Paper/patches/server/0009-Adventure.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Riley Park <riley.park@meino.net>
Date: Fri, 29 Jan 2021 17:54:03 +0100
Subject: [PATCH] Adventure

Co-authored-by: zml <zml@stellardrift.ca>
Co-authored-by: Jake Potrebic <jake.m.potrebic@gmail.com>

diff --git a/src/main/java/io/papermc/paper/adventure/AdventureComponent.java b/src/main/java/io/papermc/paper/adventure/AdventureComponent.java
new file mode 100644
index 0000000000000000000000000000000000000000..07cd02c6f9df00844b808218be2afd793c24b69a
--- /dev/null
+++ b/src/main/java/io/papermc/paper/adventure/AdventureComponent.java
@@ -0,0 +1,86 @@
+package io.papermc.paper.adventure;
+
+import com.google.gson.JsonElement;
+import com.google.gson.JsonSerializationContext;
+import com.google.gson.JsonSerializer;
+import java.lang.reflect.Type;
+import java.util.List;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.TextComponent;
+import net.kyori.adventure.text.serializer.gson.GsonComponentSerializer;
+import net.kyori.adventure.text.serializer.plain.PlainTextComponentSerializer;
+import net.minecraft.network.chat.ComponentContents;
+import net.minecraft.network.chat.MutableComponent;
+import net.minecraft.network.chat.Style;
+import net.minecraft.network.chat.contents.LiteralContents;
+import net.minecraft.util.FormattedCharSequence;
+import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
+import org.jetbrains.annotations.Nullable;
+
+public final class AdventureComponent implements net.minecraft.network.chat.Component {
+    final Component adventure;
+    private net.minecraft.network.chat.@MonotonicNonNull Component vanilla;
+
+    public AdventureComponent(final Component adventure) {
+        this.adventure = adventure;
+    }
+
+    public net.minecraft.network.chat.Component deepConverted() {
+        net.minecraft.network.chat.Component vanilla = this.vanilla;
+        if (vanilla == null) {
+            vanilla = PaperAdventure.WRAPPER_AWARE_SERIALIZER.serialize(this.adventure);
+            this.vanilla = vanilla;
+        }
+        return vanilla;
+    }
+
+    public net.minecraft.network.chat.@Nullable Component deepConvertedIfPresent() {
+        return this.vanilla;
+    }
+
+    @Override
+    public Style getStyle() {
+        return this.deepConverted().getStyle();
+    }
+
+    @Override
+    public ComponentContents getContents() {
+        if (this.adventure instanceof TextComponent) {
+            return new LiteralContents(((TextComponent) this.adventure).content());
+        } else {
+            return this.deepConverted().getContents();
+        }
+    }
+
+    @Override
+    public String getString() {
+        return PlainTextComponentSerializer.plainText().serialize(this.adventure);
+    }
+
+    @Override
+    public List<net.minecraft.network.chat.Component> getSiblings() {
+        return this.deepConverted().getSiblings();
+    }
+
+    @Override
+    public MutableComponent plainCopy() {
+        return this.deepConverted().plainCopy();
+    }
+
+    @Override
+    public MutableComponent copy() {
+        return this.deepConverted().copy();
+    }
+
+    @Override
+    public FormattedCharSequence getVisualOrderText() {
+        return this.deepConverted().getVisualOrderText();
+    }
+
+    public static class Serializer implements JsonSerializer<AdventureComponent> {
+        @Override
+        public JsonElement serialize(final AdventureComponent src, final Type type, final JsonSerializationContext context) {
+            return GsonComponentSerializer.gson().serializer().toJsonTree(src.adventure, Component.class);
+        }
+    }
+}
diff --git a/src/main/java/io/papermc/paper/adventure/ChatDecorationProcessor.java b/src/main/java/io/papermc/paper/adventure/ChatDecorationProcessor.java
new file mode 100644
index 0000000000000000000000000000000000000000..87e791801b624859477025df49824637eb347dec
--- /dev/null
+++ b/src/main/java/io/papermc/paper/adventure/ChatDecorationProcessor.java
@@ -0,0 +1,141 @@
+package io.papermc.paper.adventure;
+
+import io.papermc.paper.event.player.AsyncChatCommandDecorateEvent;
+import io.papermc.paper.event.player.AsyncChatDecorateEvent;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.CompletableFuture;
+import java.util.regex.Pattern;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.minimessage.MiniMessage;
+import net.kyori.adventure.text.minimessage.tag.resolver.Placeholder;
+import net.kyori.adventure.text.minimessage.tag.resolver.TagResolver;
+import net.minecraft.Util;
+import net.minecraft.commands.CommandSourceStack;
+import net.minecraft.network.chat.ChatDecorator;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.level.ServerPlayer;
+import org.bukkit.craftbukkit.entity.CraftPlayer;
+import org.bukkit.craftbukkit.util.LazyPlayerSet;
+import org.bukkit.event.Event;
+import org.bukkit.event.player.AsyncPlayerChatPreviewEvent;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.checker.nullness.qual.Nullable;
+import org.checkerframework.framework.qual.DefaultQualifier;
+
+import static io.papermc.paper.adventure.ChatProcessor.DEFAULT_LEGACY_FORMAT;
+import static io.papermc.paper.adventure.ChatProcessor.canYouHearMe;
+import static io.papermc.paper.adventure.ChatProcessor.displayName;
+import static net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection;
+
+@DefaultQualifier(NonNull.class)
+public final class ChatDecorationProcessor {
+
+    private static final String DISPLAY_NAME_TAG = "---paper_dn---";
+    private static final Pattern DISPLAY_NAME_PATTERN = Pattern.compile("%(1\\$)?s");
+    private static final String CONTENT_TAG = "---paper_content---";
+    private static final Pattern CONTENT_PATTERN = Pattern.compile("%(2\\$)?s");
+
+    final MinecraftServer server;
+    final @Nullable ServerPlayer player;
+    final @Nullable CommandSourceStack commandSourceStack;
+    final Component originalMessage;
+    final boolean isPreview;
+
+    public ChatDecorationProcessor(final MinecraftServer server, final @Nullable ServerPlayer player, final @Nullable CommandSourceStack commandSourceStack, final net.minecraft.network.chat.Component originalMessage, final boolean isPreview) {
+        this.server = server;
+        this.player = player;
+        this.commandSourceStack = commandSourceStack;
+        this.originalMessage = PaperAdventure.asAdventure(originalMessage);
+        this.isPreview = isPreview;
+    }
+
+    public CompletableFuture<ChatDecorator.Result> process() {
+        return CompletableFuture.supplyAsync(() -> {
+            ChatDecorator.Result result = new ChatDecorator.ModernResult(this.originalMessage, true, false);
+            if (canYouHearMe(AsyncPlayerChatPreviewEvent.getHandlerList())) {
+                result = this.processLegacy(result);
+            }
+            return this.processModern(result);
+        }, this.server.chatExecutor);
+    }
+
+    private ChatDecorator.Result processLegacy(final ChatDecorator.Result input) {
+        if (this.player != null) {
+            final CraftPlayer player = this.player.getBukkitEntity();
+            final String originalMessage = legacySection().serialize(this.originalMessage);
+            final AsyncPlayerChatPreviewEvent event = new AsyncPlayerChatPreviewEvent(true, player, originalMessage, new LazyPlayerSet(this.server));
+            this.post(event);
+
+            final boolean isDefaultFormat = DEFAULT_LEGACY_FORMAT.equals(event.getFormat());
+            if (event.isCancelled() || (isDefaultFormat && originalMessage.equals(event.getMessage()))) {
+                return input;
+            } else {
+                final Component message = legacySection().deserialize(event.getMessage());
+                final Component component = isDefaultFormat ? message : legacyFormat(event.getFormat(), ((CraftPlayer) event.getPlayer()), legacySection().deserialize(event.getMessage()));
+                return legacy(component, event.getFormat(), new ChatDecorator.MessagePair(message, event.getMessage()), isDefaultFormat);
+            }
+        }
+        return input;
+    }
+
+    private ChatDecorator.Result processModern(final ChatDecorator.Result input) {
+        final @Nullable CraftPlayer player = Util.mapNullable(this.player, ServerPlayer::getBukkitEntity);
+
+        final Component initialResult = input.message().component();
+        final AsyncChatDecorateEvent event;
+        if (this.commandSourceStack != null) {
+            // TODO more command decorate context
+            event = new AsyncChatCommandDecorateEvent(true, player, this.originalMessage, this.isPreview, initialResult);
+        } else {
+            event = new AsyncChatDecorateEvent(true, player, this.originalMessage, this.isPreview, initialResult);
+        }
+        this.post(event);
+        if (!event.isCancelled() && !event.result().equals(initialResult)) {
+            if (input instanceof ChatDecorator.LegacyResult legacyResult) {
+                if (legacyResult.hasNoFormatting()) {
+                    /*
+                    The MessagePair in the decoration result may be different at this point. This is because the legacy
+                    decoration system requires the same modifications be made to the message, so we can't have the initial
+                    message value for the legacy chat events be changed by the modern decorate event.
+                     */
+                    return noFormatting(event.result(), legacyResult.format(), legacyResult.message().legacyMessage());
+                } else {
+                    final Component formatted = legacyFormat(legacyResult.format(), player, event.result());
+                    return withFormatting(formatted, legacyResult.format(), event.result(), legacyResult.message().legacyMessage());
+                }
+            } else {
+                return new ChatDecorator.ModernResult(event.result(), true, false);
+            }
+        }
+        return input;
+    }
+
+    private void post(final Event event) {
+        this.server.server.getPluginManager().callEvent(event);
+    }
+
+    private static Component legacyFormat(final String format, final @Nullable CraftPlayer player, final Component message) {
+        final List<TagResolver.Single> args = new ArrayList<>(player != null ? 2 : 1);
+        if (player != null) {
+            args.add(Placeholder.component(DISPLAY_NAME_TAG, displayName(player)));
+        }
+        args.add(Placeholder.component(CONTENT_TAG, message));
+        String miniMsg = MiniMessage.miniMessage().serialize(legacySection().deserialize(format));
+        miniMsg = DISPLAY_NAME_PATTERN.matcher(miniMsg).replaceFirst("<" + DISPLAY_NAME_TAG + ">");
+        miniMsg = CONTENT_PATTERN.matcher(miniMsg).replaceFirst("<" + CONTENT_TAG + ">");
+        return MiniMessage.miniMessage().deserialize(miniMsg, TagResolver.resolver(args));
+    }
+
+    public static ChatDecorator.LegacyResult legacy(final Component maybeFormatted, final String format, final ChatDecorator.MessagePair message, final boolean hasNoFormatting) {
+        return new ChatDecorator.LegacyResult(maybeFormatted, format, message, hasNoFormatting, false);
+    }
+
+    public static ChatDecorator.LegacyResult noFormatting(final Component component, final String format, final String legacyMessage) {
+        return new ChatDecorator.LegacyResult(component, format, new ChatDecorator.MessagePair(component, legacyMessage), true, true);
+    }
+
+    public static ChatDecorator.LegacyResult withFormatting(final Component formatted, final String format, final Component message, final String legacyMessage) {
+        return new ChatDecorator.LegacyResult(formatted, format, new ChatDecorator.MessagePair(message, legacyMessage), false, true);
+    }
+}
diff --git a/src/main/java/io/papermc/paper/adventure/ChatProcessor.java b/src/main/java/io/papermc/paper/adventure/ChatProcessor.java
new file mode 100644
index 0000000000000000000000000000000000000000..12ea885e815b6814a74ac3aa9d9c325e53721ecd
--- /dev/null
+++ b/src/main/java/io/papermc/paper/adventure/ChatProcessor.java
@@ -0,0 +1,379 @@
+package io.papermc.paper.adventure;
+
+import com.google.common.base.Suppliers;
+import io.papermc.paper.chat.ChatRenderer;
+import io.papermc.paper.event.player.AbstractChatEvent;
+import io.papermc.paper.event.player.AsyncChatEvent;
+import io.papermc.paper.event.player.ChatEvent;
+import java.util.BitSet;
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.concurrent.ExecutionException;
+import java.util.function.Function;
+import java.util.function.Supplier;
+import net.kyori.adventure.audience.Audience;
+import net.kyori.adventure.audience.MessageType;
+import net.kyori.adventure.text.Component;
+import net.minecraft.Util;
+import net.minecraft.network.chat.ChatDecorator;
+import net.minecraft.network.chat.ChatMessageContent;
+import net.minecraft.network.chat.ChatType;
+import net.minecraft.network.chat.OutgoingPlayerChatMessage;
+import net.minecraft.network.chat.PlayerChatMessage;
+import net.minecraft.resources.ResourceKey;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.level.ServerPlayer;
+import org.bukkit.command.CommandSender;
+import org.bukkit.command.ConsoleCommandSender;
+import org.bukkit.craftbukkit.entity.CraftPlayer;
+import org.bukkit.craftbukkit.util.LazyPlayerSet;
+import org.bukkit.craftbukkit.util.Waitable;
+import org.bukkit.entity.Player;
+import org.bukkit.event.Event;
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.player.AsyncPlayerChatEvent;
+import org.bukkit.event.player.PlayerChatEvent;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.checker.nullness.qual.Nullable;
+import org.checkerframework.framework.qual.DefaultQualifier;
+
+import static net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection;
+
+@DefaultQualifier(NonNull.class)
+public final class ChatProcessor {
+    static final String DEFAULT_LEGACY_FORMAT = "<%1$s> %2$s"; // copied from PlayerChatEvent/AsyncPlayerChatEvent
+    final MinecraftServer server;
+    final ServerPlayer player;
+    final PlayerChatMessage message;
+    final boolean async;
+    final String craftbukkit$originalMessage;
+    final Component paper$originalMessage;
+    final OutgoingPlayerChatMessage outgoing;
+
+    static final int MESSAGE_CHANGED = 1;
+    static final int FORMAT_CHANGED = 2;
+    static final int SENDER_CHANGED = 3; // Not used
+    // static final int FORCE_PREVIEW_USE = 4; // TODO (future, maybe?)
+    private final BitSet flags = new BitSet(3);
+
+    public ChatProcessor(final MinecraftServer server, final ServerPlayer player, final PlayerChatMessage message, final boolean async) {
+        this.server = server;
+        this.player = player;
+        /*
+        CraftBukkit's preview/decoration system relies on both the "decorate" and chat event making the same modifications. If
+        there is unsigned content in the legacyMessage, that is because the player sent the legacyMessage without it being
+        previewed (probably by sending it too quickly). We can just ignore that because the same changes will
+        happen in the chat event.
+
+        If unsigned content is present, it will be the same as `this.legacyMessage.signedContent().previewResult().component()`.
+         */
+        this.message = message;
+        this.async = async;
+        if (this.message.signedContent().decorationResult().modernized()) {
+            this.craftbukkit$originalMessage = this.message.signedContent().decorationResult().message().legacyMessage();
+        } else {
+            this.craftbukkit$originalMessage = message.signedContent().plain();
+        }
+        /*
+        this.paper$originalMessage is the input to paper's chat events. This should be the decorated message component.
+        Even if the legacy preview event modified the format, and the client signed the formatted message, this should
+        still just be the message component.
+         */
+        this.paper$originalMessage = this.message.signedContent().decorationResult().message().component();
+        this.outgoing = OutgoingPlayerChatMessage.create(this.message);
+    }
+
+    @SuppressWarnings("deprecated")
+    public void process() {
+        final boolean listenersOnAsyncEvent = canYouHearMe(AsyncPlayerChatEvent.getHandlerList());
+        final boolean listenersOnSyncEvent = canYouHearMe(PlayerChatEvent.getHandlerList());
+        if (listenersOnAsyncEvent || listenersOnSyncEvent) {
+            final CraftPlayer player = this.player.getBukkitEntity();
+            final AsyncPlayerChatEvent ae = new AsyncPlayerChatEvent(this.async, player, this.craftbukkit$originalMessage, new LazyPlayerSet(this.server));
+            this.post(ae);
+            if (listenersOnSyncEvent) {
+                final PlayerChatEvent se = new PlayerChatEvent(player, ae.getMessage(), ae.getFormat(), ae.getRecipients());
+                se.setCancelled(ae.isCancelled()); // propagate cancelled state
+                this.queueIfAsyncOrRunImmediately(new Waitable<Void>() {
+                    @Override
+                    protected Void evaluate() {
+                        ChatProcessor.this.post(se);
+                        return null;
+                    }
+                });
+                this.readLegacyModifications(se.getMessage(), se.getFormat(), se.getPlayer());
+                this.processModern(
+                    this.modernRenderer(se.getFormat()),
+                    this.viewersFromLegacy(se.getRecipients()),
+                    this.modernMessage(se.getMessage()),
+                    se.getPlayer(),
+                    se.isCancelled()
+                );
+            } else {
+                this.readLegacyModifications(ae.getMessage(), ae.getFormat(), ae.getPlayer());
+                this.processModern(
+                    this.modernRenderer(ae.getFormat()),
+                    this.viewersFromLegacy(ae.getRecipients()),
+                    this.modernMessage(ae.getMessage()),
+                    ae.getPlayer(),
+                    ae.isCancelled()
+                );
+            }
+        } else {
+            this.processModern(
+                defaultRenderer(),
+                new LazyChatAudienceSet(this.server),
+                this.paper$originalMessage,
+                this.player.getBukkitEntity(),
+                false
+            );
+        }
+    }
+
+    private ChatRenderer modernRenderer(final String format) {
+        if (this.flags.get(FORMAT_CHANGED)) {
+            return legacyRenderer(format);
+        } else if (this.message.signedContent().decorationResult() instanceof ChatDecorator.LegacyResult legacyResult) {
+            return legacyRenderer(legacyResult.format());
+        } else {
+            return defaultRenderer();
+        }
+    }
+
+    private Component modernMessage(final String legacyMessage) {
+        if (this.flags.get(MESSAGE_CHANGED)) {
+            return legacySection().deserialize(legacyMessage);
+        } else if (this.message.unsignedContent().isEmpty() && this.message.signedContent().decorationResult() instanceof ChatDecorator.LegacyResult legacyResult) {
+            return legacyResult.message().component();
+        } else {
+            return this.paper$originalMessage;
+        }
+    }
+
+    private void readLegacyModifications(final String message, final String format, final Player playerSender) {
+        final ChatMessageContent content = this.message.signedContent();
+        if (content.decorationResult() instanceof ChatDecorator.LegacyResult result) {
+            if ((content.isDecorated() || this.message.unsignedContent().isPresent()) && !result.modernized()) {
+                this.flags.set(MESSAGE_CHANGED, !message.equals(result.message().legacyMessage()));
+            } else {
+                this.flags.set(MESSAGE_CHANGED, !message.equals(this.craftbukkit$originalMessage));
+            }
+            this.flags.set(FORMAT_CHANGED, !format.equals(result.format()));
+        } else {
+            this.flags.set(MESSAGE_CHANGED, !message.equals(this.craftbukkit$originalMessage));
+            this.flags.set(FORMAT_CHANGED, !format.equals(DEFAULT_LEGACY_FORMAT));
+        }
+        this.flags.set(SENDER_CHANGED, playerSender != this.player.getBukkitEntity());
+    }
+
+    private void processModern(final ChatRenderer renderer, final Set<Audience> viewers, final Component message, final Player player, final boolean cancelled) {
+        final AsyncChatEvent ae = new AsyncChatEvent(this.async, player, viewers, renderer, message, this.paper$originalMessage);
+        ae.setCancelled(cancelled); // propagate cancelled state
+        this.post(ae);
+        final boolean listenersOnSyncEvent = canYouHearMe(ChatEvent.getHandlerList());
+        if (listenersOnSyncEvent) {
+            this.queueIfAsyncOrRunImmediately(new Waitable<Void>() {
+                @Override
+                protected Void evaluate() {
+                    final ChatEvent se = new ChatEvent(player, ae.viewers(), ae.renderer(), ae.message(), ChatProcessor.this.paper$originalMessage/*, ae.usePreviewComponent()*/);
+                    se.setCancelled(ae.isCancelled()); // propagate cancelled state
+                    ChatProcessor.this.post(se);
+                    ChatProcessor.this.readModernModifications(se, renderer);
+                    ChatProcessor.this.complete(se);
+                    return null;
+                }
+            });
+        } else {
+            this.readModernModifications(ae, renderer);
+            this.complete(ae);
+        }
+    }
+
+    private void readModernModifications(final AbstractChatEvent chatEvent, final ChatRenderer originalRenderer) {
+        if (this.message.signedContent().isDecorated()) {
+            this.flags.set(MESSAGE_CHANGED, !chatEvent.message().equals(this.message.signedContent().decorationResult().message().component()));
+        } else {
+            this.flags.set(MESSAGE_CHANGED, !chatEvent.message().equals(this.paper$originalMessage));
+        }
+        if (originalRenderer != chatEvent.renderer()) { // don't set to false if it hasn't changed
+            this.flags.set(FORMAT_CHANGED, true);
+        }
+        // this.flags.set(FORCE_PREVIEW_USE, chatEvent.usePreviewComponent()); // TODO (future, maybe?)
+    }
+
+    private void complete(final AbstractChatEvent event) {
+        if (event.isCancelled()) {
+            this.outgoing.sendHeadersToRemainingPlayers(this.server.getPlayerList());
+            return;
+        }
+
+        final CraftPlayer player = ((CraftPlayer) event.getPlayer());
+        final Component displayName = displayName(player);
+        final Component message = event.message();
+        final ChatRenderer renderer = event.renderer();
+
+        final Set<Audience> viewers = event.viewers();
+        final ResourceKey<ChatType> chatTypeKey = renderer instanceof ChatRenderer.Default ? ChatType.CHAT : ChatType.RAW;
+        final ChatType.Bound chatType = ChatType.bind(chatTypeKey, this.player.level.registryAccess(), PaperAdventure.asVanilla(displayName(player)));
+
+        OutgoingChat outgoingChat = viewers instanceof LazyChatAudienceSet lazyAudienceSet && lazyAudienceSet.isLazy() ? new ServerOutgoingChat() : new ViewersOutgoingChat();
+        /* if (this.flags.get(FORCE_PREVIEW_USE)) { // TODO (future, maybe?)
+            outgoingChat.sendOriginal(player, viewers, chatType);
+        } else */
+        if (this.flags.get(FORMAT_CHANGED)) {
+            if (renderer instanceof ChatRenderer.ViewerUnaware unaware) {
+                outgoingChat.sendFormatChangedViewerUnaware(player, PaperAdventure.asVanilla(unaware.render(player, displayName, message)), viewers, chatType);
+            } else {
+                outgoingChat.sendFormatChangedViewerAware(player, displayName, message, renderer, viewers, chatType);
+            }
+        } else if (this.flags.get(MESSAGE_CHANGED)) {
+            if (!(renderer instanceof ChatRenderer.ViewerUnaware unaware)) {
+                throw new IllegalStateException("BUG: There should not be a non-legacy renderer at this point");
+            }
+            final Component renderedComponent = chatTypeKey == ChatType.CHAT ? message : unaware.render(player, displayName, message);
+            outgoingChat.sendMessageChanged(player, PaperAdventure.asVanilla(renderedComponent), viewers, chatType);
+        } else {
+            outgoingChat.sendOriginal(player, viewers, chatType);
+        }
+    }
+
+    interface OutgoingChat {
+        default void sendFormatChangedViewerUnaware(CraftPlayer player, net.minecraft.network.chat.Component renderedMessage, Set<Audience> viewers, ChatType.Bound chatType) {
+            this.sendMessageChanged(player, renderedMessage, viewers, chatType);
+        }
+
+        void sendFormatChangedViewerAware(CraftPlayer player, Component displayName, Component message, ChatRenderer renderer, Set<Audience> viewers, ChatType.Bound chatType);
+
+        void sendMessageChanged(CraftPlayer player, net.minecraft.network.chat.Component renderedMessage, Set<Audience> viewers, ChatType.Bound chatType);
+
+        void sendOriginal(CraftPlayer player, Set<Audience> viewers, ChatType.Bound chatType);
+    }
+
+    final class ServerOutgoingChat implements OutgoingChat {
+        @Override
+        public void sendFormatChangedViewerAware(CraftPlayer player, Component displayName, Component message, ChatRenderer renderer, Set<Audience> viewers, ChatType.Bound chatType) {
+            ChatProcessor.this.server.getPlayerList().broadcastChatMessage(ChatProcessor.this.message, ChatProcessor.this.player, chatType, viewer -> PaperAdventure.asVanilla(renderer.render(player, displayName, message, viewer)));
+        }
+
+        @Override
+        public void sendMessageChanged(CraftPlayer player, net.minecraft.network.chat.Component renderedMessage, Set<Audience> viewers, ChatType.Bound chatType) {
+            ChatProcessor.this.server.getPlayerList().broadcastChatMessage(ChatProcessor.this.message.withUnsignedContent(renderedMessage), ChatProcessor.this.player, chatType);
+        }
+
+        @Override
+        public void sendOriginal(CraftPlayer player, Set<Audience> viewers, ChatType.Bound chatType) {
+            ChatProcessor.this.server.getPlayerList().broadcastChatMessage(ChatProcessor.this.message, ChatProcessor.this.player, chatType);
+        }
+    }
+
+    final class ViewersOutgoingChat implements OutgoingChat {
+        @Override
+        public void sendFormatChangedViewerAware(CraftPlayer player, Component displayName, Component message, ChatRenderer renderer, Set<Audience> viewers, ChatType.Bound chatType) {
+            this.broadcastToViewers(viewers, player, chatType, v -> PaperAdventure.asVanilla(renderer.render(player, displayName, message, v)));
+        }
+
+        @Override
+        public void sendMessageChanged(CraftPlayer player, net.minecraft.network.chat.Component renderedMessage, Set<Audience> viewers, ChatType.Bound chatType) {
+            this.broadcastToViewers(viewers, player, chatType, new ConstantFunction(renderedMessage));
+        }
+
+        @Override
+        public void sendOriginal(CraftPlayer player, Set<Audience> viewers, ChatType.Bound chatType) {
+            this.broadcastToViewers(viewers, player, chatType, null);
+        }
+
+        private void broadcastToViewers(Collection<Audience> viewers, final Player source, final ChatType.Bound chatType, final @Nullable Function<Audience, net.minecraft.network.chat.Component> msgFunction) {
+            final Supplier<Component> fallbackSupplier = Suppliers.memoize(() -> PaperAdventure.asAdventure(msgFunction instanceof ConstantFunction constantFunction ? constantFunction.component : ChatProcessor.this.message.serverContent()));
+            final Function<Audience, Component> audienceMsgFunction = !(msgFunction instanceof ConstantFunction || msgFunction == null) ? msgFunction.andThen(PaperAdventure::asAdventure) : viewer -> fallbackSupplier.get();
+            for (Audience viewer : viewers) {
+                if (viewer instanceof Player || viewer instanceof ConsoleCommandSender) {
+                    // players and console have builtin PlayerChatMessage sending support while other audiences do not
+                    this.sendToViewer((CommandSender) viewer, chatType, msgFunction);
+                } else {
+                    viewer.sendMessage(source, audienceMsgFunction.apply(viewer), MessageType.CHAT);
+                }
+            }
+
+            // Make sure to send remaining headers
+            ChatProcessor.this.outgoing.sendHeadersToRemainingPlayers(ChatProcessor.this.server.getPlayerList());
+        }
+
+        private void sendToViewer(final CommandSender viewer, final ChatType.Bound chatType, final @Nullable Function<Audience, net.minecraft.network.chat.Component> msgFunction) {
+            if (viewer instanceof ConsoleCommandSender) {
+                this.sendToServer(chatType, msgFunction);
+            } else if (viewer instanceof CraftPlayer craftPlayer) {
+                craftPlayer.getHandle().sendChatMessage(ChatProcessor.this.outgoing, ChatProcessor.this.player.shouldFilterMessageTo(craftPlayer.getHandle()), chatType, Util.mapNullable(msgFunction, f -> f.apply(viewer)));
+            } else {
+                throw new IllegalStateException("Should only be a Player or Console");
+            }
+        }
+
+        private void sendToServer(final ChatType.Bound chatType, final @Nullable Function<Audience, net.minecraft.network.chat.Component> msgFunction) {
+            final PlayerChatMessage toConsoleMessage = msgFunction == null ? ChatProcessor.this.message : ChatProcessor.this.message.withUnsignedContent(msgFunction.apply(ChatProcessor.this.server.console));
+            ChatProcessor.this.server.logChatMessage(toConsoleMessage.serverContent(), chatType, ChatProcessor.this.server.getPlayerList().verifyChatTrusted(toConsoleMessage, ChatProcessor.this.player.asChatSender()) ? null : "Not Secure");
+        }
+
+        record ConstantFunction(net.minecraft.network.chat.Component component) implements Function<Audience, net.minecraft.network.chat.Component> {
+            @Override
+            public net.minecraft.network.chat.Component apply(Audience audience) {
+                return this.component;
+            }
+        }
+    }
+
+    private Set<Audience> viewersFromLegacy(final Set<Player> recipients) {
+        if (recipients instanceof LazyPlayerSet lazyPlayerSet && lazyPlayerSet.isLazy()) {
+            return new LazyChatAudienceSet(this.server);
+        }
+        final HashSet<Audience> viewers = new HashSet<>(recipients);
+        viewers.add(this.server.console);
+        return viewers;
+    }
+
+    static String legacyDisplayName(final CraftPlayer player) {
+        return player.getDisplayName();
+    }
+
+    static Component displayName(final CraftPlayer player) {
+        return player.displayName();
+    }
+
+    private static ChatRenderer.Default defaultRenderer() {
+        return (ChatRenderer.Default) ChatRenderer.defaultRenderer();
+    }
+
+    private static ChatRenderer legacyRenderer(final String format) {
+        if (DEFAULT_LEGACY_FORMAT.equals(format)) {
+            return defaultRenderer();
+        }
+        return ChatRenderer.viewerUnaware((player, sourceDisplayName, message) -> legacySection().deserialize(legacyFormat(format, player, legacySection().serialize(message))));
+    }
+
+    static String legacyFormat(final String format, Player player, String message) {
+        return String.format(format, legacyDisplayName((CraftPlayer) player), message);
+    }
+
+    private void queueIfAsyncOrRunImmediately(final Waitable<Void> waitable) {
+        if (this.async) {
+            this.server.processQueue.add(waitable);
+        } else {
+            waitable.run();
+        }
+        try {
+            waitable.get();
+        } catch (final InterruptedException e) {
+            Thread.currentThread().interrupt(); // tag, you're it
+        } catch (final ExecutionException e) {
+            throw new RuntimeException("Exception processing chat", e.getCause());
+        }
+    }
+
+    private void post(final Event event) {
+        this.server.server.getPluginManager().callEvent(event);
+    }
+
+    static boolean canYouHearMe(final HandlerList handlers) {
+        return handlers.getRegisteredListeners().length > 0;
+    }
+}
diff --git a/src/main/java/io/papermc/paper/adventure/DisplayNames.java b/src/main/java/io/papermc/paper/adventure/DisplayNames.java
new file mode 100644
index 0000000000000000000000000000000000000000..3957f68182e8f7a773613a687f1d9a0cfa4f066c
--- /dev/null
+++ b/src/main/java/io/papermc/paper/adventure/DisplayNames.java
@@ -0,0 +1,24 @@
+package io.papermc.paper.adventure;
+
+import net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer;
+import net.minecraft.server.level.ServerPlayer;
