Re-Added PluginDependent to HandledCommand

# Conflicts:
#	eco-api/src/main/java/com/willfp/eco/internal/arrows/ArrowDataListener.java
#	eco-api/src/main/java/com/willfp/eco/internal/items/AbstractItemStackBuilder.java
#	eco-api/src/main/java/com/willfp/eco/util/TeamUtils.java

.gitignore

@@ -14,7 +14,7 @@ bin/
 # Gradle
 .gradle
 **/build/
-!src/**/build/
+!eco-api/src/**/build/
 .gradletasknamecache
 !gradle-wrapper.jar
 gradle-app.setting

build.gradle

@@ -1,102 +1,102 @@
 plugins {
     id 'java-library'
-    id 'com.github.johnrengelman.shadow' version '5.2.0'
+    id 'com.github.johnrengelman.shadow' version '7.0.0'
     id 'maven-publish'
     id 'java'
 }
 
 dependencies {
-    implementation 'org.apache.maven:maven-artifact:3.0.3'
-    implementation 'org.bstats:bstats-bukkit:1.7'
-    compileOnly 'org.spigotmc:spigot-api:1.16.4-R0.1-SNAPSHOT'
-    compileOnly 'me.clip:placeholderapi:2.10.9'
-    compileOnly 'com.comphenix.protocol:ProtocolLib:4.6.0-SNAPSHOT'
-    compileOnly 'com.sk89q.worldguard:worldguard-bukkit:7.0.4-SNAPSHOT'
-    compileOnly 'com.github.TechFortress:GriefPrevention:16.14.0'
-    compileOnly 'com.massivecraft:Factions:1.6.9.5-U0.5.10'
-    compileOnly 'com.github.cryptomorin:kingdoms:1.10.3.1'
-    compileOnly 'com.github.TownyAdvanced:Towny:0.96.2.0'
-    compileOnly 'com.github.angeschossen:LandsAPI:4.7.3'
-    compileOnly 'fr.neatmonster:nocheatplus:3.16.1-SNAPSHOT'
-    compileOnly 'com.github.jiangdashao:matrix-api-repo:317d4635fd'
-    compileOnly 'org.jetbrains:annotations:19.0.0'
-    compileOnly fileTree(dir: '/lib', include: ['*.jar'])
-
-    // Lombok
-    compileOnly 'org.projectlombok:lombok:1.18.16'
-    annotationProcessor 'org.projectlombok:lombok:1.18.16'
-    testCompileOnly 'org.projectlombok:lombok:1.18.16'
-    testAnnotationProcessor 'org.projectlombok:lombok:1.18.16'
+    implementation project(":eco-api")
+    implementation project(":eco-core").getSubprojects()
 }
 
+allprojects {
+    apply plugin: 'java'
+    apply plugin: 'java-library'
+    apply plugin: 'maven-publish'
+    apply plugin: 'com.github.johnrengelman.shadow'
 
-repositories {
-    mavenCentral()
-    jcenter()
-    mavenLocal()
-    maven { url 'https://jitpack.io' }
+    repositories {
+        mavenCentral()
+        mavenLocal()
+        maven { url 'https://jitpack.io' }
 
-    // NMS (for jitpack compilation)
-    maven { url 'https://repo.codemc.org/repository/nms/' }
+        // NMS (for jitpack compilation)
+        maven { url 'https://repo.codemc.org/repository/nms/' }
 
-    // bStats
-    maven { url 'https://repo.codemc.org/repository/maven-public' }
+        // bStats, mcMMO
+        maven { url 'https://repo.codemc.org/repository/maven-public' }
 
-    // Spigot API
-    maven { url 'https://hub.spigotmc.org/nexus/content/repositories/snapshots/' }
+        // Spigot API
+        maven { url 'https://hub.spigotmc.org/nexus/content/repositories/snapshots/' }
 
-    // PlaceholderAPI
-    maven { url 'https://repo.extendedclip.com/content/repositories/placeholderapi/' }
+        // PlaceholderAPI
+        maven { url 'https://repo.extendedclip.com/content/repositories/placeholderapi/' }
 
-    // ProtocolLib
-    maven { url 'https://repo.dmulloy2.net/nexus/repository/public/' }
+        // ProtocolLib
+        maven { url 'https://repo.dmulloy2.net/nexus/repository/public/' }
 
-    // WorldGuard
-    maven { url 'https://maven.enginehub.org/repo/' }
+        // WorldGuard
+        maven { url 'https://maven.enginehub.org/repo/' }
 
-    // FactionsUUID
-    maven { url 'https://ci.ender.zone/plugin/repository/everything/' }
+        // FactionsUUID
+        maven { url 'https://ci.ender.zone/plugin/repository/everything/' }
 
-    // NoCheatPlus
-    maven { url 'https://repo.md-5.net/content/repositories/snapshots/' }
-}
+        // NoCheatPlus
+        maven { url 'https://repo.md-5.net/content/repositories/snapshots/' }
 
-tasks.withType(JavaCompile) {
-    options.deprecation = true
-    options.encoding = 'UTF-8'
-}
-
-configurations.all {
-    exclude group: "org.codehaus.plexus", module: "plexus-utils"
-    exclude group: "com.mojang", module: "brigadier"
-    exclude group: "org.kitteh", module: "paste-gg-api"
-    exclude group: "org.spongepowered", module: "configurate-hocon"
-    exclude group: "com.darkblade12", module: "particleeffect"
-}
-
-shadowJar {
-    relocate('org.bstats.bukkit', 'com.willfp.eco.util.shaded.bstats')
-    relocate('org.apache.maven', 'com.willfp.eco.util.shaded.maven')
-}
-
-publishing {
-    publications {
-        shadow(MavenPublication) {
-            from components.java
-            artifact shadowJar
-        }
+        // CombatLogX
+        maven { url 'https://nexus.sirblobman.xyz/repository/public/' }
     }
+
+    dependencies {
+        compileOnly 'org.jetbrains:annotations:19.0.0'
+
+        // Lombok
+        compileOnly 'org.projectlombok:lombok:1.18.20'
+        annotationProcessor 'org.projectlombok:lombok:1.18.20'
+        testCompileOnly 'org.projectlombok:lombok:1.18.20'
+        testAnnotationProcessor 'org.projectlombok:lombok:1.18.20'
+    }
+
+    tasks.withType(JavaCompile) {
+        options.deprecation = true
+        options.encoding = 'UTF-8'
+    }
+
+    configurations.all {
+        exclude group: "org.codehaus.plexus", module: "plexus-utils"
+        exclude group: "com.mojang", module: "brigadier"
+        exclude group: "org.kitteh", module: "paste-gg-api"
+        exclude group: "org.spongepowered", module: "configurate-hocon"
+        exclude group: "com.darkblade12", module: "particleeffect"
+        exclude group: "com.github.cryptomorin", module: "XSeries"
+    }
+
+    shadowJar {
+        relocate('org.bstats.bukkit', 'com.willfp.eco.shaded.bstats')
+        relocate('org.apache.maven', 'com.willfp.eco.shaded.maven')
+    }
+
+    jar {
+        onlyIf { !sourceSets.main.allSource.files.isEmpty() }
+    }
+
+    compileJava {
+        onlyIf { !sourceSets.main.allSource.files.isEmpty() }
+    }
+
+    java {
+        sourceCompatibility = JavaVersion.VERSION_16
+        targetCompatibility = JavaVersion.VERSION_16
+    }
+
+    compileJava.options.encoding = 'UTF-8'
+    compileJava.dependsOn clean
+
+    build.dependsOn shadowJar
 }
 
-compileJava.options.encoding = 'UTF-8'
-compileJava.dependsOn clean
-
-publishToMavenLocal.dependsOn shadowJar
-
-build.dependsOn shadowJar
-build.dependsOn publishToMavenLocal
-
 group = 'com.willfp'
 archivesBaseName = project.name
-version = '1.0.1'
-java.sourceCompatibility = JavaVersion.VERSION_1_8
+version = findProperty("version")

config/checkstyle/checkstyle.xml

@@ -115,7 +115,6 @@
         <!-- Checks for imports                              -->
         <!-- See https://checkstyle.org/config_imports.html -->
         <module name="AvoidStarImport"/>
-        <module name="IllegalImport"/> <!-- defaults to sun.* packages -->
         <module name="RedundantImport"/>
         <module name="UnusedImports">
             <property name="processJavadoc" value="true"/>

config/checkstyle/suppression.xml

@@ -5,6 +5,12 @@
         "http://www.puppycrawl.com/dtds/suppressions_1_1.dtd">
 
 <suppressions>
+    <!-- Internals don't need javadoc. -->
+    <suppress files="[\\/]internal[\\/]" checks="MissingJavadocMethod"/>
+    <suppress files="[\\/]internal[\\/]" checks="JavadocVariable"/>
+    <suppress files="[\\/]eco[\\/]spigot[\\/]" checks="MissingJavadocMethod"/>
+    <suppress files="[\\/]eco[\\/]spigot[\\/]" checks="JavadocVariable"/>
+
     <!-- Modified version of library -->
     <suppress files="ArmorEquipEvent.java" checks="JavadocVariable"/>
     <suppress files="ArmorEquipEvent.java" checks="MissingJavadocMethod"/>

eco-api/build.gradle

@@ -0,0 +1,29 @@
+plugins {
+    id 'com.github.johnrengelman.shadow'
+}
+
+group 'com.willfp'
+version rootProject.version
+
+dependencies {
+    compileOnly 'org.spigotmc:spigot:1.17-R0.1-SNAPSHOT'
+    compileOnly 'org.apache.maven:maven-artifact:3.0.3'
+    compileOnly 'org.bstats:bstats-bukkit:1.7'
+    compileOnly 'com.comphenix.protocol:ProtocolLib:4.6.0-SNAPSHOT'
+    compileOnly 'me.clip:placeholderapi:2.10.9'
+    compileOnly 'com.google.code.gson:gson:2.8.7'
+}
+
+compileJava.options.encoding = 'UTF-8'
+compileJava.dependsOn clean
+
+build.dependsOn publishToMavenLocal
+
+publishing {
+    publications {
+        shadow(MavenPublication) {
+            from components.java
+            artifactId 'eco'
+        }
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/AbstractPacketAdapter.java

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.protocollib;
+package com.willfp.eco.core;
 
 import com.comphenix.protocol.PacketType;
 import com.comphenix.protocol.ProtocolLibrary;
@@ -6,8 +6,8 @@ import com.comphenix.protocol.events.ListenerPriority;
 import com.comphenix.protocol.events.PacketAdapter;
 import com.comphenix.protocol.events.PacketContainer;
 import com.comphenix.protocol.events.PacketEvent;
-import com.willfp.eco.util.plugin.AbstractEcoPlugin;
 import lombok.Getter;
+import org.bukkit.entity.Player;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.Collections;
@@ -34,7 +34,7 @@ public abstract class AbstractPacketAdapter extends PacketAdapter {
      * @param priority The priority at which the adapter should be ran on packet send/receive.
      * @param postLoad If the packet adapter should be registered after the server has loaded.
      */
-    protected AbstractPacketAdapter(@NotNull final AbstractEcoPlugin plugin,
+    protected AbstractPacketAdapter(@NotNull final EcoPlugin plugin,
                                     @NotNull final PacketType type,
                                     @NotNull final ListenerPriority priority,
                                     final boolean postLoad) {
@@ -50,7 +50,7 @@ public abstract class AbstractPacketAdapter extends PacketAdapter {
      * @param type     The {@link PacketType} to listen for.
      * @param postLoad If the packet adapter should be registered after the server has loaded.
      */
-    protected AbstractPacketAdapter(@NotNull final AbstractEcoPlugin plugin,
+    protected AbstractPacketAdapter(@NotNull final EcoPlugin plugin,
                                     @NotNull final PacketType type,
                                     final boolean postLoad) {
         this(plugin, type, ListenerPriority.NORMAL, postLoad);
@@ -60,8 +60,10 @@ public abstract class AbstractPacketAdapter extends PacketAdapter {
      * The code that should be executed once the packet has been received.
      *
      * @param packet The packet.
+     * @param player The player.
      */
-    public void onReceive(@NotNull final PacketContainer packet) {
+    public void onReceive(@NotNull final PacketContainer packet,
+                          @NotNull final Player player) {
         // Empty rather than abstract as implementations don't need both
     }
 
@@ -69,8 +71,36 @@ public abstract class AbstractPacketAdapter extends PacketAdapter {
      * THe code that should be executed once the packet has been sent.
      *
      * @param packet The packet.
+     * @param player The player.
      */
-    public void onSend(@NotNull final PacketContainer packet) {
+    public void onSend(@NotNull final PacketContainer packet,
+                       @NotNull final Player player) {
+        // Empty rather than abstract as implementations don't need both
+    }
+
+    /**
+     * The code that should be executed once the packet has been received.
+     *
+     * @param packet The packet.
+     * @param player The player.
+     * @param event  The event.
+     */
+    public void onReceive(@NotNull final PacketContainer packet,
+                          @NotNull final Player player,
+                          @NotNull final PacketEvent event) {
+        // Empty rather than abstract as implementations don't need both
+    }
+
+    /**
+     * THe code that should be executed once the packet has been sent.
+     *
+     * @param packet The packet.
+     * @param player The player.
+     * @param event  The event.
+     */
+    public void onSend(@NotNull final PacketContainer packet,
+                       @NotNull final Player player,
+                       @NotNull final PacketEvent event) {
         // Empty rather than abstract as implementations don't need both
     }
 
@@ -89,7 +119,8 @@ public abstract class AbstractPacketAdapter extends PacketAdapter {
             return;
         }
 
-        onReceive(event.getPacket());
+        onReceive(event.getPacket(), event.getPlayer());
+        onReceive(event.getPacket(), event.getPlayer(), event);
     }
 
     /**
@@ -107,7 +138,13 @@ public abstract class AbstractPacketAdapter extends PacketAdapter {
             return;
         }
 
-        onSend(event.getPacket());
+        onSend(event.getPacket(), event.getPlayer());
+        onSend(event.getPacket(), event.getPlayer(), event);
+    }
+
+    @Override
+    public final EcoPlugin getPlugin() {
+        return (EcoPlugin) super.getPlugin();
     }
 
