execution
-        // todo: once cloud is used, an AsynchronousCommandExecutionCoordinator can be used to avoid this scheduler
+        commandListener.dispatcher = cmd -> executor.execute(() -> registry.runCommand(logger, cmd));
-        commandListener.handler = cmd -> executor.schedule(() -> commandManager.runCommand(logger, cmd), 0, TimeUnit.SECONDS);
         commandInput.setEnabled(true);
         commandInput.requestFocusInWindow();
     }
@@ -344,13 +343,14 @@ public class GeyserStandaloneGUI {
 
     private class CommandListener implements ActionListener {
 
-        private Consumer<String> handler;
+        private Consumer<String> dispatcher;
 
         @Override
         public void actionPerformed(ActionEvent e) {
-            String command = commandInput.getText();
+            // the headless variant of Standalone strips trailing whitespace for us - we need to manually
+            String command = commandInput.getText().stripTrailing();
             appendConsole(command + "\n"); // show what was run in the console
-            handler.accept(command); // run the command
+            dispatcher.accept(command); // run the command
             commandInput.setText(""); // clear the input
         }
     }

bootstrap/velocity/build.gradle.kts

@@ -3,12 +3,15 @@ dependencies {
     api(projects.core)
 
     compileOnlyApi(libs.velocity.api)
+    api(libs.cloud.velocity)
 }
 
 platformRelocate("com.fasterxml.jackson")
 platformRelocate("it.unimi.dsi.fastutil")
 platformRelocate("net.kyori.adventure.text.serializer.gson.legacyimpl")
 platformRelocate("org.yaml")
+platformRelocate("org.incendo")
+platformRelocate("io.leangen.geantyref") // provided by cloud, should also be relocated
 
 exclude("com.google.*:*")
 
@@ -38,8 +41,8 @@ exclude("net.kyori:adventure-nbt:*")
 // These dependencies are already present on the platform
 provided(libs.velocity.api)
 
-application {
+tasks.withType<Jar> {
-    mainClass.set("org.geysermc.geyser.platform.velocity.GeyserVelocityMain")
+    manifest.attributes["Main-Class"] = "org.geysermc.geyser.platform.velocity.GeyserVelocityMain"
 }
 
 tasks.withType<com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar> {

bootstrap/velocity/src/main/java/org/geysermc/geyser/platform/velocity/GeyserVelocityPlugin.java

@@ -26,7 +26,7 @@
 package org.geysermc.geyser.platform.velocity;
 
 import com.google.inject.Inject;
-import com.velocitypowered.api.command.CommandManager;
+import com.velocitypowered.api.command.CommandSource;
 import com.velocitypowered.api.event.Subscribe;
 import com.velocitypowered.api.event.proxy.ListenerBoundEvent;
 import com.velocitypowered.api.event.proxy.ProxyInitializeEvent;
@@ -34,24 +34,28 @@ import com.velocitypowered.api.event.proxy.ProxyShutdownEvent;
 import com.velocitypowered.api.network.ListenerType;
 import com.velocitypowered.api.network.ProtocolVersion;
 import com.velocitypowered.api.plugin.Plugin;
+import com.velocitypowered.api.plugin.PluginContainer;
 import com.velocitypowered.api.proxy.ProxyServer;
 import lombok.Getter;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.geysermc.geyser.GeyserBootstrap;
 import org.geysermc.geyser.GeyserImpl;
-import org.geysermc.geyser.api.command.Command;
-import org.geysermc.geyser.api.extension.Extension;
 import org.geysermc.geyser.api.util.PlatformType;
-import org.geysermc.geyser.command.GeyserCommandManager;
+import org.geysermc.geyser.command.CommandRegistry;
+import org.geysermc.geyser.command.CommandSourceConverter;
+import org.geysermc.geyser.command.GeyserCommandSource;
 import org.geysermc.geyser.configuration.GeyserConfiguration;
 import org.geysermc.geyser.dump.BootstrapDumpInfo;
 import org.geysermc.geyser.network.GameProtocol;
 import org.geysermc.geyser.ping.GeyserLegacyPingPassthrough;
 import org.geysermc.geyser.ping.IGeyserPingPassthrough;
-import org.geysermc.geyser.platform.velocity.command.GeyserVelocityCommandExecutor;
+import org.geysermc.geyser.platform.velocity.command.VelocityCommandSource;
 import org.geysermc.geyser.text.GeyserLocale;
 import org.geysermc.geyser.util.FileUtils;
+import org.incendo.cloud.CommandManager;
+import org.incendo.cloud.execution.ExecutionCoordinator;
+import org.incendo.cloud.velocity.VelocityCommandManager;
 import org.slf4j.Logger;
 
 import java.io.File;
@@ -59,29 +63,28 @@ import java.io.IOException;
 import java.net.SocketAddress;
 import java.nio.file.Path;
 import java.nio.file.Paths;
-import java.util.Map;
 import java.util.UUID;
 
 @Plugin(id = "geyser", name = GeyserImpl.NAME + "-Velocity", version = GeyserImpl.VERSION, url = "https://geysermc.org", authors = "GeyserMC")
 public class GeyserVelocityPlugin implements GeyserBootstrap {
 
     private final ProxyServer proxyServer;
-    private final CommandManager commandManager;
+    private final PluginContainer container;
     private final GeyserVelocityLogger geyserLogger;
-    private GeyserCommandManager geyserCommandManager;
     private GeyserVelocityConfiguration geyserConfig;
     private GeyserVelocityInjector geyserInjector;
     private IGeyserPingPassthrough geyserPingPassthrough;
+    private CommandRegistry commandRegistry;
     private GeyserImpl geyser;
 
     @Getter
     private final Path configFolder = Paths.get("plugins/" + GeyserImpl.NAME + "-Velocity/");
 
     @Inject
-    public GeyserVelocityPlugin(ProxyServer server, Logger logger, CommandManager manager) {
+    public GeyserVelocityPlugin(ProxyServer server, PluginContainer container, Logger logger) {
-        this.geyserLogger = new GeyserVelocityLogger(logger);
         this.proxyServer = server;
-        this.commandManager = manager;
+        this.container = container;
+        this.geyserLogger = new GeyserVelocityLogger(logger);
     }
 
     @Override
@@ -117,8 +120,19 @@ public class GeyserVelocityPlugin implements GeyserBootstrap {
             this.geyserLogger.setDebug(geyserConfig.isDebugMode());
             GeyserConfiguration.checkGeyserConfiguration(geyserConfig, geyserLogger);
         } else {
-            this.geyserCommandManager = new GeyserCommandManager(geyser);
+            var sourceConverter = new CommandSourceConverter<>(
-            this.geyserCommandManager.init();
+                    CommandSource.class,
+                    id -> proxyServer.getPlayer(id).orElse(null),
+                    proxyServer::getConsoleCommandSource,
+                    VelocityCommandSource::new
+            );
+            CommandManager<GeyserCommandSource> cloud = new VelocityCommandManager<>(
+                    container,
+                    proxyServer,
+                    ExecutionCoordinator.simpleCoordinator(),
+                    sourceConverter
+            );
+            this.commandRegistry = new CommandRegistry(geyser, cloud, false); // applying root permission would be a breaking change because we can't register permission defaults
         }
 
         GeyserImpl.start();
@@ -129,23 +143,11 @@ public class GeyserVelocityPlugin implements GeyserBootstrap {
             this.geyserPingPassthrough = new GeyserVelocityPingPassthrough(proxyServer);
         }
 
-        // No need to re-register commands when reloading
+        // No need to re-register events
-        if (GeyserImpl.getInstance().isReloading()) {
+        if (!GeyserImpl.getInstance().isReloading()) {
-            return;
-        }
-
-        this.commandManager.register("geyser", new GeyserVelocityCommandExecutor(geyser, geyserCommandManager.getCommands()));
-        for (Map.Entry<Extension, Map<String, Command>> entry : this.geyserCommandManager.extensionCommands().entrySet()) {
-            Map<String, Command> commands = entry.getValue();
-            if (commands.isEmpty()) {
-                continue;
-            }
-
-            this.commandManager.register(entry.getKey().description().id(), new GeyserVelocityCommandExecutor(this.geyser, commands));
-        }
-
             proxyServer.getEventManager().register(this, new GeyserVelocityUpdateListener());
         }
+    }
 
     @Override
     public void onGeyserDisable() {
@@ -175,8 +177,8 @@ public class GeyserVelocityPlugin implements GeyserBootstrap {
     }
 
     @Override
-    public GeyserCommandManager getGeyserCommandManager() {
+    public CommandRegistry getCommandRegistry() {
-        return this.geyserCommandManager;
+        return this.commandRegistry;
     }
 
     @Override

bootstrap/velocity/src/main/java/org/geysermc/geyser/platform/velocity/GeyserVelocityUpdateListener.java

@@ -28,8 +28,8 @@ package org.geysermc.geyser.platform.velocity;
 import com.velocitypowered.api.event.Subscribe;
 import com.velocitypowered.api.event.connection.PostLoginEvent;
 import com.velocitypowered.api.proxy.Player;
-import org.geysermc.geyser.Constants;
 import org.geysermc.geyser.GeyserImpl;
+import org.geysermc.geyser.Permissions;
 import org.geysermc.geyser.platform.velocity.command.VelocityCommandSource;
 import org.geysermc.geyser.util.VersionCheckUtils;
 
@@ -39,7 +39,7 @@ public final class GeyserVelocityUpdateListener {
     public void onPlayerJoin(PostLoginEvent event) {
         if (GeyserImpl.getInstance().getConfig().isNotifyOnNewBedrockUpdate()) {
             final Player player = event.getPlayer();
-            if (player.hasPermission(Constants.UPDATE_PERMISSION)) {
+            if (player.hasPermission(Permissions.CHECK_UPDATE)) {
                 VersionCheckUtils.checkForGeyserUpdate(() -> new VelocityCommandSource(player));
             }
         }

bootstrap/velocity/src/main/java/org/geysermc/geyser/platform/velocity/command/GeyserVelocityCommandExecutor.java

@@ -1,83 +0,0 @@
-/*
- * Copyright (c) 2019-2022 GeyserMC. http://geysermc.org
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- *
- * @author GeyserMC
- * @link https://github.com/GeyserMC/Geyser
- */
-
-package org.geysermc.geyser.platform.velocity.command;
-
-import com.velocitypowered.api.command.SimpleCommand;
-import org.geysermc.geyser.GeyserImpl;
-import org.geysermc.geyser.api.command.Command;
-import org.geysermc.geyser.command.GeyserCommand;
-import org.geysermc.geyser.command.GeyserCommandExecutor;
-import org.geysermc.geyser.command.GeyserCommandSource;
-import org.geysermc.geyser.session.GeyserSession;
-import org.geysermc.geyser.text.ChatColor;
-import org.geysermc.geyser.text.GeyserLocale;
-
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.List;
-import java.util.Map;
-
-public class GeyserVelocityCommandExecutor extends GeyserCommandExecutor implements SimpleCommand {
-
-    public GeyserVelocityCommandExecutor(GeyserImpl geyser, Map<String, Command> commands) {
-        super(geyser, commands);
-    }
-
-    @Override
-    public void execute(Invocation invocation) {
-        GeyserCommandSource sender = new VelocityCommandSource(invocation.source());
-        GeyserSession session = getGeyserSession(sender);
-
-        if (invocation.arguments().length > 0) {
-            GeyserCommand command = getCommand(invocation.arguments()[0]);
-            if (command != null) {
-                if (!invocation.source().hasPermission(getCommand(invocation.arguments()[0]).permission())) {
-                    sender.sendMessage(ChatColor.RED + GeyserLocale.getPlayerLocaleString("geyser.bootstrap.command.permission_fail", sender.locale()));
-                    return;
-                }
-                if (command.isBedrockOnly() && session == null) {
-                    sender.sendMessage(ChatColor.RED + GeyserLocale.getPlayerLocaleString("geyser.bootstrap.command.bedrock_only", sender.locale()));
-                    return;
-                }
-                command.execute(session, sender, invocation.arguments().length > 1 ? Arrays.copyOfRange(invocation.arguments(), 1, invocation.arguments().length) : new String[0]);
-            } else {
-                String message = GeyserLocale.getPlayerLocaleString("geyser.bootstrap.command.not_found", sender.locale());
-                sender.sendMessage(ChatColor.RED + message);
-            }
-        } else {
-            getCommand("help").execute(session, sender, new String[0]);
-        }
-    }
-
-    @Override
-    public List<String> suggest(Invocation invocation) {
-        // Velocity seems to do the splitting a bit differently. This results in the same behaviour in bungeecord/spigot.
-        if (invocation.arguments().length == 0 || invocation.arguments().length == 1) {
-            return tabComplete(new VelocityCommandSource(invocation.source()));
-        }
-        return Collections.emptyList();
-    }
-}

bootstrap/velocity/src/main/java/org/geysermc/geyser/platform/velocity/command/VelocityCommandSource.java

@@ -31,10 +31,12 @@ import com.velocitypowered.api.proxy.Player;
 import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer;
 import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.checker.nullness.qual.Nullable;
 import org.geysermc.geyser.command.GeyserCommandSource;
 import org.geysermc.geyser.text.GeyserLocale;
 
 import java.util.Locale;
+import java.util.UUID;
 
 public class VelocityCommandSource implements GeyserCommandSource {
 
@@ -72,6 +74,14 @@ public class VelocityCommandSource implements GeyserCommandSource {
         return handle instanceof ConsoleCommandSource;
     }
 
+    @Override
+    public @Nullable UUID playerUuid() {
+        if (handle instanceof Player player) {
+            return player.getUniqueId();
+        }
+        return null;
+    }
+
     @Override
     public String locale() {
         if (handle instanceof Player) {
@@ -83,6 +93,12 @@ public class VelocityCommandSource implements GeyserCommandSource {
 
     @Override
     public boolean hasPermission(String permission) {
-        return handle.hasPermission(permission);
+        // Handle blank permissions ourselves, as velocity only handles empty ones
+        return permission.isBlank() || handle.hasPermission(permission);
+    }
+
+    @Override
+    public Object handle() {
+        return handle;
     }
 }

bootstrap/viaproxy/build.gradle.kts

@@ -8,12 +8,14 @@ platformRelocate("net.kyori")
 platformRelocate("org.yaml")
 platformRelocate("it.unimi.dsi.fastutil")
 platformRelocate("org.cloudburstmc.netty")
+platformRelocate("org.incendo")
+platformRelocate("io.leangen.geantyref") // provided by cloud, should also be relocated
 
 // These dependencies are already present on the platform
 provided(libs.viaproxy)
 
-application {
+tasks.withType<Jar> {
-    mainClass.set("org.geysermc.geyser.platform.viaproxy.GeyserViaProxyMain")
+    manifest.attributes["Main-Class"] = "org.geysermc.geyser.platform.viaproxy.GeyserViaProxyMain"
 }
 
 tasks.withType<com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar> {

bootstrap/viaproxy/src/main/java/org/geysermc/geyser/platform/viaproxy/GeyserViaProxyPlugin.java

@@ -34,13 +34,15 @@ import net.raphimc.viaproxy.plugins.events.ProxyStartEvent;
 import net.raphimc.viaproxy.plugins.events.ProxyStopEvent;
 import net.raphimc.viaproxy.plugins.events.ShouldVerifyOnlineModeEvent;
 import org.apache.logging.log4j.LogManager;
+import org.checkerframework.checker.nullness.qual.NonNull;
 import org.geysermc.geyser.GeyserBootstrap;
 import org.geysermc.geyser.GeyserImpl;
 import org.geysermc.geyser.GeyserLogger;
 import org.geysermc.geyser.api.event.EventRegistrar;
 import org.geysermc.geyser.api.network.AuthType;
 import org.geysermc.geyser.api.util.PlatformType;
-import org.geysermc.geyser.command.GeyserCommandManager;
+import org.geysermc.geyser.command.CommandRegistry;
+import org.geysermc.geyser.command.standalone.StandaloneCloudCommandManager;
 import org.geysermc.geyser.configuration.GeyserConfiguration;
 import org.geysermc.geyser.dump.BootstrapDumpInfo;
 import org.geysermc.geyser.ping.GeyserLegacyPingPassthrough;
@@ -50,7 +52,6 @@ import org.geysermc.geyser.session.GeyserSession;
 import org.geysermc.geyser.text.GeyserLocale;
 import org.geysermc.geyser.util.FileUtils;
 import org.geysermc.geyser.util.LoopbackUtil;
-import org.jetbrains.annotations.NotNull;
 
 import java.io.File;
 import java.io.IOException;
@@ -66,7 +67,8 @@ public class GeyserViaProxyPlugin extends ViaProxyPlugin implements GeyserBootst
     private final GeyserViaProxyLogger logger = new GeyserViaProxyLogger(LogManager.getLogger("Geyser"));
     private GeyserViaProxyConfiguration config;
     private GeyserImpl geyser;
-    private GeyserCommandManager commandManager;
+    private StandaloneCloudCommandManager cloud;
+    private CommandRegistry commandRegistry;
     private IGeyserPingPassthrough pingPassthrough;
 
     @Override
@@ -87,7 +89,9 @@ public class GeyserViaProxyPlugin extends ViaProxyPlugin implements GeyserBootst
     @EventHandler
     private void onConsoleCommand(final ConsoleCommandEvent event) {
         final String command = event.getCommand().startsWith("/") ? event.getCommand().substring(1) : event.getCommand();
-        if (this.getGeyserCommandManager().runCommand(this.getGeyserLogger(), command + " " + String.join(" ", event.getArgs()))) {
+        CommandRegistry registry = this.getCommandRegistry();
+        if (registry.rootCommands().contains(command)) {
+            registry.runCommand(this.getGeyserLogger(), command + " " + String.join(" ", event.getArgs()));
             event.setCancelled(true);
         }
     }
@@ -128,17 +132,25 @@ public class GeyserViaProxyPlugin extends ViaProxyPlugin implements GeyserBootst
 
     @Override
     public void onGeyserEnable() {
-        if (GeyserImpl.getInstance().isReloading()) {
+        boolean reloading = geyser.isReloading();
+        if (reloading) {
             if (!this.loadConfig()) {
                 return;
             }
+        } else {
+            // Only initialized once - documented in the Geyser-Standalone bootstrap
+            this.cloud = new StandaloneCloudCommandManager(geyser);
+            this.commandRegistry = new CommandRegistry(geyser, cloud);
         }
 
-        this.commandManager = new GeyserCommandManager(this.geyser);
-        this.commandManager.init();
-
         GeyserImpl.start();
 