+import org.bukkit.ChatColor;
+import org.bukkit.craftbukkit.entity.CraftPlayer;
+
+public final class DisplayNames {
+    private DisplayNames() {
+    }
+
+    public static String getLegacy(final CraftPlayer player) {
+        return getLegacy(player.getHandle());
+    }
+
+    public static String getLegacy(final ServerPlayer player) {
+        final String legacy = player.displayName;
+        if (legacy != null) {
+            // thank you for being worse than wet socks, Bukkit
+            return LegacyComponentSerializer.legacySection().serialize(player.adventure$displayName) + ChatColor.getLastColors(player.displayName);
+        }
+        return LegacyComponentSerializer.legacySection().serialize(player.adventure$displayName);
+    }
+}
diff --git a/src/main/java/io/papermc/paper/adventure/LazyChatAudienceSet.java b/src/main/java/io/papermc/paper/adventure/LazyChatAudienceSet.java
new file mode 100644
index 0000000000000000000000000000000000000000..2fd6c3e65354071af71c7d8ebb97b559b6e105ce
--- /dev/null
+++ b/src/main/java/io/papermc/paper/adventure/LazyChatAudienceSet.java
@@ -0,0 +1,26 @@
+package io.papermc.paper.adventure;
+
+import java.util.HashSet;
+import java.util.Set;
+import net.kyori.adventure.audience.Audience;
+import net.minecraft.server.MinecraftServer;
+import org.bukkit.Bukkit;
+import org.bukkit.craftbukkit.util.LazyHashSet;
+import org.bukkit.craftbukkit.util.LazyPlayerSet;
+import org.bukkit.entity.Player;
+
+final class LazyChatAudienceSet extends LazyHashSet<Audience> {
+    private final MinecraftServer server;
+
+    public LazyChatAudienceSet(final MinecraftServer server) {
+        this.server = server;
+    }
+
+    @Override
+    protected Set<Audience> makeReference() {
+        final Set<Player> playerSet = LazyPlayerSet.makePlayerSet(this.server);
+        final HashSet<Audience> audiences = new HashSet<>(playerSet);
+        audiences.add(Bukkit.getConsoleSender());
+        return audiences;
+    }
+}
diff --git a/src/main/java/io/papermc/paper/adventure/PaperAdventure.java b/src/main/java/io/papermc/paper/adventure/PaperAdventure.java
new file mode 100644
index 0000000000000000000000000000000000000000..6679038054796b9bdfeb6fb4b29e50aa63052101
--- /dev/null
+++ b/src/main/java/io/papermc/paper/adventure/PaperAdventure.java
@@ -0,0 +1,331 @@
+package io.papermc.paper.adventure;
+
+import com.mojang.brigadier.exceptions.CommandSyntaxException;
+import io.netty.util.AttributeKey;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import net.kyori.adventure.bossbar.BossBar;
+import net.kyori.adventure.inventory.Book;
+import net.kyori.adventure.key.Key;
+import net.kyori.adventure.nbt.api.BinaryTagHolder;
+import net.kyori.adventure.sound.Sound;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.TranslatableComponent;
+import net.kyori.adventure.text.flattener.ComponentFlattener;
+import net.kyori.adventure.text.format.TextColor;
+import net.kyori.adventure.text.serializer.ComponentSerializer;
+import net.kyori.adventure.text.serializer.gson.GsonComponentSerializer;
+import net.kyori.adventure.text.serializer.plain.PlainComponentSerializer;
+import net.kyori.adventure.text.serializer.plain.PlainTextComponentSerializer;
+import net.kyori.adventure.translation.GlobalTranslator;
+import net.kyori.adventure.translation.TranslationRegistry;
+import net.kyori.adventure.translation.Translator;
+import net.kyori.adventure.util.Codec;
+import net.minecraft.ChatFormatting;
+import net.minecraft.locale.Language;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.nbt.ListTag;
+import net.minecraft.nbt.StringTag;
+import net.minecraft.nbt.TagParser;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.sounds.SoundSource;
+import net.minecraft.world.BossEvent;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.item.WrittenBookItem;
+import org.bukkit.ChatColor;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+public final class PaperAdventure {
+    public static final AttributeKey<Locale> LOCALE_ATTRIBUTE = AttributeKey.valueOf("adventure:locale");
+    private static final Pattern LOCALIZATION_PATTERN = Pattern.compile("%(?:(\\d+)\\$)?s");
+    public static final ComponentFlattener FLATTENER = ComponentFlattener.basic().toBuilder()
+        .complexMapper(TranslatableComponent.class, (translatable, consumer) -> {
+            if (!Language.getInstance().has(translatable.key())) {
+                for (final Translator source : GlobalTranslator.translator().sources()) {
+                    if (source instanceof TranslationRegistry registry && registry.contains(translatable.key())) {
+                        consumer.accept(GlobalTranslator.render(translatable, Locale.US));
+                        return;
+                    }
+                }
+            }
+            final @NotNull String translated = Language.getInstance().getOrDefault(translatable.key());
+
+            final Matcher matcher = LOCALIZATION_PATTERN.matcher(translated);
+            final List<Component> args = translatable.args();
+            int argPosition = 0;
+            int lastIdx = 0;
+            while (matcher.find()) {
+                // append prior
+                if (lastIdx < matcher.start()) {
+                    consumer.accept(Component.text(translated.substring(lastIdx, matcher.start())));
+                }
+                lastIdx = matcher.end();
+
+                final @Nullable String argIdx = matcher.group(1);
+                // calculate argument position
+                if (argIdx != null) {
+                    try {
+                        final int idx = Integer.parseInt(argIdx) - 1;
+                        if (idx < args.size()) {
+                            consumer.accept(args.get(idx));
+                        }
+                    } catch (final NumberFormatException ex) {
+                        // ignore, drop the format placeholder
+                    }
+                } else {
+                    final int idx = argPosition++;
+                    if (idx < args.size()) {
+                        consumer.accept(args.get(idx));
+                    }
+                }
+            }
+
+            // append tail
+            if (lastIdx < translated.length()) {
+                consumer.accept(Component.text(translated.substring(lastIdx)));
+            }
+        })
+        .build();
+    @Deprecated public static final PlainComponentSerializer PLAIN = PlainComponentSerializer.builder().flattener(FLATTENER).build();
+    private static final Codec<CompoundTag, String, IOException, IOException> NBT_CODEC = new Codec<CompoundTag, String, IOException, IOException>() {
+        @Override
+        public @NotNull CompoundTag decode(final @NotNull String encoded) throws IOException {
+            try {
+                return TagParser.parseTag(encoded);
+            } catch (final CommandSyntaxException e) {
+                throw new IOException(e);
+            }
+        }
+
+        @Override
+        public @NotNull String encode(final @NotNull CompoundTag decoded) {
+            return decoded.toString();
+        }
+    };
+    public static final ComponentSerializer<Component, Component, net.minecraft.network.chat.Component> WRAPPER_AWARE_SERIALIZER = new WrapperAwareSerializer();
+
+    private PaperAdventure() {
+    }
+
+    // Key
+
+    public static ResourceLocation asVanilla(final Key key) {
+        return new ResourceLocation(key.namespace(), key.value());
+    }
+
+    public static ResourceLocation asVanillaNullable(final Key key) {
+        if (key == null) {
+            return null;
+        }
+        return asVanilla(key);
+    }
+
+    // Component
+
+    public static Component asAdventure(final net.minecraft.network.chat.Component component) {
+        return component == null ? Component.empty() : GsonComponentSerializer.gson().serializer().fromJson(net.minecraft.network.chat.Component.Serializer.toJsonTree(component), Component.class);
+    }
+
+    public static ArrayList<Component> asAdventure(final List<net.minecraft.network.chat.Component> vanillas) {
+        final ArrayList<Component> adventures = new ArrayList<>(vanillas.size());
+        for (final net.minecraft.network.chat.Component vanilla : vanillas) {
+            adventures.add(asAdventure(vanilla));
+        }
+        return adventures;
+    }
+
+    public static ArrayList<Component> asAdventureFromJson(final List<String> jsonStrings) {
+        final ArrayList<Component> adventures = new ArrayList<>(jsonStrings.size());
+        for (final String json : jsonStrings) {
+            adventures.add(GsonComponentSerializer.gson().deserialize(json));
+        }
+        return adventures;
+    }
+
+    public static List<String> asJson(final List<Component> adventures) {
+        final List<String> jsons = new ArrayList<>(adventures.size());
+        for (final Component component : adventures) {
+            jsons.add(GsonComponentSerializer.gson().serialize(component));
+        }
+        return jsons;
+    }
+
+    public static net.minecraft.network.chat.Component asVanilla(final Component component) {
+        if (component == null) return null;
+        if (true) return new AdventureComponent(component);
+        return net.minecraft.network.chat.Component.Serializer.fromJson(GsonComponentSerializer.gson().serializer().toJsonTree(component));
+    }
+
+    public static List<net.minecraft.network.chat.Component> asVanilla(final List<Component> adventures) {
+        final List<net.minecraft.network.chat.Component> vanillas = new ArrayList<>(adventures.size());
+        for (final Component adventure : adventures) {
+            vanillas.add(asVanilla(adventure));
+        }
+        return vanillas;
+    }
+
+    public static String asJsonString(final Component component, final Locale locale) {
+        return GsonComponentSerializer.gson().serialize(translated(component, locale));
+    }
+
+    public static String asJsonString(final net.minecraft.network.chat.Component component, final Locale locale) {
+        if (component instanceof AdventureComponent) {
+            return asJsonString(((AdventureComponent) component).adventure, locale);
+        }
+        return net.minecraft.network.chat.Component.Serializer.toJson(component);
+    }
+
+    public static String asPlain(final Component component, final Locale locale) {
+        return PlainTextComponentSerializer.plainText().serialize(translated(component, locale));
+    }
+
+    private static Component translated(final Component component, final Locale locale) {
+        return GlobalTranslator.render(
+            component,
+            // play it safe
+            locale != null
+                ? locale
+                : Locale.US
+        );
+    }
+
+    // BossBar
+
+    public static BossEvent.BossBarColor asVanilla(final BossBar.Color color) {
+        return switch (color) {
+            case PINK -> BossEvent.BossBarColor.PINK;
+            case BLUE -> BossEvent.BossBarColor.BLUE;
+            case RED -> BossEvent.BossBarColor.RED;
+            case GREEN -> BossEvent.BossBarColor.GREEN;
+            case YELLOW -> BossEvent.BossBarColor.YELLOW;
+            case PURPLE -> BossEvent.BossBarColor.PURPLE;
+            case WHITE -> BossEvent.BossBarColor.WHITE;
+        };
+    }
+
+    public static BossBar.Color asAdventure(final BossEvent.BossBarColor color) {
+        return switch (color) {
+            case PINK -> BossBar.Color.PINK;
+            case BLUE -> BossBar.Color.BLUE;
+            case RED -> BossBar.Color.RED;
+            case GREEN -> BossBar.Color.GREEN;
+            case YELLOW -> BossBar.Color.YELLOW;
+            case PURPLE -> BossBar.Color.PURPLE;
+            case WHITE -> BossBar.Color.WHITE;
+        };
+    }
+
+    public static BossEvent.BossBarOverlay asVanilla(final BossBar.Overlay overlay) {
+        return switch (overlay) {
+            case PROGRESS -> BossEvent.BossBarOverlay.PROGRESS;
+            case NOTCHED_6 -> BossEvent.BossBarOverlay.NOTCHED_6;
+            case NOTCHED_10 -> BossEvent.BossBarOverlay.NOTCHED_10;
+            case NOTCHED_12 -> BossEvent.BossBarOverlay.NOTCHED_12;
+            case NOTCHED_20 -> BossEvent.BossBarOverlay.NOTCHED_20;
+        };
+    }
+
+    public static BossBar.Overlay asAdventure(final BossEvent.BossBarOverlay overlay) {
+        return switch (overlay) {
+            case PROGRESS -> BossBar.Overlay.PROGRESS;
+            case NOTCHED_6 -> BossBar.Overlay.NOTCHED_6;
+            case NOTCHED_10 -> BossBar.Overlay.NOTCHED_10;
+            case NOTCHED_12 -> BossBar.Overlay.NOTCHED_12;
+            case NOTCHED_20 -> BossBar.Overlay.NOTCHED_20;
+        };
+    }
+
+    public static void setFlag(final BossBar bar, final BossBar.Flag flag, final boolean value) {
+        if (value) {
+            bar.addFlag(flag);
+        } else {
+            bar.removeFlag(flag);
+        }
+    }
+
+    // Book
+
+    public static ItemStack asItemStack(final Book book, final Locale locale) {
+        final ItemStack item = new ItemStack(net.minecraft.world.item.Items.WRITTEN_BOOK, 1);
+        final CompoundTag tag = item.getOrCreateTag();
+        tag.putString(WrittenBookItem.TAG_TITLE, validateField(asPlain(book.title(), locale), WrittenBookItem.TITLE_MAX_LENGTH, WrittenBookItem.TAG_TITLE));
+        tag.putString(WrittenBookItem.TAG_AUTHOR, asPlain(book.author(), locale));
+        final ListTag pages = new ListTag();
+        if (book.pages().size() > WrittenBookItem.MAX_PAGES) {
+            throw new IllegalArgumentException("Book provided had " + book.pages().size() + " pages, but is only allowed a maximum of " + WrittenBookItem.MAX_PAGES);
+        }
+        for (final Component page : book.pages()) {
+            pages.add(StringTag.valueOf(validateField(asJsonString(page, locale), WrittenBookItem.PAGE_LENGTH, "page")));
+        }
+        tag.put(WrittenBookItem.TAG_PAGES, pages);
+        return item;
+    }
+
+    private static String validateField(final String content, final int length, final String name) {
+        if (content == null) {
+            return content;
+        }
+
+        final int actual = content.length();
+        if (actual > length) {
+            throw new IllegalArgumentException("Field '" + name + "' has a maximum length of " + length + " but was passed '" + content + "', which was " + actual + " characters long.");
+        }
+        return content;
+    }
+
+    // Sounds
+
+    public static SoundSource asVanilla(final Sound.Source source) {
+        return switch (source) {
+            case MASTER -> SoundSource.MASTER;
+            case MUSIC -> SoundSource.MUSIC;
+            case RECORD -> SoundSource.RECORDS;
+            case WEATHER -> SoundSource.WEATHER;
+            case BLOCK -> SoundSource.BLOCKS;
+            case HOSTILE -> SoundSource.HOSTILE;
+            case NEUTRAL -> SoundSource.NEUTRAL;
+            case PLAYER -> SoundSource.PLAYERS;
+            case AMBIENT -> SoundSource.AMBIENT;
+            case VOICE -> SoundSource.VOICE;
+        };
+    }
+
+    public static @Nullable SoundSource asVanillaNullable(final Sound.@Nullable Source source) {
+        if (source == null) {
+            return null;
+        }
+        return asVanilla(source);
+    }
+
+    // NBT
+
+    public static @Nullable BinaryTagHolder asBinaryTagHolder(final @Nullable CompoundTag tag) {
+        if (tag == null) {
+            return null;
+        }
+        try {
+            return BinaryTagHolder.encode(tag, NBT_CODEC);
+        } catch (final IOException e) {
+            return null;
+        }
+    }
+
+    // Colors
+
+    public static @NotNull TextColor asAdventure(final ChatFormatting formatting) {
+        final Integer color = formatting.getColor();
+        if (color == null) {
+            throw new IllegalArgumentException("Not a valid color");
+        }
+        return TextColor.color(color);
+    }
+
+    public static @Nullable ChatFormatting asVanilla(final TextColor color) {
+        return ChatFormatting.getByHexValue(color.value());
+    }
+}
diff --git a/src/main/java/io/papermc/paper/adventure/VanillaBossBarListener.java b/src/main/java/io/papermc/paper/adventure/VanillaBossBarListener.java
new file mode 100644
index 0000000000000000000000000000000000000000..7493efba31403cbe7f26e493f165f1b83aa847bb
--- /dev/null
+++ b/src/main/java/io/papermc/paper/adventure/VanillaBossBarListener.java
@@ -0,0 +1,44 @@
+package io.papermc.paper.adventure;
+
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.function.Function;
+
+import net.kyori.adventure.bossbar.BossBar;
+import net.kyori.adventure.text.Component;
+import net.minecraft.network.protocol.game.ClientboundBossEventPacket;
+import net.minecraft.world.BossEvent;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+public final class VanillaBossBarListener implements BossBar.Listener {
+    private final Consumer<Function<BossEvent, ClientboundBossEventPacket>> action;
+
+    public VanillaBossBarListener(final Consumer<Function<BossEvent, ClientboundBossEventPacket>> action) {
+        this.action = action;
+    }
+
+    @Override
+    public void bossBarNameChanged(final @NonNull BossBar bar, final @NonNull Component oldName, final @NonNull Component newName) {
+        this.action.accept(ClientboundBossEventPacket::createUpdateNamePacket);
+    }
+
+    @Override
+    public void bossBarProgressChanged(final @NonNull BossBar bar, final float oldProgress, final float newProgress) {
+        this.action.accept(ClientboundBossEventPacket::createUpdateProgressPacket);
+    }
+
+    @Override
+    public void bossBarColorChanged(final @NonNull BossBar bar, final BossBar.@NonNull Color oldColor, final BossBar.@NonNull Color newColor) {
+        this.action.accept(ClientboundBossEventPacket::createUpdateStylePacket);
+    }
+
+    @Override
+    public void bossBarOverlayChanged(final @NonNull BossBar bar, final BossBar.@NonNull Overlay oldOverlay, final BossBar.@NonNull Overlay newOverlay) {
+        this.action.accept(ClientboundBossEventPacket::createUpdateStylePacket);
+    }
+
+    @Override
+    public void bossBarFlagsChanged(final @NonNull BossBar bar, final @NonNull Set<BossBar.Flag> flagsAdded, final @NonNull Set<BossBar.Flag> flagsRemoved) {
+        this.action.accept(ClientboundBossEventPacket::createUpdatePropertiesPacket);
+    }
+}
diff --git a/src/main/java/io/papermc/paper/adventure/WrapperAwareSerializer.java b/src/main/java/io/papermc/paper/adventure/WrapperAwareSerializer.java
new file mode 100644
index 0000000000000000000000000000000000000000..2a08e0461db4e699b7e6a1558a4419c848fc7f4f
--- /dev/null
+++ b/src/main/java/io/papermc/paper/adventure/WrapperAwareSerializer.java
@@ -0,0 +1,20 @@
+package io.papermc.paper.adventure;
+
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.serializer.ComponentSerializer;
+import net.kyori.adventure.text.serializer.gson.GsonComponentSerializer;
+
+final class WrapperAwareSerializer implements ComponentSerializer<Component, Component, net.minecraft.network.chat.Component> {
+    @Override
+    public Component deserialize(final net.minecraft.network.chat.Component input) {
+        if (input instanceof AdventureComponent) {
+            return ((AdventureComponent) input).adventure;
+        }
+        return GsonComponentSerializer.gson().serializer().fromJson(net.minecraft.network.chat.Component.Serializer.toJsonTree(input), Component.class);
+    }
+
+    @Override
+    public net.minecraft.network.chat.Component serialize(final Component component) {
+        return net.minecraft.network.chat.Component.Serializer.fromJson(GsonComponentSerializer.gson().serializer().toJsonTree(component));
+    }
+}
diff --git a/src/main/java/io/papermc/paper/adventure/providers/ComponentLoggerProviderImpl.java b/src/main/java/io/papermc/paper/adventure/providers/ComponentLoggerProviderImpl.java
new file mode 100644
index 0000000000000000000000000000000000000000..c3631efda9c7fa531a8a9f18fbee7b5f8655382b
--- /dev/null
+++ b/src/main/java/io/papermc/paper/adventure/providers/ComponentLoggerProviderImpl.java
@@ -0,0 +1,19 @@
+package io.papermc.paper.adventure.providers;
+
+import io.papermc.paper.adventure.PaperAdventure;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.logger.slf4j.ComponentLogger;
+import net.kyori.adventure.text.logger.slf4j.ComponentLoggerProvider;
+import org.jetbrains.annotations.NotNull;
+import org.slf4j.LoggerFactory;
+
+public class ComponentLoggerProviderImpl implements ComponentLoggerProvider {
+    @Override
+    public @NotNull ComponentLogger logger(@NotNull LoggerHelper helper, @NotNull String name) {
+        return helper.delegating(LoggerFactory.getLogger(name), this::serialize);
+    }
+
+    private String serialize(final Component message) {
+        return PaperAdventure.asPlain(message, null);
+    }
+}
diff --git a/src/main/java/io/papermc/paper/adventure/providers/GsonComponentSerializerProviderImpl.java b/src/main/java/io/papermc/paper/adventure/providers/GsonComponentSerializerProviderImpl.java
new file mode 100644
index 0000000000000000000000000000000000000000..c620d5aa2b0208b769dbe9563f0e99edc9a91047
--- /dev/null
+++ b/src/main/java/io/papermc/paper/adventure/providers/GsonComponentSerializerProviderImpl.java
@@ -0,0 +1,30 @@
+package io.papermc.paper.adventure.providers;
+
+import net.kyori.adventure.text.serializer.gson.GsonComponentSerializer;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.function.Consumer;
+
+@SuppressWarnings("UnstableApiUsage") // permitted provider
+public class GsonComponentSerializerProviderImpl implements GsonComponentSerializer.Provider {
+
+    @Override
+    public @NotNull GsonComponentSerializer gson() {
+        return GsonComponentSerializer.builder()
+            .legacyHoverEventSerializer(NBTLegacyHoverEventSerializer.INSTANCE)
+            .build();
+    }
+
+    @Override
+    public @NotNull GsonComponentSerializer gsonLegacy() {
+        return GsonComponentSerializer.builder()
+            .legacyHoverEventSerializer(NBTLegacyHoverEventSerializer.INSTANCE)
+            .downsampleColors()
+            .build();
+    }
+
+    @Override
+    public @NotNull Consumer<GsonComponentSerializer.Builder> builder() {
+        return builder -> builder.legacyHoverEventSerializer(NBTLegacyHoverEventSerializer.INSTANCE);
+    }
+}
diff --git a/src/main/java/io/papermc/paper/adventure/providers/LegacyComponentSerializerProviderImpl.java b/src/main/java/io/papermc/paper/adventure/providers/LegacyComponentSerializerProviderImpl.java
new file mode 100644
index 0000000000000000000000000000000000000000..03723dbe32b7eb95253e8ff6e72dbf8d2300a059
--- /dev/null
+++ b/src/main/java/io/papermc/paper/adventure/providers/LegacyComponentSerializerProviderImpl.java
@@ -0,0 +1,36 @@
+package io.papermc.paper.adventure.providers;
+
+import io.papermc.paper.adventure.PaperAdventure;
+import net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.function.Consumer;
+
+@SuppressWarnings("UnstableApiUsage") // permitted provider
+public class LegacyComponentSerializerProviderImpl implements LegacyComponentSerializer.Provider {
+
+    @Override
+    public @NotNull LegacyComponentSerializer legacyAmpersand() {
+        return LegacyComponentSerializer.builder()
+            .flattener(PaperAdventure.FLATTENER)
+            .character(LegacyComponentSerializer.AMPERSAND_CHAR)
+            .hexColors()
+            .useUnusualXRepeatedCharacterHexFormat()
+            .build();
+    }
+
+    @Override
+    public @NotNull LegacyComponentSerializer legacySection() {
+        return LegacyComponentSerializer.builder()
+            .flattener(PaperAdventure.FLATTENER)
+            .character(LegacyComponentSerializer.SECTION_CHAR)
+            .hexColors()
+            .useUnusualXRepeatedCharacterHexFormat()
+            .build();
+    }
+
+    @Override
+    public @NotNull Consumer<LegacyComponentSerializer.Builder> legacy() {
+        return builder -> builder.flattener(PaperAdventure.FLATTENER);
+    }
+}
diff --git a/src/main/java/io/papermc/paper/adventure/providers/MiniMessageProviderImpl.java b/src/main/java/io/papermc/paper/adventure/providers/MiniMessageProviderImpl.java
new file mode 100644
index 0000000000000000000000000000000000000000..25fd6992c869c841b1b1b3240f4d524948487614
--- /dev/null
+++ b/src/main/java/io/papermc/paper/adventure/providers/MiniMessageProviderImpl.java
@@ -0,0 +1,20 @@
+package io.papermc.paper.adventure.providers;
+
+import net.kyori.adventure.text.minimessage.MiniMessage;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.function.Consumer;
+
+@SuppressWarnings("UnstableApiUsage") // permitted provider
+public class MiniMessageProviderImpl implements MiniMessage.Provider {
+
+    @Override
+    public @NotNull MiniMessage miniMessage() {
+        return MiniMessage.builder().build();
+    }
+
+    @Override
+    public @NotNull Consumer<MiniMessage.Builder> builder() {
+        return builder -> {};
+    }
+}
diff --git a/src/main/java/io/papermc/paper/adventure/providers/NBTLegacyHoverEventSerializer.java b/src/main/java/io/papermc/paper/adventure/providers/NBTLegacyHoverEventSerializer.java
new file mode 100644
index 0000000000000000000000000000000000000000..b3514a3e415f3444a235f1a45f0c53741264e516
--- /dev/null
+++ b/src/main/java/io/papermc/paper/adventure/providers/NBTLegacyHoverEventSerializer.java
@@ -0,0 +1,89 @@
+package io.papermc.paper.adventure.providers;
+
+import com.mojang.brigadier.exceptions.CommandSyntaxException;
+import net.kyori.adventure.key.Key;
+import net.kyori.adventure.nbt.api.BinaryTagHolder;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.event.HoverEvent;
+import net.kyori.adventure.text.serializer.gson.LegacyHoverEventSerializer;
+import net.kyori.adventure.text.serializer.plain.PlainTextComponentSerializer;
+import net.kyori.adventure.util.Codec;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.nbt.Tag;
+import net.minecraft.nbt.TagParser;
+
+import java.io.IOException;
+import java.util.UUID;
+
+final class NBTLegacyHoverEventSerializer implements LegacyHoverEventSerializer {
+    public static final NBTLegacyHoverEventSerializer INSTANCE = new NBTLegacyHoverEventSerializer();
+    private static final Codec<CompoundTag, String, CommandSyntaxException, RuntimeException> SNBT_CODEC = Codec.codec(TagParser::parseTag, Tag::toString);
+
+    static final String ITEM_TYPE = "id";
+    static final String ITEM_COUNT = "Count";
+    static final String ITEM_TAG = "tag";
+
+    static final String ENTITY_NAME = "name";
+    static final String ENTITY_TYPE = "type";
+    static final String ENTITY_ID = "id";
+
+    NBTLegacyHoverEventSerializer() {
+    }
+
+    @Override
+    public HoverEvent.ShowItem deserializeShowItem(final Component input) throws IOException {
+        final String raw = PlainTextComponentSerializer.plainText().serialize(input);
+        try {
+            final CompoundTag contents = SNBT_CODEC.decode(raw);
+            final CompoundTag tag = contents.getCompound(ITEM_TAG);
+            return HoverEvent.ShowItem.of(
+                Key.key(contents.getString(ITEM_TYPE)),
+                contents.contains(ITEM_COUNT) ? contents.getByte(ITEM_COUNT) : 1,
+                tag.isEmpty() ? null : BinaryTagHolder.encode(tag, SNBT_CODEC)
+            );
+        } catch (final CommandSyntaxException ex) {
+            throw new IOException(ex);
+        }
+    }
+
+    @Override
+    public HoverEvent.ShowEntity deserializeShowEntity(final Component input, final Codec.Decoder<Component, String, ? extends RuntimeException> componentCodec) throws IOException {
+        final String raw = PlainTextComponentSerializer.plainText().serialize(input);
+        try {
+            final CompoundTag contents = SNBT_CODEC.decode(raw);
+            return HoverEvent.ShowEntity.of(
+                Key.key(contents.getString(ENTITY_TYPE)),
+                UUID.fromString(contents.getString(ENTITY_ID)),
+                componentCodec.decode(contents.getString(ENTITY_NAME))
+            );
+        } catch (final CommandSyntaxException ex) {
+            throw new IOException(ex);
+        }
+    }
+
+    @Override
+    public Component serializeShowItem(final HoverEvent.ShowItem input) throws IOException {
+        final CompoundTag tag = new CompoundTag();
+        tag.putString(ITEM_TYPE, input.item().asString());
+        tag.putByte(ITEM_COUNT, (byte) input.count());
+        if (input.nbt() != null) {
+            try {
+                tag.put(ITEM_TAG, input.nbt().get(SNBT_CODEC));
+            } catch (final CommandSyntaxException ex) {
+                throw new IOException(ex);
+            }
+        }
+        return Component.text(SNBT_CODEC.encode(tag));
+    }
+
+    @Override
+    public Component serializeShowEntity(final HoverEvent.ShowEntity input, final Codec.Encoder<Component, String, ? extends RuntimeException> componentCodec) throws IOException {
+        final CompoundTag tag = new CompoundTag();
+        tag.putString(ENTITY_ID, input.id().toString());
+        tag.putString(ENTITY_TYPE, input.type().asString());
+        if (input.name() != null) {
+            tag.putString(ENTITY_NAME, componentCodec.encode(input.name()));
+        }
+        return Component.text(SNBT_CODEC.encode(tag));
+    }
+}
diff --git a/src/main/java/io/papermc/paper/adventure/providers/PlainTextComponentSerializerProviderImpl.java b/src/main/java/io/papermc/paper/adventure/providers/PlainTextComponentSerializerProviderImpl.java
new file mode 100644
index 0000000000000000000000000000000000000000..c0701d4f93a4d77a8177d2dd8d5076f9f781873d
--- /dev/null
+++ b/src/main/java/io/papermc/paper/adventure/providers/PlainTextComponentSerializerProviderImpl.java
@@ -0,0 +1,23 @@
+package io.papermc.paper.adventure.providers;
+
+import io.papermc.paper.adventure.PaperAdventure;
+import net.kyori.adventure.text.serializer.plain.PlainTextComponentSerializer;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.function.Consumer;
+
+@SuppressWarnings("UnstableApiUsage") // permitted provider
+public class PlainTextComponentSerializerProviderImpl implements PlainTextComponentSerializer.Provider {
+
+    @Override
+    public @NotNull PlainTextComponentSerializer plainTextSimple() {
+        return PlainTextComponentSerializer.builder()
+            .flattener(PaperAdventure.FLATTENER)
+            .build();
+    }
+
+    @Override
+    public @NotNull Consumer<PlainTextComponentSerializer.Builder> plainText() {
+        return builder -> builder.flattener(PaperAdventure.FLATTENER);
+    }
+}
diff --git a/src/main/java/net/kyori/adventure/bossbar/HackyBossBarPlatformBridge.java b/src/main/java/net/kyori/adventure/bossbar/HackyBossBarPlatformBridge.java
new file mode 100644
index 0000000000000000000000000000000000000000..2dc92d8d2764d3e9b621d5c7d5e30c30367b3117
--- /dev/null
+++ b/src/main/java/net/kyori/adventure/bossbar/HackyBossBarPlatformBridge.java
@@ -0,0 +1,36 @@
+package net.kyori.adventure.bossbar;
+
+import io.papermc.paper.adventure.PaperAdventure;
+import io.papermc.paper.adventure.VanillaBossBarListener;
+import net.minecraft.server.level.ServerBossEvent;
+import org.bukkit.craftbukkit.entity.CraftPlayer;
+
+public abstract class HackyBossBarPlatformBridge {
+    public ServerBossEvent vanilla$bar;
+    private VanillaBossBarListener vanilla$listener;
+
+    public final void paper$playerShow(final CraftPlayer player) {
+        if (this.vanilla$bar == null) {
+            final BossBar $this = (BossBar) this;
+            this.vanilla$bar = new ServerBossEvent(
+                PaperAdventure.asVanilla($this.name()),
+                PaperAdventure.asVanilla($this.color()),
+                PaperAdventure.asVanilla($this.overlay())
+            );
+            this.vanilla$bar.adventure = $this;
+            this.vanilla$listener = new VanillaBossBarListener(this.vanilla$bar::broadcast);
+            $this.addListener(this.vanilla$listener);
+        }
+        this.vanilla$bar.addPlayer(player.getHandle());
+    }
+
+    public final void paper$playerHide(final CraftPlayer player) {
+        if (this.vanilla$bar != null) {
+            this.vanilla$bar.removePlayer(player.getHandle());
+            if (this.vanilla$bar.getPlayers().isEmpty()) {
+                ((BossBar) this).removeListener(this.vanilla$listener);
+                this.vanilla$bar = null;
+            }
+        }
+    }
+}
diff --git a/src/main/java/net/minecraft/ChatFormatting.java b/src/main/java/net/minecraft/ChatFormatting.java
index 98f2def9125d6faf5859572a004fa8d2fa066417..436f381c727cda72c04859c540dce4715b445390 100644
--- a/src/main/java/net/minecraft/ChatFormatting.java
+++ b/src/main/java/net/minecraft/ChatFormatting.java
@@ -113,6 +113,18 @@ public enum ChatFormatting implements StringRepresentable {
         return name == null ? null : FORMATTING_BY_NAME.get(cleanName(name));
     }
 