     /**

eco-api/src/main/java/com/willfp/eco/core/EcoPlugin.java

@@ -0,0 +1,690 @@
+package com.willfp.eco.core;
+
+import com.willfp.eco.core.command.AbstractCommand;
+import com.willfp.eco.core.command.impl.PluginCommand;
+import com.willfp.eco.core.config.ConfigHandler;
+import com.willfp.eco.core.config.base.ConfigYml;
+import com.willfp.eco.core.config.base.LangYml;
+import com.willfp.eco.core.display.Display;
+import com.willfp.eco.core.display.DisplayModule;
+import com.willfp.eco.core.events.EventManager;
+import com.willfp.eco.core.extensions.ExtensionLoader;
+import com.willfp.eco.core.factory.MetadataValueFactory;
+import com.willfp.eco.core.factory.NamespacedKeyFactory;
+import com.willfp.eco.core.factory.RunnableFactory;
+import com.willfp.eco.core.integrations.IntegrationLoader;
+import com.willfp.eco.core.integrations.placeholder.PlaceholderManager;
+import com.willfp.eco.core.scheduling.Scheduler;
+import com.willfp.eco.internal.Internals;
+import com.willfp.eco.internal.UpdateChecker;
+import com.willfp.eco.internal.arrows.ArrowDataListener;
+import com.willfp.eco.internal.config.updating.EcoConfigHandler;
+import com.willfp.eco.internal.events.EcoEventManager;
+import com.willfp.eco.internal.extensions.EcoExtensionLoader;
+import com.willfp.eco.internal.factory.EcoMetadataValueFactory;
+import com.willfp.eco.internal.factory.EcoNamespacedKeyFactory;
+import com.willfp.eco.internal.factory.EcoRunnableFactory;
+import com.willfp.eco.internal.integrations.PlaceholderIntegrationPAPI;
+import com.willfp.eco.internal.logging.EcoLogger;
+import com.willfp.eco.internal.scheduling.EcoScheduler;
+import lombok.Getter;
+import org.apache.commons.lang.Validate;
+import org.apache.maven.artifact.versioning.DefaultArtifactVersion;
+import org.bstats.bukkit.Metrics;
+import org.bukkit.Bukkit;
+import org.bukkit.configuration.file.FileConfiguration;
+import org.bukkit.event.Listener;
+import org.bukkit.plugin.Plugin;
+import org.bukkit.plugin.java.JavaPlugin;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+import java.util.logging.Logger;
+import java.util.stream.Collectors;
+
+@SuppressWarnings({"deprecation", "DeprecatedIsStillUsed"})
+public abstract class EcoPlugin extends JavaPlugin {
+    /**
+     * Loaded eco plugins.
+     */
+    public static final List<String> LOADED_ECO_PLUGINS = new ArrayList<>();
+
+    /**
+     * The name of the plugin.
+     *
+     * @deprecated Pointless, use getName instead.
+     */
+    @Getter
+    @Deprecated
+    private final String pluginName;
+
+    /**
+     * The spigot resource ID of the plugin.
+     */
+    @Getter
+    private final int resourceId;
+
+    /**
+     * The bStats resource ID of the plugin.
+     */
+    @Getter
+    private final int bStatsId;
+
+    /**
+     * The package where proxy implementations are.
+     */
+    @Getter
+    private final String proxyPackage;
+
+    /**
+     * The color of the plugin, used in messages.
+     */
+    @Getter
+    private final String color;
+
+    /**
+     * Loaded integrations.
+     */
+    @Getter
+    private final Set<String> loadedIntegrations = new HashSet<>();
+
+    /**
+     * Set of classes to be processed on config update.
+     */
+    private final List<Class<?>> updatableClasses = new ArrayList<>();
+
+    /**
+     * The internal plugin scheduler.
+     */
+    @Getter
+    private final Scheduler scheduler;
+
+    /**
+     * The internal plugin Event Manager.
+     */
+    @Getter
+    private final EventManager eventManager;
+
+    /**
+     * Config.yml.
+     */
+    @Getter
+    private final ConfigYml configYml;
+
+    /**
+     * Lang.yml.
+     */
+    @Getter
+    private final LangYml langYml;
+
+    /**
+     * The internal factory to produce {@link org.bukkit.NamespacedKey}s.
+     */
+    @Getter
+    private final NamespacedKeyFactory namespacedKeyFactory;
+
+    /**
+     * The internal factory to produce {@link org.bukkit.metadata.FixedMetadataValue}s.
+     */
+    @Getter
+    private final MetadataValueFactory metadataValueFactory;
+
+    /**
+     * The internal factory to produce {@link com.willfp.eco.core.scheduling.RunnableTask}s.
+     */
+    @Getter
+    private final RunnableFactory runnableFactory;
+
+    /**
+     * The loader for all plugin extensions.
+     *
+     * @see com.willfp.eco.core.extensions.Extension
+     */
+    @Getter
+    private final ExtensionLoader extensionLoader;
+
+    /**
+     * The handler class for updatable classes.
+     */
+    @Getter
+    private final ConfigHandler configHandler;
+
+    /**
+     * The display module for the plugin.
+     */
+    @Getter
+    private DisplayModule displayModule;
+
+    /**
+     * The logger for the plugin.
+     */
+    private final Logger logger;
+
+    /**
+     * If the server is running an outdated version of the plugin.
+     */
+    @Getter
+    private boolean outdated = false;
+
+    /**
+     * If the plugin supports extensions.
+     */
+    @Getter
+    private final boolean supportingExtensions;
+
+    /**
+     * Create a new plugin without a specified color, proxy support, spigot, or bStats.
+     */
+    protected EcoPlugin() {
+        this("&f");
+    }
+
+    /**
+     * Create a new plugin without proxy support, spigot, or bStats.
+     *
+     * @param color The color.
+     */
+    protected EcoPlugin(@NotNull final String color) {
+        this("", color);
+    }
+
+
+    /**
+     * Create a new plugin unlinked to spigot and bStats.
+     *
+     * @param proxyPackage The package where proxy implementations are stored.
+     * @param color        The color of the plugin (used in messages, such as &a, &b)
+     */
+    protected EcoPlugin(@NotNull final String proxyPackage,
+                        @NotNull final String color) {
+        this(0, 0, proxyPackage, color);
+    }
+
+    /**
+     * Create a new plugin without proxy or extension support.
+     *
+     * @param resourceId The spigot resource ID for the plugin.
+     * @param bStatsId   The bStats resource ID for the plugin.
+     * @param color      The color of the plugin (used in messages, such as &a, &b)
+     */
+    protected EcoPlugin(final int resourceId,
+                        final int bStatsId,
+                        @NotNull final String color) {
+        this(resourceId, bStatsId, "", color);
+    }
+
+    /**
+     * Create a new plugin without proxy support.
+     *
+     * @param resourceId           The spigot resource ID for the plugin.
+     * @param bStatsId             The bStats resource ID for the plugin.
+     * @param color                The color of the plugin (used in messages, such as &a, &b)
+     * @param supportingExtensions If the plugin supports extensions.
+     */
+    protected EcoPlugin(final int resourceId,
+                        final int bStatsId,
+                        @NotNull final String color,
+                        final boolean supportingExtensions) {
+        this(resourceId, bStatsId, "", color, supportingExtensions);
+    }
+
+    /**
+     * Create a new plugin without extension support.
+     *
+     * @param resourceId   The spigot resource ID for the plugin.
+     * @param bStatsId     The bStats resource ID for the plugin.
+     * @param proxyPackage The package where proxy implementations are stored.
+     * @param color        The color of the plugin (used in messages, such as &a, &b)
+     */
+    protected EcoPlugin(final int resourceId,
+                        final int bStatsId,
+                        @NotNull final String proxyPackage,
+                        @NotNull final String color) {
+        this(resourceId, bStatsId, proxyPackage, color, false);
+    }
+
+    /**
+     * Create a new plugin.
+     *
+     * @param resourceId           The spigot resource ID for the plugin.
+     * @param bStatsId             The bStats resource ID for the plugin.
+     * @param proxyPackage         The package where proxy implementations are stored.
+     * @param color                The color of the plugin (used in messages, such as &a, &b)
+     * @param supportingExtensions If the plugin supports extensions.
+     */
+    protected EcoPlugin(final int resourceId,
+                        final int bStatsId,
+                        @NotNull final String proxyPackage,
+                        @NotNull final String color,
+                        final boolean supportingExtensions) {
+        this("", resourceId, bStatsId, proxyPackage, color, supportingExtensions);
+    }
+
+    /**
+     * Create a new plugin.
+     *
+     * @param pluginName   The name of the plugin.
+     * @param resourceId   The spigot resource ID for the plugin.
+     * @param bStatsId     The bStats resource ID for the plugin.
+     * @param proxyPackage The package where proxy implementations are stored.
+     * @param color        The color of the plugin (used in messages, such as &a, &b)
+     * @deprecated pluginName is redundant.
+     */
+    @Deprecated
+    @SuppressWarnings("unused")
+    protected EcoPlugin(@NotNull final String pluginName,
+                        final int resourceId,
+                        final int bStatsId,
+                        @NotNull final String proxyPackage,
+                        @NotNull final String color) {
+        this(pluginName, resourceId, bStatsId, proxyPackage, color, false);
+    }
+
+    /**
+     * Create a new plugin.
+     *
+     * @param pluginName           The name of the plugin.
+     * @param resourceId           The spigot resource ID for the plugin.
+     * @param bStatsId             The bStats resource ID for the plugin.
+     * @param proxyPackage         The package where proxy implementations are stored.
+     * @param color                The color of the plugin (used in messages, such as &a, &b)
+     * @param supportingExtensions If the plugin supports extensions.
+     * @deprecated pluginName is redundant.
+     */
+    @Deprecated
+    @SuppressWarnings("unused")
+    protected EcoPlugin(@NotNull final String pluginName,
+                        final int resourceId,
+                        final int bStatsId,
+                        @NotNull final String proxyPackage,
+                        @NotNull final String color,
+                        final boolean supportingExtensions) {
+        this.pluginName = this.getName();
+        this.resourceId = resourceId;
+        this.bStatsId = bStatsId;
+        this.proxyPackage = proxyPackage;
+        this.color = color;
+        this.supportingExtensions = supportingExtensions;
+
+        this.scheduler = new EcoScheduler(this);
+        this.eventManager = new EcoEventManager(this);
+        this.namespacedKeyFactory = new EcoNamespacedKeyFactory(this);
+        this.metadataValueFactory = new EcoMetadataValueFactory(this);
+        this.runnableFactory = new EcoRunnableFactory(this);
+        this.extensionLoader = new EcoExtensionLoader(this);
+        this.configHandler = new EcoConfigHandler(this);
+        this.logger = new EcoLogger(this);
+
+        this.langYml = new LangYml(this);
+        this.configYml = new ConfigYml(this);
+
+        LOADED_ECO_PLUGINS.add(this.getName().toLowerCase());
+    }
+
+    /**
+     * Default code to be executed on plugin enable.
+     */
+    @Override
+    public final void onEnable() {
+        super.onEnable();
+
+        this.getLogger().info("");
+        this.getLogger().info("Loading " + this.getColor() + this.getName());
+
+        this.getEventManager().registerListener(new ArrowDataListener(this));
+
+        if (this.getResourceId() != 0) {
+            new UpdateChecker(this).getVersion(version -> {
+                DefaultArtifactVersion currentVersion = new DefaultArtifactVersion(this.getDescription().getVersion());
+                DefaultArtifactVersion mostRecentVersion = new DefaultArtifactVersion(version);
+                if (!(currentVersion.compareTo(mostRecentVersion) > 0 || currentVersion.equals(mostRecentVersion))) {
+                    this.outdated = true;
+                    this.getScheduler().runTimer(() -> {
+                        this.getLogger().info("&c " + this.getName() + " is out of date! (Version " + this.getDescription().getVersion() + ")");
+                        this.getLogger().info("&cThe newest version is &f" + version);
+                        this.getLogger().info("&cDownload the new version!");
+                    }, 0, 864000);
+                }
+            });
+        }
+
+        DefaultArtifactVersion runningVersion = new DefaultArtifactVersion(Internals.getInstance().getPlugin().getDescription().getVersion());
+        DefaultArtifactVersion requiredVersion = new DefaultArtifactVersion(this.getMinimumEcoVersion());
+        if (!(runningVersion.compareTo(requiredVersion) > 0 || runningVersion.equals(requiredVersion))) {
+            this.getLogger().severe("You are running an outdated version of eco!");
+            this.getLogger().severe("You must be on at least" + this.getMinimumEcoVersion());
+            this.getLogger().severe("Download the newest version here:");
+            this.getLogger().severe("https://polymart.org/download/773/recent/JSpprMspkuyecf5y1wQ2Jn8OoLQSQ_IW");
+            Bukkit.getPluginManager().disablePlugin(this);
+        }
+
+        if (this.getBStatsId() != 0) {
+            new Metrics(this, this.getBStatsId());
+        }
+
+        Set<String> enabledPlugins = Arrays.stream(Bukkit.getPluginManager().getPlugins()).map(Plugin::getName).collect(Collectors.toSet());
+
+        if (enabledPlugins.contains("PlaceholderAPI")) {
+            this.loadedIntegrations.add("PlaceholderAPI");
+            PlaceholderManager.addIntegration(new PlaceholderIntegrationPAPI(this));
+        }
+
+        this.getIntegrationLoaders().forEach((integrationLoader -> {
+            if (enabledPlugins.contains(integrationLoader.getPluginName())) {
+                this.loadedIntegrations.add(integrationLoader.getPluginName());
+                integrationLoader.load();
+            }
+        }));
+
+        this.getLogger().info("Loaded integrations: " + String.join(", ", this.getLoadedIntegrations()));
+
+        Prerequisite.update();
+
+        this.getPacketAdapters().forEach(abstractPacketAdapter -> {
+            if (!abstractPacketAdapter.isPostLoad()) {
+                abstractPacketAdapter.register();
+            }
+        });
+
+        updatableClasses.addAll(this.getUpdatableClasses());
+
+        this.getListeners().forEach(listener -> this.getEventManager().registerListener(listener));
+
+        this.getCommands().forEach(AbstractCommand::register);
+        this.getPluginCommands().forEach(PluginCommand::register);
+
+        this.getScheduler().runLater(this::afterLoad, 1);
+
+        this.updatableClasses.forEach(clazz -> this.getConfigHandler().registerUpdatableClass(clazz));
+
+        if (this.isSupportingExtensions()) {
+            this.getExtensionLoader().loadExtensions();
+
+            if (this.getExtensionLoader().getLoadedExtensions().isEmpty()) {
+                this.getLogger().info("&cNo extensions found");
+            } else {
+                this.getLogger().info("Extensions Loaded:");
+                this.getExtensionLoader().getLoadedExtensions().forEach(extension -> this.getLogger().info("- " + extension.getName() + " v" + extension.getVersion()));
+            }
+        }
+
+        this.enable();
+
+        this.getLogger().info("");
+    }
+
+    /**
+     * Default code to be executed on plugin disable.
+     */
+    @Override
+    public final void onDisable() {
+        super.onDisable();
+
+        this.getEventManager().unregisterAllListeners();
+        this.getScheduler().cancelAll();
+        this.getConfigHandler().saveAllConfigs();
+
+        this.disable();
+
+        if (this.isSupportingExtensions()) {
+            this.getExtensionLoader().unloadExtensions();
+        }
+    }
+
+    /**
+     * Default code to be executed on plugin load.
+     */
+    @Override
+    public final void onLoad() {
+        super.onLoad();
+
+        this.load();
+    }
+
+    /**
+     * Default code to be executed after the server is up.
+     */
+    public final void afterLoad() {
+        this.displayModule = createDisplayModule();
+
+        if (this.getDisplayModule() != null) {
+            Display.registerDisplayModule(this.getDisplayModule());
+        }
+
+        this.getPacketAdapters().forEach(abstractPacketAdapter -> {
+            if (abstractPacketAdapter.isPostLoad()) {
+                abstractPacketAdapter.register();
+            }
+        });
+
+        if (!Prerequisite.HAS_PAPER.isMet()) {
+            this.getLogger().severe("");
+            this.getLogger().severe("----------------------------");
+            this.getLogger().severe("");
+            this.getLogger().severe("You don't seem to be running paper!");
+            this.getLogger().severe("Paper is strongly recommended for all servers,");
+            this.getLogger().severe("and some things may not function properly without it");
+            this.getLogger().severe("Download Paper from &fhttps://papermc.io");
+            this.getLogger().severe("");
+            this.getLogger().severe("----------------------------");
+            this.getLogger().severe("");
+        }
+
+        this.postLoad();
+
+        this.reload();
+
+        this.getLogger().info("Loaded " + this.color + this.pluginName);
+    }
+
+    /**
+     * Default code to be executed on plugin reload.
+     */
+    public final void reload() {
+        this.getConfigHandler().updateConfigs();
+
+        this.getConfigHandler().callUpdate();
+        this.getConfigHandler().callUpdate(); // Call twice to fix issues
+        this.getScheduler().cancelAll();
+
+        this.onReload();
+    }
+
+    /**
+     * The plugin-specific code to be executed on enable.
+     * <p>
+     * Override when needed.
+     */
+    public void enable() {
+
+    }
+
+    /**
+     * The plugin-specific code to be executed on disable.
+     * <p>
+     * Override when needed.
+     */
+    public void disable() {
+
+    }
+
+    /**
+     * The plugin-specific code to be executed on load.
+     * <p>
+     * This is executed before enabling.
+     * <p>
+     * Override when needed.
+     */
+    public void load() {
+
+    }
+
+    /**
+     * The plugin-specific code to be executed on reload.
+     * <p>
+     * Override when needed.
+     */
+    public void onReload() {
+
+    }
+
+    /**
+     * The plugin-specific code to be executed after the server is up.
+     * <p>
+     * Override when needed.
+     */
+    public void postLoad() {
+
+    }
+
+    /**
+     * The plugin-specific integrations to be tested and loaded.
+     *
+     * @return A list of integrations.
+     */
+    public List<IntegrationLoader> getIntegrationLoaders() {
+        return new ArrayList<>();
+    }
+
+    /**
+     * The commands to be registered.
+     *
+     * @return A list of commands.
+     * @deprecated Use {@link this#getPluginCommands()} instead.
+     */
+    @Deprecated
+    public List<AbstractCommand> getCommands() {
+        return new ArrayList<>();
+    }
+
+    /**
+     * The commands to be registered.
+     *
+     * @return A list of commands.
+     */
+    public List<PluginCommand> getPluginCommands() {
+        return new ArrayList<>();
+    }
+
+    /**
+     * ProtocolLib packet adapters to be registered.
+     * <p>
+     * If the plugin does not require ProtocolLib this can be left empty.
+     *
+     * @return A list of packet adapters.
+     */
+    public List<AbstractPacketAdapter> getPacketAdapters() {
+        return new ArrayList<>();
+    }
+
+    /**
+     * All listeners to be registered.
+     *
+     * @return A list of all listeners.
+     */
+    public abstract List<Listener> getListeners();
+
+    /**
+     * All updatable classes.
+     *
+     * @return A list of all updatable classes.
+     */
+    public List<Class<?>> getUpdatableClasses() {
+        return new ArrayList<>();
+    }
+
+    /**
+     * Create the display module for the plugin.
+     *
+     * @return The display module, or null.
+     */
+    @Nullable
+    protected DisplayModule createDisplayModule() {
+        Validate.isTrue(
+                this.getDisplayModule() == null,
+                "Display module exists!"
+        );
+
+        return null;
+    }
+
+    /**
+     * Get the minimum version of eco to use the plugin.
+     *
+     * @return The version.
+     */
+    protected String getMinimumEcoVersion() {
+        return "5.0.0";
+    }
+
+    /**
+     * Get the plugin's logger.
+     *
+     * @return The logger.
+     */
+    @NotNull
+    @Override
+    public Logger getLogger() {
+        return logger;
+    }
+
+    /**
+     * Get unwrapped config.
+     * Does not use eco config system, don't use.
+     *
+     * @return The bukkit config.
+     * @deprecated Use {@link EcoPlugin#getConfigYml()} instead.
+     */
+    @NotNull
+    @Override
+    @Deprecated
+    public final FileConfiguration getConfig() {
+        this.getLogger().warning("Call to default config method in eco plugin!");
+
+        return this.getConfigYml().getHandle();
+    }
+
+    /**
+     * Does not use eco config system, don't use.
+     *
+     * @deprecated Use eco config system.
+     */
+    @Override
+    @Deprecated
+    public final void saveConfig() {
+        this.getLogger().warning("Call to default config method in eco plugin!");
+
+        super.saveConfig();
+    }
+
+    /**
+     * Does not use eco config system, don't use.
+     *
+     * @deprecated Use eco config system.
+     */
+    @Override
+    @Deprecated
+    public final void saveDefaultConfig() {
+        this.getLogger().warning("Call to default config method in eco plugin!");
+
+        super.saveDefaultConfig();
+    }
+
+    /**
+     * Does not use eco config system, don't use.
+     *
+     * @deprecated Use eco config system.
+     */
+    @Override
+    @Deprecated
+    public final void reloadConfig() {
+        this.getLogger().warning("Call to default config method in eco plugin!");
+
+        super.reloadConfig();
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/PluginDependent.java

@@ -0,0 +1,22 @@
+package com.willfp.eco.core;
+
+import lombok.AccessLevel;
+import lombok.Getter;
+import org.jetbrains.annotations.NotNull;
+
+public abstract class PluginDependent<T extends EcoPlugin> {
+    /**
+     * The {@link EcoPlugin} that is stored.
+     */
+    @Getter(AccessLevel.PROTECTED)
+    private final T plugin;
+
+    /**
+     * Pass an {@link EcoPlugin} in order to interface with it.
+     *
+     * @param plugin The plugin to manage.
+     */
+    protected PluginDependent(@NotNull final T plugin) {
+        this.plugin = plugin;
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/Prerequisite.java

@@ -1,8 +1,8 @@
-package com.willfp.eco.util.optional;
+package com.willfp.eco.core;
 
+import com.willfp.eco.core.proxy.ProxyConstants;
 import com.willfp.eco.util.ClassUtils;
 import lombok.Getter;
-import org.bukkit.Bukkit;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
@@ -16,14 +16,6 @@ public class Prerequisite {
      */
     private static final List<Prerequisite> VALUES = new ArrayList<>();
 
-    /**
-     * Requires the server to be running minecraft version 1.16 or higher.
-     */
-    public static final Prerequisite MINIMUM_1_16 = new Prerequisite(
-            () -> !Bukkit.getServer().getClass().getPackage().getName().split("\\.")[3].contains("15"),
-            "Requires minimum server version of 1.16"
-    );
-
     /**
      * Requires the server to be running an implementation of paper.
      */
@@ -32,6 +24,23 @@ public class Prerequisite {
             "Requires server to be running paper (or a fork)"
     );
 
+    /**
+     * Requires the server to be running 1.17.
+     */
+    @Deprecated
+    public static final Prerequisite v1_17 = new Prerequisite(
+            () -> ProxyConstants.NMS_VERSION.contains("17"),
+            "Requires server to be running 1.17+"
+    );
+
+    /**
+     * Requires the server to be running 1.17.
+     */
+    public static final Prerequisite HAS_1_17 = new Prerequisite(
+            () -> ProxyConstants.NMS_VERSION.contains("17"),
+            "Requires server to be running 1.17+"
+    );
+
     /**
      * If the necessary prerequisite condition has been met.
      */

eco-api/src/main/java/com/willfp/eco/core/command/AbstractCommand.java

@@ -1,9 +1,7 @@
-package com.willfp.eco.util.command;
+package com.willfp.eco.core.command;
 
-import com.willfp.eco.util.config.Configs;
-import com.willfp.eco.util.internal.PluginDependent;
-import com.willfp.eco.util.interfaces.Registerable;
-import com.willfp.eco.util.plugin.AbstractEcoPlugin;
+import com.willfp.eco.core.PluginDependent;
+import com.willfp.eco.core.EcoPlugin;
 import org.bukkit.Bukkit;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
@@ -16,7 +14,9 @@ import org.jetbrains.annotations.Nullable;
 import java.util.Arrays;
 import java.util.List;
 
-public abstract class AbstractCommand extends PluginDependent implements CommandExecutor, Registerable {
+@Deprecated
+@SuppressWarnings("DeprecatedIsStillUsed")
+public abstract class AbstractCommand extends PluginDependent<EcoPlugin> implements CommandExecutor {
     /**
      * The name of the command
      * <p>
@@ -45,12 +45,12 @@ public abstract class AbstractCommand extends PluginDependent implements Command
      * <p>
      * The name cannot be the same as an existing command as this will conflict.
      *
-     * @param plugin      The owning {@link AbstractEcoPlugin}.
+     * @param plugin      The owning {@link EcoPlugin}.
      * @param name        The name used in execution.
      * @param permission  The permission required to execute the command.
      * @param playersOnly If only players should be able to execute this command.
      */
-    protected AbstractCommand(@NotNull final AbstractEcoPlugin plugin,
+    protected AbstractCommand(@NotNull final EcoPlugin plugin,
                               @NotNull final String name,
                               @NotNull final String permission,
                               final boolean playersOnly) {
@@ -100,7 +100,7 @@ public abstract class AbstractCommand extends PluginDependent implements Command
      * @param command The bukkit command.
      * @param label   The name of the executed command.
      * @param args    The arguments of the command (anything after the physical command name)
-     * @return If the command was processed by the linked {@link AbstractEcoPlugin}
+     * @return If the command was processed by the linked {@link EcoPlugin}
      */
     @Override
     public final boolean onCommand(@NotNull final CommandSender sender,
@@ -112,12 +112,12 @@ public abstract class AbstractCommand extends PluginDependent implements Command
         }
 
         if (playersOnly && !(sender instanceof Player)) {
-            sender.sendMessage(Configs.LANG.getMessage("not-player"));
+            sender.sendMessage(this.getPlugin().getLangYml().getMessage("not-player"));
             return true;
         }
 
         if (!sender.hasPermission(permission) && sender instanceof Player) {
-            sender.sendMessage(Configs.LANG.getNoPermission());
+            sender.sendMessage(this.getPlugin().getLangYml().getNoPermission());
             return true;
         }
 
@@ -131,7 +131,6 @@ public abstract class AbstractCommand extends PluginDependent implements Command
      * <p>
      * Requires the command name to exist, defined in plugin.yml.
      */
-    @Override
     public final void register() {
         PluginCommand command = Bukkit.getPluginCommand(name);
         assert command != null;

eco-api/src/main/java/com/willfp/eco/core/command/AbstractTabCompleter.java

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.command;
+package com.willfp.eco.core.command;
 
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
@@ -9,6 +9,7 @@ import org.jetbrains.annotations.Nullable;
 import java.util.Arrays;
 import java.util.List;
 
+@Deprecated
 public abstract class AbstractTabCompleter implements TabCompleter {
     /**
      * The {@link AbstractCommand} that is tab-completed.

eco-api/src/main/java/com/willfp/eco/core/command/CommandBase.java

@@ -0,0 +1,48 @@
+package com.willfp.eco.core.command;
+
+import org.jetbrains.annotations.NotNull;
+
+public interface CommandBase {
+    /**
+     * Get command name.
+     *
+     * @return The name.
+     */
+    String getName();
+
+    /**
+     * Get command permission.
+     *
+     * @return The permission.
+     */
+    String getPermission();
+
+    /**
+     * If only players can execute the command.
+     *
+     * @return If true.
+     */
+    boolean isPlayersOnly();
+
+    /**
+     * Add a subcommand to the command.
+     *
+     * @param command The subcommand.
+     * @return The parent command.
+     */
+    CommandBase addSubcommand(@NotNull CommandBase command);
+
+    /**
+     * Get the handler.
+     *
+     * @return The handler.
+     */
+    CommandHandler getHandler();
+
+    /**
+     * Get the tab completer.
+     *
+     * @return The tab completer.
+     */
+    TabCompleteHandler getTabCompleter();
+}

eco-api/src/main/java/com/willfp/eco/core/command/CommandHandler.java

@@ -0,0 +1,18 @@
+package com.willfp.eco.core.command;
+
+import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.List;
+
+@FunctionalInterface
+public interface CommandHandler {
+    /**
+     * The code to be called on execution.
+     *
+     * @param sender The sender.
+     * @param args   The arguments.
+     */
+    void onExecute(@NotNull CommandSender sender,
+                   @NotNull List<String> args);
+}

eco-api/src/main/java/com/willfp/eco/core/command/TabCompleteHandler.java

@@ -0,0 +1,19 @@
+package com.willfp.eco.core.command;
+
+import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.List;
+
+@FunctionalInterface
+public interface TabCompleteHandler {
+    /**
+     * Handle Tab Completion.
+     *
+     * @param sender The sender.
+     * @param args   The arguments.
+     * @return The tab completion results.
+     */
+    List<String> tabComplete(@NotNull CommandSender sender,
+                             @NotNull List<String> args);
+}

eco-api/src/main/java/com/willfp/eco/core/command/impl/PluginCommand.java

@@ -0,0 +1,92 @@
+package com.willfp.eco.core.command.impl;
+
+import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.internal.commands.HandledCommand;
+import org.bukkit.Bukkit;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandExecutor;
+import org.bukkit.command.CommandSender;
+import org.bukkit.command.TabCompleter;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.List;
+
+public abstract class PluginCommand extends HandledCommand implements CommandExecutor, TabCompleter {
+    /**
+     * Create a new command.
+     * <p>
+     * The command will not be registered until {@link this#register()} is called.
+     * <p>
+     * The name cannot be the same as an existing command as this will conflict.
+     *
+     * @param plugin      The plugin.
+     * @param name        The name used in execution.
+     * @param permission  The permission required to execute the command.
+     * @param playersOnly If only players should be able to execute this command.
+     */
+    protected PluginCommand(@NotNull final EcoPlugin plugin,
+                            @NotNull final String name,
+                            @NotNull final String permission,
+                            final boolean playersOnly) {
+        super(plugin, name, permission, playersOnly);
+    }
+
+    /**
+     * Registers the command with the server,
+     * <p>
+     * Requires the command name to exist, defined in plugin.yml.
+     */
+    public final void register() {
+        org.bukkit.command.PluginCommand command = Bukkit.getPluginCommand(this.getName());
+        assert command != null;
+        command.setExecutor(this);
+        command.setTabCompleter(this);
+    }
+
+    /**
+     * Internal implementation used to clean up boilerplate.
+     * Used for parity with {@link CommandExecutor#onCommand(CommandSender, Command, String, String[])}.
+     *
+     * @param sender  The executor of the command.
+     * @param command The bukkit command.
+     * @param label   The name of the executed command.
+     * @param args    The arguments of the command (anything after the physical command name)
+     * @return If the command was processed by the linked {@link EcoPlugin}
+     */
+    @Override
+    public final boolean onCommand(@NotNull final CommandSender sender,
+                                   @NotNull final Command command,
+                                   @NotNull final String label,
+                                   @NotNull final String[] args) {
+        if (!command.getName().equalsIgnoreCase(this.getName())) {
+            return false;
+        }
+
+        this.handle(sender, args);
+
+        return true;
+    }
+
+    /**
+     * Internal implementation used to clean up boilerplate.
+     * Used for parity with {@link TabCompleter#onTabComplete(CommandSender, Command, String, String[])}.
+     *
+     * @param sender  The executor of the command.
+     * @param command The bukkit command.
+     * @param label   The name of the executed command.
+     * @param args    The arguments of the command (anything after the physical command name).
+     * @return The list of tab-completions.
+     */
+    @Override
+    public @Nullable List<String> onTabComplete(@NotNull final CommandSender sender,
+                                                @NotNull final Command command,
+                                                @NotNull final String label,
+                                                @NotNull final String[] args) {
+        if (!command.getName().equalsIgnoreCase(this.getName())) {
+            return null;
+        }
+
+        return this.handleTabCompletion(sender, args);
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/command/impl/Subcommand.java

