Update canonical Gitea links

Soft fork of upstream TAB at 93cfd74, versioned 5.9.9 for Purpur 1.19.4
serving 1.8-1.21.11 clients through ViaVersion/ViaBackwards/ViaRewind.

- Build only Bukkit v1_19_R3, BungeeCord, and Velocity; drop Fabric,
  Forge, NeoForge, and unused NMS modules
- LuckPerms 5.5 (Vault removed), GraalVM JDK 17, one shaded JAR
- Vanish-OG and AFK-OG compatibility, legacy scoreboard team colors,
  disabled scoreboard number formats
- Legacy (1.8-1.12.2) floating nametags: rank brackets dropped, AFK
  badge bolded everywhere, bold rank kept only when the whole tag can
  render bold (legacy width calc counts post-paragraph-l glyphs as bold
  and never receives paragraph-r, else phantom pixels pad the tag end);
  needs ViaBackwards add-teamcolor-to-prefix: false
- Ship live TrueOG Network config values

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01N82WDRsXtPi7iRxx1wypXW

.gitattributes

@@ -0,0 +1,8 @@
+* text=auto
+
+*.sh text eol=lf
+gradlew text eol=lf
+*.bat text eol=crlf
+
+*.jar binary
+.gitea/CODEOWNERS linguist-detectable=false

.gitea/CODEOWNERS

@@ -0,0 +1,3 @@
+# Pull requests request review from the eligible staff team(s).
+# One approval from either an Admin or Developer satisfies branch protection.
+*   @trueog/Admins @trueog/Developers

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,28 +0,0 @@
----
-name: Bug report
-about: Report a bug
-title: ''
-labels: ''
-assignees: ''
-
----
-
-**Server version**
-
-
-**Plugin version** ("latest" is not a version)
-
-
-**Describe the bug**
-
-
-**How to reproduce**
-
-
-**Expected behavior**
-
-
-**Actual behavior**
-
-
-**Additional info** (errors, screenshots, ...)

.gitignore

@@ -1,8 +1,7 @@
 # Compiled class file
 *.class
-/bin/
-/target/
-/src/test/
+bin/
+target/
 
 # Log file
 *.log
@@ -31,8 +30,13 @@ hs_err_pid*
 .project
 
 # intellij
-/.idea/
+.idea/
 
 # other
-.gitattributes
-*.iml
+*.iml
+run/
+
+# Gradle
+.gradle/
+build/
+!gradle/wrapper/gradle-wrapper.jar

CONTRIBUTING.md

@@ -0,0 +1,12 @@
+If this plugin has helped you in any way, and you would like to return something back 
+to make the plugin even better, there is a lot of ways to contribute:  
+* Open a **pull request** containing a new feature or a bug fix, which you believe many users will benefit from.
+* Make detailed high-quality **bug reports**. The difference between a bug getting fixed in 1 week vs 1 hour 
+is in quality of the report (typically providing correct steps to reproduce that actually work).
+* Test **experimental builds**, which can be found in [GitHub Actions](https://github.com/NEZNAMY/TAB/actions) for problems of any kind including bugs. 
+This way you will help make the actual releases more stable / help get stable releases sooner.
+* Help improve the wiki by opening a [Wiki change issue](https://github.com/NEZNAMY/TAB/issues/new?assignees=&labels=Wiki&template=wiki_change.yml), 
+where you can improve existing descriptions, add information you found missing, fix typos / grammar mistakes or add more examples.
+* Create spark reports and then send them to me. I will analyze them and try to find optimizations to make the plugin run faster. Commands:
+  * `/spark profiler start --timeout 300 --thread * --interval 0.1`
+  * `/spark profiler start --timeout 300 --thread * --interval 0.1 --alloc`

LICENSE

@@ -1,4 +1,4 @@
-Apache License
+                                 Apache License
                            Version 2.0, January 2004
                         http://www.apache.org/licenses/
 
@@ -172,30 +172,3 @@ Apache License
       defend, and hold each Contributor harmless for any liability
       incurred by, or claims asserted against, such Contributor by reason
       of your accepting any such warranty or additional liability.
-
-   END OF TERMS AND CONDITIONS
-
-   APPENDIX: How to apply the Apache License to your work.
-
-      To apply the Apache License to your work, attach the following
-      boilerplate notice, with the fields enclosed by brackets "[]"
-      replaced with your own identifying information. (Don't include
-      the brackets!)  The text should be enclosed in the appropriate
-      comment syntax for the file format. We also recommend that a
-      file or class name and description of purpose be included on the
-      same "printed page" as the copyright notice for easier
-      identification within third-party archives.
-
-   Copyright [yyyy] [name of copyright owner]
-
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.