+    // Paper start
+    @Nullable public static ChatFormatting getByHexValue(int i) {
+        for (ChatFormatting value : values()) {
+            if (value.getColor() != null && value.getColor() == i) {
+                return value;
+            }
+        }
+
+        return null;
+    }
+    // Paper end
+
     @Nullable
     public static ChatFormatting getById(int colorIndex) {
         if (colorIndex < 0) {
diff --git a/src/main/java/net/minecraft/commands/arguments/MessageArgument.java b/src/main/java/net/minecraft/commands/arguments/MessageArgument.java
index 83ffb7a08630fdaf8655569d82974625c0eaf1ff..4da1ebcd0226897f8b03bd00a851f793df3506f4 100644
--- a/src/main/java/net/minecraft/commands/arguments/MessageArgument.java
+++ b/src/main/java/net/minecraft/commands/arguments/MessageArgument.java
@@ -88,7 +88,7 @@ public class MessageArgument implements SignedArgument<MessageArgument.Message>
             MinecraftServer minecraftServer = source.getServer();
             source.getChatMessageChainer().append(() -> {
                 CompletableFuture<FilteredText> completableFuture = this.filterPlainText(source, this.signedArgument.signedContent().plain());
-                CompletableFuture<PlayerChatMessage> completableFuture2 = minecraftServer.getChatDecorator().decorate(source.getPlayer(), this.signedArgument);
+                CompletableFuture<PlayerChatMessage> completableFuture2 = minecraftServer.getChatDecorator().decorate(source.getPlayer(), source,this.signedArgument); // Paper
                 return CompletableFuture.allOf(completableFuture, completableFuture2).thenAcceptAsync((void_) -> {
                     PlayerChatMessage playerChatMessage = completableFuture2.join().filter(completableFuture.join().mask());
                     callback.accept(playerChatMessage);
@@ -131,7 +131,7 @@ public class MessageArgument implements SignedArgument<MessageArgument.Message>
 
         CompletableFuture<Component> resolveDecoratedComponent(CommandSourceStack source) throws CommandSyntaxException {
             Component component = this.resolveComponent(source);
-            CompletableFuture<Component> completableFuture = source.getServer().getChatDecorator().decorate(source.getPlayer(), component);
+            CompletableFuture<Component> completableFuture = source.getServer().getChatDecorator().decorate(source.getPlayer(), source, component, true).thenApply(net.minecraft.network.chat.ChatDecorator.Result::component); // Paper
             MessageArgument.logResolutionFailure(source, completableFuture);
             return completableFuture;
         }
diff --git a/src/main/java/net/minecraft/network/FriendlyByteBuf.java b/src/main/java/net/minecraft/network/FriendlyByteBuf.java
index c4854debe11b8bb61fa49c76c1854f94c1e7777f..42514a0c7066dc79050c0496d6463528b593f9e4 100644
--- a/src/main/java/net/minecraft/network/FriendlyByteBuf.java
+++ b/src/main/java/net/minecraft/network/FriendlyByteBuf.java
@@ -18,6 +18,7 @@ import io.netty.handler.codec.EncoderException;
 import io.netty.util.ByteProcessor;
 import it.unimi.dsi.fastutil.ints.IntArrayList;
 import it.unimi.dsi.fastutil.ints.IntList;
+import io.papermc.paper.adventure.PaperAdventure; // Paper
 import java.io.DataOutput;
 import java.io.IOException;
 import java.io.InputStream;
@@ -75,6 +76,7 @@ public class FriendlyByteBuf extends ByteBuf {
     private static final int MAX_VARLONG_SIZE = 10;
     private static final int DEFAULT_NBT_QUOTA = 2097152;
     private final ByteBuf source;
+    public java.util.Locale adventure$locale; // Paper
     public static final short MAX_STRING_LENGTH = 32767;
     public static final int MAX_COMPONENT_STRING_LENGTH = 262144;
     private static final int PUBLIC_KEY_SIZE = 256;
@@ -433,8 +435,15 @@ public class FriendlyByteBuf extends ByteBuf {
         }
     }
 
+    // Paper start
+    public FriendlyByteBuf writeComponent(final net.kyori.adventure.text.Component component) {
+        return this.writeUtf(PaperAdventure.asJsonString(component, this.adventure$locale), 262144);
+    }
+    // Paper end
+
     public FriendlyByteBuf writeComponent(Component text) {
-        return this.writeUtf(Component.Serializer.toJson(text), 262144);
+        //return this.a(IChatBaseComponent.ChatSerializer.a(ichatbasecomponent), 262144); // Paper - comment
+        return this.writeUtf(PaperAdventure.asJsonString(text, this.adventure$locale), 262144); // Paper
     }
 
     public <T extends Enum<T>> T readEnum(Class<T> enumClass) {
diff --git a/src/main/java/net/minecraft/network/PacketEncoder.java b/src/main/java/net/minecraft/network/PacketEncoder.java
index 021a26a6b1c258deffc26c035ab52a4ea027d9a1..00d432bd395e7f7fb6ee24e371818d13892b2f0c 100644
--- a/src/main/java/net/minecraft/network/PacketEncoder.java
+++ b/src/main/java/net/minecraft/network/PacketEncoder.java
@@ -4,6 +4,7 @@ import com.mojang.logging.LogUtils;
 import io.netty.buffer.ByteBuf;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.handler.codec.MessageToByteEncoder;
+import io.papermc.paper.adventure.PaperAdventure; // Paper
 import java.io.IOException;
 import net.minecraft.network.protocol.Packet;
 import net.minecraft.network.protocol.PacketFlow;
@@ -33,6 +34,7 @@ public class PacketEncoder extends MessageToByteEncoder<Packet<?>> {
             } else {
                 FriendlyByteBuf friendlyByteBuf = new FriendlyByteBuf(byteBuf);
                 friendlyByteBuf.writeVarInt(integer);
+                friendlyByteBuf.adventure$locale = channelHandlerContext.channel().attr(PaperAdventure.LOCALE_ATTRIBUTE).get(); // Paper
 
                 try {
                     int i = friendlyByteBuf.writerIndex();
diff --git a/src/main/java/net/minecraft/network/chat/ChatDecorator.java b/src/main/java/net/minecraft/network/chat/ChatDecorator.java
index 0906160cb6b6b211ad50a29e5ab80ac99ac8b85b..1fbd30c52c2f1aa0594bd744ab4590709f5d34dd 100644
--- a/src/main/java/net/minecraft/network/chat/ChatDecorator.java
+++ b/src/main/java/net/minecraft/network/chat/ChatDecorator.java
@@ -10,12 +10,82 @@ public interface ChatDecorator {
         return CompletableFuture.completedFuture(message);
     };
 
+    @io.papermc.paper.annotation.DoNotUse // Paper
     CompletableFuture<Component> decorate(@Nullable ServerPlayer sender, Component message);
 
+    @io.papermc.paper.annotation.DoNotUse // Paper
     default CompletableFuture<PlayerChatMessage> decorate(@Nullable ServerPlayer sender, PlayerChatMessage message) {
-        return message.signedContent().isDecorated() ? CompletableFuture.completedFuture(message) : this.decorate(sender, message.serverContent()).thenApply(message::withUnsignedContent);
+        return this.decorate(sender, null, message); // Paper
     }
 
+    // Paper start
+    default CompletableFuture<Result> decorate(@Nullable ServerPlayer sender, @Nullable net.minecraft.commands.CommandSourceStack commandSourceStack, Component message, boolean isPreview) {
+        throw new UnsupportedOperationException("Must override this implementation");
+    }
+
+    static ChatDecorator create(ImprovedChatDecorator delegate) {
+        return new ChatDecorator() {
+            @Override
+            public CompletableFuture<Component> decorate(@Nullable ServerPlayer sender, Component message) {
+                return this.decorate(sender, null, message, true).thenApply(Result::component);
+            }
+
+            @Override
+            public CompletableFuture<Result> decorate(@Nullable ServerPlayer sender, @Nullable net.minecraft.commands.CommandSourceStack commandSourceStack, Component message, boolean isPreview) {
+                return delegate.decorate(sender, commandSourceStack, message, isPreview);
+            }
+        };
+    }
+
+    @FunctionalInterface
+    interface ImprovedChatDecorator {
+        CompletableFuture<Result> decorate(@Nullable ServerPlayer sender, @Nullable net.minecraft.commands.CommandSourceStack commandSourceStack, Component message, boolean isPreview);
+    }
+
+    interface Result {
+        boolean hasNoFormatting();
+
+        Component component();
+
+        MessagePair message();
+
+        boolean modernized();
+    }
+
+    record MessagePair(net.kyori.adventure.text.Component component, String legacyMessage) { }
+
+    record LegacyResult(Component component, String format, MessagePair message, boolean hasNoFormatting, boolean modernized) implements Result {
+        public LegacyResult(net.kyori.adventure.text.Component component, String format, MessagePair message, boolean hasNoFormatting, boolean modernified) {
+            this(io.papermc.paper.adventure.PaperAdventure.asVanilla(component), format, message, hasNoFormatting, modernified);
+        }
+        public LegacyResult {
+            component = component instanceof io.papermc.paper.adventure.AdventureComponent adventureComponent ? adventureComponent.deepConverted() : component;
+        }
+    }
+
+    record ModernResult(Component maybeAdventureComponent, boolean hasNoFormatting, boolean modernized) implements Result {
+        public ModernResult(net.kyori.adventure.text.Component component, boolean hasNoFormatting, boolean modernized) {
+            this(io.papermc.paper.adventure.PaperAdventure.asVanilla(component), hasNoFormatting, modernized);
+        }
+
+        @Override
+        public Component component() {
+            return this.maybeAdventureComponent instanceof io.papermc.paper.adventure.AdventureComponent adventureComponent ? adventureComponent.deepConverted() : this.maybeAdventureComponent;
+        }
+
+        @Override
+        public MessagePair message() {
+            final net.kyori.adventure.text.Component adventureComponent = io.papermc.paper.adventure.PaperAdventure.WRAPPER_AWARE_SERIALIZER.deserialize(this.maybeAdventureComponent);
+            return new MessagePair(adventureComponent, net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().serialize(adventureComponent));
+        }
+    }
+    default CompletableFuture<PlayerChatMessage> decorate(@Nullable ServerPlayer serverPlayer, @Nullable net.minecraft.commands.CommandSourceStack commandSourceStack, PlayerChatMessage playerChatMessage) {
+        return playerChatMessage.signedContent().isDecorated() ? CompletableFuture.completedFuture(playerChatMessage) : this.decorate(serverPlayer, commandSourceStack, playerChatMessage.serverContent(), false).thenApply(result -> {
+            return new PlayerChatMessage(playerChatMessage.signedHeader(), playerChatMessage.headerSignature(), playerChatMessage.signedBody().withContent(playerChatMessage.signedContent().withDecorationResult(result)), playerChatMessage.unsignedContent(), playerChatMessage.filterMask()).withUnsignedContent(result.component());
+        });
+    }
+    // Paper end
+
     static PlayerChatMessage attachIfNotDecorated(PlayerChatMessage message, Component attached) {
         return !message.signedContent().isDecorated() ? message.withUnsignedContent(attached) : message;
     }
diff --git a/src/main/java/net/minecraft/network/chat/ChatMessageContent.java b/src/main/java/net/minecraft/network/chat/ChatMessageContent.java
index b1c76ccfb4527337ac2c9ad2d2c7e34df0c4c660..e7caa6380b07f9bd34c2f8c821c0f6d3cb4e7649 100644
--- a/src/main/java/net/minecraft/network/chat/ChatMessageContent.java
+++ b/src/main/java/net/minecraft/network/chat/ChatMessageContent.java
@@ -3,7 +3,17 @@ package net.minecraft.network.chat;
 import java.util.Objects;
 import net.minecraft.network.FriendlyByteBuf;
 
-public record ChatMessageContent(String plain, Component decorated) {
+// Paper start
+public record ChatMessageContent(String plain, Component decorated, ChatDecorator.Result decorationResult) {
+
+    public ChatMessageContent(String plain, Component decorated) {
+        this(plain, decorated, new ChatDecorator.ModernResult(decorated, true, false));
+    }
+
+    public ChatMessageContent withDecorationResult(ChatDecorator.Result result) {
+        return new ChatMessageContent(this.plain, this.decorated, result);
+    }
+    // Paper end
     public ChatMessageContent(String content) {
         this(content, Component.literal(content));
     }
diff --git a/src/main/java/net/minecraft/network/chat/ChatPreviewCache.java b/src/main/java/net/minecraft/network/chat/ChatPreviewCache.java
index 85e75f3eb58be03b500e663a128663cbe9331605..487822cc8e491c38a276d0d78db6f5207de8a65b 100644
--- a/src/main/java/net/minecraft/network/chat/ChatPreviewCache.java
+++ b/src/main/java/net/minecraft/network/chat/ChatPreviewCache.java
@@ -1,27 +1,44 @@
 package net.minecraft.network.chat;
 
 import javax.annotation.Nullable;
+import net.minecraft.Util;
 
 public class ChatPreviewCache {
     @Nullable
     private ChatPreviewCache.Result result;
 
     public void set(String query, Component preview) {
-        this.result = new ChatPreviewCache.Result(query, preview);
+        // Paper start
+        this.set(query, new ChatDecorator.ModernResult(java.util.Objects.requireNonNull(preview), true, false));
+    }
+    public void set(String query, ChatDecorator.Result decoratorResult) {
+        this.result = new ChatPreviewCache.Result(query, java.util.Objects.requireNonNull(decoratorResult));
+        // Paper end
     }
 
     @Nullable
     public Component pull(String query) {
+        // Paper start
+        return net.minecraft.Util.mapNullable(this.pullFull(query), Result::preview);
+    }
+    public @Nullable Result pullFull(String query) {
+        // Paper end
         ChatPreviewCache.Result result = this.result;
         if (result != null && result.matches(query)) {
             this.result = null;
-            return result.preview();
+            return result; // Paper
         } else {
             return null;
         }
     }
 
-    static record Result(String query, Component preview) {
+    // Paper start
+    public record Result(String query, ChatDecorator.Result decoratorResult) {
+
+        public Component preview() {
+            return this.decoratorResult.component();
+        }
+        // Paper end
         public boolean matches(String query) {
             return this.query.equals(query);
         }
diff --git a/src/main/java/net/minecraft/network/chat/Component.java b/src/main/java/net/minecraft/network/chat/Component.java
index 06736982f7625c1a532315afe94e5e0c45ec1331..e7d9e2d8c87ddf3658b1c2e0f2a3e98ef8080cec 100644
--- a/src/main/java/net/minecraft/network/chat/Component.java
+++ b/src/main/java/net/minecraft/network/chat/Component.java
@@ -1,6 +1,7 @@
 package net.minecraft.network.chat;
 
 import com.google.common.collect.Lists;
+import io.papermc.paper.adventure.AdventureComponent; // Paper
 import com.google.gson.Gson;
 import com.google.gson.GsonBuilder;
 import com.google.gson.JsonArray;
@@ -216,6 +217,7 @@ public interface Component extends Message, FormattedText, Iterable<Component> {
             GsonBuilder gsonbuilder = new GsonBuilder();
 
             gsonbuilder.disableHtmlEscaping();
+            gsonbuilder.registerTypeAdapter(AdventureComponent.class, new AdventureComponent.Serializer()); // Paper
             gsonbuilder.registerTypeHierarchyAdapter(Component.class, new Component.Serializer());
             gsonbuilder.registerTypeHierarchyAdapter(Style.class, new Style.Serializer());
             gsonbuilder.registerTypeAdapterFactory(new LowerCaseEnumTypeAdapterFactory());
@@ -391,6 +393,7 @@ public interface Component extends Message, FormattedText, Iterable<Component> {
         }
 
         public JsonElement serialize(Component ichatbasecomponent, Type type, JsonSerializationContext jsonserializationcontext) {
+            if (ichatbasecomponent instanceof AdventureComponent) return jsonserializationcontext.serialize(ichatbasecomponent); // Paper
             JsonObject jsonobject = new JsonObject();
 
             if (!ichatbasecomponent.getStyle().isEmpty()) {
diff --git a/src/main/java/net/minecraft/network/chat/OutgoingPlayerChatMessage.java b/src/main/java/net/minecraft/network/chat/OutgoingPlayerChatMessage.java
index de717cf25308bbade7b2c0a9187cf89238663636..bd82f0316df85b621c1970ff30bbbec0d2712ccd 100644
--- a/src/main/java/net/minecraft/network/chat/OutgoingPlayerChatMessage.java
+++ b/src/main/java/net/minecraft/network/chat/OutgoingPlayerChatMessage.java
@@ -14,6 +14,12 @@ public interface OutgoingPlayerChatMessage {
 
     void sendToPlayer(ServerPlayer sender, boolean filterMaskEnabled, ChatType.Bound params);
 
+    // Paper start
+    default void sendToPlayer(ServerPlayer sender, boolean filterMaskEnabled, ChatType.Bound params, @javax.annotation.Nullable Component unsigned) {
+        this.sendToPlayer(sender, filterMaskEnabled, params);
+    }
+    // Paper end
+
     void sendHeadersToRemainingPlayers(PlayerList playerManager);
 
     static OutgoingPlayerChatMessage create(PlayerChatMessage message) {
@@ -34,7 +40,15 @@ public interface OutgoingPlayerChatMessage {
 
         @Override
         public void sendToPlayer(ServerPlayer sender, boolean filterMaskEnabled, ChatType.Bound params) {
+            // Paper start
+            this.sendToPlayer(sender, filterMaskEnabled, params, null);
+        }
+
+        @Override
+        public void sendToPlayer(ServerPlayer sender, boolean filterMaskEnabled, ChatType.Bound params, @javax.annotation.Nullable Component unsigned) {
+            // Paper end
             PlayerChatMessage playerChatMessage = this.message.filter(filterMaskEnabled);
+            playerChatMessage = unsigned != null ? playerChatMessage.withUnsignedContent(unsigned) : playerChatMessage; // Paper
             if (!playerChatMessage.isFullyFiltered()) {
                 RegistryAccess registryAccess = sender.level.registryAccess();
                 ChatType.BoundNetwork boundNetwork = params.toNetwork(registryAccess);
@@ -64,7 +78,15 @@ public interface OutgoingPlayerChatMessage {
 
         @Override
         public void sendToPlayer(ServerPlayer sender, boolean filterMaskEnabled, ChatType.Bound params) {
+            // Paper start
+            this.sendToPlayer(sender, filterMaskEnabled, params, null);
+        }
+
+        @Override
+        public void sendToPlayer(ServerPlayer sender, boolean filterMaskEnabled, ChatType.Bound params, @javax.annotation.Nullable Component unsigned) {
+            // Paper end
             PlayerChatMessage playerChatMessage = this.message.filter(filterMaskEnabled);
+            playerChatMessage = unsigned != null ? playerChatMessage.withUnsignedContent(unsigned) : playerChatMessage; // Paper
             if (!playerChatMessage.isFullyFiltered()) {
                 this.playersWithFullMessage.add(sender);
                 RegistryAccess registryAccess = sender.level.registryAccess();
diff --git a/src/main/java/net/minecraft/network/protocol/game/ClientboundSetActionBarTextPacket.java b/src/main/java/net/minecraft/network/protocol/game/ClientboundSetActionBarTextPacket.java
index 02183c810f9968621b9b20c1f7b54258b620c507..32ef3edebe94a2014168b7e438752a80b2687e5f 100644
--- a/src/main/java/net/minecraft/network/protocol/game/ClientboundSetActionBarTextPacket.java
+++ b/src/main/java/net/minecraft/network/protocol/game/ClientboundSetActionBarTextPacket.java
@@ -6,6 +6,7 @@ import net.minecraft.network.protocol.Packet;
 
 public class ClientboundSetActionBarTextPacket implements Packet<ClientGamePacketListener> {
     private final Component text;
+    public net.kyori.adventure.text.Component adventure$text; // Paper
 
     public ClientboundSetActionBarTextPacket(Component message) {
         this.text = message;
@@ -17,6 +18,11 @@ public class ClientboundSetActionBarTextPacket implements Packet<ClientGamePacke
 