@@ -0,0 +1,36 @@
+package com.willfp.eco.core.command.impl;
+
+import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.core.command.CommandBase;
+import com.willfp.eco.internal.commands.HandledCommand;
+import org.jetbrains.annotations.NotNull;
+
+public abstract class Subcommand extends HandledCommand {
+    /**
+     * Create subcommand.
+     *
+     * @param plugin      The plugin.
+     * @param name        The subcommand name.
+     * @param permission  The subcommand permission.
+     * @param playersOnly If the subcommand only works on players.
+     */
+    protected Subcommand(@NotNull final EcoPlugin plugin,
+                         @NotNull final String name,
+                         @NotNull final String permission,
+                         final boolean playersOnly) {
+        super(plugin, name, permission, playersOnly);
+    }
+
+    /**
+     * Create subcommand.
+     *
+     * @param plugin      The plugin.
+     * @param name   The name of the subcommand.
+     * @param parent The parent command.
+     */
+    protected Subcommand(@NotNull final EcoPlugin plugin,
+                         @NotNull final String name,
+                         @NotNull final CommandBase parent) {
+        super(plugin, name, parent.getPermission(), parent.isPlayersOnly());
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/config/BaseConfig.java

@@ -0,0 +1,40 @@
+package com.willfp.eco.core.config;
+
+import com.willfp.eco.internal.config.yaml.UpdatableYamlConfig;
+import com.willfp.eco.core.EcoPlugin;
+import org.jetbrains.annotations.NotNull;
+
+public abstract class BaseConfig extends UpdatableYamlConfig {
+
+    /**
+     * Config implementation for configs present in the plugin's base directory (eg config.yml, lang.yml).
+     * <p>
+     * Automatically updates.
+     *
+     * @param configName      The name of the config
+     * @param removeUnused    Whether keys not present in the default config should be removed on update.
+     * @param plugin          The plugin.
+     * @param updateBlacklist Substring of keys to not add/remove keys for.
+     */
+    protected BaseConfig(@NotNull final String configName,
+                         final boolean removeUnused,
+                         @NotNull final EcoPlugin plugin,
+                         @NotNull final String... updateBlacklist) {
+        super(configName, plugin, "", plugin.getClass(), removeUnused, updateBlacklist);
+    }
+
+    /**
+     * Config implementation for configs present in the plugin's base directory (eg config.yml, lang.yml).
+     * <p>
+     * Automatically updates.
+     *
+     * @param configName      The name of the config
+     * @param removeUnused    Whether keys not present in the default config should be removed on update.
+     * @param plugin          The plugin.
+     */
+    protected BaseConfig(@NotNull final String configName,
+                         final boolean removeUnused,
+                         @NotNull final EcoPlugin plugin) {
+        super(configName, plugin, "", plugin.getClass(), removeUnused, "");
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/config/Config.java

@@ -0,0 +1,226 @@
+package com.willfp.eco.core.config;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.List;
+
+public interface Config {
+    /**
+     * Clears cache.
+     */
+    void clearCache();
+
+    /**
+     * Convert the config into readable text.
+     *
+     * @return The plaintext.
+     */
+    String toPlaintext();
+
+    /**
+     * Get if the config contains a key.
+     *
+     * @param path The key to check.
+     * @return If contained.
+     */
+    boolean has(@NotNull String path);
+
+    /**
+     * Get config keys.
+     *
+     * @param deep If keys from subsections should be fetched too.
+     * @return A list of keys.
+     */
+    @NotNull
+    List<String> getKeys(boolean deep);
+
+    /**
+     * Get an object from config.
+     * Default implementations call {@link org.bukkit.configuration.file.YamlConfiguration#get(String)}.
+     *
+     * @param path The path.
+     * @return The object.
+     */
+    @Nullable
+    Object get(@NotNull String path);
+
+    /**
+     * Set an object in config.
+     * Default implementations call {@link org.bukkit.configuration.file.YamlConfiguration#set(String, Object)}
+     *
+     * @param path   The path.
+     * @param object The object.
+     */
+    void set(@NotNull String path,
+             @Nullable Object object);
+
+    /**
+     * Get subsection from config.
+     *
+     * @param path The key to check.
+     * @return The subsection. Throws NPE if not found.
+     */
+    @NotNull
+    Config getSubsection(@NotNull String path);
+
+    /**
+     * Get subsection from config.
+     *
+     * @param path The key to check.
+     * @return The subsection, or null if not found.
+     */
+    @Nullable
+    Config getSubsectionOrNull(@NotNull String path);
+
+    /**
+     * Get an integer from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or 0 if not found.
+     */
+    int getInt(@NotNull String path);
+
+    /**
+     * Get an integer from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or null if not found.
+     */
+    @Nullable
+    Integer getIntOrNull(@NotNull String path);
+
+    /**
+     * Get an integer from config with a specified default (not found) value.
+     *
+     * @param path The key to fetch the value from.
+     * @param def  The value to default to if not found.
+     * @return The found value, or the default.
+     */
+    int getInt(@NotNull String path,
+               int def);
+
+    /**
+     * Get a list of integers from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or a blank {@link java.util.ArrayList} if not found.
+     */
+    @NotNull
+    List<Integer> getInts(@NotNull String path);
+
+    /**
+     * Get a list of integers from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or null if not found.
+     */
+    @Nullable
+    List<Integer> getIntsOrNull(@NotNull String path);
+
+    /**
+     * Get a boolean from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or false if not found.
+     */
+    boolean getBool(@NotNull String path);
+
+    /**
+     * Get a boolean from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or null if not found.
+     */
+    @Nullable
+    Boolean getBoolOrNull(@NotNull String path);
+
+    /**
+     * Get a list of booleans from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or a blank {@link java.util.ArrayList} if not found.
+     */
+    @NotNull
+    List<Boolean> getBools(@NotNull String path);
+
+    /**
+     * Get a list of booleans from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or null if not found.
+     */
+    @Nullable
+    List<Boolean> getBoolsOrNull(@NotNull String path);
+
+    /**
+     * Get a string from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or an empty string if not found.
+     */
+    @NotNull
+    String getString(@NotNull String path);
+
+    /**
+     * Get a string from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or null if not found.
+     */
+    @Nullable
+    String getStringOrNull(@NotNull String path);
+
+    /**
+     * Get a list of strings from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or a blank {@link java.util.ArrayList} if not found.
+     */
+    @NotNull
+    List<String> getStrings(@NotNull String path);
+
+    /**
+     * Get a list of strings from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or null if not found.
+     */
+    @Nullable
+    List<String> getStringsOrNull(@NotNull String path);
+
+    /**
+     * Get a decimal from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or 0 if not found.
+     */
+    double getDouble(@NotNull String path);
+
+    /**
+     * Get a decimal from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or null if not found.
+     */
+    @Nullable
+    Double getDoubleOrNull(@NotNull String path);
+
+    /**
+     * Get a list of decimals from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or a blank {@link java.util.ArrayList} if not found.
+     */
+    @NotNull
+    List<Double> getDoubles(@NotNull String path);
+
+    /**
+     * Get a list of decimals from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or null if not found.
+     */
+    @Nullable
+    List<Double> getDoublesOrNull(@NotNull String path);
+}

eco-api/src/main/java/com/willfp/eco/core/config/ConfigHandler.java

@@ -0,0 +1,35 @@
+package com.willfp.eco.core.config;
+
+import com.willfp.eco.internal.config.LoadableConfig;
+import org.jetbrains.annotations.NotNull;
+
+public interface ConfigHandler {
+    /**
+     * Invoke all update methods.
+     */
+    void callUpdate();
+
+    /**
+     * Register an updatable class.
+     *
+     * @param updatableClass The class with an update method.
+     */
+    void registerUpdatableClass(@NotNull Class<?> updatableClass);
+
+    /**
+     * Save all configs.
+     */
+    void saveAllConfigs();
+
+    /**
+     * Update all updatable configs.
+     */
+    void updateConfigs();
+
+    /**
+     * Add new config to be saved.
+     *
+     * @param config The config.
+     */
+    void addConfig(@NotNull LoadableConfig config);
+}

eco-api/src/main/java/com/willfp/eco/core/config/ConfigUpdater.java

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.config.updating.annotations;
+package com.willfp.eco.core.config;
 
 import java.lang.annotation.ElementType;
 import java.lang.annotation.Retention;

eco-api/src/main/java/com/willfp/eco/core/config/ExtendableConfig.java

@@ -0,0 +1,28 @@
+package com.willfp.eco.core.config;
+
+import com.willfp.eco.internal.config.yaml.UpdatableYamlConfig;
+import com.willfp.eco.core.EcoPlugin;
+import org.jetbrains.annotations.NotNull;
+
+public abstract class ExtendableConfig extends UpdatableYamlConfig {
+    /**
+     * Config implementation for configs present in the plugin's base directory (eg config.yml, lang.yml).
+     * <p>
+     * Automatically updates.
+     *
+     * @param configName       The name of the config
+     * @param removeUnused     Whether keys not present in the default config should be removed on update.
+     * @param plugin           The plugin.
+     * @param updateBlacklist  Substring of keys to not add/remove keys for.
+     * @param subDirectoryPath The subdirectory path.
+     * @param source           The class that owns the resource.
+     */
+    protected ExtendableConfig(@NotNull final String configName,
+                               final boolean removeUnused,
+                               @NotNull final EcoPlugin plugin,
+                               @NotNull final Class<?> source,
+                               @NotNull final String subDirectoryPath,
+                               @NotNull final String... updateBlacklist) {
+        super(configName, plugin, subDirectoryPath, source, removeUnused, updateBlacklist);
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/config/JSONConfig.java

@@ -0,0 +1,26 @@
+package com.willfp.eco.core.config;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.List;
+
+public interface JSONConfig extends Config {
+    /**
+     * Get a list of subsections from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or a blank {@link java.util.ArrayList} if not found.
+     */
+    @NotNull
+    List<JSONConfig> getSubsections(@NotNull String path);
+
+    /**
+     * Get a list of subsections from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or null if not found.
+     */
+    @Nullable
+    List<JSONConfig> getSubsectionsOrNull(@NotNull String path);
+}

eco-api/src/main/java/com/willfp/eco/core/config/JsonStaticBaseConfig.java

@@ -0,0 +1,20 @@
+package com.willfp.eco.core.config;
+
+import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.internal.config.json.LoadableJsonConfig;
+import org.jetbrains.annotations.NotNull;
+
+public abstract class JsonStaticBaseConfig extends LoadableJsonConfig {
+    /**
+     * Config implementation for configs present in the plugin's base directory (eg config.json, lang.json).
+     * <p>
+     * Does not automatically update.
+     *
+     * @param configName The name of the config
+     * @param plugin     The plugin.
+     */
+    protected JsonStaticBaseConfig(@NotNull final String configName,
+                                   @NotNull final EcoPlugin plugin) {
+        super(configName, plugin, "", plugin.getClass());
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/config/StaticBaseConfig.java

@@ -0,0 +1,20 @@
+package com.willfp.eco.core.config;
+
+import com.willfp.eco.internal.config.yaml.LoadableYamlConfig;
+import com.willfp.eco.core.EcoPlugin;
+import org.jetbrains.annotations.NotNull;
+
+public abstract class StaticBaseConfig extends LoadableYamlConfig {
+    /**
+     * Config implementation for configs present in the plugin's base directory (eg config.yml, lang.yml).
+     * <p>
+     * Does not automatically update.
+     *
+     * @param configName The name of the config
+     * @param plugin     The plugin.
+     */
+    protected StaticBaseConfig(@NotNull final String configName,
+                               @NotNull final EcoPlugin plugin) {
+        super(configName, plugin, "", plugin.getClass());
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/config/YamlConfig.java

@@ -0,0 +1,18 @@
+package com.willfp.eco.core.config;
+
+import com.willfp.eco.internal.config.yaml.YamlConfigWrapper;
+import org.bukkit.configuration.file.YamlConfiguration;
+import org.jetbrains.annotations.NotNull;
+
+public abstract class YamlConfig extends YamlConfigWrapper<YamlConfiguration> {
+    /**
+     * Config implementation for passing YamlConfigurations.
+     * <p>
+     * Does not automatically update.
+     *
+     * @param config     The YamlConfiguration handle.
+     */
+    public YamlConfig(@NotNull final YamlConfiguration config) {
+        init(config);
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/config/base/ConfigYml.java

@@ -0,0 +1,17 @@
+package com.willfp.eco.core.config.base;
+
+import com.willfp.eco.core.config.BaseConfig;
+import com.willfp.eco.core.EcoPlugin;
+import org.jetbrains.annotations.NotNull;
+
+
+public class ConfigYml extends BaseConfig {
+    /**
+     * Config.yml.
+     *
+     * @param plugin The plugin.
+     */
+    public ConfigYml(@NotNull final EcoPlugin plugin) {
+        super("config", true, plugin);
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/config/base/LangYml.java

@@ -1,15 +1,17 @@
-package com.willfp.eco.util.config.configs;
+package com.willfp.eco.core.config.base;
 
-import com.willfp.eco.util.StringUtils;
-import com.willfp.eco.util.config.BaseConfig;
+import com.willfp.eco.core.config.BaseConfig;
+import com.willfp.eco.core.EcoPlugin;
 import org.jetbrains.annotations.NotNull;
 
-public class Lang extends BaseConfig {
+public class LangYml extends BaseConfig {
     /**
-     * lang.yml.
+     * Lang.yml.
+     *
+     * @param plugin The plugin.
      */
-    public Lang() {
-        super("lang", false);
+    public LangYml(@NotNull final EcoPlugin plugin) {
+        super("lang", false, plugin);
     }
 
     /**
@@ -18,7 +20,7 @@ public class Lang extends BaseConfig {
      * @return The prefix.
      */
     public String getPrefix() {
-        return StringUtils.translate(this.getConfig().getString("messages.prefix"));
+        return this.getString("messages.prefix");
     }
 
     /**
@@ -27,7 +29,7 @@ public class Lang extends BaseConfig {
      * @return The message.
      */
     public String getNoPermission() {
-        return getPrefix() + StringUtils.translate(this.getConfig().getString("messages.no-permission"));
+        return getPrefix() + this.getString("messages.no-permission");
     }
 
     /**
@@ -37,6 +39,6 @@ public class Lang extends BaseConfig {
      * @return The message with a prefix appended.
      */
     public String getMessage(@NotNull final String message) {
-        return getPrefix() + StringUtils.translate(this.getConfig().getString("messages." + message));
+        return getPrefix() + this.getString("messages." + message);
     }
 }

eco-api/src/main/java/com/willfp/eco/core/data/Data.java

@@ -0,0 +1,85 @@
+package com.willfp.eco.core.data;
+
+import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.core.config.Config;
+import com.willfp.eco.core.config.JSONConfig;
+import com.willfp.eco.core.config.JsonStaticBaseConfig;
+import com.willfp.eco.internal.config.LoadableConfig;
+import com.willfp.eco.internal.config.json.JsonConfigSection;
+import lombok.experimental.UtilityClass;
+import org.bukkit.OfflinePlayer;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.UUID;
+
+@UtilityClass
+public class Data {
+    /**
+     * Instance of eco data.yml.
+     */
+    private static JSONConfig datafile = null;
+
+    /**
+     * All cached player data.
+     */
+    private static final Map<UUID, Map<EcoPlugin, JSONConfig>> PLAYER_DATA = new HashMap<>();
+
+    /**
+     * Initialize the player data with an instance of data.json.
+     *
+     * @param config data.json.
+     */
+    @ApiStatus.Internal
+    public void init(@NotNull final JsonStaticBaseConfig config) {
+        datafile = config;
+    }
+
+    /**
+     * Save to data.yml.
+     *
+     * @param config Instance of data.yml.
+     * @throws IOException Error during saving.
+     */
+    @ApiStatus.Internal
+    public void save(@NotNull final Config config) throws IOException {
+        for (Map.Entry<UUID, Map<EcoPlugin, JSONConfig>> entry : PLAYER_DATA.entrySet()) {
+            entry.getValue().forEach((plugin, jsonConfig) -> {
+                for (String key : jsonConfig.getKeys(false)) {
+                    config.set("player-data." + plugin.getName().toLowerCase() + "." + entry.getKey().toString() + "." + key, jsonConfig);
+                }
+            });
+        }
+        ((LoadableConfig) config).save();
+    }
+
+    /**
+     * Get the data for a player.
+     *
+     * @param player The player.
+     * @param plugin The plugin.
+     * @return The data.
+     */
+    public JSONConfig getData(@NotNull final OfflinePlayer player,
+                              @NotNull final EcoPlugin plugin) {
+        if (!PLAYER_DATA.containsKey(player.getUniqueId())) {
+            PLAYER_DATA.put(player.getUniqueId(), new HashMap<>());
+        }
+
+        JSONConfig config = PLAYER_DATA.get(player.getUniqueId()).get(plugin);
+
+        if (config == null) {
+            config = (JSONConfig) datafile.getSubsectionOrNull("player-data." + plugin.getName().toLowerCase() + "." + player.getUniqueId());
+            if (config == null) {
+                config = new JsonConfigSection(new HashMap<>());
+            }
+            PLAYER_DATA.get(player.getUniqueId()).put(plugin, config);
+            return getData(player, plugin);
+        }
+
+        return config;
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/display/Display.java

@@ -0,0 +1,216 @@
+package com.willfp.eco.core.display;
+
+import lombok.experimental.UtilityClass;
+import org.apache.commons.lang.Validate;
+import org.bukkit.NamespacedKey;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.meta.ItemMeta;
+import org.bukkit.persistence.PersistentDataContainer;
+import org.bukkit.persistence.PersistentDataType;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+@UtilityClass
+public class Display {
+    /**
+     * The prefix for lore lines.
+     */
+    public static final String PREFIX = "§z";
+
+    /**
+     * All registered display modules.
+     */
+    private static final Map<DisplayPriority, List<DisplayModule>> MODULES = new HashMap<>();
+
+    /**
+     * NamespacedKey for finalizing.
+     */
+    private static NamespacedKey finalizeKey = null;
+
+    /**
+     * Register display module.
+     *
+     * @param module The module.
+     */
+    public void registerDisplayModule(@NotNull final DisplayModule module) {
+        List<DisplayModule> modules = MODULES.get(module.getPriority());
+
+        modules.removeIf(module1 -> module1.getPluginName().equalsIgnoreCase(module.getPluginName()));
+
+        modules.add(module);
+
+        MODULES.put(module.getPriority(), modules);
+    }
+
+    /**
+     * Display on ItemStacks.
+     *
+     * @param itemStack The item.
+     * @return The itemstack.
+     */
+    public ItemStack display(@NotNull final ItemStack itemStack) {
+        if (!itemStack.hasItemMeta()) {
+            return itemStack; // return early if there's no customization of the item
+        }
+
+        Map<String, Object[]> pluginVarArgs = new HashMap<>();
+
+        for (DisplayPriority priority : DisplayPriority.values()) {
+            List<DisplayModule> modules = MODULES.get(priority);
+            for (DisplayModule module : modules) {
+                pluginVarArgs.put(module.getPluginName(), module.generateVarArgs(itemStack));
+            }
+        }
+
+        revert(itemStack);
+
+        ItemMeta meta = itemStack.getItemMeta();
+
+        if (meta == null) {
+            return itemStack;
+        }
+
+        for (DisplayPriority priority : DisplayPriority.values()) {
+            List<DisplayModule> modules = MODULES.get(priority);
+            for (DisplayModule module : modules) {
+                Object[] varargs = pluginVarArgs.get(module.getPluginName());
+                module.display(itemStack, varargs);
+            }
+        }
+
+        return itemStack;
+    }
+
+    /**
+     * Display on ItemStacks and then finalize.
+     *
+     * @param itemStack The item.
+     * @return The itemstack.
+     */
+    public ItemStack displayAndFinalize(@NotNull final ItemStack itemStack) {
+        return finalize(display(itemStack));
+    }
+
+    /**
+     * Revert on ItemStacks.
+     *
+     * @param itemStack The item.
+     * @return The itemstack.
+     */
+    public ItemStack revert(@NotNull final ItemStack itemStack) {
+        if (Display.isFinalized(itemStack)) {
+            unfinalize(itemStack);
+        }
+
+        if (!itemStack.hasItemMeta()) {
+            return itemStack;
+        }
+
+        ItemMeta meta = itemStack.getItemMeta();
+
+        if (meta == null) {
+            return itemStack;
+        }
+
+        List<String> lore = meta.getLore();
+
+        if (lore != null && lore.removeIf(line -> line.startsWith(Display.PREFIX))) { // only apply lore modification if needed
+            meta.setLore(lore);
+            itemStack.setItemMeta(meta);
+        }
+
+        for (DisplayPriority priority : DisplayPriority.values()) {
+            List<DisplayModule> modules = MODULES.get(priority);
+            for (DisplayModule module : modules) {
+                module.revert(itemStack);
+            }
+        }
+
+        return itemStack;
+    }
+
+    /**
+     * Finalize an ItemStacks.
+     *
+     * @param itemStack The item.
+     * @return The itemstack.
+     */
+    public ItemStack finalize(@NotNull final ItemStack itemStack) {
+        Validate.notNull(finalizeKey, "Key cannot be null!");
+
+        if (itemStack.getType().getMaxStackSize() > 1) {
+            return itemStack;
+        }
+
+        ItemMeta meta = itemStack.getItemMeta();
+        if (meta == null) {
+            return itemStack;
+        }
+
+        PersistentDataContainer container = meta.getPersistentDataContainer();
+        container.set(finalizeKey, PersistentDataType.INTEGER, 1);
+        itemStack.setItemMeta(meta);
+        return itemStack;
+    }
+
+    /**
+     * Unfinalize an ItemStacks.
+     *
+     * @param itemStack The item.
+     * @return The itemstack.
+     */
+    public ItemStack unfinalize(@NotNull final ItemStack itemStack) {
+        Validate.notNull(finalizeKey, "Key cannot be null!");
+
+        ItemMeta meta = itemStack.getItemMeta();
+
+        if (meta == null) {
+            return itemStack;
+        }
+
+        PersistentDataContainer container = meta.getPersistentDataContainer();
+        container.remove(finalizeKey);
+        itemStack.setItemMeta(meta);
+        return itemStack;
+    }
+
+    /**
+     * If an item is finalized.
+     *
+     * @param itemStack The item.
+     * @return If finalized.
+     */
+    public boolean isFinalized(@NotNull final ItemStack itemStack) {
+        Validate.notNull(finalizeKey, "Key cannot be null!");
+
+        ItemMeta meta = itemStack.getItemMeta();
+
+        if (meta == null) {
+            return false;
+        }
+
+        PersistentDataContainer container = meta.getPersistentDataContainer();
+        return container.has(finalizeKey, PersistentDataType.INTEGER);
+    }
+
+    /**
+     * Set key to be used for finalization.
+     *
+     * @param finalizeKey The key.
+     */
+    @ApiStatus.Internal
+    public static void setFinalizeKey(@NotNull final NamespacedKey finalizeKey) {
+        Display.finalizeKey = finalizeKey;
+    }
+
+    static {
+        for (DisplayPriority priority : DisplayPriority.values()) {
+            MODULES.put(priority, new ArrayList<>());
+        }
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/display/DisplayModule.java