+        if (!reloading) {
+            // Event must be fired after CommandRegistry has subscribed its listener.
+            // Also, the subscription for the Permissions class is created when Geyser is initialized (by GeyserImpl#start)
+            this.cloud.fireRegisterPermissionsEvent();
+        }
+
         if (ViaProxy.getConfig().getTargetVersion() != null && ViaProxy.getConfig().getTargetVersion().newerThanOrEqualTo(LegacyProtocolVersion.b1_8tob1_8_1)) {
             // Only initialize the ping passthrough if the protocol version is above beta 1.7.3, as that's when the status protocol was added
             this.pingPassthrough = GeyserLegacyPingPassthrough.init(this.geyser);
@@ -166,8 +178,8 @@ public class GeyserViaProxyPlugin extends ViaProxyPlugin implements GeyserBootst
     }
 
     @Override
-    public GeyserCommandManager getGeyserCommandManager() {
+    public CommandRegistry getCommandRegistry() {
-        return this.commandManager;
+        return this.commandRegistry;
     }
 
     @Override
@@ -185,7 +197,7 @@ public class GeyserViaProxyPlugin extends ViaProxyPlugin implements GeyserBootst
         return new GeyserViaProxyDumpInfo();
     }
 
-    @NotNull
+    @NonNull
     @Override
     public String getServerBindAddress() {
         if (ViaProxy.getConfig().getBindAddress() instanceof InetSocketAddress socketAddress) {
@@ -209,6 +221,7 @@ public class GeyserViaProxyPlugin extends ViaProxyPlugin implements GeyserBootst
         return false;
     }
 
+    @SuppressWarnings("BooleanMethodIsAlwaysInverted")
     private boolean loadConfig() {
         try {
             final File configFile = FileUtils.fileOrCopiedFromResource(new File(ROOT_FOLDER, "config.yml"), "config.yml", s -> s.replaceAll("generateduuid", UUID.randomUUID().toString()), this);

build-logic/src/main/kotlin/geyser.modded-conventions.gradle.kts

@@ -37,6 +37,10 @@ provided("io.netty", "netty-resolver-dns")
 provided("io.netty", "netty-resolver-dns-native-macos")
 provided("org.ow2.asm", "asm")
 
+// cloud-fabric/cloud-neoforge jij's all cloud depends already
+provided("org.incendo", ".*")
+provided("io.leangen.geantyref", "geantyref")
+
 architectury {
     minecraft = libs.minecraft.get().version as String
 }

build-logic/src/main/kotlin/geyser.platform-conventions.gradle.kts

@@ -1,4 +1,3 @@
 plugins {
-    application
     id("geyser.publish-conventions")
 }

common/src/main/java/org/geysermc/floodgate/util/DeviceOs.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019-2022 GeyserMC. http://geysermc.org
+ * Copyright (c) 2019-2024 GeyserMC. http://geysermc.org
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -39,15 +39,19 @@ public enum DeviceOs {
     OSX("macOS"),
     AMAZON("Amazon"),
     GEARVR("Gear VR"),
-    HOLOLENS("Hololens"),
+    @Deprecated HOLOLENS("Hololens"),
     UWP("Windows"),
     WIN32("Windows x86"),
     DEDICATED("Dedicated"),
-    TVOS("Apple TV"),
+    @Deprecated TVOS("Apple TV"),
-    PS4("PS4"),
+    /**
+     * This is for all PlayStation platforms not just PS4
+     */
+    PS4("PlayStation"),
     NX("Switch"),
-    XBOX("Xbox One"),
+    XBOX("Xbox"),
-    WINDOWS_PHONE("Windows Phone");
+    @Deprecated WINDOWS_PHONE("Windows Phone"),
+    LINUX("Linux");
 
     private static final DeviceOs[] VALUES = values();
 

core/build.gradle.kts

@@ -51,6 +51,9 @@ dependencies {
     // Adventure text serialization
     api(libs.bundles.adventure)
 
+    // command library
+    api(libs.cloud.core)
+
     api(libs.erosion.common) {
         isTransitive = false
     }

core/src/main/java/org/geysermc/geyser/Constants.java

@@ -35,9 +35,7 @@ public final class Constants {
     public static final String NEWS_PROJECT_NAME = "geyser";
 
     public static final String FLOODGATE_DOWNLOAD_LOCATION = "https://geysermc.org/download#floodgate";
-
     public static final String GEYSER_DOWNLOAD_LOCATION = "https://geysermc.org/download";
-    public static final String UPDATE_PERMISSION = "geyser.update";
 
     @Deprecated
     static final String SAVED_REFRESH_TOKEN_FILE = "saved-refresh-tokens.json";

core/src/main/java/org/geysermc/geyser/GeyserBootstrap.java

@@ -27,7 +27,7 @@ package org.geysermc.geyser;
 
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
-import org.geysermc.geyser.command.GeyserCommandManager;
+import org.geysermc.geyser.command.CommandRegistry;
 import org.geysermc.geyser.configuration.GeyserConfiguration;
 import org.geysermc.geyser.dump.BootstrapDumpInfo;
 import org.geysermc.geyser.level.GeyserWorldManager;
@@ -82,11 +82,11 @@ public interface GeyserBootstrap {
     GeyserLogger getGeyserLogger();
 
     /**
-     * Returns the current CommandManager
+     * Returns the current CommandRegistry
      *
-     * @return The current CommandManager
+     * @return The current CommandRegistry
      */
-    GeyserCommandManager getGeyserCommandManager();
+    CommandRegistry getCommandRegistry();
 
     /**
      * Returns the current PingPassthrough manager

core/src/main/java/org/geysermc/geyser/GeyserImpl.java

@@ -62,13 +62,14 @@ import org.geysermc.geyser.api.event.lifecycle.GeyserPostInitializeEvent;
 import org.geysermc.geyser.api.event.lifecycle.GeyserPostReloadEvent;
 import org.geysermc.geyser.api.event.lifecycle.GeyserPreInitializeEvent;
 import org.geysermc.geyser.api.event.lifecycle.GeyserPreReloadEvent;
+import org.geysermc.geyser.api.event.lifecycle.GeyserRegisterPermissionsEvent;
 import org.geysermc.geyser.api.event.lifecycle.GeyserShutdownEvent;
 import org.geysermc.geyser.api.network.AuthType;
 import org.geysermc.geyser.api.network.BedrockListener;
 import org.geysermc.geyser.api.network.RemoteServer;
 import org.geysermc.geyser.api.util.MinecraftVersion;
 import org.geysermc.geyser.api.util.PlatformType;
-import org.geysermc.geyser.command.GeyserCommandManager;
+import org.geysermc.geyser.command.CommandRegistry;
 import org.geysermc.geyser.configuration.GeyserConfiguration;
 import org.geysermc.geyser.entity.EntityDefinitions;
 import org.geysermc.geyser.erosion.UnixSocketClientListener;
@@ -128,7 +129,7 @@ import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
 @Getter
-public class GeyserImpl implements GeyserApi {
+public class GeyserImpl implements GeyserApi, EventRegistrar {
     public static final ObjectMapper JSON_MAPPER = new ObjectMapper()
             .enable(JsonParser.Feature.IGNORE_UNDEFINED)
             .enable(JsonParser.Feature.ALLOW_COMMENTS)
@@ -231,9 +232,7 @@ public class GeyserImpl implements GeyserApi {
         logger.info(GeyserLocale.getLocaleStringLog("geyser.core.load", NAME, VERSION));
         logger.info("");
         if (IS_DEV) {
-            // TODO cloud use language string
+            logger.info(GeyserLocale.getLocaleStringLog("geyser.core.dev_build", "https://discord.gg/geysermc"));
-            //logger.info(GeyserLocale.getLocaleStringLog("geyser.core.dev_build", "https://discord.gg/geysermc"));
-            logger.info("You are running a development build of Geyser! Please report any bugs you find on our Discord server: %s".formatted("https://discord.gg/geysermc"));
             logger.info("");
         }
         logger.info("******************************************");
@@ -266,6 +265,9 @@ public class GeyserImpl implements GeyserApi {
             CompletableFuture.runAsync(AssetUtils::downloadAndRunClientJarTasks);
         });
 
+        // Register our general permissions when possible
+        eventBus.subscribe(this, GeyserRegisterPermissionsEvent.class, Permissions::register);
+
         startInstance();
 
         GeyserConfiguration config = bootstrap.getGeyserConfig();
@@ -730,7 +732,6 @@ public class GeyserImpl implements GeyserApi {
         if (isEnabled) {
             this.disable();
         }
-        this.commandManager().getCommands().clear();
 
         // Disable extensions, fire the shutdown event
         this.eventBus.fire(new GeyserShutdownEvent(this.extensionManager, this.eventBus));
@@ -768,9 +769,12 @@ public class GeyserImpl implements GeyserApi {
         return this.extensionManager;
     }
 
+    /**
+     * @return the current CommandRegistry in use. The instance may change over the lifecycle of the Geyser runtime.
+     */
     @NonNull
-    public GeyserCommandManager commandManager() {
+    public CommandRegistry commandRegistry() {
-        return this.bootstrap.getGeyserCommandManager();
+        return this.bootstrap.getCommandRegistry();
     }
 
     @Override

core/src/main/java/org/geysermc/geyser/GeyserLogger.java

@@ -30,6 +30,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.geysermc.geyser.command.GeyserCommandSource;
 
+import java.util.UUID;
 
 public interface GeyserLogger extends GeyserCommandSource {
 
@@ -129,6 +130,11 @@ public interface GeyserLogger extends GeyserCommandSource {
         return true;
     }
 
+    @Override
+    default @Nullable UUID playerUuid() {
+        return null;
+    }
+
     @Override
     default boolean hasPermission(String permission) {
         return true;

core/src/main/java/org/geysermc/geyser/Permissions.java

@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2024 GeyserMC. http://geysermc.org
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @author GeyserMC
+ * @link https://github.com/GeyserMC/Geyser
+ */
+
+package org.geysermc.geyser;
+
+import org.geysermc.geyser.api.event.lifecycle.GeyserRegisterPermissionsEvent;
+import org.geysermc.geyser.api.util.TriState;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Permissions related to Geyser
+ */
+public final class Permissions {
+    private static final Map<String, TriState> PERMISSIONS = new HashMap<>();
+
+    public static final String CHECK_UPDATE = register("geyser.update");
+    public static final String SERVER_SETTINGS = register("geyser.settings.server");
+    public static final String SETTINGS_GAMERULES = register("geyser.settings.gamerules");
+
+    private Permissions() {
+        //no
+    }
+
+    private static String register(String permission) {
+        return register(permission, TriState.NOT_SET);
+    }
+
+    @SuppressWarnings("SameParameterValue")
+    private static String register(String permission, TriState permissionDefault) {
+        PERMISSIONS.put(permission, permissionDefault);
+        return permission;
+    }
+
+    public static void register(GeyserRegisterPermissionsEvent event) {
+        for (Map.Entry<String, TriState> permission : PERMISSIONS.entrySet()) {
+            event.register(permission.getKey(), permission.getValue());
+        }
+    }
+}

core/src/main/java/org/geysermc/geyser/command/CommandRegistry.java

@@ -0,0 +1,302 @@
+/*
+ * Copyright (c) 2019-2022 GeyserMC. http://geysermc.org
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @author GeyserMC
+ * @link https://github.com/GeyserMC/Geyser
+ */
+
+package org.geysermc.geyser.command;
+
+import it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.geysermc.geyser.GeyserImpl;
+import org.geysermc.geyser.api.command.Command;
+import org.geysermc.geyser.api.event.EventRegistrar;
+import org.geysermc.geyser.api.event.lifecycle.GeyserDefineCommandsEvent;
+import org.geysermc.geyser.api.event.lifecycle.GeyserRegisterPermissionsEvent;
+import org.geysermc.geyser.api.extension.Extension;
+import org.geysermc.geyser.api.util.PlatformType;
+import org.geysermc.geyser.api.util.TriState;
+import org.geysermc.geyser.command.defaults.AdvancedTooltipsCommand;
+import org.geysermc.geyser.command.defaults.AdvancementsCommand;
+import org.geysermc.geyser.command.defaults.ConnectionTestCommand;
+import org.geysermc.geyser.command.defaults.DumpCommand;
+import org.geysermc.geyser.command.defaults.ExtensionsCommand;
+import org.geysermc.geyser.command.defaults.HelpCommand;
+import org.geysermc.geyser.command.defaults.ListCommand;
+import org.geysermc.geyser.command.defaults.OffhandCommand;
+import org.geysermc.geyser.command.defaults.PingCommand;
+import org.geysermc.geyser.command.defaults.ReloadCommand;
+import org.geysermc.geyser.command.defaults.SettingsCommand;
+import org.geysermc.geyser.command.defaults.StatisticsCommand;
+import org.geysermc.geyser.command.defaults.StopCommand;
+import org.geysermc.geyser.command.defaults.VersionCommand;
+import org.geysermc.geyser.event.type.GeyserDefineCommandsEventImpl;
+import org.geysermc.geyser.extension.command.GeyserExtensionCommand;
+import org.geysermc.geyser.text.GeyserLocale;
+import org.incendo.cloud.Command.Builder;
+import org.incendo.cloud.CommandManager;
+import org.incendo.cloud.execution.ExecutionCoordinator;
+
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Map;
+
+import static org.geysermc.geyser.command.GeyserCommand.DEFAULT_ROOT_COMMAND;
+
+/**
+ * Registers all built-in and extension commands to the given Cloud CommandManager.
+ * <p>
+ * Fires {@link GeyserDefineCommandsEvent} upon construction.
+ * <p>
+ * Subscribes to {@link GeyserRegisterPermissionsEvent} upon construction.
+ * A new instance of this class (that registers the same permissions) shouldn't be created until the previous
+ * instance is unsubscribed from the event.
+ */
+public class CommandRegistry implements EventRegistrar {
+
+    private static final String GEYSER_ROOT_PERMISSION = "geyser.command";
+
+    protected final GeyserImpl geyser;
+    private final CommandManager<GeyserCommandSource> cloud;
+    private final boolean applyRootPermission;
+
+    /**
+     * Map of Geyser subcommands to their Commands
+     */
+    private final Map<String, GeyserCommand> commands = new Object2ObjectOpenHashMap<>(13);
+
+    /**
+     * Map of Extensions to maps of their subcommands
+     */
+    private final Map<Extension, Map<String, GeyserCommand>> extensionCommands = new Object2ObjectOpenHashMap<>(0);
+
+    /**
+     * Map of root commands (that are for extensions) to Extensions
+     */
+    private final Map<String, Extension> extensionRootCommands = new Object2ObjectOpenHashMap<>(0);
+
+    /**
+     * Map containing only permissions that have been registered with a default value
+     */
+    protected final Map<String, TriState> permissionDefaults = new Object2ObjectOpenHashMap<>(13);
+
+    /**
+     * Creates a new CommandRegistry. Does apply a root permission. If undesired, use the other constructor.
+     */
+    public CommandRegistry(GeyserImpl geyser, CommandManager<GeyserCommandSource> cloud) {
+        this(geyser, cloud, true);
+    }
+
+    /**
+     * Creates a new CommandRegistry
+     *
+     * @param geyser the Geyser instance
+     * @param cloud the cloud command manager to register commands to
+     * @param applyRootPermission true if this registry should apply a permission to Geyser and Extension root commands.
+     *                            This currently exists because we want to retain the root command permission for Spigot,
+     *                            but don't want to add it yet to platforms like Velocity where we cannot natively
+     *                            specify a permission default. Doing so will break setups as players would suddenly not
+     *                            have the required permission to execute any Geyser commands.
+     */
+    public CommandRegistry(GeyserImpl geyser, CommandManager<GeyserCommandSource> cloud, boolean applyRootPermission) {
+        this.geyser = geyser;
+        this.cloud = cloud;
+        this.applyRootPermission = applyRootPermission;
+
+        // register our custom exception handlers
+        ExceptionHandlers.register(cloud);
+
+        // begin command registration
+        HelpCommand help = new HelpCommand(DEFAULT_ROOT_COMMAND, "help", "geyser.commands.help.desc", "geyser.command.help", this.commands);
+        registerBuiltInCommand(help);
+        buildRootCommand(GEYSER_ROOT_PERMISSION, help); // build root and delegate to help
+
+        registerBuiltInCommand(new ListCommand(geyser, "list", "geyser.commands.list.desc", "geyser.command.list"));
+        registerBuiltInCommand(new ReloadCommand(geyser, "reload", "geyser.commands.reload.desc", "geyser.command.reload"));
+        registerBuiltInCommand(new OffhandCommand("offhand", "geyser.commands.offhand.desc", "geyser.command.offhand"));
+        registerBuiltInCommand(new DumpCommand(geyser, "dump", "geyser.commands.dump.desc", "geyser.command.dump"));
+        registerBuiltInCommand(new VersionCommand(geyser, "version", "geyser.commands.version.desc", "geyser.command.version"));
+        registerBuiltInCommand(new SettingsCommand("settings", "geyser.commands.settings.desc", "geyser.command.settings"));
+        registerBuiltInCommand(new StatisticsCommand("statistics", "geyser.commands.statistics.desc", "geyser.command.statistics"));
+        registerBuiltInCommand(new AdvancementsCommand("advancements", "geyser.commands.advancements.desc", "geyser.command.advancements"));
+        registerBuiltInCommand(new AdvancedTooltipsCommand("tooltips", "geyser.commands.advancedtooltips.desc", "geyser.command.tooltips"));
+        registerBuiltInCommand(new ConnectionTestCommand(geyser, "connectiontest", "geyser.commands.connectiontest.desc", "geyser.command.connectiontest"));
+        registerBuiltInCommand(new PingCommand("ping", "geyser.commands.ping.desc", "geyser.command.ping"));
+        if (this.geyser.getPlatformType() == PlatformType.STANDALONE) {
+            registerBuiltInCommand(new StopCommand(geyser, "stop", "geyser.commands.stop.desc", "geyser.command.stop"));
+        }
+
+        if (!this.geyser.extensionManager().extensions().isEmpty()) {
+            registerBuiltInCommand(new ExtensionsCommand(this.geyser, "extensions", "geyser.commands.extensions.desc", "geyser.command.extensions"));
+        }
+
+        GeyserDefineCommandsEvent defineCommandsEvent = new GeyserDefineCommandsEventImpl(this.commands) {
+
+            @Override
+            public void register(@NonNull Command command) {
+                if (!(command instanceof GeyserExtensionCommand extensionCommand)) {
+                    throw new IllegalArgumentException("Expected GeyserExtensionCommand as part of command registration but got " + command + "! Did you use the Command builder properly?");
+                }
+
+                registerExtensionCommand(extensionCommand.extension(), extensionCommand);
+            }
+        };
+        this.geyser.eventBus().fire(defineCommandsEvent);
+
+        // Stuff that needs to be done on a per-extension basis
+        for (Map.Entry<Extension, Map<String, GeyserCommand>> entry : this.extensionCommands.entrySet()) {
+            Extension extension = entry.getKey();
+
+            // Register this extension's root command
+            extensionRootCommands.put(extension.rootCommand(), extension);
+
+            // Register help commands for all extensions with commands
+            String id = extension.description().id();
+            HelpCommand extensionHelp = new HelpCommand(
+                extension.rootCommand(),
+                "help",
+                "geyser.commands.exthelp.desc",
+                "geyser.command.exthelp." + id,
+                entry.getValue()); // commands it provides help for
+
+            registerExtensionCommand(extension, extensionHelp);
+            buildRootCommand("geyser.extension." + id + ".command", extensionHelp);
+        }
+
+        // Wait for the right moment (depends on the platform) to register permissions.
+        geyser.eventBus().subscribe(this, GeyserRegisterPermissionsEvent.class, this::onRegisterPermissions);
+    }
+
+    /**
+     * @return an immutable view of the root commands registered to this command registry
+     */
+    @NonNull
+    public Collection<String> rootCommands() {
+        return cloud.rootCommands();
+    }
+
+    /**
+     * For internal Geyser commands
+     */
+    private void registerBuiltInCommand(GeyserCommand command) {
+        register(command, this.commands);
+    }
+
+    private void registerExtensionCommand(@NonNull Extension extension, @NonNull GeyserCommand command) {
+        register(command, this.extensionCommands.computeIfAbsent(extension, e -> new HashMap<>()));
+    }
+
+    protected void register(GeyserCommand command, Map<String, GeyserCommand> commands) {
+        String root = command.rootCommand();
+        String name = command.name();
+        if (commands.containsKey(name)) {
+            throw new IllegalArgumentException("Command with root=%s, name=%s already registered".formatted(root, name));
+        }
+
+        command.register(cloud);
+        commands.put(name, command);
+        geyser.getLogger().debug(GeyserLocale.getLocaleStringLog("geyser.commands.registered", root + " " + name));
+
+        for (String alias : command.aliases()) {
+            commands.put(alias, command);
+        }
+
+        String permission = command.permission();
+        TriState defaultValue = command.permissionDefault();
+        if (!permission.isBlank() && defaultValue != null) {
+
+            TriState existingDefault = permissionDefaults.get(permission);
+            // Extensions might be using the same permission for two different commands
+            if (existingDefault != null && existingDefault != defaultValue) {
+                geyser.getLogger().debug("Overriding permission default %s:%s with %s".formatted(permission, existingDefault, defaultValue));
+            }
+
+            permissionDefaults.put(permission, defaultValue);
+        }
+    }
+
+    /**
+     * Registers a root command to cloud that delegates to the given help command.
+     * The name of this root command is the root of the given help command.
+     *
+     * @param permission the permission of the root command. currently, it may or may not be
+     *                   applied depending on the platform. see below.
+     * @param help the help command to delegate to
+     */
+    private void buildRootCommand(String permission, HelpCommand help) {
+        Builder<GeyserCommandSource> builder = cloud.commandBuilder(help.rootCommand());
+
+        if (applyRootPermission) {
+            builder = builder.permission(permission);
+            permissionDefaults.put(permission, TriState.TRUE);
+        }
+
+        cloud.command(builder.handler(context -> {
+            GeyserCommandSource source = context.sender();
+            if (!source.hasPermission(help.permission())) {
+                // delegate if possible - otherwise we have nothing else to offer the user.
+                source.sendLocaleString(ExceptionHandlers.PERMISSION_FAIL_LANG_KEY);
+                return;
+            }
+            help.execute(source);
+        }));
+    }
+
+    protected void onRegisterPermissions(GeyserRegisterPermissionsEvent event) {
+        for (Map.Entry<String, TriState> permission : permissionDefaults.entrySet()) {
+            event.register(permission.getKey(), permission.getValue());
+        }
+    }
+
+    public boolean hasPermission(GeyserCommandSource source, String permission) {
+        // Handle blank permissions ourselves, as cloud only handles empty ones
+        return permission.isBlank() || cloud.hasPermission(source, permission);
+    }
+
+    /**
+     * Returns the description of the given command
+     *
+     * @param command the root command node
+     * @param locale the ideal locale that the description should be in
+     * @return a description if found, otherwise an empty string. The locale is not guaranteed.
+     */
+    @NonNull
+    public String description(@NonNull String command, @NonNull String locale) {
+        if (command.equals(DEFAULT_ROOT_COMMAND)) {
+            return GeyserLocale.getPlayerLocaleString("geyser.command.root.geyser", locale);
+        }
+
+        Extension extension = extensionRootCommands.get(command);
+        if (extension != null) {
+            return GeyserLocale.getPlayerLocaleString("geyser.command.root.extension", locale, extension.name());
+        }
+        return "";
+    }
+
+    /**
+     * Dispatches a command into cloud and handles any thrown exceptions.
+     * This method may or may not be blocking, depending on the {@link ExecutionCoordinator} in use by cloud.
+     */
+    public void runCommand(@NonNull GeyserCommandSource source, @NonNull String command) {
+        cloud.commandExecutor().executeCommand(source, command);
+    }
+}