     @Override
     public void write(FriendlyByteBuf buf) {
+        // Paper start
+        if (this.adventure$text != null) {
+            buf.writeComponent(this.adventure$text);
+        } else
+        // Paper end
         buf.writeComponent(this.text);
     }
 
diff --git a/src/main/java/net/minecraft/network/protocol/game/ClientboundSetSubtitleTextPacket.java b/src/main/java/net/minecraft/network/protocol/game/ClientboundSetSubtitleTextPacket.java
index bea682c52a95863c474b8283bd4ae795e525a94f..c44a276d201fdfa5144d45d319d7761583c60639 100644
--- a/src/main/java/net/minecraft/network/protocol/game/ClientboundSetSubtitleTextPacket.java
+++ b/src/main/java/net/minecraft/network/protocol/game/ClientboundSetSubtitleTextPacket.java
@@ -6,6 +6,7 @@ import net.minecraft.network.protocol.Packet;
 
 public class ClientboundSetSubtitleTextPacket implements Packet<ClientGamePacketListener> {
     private final Component text;
+    public net.kyori.adventure.text.Component adventure$text; // Paper
 
     public ClientboundSetSubtitleTextPacket(Component subtitle) {
         this.text = subtitle;
@@ -17,6 +18,11 @@ public class ClientboundSetSubtitleTextPacket implements Packet<ClientGamePacket
 
     @Override
     public void write(FriendlyByteBuf buf) {
+        // Paper start
+        if (this.adventure$text != null) {
+            buf.writeComponent(this.adventure$text);
+        } else
+        // Paper end
         buf.writeComponent(this.text);
     }
 
diff --git a/src/main/java/net/minecraft/network/protocol/game/ClientboundSetTitleTextPacket.java b/src/main/java/net/minecraft/network/protocol/game/ClientboundSetTitleTextPacket.java
index 1fb62779527a228f748b49a4d2ddfc57ccb80cf8..bd808eb312ade7122973a47f4b96505829511da5 100644
--- a/src/main/java/net/minecraft/network/protocol/game/ClientboundSetTitleTextPacket.java
+++ b/src/main/java/net/minecraft/network/protocol/game/ClientboundSetTitleTextPacket.java
@@ -6,6 +6,7 @@ import net.minecraft.network.protocol.Packet;
 
 public class ClientboundSetTitleTextPacket implements Packet<ClientGamePacketListener> {
     private final Component text;
+    public net.kyori.adventure.text.Component adventure$text; // Paper
 
     public ClientboundSetTitleTextPacket(Component title) {
         this.text = title;
@@ -17,6 +18,11 @@ public class ClientboundSetTitleTextPacket implements Packet<ClientGamePacketLis
 
     @Override
     public void write(FriendlyByteBuf buf) {
+        // Paper start
+        if (this.adventure$text != null) {
+            buf.writeComponent(this.adventure$text);
+        } else
+        // Paper end
         buf.writeComponent(this.text);
     }
 
diff --git a/src/main/java/net/minecraft/network/protocol/game/ClientboundSystemChatPacket.java b/src/main/java/net/minecraft/network/protocol/game/ClientboundSystemChatPacket.java
index fd5cdc33c4cc8f24265b450621a13d3ab03644c2..b0052398d7ff954c2a7943ea4618d26f45d701da 100644
--- a/src/main/java/net/minecraft/network/protocol/game/ClientboundSystemChatPacket.java
+++ b/src/main/java/net/minecraft/network/protocol/game/ClientboundSystemChatPacket.java
@@ -6,16 +6,25 @@ import net.minecraft.network.chat.Component;
 import net.minecraft.network.protocol.Packet;
 
 // Spigot start
-public record ClientboundSystemChatPacket(String content, boolean overlay) implements Packet<ClientGamePacketListener> {
+public record ClientboundSystemChatPacket(@javax.annotation.Nullable net.kyori.adventure.text.Component adventure$content, @javax.annotation.Nullable String content, boolean overlay) implements Packet<ClientGamePacketListener> { // Paper - Adventure
 
     public ClientboundSystemChatPacket(Component content, boolean overlay) {
-        this(Component.Serializer.toJson(content), overlay);
+        this(null, Component.Serializer.toJson(content), overlay); // Paper - Adventure
     }
 
     public ClientboundSystemChatPacket(net.md_5.bungee.api.chat.BaseComponent[] content, boolean overlay) {
-        this(net.md_5.bungee.chat.ComponentSerializer.toString(content), overlay);
+        this(null, net.md_5.bungee.chat.ComponentSerializer.toString(content), overlay); // Paper - Adventure
     }
     // Spigot end
+    // Paper start
+    public ClientboundSystemChatPacket {
+        com.google.common.base.Preconditions.checkArgument(!(adventure$content == null && content == null), "Component adventure$content and String (json) content cannot both be null");
+    }
+
+    public ClientboundSystemChatPacket(net.kyori.adventure.text.Component content, boolean overlay) {
+        this(content, null, overlay);
+    }
+    // Paper end
 
     public ClientboundSystemChatPacket(FriendlyByteBuf buf) {
         this(buf.readComponent(), buf.readBoolean());
@@ -23,7 +32,15 @@ public record ClientboundSystemChatPacket(String content, boolean overlay) imple
 
     @Override
     public void write(FriendlyByteBuf buf) {
+        // Paper start
+        if (this.adventure$content != null) {
+            buf.writeComponent(this.adventure$content);
+        } else if (this.content != null) {
         buf.writeUtf(this.content, 262144); // Spigot
+        } else {
+            throw new IllegalArgumentException("Must supply either adventure component or string json content");
+        }
+        // Paper end
         buf.writeBoolean(this.overlay);
     }
 
diff --git a/src/main/java/net/minecraft/network/protocol/game/ClientboundTabListPacket.java b/src/main/java/net/minecraft/network/protocol/game/ClientboundTabListPacket.java
index 762a9392ffac3042356709dddd15bb3516048bed..3544e2dc2522e9d6305d727d56e73490015662c2 100644
--- a/src/main/java/net/minecraft/network/protocol/game/ClientboundTabListPacket.java
+++ b/src/main/java/net/minecraft/network/protocol/game/ClientboundTabListPacket.java
@@ -7,6 +7,10 @@ import net.minecraft.network.protocol.Packet;
 public class ClientboundTabListPacket implements Packet<ClientGamePacketListener> {
     public final Component header;
     public final Component footer;
+    // Paper start
+    public net.kyori.adventure.text.Component adventure$header;
+    public net.kyori.adventure.text.Component adventure$footer;
+    // Paper end
 
     public ClientboundTabListPacket(Component header, Component footer) {
         this.header = header;
@@ -20,6 +24,13 @@ public class ClientboundTabListPacket implements Packet<ClientGamePacketListener
 
     @Override
     public void write(FriendlyByteBuf buf) {
+        // Paper start
+        if (this.adventure$header != null && this.adventure$footer != null) {
+            buf.writeComponent(this.adventure$header);
+            buf.writeComponent(this.adventure$footer);
+            return;
+        }
+        // Paper end
         buf.writeComponent(this.header);
         buf.writeComponent(this.footer);
     }
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 805a1773d55e2551911e5b8e69052e23f630359b..e4220f14a5ebf43dd3491fc8649c2be5238c5798 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -229,6 +229,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
     private boolean allowFlight;
     @Nullable
     private String motd;
+    @Nullable private net.kyori.adventure.text.Component cachedMotd; // Paper
     private int playerIdleTimeout;
     public final long[] tickTimes;
     @Nullable
@@ -1606,8 +1607,18 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
         return this.motd;
     }
 
+    public net.kyori.adventure.text.Component getComponentMotd() {
+        net.kyori.adventure.text.Component component = cachedMotd;
+        if (this.motd != null && this.cachedMotd == null) {
+            component = cachedMotd = net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(this.motd);
+        }
+
+        return component != null ? component : net.kyori.adventure.text.Component.empty();
+    }
+
     public void setMotd(String motd) {
         this.motd = motd;
+        this.cachedMotd = null; // Paper
     }
 
     public boolean previewsChat() {
@@ -2318,27 +2329,15 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
 
     // CraftBukkit start
     public final java.util.concurrent.ExecutorService chatExecutor = java.util.concurrent.Executors.newCachedThreadPool(
-            new com.google.common.util.concurrent.ThreadFactoryBuilder().setDaemon(true).setNameFormat("Async Chat Thread - #%d").build());
+            new com.google.common.util.concurrent.ThreadFactoryBuilder().setDaemon(true).setNameFormat("Async Chat Thread - #%d").setUncaughtExceptionHandler(new net.minecraft.DefaultUncaughtExceptionHandlerWithName(net.minecraft.server.MinecraftServer.LOGGER)).build()); // Paper
 
     public ChatDecorator getChatDecorator() {
-        return (entityplayer, ichatbasecomponent) -> {
-            // SPIGOT-7127: Console /say and similar
-            if (entityplayer == null) {
-                return CompletableFuture.completedFuture(ichatbasecomponent);
-            }
-
-            return CompletableFuture.supplyAsync(() -> {
-                AsyncPlayerChatPreviewEvent event = new AsyncPlayerChatPreviewEvent(true, entityplayer.getBukkitEntity(), CraftChatMessage.fromComponent(ichatbasecomponent), new LazyPlayerSet(this));
-                String originalFormat = event.getFormat(), originalMessage = event.getMessage();
-                this.server.getPluginManager().callEvent(event);
-
-                if (originalFormat.equals(event.getFormat()) && originalMessage.equals(event.getMessage()) && event.getPlayer().getName().equalsIgnoreCase(event.getPlayer().getDisplayName())) {
-                    return ichatbasecomponent;
-                }
-
-                return CraftChatMessage.fromStringOrNull(String.format(event.getFormat(), event.getPlayer().getDisplayName(), event.getMessage()));
-            }, chatExecutor);
-        };
+        // Paper start - moved to ChatPreviewProcessor
+        return ChatDecorator.create((sender, commandSourceStack, message, isPreview) -> {
+            final io.papermc.paper.adventure.ChatDecorationProcessor processor = new io.papermc.paper.adventure.ChatDecorationProcessor(this, sender, commandSourceStack, message, isPreview);
+            return processor.process();
+        });
+        // Paper end
         // CraftBukkit end
     }
 
diff --git a/src/main/java/net/minecraft/server/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
index 84564ca128d2dfc79c0b5a13b699cf6fc80bdea7..9ab4588e4e512176b881ad4c252e400ff6ea97bd 100644
--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
@@ -154,6 +154,7 @@ import net.minecraft.world.scores.Score;
 import net.minecraft.world.scores.Scoreboard;
 import net.minecraft.world.scores.Team;
 import net.minecraft.world.scores.criteria.ObjectiveCriteria;
+import io.papermc.paper.adventure.PaperAdventure; // Paper
 import org.bukkit.Bukkit;
 import org.bukkit.Location;
 import org.bukkit.WeatherType;
@@ -230,6 +231,7 @@ public class ServerPlayer extends Player {
 
     // CraftBukkit start
     public String displayName;
+    public net.kyori.adventure.text.Component adventure$displayName; // Paper
     public Component listName;
     public org.bukkit.Location compassTarget;
     public int newExp = 0;
@@ -312,6 +314,7 @@ public class ServerPlayer extends Player {
 
         // CraftBukkit start
         this.displayName = this.getScoreboardName();
+        this.adventure$displayName = net.kyori.adventure.text.Component.text(this.getScoreboardName()); // Paper
         this.bukkitPickUpLoot = true;
         this.maxHealthCache = this.getMaxHealth();
     }
@@ -788,22 +791,17 @@ public class ServerPlayer extends Player {
 
         String deathmessage = defaultMessage.getString();
         this.keepLevel = keepInventory; // SPIGOT-2222: pre-set keepLevel
-        org.bukkit.event.entity.PlayerDeathEvent event = CraftEventFactory.callPlayerDeathEvent(this, loot, deathmessage, keepInventory);
+        org.bukkit.event.entity.PlayerDeathEvent event = CraftEventFactory.callPlayerDeathEvent(this, loot, PaperAdventure.asAdventure(defaultMessage), defaultMessage.getString(), keepInventory); // Paper - Adventure
 
         // SPIGOT-943 - only call if they have an inventory open
         if (this.containerMenu != this.inventoryMenu) {
             this.closeContainer();
         }
 
-        String deathMessage = event.getDeathMessage();
+        net.kyori.adventure.text.Component deathMessage = event.deathMessage() != null ? event.deathMessage() : net.kyori.adventure.text.Component.empty(); // Paper - Adventure
 
-        if (deathMessage != null && deathMessage.length() > 0 && flag) { // TODO: allow plugins to override?
-            Component ichatbasecomponent;
-            if (deathMessage.equals(deathmessage)) {
-                ichatbasecomponent = this.getCombatTracker().getDeathMessage();
-            } else {
-                ichatbasecomponent = org.bukkit.craftbukkit.util.CraftChatMessage.fromStringOrNull(deathMessage);
-            }
+        if (deathMessage != null && deathMessage != net.kyori.adventure.text.Component.empty() && flag) { // Paper - Adventure // TODO: allow plugins to override?
+            Component ichatbasecomponent = PaperAdventure.asVanilla(deathMessage); // Paper - Adventure
 
             this.connection.send(new ClientboundPlayerCombatKillPacket(this.getCombatTracker(), ichatbasecomponent), PacketSendListener.exceptionallySend(() -> {
                 boolean flag1 = true;
@@ -1729,8 +1727,13 @@ public class ServerPlayer extends Player {
     }
 
     public void sendChatMessage(OutgoingPlayerChatMessage message, boolean filterMaskEnabled, ChatType.Bound params) {
+        // Paper start
+        this.sendChatMessage(message, filterMaskEnabled, params, null);
+    }
+    public void sendChatMessage(OutgoingPlayerChatMessage message, boolean filterMaskEnabled, ChatType.Bound params, @Nullable Component unsigned) {
+        // Paper end
         if (this.acceptsChatMessages()) {
-            message.sendToPlayer(this, filterMaskEnabled, params);
+            message.sendToPlayer(this, filterMaskEnabled, params, unsigned); // Paper
         }
 
     }
@@ -1751,6 +1754,7 @@ public class ServerPlayer extends Player {
     }
 
     public String locale = "en_us"; // CraftBukkit - add, lowercase
+    public java.util.Locale adventure$locale = java.util.Locale.US; // Paper
     public void updateOptions(ServerboundClientInformationPacket packet) {
         // CraftBukkit start
         if (getMainArm() != packet.mainHand()) {
@@ -1762,6 +1766,10 @@ public class ServerPlayer extends Player {
             this.server.server.getPluginManager().callEvent(event);
         }
         this.locale = packet.language;
+        // Paper start
+        this.adventure$locale = net.kyori.adventure.translation.Translator.parseLocale(this.locale);
+        this.connection.connection.channel.attr(PaperAdventure.LOCALE_ATTRIBUTE).set(this.adventure$locale);
+        // Paper end
         this.clientViewDistance = packet.viewDistance;
         // CraftBukkit end
         this.chatVisibility = packet.chatVisibility();
diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
index f63ade8d99295ce9d001aae6f5228a7374e16438..93d02b5de0721e3c5903e80bbf8b3b56ec3ab45d 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -188,6 +188,8 @@ import org.apache.commons.lang3.StringUtils;
 import org.slf4j.Logger;
 
 // CraftBukkit start
+import io.papermc.paper.adventure.ChatProcessor; // Paper
+import io.papermc.paper.adventure.PaperAdventure; // Paper
 import java.util.Arrays;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.atomic.AtomicInteger;
@@ -444,14 +446,17 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
         return this.server.isSingleplayerOwner(this.player.getGameProfile());
     }
 
-    // CraftBukkit start
-    @Deprecated
-    public void disconnect(Component reason) {
-        this.disconnect(CraftChatMessage.fromComponent(reason));
+    public void disconnect(String s) {
+        // Paper start
+        this.disconnect(net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(s));
     }
-    // CraftBukkit end
 
-    public void disconnect(String s) {
+    public void disconnect(final Component reason) {
+        this.disconnect(PaperAdventure.asAdventure(reason));
+    }
+
+    public void disconnect(net.kyori.adventure.text.Component reason) {
+        // Paper end
         // CraftBukkit start - fire PlayerKickEvent
         if (this.processedDisconnect) {
             return;
@@ -460,7 +465,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
             Waitable waitable = new Waitable() {
                 @Override
                 protected Object evaluate() {
-                    ServerGamePacketListenerImpl.this.disconnect(s);
+                    ServerGamePacketListenerImpl.this.disconnect(reason, cause); // Paper - adventure
                     return null;
                 }
             };
@@ -477,9 +482,9 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
             return;
         }
 
-        String leaveMessage = ChatFormatting.YELLOW + this.player.getScoreboardName() + " left the game.";
+        net.kyori.adventure.text.Component leaveMessage = net.kyori.adventure.text.Component.translatable("multiplayer.player.left", net.kyori.adventure.text.format.NamedTextColor.YELLOW, io.papermc.paper.configuration.GlobalConfiguration.get().messages.useDisplayNameInQuitMessage ? this.player.getBukkitEntity().displayName() : net.kyori.adventure.text.Component.text(this.player.getScoreboardName())); // Paper - Adventure
 
-        PlayerKickEvent event = new PlayerKickEvent(this.player.getBukkitEntity(), s, leaveMessage);
+        PlayerKickEvent event = new PlayerKickEvent(this.player.getBukkitEntity(), reason, leaveMessage); // Paper - Adventure
 
         if (this.cserver.getServer().isRunning()) {
             this.cserver.getPluginManager().callEvent(event);
@@ -491,7 +496,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
         }
         this.player.kickLeaveMessage = event.getLeaveMessage(); // CraftBukkit - SPIGOT-3034: Forward leave message to PlayerQuitEvent
         // Send the possibly modified leave message
-        final Component ichatbasecomponent = CraftChatMessage.fromString(event.getReason(), true)[0];
+        final Component ichatbasecomponent = PaperAdventure.asVanilla(event.reason()); // Paper - Adventure
         // CraftBukkit end
 
         this.connection.send(new ClientboundDisconnectPacket(ichatbasecomponent), PacketSendListener.thenRun(() -> {
@@ -1793,9 +1798,11 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
         */
 
         this.player.disconnect();
-        String quitMessage = this.server.getPlayerList().remove(this.player);
-        if ((quitMessage != null) && (quitMessage.length() > 0)) {
-            this.server.getPlayerList().broadcastMessage(CraftChatMessage.fromString(quitMessage));
+        // Paper start - Adventure
+        net.kyori.adventure.text.Component quitMessage = this.server.getPlayerList().remove(this.player);
+        if ((quitMessage != null) && !quitMessage.equals(net.kyori.adventure.text.Component.empty())) {
+            this.server.getPlayerList().broadcastSystemMessage(PaperAdventure.asVanilla(quitMessage), false);
+            // Paper end
         }
         // CraftBukkit end
         this.player.getTextFilter().leave();
@@ -1885,7 +1892,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
                     if (this.verifyChatMessage(playerchatmessage)) {
                         this.chatMessageChain.append(() -> {
                             CompletableFuture<FilteredText> completablefuture = this.filterTextPacket(playerchatmessage.signedContent().plain());
-                            CompletableFuture<PlayerChatMessage> completablefuture1 = this.server.getChatDecorator().decorate(this.player, playerchatmessage);
+                            CompletableFuture<PlayerChatMessage> completablefuture1 = this.server.getChatDecorator().decorate(this.player, null, playerchatmessage); // Paper
 
                             return CompletableFuture.allOf(completablefuture, completablefuture1).thenAcceptAsync((ovoid) -> {
                                 FilterMask filtermask = ((FilteredText) completablefuture.join()).mask();
@@ -2047,7 +2054,12 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
             this.handleCommand(s);
         } else if (this.player.getChatVisibility() == ChatVisiblity.SYSTEM) {
             // Do nothing, this is coming from a plugin
-        } else {
+        // Paper start
+        } else if (true) {
+            final ChatProcessor cp = new ChatProcessor(this.server, this.player, original, async);
+            cp.process();
+            // Paper end
+        } else if (false) { // Paper
             Player player = this.getCraftPlayer();
             AsyncPlayerChatEvent event = new AsyncPlayerChatEvent(async, player, s, new LazyPlayerSet(this.server));
             String originalFormat = event.getFormat(), originalMessage = event.getMessage();
@@ -2180,9 +2192,12 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
     }
 
     private ChatMessageContent getSignedContent(ServerboundChatPacket packet) {
-        Component ichatbasecomponent = this.chatPreviewCache.pull(packet.message());
+        // Paper start
+        final net.minecraft.network.chat.ChatPreviewCache.Result result = this.chatPreviewCache.pullFull(packet.message());
+        Component ichatbasecomponent = result != null ? result.preview() : null;
+        // Paper end
 
-        return packet.signedPreview() && ichatbasecomponent != null ? new ChatMessageContent(packet.message(), ichatbasecomponent) : new ChatMessageContent(packet.message());
+        return packet.signedPreview() && ichatbasecomponent != null ? new ChatMessageContent(packet.message(), ichatbasecomponent, result.decoratorResult()) : new ChatMessageContent(packet.message()); // Paper end
     }
 
     private void broadcastChatMessage(PlayerChatMessage message) {
@@ -2288,14 +2303,17 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
 
     private CompletableFuture<Component> queryChatPreview(String query) {
         MutableComponent ichatmutablecomponent = Component.literal(query);
-        CompletableFuture<Component> completablefuture = this.server.getChatDecorator().decorate(this.player, (Component) ichatmutablecomponent).thenApply((ichatbasecomponent) -> {
-            return !ichatmutablecomponent.equals(ichatbasecomponent) ? ichatbasecomponent : null;
+        // Paper start
+        final CompletableFuture<net.minecraft.network.chat.ChatDecorator.Result> result = this.server.getChatDecorator().decorate(this.player, null, ichatmutablecomponent, true);
+        CompletableFuture<net.minecraft.network.chat.ChatDecorator.Result> completablefuture = result.thenApply((res) -> {
+            return !ichatmutablecomponent.equals(res.component()) ? res : null;
+            // Paper end
         });
 
         completablefuture.thenAcceptAsync((ichatbasecomponent) -> {
-            this.chatPreviewCache.set(query, ichatbasecomponent);
+            if (ichatbasecomponent != null) this.chatPreviewCache.set(query, ichatbasecomponent); // Paper
         }, this.server);
-        return completablefuture;
+        return completablefuture.thenApply(net.minecraft.network.chat.ChatDecorator.Result::component); // paper
     }
 
     private CompletableFuture<Component> queryCommandPreview(String query) {
@@ -2304,7 +2322,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
         CompletableFuture<Component> completablefuture = this.getPreviewedArgument(commandlistenerwrapper, PreviewableCommand.of(parseresults));
 
         completablefuture.thenAcceptAsync((ichatbasecomponent) -> {
-            this.chatPreviewCache.set(query, ichatbasecomponent);
+            if (ichatbasecomponent != null) this.chatPreviewCache.set(query, ichatbasecomponent); // Paper
         }, this.server);
         return completablefuture;
     }
@@ -3094,30 +3112,30 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
                 return;
             }
 
-            // CraftBukkit start
+            // CraftBukkit start // Paper start - Adventure
             Player player = this.player.getBukkitEntity();
             int x = packet.getPos().getX();
             int y = packet.getPos().getY();
             int z = packet.getPos().getZ();
-            String[] lines = new String[4];
+            List<net.kyori.adventure.text.Component> lines = new java.util.ArrayList<>();
 
             for (int i = 0; i < signText.size(); ++i) {
                 FilteredText filteredtext = (FilteredText) signText.get(i);
 
                 if (this.player.isTextFilteringEnabled()) {
-                    lines[i] = ChatFormatting.stripFormatting(filteredtext.filteredOrEmpty());
+                    lines.add(net.kyori.adventure.text.Component.text(filteredtext.filteredOrEmpty())); // Paper - adventure
                 } else {
-                    lines[i] = ChatFormatting.stripFormatting(filteredtext.raw());
+                    lines.add(net.kyori.adventure.text.Component.text(filteredtext.raw())); // Paper - adventure
                 }
             }
             SignChangeEvent event = new SignChangeEvent((org.bukkit.craftbukkit.block.CraftBlock) player.getWorld().getBlockAt(x, y, z), this.player.getBukkitEntity(), lines);
             this.cserver.getPluginManager().callEvent(event);
 
             if (!event.isCancelled()) {
-                Component[] components = org.bukkit.craftbukkit.block.CraftSign.sanitizeLines(event.getLines());
-                for (int i = 0; i < components.length; i++) {
-                    tileentitysign.setMessage(i, components[i]);
+                for (int i = 0; i < 4; i++) {
+                    tileentitysign.setMessage(i, PaperAdventure.asVanilla(event.line(i)));
                 }
+                // Paper end
                 tileentitysign.isEditable = false;
             }
             // CraftBukkit end
diff --git a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
index 4fe70fee37685c3011e8212d6d47fee19da87824..bcf189d0ae917b99fff62167740ddb0012082138 100644
--- a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
@@ -363,7 +363,7 @@ public class ServerLoginPacketListenerImpl implements TickablePacketListener, Se
                         if (PlayerPreLoginEvent.getHandlerList().getRegisteredListeners().length != 0) {
                             final PlayerPreLoginEvent event = new PlayerPreLoginEvent(playerName, address, uniqueId);
                             if (asyncEvent.getResult() != PlayerPreLoginEvent.Result.ALLOWED) {
-                                event.disallow(asyncEvent.getResult(), asyncEvent.getKickMessage());
+                                event.disallow(asyncEvent.getResult(), asyncEvent.kickMessage()); // Paper - Adventure
                             }
                             Waitable<PlayerPreLoginEvent.Result> waitable = new Waitable<PlayerPreLoginEvent.Result>() {
                                 @Override
@@ -374,12 +374,12 @@ public class ServerLoginPacketListenerImpl implements TickablePacketListener, Se
 
                             ServerLoginPacketListenerImpl.this.server.processQueue.add(waitable);
                             if (waitable.get() != PlayerPreLoginEvent.Result.ALLOWED) {
-                                ServerLoginPacketListenerImpl.this.disconnect(event.getKickMessage());
+                                ServerLoginPacketListenerImpl.this.disconnect(io.papermc.paper.adventure.PaperAdventure.asVanilla(event.kickMessage())); // Paper - Adventure
                                 return;
                             }
                         } else {
                             if (asyncEvent.getLoginResult() != AsyncPlayerPreLoginEvent.Result.ALLOWED) {
-                                ServerLoginPacketListenerImpl.this.disconnect(asyncEvent.getKickMessage());
+                                ServerLoginPacketListenerImpl.this.disconnect(io.papermc.paper.adventure.PaperAdventure.asVanilla(asyncEvent.kickMessage())); // Paper - Adventure
                                 return;
                             }
                         }
diff --git a/src/main/java/net/minecraft/server/network/ServerStatusPacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerStatusPacketListenerImpl.java
index 3a587073dbe5e8a599d342c5f758d842b7b6cddb..a426adfba3fccf1815177e0b8065684c9497ef45 100644
--- a/src/main/java/net/minecraft/server/network/ServerStatusPacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerStatusPacketListenerImpl.java
@@ -54,7 +54,7 @@ public class ServerStatusPacketListenerImpl implements ServerStatusPacketListene
                 CraftIconCache icon = server.server.getServerIcon();
 
                 ServerListPingEvent() {
-                    super(((InetSocketAddress) ServerStatusPacketListenerImpl.this.connection.getRemoteAddress()).getAddress(), ServerStatusPacketListenerImpl.this.server.getMotd(), ServerStatusPacketListenerImpl.this.server.previewsChat(), ServerStatusPacketListenerImpl.this.server.getPlayerList().getMaxPlayers());
+                    super(((InetSocketAddress) ServerStatusPacketListenerImpl.this.connection.getRemoteAddress()).getAddress(), ServerStatusPacketListenerImpl.this.server.server.getMotd(), ServerStatusPacketListenerImpl.this.server.previewsChat(), ServerStatusPacketListenerImpl.this.server.getPlayerList().getMaxPlayers()); // Paper - Adventure
                 }
 