@@ -0,0 +1,66 @@
+package com.willfp.eco.core.display;
+
+import com.willfp.eco.core.PluginDependent;
+import com.willfp.eco.core.EcoPlugin;
+import lombok.Getter;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.NotNull;
+
+public abstract class DisplayModule extends PluginDependent<EcoPlugin> {
+    /**
+     * The priority of the module.
+     */
+    @Getter
+    private final DisplayPriority priority;
+
+    /**
+     * Create a new display module.
+     *
+     * @param plugin   The plugin that the display is for.
+     * @param priority The priority of the module.
+     */
+    protected DisplayModule(@NotNull final EcoPlugin plugin,
+                            @NotNull final DisplayPriority priority) {
+        super(plugin);
+        this.priority = priority;
+    }
+
+    /**
+     * Display an item.
+     *
+     * @param itemStack The item.
+     * @param args      Optional args for display.
+     */
+    protected void display(@NotNull final ItemStack itemStack,
+                           @NotNull final Object... args) {
+        // Technically optional.
+    }
+
+    /**
+     * Revert an item.
+     *
+     * @param itemStack The item.
+     */
+    protected void revert(@NotNull final ItemStack itemStack) {
+        // Technically optional.
+    }
+
+    /**
+     * Create varargs to pass back to itemstack after reverting, but before display.
+     *
+     * @param itemStack The itemStack.
+     * @return The plugin-specific varargs.
+     */
+    protected Object[] generateVarArgs(@NotNull final ItemStack itemStack) {
+        return new Object[0];
+    }
+
+    /**
+     * Get name of plugin.
+     *
+     * @return The plugin name.
+     */
+    final String getPluginName() {
+        return super.getPlugin().getName();
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/display/DisplayPriority.java

@@ -0,0 +1,23 @@
+package com.willfp.eco.core.display;
+
+public enum DisplayPriority {
+    /**
+     * Ran first.
+     */
+    LOWEST,
+
+    /**
+     * Ran second.
+     */
+    LOW,
+
+    /**
+     * Ran third.
+     */
+    HIGH,
+
+    /**
+     * Ran last.
+     */
+    HIGHEST
+}

eco-api/src/main/java/com/willfp/eco/core/drops/DropQueue.java

@@ -1,10 +1,10 @@
-package com.willfp.eco.util.drops;
+package com.willfp.eco.core.drops;
 
-import com.willfp.eco.util.drops.internal.AbstractDropQueue;
-import com.willfp.eco.util.drops.internal.DropManager;
-import com.willfp.eco.util.drops.internal.DropQueueType;
-import com.willfp.eco.util.drops.internal.FastCollatedDropQueue;
-import com.willfp.eco.util.drops.internal.InternalDropQueue;
+import com.willfp.eco.internal.drops.AbstractDropQueue;
+import com.willfp.eco.internal.drops.DropManager;
+import com.willfp.eco.internal.drops.DropQueueType;
+import com.willfp.eco.internal.drops.impl.FastCollatedDropQueue;
+import com.willfp.eco.internal.drops.impl.InternalDropQueue;
 import org.bukkit.Location;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;

eco-api/src/main/java/com/willfp/eco/core/events/ArmorEquipEvent.java

@@ -0,0 +1,31 @@
+package com.willfp.eco.core.events;
+
+import org.bukkit.entity.Player;
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.player.PlayerEvent;
+import org.jetbrains.annotations.NotNull;
+
+
+public class ArmorEquipEvent extends PlayerEvent {
+    private static final HandlerList HANDLERS = new HandlerList();
+
+    public ArmorEquipEvent(@NotNull final Player player) {
+        super(player);
+    }
+
+    /**
+     * Gets a list of handlers handling this event.
+     *
+     * @return A list of handlers handling this event.
+     */
+
+    @Override
+    @NotNull
+    public HandlerList getHandlers() {
+        return HANDLERS;
+    }
+
+    public static HandlerList getHandlerList() {
+        return HANDLERS;
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/events/EntityDeathByEntityEvent.java

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.events.entitydeathbyentity;
+package com.willfp.eco.core.events;
 
 import lombok.Getter;
 import org.bukkit.entity.Entity;

eco-api/src/main/java/com/willfp/eco/core/events/EventManager.java

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.bukkit.events;
+package com.willfp.eco.core.events;
 
 import org.bukkit.event.Listener;
 

eco-api/src/main/java/com/willfp/eco/core/events/NaturalExpGainEvent.java

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.events.naturalexpgainevent;
+package com.willfp.eco.core.events;
 
 import lombok.Getter;
 import org.bukkit.event.Event;

eco-api/src/main/java/com/willfp/eco/core/events/PlayerJumpEvent.java

@@ -0,0 +1,40 @@
+package com.willfp.eco.core.events;
+
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.player.PlayerMoveEvent;
+import org.jetbrains.annotations.NotNull;
+
+public class PlayerJumpEvent extends PlayerMoveEvent {
+    /**
+     * Internal bukkit.
+     */
+    private static final HandlerList HANDLERS = new HandlerList();
+
+    /**
+     * Create a new PlayerJumpEvent.
+     *
+     * @param event The PlayerMoveEvent.
+     */
+    public PlayerJumpEvent(@NotNull final PlayerMoveEvent event) {
+        super(event.getPlayer(), event.getFrom(), event.getTo());
+    }
+
+    /**
+     * Internal bukkit.
+     *
+     * @return The handlers.
+     */
+    @Override
+    public @NotNull HandlerList getHandlers() {
+        return HANDLERS;
+    }
+
+    /**
+     * Internal bukkit.
+     *
+     * @return The handlers.
+     */
+    public static @NotNull HandlerList getHandlerList() {
+        return HANDLERS;
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/extensions/Extension.java

@@ -1,18 +1,27 @@
-package com.willfp.eco.util.extensions;
+package com.willfp.eco.core.extensions;
 
-import com.willfp.eco.util.plugin.AbstractEcoPlugin;
+import com.willfp.eco.internal.extensions.ExtensionMetadata;
+import com.willfp.eco.core.EcoPlugin;
 import lombok.AccessLevel;
 import lombok.Getter;
 import org.apache.commons.lang.Validate;
-import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 
 public abstract class Extension {
     /**
-     * The {@link AbstractEcoPlugin} that this extension is for.
+     * The {@link EcoPlugin} that this extension is for.
      */
     @Getter(AccessLevel.PROTECTED)
-    private final AbstractEcoPlugin plugin = AbstractEcoPlugin.getInstance();
+    private final EcoPlugin plugin;
+
+    /**
+     * Create a new extension for a plugin.
+     *
+     * @param plugin The plugin.
+     */
+    protected Extension(@NotNull final EcoPlugin plugin) {
+        this.plugin = plugin;
+    }
 
     /**
      * Metadata containing version and name.
@@ -62,7 +71,7 @@ public abstract class Extension {
      */
     public final String getName() {
         Validate.notNull(metadata, "Metadata cannot be null!");
-        return this.metadata.name;
+        return this.metadata.name();
     }
 
     /**
@@ -72,36 +81,6 @@ public abstract class Extension {
      */
     public final String getVersion() {
         Validate.notNull(metadata, "Metadata cannot be null!");
-        return this.metadata.version;
-    }
-
-    /**
-     * Wrapper for the string and version of the extension.
-     * Contains versions and name.
-     * Designed for internal use.
-     */
-    @ApiStatus.Internal
-    public static final class ExtensionMetadata {
-        /**
-         * The version of the extension.
-         */
-        private final @NotNull String version;
-
-        /**
-         * The extension's name.
-         */
-        private final @NotNull String name;
-
-        /**
-         * Create a new extension metadata.
-         *
-         * @param version The version for the extension to be.
-         * @param name    The name of the extension.
-         */
-        public ExtensionMetadata(@NotNull final String version,
-                                 @NotNull final String name) {
-            this.version = version;
-            this.name = name;
-        }
+        return this.metadata.version();
     }
 }

eco-api/src/main/java/com/willfp/eco/core/extensions/ExtensionLoader.java

@@ -1,6 +1,4 @@
-package com.willfp.eco.util.extensions.loader;
-
-import com.willfp.eco.util.extensions.Extension;
+package com.willfp.eco.core.extensions;
 
 import java.util.Set;
 
@@ -20,11 +18,6 @@ public interface ExtensionLoader {
      */
     void unloadExtensions();
 
-    /**
-     * Reload all extensions.
-     */
-    void reloadExtensions();
-
     /**
      * Retrieve a set of all loaded extensions.
      *

eco-api/src/main/java/com/willfp/eco/core/extensions/MalformedExtensionException.java

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.extensions;
+package com.willfp.eco.core.extensions;
 
 import org.jetbrains.annotations.NotNull;
 

eco-api/src/main/java/com/willfp/eco/core/factory/MetadataValueFactory.java

@@ -0,0 +1,14 @@
+package com.willfp.eco.core.factory;
+
+import org.bukkit.metadata.FixedMetadataValue;
+import org.jetbrains.annotations.NotNull;
+
+public interface MetadataValueFactory {
+    /**
+     * Create a metadata value for a given plugin and object.
+     *
+     * @param value The object to store in metadata.
+     * @return The metadata value.
+     */
+    FixedMetadataValue create(@NotNull Object value);
+}

eco-api/src/main/java/com/willfp/eco/core/factory/NamespacedKeyFactory.java

@@ -0,0 +1,14 @@
+package com.willfp.eco.core.factory;
+
+import org.bukkit.NamespacedKey;
+import org.jetbrains.annotations.NotNull;
+
+public interface NamespacedKeyFactory {
+    /**
+     * Create an {@link NamespacedKey} associated with an {@link com.willfp.eco.core.EcoPlugin}.
+     *
+     * @param key The key in the {@link NamespacedKey}.
+     * @return The created {@link NamespacedKey}.
+     */
+    NamespacedKey create(@NotNull String key);
+}

eco-api/src/main/java/com/willfp/eco/core/factory/RunnableFactory.java

@@ -0,0 +1,16 @@
+package com.willfp.eco.core.factory;
+
+import com.willfp.eco.core.scheduling.RunnableTask;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.function.Consumer;
+
+public interface RunnableFactory {
+    /**
+     * Create a {@link RunnableTask}.
+     *
+     * @param consumer Lambda of the code to run, where the parameter represents the instance of the runnable.
+     * @return The created {@link RunnableTask}.
+     */
+    RunnableTask create(@NotNull Consumer<RunnableTask> consumer);
+}

eco-api/src/main/java/com/willfp/eco/core/gui/menu/FillerMask.java

@@ -0,0 +1,60 @@
+package com.willfp.eco.core.gui.menu;
+
+import com.willfp.eco.core.gui.slot.Slot;
+import com.willfp.eco.core.items.builder.ItemStackBuilder;
+import com.willfp.eco.internal.gui.FillerSlot;
+import com.willfp.eco.util.ListUtils;
+import lombok.Getter;
+import org.bukkit.Material;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.List;
+
+public class FillerMask {
+    /**
+     * Mask.
+     */
+    @Getter
+    private final List<List<Slot>> mask;
+
+    /**
+     * Create a new filler mask.
+     *
+     * @param material The mask material.
+     * @param pattern  The pattern.
+     */
+    public FillerMask(@NotNull final Material material,
+                      @NotNull final String... pattern) {
+        if (material == Material.AIR) {
+            throw new IllegalArgumentException("Material cannot be air!");
+        }
+
+        mask = ListUtils.create2DList(6, 9);
+
+        ItemStack itemStack = new ItemStackBuilder(material)
+                .setDisplayName("&r")
+                .build();
+
+        int row = 0;
+
+        for (String patternRow : pattern) {
+            int column = 0;
+            if (patternRow.length() != 9) {
+                throw new IllegalArgumentException("Invalid amount of columns in pattern!");
+            }
+            for (char c : patternRow.toCharArray()) {
+                if (c == '0') {
+                    mask.get(row).set(column, null);
+                } else if (c == '1') {
+                    mask.get(row).set(column, new FillerSlot(itemStack));
+                } else {
+                    throw new IllegalArgumentException("Invalid character in pattern! (Must only be 0 and 1)");
+                }
+
+                column++;
+            }
+            row++;
+        }
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/gui/menu/Menu.java

@@ -0,0 +1,146 @@
+package com.willfp.eco.core.gui.menu;
+
+import com.willfp.eco.core.gui.slot.Slot;
+import com.willfp.eco.internal.gui.EcoMenu;
+import com.willfp.eco.internal.gui.FillerSlot;
+import com.willfp.eco.util.ListUtils;
+import com.willfp.eco.util.StringUtils;
+import org.bukkit.Material;
+import org.bukkit.entity.Player;
+import org.bukkit.event.inventory.InventoryCloseEvent;
+import org.bukkit.inventory.Inventory;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.List;
+import java.util.function.Consumer;
+
+public interface Menu {
+    /**
+     * Get the amount of rows.
+     *
+     * @return The amount of rows.
+     */
+    int getRows();
+
+    /**
+     * Get slot at given row and column.
+     *
+     * @param row    The row.
+     * @param column The column.
+     * @return The row.
+     */
+    Slot getSlot(int row,
+                 int column);
+
+    /**
+     * Get the menu title.
+     *
+     * @return The title.
+     */
+    String getTitle();
+
+    /**
+     * Open the inventory for the player.
+     *
+     * @param player The player.
+     * @return The inventory.
+     */
+    Inventory open(@NotNull Player player);
+
+    /**
+     * Create a builder with a given amount of rows.
+     *
+     * @param rows The rows.
+     * @return The builder.
+     */
+    static Builder builder(final int rows) {
+        return new Builder(rows);
+    }
+
+    class Builder {
+        /**
+         * The amount of rows.
+         */
+        private final int rows;
+
+        /**
+         * The title.
+         */
+        private String title = "Menu";
+
+        /**
+         * The mask slots.
+         */
+        private List<List<Slot>> maskSlots;
+
+        /**
+         * The slots.
+         */
+        private final List<List<Slot>> slots;
+
+        /**
+         * The close event handler.
+         */
+        private Consumer<InventoryCloseEvent> onClose = (event) -> {
+        };
+
+        Builder(final int rows) {
+            this.rows = rows;
+            this.slots = ListUtils.create2DList(rows, 9);
+            this.maskSlots = ListUtils.create2DList(rows, 9);
+        }
+
+        public Builder setTitle(@NotNull final String title) {
+            this.title = StringUtils.translate(title);
+            return this;
+        }
+
+        public Builder setSlot(final int row,
+                               final int column,
+                               @NotNull final Slot slot) {
+            if (row < 1 || row > this.rows) {
+                throw new IllegalArgumentException("Invalid row number!");
+            }
+
+            if (column < 1 || column > 9) {
+                throw new IllegalArgumentException("Invalid column number!");
+            }
+
+            slots.get(row - 1).set(column - 1, slot);
+            return this;
+        }
+
+        public Builder setMask(@NotNull final FillerMask mask) {
+            this.maskSlots = mask.getMask();
+            return this;
+        }
+
+        public Builder onClose(@NotNull final Consumer<InventoryCloseEvent> action) {
+            this.onClose = action;
+            return this;
+        }
+
+        public Menu build() {
+            List<List<Slot>> finalSlots = maskSlots;
+            for (int i = 0; i < slots.size(); i++) {
+                for (int j = 0; j < slots.get(i).size(); j++) {
+                    Slot slot = slots.get(i).get(j);
+                    if (slot != null) {
+                        finalSlots.get(i).set(j, slot);
+                    }
+                }
+            }
+
+            for (List<Slot> finalSlot : finalSlots) {
+                for (int j = 0; j < finalSlot.size(); j++) {
+                    if (finalSlot.get(j) == null) {
+                        finalSlot.set(j, new FillerSlot(new ItemStack(Material.AIR)));
+                    }
+                }
+            }
+
+            return new EcoMenu(rows, finalSlots, title, onClose);
+        }
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/gui/slot/Slot.java

@@ -0,0 +1,105 @@
+package com.willfp.eco.core.gui.slot;
+
+import com.willfp.eco.internal.gui.EcoSlot;
+import org.bukkit.entity.Player;
+import org.bukkit.event.inventory.InventoryClickEvent;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.function.BiConsumer;
+import java.util.function.Function;
+
+public interface Slot {
+    /**
+     * Get the ItemStack that would be shown to a player.
+     *
+     * @param player The player.
+     * @return The ItemStack.
+     */
+    ItemStack getItemStack(@NotNull Player player);
+
+    /**
+     * Create a builder for an ItemStack.
+     *
+     * @param itemStack The ItemStack.
+     * @return The builder.
+     */
+    static Builder builder(@NotNull final ItemStack itemStack) {
+        return new Builder((player) -> itemStack);
+    }
+
+    /**
+     * Create a builder for a player-specific ItemStack.
+     *
+     * @param provider The provider.
+     * @return The builder.
+     */
+    static Builder builder(@NotNull final Function<Player, ItemStack> provider) {
+        return new Builder(provider);
+    }
+
+    class Builder {
+        /**
+         * Provider.
+         */
+        private final Function<Player, ItemStack> provider;
+
+        /**
+         * Left click handler.
+         */
+        private BiConsumer<InventoryClickEvent, Slot> onLeftClick = null;
+
+        /**
+         * Right click handler.
+         */
+        private BiConsumer<InventoryClickEvent, Slot> onRightClick = null;
+
+        /**
+         * Shift-Left-Click handler.
+         */
+        private BiConsumer<InventoryClickEvent, Slot> onShiftLeftClick = null;
+
+        /**
+         * Shift-Right-Click handler.
+         */
+        private BiConsumer<InventoryClickEvent, Slot> onShiftRightClick = null;
+
+        /**
+         * Middle click handler.
+         */
+        private BiConsumer<InventoryClickEvent, Slot> onMiddleClick = null;
+
+        Builder(@NotNull final Function<Player, ItemStack> provider) {
+            this.provider = provider;
+        }
+
+        public Builder onLeftClick(@NotNull final BiConsumer<InventoryClickEvent, Slot> action) {
+            this.onLeftClick = action;
+            return this;
+        }
+
+        public Builder onRightClick(@NotNull final BiConsumer<InventoryClickEvent, Slot> action) {
+            this.onRightClick = action;
+            return this;
+        }
+
+        public Builder onShiftLeftClick(@NotNull final BiConsumer<InventoryClickEvent, Slot> action) {
+            this.onShiftLeftClick = action;
+            return this;
+        }
+
+        public Builder onShiftRightClick(@NotNull final BiConsumer<InventoryClickEvent, Slot> action) {
+            this.onShiftRightClick = action;
+            return this;
+        }
+
+        public Builder onMiddleClick(@NotNull final BiConsumer<InventoryClickEvent, Slot> action) {
+            this.onMiddleClick = action;
+            return this;
+        }
+
+        public Slot build() {
+            return new EcoSlot(provider, onLeftClick, onRightClick, onShiftLeftClick, onShiftRightClick, onMiddleClick);
+        }
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/integrations/Integration.java

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.integrations;
+package com.willfp.eco.core.integrations;
 
 public interface Integration {
     /**

eco-api/src/main/java/com/willfp/eco/core/integrations/IntegrationLoader.java

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.integrations;
+package com.willfp.eco.core.integrations;
 
 import lombok.Getter;
 import org.jetbrains.annotations.NotNull;

eco-api/src/main/java/com/willfp/eco/core/integrations/anticheat/AnticheatManager.java

@@ -1,6 +1,6 @@
-package com.willfp.eco.util.integrations.anticheat;
+package com.willfp.eco.core.integrations.anticheat;
 
-import com.willfp.eco.util.plugin.AbstractEcoPlugin;
+import com.willfp.eco.core.EcoPlugin;
 import lombok.experimental.UtilityClass;
 import org.bukkit.entity.Player;
 import org.bukkit.event.Listener;
@@ -11,11 +11,6 @@ import java.util.Set;
 