core/src/main/java/org/geysermc/geyser/command/CommandSourceConverter.java

@@ -0,0 +1,113 @@
+/*
+ * Copyright (c) 2019-2023 GeyserMC. http://geysermc.org
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @author GeyserMC
+ * @link https://github.com/GeyserMC/Geyser
+ */
+
+package org.geysermc.geyser.command;
+
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.geysermc.geyser.GeyserImpl;
+import org.geysermc.geyser.GeyserLogger;
+import org.geysermc.geyser.session.GeyserSession;
+import org.incendo.cloud.SenderMapper;
+
+import java.util.UUID;
+import java.util.function.Function;
+import java.util.function.Supplier;
+
+/**
+ * Converts {@link GeyserCommandSource}s to the server's command sender type (and back) in a lenient manner.
+ *
+ * @param senderType class of the server command sender type
+ * @param playerLookup function for looking up a player command sender by UUID
+ * @param consoleProvider supplier of the console command sender
+ * @param commandSourceLookup supplier of the platform implementation of the {@link GeyserCommandSource}
+ * @param <S> server command sender type
+ */
+public record CommandSourceConverter<S>(Class<S> senderType,
+                                           Function<UUID, S> playerLookup,
+                                           Supplier<S> consoleProvider,
+                                           Function<S, GeyserCommandSource> commandSourceLookup
+) implements SenderMapper<S, GeyserCommandSource> {
+
+    /**
+     * Creates a new CommandSourceConverter for a server platform
+     * in which the player type is not a command sender type, and must be mapped.
+     *
+     * @param senderType class of the command sender type
+     * @param playerLookup function for looking up a player by UUID
+     * @param senderLookup function for converting a player to a command sender
+     * @param consoleProvider supplier of the console command sender
+     * @param commandSourceLookup supplier of the platform implementation of {@link GeyserCommandSource}
+     * @return a new CommandSourceConverter
+     * @param <P> server player type
+     * @param <S> server command sender type
+     */
+    public static <P, S> CommandSourceConverter<S> layered(Class<S> senderType,
+                                                           Function<UUID, P> playerLookup,
+                                                           Function<P, S> senderLookup,
+                                                           Supplier<S> consoleProvider,
+                                                           Function<S, GeyserCommandSource> commandSourceLookup) {
+        Function<UUID, S> lookup = uuid -> {
+            P player = playerLookup.apply(uuid);
+            if (player == null) {
+                return null;
+            }
+            return senderLookup.apply(player);
+        };
+        return new CommandSourceConverter<>(senderType, lookup, consoleProvider, commandSourceLookup);
+    }
+
+    @Override
+    public @NonNull GeyserCommandSource map(@NonNull S base) {
+        return commandSourceLookup.apply(base);
+    }
+
+    @Override
+    public @NonNull S reverse(GeyserCommandSource source) throws IllegalArgumentException {
+        Object handle = source.handle();
+        if (senderType.isInstance(handle)) {
+            return senderType.cast(handle); // one of the server platform implementations
+        }
+
+        if (source.isConsole()) {
+            return consoleProvider.get(); // one of the loggers
+        }
+
+        if (!(source instanceof GeyserSession)) {
+            GeyserLogger logger = GeyserImpl.getInstance().getLogger();
+            if (logger.isDebug()) {
+                logger.debug("Falling back to UUID for command sender lookup for a command source that is not a GeyserSession: " + source);
+                Thread.dumpStack();
+            }
+        }
+
+        // Ideally lookup should only be necessary for GeyserSession
+        UUID uuid = source.playerUuid();
+        if (uuid != null) {
+            return playerLookup.apply(uuid);
+        }
+
+        throw new IllegalArgumentException("failed to find sender for name=%s, uuid=%s".formatted(source.name(), source.playerUuid()));
+    }
+}

core/src/main/java/org/geysermc/geyser/command/ExceptionHandlers.java

@@ -0,0 +1,129 @@
+/*
+ * Copyright (c) 2019-2024 GeyserMC. http://geysermc.org
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @author GeyserMC
+ * @link https://github.com/GeyserMC/Geyser
+ */
+
+package org.geysermc.geyser.command;
+
+import io.leangen.geantyref.GenericTypeReflector;
+import org.geysermc.geyser.GeyserImpl;
+import org.geysermc.geyser.GeyserLogger;
+import org.geysermc.geyser.text.ChatColor;
+import org.geysermc.geyser.text.GeyserLocale;
+import org.geysermc.geyser.text.MinecraftLocale;
+import org.incendo.cloud.CommandManager;
+import org.incendo.cloud.exception.ArgumentParseException;
+import org.incendo.cloud.exception.CommandExecutionException;
+import org.incendo.cloud.exception.InvalidCommandSenderException;
+import org.incendo.cloud.exception.InvalidSyntaxException;
+import org.incendo.cloud.exception.NoPermissionException;
+import org.incendo.cloud.exception.NoSuchCommandException;
+import org.incendo.cloud.exception.handling.ExceptionController;
+
+import java.lang.reflect.Type;
+import java.util.function.BiConsumer;
+
+/**
+ * Geyser's exception handlers for command execution with Cloud.
+ * Overrides Cloud's defaults so that messages can be customized to our liking: localization, etc.
+ */
+final class ExceptionHandlers {
+
+    final static String PERMISSION_FAIL_LANG_KEY = "geyser.command.permission_fail";
+
+    private final ExceptionController<GeyserCommandSource> controller;
+
+    private ExceptionHandlers(ExceptionController<GeyserCommandSource> controller) {
+        this.controller = controller;
+    }
+
+    /**
+     * Clears the existing handlers that are registered to the given command manager, and repopulates them.
+     *
+     * @param manager the manager whose exception handlers will be modified
+     */
+    static void register(CommandManager<GeyserCommandSource> manager) {
+        new ExceptionHandlers(manager.exceptionController()).register();
+    }
+
+    private void register() {
+        // Yeet the default exception handlers that cloud provides so that we can perform localization.
+        controller.clearHandlers();
+
+        registerExceptionHandler(InvalidSyntaxException.class,
+            (src, e) -> src.sendLocaleString("geyser.command.invalid_syntax", e.correctSyntax()));
+
+        registerExceptionHandler(InvalidCommandSenderException.class, (src, e) -> {
+            // We currently don't use cloud sender type requirements anywhere.
+            // This can be implemented better in the future if necessary.
+            Type type = e.requiredSenderTypes().iterator().next(); // just grab the first
+            String typeString = GenericTypeReflector.getTypeName(type);
+            src.sendLocaleString("geyser.command.invalid_sender", e.commandSender().getClass().getSimpleName(), typeString);
+        });
+
+        registerExceptionHandler(NoPermissionException.class, ExceptionHandlers::handleNoPermission);
+
+        registerExceptionHandler(NoSuchCommandException.class,
+            (src, e) -> src.sendLocaleString("geyser.command.not_found"));
+
+        registerExceptionHandler(ArgumentParseException.class,
+            (src, e) -> src.sendLocaleString("geyser.command.invalid_argument", e.getCause().getMessage()));
+
+        registerExceptionHandler(CommandExecutionException.class,
+            (src, e) -> handleUnexpectedThrowable(src, e.getCause()));
+
+        registerExceptionHandler(Throwable.class,
+            (src, e) -> handleUnexpectedThrowable(src, e.getCause()));
+    }
+
+    private <E extends Throwable> void registerExceptionHandler(Class<E> type, BiConsumer<GeyserCommandSource, E> handler) {
+        controller.registerHandler(type, context -> handler.accept(context.context().sender(), context.exception()));
+    }
+
+    private static void handleNoPermission(GeyserCommandSource source, NoPermissionException exception) {
+        // custom handling if the source can't use the command because of additional requirements
+        if (exception.permissionResult() instanceof GeyserPermission.Result result) {
+            if (result.meta() == GeyserPermission.Result.Meta.NOT_BEDROCK) {
+                source.sendMessage(ChatColor.RED + GeyserLocale.getPlayerLocaleString("geyser.command.bedrock_only", source.locale()));
+                return;
+            }
+            if (result.meta() == GeyserPermission.Result.Meta.NOT_PLAYER) {
+                source.sendMessage(ChatColor.RED + GeyserLocale.getPlayerLocaleString("geyser.command.player_only", source.locale()));
+                return;
+            }
+        } else {
+            GeyserLogger logger = GeyserImpl.getInstance().getLogger();
+            if (logger.isDebug()) {
+                logger.debug("Expected a GeyserPermission.Result for %s but instead got %s from %s".formatted(exception.currentChain(), exception.permissionResult(), exception.missingPermission()));
+            }
+        }
+
+        // Result.NO_PERMISSION or generic permission failure
+        source.sendLocaleString(PERMISSION_FAIL_LANG_KEY);
+    }
+
+    private static void handleUnexpectedThrowable(GeyserCommandSource source, Throwable throwable) {
+        source.sendMessage(MinecraftLocale.getLocaleString("command.failed", source.locale())); // java edition translation key
+        GeyserImpl.getInstance().getLogger().error("Exception while executing command handler", throwable);
+    }
+}

core/src/main/java/org/geysermc/geyser/command/GeyserCommand.java

@@ -25,65 +25,187 @@
 
 package org.geysermc.geyser.command;
 
-import lombok.Getter;
-import lombok.RequiredArgsConstructor;
-import lombok.experimental.Accessors;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
-import org.geysermc.geyser.api.command.Command;
+import org.geysermc.geyser.api.event.lifecycle.GeyserRegisterPermissionsEvent;
-import org.geysermc.geyser.session.GeyserSession;
+import org.geysermc.geyser.api.util.TriState;
+import org.geysermc.geyser.text.GeyserLocale;
+import org.incendo.cloud.Command;
+import org.incendo.cloud.CommandManager;
+import org.incendo.cloud.context.CommandContext;
+import org.incendo.cloud.description.CommandDescription;
+import org.jetbrains.annotations.Contract;
 
 import java.util.Collections;
 import java.util.List;
 
-@Accessors(fluent = true)
+public abstract class GeyserCommand implements org.geysermc.geyser.api.command.Command {
-@Getter
+    public static final String DEFAULT_ROOT_COMMAND = "geyser";
-@RequiredArgsConstructor
+
-public abstract class GeyserCommand implements Command {
+    /**
+     * The second literal of the command. Note: the first literal is {@link #rootCommand()}.
+     */
+    @NonNull
+    private final String name;
 
-    protected final String name;
     /**
      * The description of the command - will attempt to be translated.
      */
-    protected final String description;
+    @NonNull
-    protected final String permission;
+    private final String description;
-
-    private List<String> aliases = Collections.emptyList();
-
-    public abstract void execute(@Nullable GeyserSession session, GeyserCommandSource sender, String[] args);
 
     /**
-     * If false, hides the command from being shown on the Geyser Standalone GUI.
+     * The permission node required to run the command, or blank if not required.
-     *
-     * @return true if the command can be run on the server console
-     */
-    @Override
-    public boolean isExecutableOnConsole() {
-        return true;
-    }
-
-    /**
-     * Used in the GUI to know what subcommands can be run
-     *
-     * @return a list of all possible subcommands, or empty if none.
      */
     @NonNull
-    @Override
+    private final String permission;
-    public List<String> subCommands() {
+
-        return Collections.emptyList();
+    /**
+     * The default value of the permission node.
+     * A null value indicates that the permission node should not be registered whatsoever.
+     * See {@link GeyserRegisterPermissionsEvent#register(String, TriState)} for TriState meanings.
+     */
+    @Nullable
+    private final TriState permissionDefault;
+
+    /**
+     * True if this command can be executed by players
+     */
+    private final boolean playerOnly;
+
+    /**
+     * True if this command can only be run by bedrock players
+     */
+    private final boolean bedrockOnly;
+
+    /**
+     * The aliases of the command {@link #name}. This should not be modified after construction.
+     */
+    protected List<String> aliases = Collections.emptyList();
+
+    public GeyserCommand(@NonNull String name, @NonNull String description,
+                         @NonNull String permission, @Nullable TriState permissionDefault,
+                         boolean playerOnly, boolean bedrockOnly) {
+
+        if (name.isBlank()) {
+            throw new IllegalArgumentException("Command cannot be null or blank!");
+        }
+        if (permission.isBlank()) {
+            // Cloud treats empty permissions as available to everyone, but not blank permissions.
+            // When registering commands, we must convert ALL whitespace permissions into empty ones,
+            // because we cannot override permission checks that Cloud itself performs
+            permission = "";
+            permissionDefault = null;
         }
 
-    public void setAliases(List<String> aliases) {
+        this.name = name;
-        this.aliases = aliases;
+        this.description = description;
+        this.permission = permission;
+        this.permissionDefault = permissionDefault;
+
+        if (bedrockOnly && !playerOnly) {
+            throw new IllegalArgumentException("Command cannot be bedrockOnly if it is not playerOnly");
+        }
+
+        this.playerOnly = playerOnly;
+        this.bedrockOnly = bedrockOnly;
+    }
+
+    public GeyserCommand(@NonNull String name, @NonNull String description, @NonNull String permission, @Nullable TriState permissionDefault) {
+        this(name, description, permission, permissionDefault, false, false);
+    }
+
+    @NonNull
+    @Override
+    public final String name() {
+        return name;
+    }
+
+    @NonNull
+    @Override
+    public final String description() {
+        return description;
+    }
+
+    @NonNull
+    @Override
+    public final String permission() {
+        return permission;
+    }
+
+    @Nullable
+    public final TriState permissionDefault() {
+        return permissionDefault;
+    }
+
+    @Override
+    public final boolean isPlayerOnly() {
+        return playerOnly;
+    }
+
+    @Override
+    public final boolean isBedrockOnly() {
+        return bedrockOnly;
+    }
+
+    @NonNull
+    @Override
+    public final List<String> aliases() {
+        return Collections.unmodifiableList(aliases);
     }
 