                 @Override
diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java
index 6987bee4bf2c1f3d47ffdd5329f6c0c63a2962a5..521f485366c65527ac3289dd27d8f2e311706a10 100644
--- a/src/main/java/net/minecraft/server/players/PlayerList.java
+++ b/src/main/java/net/minecraft/server/players/PlayerList.java
@@ -8,6 +8,7 @@ import com.mojang.logging.LogUtils;
 import com.mojang.serialization.DataResult;
 import com.mojang.serialization.Dynamic;
 import io.netty.buffer.Unpooled;
+import io.papermc.paper.adventure.PaperAdventure;
 import java.io.File;
 import java.net.SocketAddress;
 import java.nio.file.Path;
@@ -264,7 +265,7 @@ public abstract class PlayerList {
         }
         // CraftBukkit start
         ichatmutablecomponent.withStyle(ChatFormatting.YELLOW);
-        String joinMessage = CraftChatMessage.fromComponent(ichatmutablecomponent);
+        Component joinMessage = ichatmutablecomponent; // Paper - Adventure
 
         playerconnection.teleport(player.getX(), player.getY(), player.getZ(), player.getYRot(), player.getXRot());
         this.players.add(player);
@@ -278,19 +279,18 @@ public abstract class PlayerList {
         // Ensure that player inventory is populated with its viewer
         player.containerMenu.transferTo(player.containerMenu, bukkitPlayer);
 
-        PlayerJoinEvent playerJoinEvent = new PlayerJoinEvent(bukkitPlayer, joinMessage);
+        PlayerJoinEvent playerJoinEvent = new PlayerJoinEvent(bukkitPlayer, PaperAdventure.asAdventure(ichatmutablecomponent)); // Paper - Adventure
         this.cserver.getPluginManager().callEvent(playerJoinEvent);
 
         if (!player.connection.connection.isConnected()) {
             return;
         }
 
-        joinMessage = playerJoinEvent.getJoinMessage();
+        final net.kyori.adventure.text.Component jm = playerJoinEvent.joinMessage();
 
-        if (joinMessage != null && joinMessage.length() > 0) {
-            for (Component line : org.bukkit.craftbukkit.util.CraftChatMessage.fromString(joinMessage)) {
-                this.server.getPlayerList().broadcastSystemMessage(line, false);
-            }
+        if (jm != null && !jm.equals(net.kyori.adventure.text.Component.empty())) { // Paper - Adventure
+            joinMessage = PaperAdventure.asVanilla(jm); // Paper - Adventure
+            this.server.getPlayerList().broadcastSystemMessage(joinMessage, false); // Paper - Adventure
         }
         // CraftBukkit end
 
@@ -487,7 +487,7 @@ public abstract class PlayerList {
 
     }
 
-    public String remove(ServerPlayer entityplayer) { // CraftBukkit - return string
+    public net.kyori.adventure.text.Component remove(ServerPlayer entityplayer) { // Paper - return Component
         ServerLevel worldserver = entityplayer.getLevel();
 
         entityplayer.awardStat(Stats.LEAVE_GAME);
@@ -498,7 +498,7 @@ public abstract class PlayerList {
             entityplayer.closeContainer();
         }
 
-        PlayerQuitEvent playerQuitEvent = new PlayerQuitEvent(entityplayer.getBukkitEntity(), entityplayer.kickLeaveMessage != null ? entityplayer.kickLeaveMessage : "\u00A7e" + entityplayer.getScoreboardName() + " left the game");
+        PlayerQuitEvent playerQuitEvent = new PlayerQuitEvent(entityplayer.getBukkitEntity(), net.kyori.adventure.text.Component.translatable("multiplayer.player.left", net.kyori.adventure.text.format.NamedTextColor.YELLOW, io.papermc.paper.configuration.GlobalConfiguration.get().messages.useDisplayNameInQuitMessage ? entityplayer.getBukkitEntity().displayName() : net.kyori.adventure.text.Component.text(entityplayer.getScoreboardName())));
         this.cserver.getPluginManager().callEvent(playerQuitEvent);
         entityplayer.getBukkitEntity().disconnect(playerQuitEvent.getQuitMessage());
 
@@ -551,7 +551,7 @@ public abstract class PlayerList {
         this.cserver.getScoreboardManager().removePlayer(entityplayer.getBukkitEntity());
         // CraftBukkit end
 
-        return playerQuitEvent.getQuitMessage(); // CraftBukkit
+        return playerQuitEvent.quitMessage(); // Paper - Adventure
     }
 
     // CraftBukkit start - Whole method, SocketAddress to LoginListener, added hostname to signature, return EntityPlayer
@@ -597,10 +597,10 @@ public abstract class PlayerList {
             }
 
             // return chatmessage;
-            event.disallow(PlayerLoginEvent.Result.KICK_BANNED, CraftChatMessage.fromComponent(ichatmutablecomponent));
+            event.disallow(PlayerLoginEvent.Result.KICK_BANNED, PaperAdventure.asAdventure(ichatmutablecomponent)); // Paper - Adventure
         } else if (!this.isWhiteListed(gameprofile)) {
             ichatmutablecomponent = Component.translatable("multiplayer.disconnect.not_whitelisted");
-            event.disallow(PlayerLoginEvent.Result.KICK_WHITELIST, org.spigotmc.SpigotConfig.whitelistMessage); // Spigot
+            event.disallow(PlayerLoginEvent.Result.KICK_WHITELIST, net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(org.spigotmc.SpigotConfig.whitelistMessage)); // Spigot // Paper - Adventure
         } else if (this.getIpBans().isBanned(socketaddress) && !this.getIpBans().get(socketaddress).hasExpired()) {
             IpBanListEntry ipbanentry = this.ipBans.get(socketaddress);
 
@@ -610,17 +610,17 @@ public abstract class PlayerList {
             }
 
             // return chatmessage;
-            event.disallow(PlayerLoginEvent.Result.KICK_BANNED, CraftChatMessage.fromComponent(ichatmutablecomponent));
+            event.disallow(PlayerLoginEvent.Result.KICK_BANNED, PaperAdventure.asAdventure(ichatmutablecomponent)); // Paper - Adventure
         } else {
             // return this.players.size() >= this.maxPlayers && !this.canBypassPlayerLimit(gameprofile) ? IChatBaseComponent.translatable("multiplayer.disconnect.server_full") : null;
             if (this.players.size() >= this.maxPlayers && !this.canBypassPlayerLimit(gameprofile)) {
-                event.disallow(PlayerLoginEvent.Result.KICK_FULL, org.spigotmc.SpigotConfig.serverFullMessage); // Spigot
+                event.disallow(PlayerLoginEvent.Result.KICK_FULL, net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(org.spigotmc.SpigotConfig.serverFullMessage)); // Spigot // Paper - Adventure
             }
         }
 
         this.cserver.getPluginManager().callEvent(event);
         if (event.getResult() != PlayerLoginEvent.Result.ALLOWED) {
-            loginlistener.disconnect(event.getKickMessage());
+            loginlistener.disconnect(PaperAdventure.asVanilla(event.kickMessage())); // Paper - Adventure
             return null;
         }
         return entity;
@@ -1128,7 +1128,7 @@ public abstract class PlayerList {
     public void removeAll() {
         // CraftBukkit start - disconnect safely
         for (ServerPlayer player : this.players) {
-            player.connection.disconnect(this.server.server.getShutdownMessage()); // CraftBukkit - add custom shutdown message
+            player.connection.disconnect(this.server.server.shutdownMessage()); // CraftBukkit - add custom shutdown message // Paper - Adventure
         }
         // CraftBukkit end
 
@@ -1169,14 +1169,25 @@ public abstract class PlayerList {
     }
 
     public void broadcastChatMessage(PlayerChatMessage message, ServerPlayer sender, ChatType.Bound params) {
+        // Paper start
+        this.broadcastChatMessage(message, sender, params, null);
+    }
+    public void broadcastChatMessage(PlayerChatMessage message, ServerPlayer sender, ChatType.Bound params, @Nullable Function<net.kyori.adventure.audience.Audience, Component> unsignedFunction) {
+        // Paper end
         Objects.requireNonNull(sender);
-        this.broadcastChatMessage(message, sender::shouldFilterMessageTo, sender, sender.asChatSender(), params);
+        this.broadcastChatMessage(message, sender::shouldFilterMessageTo, sender, sender.asChatSender(), params, unsignedFunction); // Paper
     }
 
     private void broadcastChatMessage(PlayerChatMessage message, Predicate<ServerPlayer> shouldSendFiltered, @Nullable ServerPlayer sender, ChatSender sourceProfile, ChatType.Bound params) {
+        // Paper start
+        this.broadcastChatMessage(message, shouldSendFiltered, sender, sourceProfile, params, null);
+    }
+
+    private void broadcastChatMessage(PlayerChatMessage message, Predicate<ServerPlayer> shouldSendFiltered, @Nullable ServerPlayer sender, ChatSender sourceProfile, ChatType.Bound params, @Nullable Function<net.kyori.adventure.audience.Audience, Component> unsignedFunction) {
+        // Paper end
         boolean flag = this.verifyChatTrusted(message, sourceProfile);
 
-        this.server.logChatMessage(message.serverContent(), params, flag ? null : "Not Secure");
+        this.server.logChatMessage((unsignedFunction == null ? message : message.withUnsignedContent(unsignedFunction.apply(this.server.console))).serverContent(), params, flag ? null : "Not Secure"); // Paper
         OutgoingPlayerChatMessage outgoingplayerchatmessage = OutgoingPlayerChatMessage.create(message);
         boolean flag1 = message.isFullyFiltered();
         boolean flag2 = false;
@@ -1186,7 +1197,7 @@ public abstract class PlayerList {
             ServerPlayer entityplayer1 = (ServerPlayer) iterator.next();
             boolean flag3 = shouldSendFiltered.test(entityplayer1);
 
-            entityplayer1.sendChatMessage(outgoingplayerchatmessage, flag3, params);
+            entityplayer1.sendChatMessage(outgoingplayerchatmessage, flag3, params, unsignedFunction == null ? null : unsignedFunction.apply(entityplayer1.getBukkitEntity())); // Paper
             if (sender != entityplayer1) {
                 flag2 |= flag1 && flag3;
             }
@@ -1213,7 +1224,7 @@ public abstract class PlayerList {
 
     }
 
-    private boolean verifyChatTrusted(PlayerChatMessage message, ChatSender profile) {
+    public boolean verifyChatTrusted(PlayerChatMessage message, ChatSender profile) { // Paper - private -> public
         return !message.hasExpiredServer(Instant.now()) && message.verify(profile);
     }
 
diff --git a/src/main/java/net/minecraft/world/BossEvent.java b/src/main/java/net/minecraft/world/BossEvent.java
index 4c62df5a3781ec9df4a5c5f1b528649e6e8a62d1..affd1b8c7589ba59330dc0b6fc803cce4ee57397 100644
--- a/src/main/java/net/minecraft/world/BossEvent.java
+++ b/src/main/java/net/minecraft/world/BossEvent.java
@@ -13,6 +13,7 @@ public abstract class BossEvent {
     protected boolean darkenScreen;
     protected boolean playBossMusic;
     protected boolean createWorldFog;
+    public net.kyori.adventure.bossbar.BossBar adventure; // Paper
 
     public BossEvent(UUID uuid, Component name, BossEvent.BossBarColor color, BossEvent.BossBarOverlay style) {
         this.id = uuid;
@@ -27,61 +28,75 @@ public abstract class BossEvent {
     }
 
     public Component getName() {
+        if (this.adventure != null) return io.papermc.paper.adventure.PaperAdventure.asVanilla(this.adventure.name()); // Paper
         return this.name;
     }
 
     public void setName(Component name) {
+        if (this.adventure != null) this.adventure.name(io.papermc.paper.adventure.PaperAdventure.asAdventure(name)); // Paper
         this.name = name;
     }
 
     public float getProgress() {
+        if (this.adventure != null) return this.adventure.progress(); // Paper
         return this.progress;
     }
 
     public void setProgress(float percent) {
+        if (this.adventure != null) this.adventure.progress(percent); // Paper
         this.progress = percent;
     }
 
     public BossEvent.BossBarColor getColor() {
+        if (this.adventure != null) return io.papermc.paper.adventure.PaperAdventure.asVanilla(this.adventure.color()); // Paper
         return this.color;
     }
 
     public void setColor(BossEvent.BossBarColor color) {
+        if (this.adventure != null) this.adventure.color(io.papermc.paper.adventure.PaperAdventure.asAdventure(color)); // Paper
         this.color = color;
     }
 
     public BossEvent.BossBarOverlay getOverlay() {
+        if (this.adventure != null) return io.papermc.paper.adventure.PaperAdventure.asVanilla(this.adventure.overlay()); // Paper
         return this.overlay;
     }
 
     public void setOverlay(BossEvent.BossBarOverlay style) {
+        if (this.adventure != null) this.adventure.overlay(io.papermc.paper.adventure.PaperAdventure.asAdventure(style)); // Paper
         this.overlay = style;
     }
 
     public boolean shouldDarkenScreen() {
+        if (this.adventure != null) return this.adventure.hasFlag(net.kyori.adventure.bossbar.BossBar.Flag.DARKEN_SCREEN); // Paper
         return this.darkenScreen;
     }
 
     public BossEvent setDarkenScreen(boolean darkenSky) {
+        if (this.adventure != null) io.papermc.paper.adventure.PaperAdventure.setFlag(this.adventure, net.kyori.adventure.bossbar.BossBar.Flag.DARKEN_SCREEN, darkenSky); // Paper
         this.darkenScreen = darkenSky;
         return this;
     }
 
     public boolean shouldPlayBossMusic() {
+        if (this.adventure != null) return this.adventure.hasFlag(net.kyori.adventure.bossbar.BossBar.Flag.PLAY_BOSS_MUSIC); // Paper
         return this.playBossMusic;
     }
 
     public BossEvent setPlayBossMusic(boolean dragonMusic) {
+        if (this.adventure != null) io.papermc.paper.adventure.PaperAdventure.setFlag(this.adventure, net.kyori.adventure.bossbar.BossBar.Flag.PLAY_BOSS_MUSIC, dragonMusic); // Paper
         this.playBossMusic = dragonMusic;
         return this;
     }
 
     public BossEvent setCreateWorldFog(boolean thickenFog) {
+        if (this.adventure != null) io.papermc.paper.adventure.PaperAdventure.setFlag(this.adventure, net.kyori.adventure.bossbar.BossBar.Flag.CREATE_WORLD_FOG, thickenFog); // Paper
         this.createWorldFog = thickenFog;
         return this;
     }
 
     public boolean shouldCreateWorldFog() {
+        if (this.adventure != null) return this.adventure.hasFlag(net.kyori.adventure.bossbar.BossBar.Flag.CREATE_WORLD_FOG); // Paper
         return this.createWorldFog;
     }
 
diff --git a/src/main/java/net/minecraft/world/level/saveddata/maps/MapItemSavedData.java b/src/main/java/net/minecraft/world/level/saveddata/maps/MapItemSavedData.java
index 595b56b2ab9a813ba71399d306117294fa90dc65..3527d40102d512d0e276edc969ea3c189aa34ec2 100644
--- a/src/main/java/net/minecraft/world/level/saveddata/maps/MapItemSavedData.java
+++ b/src/main/java/net/minecraft/world/level/saveddata/maps/MapItemSavedData.java
@@ -33,6 +33,7 @@ import net.minecraft.world.level.saveddata.SavedData;
 import org.slf4j.Logger;
 
 // CraftBukkit start
+import io.papermc.paper.adventure.PaperAdventure; // Paper
 import java.util.UUID;
 import org.bukkit.Bukkit;
 import org.bukkit.craftbukkit.CraftServer;
@@ -598,7 +599,7 @@ public class MapItemSavedData extends SavedData {
 
                 for (org.bukkit.map.MapCursor cursor : render.cursors) {
                     if (cursor.isVisible()) {
-                        icons.add(new MapDecoration(MapDecoration.Type.byIcon(cursor.getRawType()), cursor.getX(), cursor.getY(), cursor.getDirection(), CraftChatMessage.fromStringOrNull(cursor.getCaption())));
+                        icons.add(new MapDecoration(MapDecoration.Type.byIcon(cursor.getRawType()), cursor.getX(), cursor.getY(), cursor.getDirection(), PaperAdventure.asVanilla(cursor.caption()))); // Paper - Adventure
                     }
                 }
                 collection = icons;
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
index 4dd952faac05f553b28d1252296b0587369865f4..6139a06453e370865889f47644a6840fce2934f2 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
@@ -592,8 +592,10 @@ public final class CraftServer implements Server {
     }
 
     @Override
+    @Deprecated // Paper start
     public int broadcastMessage(String message) {
         return this.broadcast(message, BROADCAST_CHANNEL_USERS);
+        // Paper end
     }
 
     @Override
@@ -1413,7 +1415,15 @@ public final class CraftServer implements Server {
         return this.configuration.getInt("settings.spawn-radius", -1);
     }
 
+    // Paper start
+    @Override
+    public net.kyori.adventure.text.Component shutdownMessage() {
+        String msg = getShutdownMessage();
+        return msg != null ? net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(msg) : null;
+    }
+    // Paper end
     @Override
+    @Deprecated // Paper
     public String getShutdownMessage() {
         return this.configuration.getString("settings.shutdown-message");
     }
@@ -1581,7 +1591,20 @@ public final class CraftServer implements Server {
     }
 
     @Override
+    @Deprecated // Paper
     public int broadcast(String message, String permission) {
+        // Paper start - Adventure
+        return this.broadcast(net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(message), permission);
+    }
+
+    @Override
+    public int broadcast(net.kyori.adventure.text.Component message) {
+        return this.broadcast(message, BROADCAST_CHANNEL_USERS);
+    }
+
+    @Override
+    public int broadcast(net.kyori.adventure.text.Component message, String permission) {
+        // Paper end
         Set<CommandSender> recipients = new HashSet<>();
         for (Permissible permissible : this.getPluginManager().getPermissionSubscriptions(permission)) {
             if (permissible instanceof CommandSender && permissible.hasPermission(permission)) {
@@ -1589,14 +1612,14 @@ public final class CraftServer implements Server {
             }
         }
 
-        BroadcastMessageEvent broadcastMessageEvent = new BroadcastMessageEvent(!Bukkit.isPrimaryThread(), message, recipients);
+        BroadcastMessageEvent broadcastMessageEvent = new BroadcastMessageEvent(!Bukkit.isPrimaryThread(), message, recipients); // Paper - Adventure
         this.getPluginManager().callEvent(broadcastMessageEvent);
 
         if (broadcastMessageEvent.isCancelled()) {
             return 0;
         }
 
-        message = broadcastMessageEvent.getMessage();
+        message = broadcastMessageEvent.message(); // Paper - Adventure
 
         for (CommandSender recipient : recipients) {
             recipient.sendMessage(message);
@@ -1847,6 +1870,14 @@ public final class CraftServer implements Server {
         return CraftInventoryCreator.INSTANCE.createInventory(owner, type);
     }
 
+    // Paper start
+    @Override
+    public Inventory createInventory(InventoryHolder owner, InventoryType type, net.kyori.adventure.text.Component title) {
+        Validate.isTrue(type.isCreatable(), "Cannot open an inventory of type ", type);
+        return CraftInventoryCreator.INSTANCE.createInventory(owner, type, title);
+    }
+    // Paper end
+
     @Override
     public Inventory createInventory(InventoryHolder owner, InventoryType type, String title) {
         Validate.isTrue(type.isCreatable(), "Cannot open an inventory of type ", type);
@@ -1859,13 +1890,28 @@ public final class CraftServer implements Server {
         return CraftInventoryCreator.INSTANCE.createInventory(owner, size);
     }
 
+    // Paper start
+    @Override
+    public Inventory createInventory(InventoryHolder owner, int size, net.kyori.adventure.text.Component title) throws IllegalArgumentException {
+        Validate.isTrue(9 <= size && size <= 54 && size % 9 == 0, "Size for custom inventory must be a multiple of 9 between 9 and 54 slots (got " + size + ")");
+        return CraftInventoryCreator.INSTANCE.createInventory(owner, size, title);
+    }
+    // Paper end
+
     @Override
     public Inventory createInventory(InventoryHolder owner, int size, String title) throws IllegalArgumentException {
         Validate.isTrue(9 <= size && size <= 54 && size % 9 == 0, "Size for custom inventory must be a multiple of 9 between 9 and 54 slots (got " + size + ")");
         return CraftInventoryCreator.INSTANCE.createInventory(owner, size, title);
     }
 
+    // Paper start
+    @Override
+    public Merchant createMerchant(net.kyori.adventure.text.Component title) {
+        return new org.bukkit.craftbukkit.inventory.CraftMerchantCustom(title == null ? InventoryType.MERCHANT.defaultTitle() : title);
+    }
+    // Paper end
     @Override
+    @Deprecated // Paper
     public Merchant createMerchant(String title) {
         return new CraftMerchantCustom(title == null ? InventoryType.MERCHANT.getDefaultTitle() : title);
     }
@@ -1930,6 +1976,12 @@ public final class CraftServer implements Server {
         return Thread.currentThread().equals(console.serverThread) || this.console.hasStopped() || !org.spigotmc.AsyncCatcher.enabled; // All bets are off if we have shut down (e.g. due to watchdog)
     }
 
+    // Paper start
+    @Override
+    public net.kyori.adventure.text.Component motd() {
+        return console.getComponentMotd();
+    }
+    // Paper end
     @Override
     public String getMotd() {
         return this.console.getMotd();
@@ -2357,4 +2409,15 @@ public final class CraftServer implements Server {
         return this.spigot;
     }
     // Spigot end
+
+    // Paper start
+    private Iterable<? extends net.kyori.adventure.audience.Audience> adventure$audiences;
+    @Override
+    public Iterable<? extends net.kyori.adventure.audience.Audience> audiences() {
+        if (this.adventure$audiences == null) {
+            this.adventure$audiences = com.google.common.collect.Iterables.concat(java.util.Collections.singleton(this.getConsoleSender()), this.getOnlinePlayers());
+        }
+        return this.adventure$audiences;
+    }
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
index 6d9469d577dcbb9d5b5b703cf47c8863e0b43b13..9a6820b10e4164cc38d269853b5c2a49175cb890 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -150,6 +150,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
     private final BlockMetadataStore blockMetadata = new BlockMetadataStore(this);
     private final Object2IntOpenHashMap<SpawnCategory> spawnCategoryLimit = new Object2IntOpenHashMap<>();
     private final CraftPersistentDataContainer persistentDataContainer = new CraftPersistentDataContainer(CraftWorld.DATA_TYPE_REGISTRY);
+    private net.kyori.adventure.pointer.Pointers adventure$pointers; // Paper - implement pointers
 
     private static final Random rand = new Random();
 
@@ -1970,5 +1971,18 @@ public class CraftWorld extends CraftRegionAccessor implements World {
 
         return ret;
     }
+
+    // Paper start - implement pointers
+    @Override
+    public net.kyori.adventure.pointer.Pointers pointers() {
+        if (this.adventure$pointers == null) {
+            this.adventure$pointers = net.kyori.adventure.pointer.Pointers.builder()
+                .withDynamic(net.kyori.adventure.identity.Identity.NAME, this::getName)
+                .withDynamic(net.kyori.adventure.identity.Identity.UUID, this::getUID)
+                .build();
+        }
+
+        return this.adventure$pointers;
+    }
     // Paper end
 }
diff --git a/src/main/java/org/bukkit/craftbukkit/Main.java b/src/main/java/org/bukkit/craftbukkit/Main.java
index d3a5641e84d5b761ebd932a79869a288e2044f4e..ef0d91e72e4ffb829b976da44a5cfe4eedc8703a 100644
--- a/src/main/java/org/bukkit/craftbukkit/Main.java
+++ b/src/main/java/org/bukkit/craftbukkit/Main.java
@@ -19,6 +19,12 @@ public class Main {
     public static boolean useConsole = true;
 
     public static void main(String[] args) {
+        // Paper start
+        final String warnWhenLegacyFormattingDetected = String.join(".", "net", "kyori", "adventure", "text", "warnWhenLegacyFormattingDetected");
+        if (false && System.getProperty(warnWhenLegacyFormattingDetected) == null) {
+            System.setProperty(warnWhenLegacyFormattingDetected, String.valueOf(true));
+        }
+        // Paper end
         // Todo: Installation script
         OptionParser parser = new OptionParser() {
             {
diff --git a/src/main/java/org/bukkit/craftbukkit/block/CraftBeacon.java b/src/main/java/org/bukkit/craftbukkit/block/CraftBeacon.java
index 9d55f36f146435f0cfb4e62ffa7c94eab404a596..c186a44b927188ed222f8b2f8f76aaef35d9c654 100644
--- a/src/main/java/org/bukkit/craftbukkit/block/CraftBeacon.java
+++ b/src/main/java/org/bukkit/craftbukkit/block/CraftBeacon.java
@@ -68,6 +68,19 @@ public class CraftBeacon extends CraftBlockEntityState<BeaconBlockEntity> implem
         this.getSnapshot().secondaryPower = (effect != null) ? MobEffect.byId(effect.getId()) : null;
     }
 
+    // Paper start
+    @Override
+    public net.kyori.adventure.text.Component customName() {
+        final BeaconBlockEntity be = this.getSnapshot();
+        return be.name != null ? io.papermc.paper.adventure.PaperAdventure.asAdventure(be.name) : null;
+    }
+
+    @Override
+    public void customName(final net.kyori.adventure.text.Component customName) {
+        this.getSnapshot().setCustomName(customName != null ? io.papermc.paper.adventure.PaperAdventure.asVanilla(customName) : null);
+    }
+    // Paper end
+
     @Override
     public String getCustomName() {
         BeaconBlockEntity beacon = this.getSnapshot();
diff --git a/src/main/java/org/bukkit/craftbukkit/block/CraftCommandBlock.java b/src/main/java/org/bukkit/craftbukkit/block/CraftCommandBlock.java
index 02fc6b189541fdedd0acef6700722eb7e53346c4..c4ea6760f489e6171f9e6e170160b932597f842f 100644
--- a/src/main/java/org/bukkit/craftbukkit/block/CraftCommandBlock.java
+++ b/src/main/java/org/bukkit/craftbukkit/block/CraftCommandBlock.java
@@ -30,4 +30,16 @@ public class CraftCommandBlock extends CraftBlockEntityState<CommandBlockEntity>
     public void setName(String name) {
         getSnapshot().getCommandBlock().setName(CraftChatMessage.fromStringOrNull(name != null ? name : "@"));
     }
+
+    // Paper start
+    @Override
+    public net.kyori.adventure.text.Component name() {
+        return io.papermc.paper.adventure.PaperAdventure.asAdventure(getSnapshot().getCommandBlock().getName());
+    }
+
+    @Override
+    public void name(net.kyori.adventure.text.Component name) {
+        getSnapshot().getCommandBlock().setName(name == null ? net.minecraft.network.chat.Component.literal("@") : io.papermc.paper.adventure.PaperAdventure.asVanilla(name));
+    }
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/craftbukkit/block/CraftContainer.java b/src/main/java/org/bukkit/craftbukkit/block/CraftContainer.java
index 05f37f306d623280823c7cf9516027189659f902..65104a0506131373b6b33433a118c7e1cd3696dc 100644
--- a/src/main/java/org/bukkit/craftbukkit/block/CraftContainer.java
+++ b/src/main/java/org/bukkit/craftbukkit/block/CraftContainer.java
@@ -27,6 +27,19 @@ public abstract class CraftContainer<T extends BaseContainerBlockEntity> extends
         this.getSnapshot().lockKey = (key == null) ? LockCode.NO_LOCK : new LockCode(key);
     }
 
+    // Paper start
+    @Override
+    public net.kyori.adventure.text.Component customName() {
+        final T be = this.getSnapshot();
+        return be.hasCustomName() ? io.papermc.paper.adventure.PaperAdventure.asAdventure(be.getCustomName()) : null;
+    }
+
+    @Override
+    public void customName(final net.kyori.adventure.text.Component customName) {
+        this.getSnapshot().setCustomName(customName != null ? io.papermc.paper.adventure.PaperAdventure.asVanilla(customName) : null);
+    }
+    // Paper end
+
     @Override
     public String getCustomName() {
         T container = this.getSnapshot();
diff --git a/src/main/java/org/bukkit/craftbukkit/block/CraftEnchantingTable.java b/src/main/java/org/bukkit/craftbukkit/block/CraftEnchantingTable.java
index 0beb96dc896f63003e1b1ae458b73902bdbe648a..102eb86bad3000f258775ac06ecd1a6dad174b0a 100644
--- a/src/main/java/org/bukkit/craftbukkit/block/CraftEnchantingTable.java
+++ b/src/main/java/org/bukkit/craftbukkit/block/CraftEnchantingTable.java
@@ -11,6 +11,19 @@ public class CraftEnchantingTable extends CraftBlockEntityState<EnchantmentTable
         super(world, tileEntity);
     }
 