 @UtilityClass
 public class AnticheatManager {
-    /**
-     * The linked {@link AbstractEcoPlugin} to register anticheat listeners to.
-     */
-    private final AbstractEcoPlugin plugin = AbstractEcoPlugin.getInstance();
-
     /**
      * A set of all registered anticheats.
      */
@@ -24,9 +19,11 @@ public class AnticheatManager {
     /**
      * Register a new anticheat.
      *
+     * @param plugin    The plugin.
      * @param anticheat The anticheat to register.
      */
-    public void register(@NotNull final AnticheatWrapper anticheat) {
+    public void register(@NotNull final EcoPlugin plugin,
+                         @NotNull final AnticheatWrapper anticheat) {
         if (anticheat instanceof Listener) {
             plugin.getEventManager().registerListener((Listener) anticheat);
         }
@@ -49,8 +46,6 @@ public class AnticheatManager {
      * @param player The player to remove the exemption.
      */
     public void unexemptPlayer(@NotNull final Player player) {
-        plugin.getScheduler().runLater(() -> {
-            anticheats.forEach(anticheat -> anticheat.unexempt(player));
-        }, 1);
+        anticheats.forEach(anticheat -> anticheat.unexempt(player));
     }
 }

eco-api/src/main/java/com/willfp/eco/core/integrations/anticheat/AnticheatWrapper.java

@@ -1,6 +1,6 @@
-package com.willfp.eco.util.integrations.anticheat;
+package com.willfp.eco.core.integrations.anticheat;
 
-import com.willfp.eco.util.integrations.Integration;
+import com.willfp.eco.core.integrations.Integration;
 import org.bukkit.entity.Player;
 import org.jetbrains.annotations.NotNull;
 

eco-api/src/main/java/com/willfp/eco/core/integrations/antigrief/AntigriefManager.java

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.integrations.antigrief;
+package com.willfp.eco.core.integrations.antigrief;
 
 import lombok.experimental.UtilityClass;
 import org.bukkit.Location;

eco-api/src/main/java/com/willfp/eco/core/integrations/antigrief/AntigriefWrapper.java

@@ -1,6 +1,6 @@
-package com.willfp.eco.util.integrations.antigrief;
+package com.willfp.eco.core.integrations.antigrief;
 
-import com.willfp.eco.util.integrations.Integration;
+import com.willfp.eco.core.integrations.Integration;
 import org.bukkit.Location;
 import org.bukkit.block.Block;
 import org.bukkit.entity.LivingEntity;

eco-api/src/main/java/com/willfp/eco/core/integrations/mcmmo/McmmoManager.java

@@ -0,0 +1,52 @@
+package com.willfp.eco.core.integrations.mcmmo;
+
+import lombok.experimental.UtilityClass;
+import org.bukkit.block.Block;
+import org.bukkit.event.Event;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.HashSet;
+import java.util.Set;
+
+@UtilityClass
+public class McmmoManager {
+    /**
+     * A set of all registered integrations.
+     */
+    private final Set<McmmoWrapper> regsistered = new HashSet<>();
+
+    /**
+     * Register a new integration.
+     *
+     * @param integration The integration to register.
+     */
+    public void register(@NotNull final McmmoWrapper integration) {
+        regsistered.add(integration);
+    }
+
+    /**
+     * Get bonus drop count from block.
+     *
+     * @param block The block.
+     * @return The bonus drop count.
+     */
+    public int getBonusDropCount(@NotNull final Block block) {
+        for (McmmoWrapper mcmmoWrapper : regsistered) {
+            return mcmmoWrapper.getBonusDropCount(block);
+        }
+        return 0;
+    }
+
+    /**
+     * Get if event is fake.
+     *
+     * @param event The event to check.
+     * @return If the event is fake.
+     */
+    public boolean isFake(@NotNull final Event event) {
+        for (McmmoWrapper mcmmoWrapper : regsistered) {
+            return mcmmoWrapper.isFake(event);
+        }
+        return false;
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/integrations/mcmmo/McmmoWrapper.java

@@ -0,0 +1,23 @@
+package com.willfp.eco.core.integrations.mcmmo;
+
+import org.bukkit.block.Block;
+import org.bukkit.event.Event;
+import org.jetbrains.annotations.NotNull;
+
+public interface McmmoWrapper {
+    /**
+     * Get bonus drop count of block.
+     *
+     * @param block The block.
+     * @return The drop multiplier.
+     */
+    int getBonusDropCount(@NotNull Block block);
+
+    /**
+     * Get if event is fake.
+     *
+     * @param event The event.
+     * @return If is fake.
+     */
+    boolean isFake(@NotNull Event event);
+}

eco-api/src/main/java/com/willfp/eco/core/integrations/placeholder/PlaceholderEntry.java

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.integrations.placeholder;
+package com.willfp.eco.core.integrations.placeholder;
 
 import lombok.Getter;
 import org.apache.commons.lang.Validate;

eco-api/src/main/java/com/willfp/eco/core/integrations/placeholder/PlaceholderIntegration.java

@@ -1,6 +1,6 @@
-package com.willfp.eco.util.integrations.placeholder;
+package com.willfp.eco.core.integrations.placeholder;
 
-import com.willfp.eco.util.integrations.Integration;
+import com.willfp.eco.core.integrations.Integration;
 import org.bukkit.entity.Player;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;

eco-api/src/main/java/com/willfp/eco/core/integrations/placeholder/PlaceholderManager.java

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.integrations.placeholder;
+package com.willfp.eco.core.integrations.placeholder;
 
 import lombok.experimental.UtilityClass;
 import org.bukkit.entity.Player;
@@ -52,7 +52,7 @@ public class PlaceholderManager {
     public static String getResult(@Nullable final Player player,
                                    @NotNull final String identifier) {
         Optional<PlaceholderEntry> matching = REGISTERED_PLACEHOLDERS.stream().filter(expansion -> expansion.getIdentifier().equalsIgnoreCase(identifier)).findFirst();
-        if (!matching.isPresent()) {
+        if (matching.isEmpty()) {
             return null;
         }
         PlaceholderEntry entry = matching.get();

eco-api/src/main/java/com/willfp/eco/core/items/CustomItem.java

@@ -0,0 +1,59 @@
+package com.willfp.eco.core.items;
+
+import lombok.Getter;
+import org.bukkit.NamespacedKey;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.function.Predicate;
+
+public class CustomItem implements TestableItem {
+    /**
+     * The key.
+     */
+    @Getter
+    private final NamespacedKey key;
+
+    /**
+     * The test for ItemStacks to pass.
+     */
+    private final Predicate<ItemStack> test;
+
+    /**
+     * Example Item: what the user should see.
+     */
+    private final ItemStack item;
+
+    /**
+     * Create a new complex recipe part.
+     *
+     * @param key  The item key.
+     * @param test The test.
+     * @param item The example ItemStacks.
+     */
+    public CustomItem(@NotNull final NamespacedKey key,
+                      @NotNull final Predicate<ItemStack> test,
+                      @NotNull final ItemStack item) {
+        this.key = key;
+        this.test = test;
+        this.item = item;
+    }
+
+    @Override
+    public boolean matches(@Nullable final ItemStack itemStack) {
+        return test.test(itemStack);
+    }
+
+    @Override
+    public ItemStack getItem() {
+        return item;
+    }
+
+    /**
+     * Register the item.
+     */
+    public void register() {
+        Items.registerCustomItem(this.getKey(), this);
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/items/Items.java

@@ -0,0 +1,89 @@
+package com.willfp.eco.core.items;
+
+import com.willfp.eco.core.recipe.parts.EmptyTestableItem;
+import com.willfp.eco.core.recipe.parts.MaterialTestableItem;
+import com.willfp.eco.core.recipe.parts.TestableStack;
+import lombok.experimental.UtilityClass;
+import org.bukkit.Material;
+import org.bukkit.NamespacedKey;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.HashMap;
+import java.util.Map;
+
+@UtilityClass
+@SuppressWarnings("deprecation")
+public final class Items {
+    /**
+     * All recipe parts.
+     */
+    private static final Map<NamespacedKey, CustomItem> REGISTRY = new HashMap<>();
+
+    /**
+     * Register a new recipe part.
+     *
+     * @param key  The key of the recipe part.
+     * @param part The recipe part.
+     */
+    public void registerCustomItem(@NotNull final NamespacedKey key,
+                                   @NotNull final CustomItem part) {
+        REGISTRY.put(key, part);
+    }
+
+    /**
+     * Lookup item from string.
+     * <p>
+     * Used for recipes.
+     *
+     * @param key The string to test.
+     * @return The found testable item, or an empty item if not found.
+     */
+    public TestableItem lookup(@NotNull final String key) {
+        String[] split = key.toLowerCase().split(":");
+
+        if (split.length == 1) {
+            Material material = Material.getMaterial(key.toUpperCase());
+            if (material == null || material == Material.AIR) {
+                return new EmptyTestableItem();
+            }
+            return new MaterialTestableItem(material);
+        }
+
+        if (split.length == 2) {
+            CustomItem part = REGISTRY.get(new NamespacedKey(split[0], split[1]));
+
+            if (part == null) {
+                Material material = Material.getMaterial(split[0].toUpperCase());
+                if (material == null || material == Material.AIR) {
+                    return new EmptyTestableItem();
+                }
+                return new TestableStack(new MaterialTestableItem(material), Integer.parseInt(split[1]));
+            } else {
+                return part;
+            }
+        }
+
+        if (split.length == 3) {
+            CustomItem part = REGISTRY.get(new NamespacedKey(split[0], split[1]));
+            return part == null ? new EmptyTestableItem() : new TestableStack(part, Integer.parseInt(split[2]));
+        }
+
+        return new EmptyTestableItem();
+    }
+
+    /**
+     * Get if itemStack is a custom item.
+     *
+     * @param itemStack The itemStack to check.
+     * @return If is recipe.
+     */
+    public boolean isCustomItem(@NotNull final ItemStack itemStack) {
+        for (CustomItem item : REGISTRY.values()) {
+            if (item.matches(itemStack)) {
+                return true;
+            }
+        }
+        return false;
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/items/TestableItem.java

@@ -0,0 +1,21 @@
+package com.willfp.eco.core.items;
+
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.Nullable;
+
+public interface TestableItem {
+    /**
+     * If an ItemStack matches the recipe part.
+     *
+     * @param itemStack The item to test.
+     * @return If the item matches.
+     */
+    boolean matches(@Nullable ItemStack itemStack);
+
+    /**
+     * Get an example item.
+     *
+     * @return The item.
+     */
+    ItemStack getItem();
+}

eco-api/src/main/java/com/willfp/eco/core/items/builder/EnchantedBookBuilder.java

@@ -0,0 +1,29 @@
+package com.willfp.eco.core.items.builder;
+
+import com.willfp.eco.internal.items.AbstractItemStackBuilder;
+import org.bukkit.Material;
+import org.bukkit.enchantments.Enchantment;
+import org.bukkit.inventory.meta.EnchantmentStorageMeta;
+import org.jetbrains.annotations.NotNull;
+
+public class EnchantedBookBuilder extends AbstractItemStackBuilder<EnchantmentStorageMeta, EnchantedBookBuilder> {
+    /**
+     * Create a new EnchantedBookBuilder.
+     */
+    public EnchantedBookBuilder() {
+        super(Material.ENCHANTED_BOOK);
+    }
+
+    /**
+     * Add an enchantment to the item.
+     *
+     * @param enchantment The enchantment.
+     * @param level       The level.
+     * @return The builder.
+     */
+    public EnchantedBookBuilder addStoredEnchantment(@NotNull final Enchantment enchantment,
+                                                     final int level) {
+        this.getMeta().addStoredEnchant(enchantment, level, true);
+        return this;
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/items/builder/ItemBuilder.java

@@ -0,0 +1,181 @@
+package com.willfp.eco.core.items.builder;
+
+import org.bukkit.NamespacedKey;
+import org.bukkit.enchantments.Enchantment;
+import org.bukkit.inventory.ItemFlag;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.persistence.PersistentDataType;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.List;
+import java.util.function.Supplier;
+
+public interface ItemBuilder {
+    /**
+     * Set the ItemStack amount.
+     *
+     * @param amount The amount.
+     * @return The builder.
+     */
+    ItemBuilder setAmount(int amount);
+
+    /**
+     * Set the ItemStack amount.
+     *
+     * @param amount The amount.
+     * @return The builder.
+     */
+    ItemBuilder setAmount(@NotNull Supplier<Integer> amount);
+
+    /**
+     * Add an enchantment to the item.
+     *
+     * @param enchantment The enchantment.
+     * @param level       The level.
+     * @return The builder.r
+     */
+    ItemBuilder addEnchantment(@NotNull Enchantment enchantment,
+                     int level);
+
+    /**
+     * Add an enchantment to the item.
+     *
+     * @param enchantment The enchantment.
+     * @param level       The level.
+     * @return The builder.
+     */
+    ItemBuilder addEnchantment(@NotNull Supplier<Enchantment> enchantment,
+                     @NotNull Supplier<Integer> level);
+
+    /**
+     * Set the item display name.
+     *
+     * @param name The name.
+     * @return The builder.
+     */
+    ItemBuilder setDisplayName(@NotNull String name);
+
+    /**
+     * Set the item display name.
+     *
+     * @param name The name.
+     * @return The builder.
+     */
+    ItemBuilder setDisplayName(@NotNull Supplier<String> name);
+
+    /**
+     * Add lore line.
+     *
+     * @param line The line.
+     * @return The builder.
+     */
+    ItemBuilder addLoreLine(@NotNull String line);
+
+    /**
+     * Add lore line.
+     *
+     * @param line The line.
+     * @return The builder.
+     */
+    ItemBuilder addLoreLine(@NotNull Supplier<String> line);
+
+    /**
+     * Add lore lines.
+     *
+     * @param lines The lines.
+     * @return The builder.
+     */
+    ItemBuilder addLoreLines(@NotNull List<String> lines);
+
+    /**
+     * Add lore lines.
+     *
+     * @param lines The lines.
+     * @return The builder.
+     */
+    ItemBuilder addLoreLines(@NotNull Supplier<List<String>> lines);
+
+    /**
+     * Add ItemFlags.
+     *
+     * @param itemFlags The flags.
+     * @return The builder.
+     */
+    ItemBuilder addItemFlag(@NotNull ItemFlag... itemFlags);
+
+    /**
+     * Add ItemFlags.
+     *
+     * @param itemFlags The flags.
+     * @return The builder.
+     */
+    ItemBuilder addItemFlag(@NotNull Supplier<ItemFlag[]> itemFlags);
+
+    /**
+     * Write meta key.
+     *
+     * @param key   The key.
+     * @param type  The type.
+     * @param value The value.
+     * @param <A>   The type.
+     * @param <B>   The type.
+     * @return The builder.
+     */
+    <A, B> ItemBuilder writeMetaKey(@NotNull NamespacedKey key,
+                          @NotNull PersistentDataType<A, B> type,
+                          @NotNull B value);
+
+    /**
+     * Write meta key.
+     *
+     * @param key   The key.
+     * @param type  The type.
+     * @param value The value.
+     * @param <A>   The type.
+     * @param <B>   The type.
+     * @return The builder.
+     */
+    <A, B> ItemBuilder writeMetaKey(@NotNull Supplier<NamespacedKey> key,
+                          @NotNull Supplier<PersistentDataType<A, B>> type,
+                          @NotNull Supplier<B> value);
+
+    /**
+     * Set unbreakable.
+     *
+     * @param unbreakable If the item should be unbreakable.
+     * @return The builder.
+     */
+    ItemBuilder setUnbreakable(boolean unbreakable);
+
+    /**
+     * Set unbreakable.
+     *
+     * @param unbreakable If the item should be unbreakable.
+     * @return The builder.
+     */
+    ItemBuilder setUnbreakable(@NotNull Supplier<Boolean> unbreakable);
+
+    /**
+     * Set custom model data.
+     *
+     * @param data The data.
+     * @return The builder.
+     */
+    ItemBuilder setCustomModelData(@Nullable Integer data);
+
+    /**
+     * Set custom model data.
+     *
+     * @param data The data.
+     * @return The builder.
+     */
+    ItemBuilder setCustomModelData(@NotNull Supplier<Integer> data);
+
+    /**
+     * Build the item.
+     *
+     * @return The item.
+     */
+    ItemStack build();
+}

eco-api/src/main/java/com/willfp/eco/core/items/builder/ItemStackBuilder.java

@@ -0,0 +1,27 @@
+package com.willfp.eco.core.items.builder;
+
+import com.willfp.eco.internal.items.AbstractItemStackBuilder;
+import org.bukkit.Material;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.meta.ItemMeta;
+import org.jetbrains.annotations.NotNull;
+
+public class ItemStackBuilder extends AbstractItemStackBuilder<ItemMeta, ItemStackBuilder> {
+    /**
+     * Create a new ItemStackBuilder.
+     *
+     * @param material The material.
+     */
+    public ItemStackBuilder(@NotNull final Material material) {
+        super(material);
+    }
+
+    /**
+     * Create a new ItemStackBuilder to modify an existing item.
+     *
+     * @param base The ItemStack to start with.
+     */
+    public ItemStackBuilder(@NotNull final ItemStack base) {
+        super(base);
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/items/builder/LeatherArmorBuilder.java

@@ -0,0 +1,41 @@
+package com.willfp.eco.core.items.builder;
+
+import com.willfp.eco.internal.items.AbstractItemStackBuilder;
+import org.bukkit.Color;
+import org.bukkit.Material;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.meta.LeatherArmorMeta;
+import org.jetbrains.annotations.NotNull;
+
+public class LeatherArmorBuilder extends AbstractItemStackBuilder<LeatherArmorMeta, LeatherArmorBuilder> {
+    /**
+     * Create a new ItemStackBuilder.
+     *
+     * @param material The material.
+     */
+    public LeatherArmorBuilder(@NotNull final Material material) {
+        super(material);
+    }
+
+    /**
+     * Create a new ItemStackBuilder to modify an existing item.
+     *
+     * @param base The ItemStack to start with.
+     */
+    public LeatherArmorBuilder(@NotNull final ItemStack base) {
+        super(base);
+    }
+
+    /**
+     * Set leather color.
+     *
+     * @param color The color.
+     * @return The builder.
+     */
+    public LeatherArmorBuilder setColor(@NotNull final java.awt.Color color) {
+        Color bukkitColor = Color.fromRGB(color.getRed(), color.getGreen(), color.getBlue());
+        this.getMeta().setColor(bukkitColor);
+
+        return this;
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/items/builder/SkullBuilder.java

@@ -0,0 +1,28 @@
+package com.willfp.eco.core.items.builder;
+
+import com.willfp.eco.internal.items.AbstractItemStackBuilder;
+import com.willfp.eco.util.SkullUtils;
+import org.bukkit.Material;
+import org.bukkit.inventory.meta.SkullMeta;
+import org.jetbrains.annotations.NotNull;
+
+public class SkullBuilder extends AbstractItemStackBuilder<SkullMeta, SkullBuilder> {
+    /**
+     * Create a new EnchantedBookBuilder.
+     */
+    public SkullBuilder() {
+        super(Material.PLAYER_HEAD);
+    }
+
+    /**
+     * Set skull texture.
+     *
+     * @param texture The texture.
+     * @return The builder.
+     */
+    public SkullBuilder setSkullTexture(@NotNull final String texture) {
+        SkullUtils.setSkullTexture(this.getMeta(), texture);
+
+        return this;
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/proxy/AbstractProxy.java

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.proxy;
+package com.willfp.eco.core.proxy;
 
 public interface AbstractProxy {
 

eco-api/src/main/java/com/willfp/eco/core/proxy/ProxyConstants.java

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.proxy;
+package com.willfp.eco.core.proxy;
 
 import lombok.experimental.UtilityClass;
 import org.bukkit.Bukkit;

eco-api/src/main/java/com/willfp/eco/core/proxy/UnsupportedVersionException.java

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.proxy;
+package com.willfp.eco.core.proxy;
 
 import org.jetbrains.annotations.NotNull;
 

eco-api/src/main/java/com/willfp/eco/core/recipe/Recipes.java

@@ -0,0 +1,92 @@
+package com.willfp.eco.core.recipe;
+
+import com.google.common.collect.BiMap;
+import com.google.common.collect.HashBiMap;
+import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.core.items.Items;
+import com.willfp.eco.core.recipe.recipes.CraftingRecipe;
+import com.willfp.eco.core.recipe.recipes.ShapedCraftingRecipe;
+import lombok.experimental.UtilityClass;
+import org.bukkit.NamespacedKey;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.List;
+
+@UtilityClass
+@SuppressWarnings("deprecation")
+public class Recipes {
+    /**
+     * Registry of all recipes.
+     */
+    private static final BiMap<NamespacedKey, CraftingRecipe> RECIPES = HashBiMap.create();
+
+
+    /**
+     * Register a recipe.
+     *
+     * @param recipe The recipe.
+     */
+    public void register(@NotNull final CraftingRecipe recipe) {
+        RECIPES.forcePut(recipe.getKey(), recipe);
+    }
+
+    /**
+     * Get recipe matching matrix.
+     *
+     * @param matrix The matrix to test.
+     * @return The match, or null if not found.
+     */
+    @Nullable
+    public CraftingRecipe getMatch(@NotNull final ItemStack[] matrix) {
+        return RECIPES.values().stream().filter(recipe -> recipe.test(matrix)).findFirst().orElse(null);
+    }
+
+    /**
+     * Get recipe by key.
+     *
+     * @param key The key.
+     * @return The recipe, or null if not found.
+     */
+    @Nullable
+    public CraftingRecipe getRecipe(@NotNull final NamespacedKey key) {
+        CraftingRecipe recipe = RECIPES.get(key);
+        if (recipe != null) {
+            return recipe;
+        }
+
+        if (key.getKey().contains("_displayed")) {
+            NamespacedKey otherKey = new NamespacedKey(key.getNamespace(), key.getKey().replace("_displayed", ""));
+
+            return RECIPES.get(otherKey);
+        }
+
+        return null;
+    }
+
+    /**
+     * Create and register recipe.
+     *
+     * @param plugin        The plugin.
+     * @param key           The key.
+     * @param output        The output.
+     * @param recipeStrings The recipe.
+     * @return The recipe.
+     */
+    public CraftingRecipe createAndRegisterRecipe(@NotNull final EcoPlugin plugin,
+                                                  @NotNull final String key,
+                                                  @NotNull final ItemStack output,
+                                                  @NotNull final List<String> recipeStrings) {
+        ShapedCraftingRecipe.Builder builder = ShapedCraftingRecipe.builder(plugin, key).setOutput(output);
+
+        for (int i = 0; i < 9; i++) {
+            builder.setRecipePart(i, Items.lookup(recipeStrings.get(i)));
+        }
+
+        ShapedCraftingRecipe recipe = builder.build();
+        recipe.register();
+
+        return recipe;
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/recipe/parts/EmptyTestableItem.java