     /**
-     * Used for permission defaults on server implementations.
+     * @return the first (literal) argument of this command, which comes before {@link #name()}.
-     *
-     * @return if this command is designated to be used only by server operators.
      */
-    @Override
+    public String rootCommand() {
-    public boolean isSuggestedOpOnly() {
+        return DEFAULT_ROOT_COMMAND;
-        return false;
     }
+
+    /**
+     * Returns a {@link org.incendo.cloud.permission.Permission} that handles {@link #isBedrockOnly()}, {@link #isPlayerOnly()}, and {@link #permission()}.
+     *
+     * @param manager the manager to be used for permission node checking
+     * @return a permission that will properly restrict usage of this command
+     */
+    public final GeyserPermission commandPermission(CommandManager<GeyserCommandSource> manager) {
+        return new GeyserPermission(bedrockOnly, playerOnly, permission, manager);
+    }
+
+    /**
+     * Creates a new command builder with {@link #rootCommand()}, {@link #name()}, and {@link #aliases()} built on it.
+     * A permission predicate that takes into account {@link #permission()}, {@link #isBedrockOnly()}, and {@link #isPlayerOnly()}
+     * is applied. The Applicable from {@link #meta()} is also applied to the builder.
+     */
+    @Contract(value = "_ -> new", pure = true)
+    public final Command.Builder<GeyserCommandSource> baseBuilder(CommandManager<GeyserCommandSource> manager) {
+        return manager.commandBuilder(rootCommand())
+            .literal(name, aliases.toArray(new String[0]))
+            .permission(commandPermission(manager))
+            .apply(meta());
+    }
+
+    /**
+     * @return an Applicable that applies this command's description
+     */
+    protected Command.Builder.Applicable<GeyserCommandSource> meta() {
+        return builder -> builder
+            .commandDescription(CommandDescription.commandDescription(GeyserLocale.getLocaleStringLog(description))); // used in cloud-bukkit impl
+    }
+
+    /**
+     * Registers this command to the given command manager.
+     * This method may be overridden to register more than one command.
+     * <p>
+     * The default implementation is that {@link #baseBuilder(CommandManager)} with {@link #execute(CommandContext)}
+     * applied as the handler is registered to the manager.
+     */
+    public void register(CommandManager<GeyserCommandSource> manager) {
+        manager.command(baseBuilder(manager).handler(this::execute));
+    }
+
+    /**
+     * Executes this command
+     * @param context the context with which this command should be executed
+     */
+    public abstract void execute(CommandContext<GeyserCommandSource> context);
 }

core/src/main/java/org/geysermc/geyser/command/GeyserCommandExecutor.java

@@ -1,98 +0,0 @@
-/*
- * Copyright (c) 2019-2022 GeyserMC. http://geysermc.org
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- *
- * @author GeyserMC
- * @link https://github.com/GeyserMC/Geyser
- */
-
-package org.geysermc.geyser.command;
-
-import lombok.AllArgsConstructor;
-import org.checkerframework.checker.nullness.qual.Nullable;
-import org.geysermc.geyser.GeyserImpl;
-import org.geysermc.geyser.api.command.Command;
-import org.geysermc.geyser.session.GeyserSession;
-
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.List;
-import java.util.Map;
-
-/**
- * Represents helper functions for listening to {@code /geyser} or {@code /geyserext} commands.
- */
-@AllArgsConstructor
-public class GeyserCommandExecutor {
-
-    protected final GeyserImpl geyser;
-    private final Map<String, Command> commands;
-
-    public GeyserCommand getCommand(String label) {
-        return (GeyserCommand) commands.get(label);
-    }
-
-    @Nullable
-    public GeyserSession getGeyserSession(GeyserCommandSource sender) {
-        if (sender.isConsole()) {
-            return null;
-        }
-
-        for (GeyserSession session : geyser.getSessionManager().getSessions().values()) {
-            if (sender.name().equals(session.getPlayerEntity().getUsername())) {
-                return session;
-            }
-        }
-        return null;
-    }
-
-    /**
-     * Determine which subcommands to suggest in the tab complete for the main /geyser command by a given command sender.
-     *
-     * @param sender The command sender to receive the tab complete suggestions.
-     *               If the command sender is a bedrock player, an empty list will be returned as bedrock players do not get command argument suggestions.
-     *               If the command sender is not a bedrock player, bedrock commands will not be shown.
-     *               If the command sender does not have the permission for a given command, the command will not be shown.
-     * @return A list of command names to include in the tab complete
-     */
-    public List<String> tabComplete(GeyserCommandSource sender) {
-        if (getGeyserSession(sender) != null) {
-            // Bedrock doesn't get tab completions or argument suggestions
-            return Collections.emptyList();
-        }
-
-        List<String> availableCommands = new ArrayList<>();
-
-        // Only show commands they have permission to use
-        for (Map.Entry<String, Command> entry : commands.entrySet()) {
-            Command geyserCommand = entry.getValue();
-            if (sender.hasPermission(geyserCommand.permission())) {
-                if (geyserCommand.isBedrockOnly()) {
-                    // Don't show commands the JE player can't run
-                    continue;
-                }
-
-                availableCommands.add(entry.getKey());
-            }
-        }
-
-        return availableCommands;
-    }
-}

core/src/main/java/org/geysermc/geyser/command/GeyserCommandManager.java

@@ -1,330 +0,0 @@
-/*
- * Copyright (c) 2019-2022 GeyserMC. http://geysermc.org
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- *
- * @author GeyserMC
- * @link https://github.com/GeyserMC/Geyser
- */
-
-package org.geysermc.geyser.command;
-
-import it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap;
-import lombok.Getter;
-import lombok.RequiredArgsConstructor;
-import org.checkerframework.checker.nullness.qual.NonNull;
-import org.checkerframework.checker.nullness.qual.Nullable;
-import org.geysermc.geyser.api.util.PlatformType;
-import org.geysermc.geyser.GeyserImpl;
-import org.geysermc.geyser.api.command.Command;
-import org.geysermc.geyser.api.command.CommandExecutor;
-import org.geysermc.geyser.api.command.CommandSource;
-import org.geysermc.geyser.api.event.lifecycle.GeyserDefineCommandsEvent;
-import org.geysermc.geyser.api.extension.Extension;
-import org.geysermc.geyser.command.defaults.AdvancedTooltipsCommand;
-import org.geysermc.geyser.command.defaults.AdvancementsCommand;
-import org.geysermc.geyser.command.defaults.ConnectionTestCommand;
-import org.geysermc.geyser.command.defaults.DumpCommand;
-import org.geysermc.geyser.command.defaults.ExtensionsCommand;
-import org.geysermc.geyser.command.defaults.HelpCommand;
-import org.geysermc.geyser.command.defaults.ListCommand;
-import org.geysermc.geyser.command.defaults.OffhandCommand;
-import org.geysermc.geyser.command.defaults.ReloadCommand;
-import org.geysermc.geyser.command.defaults.SettingsCommand;
-import org.geysermc.geyser.command.defaults.StatisticsCommand;
-import org.geysermc.geyser.command.defaults.StopCommand;
-import org.geysermc.geyser.command.defaults.VersionCommand;
-import org.geysermc.geyser.event.type.GeyserDefineCommandsEventImpl;
-import org.geysermc.geyser.extension.command.GeyserExtensionCommand;
-import org.geysermc.geyser.session.GeyserSession;
-import org.geysermc.geyser.text.GeyserLocale;
-
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Locale;
-import java.util.Map;
-
-@RequiredArgsConstructor
-public class GeyserCommandManager {
-
-    @Getter
-    private final Map<String, Command> commands = new Object2ObjectOpenHashMap<>(12);
-    private final Map<Extension, Map<String, Command>> extensionCommands = new Object2ObjectOpenHashMap<>(0);
-
-    private final GeyserImpl geyser;
-
-    public void init() {
-        registerBuiltInCommand(new HelpCommand(geyser, "help", "geyser.commands.help.desc", "geyser.command.help", "geyser", this.commands));
-        registerBuiltInCommand(new ListCommand(geyser, "list", "geyser.commands.list.desc", "geyser.command.list"));
-        registerBuiltInCommand(new ReloadCommand(geyser, "reload", "geyser.commands.reload.desc", "geyser.command.reload"));
-        registerBuiltInCommand(new OffhandCommand(geyser, "offhand", "geyser.commands.offhand.desc", "geyser.command.offhand"));
-        registerBuiltInCommand(new DumpCommand(geyser, "dump", "geyser.commands.dump.desc", "geyser.command.dump"));
-        registerBuiltInCommand(new VersionCommand(geyser, "version", "geyser.commands.version.desc", "geyser.command.version"));
-        registerBuiltInCommand(new SettingsCommand(geyser, "settings", "geyser.commands.settings.desc", "geyser.command.settings"));
-        registerBuiltInCommand(new StatisticsCommand(geyser, "statistics", "geyser.commands.statistics.desc", "geyser.command.statistics"));
-        registerBuiltInCommand(new AdvancementsCommand("advancements", "geyser.commands.advancements.desc", "geyser.command.advancements"));
-        registerBuiltInCommand(new AdvancedTooltipsCommand("tooltips", "geyser.commands.advancedtooltips.desc", "geyser.command.tooltips"));
-        registerBuiltInCommand(new ConnectionTestCommand(geyser, "connectiontest", "geyser.commands.connectiontest.desc", "geyser.command.connectiontest"));
-        if (this.geyser.getPlatformType() == PlatformType.STANDALONE) {
-            registerBuiltInCommand(new StopCommand(geyser, "stop", "geyser.commands.stop.desc", "geyser.command.stop"));
-        }
-
-        if (!this.geyser.extensionManager().extensions().isEmpty()) {
-            registerBuiltInCommand(new ExtensionsCommand(this.geyser, "extensions", "geyser.commands.extensions.desc", "geyser.command.extensions"));
-        }
-
-        GeyserDefineCommandsEvent defineCommandsEvent = new GeyserDefineCommandsEventImpl(this.commands) {
-
-            @Override
-            public void register(@NonNull Command command) {
-                if (!(command instanceof GeyserExtensionCommand extensionCommand)) {
-                    throw new IllegalArgumentException("Expected GeyserExtensionCommand as part of command registration but got " + command + "! Did you use the Command builder properly?");
-                }
-
-                registerExtensionCommand(extensionCommand.extension(), extensionCommand);
-            }
-        };
-
-        this.geyser.eventBus().fire(defineCommandsEvent);
-
-        // Register help commands for all extensions with commands
-        for (Map.Entry<Extension, Map<String, Command>> entry : this.extensionCommands.entrySet()) {
-            String id = entry.getKey().description().id();
-            registerExtensionCommand(entry.getKey(), new HelpCommand(this.geyser, "help", "geyser.commands.exthelp.desc", "geyser.command.exthelp." + id, id, entry.getValue()));
-        }
-    }
-
-    /**
-     * For internal Geyser commands
-     */
-    public void registerBuiltInCommand(GeyserCommand command) {
-        register(command, this.commands);
-    }
-
-    public void registerExtensionCommand(@NonNull Extension extension, @NonNull Command command) {
-        register(command, this.extensionCommands.computeIfAbsent(extension, e -> new HashMap<>()));
-    }
-
-    private void register(Command command, Map<String, Command> commands) {
-        commands.put(command.name(), command);
-        geyser.getLogger().debug(GeyserLocale.getLocaleStringLog("geyser.commands.registered", command.name()));
-
-        if (command.aliases().isEmpty()) {
-            return;
-        }
-
-        for (String alias : command.aliases()) {
-            commands.put(alias, command);
-        }
-    }
-
-    @NonNull
-    public Map<String, Command> commands() {
-        return Collections.unmodifiableMap(this.commands);
-    }
-
-    @NonNull
-    public Map<Extension, Map<String, Command>> extensionCommands() {
-        return Collections.unmodifiableMap(this.extensionCommands);
-    }
-
-    public boolean runCommand(GeyserCommandSource sender, String command) {
-        Extension extension = null;
-        for (Extension loopedExtension : this.extensionCommands.keySet()) {
-            if (command.startsWith(loopedExtension.description().id() + " ")) {
-                extension = loopedExtension;
-                break;
-            }
-        }
-
-        if (!command.startsWith("geyser ") && extension == null) {
-            return false;
-        }
-
-        command = command.trim().replace(extension != null ? extension.description().id() + " " : "geyser ", "");
-        String label;
-        String[] args;
-
-        if (!command.contains(" ")) {
-            label = command.toLowerCase(Locale.ROOT);
-            args = new String[0];
-        } else {
-            label = command.substring(0, command.indexOf(" ")).toLowerCase(Locale.ROOT);
-            String argLine = command.substring(command.indexOf(" ") + 1);
-            args = argLine.contains(" ") ? argLine.split(" ") : new String[] { argLine };
-        }
-
-        Command cmd = (extension != null ? this.extensionCommands.getOrDefault(extension, Collections.emptyMap()) : this.commands).get(label);
-        if (cmd == null) {
-            sender.sendMessage(GeyserLocale.getLocaleStringLog("geyser.commands.invalid"));
-            return false;
-        }
-
-        if (cmd instanceof GeyserCommand) {
-            if (sender instanceof GeyserSession) {
-                ((GeyserCommand) cmd).execute((GeyserSession) sender, sender, args);
-            } else {
-                if (!cmd.isBedrockOnly()) {
-                    ((GeyserCommand) cmd).execute(null, sender, args);
-                } else {
-                    geyser.getLogger().error(GeyserLocale.getLocaleStringLog("geyser.bootstrap.command.bedrock_only"));
-                }
-            }
-        }
-
-        return true;
-    }
-
-    /**
-     * Returns the description of the given command
-     *
-     * @param command Command to get the description for
-     * @return Command description
-     */
-    public String description(String command) {
-        return "";
-    }
-
-    @RequiredArgsConstructor
-    public static class CommandBuilder<T extends CommandSource> implements Command.Builder<T> {
-        private final Extension extension;
-        private Class<? extends T> sourceType;
-        private String name;
-        private String description = "";
-        private String permission = "";
-        private List<String> aliases;
-        private boolean suggestedOpOnly = false;
-        private boolean executableOnConsole = true;
-        private List<String> subCommands;
-        private boolean bedrockOnly;
-        private CommandExecutor<T> executor;
-
-        @Override
-        public Command.Builder<T> source(@NonNull Class<? extends T> sourceType) {
-            this.sourceType = sourceType;
-            return this;
-        }
-
-        public CommandBuilder<T> name(@NonNull String name) {
-            this.name = name;
-            return this;
-        }
-
-        public CommandBuilder<T> description(@NonNull String description) {
-            this.description = description;
-            return this;
-        }
-
-        public CommandBuilder<T> permission(@NonNull String permission) {
-            this.permission = permission;
-            return this;
-        }
-
-        public CommandBuilder<T> aliases(@NonNull List<String> aliases) {
-            this.aliases = aliases;
-            return this;
-        }
-
-        @Override
-        public Command.Builder<T> suggestedOpOnly(boolean suggestedOpOnly) {
-            this.suggestedOpOnly = suggestedOpOnly;
-            return this;
-        }
-
-        public CommandBuilder<T> executableOnConsole(boolean executableOnConsole) {
-            this.executableOnConsole = executableOnConsole;
-            return this;
-        }
-
-        public CommandBuilder<T> subCommands(@NonNull List<String> subCommands) {
-            this.subCommands = subCommands;
-            return this;
-        }
-
-        public CommandBuilder<T> bedrockOnly(boolean bedrockOnly) {
-            this.bedrockOnly = bedrockOnly;
-            return this;
-        }
-
-        public CommandBuilder<T> executor(@NonNull CommandExecutor<T> executor) {
-            this.executor = executor;
-            return this;
-        }
-
-        @NonNull
-        public GeyserExtensionCommand build() {
-            if (this.name == null || this.name.isBlank()) {
-                throw new IllegalArgumentException("Command cannot be null or blank!");
-            }
-
-            if (this.sourceType == null) {
-                throw new IllegalArgumentException("Source type was not defined for command " + this.name + " in extension " + this.extension.name());
-            }
-
-            return new GeyserExtensionCommand(this.extension, this.name, this.description, this.permission) {
-
-                @SuppressWarnings("unchecked")
-                @Override
-                public void execute(@Nullable GeyserSession session, GeyserCommandSource sender, String[] args) {
-                    Class<? extends T> sourceType = CommandBuilder.this.sourceType;
-                    CommandExecutor<T> executor = CommandBuilder.this.executor;
-                    if (sourceType.isInstance(session)) {
-                        executor.execute((T) session, this, args);
-                        return;
-                    }
-
-                    if (sourceType.isInstance(sender)) {
-                        executor.execute((T) sender, this, args);
-                        return;
-                    }
-
-                    GeyserImpl.getInstance().getLogger().debug("Ignoring command " + this.name + " due to no suitable sender.");
-                }
-
-                @NonNull
-                @Override
-                public List<String> aliases() {
-                    return CommandBuilder.this.aliases == null ? Collections.emptyList() : CommandBuilder.this.aliases;
-                }
-
-                @Override
-                public boolean isSuggestedOpOnly() {
-                    return CommandBuilder.this.suggestedOpOnly;
-                }
-
-                @NonNull
-                @Override
-                public List<String> subCommands() {
-                    return CommandBuilder.this.subCommands == null ? Collections.emptyList() : CommandBuilder.this.subCommands;
-                }
-
-                @Override
-                public boolean isBedrockOnly() {
-                    return CommandBuilder.this.bedrockOnly;
-                }
-
-                @Override
-                public boolean isExecutableOnConsole() {
-                    return CommandBuilder.this.executableOnConsole;
-                }
-            };
-        }
-    }
-}

core/src/main/java/org/geysermc/geyser/command/GeyserCommandSource.java

@@ -25,11 +25,16 @@
 
 package org.geysermc.geyser.command;
 
+import org.checkerframework.checker.nullness.qual.Nullable;
+import org.geysermc.geyser.GeyserImpl;
 import org.geysermc.geyser.api.command.CommandSource;
+import org.geysermc.geyser.session.GeyserSession;
 import org.geysermc.geyser.text.GeyserLocale;
 import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer;
 