README.md

@@ -1,49 +1,27 @@
-## Introduction  
-Here it is. After countless requests to go opensource, I did it to make those people quiet. It worked.  
-It's already been a year and I still can't see any positives of it. This way I just made it easier for everyone to make a plugin as good, so people can stop using it and switch to something better. 
-  
-  
-## Compiling
-Plugin can be compiled using maven.
+# TAB-OG
 
-  
-## Premium code
-The source contains content of premium version as well. However, this must be activated by setting [this line to return true](https://github.com/NEZNAMY/TAB/blob/master/src/main/java/me/neznamy/tab/shared/TAB.java#L79).  
-  
-  
-## Links
-Free version  
-    Spigot (releases): https://www.spigotmc.org/resources/57806/  
-    Pre-releases https://github.com/NEZNAMY/TAB/releases  
-Premium version  
-    Polymart (releases): https://polymart.org/resource/484  
-    MC-Market (releases): https://www.mc-market.org/resources/14009/  
-    Pre-releases on discord for verified buyers  
-Bukkit bridge https://www.spigotmc.org/resources/83966/  
-Wiki https://github.com/NEZNAMY/TAB/wiki  
-Discord invite link: https://discord.gg/EaSvdk6  
-  
-  
-## Downloads
-Official release: https://www.spigotmc.org/resources/57806/  
-Pre-releases: https://github.com/NEZNAMY/TAB/releases  
-  
-  
-## Maven Repository
-```
-<repositories>
-  <repository>
-    <id>jitpack.io</id>
-    <url>https://jitpack.io</url>
-  </repository>
-</repositories>
+TAB-OG is a soft fork of [TAB](https://github.com/NEZNAMY/TAB) for
+[TrueOG Network](https://true-og.net/), based on upstream commit `93cfd74`.
 