@@ -0,0 +1,31 @@
+package com.willfp.eco.core.recipe.parts;
+
+import com.willfp.eco.core.items.TestableItem;
+import org.bukkit.Material;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.Nullable;
+
+public class EmptyTestableItem implements TestableItem {
+    /**
+     * Create a new empty recipe part.
+     */
+    public EmptyTestableItem() {
+
+    }
+
+    /**
+     * If the item is empty.
+     *
+     * @param itemStack The item to test.
+     * @return If the item is empty.
+     */
+    @Override
+    public boolean matches(@Nullable final ItemStack itemStack) {
+        return itemStack == null || itemStack.getType() == Material.AIR;
+    }
+
+    @Override
+    public ItemStack getItem() {
+        return new ItemStack(Material.AIR);
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/recipe/parts/MaterialTestableItem.java

@@ -0,0 +1,41 @@
+package com.willfp.eco.core.recipe.parts;
+
+import com.willfp.eco.core.items.TestableItem;
+import lombok.Getter;
+import org.bukkit.Material;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+public class MaterialTestableItem implements TestableItem {
+    /**
+     * The material.
+     */
+    @Getter
+    private final Material material;
+
+    /**
+     * Create a new simple recipe part.
+     *
+     * @param material The material.
+     */
+    public MaterialTestableItem(@NotNull final Material material) {
+        this.material = material;
+    }
+
+    /**
+     * If the item matches the material.
+     *
+     * @param itemStack The item to test.
+     * @return If the item is of the specified material.
+     */
+    @Override
+    public boolean matches(@Nullable final ItemStack itemStack) {
+        return itemStack != null && itemStack.getType() == material;
+    }
+
+    @Override
+    public ItemStack getItem() {
+        return new ItemStack(material);
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/recipe/parts/TestableStack.java

@@ -0,0 +1,70 @@
+package com.willfp.eco.core.recipe.parts;
+
+import com.willfp.eco.core.items.TestableItem;
+import com.willfp.eco.internal.Internals;
+import lombok.Getter;
+import org.apache.commons.lang.Validate;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.meta.ItemMeta;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class TestableStack implements TestableItem {
+    /**
+     * The item.
+     */
+    private final TestableItem handle;
+
+    /**
+     * The amount.
+     */
+    @Getter
+    private final int amount;
+
+    /**
+     * Create a new testable stack.
+     *
+     * @param item   The item.
+     * @param amount The amount.
+     */
+    public TestableStack(@NotNull final TestableItem item,
+                         final int amount) {
+        Validate.isTrue(!(item instanceof TestableStack));
+
+        this.handle = item;
+        this.amount = amount;
+    }
+
+    /**
+     * If the item matches the material.
+     *
+     * @param itemStack The item to test.
+     * @return If the item is of the specified material.
+     */
+    @Override
+    public boolean matches(@Nullable final ItemStack itemStack) {
+        return itemStack != null && handle.matches(itemStack) && itemStack.getAmount() >= amount;
+    }
+
+    @Override
+    public ItemStack getItem() {
+        ItemStack temp = handle.getItem().clone();
+        ItemMeta meta = temp.getItemMeta();
+        assert meta != null;
+
+        List<String> lore = meta.hasLore() ? meta.getLore() : new ArrayList<>();
+        assert lore != null;
+        lore.add("");
+        String add = Internals.getInstance().getPlugin().getLangYml().getString("multiple-in-craft");
+        add = add.replace("%amount%", String.valueOf(amount));
+        lore.add(add);
+        meta.setLore(lore);
+        temp.setItemMeta(meta);
+        temp.setAmount(amount);
+
+        return temp;
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/recipe/recipes/CraftingRecipe.java

@@ -0,0 +1,51 @@
+package com.willfp.eco.core.recipe.recipes;
+
+import com.willfp.eco.core.items.TestableItem;
+import org.bukkit.NamespacedKey;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.List;
+
+public interface CraftingRecipe {
+    /**
+     * Test matrix against recipe.
+     *
+     * @param matrix The matrix to check.
+     * @return If the recipe matches.
+     */
+    boolean test(@NotNull ItemStack[] matrix);
+
+    /**
+     * Register the recipe.
+     */
+    void register();
+
+    /**
+     * The recipe parts.
+     *
+     * @return The parts.
+     */
+    List<TestableItem> getParts();
+
+    /**
+     * Get the recipe key.
+     *
+     * @return The key.
+     */
+    NamespacedKey getKey();
+
+    /**
+     * Get the displayed recipe key.
+     *
+     * @return The key.
+     */
+    NamespacedKey getDisplayedKey();
+
+    /**
+     * Get the recipe output.
+     *
+     * @return The output.
+     */
+    ItemStack getOutput();
+}

eco-api/src/main/java/com/willfp/eco/core/recipe/recipes/RecipePosition.java

@@ -0,0 +1,65 @@
+package com.willfp.eco.core.recipe.recipes;
+
+import lombok.Getter;
+
+public enum RecipePosition {
+    /**
+     * Top left of matrix.
+     */
+    TOP_LEFT(0),
+
+    /**
+     * Top middle of matrix.
+     */
+    TOP_MIDDLE(1),
+
+    /**
+     * Top right of matrix.
+     */
+    TOP_RIGHT(2),
+
+    /**
+     * Middle left of matrix.
+     */
+    MIDDLE_LEFT(3),
+
+    /**
+     * Middle of matrix.
+     */
+    MIDDLE(4),
+
+    /**
+     * Middle right of matrix.
+     */
+    MIDDLE_RIGHT(5),
+
+    /**
+     * Bottom left of matrix.
+     */
+    BOTTOM_LEFT(6),
+
+    /**
+     * Bottom middle of matrix.
+     */
+    BOTTOM_MIDDLE(7),
+
+    /**
+     * Bottom right of matrix.
+     */
+    BOTTOM_RIGHT(8);
+
+    /**
+     * The index within a crafting table matrix.
+     */
+    @Getter
+    private final int index;
+
+    /**
+     * Recipe position with crafting table index.
+     *
+     * @param index The index.
+     */
+    RecipePosition(final int index) {
+        this.index = index;
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/recipe/recipes/ShapedCraftingRecipe.java

@@ -0,0 +1,191 @@
+package com.willfp.eco.core.recipe.recipes;
+
+import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.core.PluginDependent;
+import com.willfp.eco.core.items.TestableItem;
+import com.willfp.eco.core.recipe.Recipes;
+import com.willfp.eco.core.recipe.parts.EmptyTestableItem;
+import lombok.Getter;
+import org.bukkit.Bukkit;
+import org.bukkit.NamespacedKey;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.RecipeChoice;
+import org.bukkit.inventory.ShapedRecipe;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public final class ShapedCraftingRecipe extends PluginDependent<EcoPlugin> implements CraftingRecipe {
+    /**
+     * Recipe parts.
+     */
+    @Getter
+    private final List<TestableItem> parts;
+
+    /**
+     * The key of the recipe.
+     */
+    @Getter
+    private final NamespacedKey key;
+
+    /**
+     * The key of the displayed recipe.
+     */
+    @Getter
+    private final NamespacedKey displayedKey;
+
+    /**
+     * The recipe's output.
+     */
+    @Getter
+    private final ItemStack output;
+
+    private ShapedCraftingRecipe(@NotNull final EcoPlugin plugin,
+                                 @NotNull final String key,
+                                 @NotNull final List<TestableItem> parts,
+                                 @NotNull final ItemStack output) {
+        super(plugin);
+
+        this.parts = parts;
+        this.key = plugin.getNamespacedKeyFactory().create(key);
+        this.displayedKey = plugin.getNamespacedKeyFactory().create(key + "_displayed");
+        this.output = output;
+    }
+
+    @Override
+    public boolean test(@NotNull final ItemStack[] matrix) {
+        boolean matches = true;
+        for (int i = 0; i < 9; i++) {
+            if (!parts.get(i).matches(matrix[i])) {
+                matches = false;
+            }
+        }
+
+        return matches;
+    }
+
+    @Override
+    public void register() {
+        Recipes.register(this);
+
+        Bukkit.getServer().removeRecipe(this.getKey());
+        Bukkit.getServer().removeRecipe(this.getDisplayedKey());
+
+        ShapedRecipe shapedRecipe = new ShapedRecipe(this.getKey(), this.getOutput());
+        shapedRecipe.shape("012", "345", "678");
+        for (int i = 0; i < 9; i++) {
+            char character = String.valueOf(i).toCharArray()[0];
+            shapedRecipe.setIngredient(character, parts.get(i).getItem().getType());
+        }
+
+        ShapedRecipe displayedRecipe = new ShapedRecipe(this.getDisplayedKey(), this.getOutput());
+        displayedRecipe.shape("012", "345", "678");
+        for (int i = 0; i < 9; i++) {
+            char character = String.valueOf(i).toCharArray()[0];
+            displayedRecipe.setIngredient(character, new RecipeChoice.ExactChoice(parts.get(i).getItem()));
+        }
+
+        Bukkit.getServer().addRecipe(shapedRecipe);
+        Bukkit.getServer().addRecipe(displayedRecipe);
+    }
+
+    /**
+     * Create a new recipe builder.
+     *
+     * @param plugin The plugin that owns the recipe.
+     * @param key    The recipe key.
+     * @return A new builder.
+     */
+    public static Builder builder(@NotNull final EcoPlugin plugin,
+                                  @NotNull final String key) {
+        return new Builder(plugin, key);
+    }
+
+    public static final class Builder {
+        /**
+         * The recipe parts.
+         */
+        private final List<TestableItem> recipeParts = new ArrayList<>(Arrays.asList(null, null, null, null, null, null, null, null, null)); // Jank
+
+        /**
+         * The output of the recipe.
+         */
+        private ItemStack output = null;
+
+        /**
+         * The key of the recipe.
+         */
+        private final String key;
+
+        /**
+         * The plugin that created the recipe.
+         */
+        private final EcoPlugin plugin;
+
+        /**
+         * Create a new recipe builder.
+         *
+         * @param plugin The plugin that owns the recipe.
+         * @param key    The recipe key.
+         */
+        private Builder(@NotNull final EcoPlugin plugin,
+                        @NotNull final String key) {
+            this.key = key;
+            this.plugin = plugin;
+        }
+
+        /**
+         * Set a recipe part.
+         *
+         * @param position The position of the recipe within a crafting matrix.
+         * @param part     The part of the recipe.
+         * @return The builder.
+         */
+        public Builder setRecipePart(@NotNull final RecipePosition position,
+                                     @NotNull final TestableItem part) {
+            recipeParts.set(position.getIndex(), part);
+            return this;
+        }
+
+        /**
+         * Set a recipe part.
+         *
+         * @param position The position of the recipe within a crafting matrix.
+         * @param part     The part of the recipe.
+         * @return The builder.
+         */
+        public Builder setRecipePart(final int position,
+                                     @NotNull final TestableItem part) {
+            recipeParts.set(position, part);
+            return this;
+        }
+
+        /**
+         * Set the output of the recipe.
+         *
+         * @param output The output.
+         * @return The builder.
+         */
+        public Builder setOutput(@NotNull final ItemStack output) {
+            this.output = output;
+            return this;
+        }
+
+        /**
+         * Build the recipe.
+         *
+         * @return The built recipe.
+         */
+        public ShapedCraftingRecipe build() {
+            for (int i = 0; i < 9; i++) {
+                if (recipeParts.get(i) == null) {
+                    recipeParts.set(i, new EmptyTestableItem());
+                }
+            }
+
+            return new ShapedCraftingRecipe(plugin, key.toLowerCase(), recipeParts, output);
+        }
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/scheduling/RunnableTask.java

@@ -0,0 +1,59 @@
+package com.willfp.eco.core.scheduling;
+
+import org.bukkit.scheduler.BukkitTask;
+import org.jetbrains.annotations.NotNull;
+
+public interface RunnableTask extends Runnable {
+    /**
+     * Run the task.
+     *
+     * @return The created {@link BukkitTask}.
+     */
+    @NotNull BukkitTask runTask();
+
+    /**
+     * Run the task asynchronously.
+     *
+     * @return The created {@link BukkitTask}
+     */
+    @NotNull BukkitTask runTaskAsynchronously();
+
+    /**
+     * Run the task after a specified number of ticks.
+     *
+     * @param delay The number of ticks to wait.
+     * @return The created {@link BukkitTask}
+     */
+    @NotNull BukkitTask runTaskLater(long delay);
+
+    /**
+     * Run the task asynchronously after a specified number of ticks.
+     *
+     * @param delay The number of ticks to wait.
+     * @return The created {@link BukkitTask}
+     */
+    @NotNull BukkitTask runTaskLaterAsynchronously(long delay);
+
+    /**
+     * Run the task repeatedly on a timer.
+     *
+     * @param delay  The delay before the task is first ran (in ticks).
+     * @param period The ticks elapsed before the task is ran again.
+     * @return The created {@link BukkitTask}
+     */
+    @NotNull BukkitTask runTaskTimer(long delay, long period);
+
+    /**
+     * Run the task repeatedly on a timer asynchronously.
+     *
+     * @param delay  The delay before the task is first ran (in ticks).
+     * @param period The ticks elapsed before the task is ran again.
+     * @return The created {@link BukkitTask}
+     */
+    @NotNull BukkitTask runTaskTimerAsynchronously(long delay, long period);
+
+    /**
+     * Cancel the task.
+     */
+    void cancel();
+}

eco-api/src/main/java/com/willfp/eco/core/scheduling/Scheduler.java

@@ -1,6 +1,6 @@
-package com.willfp.eco.util.bukkit.scheduling;
+package com.willfp.eco.core.scheduling;
 
-import com.willfp.eco.util.plugin.AbstractEcoPlugin;
+import com.willfp.eco.core.EcoPlugin;
 import org.bukkit.scheduler.BukkitTask;
 import org.jetbrains.annotations.NotNull;
 
@@ -12,7 +12,8 @@ public interface Scheduler {
      * @param ticksLater The amount of ticks to wait before execution.
      * @return The created {@link BukkitTask}.
      */
-    BukkitTask runLater(@NotNull Runnable runnable, long ticksLater);
+    BukkitTask runLater(@NotNull Runnable runnable,
+                        long ticksLater);
 
     /**
      * Run the task repeatedly on a timer.
@@ -22,7 +23,9 @@ public interface Scheduler {
      * @param repeat   The amount of ticks to wait between executions.
      * @return The created {@link BukkitTask}.
      */
-    BukkitTask runTimer(@NotNull Runnable runnable, long delay, long repeat);
+    BukkitTask runTimer(@NotNull Runnable runnable,
+                        long delay,
+                        long repeat);
 
     /**
      * Run the task repeatedly and asynchronously on a timer.
@@ -32,7 +35,9 @@ public interface Scheduler {
      * @param repeat   The amount of ticks to wait between executions.
      * @return The created {@link BukkitTask}.
      */
-    BukkitTask runAsyncTimer(@NotNull Runnable runnable, long delay, long repeat);
+    BukkitTask runAsyncTimer(@NotNull Runnable runnable,
+                             long delay,
+                             long repeat);
 
     /**
      * Run the task.
@@ -58,10 +63,12 @@ public interface Scheduler {
      * @param repeat   The amount of ticks to wait between executions.
      * @return The id of the task.
      */
-    int syncRepeating(@NotNull Runnable runnable, long delay, long repeat);
+    int syncRepeating(@NotNull Runnable runnable,
+                      long delay,
+                      long repeat);
 
     /**
-     * Cancel all running tasks from the linked {@link AbstractEcoPlugin}.
+     * Cancel all running tasks from the linked {@link EcoPlugin}.
      */
     void cancelAll();
 }

eco-api/src/main/java/com/willfp/eco/core/tuples/Pair.java

@@ -1,14 +1,12 @@
-package com.willfp.eco.util.tuplets;
+package com.willfp.eco.core.tuples;
 
 import lombok.Getter;
 import lombok.Setter;
-import lombok.ToString;
 import org.jetbrains.annotations.Nullable;
 
-@ToString
 public class Pair<A, B> {
     /**
-     * The first value in the pair.
+     * The first item in the tuple.
      */
     @Getter
     @Setter
@@ -16,7 +14,7 @@ public class Pair<A, B> {
     private A first;
 
     /**
-     * The second value in the pair.
+     * The second item in the tuple.
      */
     @Getter
     @Setter

eco-api/src/main/java/com/willfp/eco/core/tuples/Triplet.java

@@ -0,0 +1,30 @@
+package com.willfp.eco.core.tuples;
+
+import lombok.Getter;
+import lombok.Setter;
+import org.jetbrains.annotations.Nullable;
+
+public class Triplet<A, B, C> extends Pair<A, B> {
+    /**
+     * The third item in the tuple.
+     */
+    @Getter
+    @Setter
+    @Nullable
+    private C third;
+
+    /**
+     * Create a triple of values.
+     *
+     * @param first  The first item in the pair.
+     * @param second The second item in the pair.
+     * @param third  The third item in the pair.
+     */
+    public Triplet(@Nullable final A first,
+                   @Nullable final B second,
+                   @Nullable final C third) {
+        super(first, second);
+
+        this.third = third;
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/web/Paste.java

@@ -0,0 +1,100 @@
+package com.willfp.eco.core.web;
+
+import lombok.Getter;
+import org.jetbrains.annotations.NotNull;
+
+import java.io.BufferedReader;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.net.URLDecoder;
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
+
+public class Paste {
+    /**
+     * The contents.
+     */
+    @Getter
+    private final String contents;
+
+    /**
+     * Create a new paste.
+     *
+     * @param contents The contents.
+     */
+    public Paste(@NotNull final String contents) {
+        this.contents = contents;
+    }
+
+    /**
+     * Upload to hastebin and get a token.
+     *
+     * @return The token.
+     */
+    public String getHastebinToken() {
+        try {
+            String url = "https://hastebin.com/documents";
+            URL obj = new URL(url);
+            HttpURLConnection con = (HttpURLConnection) obj.openConnection();
+
+            con.setRequestMethod("POST");
+            con.setRequestProperty("Content-Type", "application/json");
+
+            con.setDoOutput(true);
+            DataOutputStream wr = new DataOutputStream(con.getOutputStream());
+            wr.writeBytes(URLEncoder.encode(contents, StandardCharsets.UTF_8));
+            wr.flush();
+            wr.close();
+
+            BufferedReader iny = new BufferedReader(
+                    new InputStreamReader(con.getInputStream()));
+            String output;
+            StringBuilder responseBuilder = new StringBuilder();
+
+            while ((output = iny.readLine()) != null) {
+                responseBuilder.append(output);
+            }
+            iny.close();
+
+            String responseString = responseBuilder.toString();
+
+            responseString = responseString.replace("{\"key\":\"", "");
+            responseString = responseString.replace("\"}", "");
+
+            return responseString;
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+        return "";
+    }
+
+    /**
+     * Get paste from hastebin.
+     *
+     * @param token The token.
+     * @return The paste.
+     */
+    public static Paste getFromHastebin(@NotNull final String token) {
+        try {
+            StringBuilder result = new StringBuilder();
+            URL url = new URL("https://hastebin.com/raw/" + token);
+            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
+            conn.setRequestMethod("GET");
+            try (var reader = new BufferedReader(
+                    new InputStreamReader(conn.getInputStream()))) {
+                for (String line; (line = reader.readLine()) != null;) {
+                    result.append(line);
+                }
+            }
+            return new Paste(URLDecoder.decode(result.toString(), StandardCharsets.UTF_8));
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+        return null;
+    }
+}

eco-api/src/main/java/com/willfp/eco/internal/Internals.java

@@ -0,0 +1,18 @@
+package com.willfp.eco.internal;
+
+import com.willfp.eco.core.EcoPlugin;
+import org.jetbrains.annotations.NotNull;
+
+public abstract class Internals {
+    private static Internals internals;
+
+    public static void setInterfacing(@NotNull final Internals internals) {
+        Internals.internals = internals;
+    }
+
+    public abstract EcoPlugin getPlugin();
+
+    public static Internals getInstance() {
+        return internals;
+    }
+}

eco-api/src/main/java/com/willfp/eco/internal/UpdateChecker.java

@@ -1,7 +1,7 @@
-package com.willfp.eco.util.updater;
+package com.willfp.eco.internal;
 
-import com.willfp.eco.util.internal.PluginDependent;
-import com.willfp.eco.util.plugin.AbstractEcoPlugin;
+import com.willfp.eco.core.PluginDependent;
+import com.willfp.eco.core.EcoPlugin;
 import org.bukkit.util.Consumer;
 import org.jetbrains.annotations.NotNull;
 
@@ -10,13 +10,13 @@ import java.io.InputStream;
 import java.net.URL;
 import java.util.Scanner;
 
-public class UpdateChecker extends PluginDependent {
+public class UpdateChecker extends PluginDependent<EcoPlugin> {
     /**
      * Create an update checker for the specified spigot resource id.
      *
      * @param plugin The plugin to check.
      */
-    public UpdateChecker(@NotNull final AbstractEcoPlugin plugin) {
+    public UpdateChecker(@NotNull final EcoPlugin plugin) {
         super(plugin);
     }
 

eco-api/src/main/java/com/willfp/eco/internal/arrows/ArrowDataListener.java

@@ -1,9 +1,8 @@
-package com.willfp.eco.util.arrows;
+package com.willfp.eco.internal.arrows;
 