+    // Paper start
+    @Override
+    public net.kyori.adventure.text.Component customName() {
+        final EnchantmentTableBlockEntity be = this.getSnapshot();
+        return be.hasCustomName() ? io.papermc.paper.adventure.PaperAdventure.asAdventure(be.getCustomName()) : null;
+    }
+
+    @Override
+    public void customName(final net.kyori.adventure.text.Component customName) {
+        this.getSnapshot().setCustomName(customName != null ? io.papermc.paper.adventure.PaperAdventure.asVanilla(customName) : null);
+    }
+    // Paper end
+
     @Override
     public String getCustomName() {
         EnchantmentTableBlockEntity enchant = this.getSnapshot();
diff --git a/src/main/java/org/bukkit/craftbukkit/block/CraftSign.java b/src/main/java/org/bukkit/craftbukkit/block/CraftSign.java
index 3f5292deeeddb8a6a5df57aac01f48ba11be6d7c..911843bf38ab750edd4a63417ba7a9deb6b64cb1 100644
--- a/src/main/java/org/bukkit/craftbukkit/block/CraftSign.java
+++ b/src/main/java/org/bukkit/craftbukkit/block/CraftSign.java
@@ -13,34 +13,60 @@ import org.bukkit.entity.Player;
 public class CraftSign extends CraftBlockEntityState<SignBlockEntity> implements Sign {
 
     // Lazily initialized only if requested:
-    private String[] originalLines = null;
-    private String[] lines = null;
+    // Paper start
+    private java.util.ArrayList<net.kyori.adventure.text.Component> originalLines = null; // ArrayList for RandomAccess
+    private java.util.ArrayList<net.kyori.adventure.text.Component> lines = null; // ArrayList for RandomAccess
+    // Paper end
 
     public CraftSign(World world, SignBlockEntity tileEntity) {
         super(world, tileEntity);
     }
 
+    // Paper start
     @Override
-    public String[] getLines() {
-        if (this.lines == null) {
-            // Lazy initialization:
-            SignBlockEntity sign = this.getSnapshot();
-            this.lines = new String[sign.messages.length];
-            System.arraycopy(CraftSign.revertComponents(sign.messages), 0, lines, 0, lines.length);
-            this.originalLines = new String[lines.length];
-            System.arraycopy(lines, 0, originalLines, 0, originalLines.length);
-        }
+    public java.util.List<net.kyori.adventure.text.Component> lines() {
+        this.loadLines();
         return this.lines;
     }
 
+    @Override
+    public net.kyori.adventure.text.Component line(int index) {
+        this.loadLines();
+        return this.lines.get(index);
+    }
+
+    @Override
+    public void line(int index, net.kyori.adventure.text.Component line) {
+        this.loadLines();
+        this.lines.set(index, line);
+    }
+
+    private void loadLines() {
+        if (lines != null) {
+            return;
+        }
+        // Lazy initialization:
+        SignBlockEntity sign = this.getSnapshot();
+        lines = io.papermc.paper.adventure.PaperAdventure.asAdventure(com.google.common.collect.Lists.newArrayList(sign.messages));
+        originalLines = new java.util.ArrayList<>(lines);
+    }
+    // Paper end
+    @Override
+    public String[] getLines() {
+        this.loadLines();
+        return this.lines.stream().map(net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection()::serialize).toArray(String[]::new); // Paper
+    }
+
     @Override
     public String getLine(int index) throws IndexOutOfBoundsException {
-        return this.getLines()[index];
+        this.loadLines();
+        return net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().serialize(this.lines.get(index)); // Paper
     }
 
     @Override
     public void setLine(int index, String line) throws IndexOutOfBoundsException {
-        this.getLines()[index] = line;
+        this.loadLines();
+        this.lines.set(index, line != null ? net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(line) : net.kyori.adventure.text.Component.empty()); // Paper
     }
 
     @Override
@@ -78,13 +104,16 @@ public class CraftSign extends CraftBlockEntityState<SignBlockEntity> implements
         super.applyTo(sign);
 
         if (this.lines != null) {
-            for (int i = 0; i < lines.length; i++) {
-                String line = (this.lines[i] == null) ? "" : this.lines[i];
-                if (line.equals(this.originalLines[i])) {
+            // Paper start
+            for (int i = 0; i < this.lines.size(); ++i) {
+                net.kyori.adventure.text.Component component = this.lines.get(i);
+                net.kyori.adventure.text.Component origComp = this.originalLines.get(i);
+                if (component.equals(origComp)) {
                     continue; // The line contents are still the same, skip.
                 }
-                sign.setMessage(i, CraftChatMessage.fromString(line)[0]);
+                sign.setMessage(i, io.papermc.paper.adventure.PaperAdventure.asVanilla(component));
             }
+            // Paper end
         }
     }
 
@@ -99,6 +128,20 @@ public class CraftSign extends CraftBlockEntityState<SignBlockEntity> implements
         ((CraftPlayer) player).getHandle().openTextEdit(handle);
     }
 
+    // Paper start
+    public static Component[] sanitizeLines(java.util.List<net.kyori.adventure.text.Component> lines) {
+        Component[] components = new Component[4];
+        for (int i = 0; i < 4; i++) {
+            if (i < lines.size() && lines.get(i) != null) {
+                components[i] = io.papermc.paper.adventure.PaperAdventure.asVanilla(lines.get(i));
+            } else {
+                components[i] = net.minecraft.network.chat.Component.literal("");
+            }
+        }
+        return components;
+    }
+    // Paper end
+
     public static Component[] sanitizeLines(String[] lines) {
         Component[] components = new Component[4];
 
diff --git a/src/main/java/org/bukkit/craftbukkit/command/CraftBlockCommandSender.java b/src/main/java/org/bukkit/craftbukkit/command/CraftBlockCommandSender.java
index 3de88112bdb08d6bd0d28f20582c4090bfd8dbfe..87f2cea36d852c81fdb0a1bc21162d41377ab2e7 100644
--- a/src/main/java/org/bukkit/craftbukkit/command/CraftBlockCommandSender.java
+++ b/src/main/java/org/bukkit/craftbukkit/command/CraftBlockCommandSender.java
@@ -45,6 +45,18 @@ public class CraftBlockCommandSender extends ServerCommandSender implements Bloc
         return this.block.getTextName();
     }
 
+    // Paper start
+    @Override
+    public void sendMessage(net.kyori.adventure.identity.Identity identity, net.kyori.adventure.text.Component message, net.kyori.adventure.audience.MessageType type) {
+        block.source.sendSystemMessage(io.papermc.paper.adventure.PaperAdventure.asVanilla(message));
+    }
+
+    @Override
+    public net.kyori.adventure.text.Component name() {
+        return io.papermc.paper.adventure.PaperAdventure.asAdventure(this.block.getDisplayName());
+    }
+    // Paper end
+
     @Override
     public boolean isOp() {
         return true;
diff --git a/src/main/java/org/bukkit/craftbukkit/command/CraftConsoleCommandSender.java b/src/main/java/org/bukkit/craftbukkit/command/CraftConsoleCommandSender.java
index f3cb4102ab223f379f60dac317df7da1fab812a8..324e6d1a4fadd3e557e4ba05f04e6a5891cc54df 100644
--- a/src/main/java/org/bukkit/craftbukkit/command/CraftConsoleCommandSender.java
+++ b/src/main/java/org/bukkit/craftbukkit/command/CraftConsoleCommandSender.java
@@ -46,6 +46,13 @@ public class CraftConsoleCommandSender extends ServerCommandSender implements Co
         return "CONSOLE";
     }
 
+    // Paper start
+    @Override
+    public net.kyori.adventure.text.Component name() {
+        return net.kyori.adventure.text.Component.text(this.getName());
+    }
+    // Paper end
+
     @Override
     public boolean isOp() {
         return true;
@@ -80,4 +87,11 @@ public class CraftConsoleCommandSender extends ServerCommandSender implements Co
     public boolean isConversing() {
         return this.conversationTracker.isConversing();
     }
+
+    // Paper start
+    @Override
+    public void sendMessage(final net.kyori.adventure.identity.Identity identity, final net.kyori.adventure.text.Component message, final net.kyori.adventure.audience.MessageType type) {
+        this.sendRawMessage(net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().serialize(message));
+    }
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/craftbukkit/command/CraftRemoteConsoleCommandSender.java b/src/main/java/org/bukkit/craftbukkit/command/CraftRemoteConsoleCommandSender.java
index 03027fe2b7ffe4c7ce7f1bb4f56051a4743c7f01..a6612cc0ea87aeb8e87521ff7b5fe58c7b06b9ef 100644
--- a/src/main/java/org/bukkit/craftbukkit/command/CraftRemoteConsoleCommandSender.java
+++ b/src/main/java/org/bukkit/craftbukkit/command/CraftRemoteConsoleCommandSender.java
@@ -29,6 +29,13 @@ public class CraftRemoteConsoleCommandSender extends ServerCommandSender impleme
         return "Rcon";
     }
 
+    // Paper start
+    @Override
+    public net.kyori.adventure.text.Component name() {
+        return net.kyori.adventure.text.Component.text(this.getName());
+    }
+    // Paper end
+
     @Override
     public boolean isOp() {
         return true;
diff --git a/src/main/java/org/bukkit/craftbukkit/command/ProxiedNativeCommandSender.java b/src/main/java/org/bukkit/craftbukkit/command/ProxiedNativeCommandSender.java
index 53d6950ad270ba901de5226b9daecb683248ad05..3e7d14564f11a3ed0b0766444e9d681804597e9a 100644
--- a/src/main/java/org/bukkit/craftbukkit/command/ProxiedNativeCommandSender.java
+++ b/src/main/java/org/bukkit/craftbukkit/command/ProxiedNativeCommandSender.java
@@ -67,6 +67,13 @@ public class ProxiedNativeCommandSender implements ProxiedCommandSender {
         return this.getCallee().getName();
     }
 
+    // Paper start
+    @Override
+    public net.kyori.adventure.text.Component name() {
+        return this.getCallee().name();
+    }
+    // Paper end
+
     @Override
     public boolean isPermissionSet(String name) {
         return this.getCaller().isPermissionSet(name);
diff --git a/src/main/java/org/bukkit/craftbukkit/command/ServerCommandSender.java b/src/main/java/org/bukkit/craftbukkit/command/ServerCommandSender.java
index 8107ed0d248ff2a1cf8e556b7610a68f6c197691..eaff8df6c8c12c64e005a68a02e2e35ed88f757c 100644
--- a/src/main/java/org/bukkit/craftbukkit/command/ServerCommandSender.java
+++ b/src/main/java/org/bukkit/craftbukkit/command/ServerCommandSender.java
@@ -14,6 +14,7 @@ import org.bukkit.plugin.Plugin;
 public abstract class ServerCommandSender implements CommandSender {
     private static PermissibleBase blockPermInst;
     private final PermissibleBase perm;
+    private net.kyori.adventure.pointer.Pointers adventure$pointers; // Paper - implement pointers
 
     public ServerCommandSender() {
         if (this instanceof CraftBlockCommandSender) {
@@ -134,4 +135,18 @@ public abstract class ServerCommandSender implements CommandSender {
         return this.spigot;
     }
     // Spigot end
+
+    // Paper start - implement pointers
+    @Override
+    public net.kyori.adventure.pointer.Pointers pointers() {
+        if (this.adventure$pointers == null) {
+            this.adventure$pointers = net.kyori.adventure.pointer.Pointers.builder()
+                .withDynamic(net.kyori.adventure.identity.Identity.DISPLAY_NAME, this::name)
+                .withStatic(net.kyori.adventure.permission.PermissionChecker.POINTER, this::permissionValue)
+                .build();
+        }
+
+        return this.adventure$pointers;
+    }
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/craftbukkit/enchantments/CraftEnchantment.java b/src/main/java/org/bukkit/craftbukkit/enchantments/CraftEnchantment.java
index 53b5af4179cc4bc4d5646f183da5e327a45237ac..a859a675b4bc543e139358223cc92ad5eee3ddb5 100644
--- a/src/main/java/org/bukkit/craftbukkit/enchantments/CraftEnchantment.java
+++ b/src/main/java/org/bukkit/craftbukkit/enchantments/CraftEnchantment.java
@@ -189,6 +189,12 @@ public class CraftEnchantment extends Enchantment {
         CraftEnchantment ench = (CraftEnchantment) other;
         return !this.target.isCompatibleWith(ench.target);
     }
+    // Paper start
+    @Override
+    public net.kyori.adventure.text.Component displayName(int level) {
+        return io.papermc.paper.adventure.PaperAdventure.asAdventure(getHandle().getFullname(level));
+    }
+    // Paper end
 
     public net.minecraft.world.item.enchantment.Enchantment getHandle() {
         return this.target;
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
index 08f6be760cc2f0a6f9c6a3e165e4554ac01654e0..dfae0888684cbf3e6b2fc3201c78fa10c67628a1 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
@@ -198,6 +198,7 @@ public abstract class CraftEntity implements org.bukkit.entity.Entity {
     protected Entity entity;
     private EntityDamageEvent lastDamageEvent;
     private final CraftPersistentDataContainer persistentDataContainer = new CraftPersistentDataContainer(CraftEntity.DATA_TYPE_REGISTRY);
+    protected net.kyori.adventure.pointer.Pointers adventure$pointers; // Paper - implement pointers
 
     public CraftEntity(final CraftServer server, final Entity entity) {
         this.server = server;
@@ -847,6 +848,32 @@ public abstract class CraftEntity implements org.bukkit.entity.Entity {
         return this.getHandle().getVehicle().getBukkitEntity();
     }
 
+    // Paper start
+    @Override
+    public net.kyori.adventure.text.Component customName() {
+        final Component name = this.getHandle().getCustomName();
+        return name != null ? io.papermc.paper.adventure.PaperAdventure.asAdventure(name) : null;
+    }
+
+    @Override
+    public void customName(final net.kyori.adventure.text.Component customName) {
+        this.getHandle().setCustomName(customName != null ? io.papermc.paper.adventure.PaperAdventure.asVanilla(customName) : null);
+    }
+
+    @Override
+    public net.kyori.adventure.pointer.Pointers pointers() {
+        if (this.adventure$pointers == null) {
+            this.adventure$pointers = net.kyori.adventure.pointer.Pointers.builder()
+                .withDynamic(net.kyori.adventure.identity.Identity.DISPLAY_NAME, this::name)
+                .withDynamic(net.kyori.adventure.identity.Identity.UUID, this::getUniqueId)
+                .withStatic(net.kyori.adventure.permission.PermissionChecker.POINTER, this::permissionValue)
+                .build();
+        }
+
+        return this.adventure$pointers;
+    }
+    // Paper end
+
     @Override
     public void setCustomName(String name) {
         // sane limit for name length
@@ -902,6 +929,17 @@ public abstract class CraftEntity implements org.bukkit.entity.Entity {
     public String getName() {
         return CraftChatMessage.fromComponent(this.getHandle().getName());
     }
+    // Paper start
+    @Override
+    public net.kyori.adventure.text.@org.jetbrains.annotations.NotNull Component name() {
+        return io.papermc.paper.adventure.PaperAdventure.asAdventure(this.getHandle().getName());
+    }
+
+    @Override
+    public net.kyori.adventure.text.@org.jetbrains.annotations.NotNull Component teamDisplayName() {
+        return io.papermc.paper.adventure.PaperAdventure.asAdventure(this.getHandle().getDisplayName());
+    }
+    // Paper end
 
     @Override
     public boolean isPermissionSet(String name) {
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftHumanEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftHumanEntity.java
index ef3d6450b2ae2274b7e40c621aa30da279313669..19549dda26c24388bd13a5a2579789e2d1e3ad88 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftHumanEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftHumanEntity.java
@@ -321,9 +321,12 @@ public class CraftHumanEntity extends CraftLivingEntity implements HumanEntity {
         container = CraftEventFactory.callInventoryOpenEvent(player, container);
         if (container == null) return;
 
-        String title = container.getBukkitView().getTitle();
+        //String title = container.getBukkitView().getTitle(); // Paper - comment
+        net.kyori.adventure.text.Component adventure$title = container.getBukkitView().title(); // Paper
+        if (adventure$title == null) adventure$title = net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(container.getBukkitView().getTitle()); // Paper
 
-        player.connection.send(new ClientboundOpenScreenPacket(container.containerId, windowType, CraftChatMessage.fromString(title)[0]));
+        //player.connection.send(new ClientboundOpenScreenPacket(container.containerId, windowType, CraftChatMessage.fromString(title)[0])); // Paper - comment
+        player.connection.send(new ClientboundOpenScreenPacket(container.containerId, windowType, io.papermc.paper.adventure.PaperAdventure.asVanilla(adventure$title))); // Paper
         player.containerMenu = container;
         player.initMenu(container);
     }
@@ -392,8 +395,12 @@ public class CraftHumanEntity extends CraftLivingEntity implements HumanEntity {
 
         // Now open the window
         MenuType<?> windowType = CraftContainer.getNotchInventoryType(inventory.getTopInventory());
-        String title = inventory.getTitle();
-        player.connection.send(new ClientboundOpenScreenPacket(container.containerId, windowType, CraftChatMessage.fromString(title)[0]));
+
+        //String title = inventory.getTitle(); // Paper - comment
+        net.kyori.adventure.text.Component adventure$title = inventory.title(); // Paper
+        if (adventure$title == null) adventure$title = net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(inventory.getTitle()); // Paper
+        //player.connection.send(new ClientboundOpenScreenPacket(container.containerId, windowType, CraftChatMessage.fromString(title)[0])); // Paper - comment
+        player.connection.send(new ClientboundOpenScreenPacket(container.containerId, windowType, io.papermc.paper.adventure.PaperAdventure.asVanilla(adventure$title))); // Paper
         player.containerMenu = container;
         player.initMenu(container);
     }
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftMinecartCommand.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftMinecartCommand.java
index 446fdca49a5a6999626a7ee3a1d5c168b15a09dd..f9863e138994f6c7a7975a852f106faa96d52315 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftMinecartCommand.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftMinecartCommand.java
@@ -65,6 +65,13 @@ public class CraftMinecartCommand extends CraftMinecart implements CommandMineca
         return CraftChatMessage.fromComponent(this.getHandle().getCommandBlock().getName());
     }
 
+    // Paper start
+    @Override
+    public net.kyori.adventure.text.@org.jetbrains.annotations.NotNull Component name() {
+        return io.papermc.paper.adventure.PaperAdventure.asAdventure(this.getHandle().getCommandBlock().getName());
+    }
+    // Paper end
+
     @Override
     public boolean isOp() {
         return true;
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
index e9036bbb2ec2862252c3a39a4022e195784291ca..ef5e29e0a66f8d4cb819c4383cf3f1317d4e5bb0 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
@@ -269,14 +269,39 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
 
     @Override
     public String getDisplayName() {
+        if(true) return io.papermc.paper.adventure.DisplayNames.getLegacy(this); // Paper
         return this.getHandle().displayName;
     }
 
     @Override
     public void setDisplayName(final String name) {
+        this.getHandle().adventure$displayName = name != null ? net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(name) : net.kyori.adventure.text.Component.text(this.getName()); // Paper
         this.getHandle().displayName = name == null ? getName() : name;
     }
 
+    // Paper start
+    @Override
+    public void playerListName(net.kyori.adventure.text.Component name) {
+        getHandle().listName = name == null ? null : io.papermc.paper.adventure.PaperAdventure.asVanilla(name);
+        for (ServerPlayer player : server.getHandle().players) {
+            if (player.getBukkitEntity().canSee(this)) {
+                player.connection.send(new ClientboundPlayerInfoPacket(ClientboundPlayerInfoPacket.Action.UPDATE_DISPLAY_NAME, getHandle()));
+            }
+        }
+    }
+    @Override
+    public net.kyori.adventure.text.Component playerListName() {
+        return getHandle().listName == null ? net.kyori.adventure.text.Component.text(getName()) : io.papermc.paper.adventure.PaperAdventure.asAdventure(getHandle().listName);
+    }
+    @Override
+    public net.kyori.adventure.text.Component playerListHeader() {
+        return playerListHeader;
+    }
+    @Override
+    public net.kyori.adventure.text.Component playerListFooter() {
+        return playerListFooter;
+    }
+    // Paper end
     @Override
     public String getPlayerListName() {
         return this.getHandle().listName == null ? getName() : CraftChatMessage.fromComponent(this.getHandle().listName);
@@ -295,42 +320,42 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
         }
     }
 
-    private Component playerListHeader;
-    private Component playerListFooter;
+    private net.kyori.adventure.text.Component playerListHeader; // Paper - Adventure
+    private net.kyori.adventure.text.Component playerListFooter; // Paper - Adventure
 
     @Override
     public String getPlayerListHeader() {
-        return (this.playerListHeader == null) ? null : CraftChatMessage.fromComponent(playerListHeader);
+        return (this.playerListHeader == null) ? null : net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().serialize(playerListHeader);
     }
 
     @Override
     public String getPlayerListFooter() {
-        return (this.playerListFooter == null) ? null : CraftChatMessage.fromComponent(playerListFooter);
+        return (this.playerListFooter == null) ? null : net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().serialize(playerListFooter); // Paper - Adventure
     }
 
     @Override
     public void setPlayerListHeader(String header) {
-        this.playerListHeader = CraftChatMessage.fromStringOrNull(header, true);
+        this.playerListHeader = header == null ? null : net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(header); // Paper - Adventure
         this.updatePlayerListHeaderFooter();
     }
 
     @Override
     public void setPlayerListFooter(String footer) {
-        this.playerListFooter = CraftChatMessage.fromStringOrNull(footer, true);
+        this.playerListFooter = footer == null ? null : net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(footer); // Paper - Adventure
         this.updatePlayerListHeaderFooter();
     }
 
     @Override
     public void setPlayerListHeaderFooter(String header, String footer) {
-        this.playerListHeader = CraftChatMessage.fromStringOrNull(header, true);
-        this.playerListFooter = CraftChatMessage.fromStringOrNull(footer, true);
+        this.playerListHeader = header == null ? null : net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(header); // Paper - Adventure
+        this.playerListFooter = footer == null ? null : net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(footer); // Paper - Adventure
         this.updatePlayerListHeaderFooter();
     }
 
     private void updatePlayerListHeaderFooter() {
         if (this.getHandle().connection == null) return;
 
-        ClientboundTabListPacket packet = new ClientboundTabListPacket((this.playerListHeader == null) ? Component.empty() : this.playerListHeader, (this.playerListFooter == null) ? Component.empty() : this.playerListFooter);
+        ClientboundTabListPacket packet = new ClientboundTabListPacket((this.playerListHeader == null) ? Component.empty() : io.papermc.paper.adventure.PaperAdventure.asVanilla(this.playerListHeader), (this.playerListFooter == null) ? Component.empty() : io.papermc.paper.adventure.PaperAdventure.asVanilla(this.playerListFooter)); // Paper - adventure
         this.getHandle().connection.send(packet);
     }
 
@@ -362,6 +387,23 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
         this.getHandle().connection.disconnect(message == null ? "" : message);
     }
 
+    // Paper start
+    private static final net.kyori.adventure.text.Component DEFAULT_KICK_COMPONENT = net.kyori.adventure.text.Component.translatable("multiplayer.disconnect.kicked");
+    @Override
+    public void kick() {
+        this.kick(DEFAULT_KICK_COMPONENT);
+    }
+
+    @Override
+    public void kick(final net.kyori.adventure.text.Component message) {
+        org.spigotmc.AsyncCatcher.catchOp("player kick");
+        final ServerGamePacketListenerImpl connection = this.getHandle().connection;
+        if (connection != null) {
+            connection.disconnect(message == null ? net.kyori.adventure.text.Component.empty() : message);
+        }
+    }
+    // Paper end
+
     @Override
     public void setCompassTarget(Location loc) {
         if (this.getHandle().connection == null) return;
@@ -624,6 +666,35 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
         this.getHandle().connection.send(packet);
     }
 
+    // Paper start
+    @Override
+    public void sendSignChange(Location loc, @Nullable List<net.kyori.adventure.text.Component> lines, DyeColor dyeColor, boolean hasGlowingText) {
+        if (getHandle().connection == null) {
+            return;
+        }
+        if (lines == null) {
+            lines = new java.util.ArrayList<>(4);
+        }
+        Validate.notNull(loc, "Location cannot be null");
+        Validate.notNull(dyeColor, "DyeColor cannot be null");
+        if (lines.size() < 4) {
+            throw new IllegalArgumentException("Must have at least 4 lines");
+        }
+        Component[] components = CraftSign.sanitizeLines(lines);
+        this.sendSignChange0(components, loc, dyeColor, hasGlowingText);
+    }
+
+    private void sendSignChange0(Component[] components, Location loc, DyeColor dyeColor, boolean hasGlowingText) {
+        SignBlockEntity sign = new SignBlockEntity(new BlockPos(loc.getBlockX(), loc.getBlockY(), loc.getBlockZ()), Blocks.OAK_SIGN.defaultBlockState());
+        sign.setColor(net.minecraft.world.item.DyeColor.byId(dyeColor.getWoolData()));
+        sign.setHasGlowingText(hasGlowingText);
+        for (int i = 0; i < components.length; i++) {
+            sign.setMessage(i, components[i]);
+        }
+
+        getHandle().connection.send(sign.getUpdatePacket());
+    }
+    // Paper end
     @Override
     public void sendSignChange(Location loc, String[] lines) {
         this.sendSignChange(loc, lines, DyeColor.BLACK);
@@ -651,14 +722,15 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
         }
 
         Component[] components = CraftSign.sanitizeLines(lines);
-        SignBlockEntity sign = new SignBlockEntity(new BlockPos(loc.getBlockX(), loc.getBlockY(), loc.getBlockZ()), Blocks.OAK_SIGN.defaultBlockState());
+        /*SignBlockEntity sign = new SignBlockEntity(new BlockPos(loc.getBlockX(), loc.getBlockY(), loc.getBlockZ()), Blocks.OAK_SIGN.defaultBlockState());
         sign.setColor(net.minecraft.world.item.DyeColor.byId(dyeColor.getWoolData()));
         sign.setHasGlowingText(hasGlowingText);
         for (int i = 0; i < components.length; i++) {
             sign.setMessage(i, components[i]);
         }
 
-        this.getHandle().connection.send(sign.getUpdatePacket());
+        this.getHandle().connection.send(sign.getUpdatePacket());*/ // Paper
+        this.sendSignChange0(components, loc, dyeColor, hasGlowingText); // Paper
     }
 
     @Override
@@ -1429,7 +1501,7 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
 
     @Override
     public void setResourcePack(String url) {
-        this.setResourcePack(url, null);
+        this.setResourcePack(url, (byte[]) null);
     }
 
     @Override
@@ -1444,7 +1516,7 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
 
     @Override
     public void setResourcePack(String url, byte[] hash, boolean force) {
-        this.setResourcePack(url, hash, null, force);
+        this.setResourcePack(url, hash, (String) null, force);
     }
 
     @Override
@@ -1460,6 +1532,21 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
         }
     }
 
+    // Paper start
+    @Override
+    public void setResourcePack(String url, byte[] hashBytes, net.kyori.adventure.text.Component prompt, boolean force) {
+        Validate.notNull(url, "Resource pack URL cannot be null");
+        final String hash;
+        if (hashBytes != null) {
+            Validate.isTrue(hashBytes.length == 20, "Resource pack hash should be 20 bytes long but was " + hashBytes.length);
+            hash = BaseEncoding.base16().lowerCase().encode(hashBytes);
+        } else {
+            hash = "";
+        }
+        this.getHandle().sendTexturePack(url, hash, force, io.papermc.paper.adventure.PaperAdventure.asVanilla(prompt));
+    }
+    // Paper end
+
     public void addChannel(String channel) {
         Preconditions.checkState(this.channels.size() < 128, "Cannot register channel '%s'. Too many channels registered!", channel);
         channel = StandardMessenger.validateAndCorrectChannel(channel);
@@ -1864,6 +1951,12 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
         return (this.getHandle().clientViewDistance == null) ? Bukkit.getViewDistance() : this.getHandle().clientViewDistance;
     }
 