-<dependencies>
-  <!-- TAB -->
-  <dependency>
-    <groupId>com.github.NEZNAMY</groupId>
-    <artifactId>TAB-API</artifactId>
-    <version>2.8.10</version>
-  </dependency>
-</dependencies>
- ```
+Differences from upstream TAB:
+- Versioned `5.9.9` (upstream is on `6.x`), targeting Purpur 1.19.4 serving 1.8–1.21.11
+  clients through ViaVersion, ViaBackwards, and ViaRewind.
+- Builds only Bukkit `v1_19_R3`, BungeeCord, and Velocity; drops Fabric, Forge, NeoForge,
+  and the unused Bukkit/Paper NMS modules.
+- Uses LuckPerms `5.5` (Vault removed) with a GraalVM JDK 17 toolchain, producing one
+  universal shaded JAR.
+- TrueOG compatibility fixes: [Vanish-OG](https://git.trueog.net/trueog/Vanish-OG), the
+  [AFK-OG](https://git.trueog.net/trueog/AFK-OG) indicator, legacy scoreboard team colors,
+  and disabled scoreboard number formats.
+- Legacy (1.8–1.12.2) nametag rendering: over-head names drop the rank brackets (the
+  tablist keeps them), sit one space after the rank in its color, bold the AFK indicator
+  for every client, and fit within the 16-character team prefix/suffix limits. A bold
+  rank is kept only when the whole tag can render bold — legacy clients width-count
+  everything after `§l` as bold and never receive a `§r`, so a plain-rendered name after
+  a bold rank pads the nametag end with phantom pixels; when it cannot fit, bold is
+  stripped over-head. Keeping bold requires `add-teamcolor-to-prefix: false` in the
+  ViaBackwards config, otherwise the appended team color un-bolds the name again.
+- Ships live TrueOG Network config values.
+
+Build with `./gradlew build` (JAR in `jar/build/libs/`). Requires LuckPerms; bold legacy
+nametags additionally require ViaBackwards with `add-teamcolor-to-prefix: false`.

SECURITY.md

@@ -0,0 +1,2 @@
+# Security Policy
+If you found a security issue, send me a private message anywhere.

api/build.gradle.kts

@@ -0,0 +1,7 @@
+dependencies {
+    compileOnlyApi("org.jetbrains:annotations:26.0.2")
+}
+
+tasks.javadoc {
+    enabled = project.hasProperty("enable-javadoc")
+}

api/src/main/java/me/neznamy/tab/api/TabAPI.java

@@ -0,0 +1,135 @@
+package me.neznamy.tab.api;
+
+import java.util.UUID;
+
+import lombok.NonNull;
+import lombok.Setter;
+import me.neznamy.tab.api.bossbar.BossBarManager;
+import me.neznamy.tab.api.event.EventBus;
+import me.neznamy.tab.api.placeholder.PlaceholderManager;
+import me.neznamy.tab.api.scoreboard.ScoreboardManager;
+import me.neznamy.tab.api.tablist.SortingManager;
+import me.neznamy.tab.api.tablist.HeaderFooterManager;
+import me.neznamy.tab.api.tablist.TabListFormatManager;
+import me.neznamy.tab.api.nametag.NameTagManager;
+import me.neznamy.tab.api.tablist.layout.LayoutManager;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * The primary API class to get instances of other API classes
+ */
+public abstract class TabAPI {
+
+    /** Instance of the API */
+    @Setter private static TabAPI instance;
+
+    /**
+     * Returns API instance. If instance was not set by the plugin, throws
+     * {@code IllegalStateException}. This is usually caused by shading the API
+     * into own project, which is not allowed. Another option is calling the method
+     * before plugin was able to load.
+     *
+     * @return  API instance
+     * @throws  IllegalStateException
+     *          If instance is {@code null}
+     */
+    public static @NotNull TabAPI getInstance() {
+        if (instance == null) throw new IllegalStateException("The API instance is null. This can have 2 possible causes: \n" +
+                "#1 - API was called before TAB was loaded. This means your plugin was loaded before TAB was. To make sure your " +
+                "plugin loads after TAB, add it as a depend or soft depend of your plugin.\n" +
+                "#2 - You shaded TAB's classes into your plugin, instead of only using them. This is not allowed. To verify this " +
+                "is your case, unzip your plugin and check for TAB's classes. If they are there, you will need to fix your compiler " +
+                "to not include them, such as scope provided for maven compilation.");
+        return instance;
+    }
+
+    /**
+     * Returns player object from given UUID
+     *
+     * @param   id
+     *          Player UUID
+     * @return  player object from given UUID
+     */
+    public abstract @Nullable TabPlayer getPlayer(@NonNull UUID id);
+
+    /**
+     * Returns player object from given name
+     *
+     * @param   name
+     *          Player name
+     * @return  player object from given name
+     */
+    public abstract @Nullable TabPlayer getPlayer(@NonNull String name);
+
+    /**
+     * Returns collection of all online players. Will return empty list if plugin is disabled (due to a broken configuration file for example).
+     *
+     * @return  collection of online players
+     */
+    public abstract @NotNull TabPlayer[] getOnlinePlayers();