+import java.util.UUID;
+
 /**
  * Implemented on top of any class that can send a command.
  * For example, it wraps around Spigot's CommandSender class.
@@ -46,4 +51,29 @@ public interface GeyserCommandSource extends CommandSource {
     default void sendMessage(Component message) {
         sendMessage(LegacyComponentSerializer.legacySection().serialize(message));
     }
+
+    default void sendLocaleString(String key, Object... values) {
+        sendMessage(GeyserLocale.getPlayerLocaleString(key, locale(), values));
+    }
+
+    default void sendLocaleString(String key) {
+        sendMessage(GeyserLocale.getPlayerLocaleString(key, locale()));
+    }
+
+    @Override
+    default @Nullable GeyserSession connection() {
+        UUID uuid = playerUuid();
+        if (uuid == null) {
+            return null;
+        }
+        return GeyserImpl.getInstance().connectionByUuid(uuid);
+    }
+
+    /**
+     * @return the underlying platform handle that this source represents.
+     *         If such handle doesn't exist, this itself is returned.
+     */
+    default Object handle() {
+        return this;
+    }
 }

core/src/main/java/org/geysermc/geyser/command/GeyserPermission.java

@@ -0,0 +1,136 @@
+/*
+ * Copyright (c) 2019-2023 GeyserMC. http://geysermc.org
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @author GeyserMC
+ * @link https://github.com/GeyserMC/Geyser
+ */
+
+package org.geysermc.geyser.command;
+
+import lombok.AllArgsConstructor;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.incendo.cloud.CommandManager;
+import org.incendo.cloud.key.CloudKey;
+import org.incendo.cloud.permission.Permission;
+import org.incendo.cloud.permission.PermissionResult;
+import org.incendo.cloud.permission.PredicatePermission;
+
+import static org.geysermc.geyser.command.GeyserPermission.Result.Meta;
+
+@AllArgsConstructor
+public class GeyserPermission implements PredicatePermission<GeyserCommandSource> {
+
+    /**
+     * True if this permission requires the command source to be a bedrock player
+     */
+    private final boolean bedrockOnly;
+
+    /**
+     * True if this permission requires the command source to be any player
+     */
+    private final boolean playerOnly;
+
+    /**
+     * The permission node that the command source must have
+     */
+    private final String permission;
+
+    /**
+     * The command manager to delegate permission checks to
+     */
+    private final CommandManager<GeyserCommandSource> manager;
+
+    @Override
+    public @NonNull Result testPermission(@NonNull GeyserCommandSource source) {
+        if (bedrockOnly) {
+            if (source.connection() == null) {
+                return new Result(Meta.NOT_BEDROCK);
+            }
+            // connection is present -> it is a player -> playerOnly is irrelevant
+        } else if (playerOnly) {
+            if (source.isConsole()) {
+                return new Result(Meta.NOT_PLAYER); // must be a player but is console
+            }
+        }
+
+        if (permission.isBlank() || manager.hasPermission(source, permission)) {
+            return new Result(Meta.ALLOWED);
+        }
+        return new Result(Meta.NO_PERMISSION);
+    }
+
+    @Override
+    public @NonNull CloudKey<Void> key() {
+        return CloudKey.cloudKey(permission);
+    }
+
+    /**
+     * Basic implementation of cloud's {@link PermissionResult} that delegates to the more informative {@link Meta}.
+     */
+    public final class Result implements PermissionResult {
+
+        private final Meta meta;
+
+        private Result(Meta meta) {
+            this.meta = meta;
+        }
+
+        public Meta meta() {
+            return meta;
+        }
+
+        @Override
+        public boolean allowed() {
+            return meta == Meta.ALLOWED;
+        }
+
+        @Override
+        public @NonNull Permission permission() {
+            return GeyserPermission.this;
+        }
+
+        /**
+         * More detailed explanation of whether the permission check passed.
+         */
+        public enum Meta {
+
+            /**
+             * The source must be a bedrock player, but is not.
+             */
+            NOT_BEDROCK,
+
+            /**
+             * The source must be a player, but is not.
+             */
+            NOT_PLAYER,
+
+            /**
+             * The source does not have a required permission node.
+             */
+            NO_PERMISSION,
+
+            /**
+             * The source meets all requirements.
+             */
+            ALLOWED
+        }
+    }
+}

core/src/main/java/org/geysermc/geyser/command/defaults/AdvancedTooltipsCommand.java

@@ -25,33 +25,32 @@
 
 package org.geysermc.geyser.command.defaults;
 
+import org.geysermc.geyser.api.util.TriState;
 import org.geysermc.geyser.command.GeyserCommand;
 import org.geysermc.geyser.command.GeyserCommandSource;
 import org.geysermc.geyser.session.GeyserSession;
+import org.geysermc.geyser.text.ChatColor;
 import org.geysermc.geyser.text.MinecraftLocale;
+import org.incendo.cloud.context.CommandContext;
+
+import java.util.Objects;
 
 public class AdvancedTooltipsCommand extends GeyserCommand {
+
     public AdvancedTooltipsCommand(String name, String description, String permission) {
-        super(name, description, permission);
+        super(name, description, permission, TriState.TRUE, true, true);
     }
 
     @Override
-    public void execute(GeyserSession session, GeyserCommandSource sender, String[] args) {
+    public void execute(CommandContext<GeyserCommandSource> context) {
-        if (session != null) {
+        GeyserSession session = Objects.requireNonNull(context.sender().connection());
+
         String onOrOff = session.isAdvancedTooltips() ? "off" : "on";
         session.setAdvancedTooltips(!session.isAdvancedTooltips());
-            session.sendMessage("§l§e" + MinecraftLocale.getLocaleString("debug.prefix", session.locale()) + " §r" + MinecraftLocale.getLocaleString("debug.advanced_tooltips." + onOrOff, session.locale()));
+        session.sendMessage(ChatColor.BOLD + ChatColor.YELLOW
+            + MinecraftLocale.getLocaleString("debug.prefix", session.locale())
+            + " " + ChatColor.RESET
+            + MinecraftLocale.getLocaleString("debug.advanced_tooltips." + onOrOff, session.locale()));
         session.getInventoryTranslator().updateInventory(session, session.getPlayerInventory());
     }
 }
-
-    @Override
-    public boolean isExecutableOnConsole() {
-        return false;
-    }
-
-    @Override
-    public boolean isBedrockOnly() {
-        return true;
-    }
-}

core/src/main/java/org/geysermc/geyser/command/defaults/AdvancementsCommand.java

@@ -25,29 +25,23 @@
 
 package org.geysermc.geyser.command.defaults;
 
+import org.geysermc.geyser.api.util.TriState;
 import org.geysermc.geyser.command.GeyserCommand;
 import org.geysermc.geyser.command.GeyserCommandSource;
 import org.geysermc.geyser.session.GeyserSession;
+import org.incendo.cloud.context.CommandContext;
+
+import java.util.Objects;
 
 public class AdvancementsCommand extends GeyserCommand {
+
     public AdvancementsCommand(String name, String description, String permission) {
-        super(name, description, permission);
+        super(name, description, permission, TriState.TRUE, true, true);
     }
 
     @Override
-    public void execute(GeyserSession session, GeyserCommandSource sender, String[] args) {
+    public void execute(CommandContext<GeyserCommandSource> context) {
-        if (session != null) {
+        GeyserSession session = Objects.requireNonNull(context.sender().connection());
         session.getAdvancementsCache().buildAndShowMenuForm();
     }
 }
-
-    @Override
-    public boolean isExecutableOnConsole() {
-        return false;
-    }
-
-    @Override
-    public boolean isBedrockOnly() {
-        return true;
-    }
-}

core/src/main/java/org/geysermc/geyser/command/defaults/ConnectionTestCommand.java

@@ -26,90 +26,82 @@
 package org.geysermc.geyser.command.defaults;
 
 import com.fasterxml.jackson.databind.JsonNode;
-import org.checkerframework.checker.nullness.qual.Nullable;
 import org.geysermc.geyser.GeyserImpl;
-import org.geysermc.geyser.api.util.PlatformType;
+import org.geysermc.geyser.api.util.TriState;
 import org.geysermc.geyser.command.GeyserCommand;
 import org.geysermc.geyser.command.GeyserCommandSource;
 import org.geysermc.geyser.configuration.GeyserConfiguration;
-import org.geysermc.geyser.session.GeyserSession;
-import org.geysermc.geyser.text.GeyserLocale;
 import org.geysermc.geyser.util.LoopbackUtil;
 import org.geysermc.geyser.util.WebUtils;
+import org.incendo.cloud.CommandManager;
+import org.incendo.cloud.context.CommandContext;
 
 import java.net.URLEncoder;
 import java.nio.charset.StandardCharsets;
 import java.util.Random;
 import java.util.concurrent.CompletableFuture;
 
+import static org.incendo.cloud.parser.standard.IntegerParser.integerParser;
+import static org.incendo.cloud.parser.standard.StringParser.stringParser;
+
 public class ConnectionTestCommand extends GeyserCommand {
+
     /*
      * The MOTD is temporarily changed during the connection test.
      * This allows us to check if we are pinging the correct Geyser instance
      */
     public static String CONNECTION_TEST_MOTD = null;
 
-    private final GeyserImpl geyser;
+    private static final String ADDRESS = "address";
+    private static final String PORT = "port";
 
+    private final GeyserImpl geyser;
     private final Random random = new Random();
 
     public ConnectionTestCommand(GeyserImpl geyser, String name, String description, String permission) {
-        super(name, description, permission);
+        super(name, description, permission, TriState.NOT_SET);
         this.geyser = geyser;
     }
 
     @Override
-    public void execute(@Nullable GeyserSession session, GeyserCommandSource sender, String[] args) {
+    public void register(CommandManager<GeyserCommandSource> manager) {
-        // Only allow the console to create dumps on Geyser Standalone
+        manager.command(baseBuilder(manager)
-        if (!sender.isConsole() && geyser.getPlatformType() == PlatformType.STANDALONE) {
+            .required(ADDRESS, stringParser())
-            sender.sendMessage(GeyserLocale.getPlayerLocaleString("geyser.bootstrap.command.permission_fail", sender.locale()));
+            .optional(PORT, integerParser(0, 65535))
-            return;
+            .handler(this::execute));
     }
 
-        if (args.length == 0) {
+    @Override
-            sender.sendMessage("Provide the server IP and port you are trying to test Bedrock connections for. Example: `test.geysermc.org:19132`");
+    public void execute(CommandContext<GeyserCommandSource> context) {
-            return;
+        GeyserCommandSource source = context.sender();
-        }
+        String ipArgument = context.get(ADDRESS);
+        Integer portArgument = context.getOrDefault(PORT, null); // null if port was not specified
 
         // Replace "<" and ">" symbols if they are present to avoid the common issue of people including them
-        String[] fullAddress = args[0].replace("<", "").replace(">", "").split(":", 2);
+        final String ip = ipArgument.replace("<", "").replace(">", "");
-
+        final int port = portArgument != null ? portArgument : geyser.getConfig().getBedrock().broadcastPort(); // default bedrock port
-        // Still allow people to not supply a port and fallback to 19132
-        int port;
-        if (fullAddress.length == 2) {
-            try {
-                port = Integer.parseInt(fullAddress[1]);
-            } catch (NumberFormatException e) {
-                // can occur if e.g. "/geyser connectiontest <ip>:<port> is ran
-                sender.sendMessage("Not a valid port! Specify a valid numeric port.");
-                return;
-            }
-        } else {
-            port = geyser.getConfig().getBedrock().broadcastPort();
-        }
-        String ip = fullAddress[0];
 
         // Issue: people commonly checking placeholders
         if (ip.equals("ip")) {
-            sender.sendMessage(ip + " is not a valid IP, and instead a placeholder. Please specify the IP to check.");
+            source.sendMessage(ip + " is not a valid IP, and instead a placeholder. Please specify the IP to check.");
             return;
         }
 
         // Issue: checking 0.0.0.0 won't work
         if (ip.equals("0.0.0.0")) {
-            sender.sendMessage("Please specify the IP that you would connect with. 0.0.0.0 in the config tells Geyser to the listen on the server's IPv4.");
+            source.sendMessage("Please specify the IP that you would connect with. 0.0.0.0 in the config tells Geyser to the listen on the server's IPv4.");
             return;
         }
 
         // Issue: people testing local ip
         if (ip.equals("localhost") || ip.startsWith("127.") || ip.startsWith("10.") || ip.startsWith("192.168.")) {
-            sender.sendMessage("This tool checks if connections from other networks are possible, so you cannot check a local IP.");
+            source.sendMessage("This tool checks if connections from other networks are possible, so you cannot check a local IP.");
             return;
         }
 
         // Issue: port out of bounds
         if (port <= 0 || port >= 65535) {
-            sender.sendMessage("The port you specified is invalid! Please specify a valid port.");
+            source.sendMessage("The port you specified is invalid! Please specify a valid port.");
             return;
         }
 
@@ -118,37 +110,37 @@ public class ConnectionTestCommand extends GeyserCommand {
         // Issue: do the ports not line up? We only check this if players don't override the broadcast port - if they do, they (hopefully) know what they're doing
         if (config.getBedrock().broadcastPort() == config.getBedrock().port()) {
             if (port != config.getBedrock().port()) {
-                if (fullAddress.length == 2) {
+                if (portArgument != null) {
-                    sender.sendMessage("The port you are testing with (" + port + ") is not the same as you set in your Geyser configuration ("
+                    source.sendMessage("The port you are testing with (" + port + ") is not the same as you set in your Geyser configuration ("
                             + config.getBedrock().port() + ")");
-                    sender.sendMessage("Re-run the command with the port in the config, or change the `bedrock` `port` in the config.");
+                    source.sendMessage("Re-run the command with the port in the config, or change the `bedrock` `port` in the config.");
                     if (config.getBedrock().isCloneRemotePort()) {
-                        sender.sendMessage("You have `clone-remote-port` enabled. This option ignores the `bedrock` `port` in the config, and uses the Java server port instead.");
+                        source.sendMessage("You have `clone-remote-port` enabled. This option ignores the `bedrock` `port` in the config, and uses the Java server port instead.");
                     }
                 } else {
-                    sender.sendMessage("You did not specify the port to check (add it with \":<port>\"), " +
+                    source.sendMessage("You did not specify the port to check (add it with \":<port>\"), " +
                             "and the default port 19132 does not match the port in your Geyser configuration ("
                             + config.getBedrock().port() + ")!");
-                    sender.sendMessage("Re-run the command with that port, or change the port in the config under `bedrock` `port`.");
+                    source.sendMessage("Re-run the command with that port, or change the port in the config under `bedrock` `port`.");
                 }
             }
         } else {
             if (config.getBedrock().broadcastPort() != port) {
-                sender.sendMessage("The port you are testing with (" + port + ") is not the same as the broadcast port set in your Geyser configuration ("
+                source.sendMessage("The port you are testing with (" + port + ") is not the same as the broadcast port set in your Geyser configuration ("
                         + config.getBedrock().broadcastPort() + "). ");
-                sender.sendMessage("You ONLY need to change the broadcast port if clients connects with a port different from the port Geyser is running on.");
+                source.sendMessage("You ONLY need to change the broadcast port if clients connects with a port different from the port Geyser is running on.");
-                sender.sendMessage("Re-run the command with the port in the config, or change the `bedrock` `broadcast-port` in the config.");
+                source.sendMessage("Re-run the command with the port in the config, or change the `bedrock` `broadcast-port` in the config.");
             }
         }
 
         // Issue: is the `bedrock` `address` in the config different?
         if (!config.getBedrock().address().equals("0.0.0.0")) {
-            sender.sendMessage("The address specified in `bedrock` `address` is not \"0.0.0.0\" - this may cause issues unless this is deliberate and intentional.");
+            source.sendMessage("The address specified in `bedrock` `address` is not \"0.0.0.0\" - this may cause issues unless this is deliberate and intentional.");
         }
 
         // Issue: did someone turn on enable-proxy-protocol, and they didn't mean it?
         if (config.getBedrock().isEnableProxyProtocol()) {
-            sender.sendMessage("You have the `enable-proxy-protocol` setting enabled. " +
+            source.sendMessage("You have the `enable-proxy-protocol` setting enabled. " +
                     "Unless you're deliberately using additional software that REQUIRES this setting, you may not need it enabled.");
         }
 
@@ -157,14 +149,14 @@ public class ConnectionTestCommand extends GeyserCommand {
                 // Issue: SRV record?
                 String[] record = WebUtils.findSrvRecord(geyser, ip);
                 if (record != null && !ip.equals(record[3]) && !record[2].equals(String.valueOf(port))) {
-                    sender.sendMessage("Bedrock Edition does not support SRV records. Try connecting to your server using the address " + record[3] + " and the port " + record[2]
+                    source.sendMessage("Bedrock Edition does not support SRV records. Try connecting to your server using the address " + record[3] + " and the port " + record[2]
                             + ". If that fails, re-run this command with that address and port.");
                     return;
                 }
 
                 // Issue: does Loopback need applying?
                 if (LoopbackUtil.needsLoopback(GeyserImpl.getInstance().getLogger())) {
-                    sender.sendMessage("Loopback is not applied on this computer! You will have issues connecting from the same computer. " +
+                    source.sendMessage("Loopback is not applied on this computer! You will have issues connecting from the same computer. " +
                             "See here for steps on how to resolve: " + "https://wiki.geysermc.org/geyser/fixing-unable-to-connect-to-world/#using-geyser-on-the-same-computer");
                 }
 
@@ -178,7 +170,7 @@ public class ConnectionTestCommand extends GeyserCommand {
                 String connectionTestMotd = "Geyser Connection Test " + randomStr;
                 CONNECTION_TEST_MOTD = connectionTestMotd;
 
-                sender.sendMessage("Testing server connection to " + ip + " with port: " + port + " now. Please wait...");
+                source.sendMessage("Testing server connection to " + ip + " with port: " + port + " now. Please wait...");
                 JsonNode output;
                 try {
                     String hostname = URLEncoder.encode(ip, StandardCharsets.UTF_8);
@@ -200,31 +192,31 @@ public class ConnectionTestCommand extends GeyserCommand {
                     JsonNode pong = ping.get("pong");
                     String remoteMotd = pong.get("motd").asText();
                     if (!connectionTestMotd.equals(remoteMotd)) {
-                        sender.sendMessage("The MOTD did not match when we pinged the server (we got '" + remoteMotd + "'). " +
+                        source.sendMessage("The MOTD did not match when we pinged the server (we got '" + remoteMotd + "'). " +
                                 "Did you supply the correct IP and port of your server?");
-                        sendLinks(sender);
+                        sendLinks(source);
                         return;
                     }
 
                     if (ping.get("tcpFirst").asBoolean()) {
-                        sender.sendMessage("Your server hardware likely has some sort of firewall preventing people from joining easily. See https://geysermc.link/ovh-firewall for more information.");
+                        source.sendMessage("Your server hardware likely has some sort of firewall preventing people from joining easily. See https://geysermc.link/ovh-firewall for more information.");
-                        sendLinks(sender);
+                        sendLinks(source);
                         return;
                     }
 
-                    sender.sendMessage("Your server is likely online and working as of " + when + "!");
+                    source.sendMessage("Your server is likely online and working as of " + when + "!");
-                    sendLinks(sender);
+                    sendLinks(source);
                     return;
                 }
 