+    // Paper start
+    @Override
+    public java.util.Locale locale() {
+        return getHandle().adventure$locale;
+    }
+    // Paper end
     @Override
     public int getPing() {
         return this.getHandle().latency;
@@ -1909,6 +2002,193 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
         return this.getHandle().allowsListing();
     }
 
+    // Paper start
+    @Override
+    public net.kyori.adventure.text.Component displayName() {
+        return this.getHandle().adventure$displayName;
+    }
+
+    @Override
+    public void displayName(final net.kyori.adventure.text.Component displayName) {
+        this.getHandle().adventure$displayName = displayName != null ? displayName : net.kyori.adventure.text.Component.text(this.getName());
+        this.getHandle().displayName = null;
+    }
+
+    @Override
+    public void sendMessage(final net.kyori.adventure.identity.Identity identity, final net.kyori.adventure.text.Component message, final net.kyori.adventure.audience.MessageType type) {
+        if (getHandle().connection == null) return;
+        final net.minecraft.core.Registry<net.minecraft.network.chat.ChatType> chatTypeRegistry = this.getHandle().level.registryAccess().registryOrThrow(net.minecraft.core.Registry.CHAT_TYPE_REGISTRY);
+        this.getHandle().connection.send(new net.minecraft.network.protocol.game.ClientboundSystemChatPacket(message, false));
+    }
+
+    @Override
+    public void sendActionBar(final net.kyori.adventure.text.Component message) {
+        final net.minecraft.network.protocol.game.ClientboundSetActionBarTextPacket packet = new net.minecraft.network.protocol.game.ClientboundSetActionBarTextPacket((net.minecraft.network.chat.Component) null);
+        packet.adventure$text = message;
+        this.getHandle().connection.send(packet);
+    }
+
+    @Override
+    public void sendPlayerListHeader(final net.kyori.adventure.text.Component header) {
+        this.playerListHeader = header;
+        this.adventure$sendPlayerListHeaderAndFooter();
+    }
+
+    @Override
+    public void sendPlayerListFooter(final net.kyori.adventure.text.Component footer) {
+        this.playerListFooter = footer;
+        this.adventure$sendPlayerListHeaderAndFooter();
+    }
+
+    @Override
+    public void sendPlayerListHeaderAndFooter(final net.kyori.adventure.text.Component header, final net.kyori.adventure.text.Component footer) {
+        this.playerListHeader = header;
+        this.playerListFooter = footer;
+        this.adventure$sendPlayerListHeaderAndFooter();
+    }
+
+    private void adventure$sendPlayerListHeaderAndFooter() {
+        final ServerGamePacketListenerImpl connection = this.getHandle().connection;
+        if (connection == null) return;
+        final ClientboundTabListPacket packet = new ClientboundTabListPacket(null, null);
+        packet.adventure$header = (this.playerListHeader == null) ? net.kyori.adventure.text.Component.empty() : this.playerListHeader;
+        packet.adventure$footer = (this.playerListFooter == null) ? net.kyori.adventure.text.Component.empty() : this.playerListFooter;
+        connection.send(packet);
+    }
+
+    @Override
+    public void showTitle(final net.kyori.adventure.title.Title title) {
+        final ServerGamePacketListenerImpl connection = this.getHandle().connection;
+        final net.kyori.adventure.title.Title.Times times = title.times();
+        if (times != null) {
+            connection.send(new ClientboundSetTitlesAnimationPacket(ticks(times.fadeIn()), ticks(times.stay()), ticks(times.fadeOut())));
+        }
+        final ClientboundSetSubtitleTextPacket sp = new ClientboundSetSubtitleTextPacket((net.minecraft.network.chat.Component) null);
+        sp.adventure$text = title.subtitle();
+        connection.send(sp);
+        final ClientboundSetTitleTextPacket tp = new ClientboundSetTitleTextPacket((net.minecraft.network.chat.Component) null);
+        tp.adventure$text = title.title();
+        connection.send(tp);
+    }
+
+    @Override
+    public <T> void sendTitlePart(final net.kyori.adventure.title.TitlePart<T> part, T value) {
+        java.util.Objects.requireNonNull(part, "part");
+        java.util.Objects.requireNonNull(value, "value");
+        if (part == net.kyori.adventure.title.TitlePart.TITLE) {
+            final ClientboundSetTitleTextPacket tp = new ClientboundSetTitleTextPacket((net.minecraft.network.chat.Component) null);
+            tp.adventure$text = (net.kyori.adventure.text.Component) value;
+            this.getHandle().connection.send(tp);
+        } else if (part == net.kyori.adventure.title.TitlePart.SUBTITLE) {
+            final ClientboundSetSubtitleTextPacket sp = new ClientboundSetSubtitleTextPacket((net.minecraft.network.chat.Component) null);
+            sp.adventure$text = (net.kyori.adventure.text.Component) value;
+            this.getHandle().connection.send(sp);
+        } else if (part == net.kyori.adventure.title.TitlePart.TIMES) {
+            final net.kyori.adventure.title.Title.Times times = (net.kyori.adventure.title.Title.Times) value;
+            this.getHandle().connection.send(new ClientboundSetTitlesAnimationPacket(ticks(times.fadeIn()), ticks(times.stay()), ticks(times.fadeOut())));
+        } else {
+            throw new IllegalArgumentException("Unknown TitlePart");
+        }
+    }
+
+    private static int ticks(final java.time.Duration duration) {
+        if (duration == null) {
+            return -1;
+        }
+        return (int) (duration.toMillis() / 50L);
+    }
+
+    @Override
+    public void clearTitle() {
+        this.getHandle().connection.send(new net.minecraft.network.protocol.game.ClientboundClearTitlesPacket(false));
+    }
+
+    // resetTitle implemented above
+
+    @Override
+    public void showBossBar(final net.kyori.adventure.bossbar.BossBar bar) {
+        ((net.kyori.adventure.bossbar.HackyBossBarPlatformBridge) bar).paper$playerShow(this);
+    }
+
+    @Override
+    public void hideBossBar(final net.kyori.adventure.bossbar.BossBar bar) {
+        ((net.kyori.adventure.bossbar.HackyBossBarPlatformBridge) bar).paper$playerHide(this);
+    }
+
+    @Override
+    public void playSound(final net.kyori.adventure.sound.Sound sound) {
+        final Vec3 pos = this.getHandle().position();
+        this.playSound(sound, pos.x, pos.y, pos.z);
+    }
+
+    @Override
+    public void playSound(final net.kyori.adventure.sound.Sound sound, final double x, final double y, final double z) {
+        final ResourceLocation name = io.papermc.paper.adventure.PaperAdventure.asVanilla(sound.name());
+        final java.util.Optional<net.minecraft.sounds.SoundEvent> event = net.minecraft.core.Registry.SOUND_EVENT.getOptional(name);
+        if (event.isPresent()) {
+            this.getHandle().connection.send(new ClientboundSoundPacket(event.get(), io.papermc.paper.adventure.PaperAdventure.asVanilla(sound.source()), x, y, z, sound.volume(), sound.pitch(), this.getHandle().getRandom().nextLong())); // TODO adventure sound seed
+        } else {
+            this.getHandle().connection.send(new ClientboundCustomSoundPacket(name, io.papermc.paper.adventure.PaperAdventure.asVanilla(sound.source()), new Vec3(x, y, z), sound.volume(), sound.pitch(), this.getHandle().getRandom().nextLong())); // TODO adventure sound seed
+        }
+    }
+
+    @Override
+    public void playSound(final net.kyori.adventure.sound.Sound sound, final net.kyori.adventure.sound.Sound.Emitter emitter) {
+        final Entity entity;
+        if (emitter == net.kyori.adventure.sound.Sound.Emitter.self()) {
+            entity = this.getHandle();
+        } else if (emitter instanceof org.bukkit.entity.Entity) {
+            entity = ((CraftEntity) emitter).getHandle();
+        } else {
+            throw new IllegalArgumentException("Sound emitter must be an Entity or self(), but was: " + emitter);
+        }
+
+        final ResourceLocation name = io.papermc.paper.adventure.PaperAdventure.asVanilla(sound.name());
+        final java.util.Optional<net.minecraft.sounds.SoundEvent> event = net.minecraft.core.Registry.SOUND_EVENT.getOptional(name);
+        if (event.isPresent()) {
+            this.getHandle().connection.send(new net.minecraft.network.protocol.game.ClientboundSoundEntityPacket(event.get(), io.papermc.paper.adventure.PaperAdventure.asVanilla(sound.source()), entity, sound.volume(), sound.pitch(), this.getHandle().getRandom().nextLong())); // TODO adventure sound seed
+        } else {
+            this.getHandle().connection.send(new ClientboundCustomSoundPacket(name, io.papermc.paper.adventure.PaperAdventure.asVanilla(sound.source()), entity.position(), sound.volume(), sound.pitch(), this.getHandle().getRandom().nextLong())); // TODO adventure sound seed
+        }
+    }
+
+    @Override
+    public void stopSound(final net.kyori.adventure.sound.SoundStop stop) {
+        this.getHandle().connection.send(new ClientboundStopSoundPacket(
+            io.papermc.paper.adventure.PaperAdventure.asVanillaNullable(stop.sound()),
+            io.papermc.paper.adventure.PaperAdventure.asVanillaNullable(stop.source())
+        ));
+    }
+
+    @Override
+    public void openBook(final net.kyori.adventure.inventory.Book book) {
+        final java.util.Locale locale = this.getHandle().adventure$locale;
+        final net.minecraft.world.item.ItemStack item = io.papermc.paper.adventure.PaperAdventure.asItemStack(book, locale);
+        final ServerPlayer player = this.getHandle();
+        final ServerGamePacketListenerImpl connection = player.connection;
+        final net.minecraft.world.entity.player.Inventory inventory = player.getInventory();
+        final int slot = inventory.items.size() + inventory.selected;
+        final int stateId = getHandle().containerMenu.getStateId();
+        connection.send(new net.minecraft.network.protocol.game.ClientboundContainerSetSlotPacket(0, stateId, slot, item));
+        connection.send(new net.minecraft.network.protocol.game.ClientboundOpenBookPacket(net.minecraft.world.InteractionHand.MAIN_HAND));
+        connection.send(new net.minecraft.network.protocol.game.ClientboundContainerSetSlotPacket(0, stateId, slot, inventory.getSelected()));
+    }
+
+    @Override
+    public net.kyori.adventure.pointer.Pointers pointers() {
+        if (this.adventure$pointers == null) {
+            this.adventure$pointers = net.kyori.adventure.pointer.Pointers.builder()
+                .withDynamic(net.kyori.adventure.identity.Identity.DISPLAY_NAME, this::displayName)
+                .withDynamic(net.kyori.adventure.identity.Identity.NAME, this::getName)
+                .withDynamic(net.kyori.adventure.identity.Identity.UUID, this::getUniqueId)
+                .withStatic(net.kyori.adventure.permission.PermissionChecker.POINTER, this::permissionValue)
+                .withDynamic(net.kyori.adventure.identity.Identity.LOCALE, this::locale)
+                .build();
+        }
+
+        return this.adventure$pointers;
+    }
+    // Paper end
     // Spigot start
     private final Player.Spigot spigot = new Player.Spigot()
     {
diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
index d0699be22411796174b58733cfb79b80c89f9769..97a614e2367439dbface4a258f966c0440ef965d 100644
--- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
+++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
@@ -816,9 +816,9 @@ public class CraftEventFactory {
         return event;
     }
 
-    public static PlayerDeathEvent callPlayerDeathEvent(ServerPlayer victim, List<org.bukkit.inventory.ItemStack> drops, String deathMessage, boolean keepInventory) {
+    public static PlayerDeathEvent callPlayerDeathEvent(ServerPlayer victim, List<org.bukkit.inventory.ItemStack> drops, net.kyori.adventure.text.Component deathMessage, String stringDeathMessage, boolean keepInventory) { // Paper - Adventure
         CraftPlayer entity = victim.getBukkitEntity();
-        PlayerDeathEvent event = new PlayerDeathEvent(entity, drops, victim.getExpReward(), 0, deathMessage);
+        PlayerDeathEvent event = new PlayerDeathEvent(entity, drops, victim.getExpReward(), 0, deathMessage, stringDeathMessage); // Paper - Adventure
         event.setKeepInventory(keepInventory);
         event.setKeepLevel(victim.keepLevel); // SPIGOT-2222: pre-set keepLevel
         org.bukkit.World world = entity.getWorld();
@@ -843,7 +843,7 @@ public class CraftEventFactory {
      * Server methods
      */
     public static ServerListPingEvent callServerListPingEvent(Server craftServer, InetAddress address, String motd, boolean shouldSendChatPreviews, int numPlayers, int maxPlayers) {
-        ServerListPingEvent event = new ServerListPingEvent(address, motd, shouldSendChatPreviews, numPlayers, maxPlayers);
+        ServerListPingEvent event = new ServerListPingEvent(address, craftServer.motd(), shouldSendChatPreviews, numPlayers, maxPlayers); // Paper - Adventure
         craftServer.getPluginManager().callEvent(event);
         return event;
     }
diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftContainer.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftContainer.java
index e2711a189bcaffc0f79d903f0696d87b0de116fe..9531a11e63b4c5beeebabc45e4a40d5d39f05c7a 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftContainer.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftContainer.java
@@ -69,6 +69,13 @@ public class CraftContainer extends AbstractContainerMenu {
                 return inventory.getType();
             }
 
+            // Paper start
+            @Override
+            public net.kyori.adventure.text.Component title() {
+                return inventory instanceof CraftInventoryCustom ? ((CraftInventoryCustom.MinecraftInventory) ((CraftInventory) inventory).getInventory()).title() : net.kyori.adventure.text.Component.text(inventory.getType().getDefaultTitle());
+            }
+            // Paper end
+
             @Override
             public String getTitle() {
                 return inventory instanceof CraftInventoryCustom ? ((CraftInventoryCustom.MinecraftInventory) ((CraftInventory) inventory).getInventory()).getTitle() : inventory.getType().getDefaultTitle();
diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftInventoryCustom.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftInventoryCustom.java
index 6486a76466691f958349a4706d7c9caff9cb8f64..f3ebaefd949ae73afad3dcb69b8d9c632cc782f7 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftInventoryCustom.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftInventoryCustom.java
@@ -19,6 +19,12 @@ public class CraftInventoryCustom extends CraftInventory {
         super(new MinecraftInventory(owner, type));
     }
 
+    // Paper start
+    public CraftInventoryCustom(InventoryHolder owner, InventoryType type, net.kyori.adventure.text.Component title) {
+        super(new MinecraftInventory(owner, type, title));
+    }
+    // Paper end
+
     public CraftInventoryCustom(InventoryHolder owner, InventoryType type, String title) {
         super(new MinecraftInventory(owner, type, title));
     }
@@ -27,6 +33,12 @@ public class CraftInventoryCustom extends CraftInventory {
         super(new MinecraftInventory(owner, size));
     }
 
+    // Paper start
+    public CraftInventoryCustom(InventoryHolder owner, int size, net.kyori.adventure.text.Component title) {
+        super(new MinecraftInventory(owner, size, title));
+    }
+    // Paper end
+
     public CraftInventoryCustom(InventoryHolder owner, int size, String title) {
         super(new MinecraftInventory(owner, size, title));
     }
@@ -36,9 +48,17 @@ public class CraftInventoryCustom extends CraftInventory {
         private int maxStack = MAX_STACK;
         private final List<HumanEntity> viewers;
         private final String title;
+        private final net.kyori.adventure.text.Component adventure$title; // Paper
         private InventoryType type;
         private final InventoryHolder owner;
 
+        // Paper start
+        public MinecraftInventory(InventoryHolder owner, InventoryType type, net.kyori.adventure.text.Component title) {
+            this(owner, type.getDefaultSize(), title);
+            this.type = type;
+        }
+        // Paper end
+
         public MinecraftInventory(InventoryHolder owner, InventoryType type) {
             this(owner, type.getDefaultSize(), type.getDefaultTitle());
             this.type = type;
@@ -57,11 +77,24 @@ public class CraftInventoryCustom extends CraftInventory {
             Validate.notNull(title, "Title cannot be null");
             this.items = NonNullList.withSize(size, ItemStack.EMPTY);
             this.title = title;
+            this.adventure$title = net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(title);
             this.viewers = new ArrayList<HumanEntity>();
             this.owner = owner;
             this.type = InventoryType.CHEST;
         }
 
+        // Paper start
+        public MinecraftInventory(final InventoryHolder owner, final int size, final net.kyori.adventure.text.Component title) {
+            Validate.notNull(title, "Title cannot be null");
+            this.items = NonNullList.withSize(size, ItemStack.EMPTY);
+            this.title = net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().serialize(title);
+            this.adventure$title = title;
+            this.viewers = new ArrayList<HumanEntity>();
+            this.owner = owner;
+            this.type = InventoryType.CHEST;
+        }
+        // Paper end
+
         @Override
         public int getContainerSize() {
             return this.items.size();
@@ -183,6 +216,12 @@ public class CraftInventoryCustom extends CraftInventory {
             return null;
         }
 
+        // Paper start
+        public net.kyori.adventure.text.Component title() {
+            return this.adventure$title;
+        }
+        // Paper end
+
         public String getTitle() {
             return this.title;
         }
diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftInventoryView.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftInventoryView.java
index 6a64fbb8b4937f39d5fdc2e2cbec26c83c74c486..7d6b5fdb00a5c1614849735634262a36a4efbd66 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftInventoryView.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftInventoryView.java
@@ -64,6 +64,13 @@ public class CraftInventoryView extends InventoryView {
         return CraftItemStack.asCraftMirror(this.container.getSlot(slot).getItem());
     }
 
+    // Paper start
+    @Override
+    public net.kyori.adventure.text.Component title() {
+        return io.papermc.paper.adventure.PaperAdventure.asAdventure(this.container.getTitle());
+    }
+    // Paper end
+
     @Override
     public String getTitle() {
         return CraftChatMessage.fromComponent(this.container.getTitle());
diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java
index c7503805bb2358996fb704288b8e4320aee6f425..a06f9775a43a245380edabde63e7999082e7958a 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java
@@ -374,4 +374,17 @@ public final class CraftItemFactory implements ItemFactory {
     public Material updateMaterial(ItemMeta meta, Material material) throws IllegalArgumentException {
         return ((CraftMetaItem) meta).updateMaterial(material);
     }
+
+    // Paper start
+    @Override
+    public net.kyori.adventure.text.event.HoverEvent<net.kyori.adventure.text.event.HoverEvent.ShowItem> asHoverEvent(final ItemStack item, final java.util.function.UnaryOperator<net.kyori.adventure.text.event.HoverEvent.ShowItem> op) {
+        final net.minecraft.nbt.CompoundTag tag = CraftItemStack.asNMSCopy(item).getTag();
+        return net.kyori.adventure.text.event.HoverEvent.showItem(op.apply(net.kyori.adventure.text.event.HoverEvent.ShowItem.of(item.getType().getKey(), item.getAmount(), io.papermc.paper.adventure.PaperAdventure.asBinaryTagHolder(tag))));
+    }
+
+    @Override
+    public net.kyori.adventure.text.@org.jetbrains.annotations.NotNull Component displayName(@org.jetbrains.annotations.NotNull ItemStack itemStack) {
+        return io.papermc.paper.adventure.PaperAdventure.asAdventure(CraftItemStack.asNMSCopy(itemStack).getDisplayName());
+    }
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMerchantCustom.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMerchantCustom.java
index a0334ec0a80dfc4f1e68c2e338aa486faaefb29e..257776a12ca26c1e75be22a67c94b0aa012fd687 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMerchantCustom.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMerchantCustom.java
@@ -13,10 +13,17 @@ import org.bukkit.craftbukkit.util.CraftChatMessage;
 
 public class CraftMerchantCustom extends CraftMerchant {
 
+    @Deprecated // Paper - Adventure
     public CraftMerchantCustom(String title) {
         super(new MinecraftMerchant(title));
         this.getMerchant().craftMerchant = this;
     }
+    // Paper start
+    public CraftMerchantCustom(net.kyori.adventure.text.Component title) {
+        super(new MinecraftMerchant(title));
+        getMerchant().craftMerchant = this;
+    }
+    // Paper end
 
     @Override
     public String toString() {
@@ -35,10 +42,17 @@ public class CraftMerchantCustom extends CraftMerchant {
         private Player tradingPlayer;
         protected CraftMerchant craftMerchant;
 
+        @Deprecated // Paper - Adventure
         public MinecraftMerchant(String title) {
             Validate.notNull(title, "Title cannot be null");
             this.title = CraftChatMessage.fromString(title)[0];
         }
+        // Paper start
+        public MinecraftMerchant(net.kyori.adventure.text.Component title) {
+            Validate.notNull(title, "Title cannot be null");
+            this.title = io.papermc.paper.adventure.PaperAdventure.asVanilla(title);
+        }
+        // Paper end
 
         @Override
         public CraftMerchant getCraftMerchant() {
diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaBook.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaBook.java
index 4154b4489be172f1ef1693b54368b7ffc8629c31..e8413ad360e9b6c4eef13edf9dd0095e7e64bce2 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaBook.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaBook.java
@@ -1,8 +1,9 @@
 package org.bukkit.craftbukkit.inventory;
 
 import com.google.common.collect.ImmutableList;
-import com.google.common.collect.ImmutableMap.Builder;
 import com.google.common.collect.Lists;
+
+import com.google.common.collect.ImmutableMap; // Paper
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -261,6 +262,145 @@ public class CraftMetaBook extends CraftMetaItem implements BookMeta {
         this.generation = (generation == null) ? null : generation.ordinal();
     }
 
+    // Paper start
+    @Override
+    public net.kyori.adventure.text.Component title() {
+        return this.title == null ? null : net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(this.title);
+    }
+
+    @Override
+    public org.bukkit.inventory.meta.BookMeta title(net.kyori.adventure.text.Component title) {
+        this.setTitle(title == null ? null : net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().serialize(title));
+        return this;
+    }
+
+    @Override
+    public net.kyori.adventure.text.Component author() {
+        return this.author == null ? null : net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(this.author);
+    }
+
+    @Override
+    public org.bukkit.inventory.meta.BookMeta author(net.kyori.adventure.text.Component author) {
+        this.setAuthor(author == null ? null : net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().serialize(author));
+        return this;
+    }
+
+    @Override
+    public net.kyori.adventure.text.Component page(final int page) {
+        Validate.isTrue(isValidPage(page), "Invalid page number");
+        return this instanceof CraftMetaBookSigned ? net.kyori.adventure.text.serializer.gson.GsonComponentSerializer.gson().deserialize(pages.get(page - 1)) : net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(pages.get(page - 1));
+    }
+
+    @Override
+    public void page(final int page, net.kyori.adventure.text.Component data) {
+        if (!isValidPage(page)) {
+            throw new IllegalArgumentException("Invalid page number " + page + "/" + pages.size());
+        }
+        if (data == null) {
+            data = net.kyori.adventure.text.Component.empty();
+        }
+        pages.set(page - 1, this instanceof CraftMetaBookSigned ? net.kyori.adventure.text.serializer.gson.GsonComponentSerializer.gson().serialize(data) : net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().serialize(data));
+    }
+
+    @Override
+    public List<net.kyori.adventure.text.Component> pages() {
+        if (this.pages == null) return ImmutableList.of();
+        if (this instanceof CraftMetaBookSigned)
+            return pages.stream().map(net.kyori.adventure.text.serializer.gson.GsonComponentSerializer.gson()::deserialize).collect(ImmutableList.toImmutableList());
+        else
+            return pages.stream().map(net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection()::deserialize).collect(ImmutableList.toImmutableList());
+    }
+
+    @Override
+    public BookMeta pages(List<net.kyori.adventure.text.Component> pages) {
+        if (this.pages != null) this.pages.clear();
+        for (net.kyori.adventure.text.Component page : pages) {
+            addPages(page);
+        }
+        return this;
+    }
+
+    @Override
+    public BookMeta pages(net.kyori.adventure.text.Component... pages) {
+        if (this.pages != null) this.pages.clear();
+        addPages(pages);
+        return this;
+    }
+
+    @Override
+    public void addPages(net.kyori.adventure.text.Component... pages) {
+        if (this.pages == null) this.pages = new ArrayList<>();
+        for (net.kyori.adventure.text.Component page : pages) {
+            if (this.pages.size() >= MAX_PAGES) {
+                return;
+            }
+
+            if (page == null) {
+                page = net.kyori.adventure.text.Component.empty();
+            }
+
+            this.pages.add(this instanceof CraftMetaBookSigned ? net.kyori.adventure.text.serializer.gson.GsonComponentSerializer.gson().serialize(page) : net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().serialize(page));
+        }
+    }
+
+    private CraftMetaBook(net.kyori.adventure.text.Component title, net.kyori.adventure.text.Component author, List<net.kyori.adventure.text.Component> pages) {
+        super((org.bukkit.craftbukkit.inventory.CraftMetaItem) org.bukkit.Bukkit.getItemFactory().getItemMeta(org.bukkit.Material.WRITABLE_BOOK));
+        this.title = title == null ? null : net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().serialize(title);
+        this.author = author == null ? null : net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().serialize(author);
+        this.pages = pages.subList(0, Math.min(MAX_PAGES, pages.size())).stream().map(net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection()::serialize).collect(java.util.stream.Collectors.toList());
+    }
+
+    static class CraftMetaBookBuilder implements BookMetaBuilder {
+        private net.kyori.adventure.text.Component title = null;
+        private net.kyori.adventure.text.Component author = null;
+        private final List<net.kyori.adventure.text.Component> pages = new java.util.ArrayList<>();
+
+        @Override
+        public BookMetaBuilder title(net.kyori.adventure.text.Component title) {
+            this.title = title;
+            return this;
+        }
+
+        @Override
+        public BookMetaBuilder author(net.kyori.adventure.text.Component author) {
+            this.author = author;
+            return this;
+        }
+
+        @Override
+        public BookMetaBuilder addPage(net.kyori.adventure.text.Component page) {
+            this.pages.add(page);
+            return this;
+        }
+
+        @Override
+        public BookMetaBuilder pages(net.kyori.adventure.text.Component... pages) {
+            java.util.Collections.addAll(this.pages, pages);
+            return this;
+        }
+
+        @Override
+        public BookMetaBuilder pages(java.util.Collection<net.kyori.adventure.text.Component> pages) {
+            this.pages.addAll(pages);
+            return this;
+        }
+
+        @Override
+        public BookMeta build() {
+            return this.build(title, author, pages);
+        }
+
+        protected BookMeta build(net.kyori.adventure.text.Component title, net.kyori.adventure.text.Component author, java.util.List<net.kyori.adventure.text.Component> pages) {
+            return new CraftMetaBook(title, author, pages);
+        }
+    }
+
+    @Override
+    public BookMetaBuilder toBuilder() {
+        return new CraftMetaBookBuilder();
+    }
+
+    // Paper end
     @Override
     public String getPage(final int page) {
         Validate.isTrue(this.isValidPage(page), "Invalid page number");
@@ -405,7 +545,7 @@ public class CraftMetaBook extends CraftMetaItem implements BookMeta {
     }
 
     @Override
-    Builder<String, Object> serialize(Builder<String, Object> builder) {
+    ImmutableMap.Builder<String, Object> serialize(ImmutableMap.Builder<String, Object> builder) {
         super.serialize(builder);
 
         if (this.hasTitle()) {
diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaBookSigned.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaBookSigned.java
index 507fa96a3fb904b74429df5756c9a6378ec8c5b7..abb9e88abc74135284b941e040d4058690a82b27 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaBookSigned.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaBookSigned.java
@@ -1,6 +1,6 @@
 package org.bukkit.craftbukkit.inventory;
 