+
+    /**
+     * Return BossBar manager instance if the feature is enabled. If not, returns {@code null}.
+     *
+     * @return  BossBar manager
+     */
+    public abstract @Nullable BossBarManager getBossBarManager();
+
+    /**
+     * Returns scoreboard manager instance if the feature is enabled. If not, returns {@code null}.
+     *
+     * @return  scoreboard manager
+     */
+    public abstract @Nullable ScoreboardManager getScoreboardManager();
+
+    /**
+     * Returns team manager instance if the feature is enabled. If not, returns {@code null}.
+     *
+     * @return  team manager
+     */
+    public abstract @Nullable NameTagManager getNameTagManager();
+
+    /**
+     * Returns header/footer manager instance if the feature is enabled. If not, returns {@code null}.
+     *
+     * @return  Header/footer manager
+     */
+    public abstract @Nullable HeaderFooterManager getHeaderFooterManager();
+
+    /**
+     * Returns PlaceholderManager instance
+     *
+     * @return  PlaceholderManager instance
+     */
+    public abstract @NotNull PlaceholderManager getPlaceholderManager();
+
+    /**
+     * Returns TabList name format manager instance if the feature is enabled. If not, returns {@code null}.
+     *
+     * @return  TabList name format manager
+     */
+    public abstract @Nullable TabListFormatManager getTabListFormatManager();
+
+    /**
+     * Returns Layout manager instance if the feature is enabled. If not, returns {@code null}.
+     *
+     * @return  Layout manager
+     */
+    public abstract @Nullable LayoutManager getLayoutManager();
+
+    /**
+     * Returns Sorting manager instance if at least one feature capable of sorting players is enabled.
+     * If not, returns {@code null}.
+     *
+     * @return  Sorting manager
+     */
+    public abstract @Nullable SortingManager getSortingManager();
+
+    /**
+     * Gets the event bus for registering listeners for TAB events.
+     *
+     * @return  the event bus
+     */
+    public abstract @Nullable EventBus getEventBus();
+}

api/src/main/java/me/neznamy/tab/api/TabPlayer.java

@@ -0,0 +1,125 @@
+package me.neznamy.tab.api;
+
+import lombok.NonNull;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.UUID;
+
+/**
+ * An interface representing a player
+ */
+@SuppressWarnings("unused") // API class
+public interface TabPlayer {
+
+    /**
+     * Returns player's name
+     *
+     * @return  Player's name
+     */
+    @NotNull
+    String getName();
+
+    /**
+     * Returns player's UUID
+     *
+     * @return  Player's UUID
+     */
+    @NotNull
+    UUID getUniqueId();
+
+    /**
+     * Returns platform-specific entity
+     *
+     * @return  platform's player object
+     */
+    @NotNull
+    Object getPlayer();
+
+    /**
+     * Returns true once the player is successfully loaded (onJoin method ran through all methods)
+     *
+     * @return  {@code true} if player is fully loaded, {@code false} otherwise
+     */
+    boolean isLoaded();
+
+    /**
+     * Returns player's primary permission group. If group has been changed using
+     * {@link #setTemporaryGroup(String)}, returns that value. Otherwise, returns group
+     * detected by standard group assign logic
+     *
+     * @return  player's primary permission group
+     */
+    @NotNull
+    String getGroup();
+
+    /**
+     * Temporarily overrides player's group and applies all changes coming from new group.
+     * This includes all properties and sorting, if used.
+     * Set to {@code null} to reset back.
+     *
+     * @param   group
+     *          New group to use
+     * @see     #hasTemporaryGroup()
+     */
+    void setTemporaryGroup(@Nullable String group);
+
+    /**
+     * Returns {@code true} if a temporary group was applied to the player using {@link #setTemporaryGroup(String)}.
+     * If no group was set, returns {@code false}
+     *
+     * @return  {@code true} if group is set, {@code false} if not
+     * @see     #setTemporaryGroup(String)
+     */
+    boolean hasTemporaryGroup();
+
+    /**
+     * Changes expected profile name of the player. This adapts all name-bound features
+     * to use this new profile name if another plugin changed profile name of the player. <p>
+     * Automatic profile name change detection is available on Bukkit, BungeeCord and Fabric,
+     * therefore using this is redundant there. This function is only needed on Velocity,
+     * where the detection is not available. <p>
+     * Warning: This function does NOT change player's profile name, it only updates the tracked
+     * name inside the plugin.
+     *
+     * @param   profileName
+     *          New expected profile name
+     */
+    void setExpectedProfileName(@NonNull String profileName);
+
+    /**
+     * Returns player's expected profile name. This defaults to player's username, but may
+     * get changed by other plugins and then detected by TAB.