-                sender.sendMessage("Your server is likely unreachable from outside the network!");
+                source.sendMessage("Your server is likely unreachable from outside the network!");
                 JsonNode message = output.get("message");
                 if (message != null && !message.asText().isEmpty()) {
-                    sender.sendMessage("Got the error message: " + message.asText());
+                    source.sendMessage("Got the error message: " + message.asText());
                 }
-                sendLinks(sender);
+                sendLinks(source);
             } catch (Exception e) {
-                sender.sendMessage("An error occurred while trying to check your connection! Check the console for more information.");
+                source.sendMessage("An error occurred while trying to check your connection! Check the console for more information.");
                 geyser.getLogger().error("Error while trying to check your connection!", e);
             }
         });
@@ -235,9 +227,4 @@ public class ConnectionTestCommand extends GeyserCommand {
                 "https://wiki.geysermc.org/geyser/setup/");
         sender.sendMessage("If that does not work, see " + "https://wiki.geysermc.org/geyser/fixing-unable-to-connect-to-world/" + ", or contact us on Discord: " + "https://discord.gg/geysermc");
     }
-
-    @Override
-    public boolean isSuggestedOpOnly() {
-        return true;
-    }
 }

core/src/main/java/org/geysermc/geyser/command/defaults/DumpCommand.java

@@ -29,43 +29,71 @@ import com.fasterxml.jackson.core.util.DefaultIndenter;
 import com.fasterxml.jackson.core.util.DefaultPrettyPrinter;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
-import org.checkerframework.checker.nullness.qual.NonNull;
-import org.geysermc.geyser.api.util.PlatformType;
 import org.geysermc.geyser.GeyserImpl;
+import org.geysermc.geyser.api.util.TriState;
 import org.geysermc.geyser.command.GeyserCommand;
 import org.geysermc.geyser.command.GeyserCommandSource;
 import org.geysermc.geyser.dump.DumpInfo;
-import org.geysermc.geyser.session.GeyserSession;
 import org.geysermc.geyser.text.AsteriskSerializer;
 import org.geysermc.geyser.text.ChatColor;
 import org.geysermc.geyser.text.GeyserLocale;
 import org.geysermc.geyser.util.WebUtils;
+import org.incendo.cloud.CommandManager;
+import org.incendo.cloud.context.CommandContext;
+import org.incendo.cloud.suggestion.SuggestionProvider;
 
 import java.io.FileOutputStream;
 import java.io.IOException;
-import java.util.Arrays;
+import java.util.ArrayList;
 import java.util.List;
 
+import static org.incendo.cloud.parser.standard.StringArrayParser.stringArrayParser;
+
 public class DumpCommand extends GeyserCommand {
 
+    private static final String ARGUMENTS = "args";
+    private static final Iterable<String> SUGGESTIONS = List.of("full", "offline", "logs");
+
     private final GeyserImpl geyser;
     private static final ObjectMapper MAPPER = new ObjectMapper();
     private static final String DUMP_URL = "https://dump.geysermc.org/";
 
     public DumpCommand(GeyserImpl geyser, String name, String description, String permission) {
-        super(name, description, permission);
+        super(name, description, permission, TriState.NOT_SET);
-
         this.geyser = geyser;
     }
 
     @Override
-    public void execute(GeyserSession session, GeyserCommandSource sender, String[] args) {
+    public void register(CommandManager<GeyserCommandSource> manager) {
-        // Only allow the console to create dumps on Geyser Standalone
+        manager.command(baseBuilder(manager)
-        if (!sender.isConsole() && geyser.getPlatformType() == PlatformType.STANDALONE) {
+            .optional(ARGUMENTS, stringArrayParser(), SuggestionProvider.blockingStrings((ctx, input) -> {
-            sender.sendMessage(GeyserLocale.getPlayerLocaleString("geyser.bootstrap.command.permission_fail", sender.locale()));
+                // parse suggestions here
-            return;
+                List<String> inputs = new ArrayList<>();
+                while (input.hasRemainingInput()) {
+                    inputs.add(input.readStringSkipWhitespace());
                 }
 
+                if (inputs.size() <= 2) {
+                    return SUGGESTIONS; // only `geyser dump` was typed (2 literals)
+                }
+
+                // the rest of the input after `geyser dump` is for this argument
+                inputs = inputs.subList(2, inputs.size());
+
+                // don't suggest any words they have already typed
+                List<String> suggestions = new ArrayList<>();
+                SUGGESTIONS.forEach(suggestions::add);
+                suggestions.removeAll(inputs);
+                return suggestions;
+            }))
+            .handler(this::execute));
+    }
+
+    @Override
+    public void execute(CommandContext<GeyserCommandSource> context) {
+        GeyserCommandSource source = context.sender();
+        String[] args = context.getOrDefault(ARGUMENTS, new String[0]);
+
         boolean showSensitive = false;
         boolean offlineDump = false;
         boolean addLog = false;
@@ -75,25 +103,28 @@ public class DumpCommand extends GeyserCommand {
                     case "full" -> showSensitive = true;
                     case "offline" -> offlineDump = true;
                     case "logs" -> addLog = true;
+                    default -> context.sender().sendMessage("Invalid geyser dump option " + arg + "! Fallback to no arguments.");
                 }
             }
         }
 
         AsteriskSerializer.showSensitive = showSensitive;
 
-        sender.sendMessage(GeyserLocale.getPlayerLocaleString("geyser.commands.dump.collecting", sender.locale()));
+        source.sendMessage(GeyserLocale.getPlayerLocaleString("geyser.commands.dump.collecting", source.locale()));
         String dumpData;
         try {
+            DumpInfo dump = new DumpInfo(geyser, addLog);
+
             if (offlineDump) {
                 DefaultPrettyPrinter prettyPrinter = new DefaultPrettyPrinter();
                 // Make arrays easier to read
                 prettyPrinter.indentArraysWith(new DefaultIndenter("    ", "\n"));
-                dumpData = MAPPER.writer(prettyPrinter).writeValueAsString(new DumpInfo(addLog));
+                dumpData = MAPPER.writer(prettyPrinter).writeValueAsString(dump);
             } else {
-                dumpData = MAPPER.writeValueAsString(new DumpInfo(addLog));
+                dumpData = MAPPER.writeValueAsString(dump);
             }
         } catch (IOException e) {
-            sender.sendMessage(ChatColor.RED + GeyserLocale.getPlayerLocaleString("geyser.commands.dump.collect_error", sender.locale()));
+            source.sendMessage(ChatColor.RED + GeyserLocale.getPlayerLocaleString("geyser.commands.dump.collect_error", source.locale()));
             geyser.getLogger().error(GeyserLocale.getLocaleStringLog("geyser.commands.dump.collect_error_short"), e);
             return;
         }
@@ -101,21 +132,21 @@ public class DumpCommand extends GeyserCommand {
         String uploadedDumpUrl;
 
         if (offlineDump) {
-            sender.sendMessage(GeyserLocale.getPlayerLocaleString("geyser.commands.dump.writing", sender.locale()));
+            source.sendMessage(GeyserLocale.getPlayerLocaleString("geyser.commands.dump.writing", source.locale()));
 
             try {
                 FileOutputStream outputStream = new FileOutputStream(GeyserImpl.getInstance().getBootstrap().getConfigFolder().resolve("dump.json").toFile());
                 outputStream.write(dumpData.getBytes());
                 outputStream.close();
             } catch (IOException e) {
-                sender.sendMessage(ChatColor.RED + GeyserLocale.getPlayerLocaleString("geyser.commands.dump.write_error", sender.locale()));
+                source.sendMessage(ChatColor.RED + GeyserLocale.getPlayerLocaleString("geyser.commands.dump.write_error", source.locale()));
                 geyser.getLogger().error(GeyserLocale.getLocaleStringLog("geyser.commands.dump.write_error_short"), e);
                 return;
             }
 
             uploadedDumpUrl = "dump.json";
         } else {
-            sender.sendMessage(GeyserLocale.getPlayerLocaleString("geyser.commands.dump.uploading", sender.locale()));
+            source.sendMessage(GeyserLocale.getPlayerLocaleString("geyser.commands.dump.uploading", source.locale()));
 
             String response;
             JsonNode responseNode;
@@ -123,33 +154,22 @@ public class DumpCommand extends GeyserCommand {
                 response = WebUtils.post(DUMP_URL + "documents", dumpData);
                 responseNode = MAPPER.readTree(response);
             } catch (IOException e) {
-                sender.sendMessage(ChatColor.RED + GeyserLocale.getPlayerLocaleString("geyser.commands.dump.upload_error", sender.locale()));
+                source.sendMessage(ChatColor.RED + GeyserLocale.getPlayerLocaleString("geyser.commands.dump.upload_error", source.locale()));
                 geyser.getLogger().error(GeyserLocale.getLocaleStringLog("geyser.commands.dump.upload_error_short"), e);
                 return;
             }
 
             if (!responseNode.has("key")) {
-                sender.sendMessage(ChatColor.RED + GeyserLocale.getPlayerLocaleString("geyser.commands.dump.upload_error_short", sender.locale()) + ": " + (responseNode.has("message") ? responseNode.get("message").asText() : response));
+                source.sendMessage(ChatColor.RED + GeyserLocale.getPlayerLocaleString("geyser.commands.dump.upload_error_short", source.locale()) + ": " + (responseNode.has("message") ? responseNode.get("message").asText() : response));
                 return;
             }
 
             uploadedDumpUrl = DUMP_URL + responseNode.get("key").asText();
         }
 
-        sender.sendMessage(GeyserLocale.getPlayerLocaleString("geyser.commands.dump.message", sender.locale()) + " " + ChatColor.DARK_AQUA + uploadedDumpUrl);
+        source.sendMessage(GeyserLocale.getPlayerLocaleString("geyser.commands.dump.message", source.locale()) + " " + ChatColor.DARK_AQUA + uploadedDumpUrl);
-        if (!sender.isConsole()) {
+        if (!source.isConsole()) {
-            geyser.getLogger().info(GeyserLocale.getLocaleStringLog("geyser.commands.dump.created", sender.name(), uploadedDumpUrl));
+            geyser.getLogger().info(GeyserLocale.getLocaleStringLog("geyser.commands.dump.created", source.name(), uploadedDumpUrl));
         }
     }
-
-    @NonNull
-    @Override
-    public List<String> subCommands() {
-        return Arrays.asList("offline", "full", "logs");
-    }
-
-    @Override
-    public boolean isSuggestedOpOnly() {
-        return true;
-    }
 }

core/src/main/java/org/geysermc/geyser/command/defaults/ExtensionsCommand.java

@@ -25,14 +25,14 @@
 
 package org.geysermc.geyser.command.defaults;
 
-import org.checkerframework.checker.nullness.qual.Nullable;
 import org.geysermc.geyser.GeyserImpl;
 import org.geysermc.geyser.api.extension.Extension;
+import org.geysermc.geyser.api.util.TriState;
 import org.geysermc.geyser.command.GeyserCommand;
 import org.geysermc.geyser.command.GeyserCommandSource;
-import org.geysermc.geyser.session.GeyserSession;
 import org.geysermc.geyser.text.ChatColor;
 import org.geysermc.geyser.text.GeyserLocale;
+import org.incendo.cloud.context.CommandContext;
 
 import java.util.Comparator;
 import java.util.List;
@@ -41,22 +41,23 @@ public class ExtensionsCommand extends GeyserCommand {
     private final GeyserImpl geyser;
 
     public ExtensionsCommand(GeyserImpl geyser, String name, String description, String permission) {
-        super(name, description, permission);
+        super(name, description, permission, TriState.TRUE);
-
         this.geyser = geyser;
     }
 
     @Override
-    public void execute(@Nullable GeyserSession session, GeyserCommandSource sender, String[] args) {
+    public void execute(CommandContext<GeyserCommandSource> context) {
+        GeyserCommandSource source = context.sender();
+
         // TODO: Pagination
         int page = 1;
         int maxPage = 1;
-        String header = GeyserLocale.getPlayerLocaleString("geyser.commands.extensions.header", sender.locale(), page, maxPage);
+        String header = GeyserLocale.getPlayerLocaleString("geyser.commands.extensions.header", source.locale(), page, maxPage);
-        sender.sendMessage(header);
+        source.sendMessage(header);
 
         this.geyser.extensionManager().extensions().stream().sorted(Comparator.comparing(Extension::name)).forEach(extension -> {
             String extensionName = (extension.isEnabled() ? ChatColor.GREEN : ChatColor.RED) + extension.name();
-            sender.sendMessage("- " + extensionName + ChatColor.RESET + " v" + extension.description().version() + formatAuthors(extension.description().authors()));
+            source.sendMessage("- " + extensionName + ChatColor.RESET + " v" + extension.description().version() + formatAuthors(extension.description().authors()));
         });
     }
 

core/src/main/java/org/geysermc/geyser/command/defaults/HelpCommand.java

@@ -25,61 +25,59 @@
 
 package org.geysermc.geyser.command.defaults;
 
-import org.geysermc.geyser.api.util.PlatformType;
+import com.google.common.base.Predicates;
-import org.geysermc.geyser.GeyserImpl;
 import org.geysermc.geyser.api.command.Command;
+import org.geysermc.geyser.api.util.TriState;
 import org.geysermc.geyser.command.GeyserCommand;
 import org.geysermc.geyser.command.GeyserCommandSource;
-import org.geysermc.geyser.session.GeyserSession;
 import org.geysermc.geyser.text.ChatColor;
 import org.geysermc.geyser.text.GeyserLocale;
+import org.incendo.cloud.context.CommandContext;
 
+import java.util.Collection;
 import java.util.Collections;
+import java.util.Comparator;
 import java.util.Map;
 
 public class HelpCommand extends GeyserCommand {
-    private final GeyserImpl geyser;
+    private final String rootCommand;
-    private final String baseCommand;
+    private final Collection<GeyserCommand> commands;
-    private final Map<String, Command> commands;
 
-    public HelpCommand(GeyserImpl geyser, String name, String description, String permission,
+    public HelpCommand(String rootCommand, String name, String description, String permission, Map<String, GeyserCommand> commands) {
-                       String baseCommand, Map<String, Command> commands) {
+        super(name, description, permission, TriState.TRUE);
-        super(name, description, permission);
+        this.rootCommand = rootCommand;
-        this.geyser = geyser;
+        this.commands = commands.values();
-        this.baseCommand = baseCommand;
+        this.aliases = Collections.singletonList("?");
-        this.commands = commands;
-
-        this.setAliases(Collections.singletonList("?"));
     }
 
-    /**
-     * Sends the help menu to a command sender. Will not show certain commands depending on the command sender and session.
-     *
-     * @param session The Geyser session of the command sender, if it is a bedrock player. If null, bedrock-only commands will be hidden.
-     * @param sender The CommandSender to send the help message to.
-     * @param args Not used.
-     */
     @Override
-    public void execute(GeyserSession session, GeyserCommandSource sender, String[] args) {
+    public String rootCommand() {
+        return rootCommand;
+    }
+
+    @Override
+    public void execute(CommandContext<GeyserCommandSource> context) {
+        execute(context.sender());
+    }
+
+    public void execute(GeyserCommandSource source) {
+        boolean bedrockPlayer = source.connection() != null;
+
+        // todo: pagination
         int page = 1;
         int maxPage = 1;
-        String translationKey = this.baseCommand.equals("geyser") ? "geyser.commands.help.header" : "geyser.commands.extensions.header";
+        String translationKey = this.rootCommand.equals(DEFAULT_ROOT_COMMAND) ? "geyser.commands.help.header" : "geyser.commands.extensions.header";
-        String header = GeyserLocale.getPlayerLocaleString(translationKey, sender.locale(), page, maxPage);
+        String header = GeyserLocale.getPlayerLocaleString(translationKey, source.locale(), page, maxPage);
-        sender.sendMessage(header);
+        source.sendMessage(header);
 
-        this.commands.entrySet().stream().sorted(Map.Entry.comparingByKey()).forEach(entry -> {
+        this.commands.stream()
-            Command cmd = entry.getValue();
+            .distinct() // remove aliases
-
+            .filter(bedrockPlayer ? Predicates.alwaysTrue() : cmd -> !cmd.isBedrockOnly()) // remove bedrock only commands if not a bedrock player
-            // Standalone hack-in since it doesn't have a concept of permissions
+            .filter(cmd -> source.hasPermission(cmd.permission()))
-            if (geyser.getPlatformType() == PlatformType.STANDALONE || sender.hasPermission(cmd.permission())) {
+            .sorted(Comparator.comparing(Command::name))
-                // Only list commands the player can actually run
+            .forEachOrdered(cmd -> {
-                if (cmd.isBedrockOnly() && session == null) {
+                String description = GeyserLocale.getPlayerLocaleString(cmd.description(), source.locale());
-                    return;
+                source.sendMessage(ChatColor.YELLOW + "/" + rootCommand + " " + cmd.name() + ChatColor.WHITE + ": " + description);
-                }
-
-                sender.sendMessage(ChatColor.YELLOW + "/" + baseCommand + " " + entry.getKey() + ChatColor.WHITE + ": " +
-                        GeyserLocale.getPlayerLocaleString(cmd.description(), sender.locale()));
-            }
             });
     }
 }

core/src/main/java/org/geysermc/geyser/command/defaults/ListCommand.java

@@ -26,10 +26,12 @@
 package org.geysermc.geyser.command.defaults;
 
 import org.geysermc.geyser.GeyserImpl;
+import org.geysermc.geyser.api.util.TriState;
 import org.geysermc.geyser.command.GeyserCommand;
 import org.geysermc.geyser.command.GeyserCommandSource;
 import org.geysermc.geyser.session.GeyserSession;
 import org.geysermc.geyser.text.GeyserLocale;
+import org.incendo.cloud.context.CommandContext;
 
 import java.util.stream.Collectors;
 
@@ -38,22 +40,18 @@ public class ListCommand extends GeyserCommand {
     private final GeyserImpl geyser;
 
     public ListCommand(GeyserImpl geyser, String name, String description, String permission) {
-        super(name, description, permission);
+        super(name, description, permission, TriState.NOT_SET);
-
         this.geyser = geyser;
     }
 
     @Override
-    public void execute(GeyserSession session, GeyserCommandSource sender, String[] args) {
+    public void execute(CommandContext<GeyserCommandSource> context) {
-        String message = GeyserLocale.getPlayerLocaleString("geyser.commands.list.message", sender.locale(),
+        GeyserCommandSource source = context.sender();
+
+        String message = GeyserLocale.getPlayerLocaleString("geyser.commands.list.message", source.locale(),
             geyser.getSessionManager().size(),
             geyser.getSessionManager().getAllSessions().stream().map(GeyserSession::bedrockUsername).collect(Collectors.joining(" ")));
 
-        sender.sendMessage(message);
+        source.sendMessage(message);
-    }
-
-    @Override
-    public boolean isSuggestedOpOnly() {
-        return true;
     }
 }

core/src/main/java/org/geysermc/geyser/command/defaults/OffhandCommand.java

@@ -25,33 +25,23 @@
 
 package org.geysermc.geyser.command.defaults;
 
-import org.geysermc.geyser.GeyserImpl;
+import org.geysermc.geyser.api.util.TriState;
 import org.geysermc.geyser.command.GeyserCommand;
 import org.geysermc.geyser.command.GeyserCommandSource;
 import org.geysermc.geyser.session.GeyserSession;
+import org.incendo.cloud.context.CommandContext;
+
+import java.util.Objects;
 
 public class OffhandCommand extends GeyserCommand {
 
-    public OffhandCommand(GeyserImpl geyser, String name, String description, String permission) {
+    public OffhandCommand(String name, String description, String permission) {
-        super(name, description, permission);
+        super(name, description, permission, TriState.TRUE, true, true);
     }
 