-import com.google.common.collect.ImmutableMap.Builder;
+import com.google.common.collect.ImmutableMap; // Paper
 import java.util.Map;
 import net.minecraft.nbt.CompoundTag;
 import org.bukkit.Material;
@@ -78,8 +78,29 @@ class CraftMetaBookSigned extends CraftMetaBook implements BookMeta {
     }
 
     @Override
-    Builder<String, Object> serialize(Builder<String, Object> builder) {
+    ImmutableMap.Builder<String, Object> serialize(ImmutableMap.Builder<String, Object> builder) {
         super.serialize(builder);
         return builder;
     }
+
+    // Paper start - adventure
+    private CraftMetaBookSigned(net.kyori.adventure.text.Component title, net.kyori.adventure.text.Component author, java.util.List<net.kyori.adventure.text.Component> pages) {
+        super((org.bukkit.craftbukkit.inventory.CraftMetaItem) org.bukkit.Bukkit.getItemFactory().getItemMeta(Material.WRITABLE_BOOK));
+        this.title = title == null ? null : net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().serialize(title);
+        this.author = author == null ? null : net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().serialize(author);
+        this.pages = io.papermc.paper.adventure.PaperAdventure.asJson(pages.subList(0, Math.min(MAX_PAGES, pages.size())));
+    }
+
+    static final class CraftMetaBookSignedBuilder extends CraftMetaBookBuilder {
+        @Override
+        protected BookMeta build(net.kyori.adventure.text.Component title, net.kyori.adventure.text.Component author, java.util.List<net.kyori.adventure.text.Component> pages) {
+            return new CraftMetaBookSigned(title, author, pages);
+        }
+    }
+
+    @Override
+    public BookMetaBuilder toBuilder() {
+        return new CraftMetaBookSignedBuilder();
+    }
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaItem.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaItem.java
index f2737146ffb005dec43bd796043c53397a3b7485..0a5f063bc74e1dae67167537437ebd7e4ddf113a 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaItem.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaItem.java
@@ -746,6 +746,18 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
         return !(this.hasDisplayName() || this.hasLocalizedName() || this.hasEnchants() || (this.lore != null) || this.hasCustomModelData() || this.hasBlockData() || this.hasRepairCost() || !this.unhandledTags.isEmpty() || !this.persistentDataContainer.isEmpty() || this.hideFlag != 0 || this.isUnbreakable() || this.hasDamage() || this.hasAttributeModifiers());
     }
 
+    // Paper start
+    @Override
+    public net.kyori.adventure.text.Component displayName() {
+        return displayName == null ? null : net.kyori.adventure.text.serializer.gson.GsonComponentSerializer.gson().deserialize(displayName);
+    }
+
+    @Override
+    public void displayName(final net.kyori.adventure.text.Component displayName) {
+        this.displayName = displayName == null ? null : net.kyori.adventure.text.serializer.gson.GsonComponentSerializer.gson().serialize(displayName);
+    }
+    // Paper end
+
     @Override
     public String getDisplayName() {
         return CraftChatMessage.fromJSONComponent(displayName);
@@ -781,6 +793,18 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
         return this.lore != null && !this.lore.isEmpty();
     }
 
+    // Paper start
+    @Override
+    public List<net.kyori.adventure.text.Component> lore() {
+        return this.lore != null ? io.papermc.paper.adventure.PaperAdventure.asAdventureFromJson(this.lore) : null;
+    }
+
+    @Override
+    public void lore(final List<net.kyori.adventure.text.Component> lore) {
+        this.lore = lore != null ? io.papermc.paper.adventure.PaperAdventure.asJson(lore) : null;
+    }
+    // Paper end
+
     @Override
     public boolean hasRepairCost() {
         return this.repairCost > 0;
diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/util/CraftCustomInventoryConverter.java b/src/main/java/org/bukkit/craftbukkit/inventory/util/CraftCustomInventoryConverter.java
index ed4415f6dd588c08c922efd5beebb3b124beb9d6..78a7ac47f20e84ccd67ff44d0bc7a2f2faa0d476 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/util/CraftCustomInventoryConverter.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/util/CraftCustomInventoryConverter.java
@@ -12,6 +12,13 @@ public class CraftCustomInventoryConverter implements CraftInventoryCreator.Inve
         return new CraftInventoryCustom(holder, type);
     }
 
+    // Paper start
+    @Override
+    public Inventory createInventory(InventoryHolder owner, InventoryType type, net.kyori.adventure.text.Component title) {
+        return new CraftInventoryCustom(owner, type, title);
+    }
+    // Paper end
+
     @Override
     public Inventory createInventory(InventoryHolder owner, InventoryType type, String title) {
         return new CraftInventoryCustom(owner, type, title);
@@ -21,6 +28,12 @@ public class CraftCustomInventoryConverter implements CraftInventoryCreator.Inve
         return new CraftInventoryCustom(owner, size);
     }
 
+    // Paper start
+    public Inventory createInventory(InventoryHolder owner, int size, net.kyori.adventure.text.Component title) {
+        return new CraftInventoryCustom(owner, size, title);
+    }
+    // Paper end
+
     public Inventory createInventory(InventoryHolder owner, int size, String title) {
         return new CraftInventoryCustom(owner, size, title);
     }
diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/util/CraftInventoryCreator.java b/src/main/java/org/bukkit/craftbukkit/inventory/util/CraftInventoryCreator.java
index 4e705b7367b78c2da98d0b174807ecbce75f3a59..4972ce5d876d74e04a4fbfeb860f1d44e25b3470 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/util/CraftInventoryCreator.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/util/CraftInventoryCreator.java
@@ -43,6 +43,12 @@ public final class CraftInventoryCreator {
         return this.converterMap.get(type).createInventory(holder, type);
     }
 
+    // Paper start
+    public Inventory createInventory(InventoryHolder holder, InventoryType type, net.kyori.adventure.text.Component title) {
+        return converterMap.get(type).createInventory(holder, type, title);
+    }
+    // Paper end
+
     public Inventory createInventory(InventoryHolder holder, InventoryType type, String title) {
         return this.converterMap.get(type).createInventory(holder, type, title);
     }
@@ -51,6 +57,12 @@ public final class CraftInventoryCreator {
         return this.DEFAULT_CONVERTER.createInventory(holder, size);
     }
 
+    // Paper start
+    public Inventory createInventory(InventoryHolder holder, int size, net.kyori.adventure.text.Component title) {
+        return DEFAULT_CONVERTER.createInventory(holder, size, title);
+    }
+    // Paper end
+
     public Inventory createInventory(InventoryHolder holder, int size, String title) {
         return this.DEFAULT_CONVERTER.createInventory(holder, size, title);
     }
@@ -59,6 +71,10 @@ public final class CraftInventoryCreator {
 
         Inventory createInventory(InventoryHolder holder, InventoryType type);
 
+        // Paper start
+        Inventory createInventory(InventoryHolder holder, InventoryType type, net.kyori.adventure.text.Component title);
+        // Paper end
+
         Inventory createInventory(InventoryHolder holder, InventoryType type, String title);
     }
 }
diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/util/CraftTileInventoryConverter.java b/src/main/java/org/bukkit/craftbukkit/inventory/util/CraftTileInventoryConverter.java
index 1980240d3dc0331ddf2ff56e163e2bfbd3b231ab..7a7f3f53aef601f124d474d9890e23d87dd96900 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/util/CraftTileInventoryConverter.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/util/CraftTileInventoryConverter.java
@@ -31,6 +31,18 @@ public abstract class CraftTileInventoryConverter implements CraftInventoryCreat
         return this.getInventory(this.getTileEntity());
     }
 
+    // Paper start
+    @Override
+    public Inventory createInventory(InventoryHolder owner, InventoryType type, net.kyori.adventure.text.Component title) {
+        Container te = getTileEntity();
+        if (te instanceof RandomizableContainerBlockEntity) {
+            ((RandomizableContainerBlockEntity) te).setCustomName(io.papermc.paper.adventure.PaperAdventure.asVanilla(title));
+        }
+
+        return getInventory(te);
+    }
+    // Paper end
+
     @Override
     public Inventory createInventory(InventoryHolder holder, InventoryType type, String title) {
         Container te = this.getTileEntity();
@@ -53,6 +65,15 @@ public abstract class CraftTileInventoryConverter implements CraftInventoryCreat
             return furnace;
         }
 
+        // Paper start
+        @Override
+        public Inventory createInventory(InventoryHolder owner, InventoryType type, net.kyori.adventure.text.Component title) {
+            Container tileEntity = getTileEntity();
+            ((AbstractFurnaceBlockEntity) tileEntity).setCustomName(io.papermc.paper.adventure.PaperAdventure.asVanilla(title));
+            return getInventory(tileEntity);
+        }
+        // Paper end
+
         @Override
         public Inventory createInventory(InventoryHolder owner, InventoryType type, String title) {
             Container tileEntity = this.getTileEntity();
@@ -73,6 +94,18 @@ public abstract class CraftTileInventoryConverter implements CraftInventoryCreat
             return new BrewingStandBlockEntity(BlockPos.ZERO, Blocks.BREWING_STAND.defaultBlockState());
         }
 
+        // Paper start
+        @Override
+        public Inventory createInventory(InventoryHolder owner, InventoryType type, net.kyori.adventure.text.Component title) {
+            // BrewingStand does not extend TileEntityLootable
+            Container tileEntity = getTileEntity();
+            if (tileEntity instanceof BrewingStandBlockEntity) {
+                ((BrewingStandBlockEntity) tileEntity).setCustomName(io.papermc.paper.adventure.PaperAdventure.asVanilla(title));
+            }
+            return getInventory(tileEntity);
+        }
+        // Paper end
+
         @Override
         public Inventory createInventory(InventoryHolder holder, InventoryType type, String title) {
             // BrewingStand does not extend TileEntityLootable
diff --git a/src/main/java/org/bukkit/craftbukkit/map/CraftMapRenderer.java b/src/main/java/org/bukkit/craftbukkit/map/CraftMapRenderer.java
index b47f18b1e448807a17ca9f2ae9609680233da837..9683d7d103af66fffd68c11abc38fb4fd2f99482 100644
--- a/src/main/java/org/bukkit/craftbukkit/map/CraftMapRenderer.java
+++ b/src/main/java/org/bukkit/craftbukkit/map/CraftMapRenderer.java
@@ -42,7 +42,7 @@ public class CraftMapRenderer extends MapRenderer {
             }
 
             MapDecoration decoration = worldMap.decorations.get(key);
-            cursors.addCursor(decoration.getX(), decoration.getY(), (byte) (decoration.getRot() & 15), decoration.getType().getIcon(), true, CraftChatMessage.fromComponent(decoration.getName()));
+            cursors.addCursor(decoration.getX(), decoration.getY(), (byte) (decoration.getRot() & 15), decoration.getType().getIcon(), true, decoration.getName() == null ? null : io.papermc.paper.adventure.PaperAdventure.asAdventure(decoration.getName())); // Paper
         }
     }
 
diff --git a/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftObjective.java b/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftObjective.java
index 0d25c7c03f7ac21a4b21bb95b5bd921c43430cf9..b7f0277b50a0f45c32b818bf9fe1218874aa8533 100644
--- a/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftObjective.java
+++ b/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftObjective.java
@@ -31,6 +31,21 @@ final class CraftObjective extends CraftScoreboardComponent implements Objective
         return this.objective.getName();
     }
 
+    // Paper start
+    @Override
+    public net.kyori.adventure.text.Component displayName() throws IllegalStateException {
+        CraftScoreboard scoreboard = checkState();
+        return io.papermc.paper.adventure.PaperAdventure.asAdventure(objective.getDisplayName());
+    }
+    @Override
+    public void displayName(net.kyori.adventure.text.Component displayName) throws IllegalStateException, IllegalArgumentException {
+        if (displayName == null) {
+            displayName = net.kyori.adventure.text.Component.empty();
+        }
+        CraftScoreboard scoreboard = checkState();
+        objective.setDisplayName(io.papermc.paper.adventure.PaperAdventure.asVanilla(displayName));
+    }
+    // Paper end
     @Override
     public String getDisplayName() throws IllegalStateException {
         CraftScoreboard scoreboard = this.checkState();
diff --git a/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftScoreboard.java b/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftScoreboard.java
index c624867e28dd5187d58a6bcb9067b0c10ff7e733..f367261b119ab48c1d17b2b6552cce481c6effbb 100644
--- a/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftScoreboard.java
+++ b/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftScoreboard.java
@@ -28,6 +28,34 @@ public final class CraftScoreboard implements org.bukkit.scoreboard.Scoreboard {
     public CraftObjective registerNewObjective(String name, String criteria) throws IllegalArgumentException {
         return this.registerNewObjective(name, criteria, name);
     }
+    // Paper start
+    @Override
+    public CraftObjective registerNewObjective(String name, String criteria, net.kyori.adventure.text.Component displayName) {
+        return registerNewObjective(name, CraftCriteria.getFromBukkit(criteria), displayName, RenderType.INTEGER);
+    }
+    @Override
+    public CraftObjective registerNewObjective(String name, String criteria, net.kyori.adventure.text.Component displayName, RenderType renderType) {
+        return registerNewObjective(name, CraftCriteria.getFromBukkit(criteria), displayName, renderType);
+    }
+    @Override
+    public CraftObjective registerNewObjective(String name, Criteria criteria, net.kyori.adventure.text.Component displayName) throws IllegalArgumentException {
+        return registerNewObjective(name, criteria, displayName, RenderType.INTEGER);
+    }
+    @Override
+    public CraftObjective registerNewObjective(String name, Criteria criteria, net.kyori.adventure.text.Component displayName, RenderType renderType) throws IllegalArgumentException {
+        if (displayName == null) {
+            displayName = net.kyori.adventure.text.Component.empty();
+        }
+        Validate.notNull(name, "Objective name cannot be null");
+        Validate.notNull(criteria, "Criteria cannot be null");
+        Validate.notNull(displayName, "Display name cannot be null");
+        Validate.notNull(renderType, "RenderType cannot be null");
+        Validate.isTrue(name.length() <= Short.MAX_VALUE, "The name '" + name + "' is longer than the limit of 32767 characters");
+        Validate.isTrue(board.getObjective(name) == null, "An objective of name '" + name + "' already exists");
+        net.minecraft.world.scores.Objective objective = board.addObjective(name, ((CraftCriteria) criteria).criteria, io.papermc.paper.adventure.PaperAdventure.asVanilla(displayName), CraftScoreboardTranslations.fromBukkitRender(renderType));
+        return new CraftObjective(this, objective);
+    }
+    // Paper end
 
     @Override
     public CraftObjective registerNewObjective(String name, String criteria, String displayName) throws IllegalArgumentException {
@@ -46,16 +74,7 @@ public final class CraftScoreboard implements org.bukkit.scoreboard.Scoreboard {
 
     @Override
     public CraftObjective registerNewObjective(String name, Criteria criteria, String displayName, RenderType renderType) throws IllegalArgumentException {
-        Validate.notNull(name, "Objective name cannot be null");
-        Validate.notNull(criteria, "Criteria cannot be null");
-        Validate.notNull(displayName, "Display name cannot be null");
-        Validate.notNull(renderType, "RenderType cannot be null");
-        Validate.isTrue(name.length() <= Short.MAX_VALUE, "The name '" + name + "' is longer than the limit of 32767 characters");
-        Validate.isTrue(displayName.length() <= 128, "The display name '" + displayName + "' is longer than the limit of 128 characters");
-        Validate.isTrue(this.board.getObjective(name) == null, "An objective of name '" + name + "' already exists");
-
-        net.minecraft.world.scores.Objective objective = this.board.addObjective(name, ((CraftCriteria) criteria).criteria, CraftChatMessage.fromStringOrNull(displayName), CraftScoreboardTranslations.fromBukkitRender(renderType));
-        return new CraftObjective(this, objective);
+        return registerNewObjective(name, criteria, net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(displayName), renderType); // Paper
     }
 
     @Override
diff --git a/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftTeam.java b/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftTeam.java
index 81f16dc1ed6e102af298600db75cab21a09bc00f..18d5a26c34c848241c306241b3ad9825b5a0b9a9 100644
--- a/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftTeam.java
+++ b/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftTeam.java
@@ -28,6 +28,63 @@ final class CraftTeam extends CraftScoreboardComponent implements Team {
 
         return this.team.getName();
     }
+    // Paper start
+    @Override
+    public net.kyori.adventure.text.Component displayName() throws IllegalStateException {
+        CraftScoreboard scoreboard = checkState();
+        return io.papermc.paper.adventure.PaperAdventure.asAdventure(team.getDisplayName());
+    }
+    @Override
+    public void displayName(net.kyori.adventure.text.Component displayName) throws IllegalStateException, IllegalArgumentException {
+        if (displayName == null) displayName = net.kyori.adventure.text.Component.empty();
+        CraftScoreboard scoreboard = checkState();
+        team.setDisplayName(io.papermc.paper.adventure.PaperAdventure.asVanilla(displayName));
+    }
+    @Override
+    public net.kyori.adventure.text.Component prefix() throws IllegalStateException {
+        CraftScoreboard scoreboard = checkState();
+        return io.papermc.paper.adventure.PaperAdventure.asAdventure(team.getPlayerPrefix());
+    }
+    @Override
+    public void prefix(net.kyori.adventure.text.Component prefix) throws IllegalStateException, IllegalArgumentException {
+        if (prefix == null) prefix = net.kyori.adventure.text.Component.empty();
+        CraftScoreboard scoreboard = checkState();
+        team.setPlayerPrefix(io.papermc.paper.adventure.PaperAdventure.asVanilla(prefix));
+    }
+    @Override
+    public net.kyori.adventure.text.Component suffix() throws IllegalStateException {
+        CraftScoreboard scoreboard = checkState();
+        return io.papermc.paper.adventure.PaperAdventure.asAdventure(team.getPlayerSuffix());
+    }
+    @Override
+    public void suffix(net.kyori.adventure.text.Component suffix) throws IllegalStateException, IllegalArgumentException {
+        if (suffix == null) suffix = net.kyori.adventure.text.Component.empty();
+        CraftScoreboard scoreboard = checkState();
+        team.setPlayerSuffix(io.papermc.paper.adventure.PaperAdventure.asVanilla(suffix));
+    }
+    @Override
+    public boolean hasColor() {
+        CraftScoreboard scoreboard = checkState();
+        return this.team.getColor().getColor() != null;
+    }
+    @Override
+    public net.kyori.adventure.text.format.TextColor color() throws IllegalStateException {
+        CraftScoreboard scoreboard = checkState();
+        if (team.getColor().getColor() == null) throw new IllegalStateException("Team colors must have hex values");
+        net.kyori.adventure.text.format.TextColor color = net.kyori.adventure.text.format.TextColor.color(team.getColor().getColor());
+        if (!(color instanceof net.kyori.adventure.text.format.NamedTextColor)) throw new IllegalStateException("Team doesn't have a NamedTextColor");
+        return (net.kyori.adventure.text.format.NamedTextColor) color;
+    }
+    @Override
+    public void color(net.kyori.adventure.text.format.NamedTextColor color) {
+        CraftScoreboard scoreboard = checkState();
+        if (color == null) {
+            this.team.setColor(net.minecraft.ChatFormatting.RESET);
+        } else {
+            this.team.setColor(io.papermc.paper.adventure.PaperAdventure.asVanilla(color));
+        }
+    }
+    // Paper end
 
     @Override
     public String getDisplayName() throws IllegalStateException {
diff --git a/src/main/java/org/bukkit/craftbukkit/util/CraftChatMessage.java b/src/main/java/org/bukkit/craftbukkit/util/CraftChatMessage.java
index 78ea79b66cc9e90402ef5cdc2e5e04e0c74b1c26..4fede2161792ba3e7cdf0cc5a1f533188becc6f7 100644
--- a/src/main/java/org/bukkit/craftbukkit/util/CraftChatMessage.java
+++ b/src/main/java/org/bukkit/craftbukkit/util/CraftChatMessage.java
@@ -291,6 +291,7 @@ public final class CraftChatMessage {
 
     public static String fromComponent(Component component) {
         if (component == null) return "";
+        if (component instanceof io.papermc.paper.adventure.AdventureComponent) component = ((io.papermc.paper.adventure.AdventureComponent) component).deepConverted();
         StringBuilder out = new StringBuilder();
 
         boolean hadFormat = false;
diff --git a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
index d805ac4274fb6149bf8efea6b771ecfe79aea76f..56a3dc9dcbd2229c60aa64e2d4c0ed147539a5ef 100644
--- a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
+++ b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
@@ -69,6 +69,38 @@ public final class CraftMagicNumbers implements UnsafeValues {
 
     private CraftMagicNumbers() {}
 
+    // Paper start
+    @Override
+    public net.kyori.adventure.text.flattener.ComponentFlattener componentFlattener() {
+        return io.papermc.paper.adventure.PaperAdventure.FLATTENER;
+    }
+
+    @Override
+    public net.kyori.adventure.text.serializer.gson.GsonComponentSerializer colorDownsamplingGsonComponentSerializer() {
+        return net.kyori.adventure.text.serializer.gson.GsonComponentSerializer.colorDownsamplingGson();
+    }
+
+    @Override
+    public net.kyori.adventure.text.serializer.gson.GsonComponentSerializer gsonComponentSerializer() {
+        return net.kyori.adventure.text.serializer.gson.GsonComponentSerializer.gson();
+    }
+
+    @Override
+    public net.kyori.adventure.text.serializer.plain.PlainComponentSerializer plainComponentSerializer() {
+        return io.papermc.paper.adventure.PaperAdventure.PLAIN;
+    }
+
+    @Override
+    public net.kyori.adventure.text.serializer.plain.PlainTextComponentSerializer plainTextSerializer() {
+        return net.kyori.adventure.text.serializer.plain.PlainTextComponentSerializer.plainText();
+    }
+
+    @Override
+    public net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer legacyComponentSerializer() {
+        return net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection();
+    }
+    // Paper end
+
     public static BlockState getBlock(MaterialData material) {
         return CraftMagicNumbers.getBlock(material.getItemType(), material.getData());
     }
diff --git a/src/main/java/org/bukkit/craftbukkit/util/LazyHashSet.java b/src/main/java/org/bukkit/craftbukkit/util/LazyHashSet.java
index 62c66e3179b9557cdba46242df0fb15bce7e7710..73a37638abacdffbff8274291a64ea6cd0be7a5e 100644
--- a/src/main/java/org/bukkit/craftbukkit/util/LazyHashSet.java
+++ b/src/main/java/org/bukkit/craftbukkit/util/LazyHashSet.java
@@ -80,7 +80,7 @@ public abstract class LazyHashSet<E> implements Set<E> {
         return this.reference = this.makeReference();
     }
 
-    abstract Set<E> makeReference();
+    protected abstract Set<E> makeReference(); // Paper - protected
 
     public boolean isLazy() {
         return this.reference == null;
diff --git a/src/main/java/org/bukkit/craftbukkit/util/LazyPlayerSet.java b/src/main/java/org/bukkit/craftbukkit/util/LazyPlayerSet.java
index 838d5b877c01be3ef353f434d98e27b46c0a3fb4..5c4c0ba05f10d2d83b22d3e86805cfa85c3b50a9 100644
--- a/src/main/java/org/bukkit/craftbukkit/util/LazyPlayerSet.java
+++ b/src/main/java/org/bukkit/craftbukkit/util/LazyPlayerSet.java
@@ -15,11 +15,17 @@ public class LazyPlayerSet extends LazyHashSet<Player> {
     }
 
     @Override
-    HashSet<Player> makeReference() {
+    protected HashSet<Player> makeReference() { // Paper - protected
         if (reference != null) {
             throw new IllegalStateException("Reference already created!");
         }
         List<ServerPlayer> players = this.server.getPlayerList().players;
+        // Paper start
+        return makePlayerSet(this.server);
+    }
+    public static HashSet<Player> makePlayerSet(final MinecraftServer server) {
+        // Paper end
+        List<ServerPlayer> players = server.getPlayerList().players;
         HashSet<Player> reference = new HashSet<Player>(players.size());
         for (ServerPlayer player : players) {
             reference.add(player.getBukkitEntity());
diff --git a/src/main/resources/META-INF/services/net.kyori.adventure.text.logger.slf4j.ComponentLoggerProvider b/src/main/resources/META-INF/services/net.kyori.adventure.text.logger.slf4j.ComponentLoggerProvider
new file mode 100644
index 0000000000000000000000000000000000000000..399bde6e57cd82b50d3ebe0f51a3958fa2d52d43
--- /dev/null
+++ b/src/main/resources/META-INF/services/net.kyori.adventure.text.logger.slf4j.ComponentLoggerProvider
@@ -0,0 +1 @@
+io.papermc.paper.adventure.providers.ComponentLoggerProviderImpl
diff --git a/src/main/resources/META-INF/services/net.kyori.adventure.text.minimessage.MiniMessage$Provider b/src/main/resources/META-INF/services/net.kyori.adventure.text.minimessage.MiniMessage$Provider
new file mode 100644
index 0000000000000000000000000000000000000000..6ce632b6c9dc5e4b3b978331df51c0ffd1526471
--- /dev/null
+++ b/src/main/resources/META-INF/services/net.kyori.adventure.text.minimessage.MiniMessage$Provider
@@ -0,0 +1 @@
+io.papermc.paper.adventure.providers.MiniMessageProviderImpl
diff --git a/src/main/resources/META-INF/services/net.kyori.adventure.text.serializer.gson.GsonComponentSerializer$Provider b/src/main/resources/META-INF/services/net.kyori.adventure.text.serializer.gson.GsonComponentSerializer$Provider
new file mode 100644
index 0000000000000000000000000000000000000000..bc9f7398a0fe158af05b562a8ded9e74a22eae9b
--- /dev/null
+++ b/src/main/resources/META-INF/services/net.kyori.adventure.text.serializer.gson.GsonComponentSerializer$Provider
@@ -0,0 +1 @@
+io.papermc.paper.adventure.providers.GsonComponentSerializerProviderImpl
diff --git a/src/main/resources/META-INF/services/net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer$Provider b/src/main/resources/META-INF/services/net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer$Provider
new file mode 100644
index 0000000000000000000000000000000000000000..820f381981a91754b7f0c5106f93b773d885e321
--- /dev/null
+++ b/src/main/resources/META-INF/services/net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer$Provider
@@ -0,0 +1 @@
+io.papermc.paper.adventure.providers.LegacyComponentSerializerProviderImpl
diff --git a/src/main/resources/META-INF/services/net.kyori.adventure.text.serializer.plain.PlainTextComponentSerializer$Provider b/src/main/resources/META-INF/services/net.kyori.adventure.text.serializer.plain.PlainTextComponentSerializer$Provider
new file mode 100644
index 0000000000000000000000000000000000000000..28d777610b52ba74f808bf3245d73b8333d01fa7
--- /dev/null
+++ b/src/main/resources/META-INF/services/net.kyori.adventure.text.serializer.plain.PlainTextComponentSerializer$Provider
@@ -0,0 +1 @@
+io.papermc.paper.adventure.providers.PlainTextComponentSerializerProviderImpl
diff --git a/src/test/java/io/papermc/paper/adventure/ComponentServicesTest.java b/src/test/java/io/papermc/paper/adventure/ComponentServicesTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..b6c4f8e2d375396a0ef3300a8bc324d77f23a768
--- /dev/null
+++ b/src/test/java/io/papermc/paper/adventure/ComponentServicesTest.java
@@ -0,0 +1,23 @@
+package io.papermc.paper.adventure;
+
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.format.NamedTextColor;
+import net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer;
+import net.kyori.adventure.text.serializer.plain.PlainTextComponentSerializer;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+public class ComponentServicesTest {
+
+    @Test
+    public void testPlainTextComponentSerializerProvider() {
+        assertEquals("Done", PlainTextComponentSerializer.plainText().serialize(Component.translatable("narrator.loading.done")));
+    }
+
+    @Test
+    public void testLegacyComponentSerializerProvider() {
+        assertEquals("§cDone", LegacyComponentSerializer.legacySection().serialize(Component.translatable("narrator.loading.done", NamedTextColor.RED)));
+        assertEquals("&cDone", LegacyComponentSerializer.legacyAmpersand().serialize(Component.translatable("narrator.loading.done", NamedTextColor.RED)));
+    }
+}