-import com.willfp.eco.util.internal.PluginDependent;
-import com.willfp.eco.util.plugin.AbstractEcoPlugin;
+import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.core.PluginDependent;
 import org.bukkit.Material;
-import org.bukkit.enchantments.Enchantment;
 import org.bukkit.entity.Arrow;
 import org.bukkit.entity.LivingEntity;
 import org.bukkit.event.EventHandler;
@@ -14,16 +13,14 @@ import org.bukkit.inventory.ItemStack;
 import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 
-import java.util.Map;
-
-public class ArrowDataListener extends PluginDependent implements Listener {
+public class ArrowDataListener extends PluginDependent<EcoPlugin> implements Listener {
     /**
      * Listener to add metadata to arrows about the enchantments on the bow that shot them.
      *
-     * @param plugin The {@link AbstractEcoPlugin} that registered the listener.
+     * @param plugin The {@link EcoPlugin} that registered the listener.
      */
     @ApiStatus.Internal
-    public ArrowDataListener(@NotNull final AbstractEcoPlugin plugin) {
+    public ArrowDataListener(@NotNull final EcoPlugin plugin) {
         super(plugin);
     }
 
@@ -34,15 +31,13 @@ public class ArrowDataListener extends PluginDependent implements Listener {
      */
     @EventHandler(priority = EventPriority.LOWEST)
     public void onLaunch(final ProjectileLaunchEvent event) {
-        if (!(event.getEntity() instanceof Arrow)) {
-            return;
-        }
-        if (!(event.getEntity().getShooter() instanceof LivingEntity)) {
+        if (!(event.getEntity() instanceof Arrow arrow)) {
             return;
         }
 
-        Arrow arrow = (Arrow) event.getEntity();
-        LivingEntity entity = (LivingEntity) arrow.getShooter();
+        if (!(arrow.getShooter() instanceof LivingEntity entity)) {
+            return;
+        }
 
         if (entity.getEquipment() == null) {
             return;
@@ -54,7 +49,6 @@ public class ArrowDataListener extends PluginDependent implements Listener {
             return;
         }
 
-        Map<Enchantment, Integer> enchantments = item.getItemMeta().getEnchants();
-        arrow.setMetadata("enchantments", this.getPlugin().getMetadataValueFactory().create(enchantments));
+        arrow.setMetadata("shot-from", this.getPlugin().getMetadataValueFactory().create(item));
     }
 }

eco-api/src/main/java/com/willfp/eco/internal/commands/HandledCommand.java

@@ -0,0 +1,166 @@
+package com.willfp.eco.internal.commands;
+
+import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.core.PluginDependent;
+import com.willfp.eco.core.command.CommandBase;
+import com.willfp.eco.core.command.CommandHandler;
+import com.willfp.eco.core.command.TabCompleteHandler;
+import com.willfp.eco.internal.commands.util.CommandUtils;
+import lombok.AccessLevel;
+import lombok.Getter;
+import org.bukkit.command.CommandSender;
+import org.bukkit.util.StringUtil;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.stream.Collectors;
+
+public abstract class HandledCommand extends PluginDependent<EcoPlugin> implements CommandBase {
+    /**
+     * The name of the command.
+     */
+    @Getter
+    private final String name;
+
+    /**
+     * The permission required to execute the command.
+     * <p>
+     * Written out as a string for flexibility with subclasses.
+     */
+    @Getter
+    private final String permission;
+
+    /**
+     * Should the command only be allowed to be executed by players?
+     * <p>
+     * In other worlds, only allowed to be executed by console.
+     */
+    @Getter
+    private final boolean playersOnly;
+
+    /**
+     * All subcommands for the command.
+     */
+    @Getter(AccessLevel.PROTECTED)
+    private final List<CommandBase> subcommands;
+
+    /**
+     * Create a new command.
+     * <p>
+     * The name cannot be the same as an existing command as this will conflict.
+     *
+     * @param plugin      Instance of a plugin.
+     * @param name        The name used in execution.
+     * @param permission  The permission required to execute the command.
+     * @param playersOnly If only players should be able to execute this command.
+     */
+    protected HandledCommand(@NotNull final EcoPlugin plugin,
+                             @NotNull final String name,
+                             @NotNull final String permission,
+                             final boolean playersOnly) {
+        super(plugin);
+        this.name = name;
+        this.permission = permission;
+        this.playersOnly = playersOnly;
+        this.subcommands = new ArrayList<>();
+    }
+
+    /**
+     * Add a subcommand to the command.
+     *
+     * @param subcommand The subcommand.
+     * @return The parent command.
+     */
+    @Override
+    public final CommandBase addSubcommand(@NotNull final CommandBase subcommand) {
+        subcommands.add(subcommand);
+
+        return this;
+    }
+
+    /**
+     * Handle the command.
+     *
+     * @param sender The sender.
+     * @param args   The arguments.
+     */
+    protected final void handle(@NotNull final CommandSender sender,
+                                @NotNull final String[] args) {
+        if (!CommandUtils.canExecute(sender, this, this.getPlugin())) {
+            return;
+        }
+
+        if (args.length > 0) {
+            for (CommandBase subcommand : this.getSubcommands()) {
+                if (subcommand.getName().equalsIgnoreCase(args[0])) {
+                    if (!CommandUtils.canExecute(sender, subcommand, this.getPlugin())) {
+                        return;
+                    }
+
+                    ((HandledCommand) subcommand).handle(sender, Arrays.copyOfRange(args, 1, args.length));
+
+                    return;
+                }
+            }
+        }
+
+        this.getHandler().onExecute(sender, Arrays.asList(args));
+    }
+
+    /**
+     * Handle the tab completion.
+     *
+     * @param sender The sender.
+     * @param args   The arguments.
+     */
+    protected final List<String> handleTabCompletion(@NotNull final CommandSender sender,
+                                                     @NotNull final String[] args) {
+
+        if (!sender.hasPermission(this.getPermission())) {
+            return null;
+        }
+
+        if (args.length == 1) {
+            List<String> completions = new ArrayList<>();
+
+            StringUtil.copyPartialMatches(
+                    args[0],
+                    this.getSubcommands().stream().map(CommandBase::getName).collect(Collectors.toList()),
+                    completions
+            );
+
+            Collections.sort(completions);
+
+            if (!completions.isEmpty()) {
+                return completions;
+            }
+        }
+
+        if (args.length >= 2) {
+            HandledCommand command = null;
+
+            for (CommandBase subcommand : this.getSubcommands()) {
+                if (args[0].equalsIgnoreCase(subcommand.getName())) {
+                    command = (HandledCommand) subcommand;
+                }
+            }
+
+            if (command != null) {
+                return command.handleTabCompletion(sender, Arrays.copyOfRange(args, 1, args.length));
+            }
+        }
+
+        return this.getTabCompleter().tabComplete(sender, Arrays.asList(args));
+    }
+
+    @Override
+    public abstract CommandHandler getHandler();
+
+    @Override
+    public TabCompleteHandler getTabCompleter() {
+        return (sender, args) -> new ArrayList<>();
+    }
+}

eco-api/src/main/java/com/willfp/eco/internal/commands/util/CommandUtils.java

@@ -0,0 +1,27 @@
+package com.willfp.eco.internal.commands.util;
+
+import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.core.command.CommandBase;
+import lombok.experimental.UtilityClass;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+@UtilityClass
+public class CommandUtils {
+    public boolean canExecute(@NotNull final CommandSender sender,
+                              @NotNull final CommandBase command,
+                              @NotNull final EcoPlugin plugin) {
+        if (command.isPlayersOnly() && !(sender instanceof Player)) {
+            sender.sendMessage(plugin.getLangYml().getMessage("not-player"));
+            return false;
+        }
+
+        if (!sender.hasPermission(command.getPermission()) && sender instanceof Player) {
+            sender.sendMessage(plugin.getLangYml().getNoPermission());
+            return false;
+        }
+
+        return true;
+    }
+}

eco-api/src/main/java/com/willfp/eco/internal/config/LoadableConfig.java

@@ -0,0 +1,39 @@
+package com.willfp.eco.internal.config;
+
+import java.io.File;
+import java.io.IOException;
+
+public interface LoadableConfig {
+    /**
+     * Create the file.
+     */
+    void createFile();
+
+    /**
+     * Get resource path as relative to base directory.
+     *
+     * @return The resource path.
+     */
+    String getResourcePath();
+
+    /**
+     * Save the config.
+     *
+     * @throws IOException If error in saving.
+     */
+    void save() throws IOException;
+
+    /**
+     * Get the config file.
+     *
+     * @return The file.
+     */
+    File getConfigFile();
+
+    /**
+     * Get the config name (including extension)
+     *
+     * @return The name.
+     */
+    String getName();
+}

eco-api/src/main/java/com/willfp/eco/internal/config/json/JsonConfigSection.java

@@ -0,0 +1,16 @@
+package com.willfp.eco.internal.config.json;
+
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Map;
+
+public class JsonConfigSection extends JsonConfigWrapper {
+    /**
+     * Config section.
+     *
+     * @param values The values.
+     */
+    public JsonConfigSection(@NotNull final Map<String, Object> values) {
+        this.init(values);
+    }
+}

eco-api/src/main/java/com/willfp/eco/internal/config/json/JsonConfigWrapper.java

@@ -0,0 +1,345 @@
+package com.willfp.eco.internal.config.json;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.willfp.eco.core.config.Config;
+import com.willfp.eco.core.config.JSONConfig;
+import com.willfp.eco.util.StringUtils;
+import lombok.Getter;
+import org.apache.commons.lang.Validate;
+import org.bukkit.configuration.ConfigurationSection;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+
+@SuppressWarnings({"unchecked", "unused"})
+public abstract class JsonConfigWrapper implements JSONConfig, Cloneable {
+    /**
+     * The linked {@link ConfigurationSection} where values are physically stored.
+     */
+    @Getter
+    private final Gson handle = new GsonBuilder().setPrettyPrinting().create();
+
+    /**
+     * All stored values.
+     */
+    @Getter
+    private final Map<String, Object> values = new HashMap<>();
+
+    /**
+     * All cached values.
+     */
+    @Getter
+    private final Map<String, Object> cache = new HashMap<>();
+
+    /**
+     * Abstract config.
+     */
+    protected JsonConfigWrapper() {
+
+    }
+
+    public void init(@NotNull final Map<String, Object> values) {
+        this.values.clear();
+        this.values.putAll(values);
+    }
+
+    @Override
+    public final void clearCache() {
+        cache.clear();
+    }
+
+    @Override
+    public String toPlaintext() {
+        return this.getHandle().toJson(this.getValues());
+    }
+
+    @Override
+    public boolean has(@NotNull final String path) {
+        return getOfKnownType(path, Object.class) != null;
+    }
+
+    @Nullable
+    protected <T> T getOfKnownType(@NotNull final String path,
+                                   @NotNull final Class<T> clazz) {
+        return getOfKnownType(path, clazz, true);
+    }
+
+    @Nullable
+    protected <T> T getOfKnownType(@NotNull final String path,
+                                   @NotNull final Class<T> clazz,
+                                   final boolean isBase) {
+        String closestPath = path;
+
+        if (cache.containsKey(path) && isBase) {
+            return (T) cache.get(path);
+        }
+
+        if (path.contains(".")) {
+            String[] split = path.split("\\.");
+            closestPath = split[0];
+        }
+
+        if (values.get(closestPath) instanceof Map && !path.equals(closestPath)) {
+            JsonConfigSection section = new JsonConfigSection((Map<String, Object>) values.get(closestPath));
+            return section.getOfKnownType(path.substring(closestPath.length() + 1), clazz, false);
+        } else {
+            if (values.containsKey(closestPath)) {
+                return (T) values.get(closestPath);
+            } else {
+                return null;
+            }
+        }
+    }
+
+    @NotNull
+    @Override
+    public List<String> getKeys(final boolean deep) {
+        if (deep) {
+            return new ArrayList<>(getDeepKeys(new HashSet<>(), ""));
+        } else {
+            return new ArrayList<>(values.keySet());
+        }
+    }
+
+    protected Set<String> getDeepKeys(@NotNull final Set<String> list,
+                                      @NotNull final String root) {
+        for (String key : values.keySet()) {
+            list.add(root + key);
+
+            if (values.get(key) instanceof Map) {
+                JsonConfigSection section = new JsonConfigSection((Map<String, Object>) values.get(key));
+                list.addAll(section.getDeepKeys(list, root + key + "."));
+            }
+        }
+
+        return list;
+    }
+
+    @Override
+    @Nullable
+    public Object get(@NotNull final String path) {
+        return getOfKnownType(path, Object.class);
+    }
+
+    @Override
+    public void set(@NotNull final String path,
+                    @Nullable final Object object) {
+        setRecursively(path, object, true);
+        clearCache();
+    }
+
+    protected void setRecursively(@NotNull final String path,
+                                  @Nullable final Object object,
+                                  final boolean isBase) {
+        String closestPath = path;
+
+        if (path.contains(".")) {
+            String[] split = path.split("\\.");
+            closestPath = split[0];
+        }
+
+        if (values.get(closestPath) instanceof Map && !path.equals(closestPath)) {
+            JsonConfigSection section = new JsonConfigSection((Map<String, Object>) values.get(closestPath));
+            section.setRecursively(path.substring(closestPath.length() + 1), object, false);
+            values.put(closestPath, section.getValues());
+        } else {
+            Object obj = object;
+
+            if (object instanceof JSONConfig) {
+                obj = ((JsonConfigWrapper) object).getValues();
+            }
+
+            values.put(path, obj);
+        }
+    }
+
+    @Override
+    @NotNull
+    public Config getSubsection(@NotNull final String path) {
+        Config subsection = getSubsectionOrNull(path);
+        Validate.notNull(subsection);
+        return subsection;
+    }
+
+    @Override
+    @Nullable
+    public Config getSubsectionOrNull(@NotNull final String path) {
+        if (values.containsKey(path)) {
+            Map<String, Object> subsection = (Map<String, Object>) values.get(path);
+            return new JsonConfigSection(subsection);
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    @NotNull
+    public List<JSONConfig> getSubsections(@NotNull final String path) {
+        List<JSONConfig> subsections = getSubsectionsOrNull(path);
+        Validate.notNull(subsections);
+        return subsections;
+    }
+
+    @Override
+    @Nullable
+    public List<JSONConfig> getSubsectionsOrNull(@NotNull final String path) {
+        List<Map<String, Object>> maps = (List<Map<String, Object>>) getOfKnownType(path, Object.class);
+
+        if (maps == null) {
+            return null;
+        }
+
+        List<JSONConfig> configs = new ArrayList<>();
+
+        for (Map<String, Object> map : maps) {
+            configs.add(new JsonConfigSection(map));
+        }
+
+        return configs;
+    }
+
+    @Override
+    public int getInt(@NotNull final String path) {
+        // ew
+        return Objects.requireNonNullElse(getOfKnownType(path, Double.class), 0D).intValue();
+    }
+
+    @Override
+    @Nullable
+    public Integer getIntOrNull(@NotNull final String path) {
+        if (has(path)) {
+            return getInt(path);
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    public int getInt(@NotNull final String path,
+                      final int def) {
+        return Objects.requireNonNullElse(getOfKnownType(path, Integer.class), def);
+    }
+
+    @Override
+    @NotNull
+    public List<Integer> getInts(@NotNull final String path) {
+        return (List<Integer>) Objects.requireNonNullElse(getOfKnownType(path, Object.class), new ArrayList<>());
+    }
+
+    @Override
+    @Nullable
+    public List<Integer> getIntsOrNull(@NotNull final String path) {
+        if (has(path)) {
+            return getInts(path);
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    public boolean getBool(@NotNull final String path) {
+        return Objects.requireNonNullElse(getOfKnownType(path, Boolean.class), false);
+    }
+
+    @Override
+    @Nullable
+    public Boolean getBoolOrNull(@NotNull final String path) {
+        if (has(path)) {
+            return getBool(path);
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    @NotNull
+    public List<Boolean> getBools(@NotNull final String path) {
+        return (List<Boolean>) Objects.requireNonNullElse(getOfKnownType(path, Object.class), new ArrayList<>());
+    }
+
+    @Override
+    @Nullable
+    public List<Boolean> getBoolsOrNull(@NotNull final String path) {
+        if (has(path)) {
+            return getBools(path);
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    @NotNull
+    public String getString(@NotNull final String path) {
+        return StringUtils.translate(Objects.requireNonNullElse(getOfKnownType(path, String.class), ""));
+    }
+
+    @Override
+    @Nullable
+    public String getStringOrNull(@NotNull final String path) {
+        if (has(path)) {
+            return getString(path);
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    @NotNull
+    public List<String> getStrings(@NotNull final String path) {
+        return StringUtils.translateList((List<String>) Objects.requireNonNullElse(getOfKnownType(path, Object.class), new ArrayList<>()));
+    }
+
+    @Override
+    @Nullable
+    public List<String> getStringsOrNull(@NotNull final String path) {
+        if (has(path)) {
+            return getStrings(path);
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    public double getDouble(@NotNull final String path) {
+        return Objects.requireNonNullElse(getOfKnownType(path, Double.class), 0D);
+    }
+
+    @Override
+    @Nullable
+    public Double getDoubleOrNull(@NotNull final String path) {
+        if (has(path)) {
+            return getDouble(path);
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    @NotNull
+    public List<Double> getDoubles(@NotNull final String path) {
+        return (List<Double>) Objects.requireNonNullElse(getOfKnownType(path, Object.class), new ArrayList<>());
+    }
+
+    @Override
+    @Nullable
+    public List<Double> getDoublesOrNull(@NotNull final String path) {
+        if (has(path)) {
+            return getDoubles(path);
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    public JSONConfig clone() {
+        return new JsonConfigSection(new HashMap<>(this.getValues()));
+    }
+}

eco-api/src/main/java/com/willfp/eco/internal/config/json/LoadableJsonConfig.java

@@ -0,0 +1,155 @@
+package com.willfp.eco.internal.config.json;
+
+import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.internal.config.LoadableConfig;
+import lombok.AccessLevel;
+import lombok.Getter;
+import org.jetbrains.annotations.NotNull;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.FileReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.nio.file.Files;
+import java.nio.file.StandardOpenOption;
+import java.util.HashMap;
+
+@SuppressWarnings({"unchecked", "unused"})
+public abstract class LoadableJsonConfig extends JsonConfigWrapper implements LoadableConfig {
+    /**
+     * The physical config file, as stored on disk.
+     */
+    @Getter
+    private final File configFile;
+
+    /**
+     * Plugin handle.
+     */
+    @Getter(AccessLevel.PROTECTED)
+    private final EcoPlugin plugin;
+
+    /**
+     * The full name of the config file (eg config.json).
+     */
+    @Getter
+    private final String name;
+
+    /**
+     * The subdirectory path.
+     */
+    @Getter(AccessLevel.PROTECTED)
+    private final String subDirectoryPath;
+
+    /**
+     * The provider of the config.
+     */
+    @Getter(AccessLevel.PROTECTED)
+    private final Class<?> source;
+
+    /**
+     * Abstract config.
+     *
+     * @param configName       The name of the config
+     * @param plugin           The plugin.
+     * @param subDirectoryPath The subdirectory path.
+     * @param source           The class that owns the resource.
+     */
+    protected LoadableJsonConfig(@NotNull final String configName,
+                                 @NotNull final EcoPlugin plugin,
+                                 @NotNull final String subDirectoryPath,
+                                 @NotNull final Class<?> source) {
+        this.plugin = plugin;
+        this.name = configName + ".json";
+        this.source = source;
+        this.subDirectoryPath = subDirectoryPath;
+
+        File directory = new File(this.getPlugin().getDataFolder(), subDirectoryPath);
+        if (!directory.exists()) {
+            directory.mkdirs();
+        }
+
+        if (!new File(directory, this.name).exists()) {
+            createFile();
+        }
+
+        this.configFile = new File(directory, this.name);
+
+        try {
+            init(this.configFile);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+        plugin.getConfigHandler().addConfig(this);
+    }
+
+    @Override
+    public void createFile() {
+        String resourcePath = getResourcePath();
+        InputStream in = source.getResourceAsStream(resourcePath);
+
+        File outFile = new File(this.getPlugin().getDataFolder(), resourcePath);
+        int lastIndex = resourcePath.lastIndexOf('/');
+        File outDir = new File(this.getPlugin().getDataFolder(), resourcePath.substring(0, Math.max(lastIndex, 0)));
+
+        if (!outDir.exists()) {
+            outDir.mkdirs();
+        }
+
+        try {
+            if (!outFile.exists()) {
+                OutputStream out = new FileOutputStream(outFile);
+                byte[] buf = new byte[1024];
+                int len;
+                while ((len = in.read(buf)) > 0) {
+                    out.write(buf, 0, len);
+                }
+                out.close();
+                in.close();
+            }
+        } catch (IOException ignored) {
+        }
+    }
+
+    /**
+     * Get resource path as relative to base directory.
+     *
+     * @return The resource path.
+     */
+    @Override
+    public String getResourcePath() {
+        String resourcePath;
+
+        if (subDirectoryPath.isEmpty()) {
+            resourcePath = name;
+        } else {
+            resourcePath = subDirectoryPath + name;
+        }
+
+        return "/" + resourcePath;
+    }
+
+    /**
+     * Save the config.
+     *
+     * @throws IOException If error in saving.
+     */
+    @Override
+    public void save() throws IOException {
+        configFile.delete();
+        Files.write(configFile.toPath(), this.toPlaintext().getBytes(), StandardOpenOption.CREATE, StandardOpenOption.WRITE);
+    }
+
+    /**
+     * Initialize the config.
+     *
+     * @param file The config file.
+     * @throws FileNotFoundException If the file doesn't exist.
+     */
+    public void init(@NotNull final File file) throws FileNotFoundException {
+        super.init(this.getHandle().fromJson(new FileReader(file), HashMap.class));
+    }
+}

eco-api/src/main/java/com/willfp/eco/internal/config/updating/EcoConfigHandler.java