     @Override
-    public void execute(GeyserSession session, GeyserCommandSource sender, String[] args) {
+    public void execute(CommandContext<GeyserCommandSource> context) {
-        if (session == null) {
+        GeyserSession session = Objects.requireNonNull(context.sender().connection());
-            return;
-        }
-
         session.requestOffhandSwap();
     }
-
-    @Override
-    public boolean isExecutableOnConsole() {
-        return false;
-    }
-
-    @Override
-    public boolean isBedrockOnly() {
-        return true;
-    }
 }

core/src/main/java/org/geysermc/geyser/command/defaults/PingCommand.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2019-2023 GeyserMC. http://geysermc.org
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @author GeyserMC
+ * @link https://github.com/GeyserMC/Geyser
+ */
+
+package org.geysermc.geyser.command.defaults;
+
+import org.geysermc.geyser.api.util.TriState;
+import org.geysermc.geyser.command.GeyserCommand;
+import org.geysermc.geyser.command.GeyserCommandSource;
+import org.geysermc.geyser.session.GeyserSession;
+import org.geysermc.geyser.text.GeyserLocale;
+import org.incendo.cloud.context.CommandContext;
+
+import java.util.Objects;
+
+public class PingCommand extends GeyserCommand {
+
+    public PingCommand(String name, String description, String permission) {
+        super(name, description, permission, TriState.TRUE, true, true);
+    }
+
+    @Override
+    public void execute(CommandContext<GeyserCommandSource> context) {
+        GeyserSession session = Objects.requireNonNull(context.sender().connection());
+        session.sendMessage(GeyserLocale.getPlayerLocaleString("geyser.commands.ping.message", session.locale(), session.ping()));
+    }
+}
+

core/src/main/java/org/geysermc/geyser/command/defaults/ReloadCommand.java

@@ -25,12 +25,12 @@
 
 package org.geysermc.geyser.command.defaults;
 
-import org.geysermc.geyser.api.util.PlatformType;
 import org.geysermc.geyser.GeyserImpl;
+import org.geysermc.geyser.api.util.TriState;
 import org.geysermc.geyser.command.GeyserCommand;
 import org.geysermc.geyser.command.GeyserCommandSource;
-import org.geysermc.geyser.session.GeyserSession;
 import org.geysermc.geyser.text.GeyserLocale;
+import org.incendo.cloud.context.CommandContext;
 
 import java.util.concurrent.TimeUnit;
 
@@ -39,27 +39,17 @@ public class ReloadCommand extends GeyserCommand {
     private final GeyserImpl geyser;
 
     public ReloadCommand(GeyserImpl geyser, String name, String description, String permission) {
-        super(name, description, permission);
+        super(name, description, permission, TriState.NOT_SET);
         this.geyser = geyser;
     }
 
     @Override
-    public void execute(GeyserSession session, GeyserCommandSource sender, String[] args) {
+    public void execute(CommandContext<GeyserCommandSource> context) {
-        if (!sender.isConsole() && geyser.getPlatformType() == PlatformType.STANDALONE) {
+        GeyserCommandSource source = context.sender();
-            return;
+        source.sendMessage(GeyserLocale.getPlayerLocaleString("geyser.commands.reload.message", source.locale()));
-        }
-
-        String message = GeyserLocale.getPlayerLocaleString("geyser.commands.reload.message", sender.locale());
-
-        sender.sendMessage(message);
 
         geyser.getSessionManager().disconnectAll("geyser.commands.reload.kick");
         //FIXME Without the tiny wait, players do not get kicked - same happens when Geyser tries to disconnect all sessions on shutdown
         geyser.getScheduledThread().schedule(geyser::reloadGeyser, 10, TimeUnit.MILLISECONDS);
     }
-
-    @Override
-    public boolean isSuggestedOpOnly() {
-        return true;
-    }
 }

core/src/main/java/org/geysermc/geyser/command/defaults/SettingsCommand.java

@@ -25,31 +25,24 @@
 
 package org.geysermc.geyser.command.defaults;
 
-import org.geysermc.geyser.GeyserImpl;
+import org.geysermc.geyser.api.util.TriState;
 import org.geysermc.geyser.command.GeyserCommand;
 import org.geysermc.geyser.command.GeyserCommandSource;
 import org.geysermc.geyser.session.GeyserSession;
 import org.geysermc.geyser.util.SettingsUtils;
+import org.incendo.cloud.context.CommandContext;
+
+import java.util.Objects;
 
 public class SettingsCommand extends GeyserCommand {
-    public SettingsCommand(GeyserImpl geyser, String name, String description, String permission) {
+
-        super(name, description, permission);
+    public SettingsCommand(String name, String description, String permission) {
+        super(name, description, permission, TriState.TRUE, true, true);
     }
 
     @Override
-    public void execute(GeyserSession session, GeyserCommandSource sender, String[] args) {
+    public void execute(CommandContext<GeyserCommandSource> context) {
-        if (session != null) {
+        GeyserSession session = Objects.requireNonNull(context.sender().connection());
         session.sendForm(SettingsUtils.buildForm(session));
     }
 }
-
-    @Override
-    public boolean isExecutableOnConsole() {
-        return false;
-    }
-
-    @Override
-    public boolean isBedrockOnly() {
-        return true;
-    }
-}

core/src/main/java/org/geysermc/geyser/command/defaults/StatisticsCommand.java

@@ -25,35 +25,28 @@
 
 package org.geysermc.geyser.command.defaults;
 
-import org.geysermc.geyser.GeyserImpl;
+import org.geysermc.geyser.api.util.TriState;
 import org.geysermc.geyser.command.GeyserCommand;
 import org.geysermc.geyser.command.GeyserCommandSource;
 import org.geysermc.geyser.session.GeyserSession;
 import org.geysermc.mcprotocollib.protocol.data.game.ClientCommand;
 import org.geysermc.mcprotocollib.protocol.packet.ingame.serverbound.ServerboundClientCommandPacket;
+import org.incendo.cloud.context.CommandContext;
+
+import java.util.Objects;
 
 public class StatisticsCommand extends GeyserCommand {
 
-    public StatisticsCommand(GeyserImpl geyser, String name, String description, String permission) {
+    public StatisticsCommand(String name, String description, String permission) {
-        super(name, description, permission);
+        super(name, description, permission, TriState.TRUE, true, true);
     }
 
     @Override
-    public void execute(GeyserSession session, GeyserCommandSource sender, String[] args) {
+    public void execute(CommandContext<GeyserCommandSource> context) {
-        if (session == null) return;
+        GeyserSession session = Objects.requireNonNull(context.sender().connection());
 
         session.setWaitingForStatistics(true);
-        ServerboundClientCommandPacket ServerboundClientCommandPacket = new ServerboundClientCommandPacket(ClientCommand.STATS);
+        ServerboundClientCommandPacket packet = new ServerboundClientCommandPacket(ClientCommand.STATS);
-        session.sendDownstreamGamePacket(ServerboundClientCommandPacket);
+        session.sendDownstreamGamePacket(packet);
-    }
-
-    @Override
-    public boolean isExecutableOnConsole() {
-        return false;
-    }
-
-    @Override
-    public boolean isBedrockOnly() {
-        return true;
     }
 }

core/src/main/java/org/geysermc/geyser/command/defaults/StopCommand.java

@@ -25,12 +25,11 @@
 
 package org.geysermc.geyser.command.defaults;
 
-import org.geysermc.geyser.api.util.PlatformType;
 import org.geysermc.geyser.GeyserImpl;
+import org.geysermc.geyser.api.util.TriState;
 import org.geysermc.geyser.command.GeyserCommand;
 import org.geysermc.geyser.command.GeyserCommandSource;
-import org.geysermc.geyser.session.GeyserSession;
+import org.incendo.cloud.context.CommandContext;
-import org.geysermc.geyser.text.GeyserLocale;
 
 import java.util.Collections;
 
@@ -39,24 +38,13 @@ public class StopCommand extends GeyserCommand {
     private final GeyserImpl geyser;
 
     public StopCommand(GeyserImpl geyser, String name, String description, String permission) {
-        super(name, description, permission);
+        super(name, description, permission, TriState.NOT_SET);
         this.geyser = geyser;
-
+        this.aliases = Collections.singletonList("shutdown");
-        this.setAliases(Collections.singletonList("shutdown"));
     }
 
     @Override
-    public void execute(GeyserSession session, GeyserCommandSource sender, String[] args) {
+    public void execute(CommandContext<GeyserCommandSource> context) {
-        if (!sender.isConsole() && geyser.getPlatformType() == PlatformType.STANDALONE) {
-            sender.sendMessage(GeyserLocale.getPlayerLocaleString("geyser.bootstrap.command.permission_fail", sender.locale()));
-            return;
-        }
-
         geyser.getBootstrap().onGeyserShutdown();
     }
-
-    @Override
-    public boolean isSuggestedOpOnly() {
-        return true;
-    }
 }

core/src/main/java/org/geysermc/geyser/command/defaults/VersionCommand.java

@@ -29,13 +29,14 @@ import com.fasterxml.jackson.databind.JsonNode;
 import org.cloudburstmc.protocol.bedrock.codec.BedrockCodec;
 import org.geysermc.geyser.GeyserImpl;
 import org.geysermc.geyser.api.util.PlatformType;
+import org.geysermc.geyser.api.util.TriState;
 import org.geysermc.geyser.command.GeyserCommand;
 import org.geysermc.geyser.command.GeyserCommandSource;
 import org.geysermc.geyser.network.GameProtocol;
-import org.geysermc.geyser.session.GeyserSession;
 import org.geysermc.geyser.text.ChatColor;
 import org.geysermc.geyser.text.GeyserLocale;
 import org.geysermc.geyser.util.WebUtils;
+import org.incendo.cloud.context.CommandContext;
 
 import java.io.IOException;
 import java.util.List;
@@ -45,13 +46,14 @@ public class VersionCommand extends GeyserCommand {
     private final GeyserImpl geyser;
 
     public VersionCommand(GeyserImpl geyser, String name, String description, String permission) {
-        super(name, description, permission);
+        super(name, description, permission, TriState.NOT_SET);
-
         this.geyser = geyser;
     }
 
     @Override
-    public void execute(GeyserSession session, GeyserCommandSource sender, String[] args) {
+    public void execute(CommandContext<GeyserCommandSource> context) {
+        GeyserCommandSource source = context.sender();
+
         String bedrockVersions;
         List<BedrockCodec> supportedCodecs = GameProtocol.SUPPORTED_BEDROCK_CODECS;
         if (supportedCodecs.size() > 1) {
@@ -67,45 +69,37 @@ public class VersionCommand extends GeyserCommand {
             javaVersions = supportedJavaVersions.get(0);
         }
 
-        sender.sendMessage(GeyserLocale.getPlayerLocaleString("geyser.commands.version.version", sender.locale(),
+        source.sendMessage(GeyserLocale.getPlayerLocaleString("geyser.commands.version.version", source.locale(),
                 GeyserImpl.NAME, GeyserImpl.VERSION, javaVersions, bedrockVersions));
 
         // Disable update checking in dev mode and for players in Geyser Standalone
-        if (!GeyserImpl.getInstance().isProductionEnvironment() || (!sender.isConsole() && geyser.getPlatformType() == PlatformType.STANDALONE)) {
+        if (!GeyserImpl.getInstance().isProductionEnvironment() || (!source.isConsole() && geyser.getPlatformType() == PlatformType.STANDALONE)) {
             return;
         }
 
         if (GeyserImpl.IS_DEV) {
-            // TODO cloud use language string
+            source.sendMessage(GeyserLocale.getPlayerLocaleString("geyser.core.dev_build", source.locale(), "https://discord.gg/geysermc"));
-            sender.sendMessage("You are running a development build of Geyser! Please report any bugs you find on our Discord server: %s"
-                    .formatted("https://discord.gg/geysermc"));
-            //sender.sendMessage(GeyserLocale.getPlayerLocaleString("geyser.core.dev_build", sender.locale(), "https://discord.gg/geysermc"));
             return;
         }
 
-        sender.sendMessage(GeyserLocale.getPlayerLocaleString("geyser.commands.version.checking", sender.locale()));
+        source.sendMessage(GeyserLocale.getPlayerLocaleString("geyser.commands.version.checking", source.locale()));
         try {
             int buildNumber = this.geyser.buildNumber();
             JsonNode response = WebUtils.getJson("https://download.geysermc.org/v2/projects/geyser/versions/latest/builds/latest");
             int latestBuildNumber = response.get("build").asInt();
 
             if (latestBuildNumber == buildNumber) {
-                sender.sendMessage(GeyserLocale.getPlayerLocaleString("geyser.commands.version.no_updates", sender.locale()));
+                source.sendMessage(GeyserLocale.getPlayerLocaleString("geyser.commands.version.no_updates", source.locale()));
                 return;
             }
 
-            sender.sendMessage(GeyserLocale.getPlayerLocaleString(
+            source.sendMessage(GeyserLocale.getPlayerLocaleString(
                     "geyser.commands.version.outdated",
-                    sender.locale(), (latestBuildNumber - buildNumber), "https://geysermc.org/download"
+                    source.locale(), (latestBuildNumber - buildNumber), "https://geysermc.org/download"
             ));
         } catch (IOException e) {
             GeyserImpl.getInstance().getLogger().error(GeyserLocale.getLocaleStringLog("geyser.commands.version.failed"), e);
-            sender.sendMessage(ChatColor.RED + GeyserLocale.getPlayerLocaleString("geyser.commands.version.failed", sender.locale()));
+            source.sendMessage(ChatColor.RED + GeyserLocale.getPlayerLocaleString("geyser.commands.version.failed", source.locale()));
         }
     }
-
-    @Override
-    public boolean isSuggestedOpOnly() {
-        return true;
-    }
 }

core/src/main/java/org/geysermc/geyser/command/standalone/PermissionConfiguration.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2019-2024 GeyserMC. http://geysermc.org
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @author GeyserMC
+ * @link https://github.com/GeyserMC/Geyser
+ */
+
+package org.geysermc.geyser.command.standalone;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import lombok.Getter;
+
+import java.util.Collections;
+import java.util.Set;
+
+@Getter
+@JsonIgnoreProperties(ignoreUnknown = true)
+@SuppressWarnings("FieldMayBeFinal") // Jackson requires that the fields are not final
+public class PermissionConfiguration {
+
+    @JsonProperty("default-permissions")
+    private Set<String> defaultPermissions = Collections.emptySet();
+}

core/src/main/java/org/geysermc/geyser/command/standalone/StandaloneCloudCommandManager.java

@@ -0,0 +1,126 @@
+/*
+ * Copyright (c) 2019-2024 GeyserMC. http://geysermc.org
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @author GeyserMC
+ * @link https://github.com/GeyserMC/Geyser
+ */
+
+package org.geysermc.geyser.command.standalone;
+
+import it.unimi.dsi.fastutil.objects.ObjectOpenHashSet;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.geysermc.geyser.GeyserImpl;
+import org.geysermc.geyser.api.event.lifecycle.GeyserRegisterPermissionCheckersEvent;
+import org.geysermc.geyser.api.event.lifecycle.GeyserRegisterPermissionsEvent;
+import org.geysermc.geyser.api.permission.PermissionChecker;
+import org.geysermc.geyser.api.util.TriState;
+import org.geysermc.geyser.command.CommandRegistry;
+import org.geysermc.geyser.command.GeyserCommandSource;
+import org.geysermc.geyser.util.FileUtils;
+import org.incendo.cloud.CommandManager;
+import org.incendo.cloud.execution.ExecutionCoordinator;
+import org.incendo.cloud.internal.CommandRegistrationHandler;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+import java.util.Set;
+
+public class StandaloneCloudCommandManager extends CommandManager<GeyserCommandSource> {
+
+    private final GeyserImpl geyser;
+
+    /**
+     * The checkers we use to test if a command source has a permission
+     */
+    private final List<PermissionChecker> permissionCheckers = new ArrayList<>();
+
+    /**
+     * Any permissions that all connections have
+     */
+    private final Set<String> basePermissions = new ObjectOpenHashSet<>();
+
+    public StandaloneCloudCommandManager(GeyserImpl geyser) {
+        super(ExecutionCoordinator.simpleCoordinator(), CommandRegistrationHandler.nullCommandRegistrationHandler());
+        // simpleCoordinator: execute commands immediately on the calling thread.
+        // nullCommandRegistrationHandler: cloud is not responsible for handling our CommandRegistry, which is fairly decoupled.
+        this.geyser = geyser;
+
+        // allow any extensions to customize permissions
+        geyser.getEventBus().fire((GeyserRegisterPermissionCheckersEvent) permissionCheckers::add);
+
+        // must still implement a basic permission system
+        try {
+            File permissionsFile = geyser.getBootstrap().getConfigFolder().resolve("permissions.yml").toFile();
+            FileUtils.fileOrCopiedFromResource(permissionsFile, "permissions.yml", geyser.getBootstrap());
+            PermissionConfiguration config = FileUtils.loadConfig(permissionsFile, PermissionConfiguration.class);
+            basePermissions.addAll(config.getDefaultPermissions());
+        } catch (Exception e) {
+            geyser.getLogger().error("Failed to load permissions.yml - proceeding without it", e);
+        }
+    }
+
+    /**
+     * Fire a {@link GeyserRegisterPermissionsEvent} to determine any additions or removals to the base list of
+     * permissions. This should be called after any event listeners have been registered, such as that of {@link CommandRegistry}.
+     */
+    public void fireRegisterPermissionsEvent() {
+        geyser.getEventBus().fire((GeyserRegisterPermissionsEvent) (permission, def) -> {
+            Objects.requireNonNull(permission, "permission");
+            Objects.requireNonNull(def, "permission default for " + permission);
+
+            if (permission.isBlank()) {
+                return;
+            }
+            if (def == TriState.TRUE) {
+                basePermissions.add(permission);
+            }
+        });
+    }
+
+    @Override
+    public boolean hasPermission(@NonNull GeyserCommandSource sender, @NonNull String permission) {
+        // Note: the two GeyserCommandSources on Geyser-Standalone are GeyserLogger and GeyserSession
+        // GeyserLogger#hasPermission always returns true
+        // GeyserSession#hasPermission delegates to this method,
+        // which is why this method doesn't just call GeyserCommandSource#hasPermission
+        if (sender.isConsole()) {
+            return true;
+        }
+
+        // An empty or blank permission is treated as a lack of permission requirement
+        if (permission.isBlank()) {
+            return true;
+        }
+
+        for (PermissionChecker checker : permissionCheckers) {
+            Boolean result = checker.hasPermission(sender, permission).toBoolean();
+            if (result != null) {
+                return result;
+            }
+            // undefined - try the next checker to see if it has a defined value
+        }
+        // fallback to our list of default permissions
+        // note that a PermissionChecker may in fact override any values set here by returning FALSE
+        return basePermissions.contains(permission);
+    }
+}

core/src/main/java/org/geysermc/geyser/dump/DumpInfo.java

@@ -81,7 +81,7 @@ public class DumpInfo {
     private final FlagsInfo flagsInfo;
     private final List<ExtensionInfo> extensionInfo;
 