@@ -0,0 +1,108 @@
+package com.willfp.eco.internal.config.updating;
+
+import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.core.PluginDependent;
+import com.willfp.eco.core.config.ConfigHandler;
+import com.willfp.eco.core.config.ConfigUpdater;
+import com.willfp.eco.internal.config.LoadableConfig;
+import com.willfp.eco.internal.config.updating.exceptions.InvalidUpdatableClassException;
+import com.willfp.eco.internal.config.updating.exceptions.InvalidUpdateMethodException;
+import com.willfp.eco.internal.config.yaml.UpdatableYamlConfig;
+import org.jetbrains.annotations.NotNull;
+
+import java.io.IOException;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+public class EcoConfigHandler extends PluginDependent<EcoPlugin> implements ConfigHandler {
+    /**
+     * A set of all configs that can be saved.
+     */
+    private final List<LoadableConfig> configs = new ArrayList<>();
+
+    /**
+     * A set of all classes that can be updated.
+     */
+    private final Set<Class<?>> updatableClasses = new HashSet<>();
+
+    /**
+     * Creates a new config handler and links it to an {@link EcoPlugin}.
+     *
+     * @param plugin The plugin to manage.
+     */
+    public EcoConfigHandler(@NotNull final EcoPlugin plugin) {
+        super(plugin);
+    }
+
+    @Override
+    public void callUpdate() {
+        updatableClasses.forEach(clazz -> Arrays.stream(clazz.getDeclaredMethods()).forEach(method -> {
+            if (method.isAnnotationPresent(ConfigUpdater.class)) {
+                if (!Modifier.isStatic(method.getModifiers())) {
+                    throw new InvalidUpdateMethodException("Update method must be static.");
+                }
+
+                try {
+                    if (method.getParameterCount() == 0) {
+                        method.invoke(null);
+                    } else if (method.getParameterCount() == 1) {
+                        method.invoke(null, this.getPlugin());
+                    } else {
+                        throw new InvalidUpdateMethodException("Update method must have 0 parameters or a plugin parameter.");
+                    }
+                } catch (IllegalAccessException | InvocationTargetException e) {
+                    e.printStackTrace();
+                    throw new InvalidUpdateMethodException("Update method generated an exception.");
+                }
+            }
+        }));
+    }
+
+    @Override
+    public void registerUpdatableClass(@NotNull final Class<?> updatableClass) {
+        boolean isValid = false;
+        for (Method method : updatableClass.getDeclaredMethods()) {
+            if (Modifier.isStatic(method.getModifiers()) && (method.getParameterCount() == 0 || method.getParameterCount() == 1) && method.isAnnotationPresent(ConfigUpdater.class)) {
+                isValid = true;
+                break;
+            }
+        }
+
+        if (!isValid) {
+            throw new InvalidUpdatableClassException("Registered updatable class " + updatableClass + " must have an annotated static method with no modifiers.");
+        }
+
+        updatableClasses.add(updatableClass);
+    }
+
+    @Override
+    public void saveAllConfigs() {
+        try {
+            for (LoadableConfig config : configs) {
+                config.save();
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public void addConfig(@NotNull final LoadableConfig config) {
+        configs.add(config);
+    }
+
+    @Override
+    public void updateConfigs() {
+        for (LoadableConfig config : configs) {
+            if (config instanceof UpdatableYamlConfig updatableYamlConfig) {
+                updatableYamlConfig.update();
+            }
+        }
+    }
+}

eco-api/src/main/java/com/willfp/eco/internal/config/updating/exceptions/InvalidUpdatableClassException.java

@@ -1,11 +1,11 @@
-package com.willfp.eco.util.config.updating.exceptions;
+package com.willfp.eco.internal.config.updating.exceptions;
 
-import com.willfp.eco.util.config.updating.ConfigHandler;
+import com.willfp.eco.internal.config.updating.EcoConfigHandler;
 import org.jetbrains.annotations.NotNull;
 
 public class InvalidUpdatableClassException extends RuntimeException {
     /**
-     * Called when an updatable class is registered into an {@link ConfigHandler}.
+     * Called when an updatable class is registered into an {@link EcoConfigHandler}.
      *
      * @param message The error message.
      */

eco-api/src/main/java/com/willfp/eco/internal/config/updating/exceptions/InvalidUpdateMethodException.java

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.config.updating.exceptions;
+package com.willfp.eco.internal.config.updating.exceptions;
 
 import org.jetbrains.annotations.NotNull;
 

eco-api/src/main/java/com/willfp/eco/internal/config/yaml/LoadableYamlConfig.java

@@ -0,0 +1,124 @@
+package com.willfp.eco.internal.config.yaml;
+
+import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.internal.config.LoadableConfig;
+import lombok.AccessLevel;
+import lombok.Getter;
+import org.bukkit.configuration.file.YamlConfiguration;
+import org.jetbrains.annotations.NotNull;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+public abstract class LoadableYamlConfig extends YamlConfigWrapper<YamlConfiguration> implements LoadableConfig {
+    /**
+     * The physical config file, as stored on disk.
+     */
+    @Getter
+    private final File configFile;
+
+    /**
+     * Plugin handle.
+     */
+    @Getter(AccessLevel.PROTECTED)
+    private final EcoPlugin plugin;
+
+    /**
+     * The full name of the config file (eg config.yml).
+     */
+    @Getter
+    private final String name;
+
+    /**
+     * The subdirectory path.
+     */
+    @Getter(AccessLevel.PROTECTED)
+    private final String subDirectoryPath;
+
+    /**
+     * The provider of the config.
+     */
+    @Getter(AccessLevel.PROTECTED)
+    private final Class<?> source;
+
+    /**
+     * Abstract config.
+     *
+     * @param configName       The name of the config
+     * @param plugin           The plugin.
+     * @param subDirectoryPath The subdirectory path.
+     * @param source           The class that owns the resource.
+     */
+    protected LoadableYamlConfig(@NotNull final String configName,
+                                 @NotNull final EcoPlugin plugin,
+                                 @NotNull final String subDirectoryPath,
+                                 @NotNull final Class<?> source) {
+        this.plugin = plugin;
+        this.name = configName + ".yml";
+        this.source = source;
+        this.subDirectoryPath = subDirectoryPath;
+
+        File directory = new File(this.getPlugin().getDataFolder(), subDirectoryPath);
+        if (!directory.exists()) {
+            directory.mkdirs();
+        }
+
+        if (!new File(directory, this.name).exists()) {
+            createFile();
+        }
+
+        this.configFile = new File(directory, this.name);
+        init(YamlConfiguration.loadConfiguration(configFile));
+    }
+
+    @Override
+    public void createFile() {
+        String resourcePath = getResourcePath();
+        InputStream in = source.getResourceAsStream(resourcePath);
+
+        File outFile = new File(this.getPlugin().getDataFolder(), resourcePath);
+        int lastIndex = resourcePath.lastIndexOf('/');
+        File outDir = new File(this.getPlugin().getDataFolder(), resourcePath.substring(0, Math.max(lastIndex, 0)));
+
+        if (!outDir.exists()) {
+            outDir.mkdirs();
+        }
+
+        try {
+            if (!outFile.exists()) {
+                OutputStream out = new FileOutputStream(outFile);
+                byte[] buf = new byte[1024];
+                int len;
+                while ((len = in.read(buf)) > 0) {
+                    out.write(buf, 0, len);
+                }
+                out.close();
+                in.close();
+            }
+        } catch (IOException ignored) {
+        }
+
+        plugin.getConfigHandler().addConfig(this);
+    }
+
+    @Override
+    public String getResourcePath() {
+        String resourcePath;
+
+        if (subDirectoryPath.isEmpty()) {
+            resourcePath = name;
+        } else {
+            resourcePath = subDirectoryPath + name;
+        }
+
+        return "/" + resourcePath;
+    }
+
+    @Override
+    public void save() throws IOException {
+        this.getHandle().save(this.getConfigFile());
+    }
+}

eco-api/src/main/java/com/willfp/eco/internal/config/yaml/UpdatableYamlConfig.java

@@ -0,0 +1,110 @@
+package com.willfp.eco.internal.config.yaml;
+
+import com.willfp.eco.core.EcoPlugin;
+import org.bukkit.configuration.InvalidConfigurationException;
+import org.bukkit.configuration.file.YamlConfiguration;
+import org.jetbrains.annotations.NotNull;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public abstract class UpdatableYamlConfig extends LoadableYamlConfig {
+    /**
+     * Whether keys not in the base config should be removed on update.
+     */
+    private final boolean removeUnused;
+
+    /**
+     * List of blacklisted update keys.
+     */
+    private final List<String> updateBlacklist;
+
+    /**
+     * Updatable config.
+     *
+     * @param configName       The name of the config
+     * @param plugin           The plugin.
+     * @param subDirectoryPath The subdirectory path.
+     * @param source           The class that owns the resource.
+     * @param removeUnused     Whether keys not present in the default config should be removed on update.
+     * @param updateBlacklist  Substring of keys to not add/remove keys for.
+     */
+    protected UpdatableYamlConfig(@NotNull final String configName,
+                                  @NotNull final EcoPlugin plugin,
+                                  @NotNull final String subDirectoryPath,
+                                  @NotNull final Class<?> source,
+                                  final boolean removeUnused,
+                                  @NotNull final String... updateBlacklist) {
+        super(configName, plugin, subDirectoryPath, source);
+        this.removeUnused = removeUnused;
+        this.updateBlacklist = new ArrayList<>(Arrays.asList(updateBlacklist));
+        this.updateBlacklist.removeIf(String::isEmpty);
+
+        update();
+    }
+
+    /**
+     * Update the config.
+     * <p>
+     * Writes missing values, however removes comments due to how configs are stored internally in bukkit.
+     */
+    public void update() {
+        super.clearCache();
+        try {
+            this.getHandle().load(this.getConfigFile());
+
+            YamlConfiguration newConfig = this.getConfigInJar();
+
+            if (newConfig.getKeys(true).equals(this.getHandle().getKeys(true))) {
+                return;
+            }
+
+            newConfig.getKeys(true).forEach((s -> {
+                if (!this.getHandle().getKeys(true).contains(s)) {
+                    if (updateBlacklist.stream().noneMatch(s::contains)) {
+                        this.getHandle().set(s, newConfig.get(s));
+                    }
+                }
+            }));
+
+            if (this.removeUnused) {
+                this.getHandle().getKeys(true).forEach((s -> {
+                    if (!newConfig.getKeys(true).contains(s)) {
+                        if (updateBlacklist.stream().noneMatch(s::contains)) {
+                            this.getHandle().set(s, null);
+                        }
+                    }
+                }));
+            }
+
+            this.getHandle().save(this.getConfigFile());
+        } catch (IOException | InvalidConfigurationException e) {
+            e.printStackTrace();
+        }
+    }
+
+    public YamlConfiguration getConfigInJar() {
+        InputStream newIn = this.getSource().getResourceAsStream(getResourcePath());
+
+        if (newIn == null) {
+            throw new NullPointerException(this.getName() + " is null?");
+        }
+
+        BufferedReader reader = new BufferedReader(new InputStreamReader(newIn, StandardCharsets.UTF_8));
+        YamlConfiguration newConfig = new YamlConfiguration();
+
+        try {
+            newConfig.load(reader);
+        } catch (IOException | InvalidConfigurationException e) {
+            e.printStackTrace();
+        }
+
+        return newConfig;
+    }
+}

eco-api/src/main/java/com/willfp/eco/internal/config/yaml/YamlConfigSection.java

@@ -0,0 +1,15 @@
+package com.willfp.eco.internal.config.yaml;
+
+import org.bukkit.configuration.ConfigurationSection;
+import org.jetbrains.annotations.NotNull;
+
+public class YamlConfigSection extends YamlConfigWrapper<ConfigurationSection> {
+    /**
+     * Config section.
+     *
+     * @param section The section.
+     */
+    public YamlConfigSection(@NotNull final ConfigurationSection section) {
+        this.init(section);
+    }
+}

eco-api/src/main/java/com/willfp/eco/internal/config/yaml/YamlConfigWrapper.java

@@ -0,0 +1,280 @@
+package com.willfp.eco.internal.config.yaml;
+
+import com.willfp.eco.core.config.Config;
+import com.willfp.eco.util.StringUtils;
+import lombok.Getter;
+import org.apache.commons.lang.Validate;
+import org.bukkit.configuration.ConfigurationSection;
+import org.bukkit.configuration.file.YamlConfiguration;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+
+@SuppressWarnings({"unchecked", "unused"})
+public abstract class YamlConfigWrapper<T extends ConfigurationSection> implements Config {
+    /**
+     * The linked {@link ConfigurationSection} where values are physically stored.
+     */
+    @Getter
+    private T handle = null;
+
+    /**
+     * Cached values for faster reading.
+     */
+    private final Map<String, Object> cache = new HashMap<>();
+
+    /**
+     * Abstract config.
+     */
+    protected YamlConfigWrapper() {
+
+    }
+
+    protected Config init(@NotNull final T config) {
+        this.handle = config;
+        return this;
+    }
+
+    @Override
+    public String toPlaintext() {
+        YamlConfiguration temp = new YamlConfiguration();
+        for (String key : handle.getKeys(true)) {
+            temp.set(key, handle.get(key));
+        }
+        return temp.saveToString();
+    }
+
+    @Override
+    public final void clearCache() {
+        cache.clear();
+    }
+
+    @Override
+    public boolean has(@NotNull final String path) {
+        return handle.contains(path);
+    }
+
+    @NotNull
+    @Override
+    public List<String> getKeys(final boolean deep) {
+        return new ArrayList<>(handle.getKeys(deep));
+    }
+
+    @Override
+    @Nullable
+    public Object get(@NotNull final String path) {
+        return handle.get(path);
+    }
+
+    @Override
+    public void set(@NotNull final String path,
+                    @Nullable final Object object) {
+        cache.remove(path);
+        handle.set(path, object);
+    }
+
+    @Override
+    @NotNull
+    public Config getSubsection(@NotNull final String path) {
+        Config subsection = getSubsectionOrNull(path);
+        Validate.notNull(subsection);
+        return subsection;
+    }
+
+    @Override
+    @Nullable
+    public Config getSubsectionOrNull(@NotNull final String path) {
+        if (cache.containsKey(path)) {
+            return (Config) cache.get(path);
+        } else {
+            ConfigurationSection raw = handle.getConfigurationSection(path);
+            if (raw == null) {
+                cache.put(path, null);
+            } else {
+                cache.put(path, new YamlConfigSection(raw));
+            }
+            return getSubsectionOrNull(path);
+        }
+    }
+
+    @Override
+    public int getInt(@NotNull final String path) {
+        if (cache.containsKey(path)) {
+            return (int) cache.get(path);
+        } else {
+            cache.put(path, handle.getInt(path, 0));
+            return getInt(path);
+        }
+    }
+
+    @Override
+    @Nullable
+    public Integer getIntOrNull(@NotNull final String path) {
+        if (has(path)) {
+            return getInt(path);
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    public int getInt(@NotNull final String path,
+                      final int def) {
+        if (cache.containsKey(path)) {
+            return (int) cache.get(path);
+        } else {
+            cache.put(path, handle.getInt(path, def));
+            return getInt(path);
+        }
+    }
+
+    @Override
+    @NotNull
+    public List<Integer> getInts(@NotNull final String path) {
+        if (cache.containsKey(path)) {
+            return (List<Integer>) cache.get(path);
+        } else {
+            cache.put(path, has(path) ? new ArrayList<>(handle.getIntegerList(path)) : new ArrayList<>());
+            return getInts(path);
+        }
+    }
+
+    @Override
+    @Nullable
+    public List<Integer> getIntsOrNull(@NotNull final String path) {
+        if (has(path)) {
+            return getInts(path);
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    public boolean getBool(@NotNull final String path) {
+        if (cache.containsKey(path)) {
+            return (boolean) cache.get(path);
+        } else {
+            cache.put(path, handle.getBoolean(path));
+            return getBool(path);
+        }
+    }
+
+    @Override
+    @Nullable
+    public Boolean getBoolOrNull(@NotNull final String path) {
+        if (has(path)) {
+            return getBool(path);
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    @NotNull
+    public List<Boolean> getBools(@NotNull final String path) {
+        if (cache.containsKey(path)) {
+            return (List<Boolean>) cache.get(path);
+        } else {
+            cache.put(path, has(path) ? new ArrayList<>(handle.getBooleanList(path)) : new ArrayList<>());
+            return getBools(path);
+        }
+    }
+
+    @Override
+    @Nullable
+    public List<Boolean> getBoolsOrNull(@NotNull final String path) {
+        if (has(path)) {
+            return getBools(path);
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    @NotNull
+    public String getString(@NotNull final String path) {
+        if (cache.containsKey(path)) {
+            return (String) cache.get(path);
+        } else {
+            cache.put(path, StringUtils.translate(Objects.requireNonNull(handle.getString(path, ""))));
+            return getString(path);
+        }
+    }
+
+    @Override
+    @Nullable
+    public String getStringOrNull(@NotNull final String path) {
+        if (has(path)) {
+            return getString(path);
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    @NotNull
+    public List<String> getStrings(@NotNull final String path) {
+        if (cache.containsKey(path)) {
+            return StringUtils.translateList((List<String>) cache.get(path));
+        } else {
+            cache.put(path, has(path) ? new ArrayList<>(handle.getStringList(path)) : new ArrayList<>());
+            return getStrings(path);
+        }
+    }
+
+    @Override
+    @Nullable
+    public List<String> getStringsOrNull(@NotNull final String path) {
+        if (has(path)) {
+            return getStrings(path);
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    public double getDouble(@NotNull final String path) {
+        if (cache.containsKey(path)) {
+            return (double) cache.get(path);
+        } else {
+            cache.put(path, handle.getDouble(path));
+            return getDouble(path);
+        }
+    }
+
+    @Override
+    @Nullable
+    public Double getDoubleOrNull(@NotNull final String path) {
+        if (has(path)) {
+            return getDouble(path);
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    @NotNull
+    public List<Double> getDoubles(@NotNull final String path) {
+        if (cache.containsKey(path)) {
+            return (List<Double>) cache.get(path);
+        } else {
+            cache.put(path, has(path) ? new ArrayList<>(handle.getDoubleList(path)) : new ArrayList<>());
+            return getDoubles(path);
+        }
+    }
+
+    @Override
+    @Nullable
+    public List<Double> getDoublesOrNull(@NotNull final String path) {
+        if (has(path)) {
+            return getDoubles(path);
+        } else {
+            return null;
+        }
+    }
+}

eco-api/src/main/java/com/willfp/eco/internal/drops/AbstractDropQueue.java

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.drops.internal;
+package com.willfp.eco.internal.drops;
 
 import org.bukkit.Location;
 import org.bukkit.inventory.ItemStack;

eco-api/src/main/java/com/willfp/eco/internal/drops/DropManager.java

@@ -0,0 +1,25 @@
+package com.willfp.eco.internal.drops;
+
+import lombok.Getter;
+import lombok.experimental.UtilityClass;
+import org.jetbrains.annotations.NotNull;
+
+@UtilityClass
+public final class DropManager {
+    /**
+     * The currently used type, or implementation, of {@link AbstractDropQueue}.
+     * <p>
+     * Default is {@link DropQueueType#COLLATED}, however this can be changed.
+     */
+    @Getter
+    private DropQueueType type = DropQueueType.COLLATED;
+
+    /**
+     * Sets the type of Drop Queue to be used.
+     *
+     * @param type The type.
+     */
+    public static void setType(@NotNull final DropQueueType type) {
+        DropManager.type = type;
+    }
+}

eco-api/src/main/java/com/willfp/eco/internal/drops/DropQueueType.java

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.drops.internal;
+package com.willfp.eco.internal.drops;
 
 public enum DropQueueType {
     /**

eco-api/src/main/java/com/willfp/eco/internal/drops/impl/FastCollatedDropQueue.java

@@ -1,7 +1,6 @@
-package com.willfp.eco.util.drops.internal;
+package com.willfp.eco.internal.drops.impl;
 
-import com.willfp.eco.util.internal.PluginDependent;
-import com.willfp.eco.util.plugin.AbstractEcoPlugin;
+import com.willfp.eco.internal.drops.AbstractDropQueue;
 import lombok.Getter;
 import lombok.Setter;
 import lombok.ToString;
@@ -9,14 +8,11 @@ import lombok.experimental.Accessors;
 import org.bukkit.Location;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;
-import org.bukkit.scheduler.BukkitTask;
-import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 
-import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
-
+import java.util.concurrent.ConcurrentHashMap;
 
 public class FastCollatedDropQueue extends InternalDropQueue {
     /**
@@ -24,7 +20,7 @@ public class FastCollatedDropQueue extends InternalDropQueue {
      * <p>
      * Cleared and updated every tick.
      */
-    private static final HashMap<Player, CollatedDrops> COLLATED_MAP = new HashMap<>();
+    public static final Map<Player, CollatedDrops> COLLATED_MAP = new ConcurrentHashMap<>();
 
     /**
      * Backend implementation of {@link AbstractDropQueue}
@@ -39,7 +35,7 @@ public class FastCollatedDropQueue extends InternalDropQueue {
     }
 
     /**
-     * Queues the drops to be managed by the {@link CollatedRunnable}.
+     * Queues the drops to be managed by the runnable.
      */
     @Override
     public void push() {
@@ -52,7 +48,7 @@ public class FastCollatedDropQueue extends InternalDropQueue {
      * The items, location, and xp linked to a player's drops.
      */
     @ToString
-    private static final class CollatedDrops {
+    public static final class CollatedDrops {
         /**
          * A collection of all ItemStacks to be dropped at the end of the tick.
          */
@@ -103,32 +99,4 @@ public class FastCollatedDropQueue extends InternalDropQueue {
             return this;
         }
     }
-
-    public static class CollatedRunnable extends PluginDependent {
-        /**
-         * The {@link BukkitTask} that the runnable represents.
-         */
-        @Getter
-        private final BukkitTask runnableTask;
-
-        /**
-         * Create and run a new runnable to process collated drops.
-         *
-         * @param plugin The {@link AbstractEcoPlugin} that manages the processing.
-         */
-        @ApiStatus.Internal
-        public CollatedRunnable(@NotNull final AbstractEcoPlugin plugin) {
-            super(plugin);
-            runnableTask = plugin.getScheduler().runTimer(() -> {
-                for (Map.Entry<Player, CollatedDrops> entry : COLLATED_MAP.entrySet()) {
-                    new InternalDropQueue(entry.getKey())
-                            .setLocation(entry.getValue().getLocation())
-                            .addItems(entry.getValue().getDrops())
-                            .addXP(entry.getValue().getXp())
-                            .push();
-                }
-                COLLATED_MAP.clear();
-            }, 0, 1);
-        }
-    }
 }