-    public DumpInfo(boolean addLog) {
+    public DumpInfo(GeyserImpl geyser, boolean addLog) {
         this.versionInfo = new VersionInfo();
 
         this.cpuCount = Runtime.getRuntime().availableProcessors();
@@ -91,7 +91,7 @@ public class DumpInfo {
 
         this.gitInfo = new GitInfo(GeyserImpl.BUILD_NUMBER, GeyserImpl.COMMIT.substring(0, 7), GeyserImpl.COMMIT, GeyserImpl.BRANCH, GeyserImpl.REPOSITORY);
 
-        this.config = GeyserImpl.getInstance().getConfig();
+        this.config = geyser.getConfig();
         this.floodgate = new Floodgate();
 
         String md5Hash = "unknown";
@@ -107,7 +107,7 @@ public class DumpInfo {
             //noinspection UnstableApiUsage
             sha256Hash = byteSource.hash(Hashing.sha256()).toString();
         } catch (Exception e) {
-            if (GeyserImpl.getInstance().getConfig().isDebugMode()) {
+            if (this.config.isDebugMode()) {
                 e.printStackTrace();
             }
         }
@@ -116,18 +116,22 @@ public class DumpInfo {
         this.ramInfo = new RamInfo();
 
         if (addLog) {
-            this.logsInfo = new LogsInfo();
+            this.logsInfo = new LogsInfo(geyser);
         }
 
         this.userPlatforms = new Object2IntOpenHashMap<>();
-        for (GeyserSession session : GeyserImpl.getInstance().getSessionManager().getAllSessions()) {
+        for (GeyserSession session : geyser.getSessionManager().getAllSessions()) {
             DeviceOs device = session.getClientData().getDeviceOs();
             userPlatforms.put(device, userPlatforms.getOrDefault(device, 0) + 1);
         }
 
-        this.connectionAttempts = GeyserImpl.getInstance().getGeyserServer().getConnectionAttempts();
+        if (geyser.getGeyserServer() != null) {
+            this.connectionAttempts = geyser.getGeyserServer().getConnectionAttempts();
+        } else {
+            this.connectionAttempts = 0; // Fallback if Geyser failed to fully startup
+        }
 
-        this.bootstrapInfo = GeyserImpl.getInstance().getBootstrap().getDumpInfo();
+        this.bootstrapInfo = geyser.getBootstrap().getDumpInfo();
 
         this.flagsInfo = new FlagsInfo();
 
@@ -244,10 +248,10 @@ public class DumpInfo {
     public static class LogsInfo {
         private String link;
 
-        public LogsInfo() {
+        public LogsInfo(GeyserImpl geyser) {
             try {
                 Map<String, String> fields = new HashMap<>();
-                fields.put("content", FileUtils.readAllLines(GeyserImpl.getInstance().getBootstrap().getLogsPath()).collect(Collectors.joining("\n")));
+                fields.put("content", FileUtils.readAllLines(geyser.getBootstrap().getLogsPath()).collect(Collectors.joining("\n")));
 
                 JsonNode logData = GeyserImpl.JSON_MAPPER.readTree(WebUtils.postForm("https://api.mclo.gs/1/log", fields));
 

core/src/main/java/org/geysermc/geyser/entity/GeyserEntityData.java

@@ -96,4 +96,9 @@ public class GeyserEntityData implements EntityData {
     public boolean isMovementLocked() {
         return !movementLockOwners.isEmpty();
     }
+
+    @Override
+    public void switchHands() {
+        session.requestOffhandSwap();
+    }
 }

core/src/main/java/org/geysermc/geyser/entity/type/player/SessionPlayerEntity.java

@@ -321,7 +321,7 @@ public class SessionPlayerEntity extends PlayerEntity {
 
     public int voidFloorPosition() {
         // The void floor is offset about 40 blocks below the bottom of the world
-        BedrockDimension bedrockDimension = session.getChunkCache().getBedrockDimension();
+        BedrockDimension bedrockDimension = session.getBedrockDimension();
         return bedrockDimension.minY() - 40;
     }
 

core/src/main/java/org/geysermc/geyser/event/type/GeyserDefineCommandsEventImpl.java

@@ -35,12 +35,12 @@ import java.util.Map;
 public abstract class GeyserDefineCommandsEventImpl implements GeyserDefineCommandsEvent {
     private final Map<String, Command> commands;
 
-    public GeyserDefineCommandsEventImpl(Map<String, Command> commands) {
+    public GeyserDefineCommandsEventImpl(Map<String, ? extends Command> commands) {
-        this.commands = commands;
+        this.commands = Collections.unmodifiableMap(commands);
     }
 
     @Override
     public @NonNull Map<String, Command> commands() {
-        return Collections.unmodifiableMap(this.commands);
+        return this.commands;
     }
 }

core/src/main/java/org/geysermc/geyser/extension/GeyserExtensionDescription.java

@@ -43,9 +43,9 @@ import java.util.regex.Pattern;
 public record GeyserExtensionDescription(@NonNull String id,
                                          @NonNull String name,
                                          @NonNull String main,
+                                         int humanApiVersion,
                                          int majorApiVersion,
                                          int minorApiVersion,
-                                         int patchApiVersion,
                                          @NonNull String version,
                                          @NonNull List<String> authors) implements ExtensionDescription {
 
@@ -82,9 +82,9 @@ public record GeyserExtensionDescription(@NonNull String id,
             throw new InvalidDescriptionException(GeyserLocale.getLocaleStringLog("geyser.extensions.load.failed_api_format", name, apiVersion));
         }
         String[] api = apiVersion.split("\\.");
-        int majorApi = Integer.parseUnsignedInt(api[0]);
+        int humanApi = Integer.parseUnsignedInt(api[0]);
-        int minorApi = Integer.parseUnsignedInt(api[1]);
+        int majorApi = Integer.parseUnsignedInt(api[1]);
-        int patchApi = Integer.parseUnsignedInt(api[2]);
+        int minorApi = Integer.parseUnsignedInt(api[2]);
 
         List<String> authors = new ArrayList<>();
         if (source.author != null) {
@@ -94,7 +94,7 @@ public record GeyserExtensionDescription(@NonNull String id,
             authors.addAll(source.authors);
         }
 
-        return new GeyserExtensionDescription(id, name, main, majorApi, minorApi, patchApi, version, authors);
+        return new GeyserExtensionDescription(id, name, main, humanApi, majorApi, minorApi, version, authors);
     }
 
     @NonNull

core/src/main/java/org/geysermc/geyser/extension/GeyserExtensionLoader.java

@@ -29,10 +29,15 @@ import it.unimi.dsi.fastutil.objects.Object2ObjectMap;
 import it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap;
 import lombok.RequiredArgsConstructor;
 import org.checkerframework.checker.nullness.qual.NonNull;
-import org.geysermc.api.Geyser;
+import org.geysermc.api.util.ApiVersion;
 import org.geysermc.geyser.GeyserImpl;
+import org.geysermc.geyser.api.GeyserApi;
 import org.geysermc.geyser.api.event.ExtensionEventBus;
-import org.geysermc.geyser.api.extension.*;
+import org.geysermc.geyser.api.extension.Extension;
+import org.geysermc.geyser.api.extension.ExtensionDescription;
+import org.geysermc.geyser.api.extension.ExtensionLoader;
+import org.geysermc.geyser.api.extension.ExtensionLogger;
+import org.geysermc.geyser.api.extension.ExtensionManager;
 import org.geysermc.geyser.api.extension.exception.InvalidDescriptionException;
 import org.geysermc.geyser.api.extension.exception.InvalidExtensionException;
 import org.geysermc.geyser.extension.event.GeyserExtensionEventBus;
@@ -40,7 +45,12 @@ import org.geysermc.geyser.text.GeyserLocale;
 
 import java.io.IOException;
 import java.io.Reader;
-import java.nio.file.*;
+import java.nio.file.FileSystem;
+import java.nio.file.FileSystems;
+import java.nio.file.Files;
+import java.nio.file.NoSuchFileException;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
 import java.util.HashMap;
 import java.util.LinkedHashMap;
 import java.util.List;
@@ -176,16 +186,22 @@ public class GeyserExtensionLoader extends ExtensionLoader {
                         return;
                     }
 
-                    // Completely different API version
+                    // Check whether an extensions' requested api version is compatible
-                    if (description.majorApiVersion() != Geyser.api().majorApiVersion()) {
+                    ApiVersion.Compatibility compatibility = GeyserApi.api().geyserApiVersion().supportsRequestedVersion(
+                        description.humanApiVersion(),
+                        description.majorApiVersion(),
+                        description.minorApiVersion()
+                    );
+
+                    if (compatibility != ApiVersion.Compatibility.COMPATIBLE) {
+                        // Workaround for the switch to the Geyser API version instead of the Base API version in extensions
+                        if (compatibility == ApiVersion.Compatibility.HUMAN_DIFFER && description.humanApiVersion() == 1) {
+                            GeyserImpl.getInstance().getLogger().warning("The extension %s requested the Base API version %s, which is deprecated in favor of specifying the Geyser API version. Please update the extension, or contact its developer."
+                                .formatted(name, description.apiVersion()));
+                        } else {
                             GeyserImpl.getInstance().getLogger().error(GeyserLocale.getLocaleStringLog("geyser.extensions.load.failed_api_version", name, description.apiVersion()));
                             return;
                         }
-
-                    // If the extension requires new API features, being backwards compatible
-                    if (description.minorApiVersion() > Geyser.api().minorApiVersion()) {
-                        GeyserImpl.getInstance().getLogger().error(GeyserLocale.getLocaleStringLog("geyser.extensions.load.failed_api_version", name, description.apiVersion()));
-                        return;
                     }
 
                     GeyserExtensionContainer container = this.loadExtension(path, description);

core/src/main/java/org/geysermc/geyser/extension/command/GeyserExtensionCommand.java

@@ -25,19 +25,208 @@
 
 package org.geysermc.geyser.extension.command;
 
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.checker.nullness.qual.Nullable;
+import org.geysermc.geyser.api.command.Command;
+import org.geysermc.geyser.api.command.CommandExecutor;
+import org.geysermc.geyser.api.command.CommandSource;
+import org.geysermc.geyser.api.connection.GeyserConnection;
 import org.geysermc.geyser.api.extension.Extension;
+import org.geysermc.geyser.api.util.TriState;
 import org.geysermc.geyser.command.GeyserCommand;
+import org.geysermc.geyser.command.GeyserCommandSource;
+import org.geysermc.geyser.session.GeyserSession;
+import org.incendo.cloud.CommandManager;
+import org.incendo.cloud.context.CommandContext;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+
+import static org.incendo.cloud.parser.standard.StringParser.greedyStringParser;
 
 public abstract class GeyserExtensionCommand extends GeyserCommand {
+
     private final Extension extension;
+    private final String rootCommand;
 
-    public GeyserExtensionCommand(Extension extension, String name, String description, String permission) {
+    public GeyserExtensionCommand(@NonNull Extension extension, @NonNull String name, @NonNull String description,
-        super(name, description, permission);
+                                  @NonNull String permission, @Nullable TriState permissionDefault,
+                                  boolean playerOnly, boolean bedrockOnly) {
 
+        super(name, description, permission, permissionDefault, playerOnly, bedrockOnly);
         this.extension = extension;
+        this.rootCommand = Objects.requireNonNull(extension.rootCommand());
+
+        if (this.rootCommand.isBlank()) {
+            throw new IllegalStateException("rootCommand of extension " + extension.name() + " may not be blank");
+        }
     }
 
-    public Extension extension() {
+    public final Extension extension() {
         return this.extension;
     }
+
+    @Override
+    public final String rootCommand() {
+        return this.rootCommand;
+    }
+
+    public static class Builder<T extends CommandSource> implements Command.Builder<T> {
+        @NonNull private final Extension extension;
+        @Nullable private Class<? extends T> sourceType;
+        @Nullable private String name;
+        @NonNull private String description = "";
+        @NonNull private String permission = "";
+        @Nullable private TriState permissionDefault;
+        @Nullable private List<String> aliases;
+        private boolean suggestedOpOnly = false; // deprecated for removal
+        private boolean playerOnly = false;
+        private boolean bedrockOnly = false;
+        @Nullable private CommandExecutor<T> executor;
+
+        public Builder(@NonNull Extension extension) {
+            this.extension = Objects.requireNonNull(extension);
+        }
+
+        @Override
+        public Command.Builder<T> source(@NonNull Class<? extends T> sourceType) {
+            this.sourceType = Objects.requireNonNull(sourceType, "command source type");
+            return this;
+        }
+
+        @Override
+        public Builder<T> name(@NonNull String name) {
+            this.name = Objects.requireNonNull(name, "command name");
+            return this;
+        }
+
+        @Override
+        public Builder<T> description(@NonNull String description) {
+            this.description = Objects.requireNonNull(description, "command description");
+            return this;
+        }
+
+        @Override
+        public Builder<T> permission(@NonNull String permission) {
+            this.permission = Objects.requireNonNull(permission, "command permission");
+            return this;
+        }
+
+        @Override
+        public Builder<T> permission(@NonNull String permission, @NonNull TriState defaultValue) {
+            this.permission = Objects.requireNonNull(permission, "command permission");
+            this.permissionDefault = Objects.requireNonNull(defaultValue, "command permission defaultValue");
+            return this;
+        }
+
+        @Override
+        public Builder<T> aliases(@NonNull List<String> aliases) {
+            this.aliases = Objects.requireNonNull(aliases, "command aliases");
+            return this;
+        }
+
+        @SuppressWarnings("removal") // this is our doing
+        @Override
+        public Builder<T> suggestedOpOnly(boolean suggestedOpOnly) {
+            this.suggestedOpOnly = suggestedOpOnly;
+            if (suggestedOpOnly) {
+                // the most amount of legacy/deprecated behaviour I'm willing to support
+                this.permissionDefault = TriState.NOT_SET;
+            }
+            return this;
+        }
+
+        @SuppressWarnings("removal") // this is our doing
+        @Override
+        public Builder<T> executableOnConsole(boolean executableOnConsole) {
+            this.playerOnly = !executableOnConsole;
+            return this;
+        }
+
+        @Override
+        public Command.Builder<T> playerOnly(boolean playerOnly) {
+            this.playerOnly = playerOnly;
+            return this;
+        }
+
+        @Override
+        public Builder<T> bedrockOnly(boolean bedrockOnly) {
+            this.bedrockOnly = bedrockOnly;
+            return this;
+        }
+
+        @Override
+        public Builder<T> executor(@NonNull CommandExecutor<T> executor) {
+            this.executor = Objects.requireNonNull(executor, "command executor");
+            return this;
+        }
+
+        @NonNull
+        @Override
+        public GeyserExtensionCommand build() {
+            // These are captured in the anonymous lambda below and shouldn't change even if the builder does
+            final Class<? extends T> sourceType = this.sourceType;
+            final boolean suggestedOpOnly = this.suggestedOpOnly;
+            final CommandExecutor<T> executor = this.executor;
+
+            if (name == null) {
+                throw new IllegalArgumentException("name was not provided for a command in extension " + extension.name());
+            }
+            if (sourceType == null) {
+                throw new IllegalArgumentException("Source type was not defined for command " + name + " in extension " + extension.name());
+            }
+            if (executor == null) {
+                throw new IllegalArgumentException("Command executor was not defined for command " + name + " in extension " + extension.name());
+            }
+
+            // if the source type is a GeyserConnection then it is inherently bedrockOnly
+            final boolean bedrockOnly = this.bedrockOnly || GeyserConnection.class.isAssignableFrom(sourceType);
+            // a similar check would exist for executableOnConsole, but there is not a logger type exposed in the api
+
+            GeyserExtensionCommand command = new GeyserExtensionCommand(extension, name, description, permission, permissionDefault, playerOnly, bedrockOnly) {
+
+                @Override
+                public void register(CommandManager<GeyserCommandSource> manager) {
+                    manager.command(baseBuilder(manager)
+                        .optional("args", greedyStringParser())
+                        .handler(this::execute));
+                }
+
+                @SuppressWarnings("unchecked")
+                @Override
+                public void execute(CommandContext<GeyserCommandSource> context) {
+                    GeyserCommandSource source = context.sender();
+                    String[] args = context.getOrDefault("args", "").split(" ");
+
+                    if (sourceType.isInstance(source)) {
+                        executor.execute((T) source, this, args);
+                        return;
+                    }
+
+                    @Nullable GeyserSession session = source.connection();
+                    if (sourceType.isInstance(session)) {
+                        executor.execute((T) session, this, args);
+                        return;
+                    }
+
+                    // currently, the only subclass of CommandSource exposed in the api is GeyserConnection.
+                    // when this command was registered, we enabled bedrockOnly if the sourceType was a GeyserConnection.
+                    // as a result, the permission checker should handle that case and this method shouldn't even be reached.
+                    source.sendMessage("You must be a " + sourceType.getSimpleName() + " to run this command.");
+                }
+
+                @SuppressWarnings("removal") // this is our doing
+                @Override
+                public boolean isSuggestedOpOnly() {
+                    return suggestedOpOnly;
+                }
+            };
+
+            if (aliases != null) {
+                command.aliases = new ArrayList<>(aliases);
+            }
+            return command;
+        }
+    }
 }

core/src/main/java/org/geysermc/geyser/level/GeyserAdvancement.java

@@ -82,11 +82,15 @@ public class GeyserAdvancement {
                 this.rootId = this.advancement.getId();
             } else {
                 // Go through our cache, and descend until we find the root ID
-                GeyserAdvancement advancement = advancementsCache.getStoredAdvancements().get(this.advancement.getParentId());
+                GeyserAdvancement parent = advancementsCache.getStoredAdvancements().get(this.advancement.getParentId());
-                if (advancement.getParentId() == null) {
+                if (parent == null) {
-                    this.rootId = advancement.getId();
+                    // Parent doesn't exist, is invalid, or couldn't be found for another reason
+                    // So assuming there is no parent and this is the root
+                    this.rootId = this.advancement.getId();
+                } else if (parent.getParentId() == null) {
+                    this.rootId = parent.getId();
                 } else {
-                    this.rootId = advancement.getRootId(advancementsCache);
+                    this.rootId = parent.getRootId(advancementsCache);
                 }
             }
         }

core/src/main/java/org/geysermc/geyser/level/GeyserWorldManager.java

@@ -118,11 +118,6 @@ public class GeyserWorldManager extends WorldManager {
         return GameMode.SURVIVAL;
     }
 
-    @Override
-    public boolean hasPermission(GeyserSession session, String permission) {
-        return false;
-    }
-
     @NonNull
     @Override
     public CompletableFuture<@Nullable DataComponents> getPickItemComponents(GeyserSession session, int x, int y, int z, boolean addNbtData) {