+     *
+     * @return  Player's expected profile name
+     */
+    @NotNull
+    String getExpectedProfileName();
+
+    /**
+     * Returns name of the server the player is connected to.
+     * This requires TAB on proxy.
+     * On backend installation, this method returns {@code "N/A"}.
+     *
+     * @return  Player's server on proxy or {@code "N/A"} on backend installation
+     */
+    @NotNull
+    String getServer();
+
+    /**
+     * Returns name of the world the player is in.
+     * On proxy installation, TAB-Bridge must be installed to forward this info to the proxy.
+     * Otherwise, it will return {@code "N/A"}.
+     *
+     * @return  Player's world or {@code "N/A"} on proxy installation without TAB-Bridge installed
+     */
+    @NotNull
+    String getWorld();
+
+    /**
+     * Returns {@code true} if this player is a bedrock player, {@code false} if not.
+     *
+     * @return  {@code true} if this player is a bedrock player, {@code false} if not
+     */
+    boolean isBedrockPlayer();
+}

api/src/main/java/me/neznamy/tab/api/bossbar/BarColor.java

@@ -0,0 +1,30 @@
+package me.neznamy.tab.api.bossbar;
+
+/**
+ * An enum representing all available BossBar colors.
+ * Calling ordinal() will return color's network ID.
+ */
+@SuppressWarnings("unused") // API class
+public enum BarColor {
+
+    /** Pink color */
+    PINK,
+
+    /** Blue color */
+    BLUE,
+
+    /** Red color */
+    RED,
+
+    /** Green color */
+    GREEN,
+
+    /** Yellow color */
+    YELLOW,
+
+    /** Purple color */
+    PURPLE,
+
+    /** White color */
+    WHITE
+}

api/src/main/java/me/neznamy/tab/api/bossbar/BarStyle.java

@@ -0,0 +1,24 @@
+package me.neznamy.tab.api.bossbar;
+
+/**
+ * An enum representing all available BossBar styles.
+ * Calling ordinal() will return style's network ID.
+ */
+@SuppressWarnings("unused") // API class
+public enum BarStyle {
+
+    /** Fully solid line */
+    PROGRESS,
+
+    /** Line segmented into 6 parts */
+    NOTCHED_6,
+
+    /** Line segmented into 10 parts */
+    NOTCHED_10,
+
+    /** Line segmented into 12 parts */
+    NOTCHED_12,
+
+    /** Line segmented into 20 parts */
+    NOTCHED_20
+}

api/src/main/java/me/neznamy/tab/api/bossbar/BossBar.java

@@ -0,0 +1,213 @@
+package me.neznamy.tab.api.bossbar;
+
+import java.util.List;
+import java.util.UUID;
+
+import lombok.NonNull;
+import me.neznamy.tab.api.TabPlayer;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * An interface representing a BossBar line.
+ * <p>
+ * It uses 1.9+ BossBar feature, allowing configurable styles
+ * and colors, as well as display several bars at once. Limit of maximum 
+ * displayed BossBars depends on client resolution and GUI scale, up to
+ * 9 concurrent BossBars displayed at once.
+ */
+public interface BossBar {
+
+    /**
+     * Returns name of this BossBar. If it was defined in config, returns
+     * the name specified in config. If it was made using the API, returns
+     * randomly generated ID given to this BossBar when creating.
+     *
+     * @return  name of BossBar
+     */
+    @NotNull String getName();
+
+    /**
+     * Returns randomly generated uuid of this BossBar used internally to match
+     * the BossBar in client with packets or with Bukkit API BossBar instances.
+     *
+     * @return  uuid of this BossBar
+     */
+    @NotNull UUID getUniqueId();
+
+    /**
+     * Changes BossBar title to specified string, supporting placeholders.
+     * <p>
+     * If title contains new placeholders not used before, they are registered using
+     * standard registration logic and refreshed periodically. No need to call
+     * this method to try to keep placeholder values up to date.
+     * <p>
+     * If specified title is equal to the current one, nothing happens.
+     *
+     * @param   title
+     *          New title to display in this BossBar
+     */
+    void setTitle(@NonNull String title);
+
+    /**
+     * Changes BossBar progress to specified string, supporting placeholders.
+     * The string must be a string version of a float value, or a placeholder that
+     * outputs a float value with range 0-100.
+     * <p>
+     * If progress contains new placeholders not used before, they are registered using
+     * standard registration logic and refreshed periodically. No need to call
+     * this method to try to keep placeholder values up to date.
+     * <p>
+     * If specified progress is equal to the current one, nothing happens.
+     *
+     * @param   progress
+     *          New progress to use in this BossBar
+     */
+    void setProgress(@NonNull String progress);
+
+    /**
+     * Changes BossBar progress to specified value ranging from 0 to 100.
+     * <p>
+     * If specified progress is equal to the current one, nothing happens.
+     *
+     * @param   progress
+     *          New progress to use in this BossBar
+     */
+    void setProgress(float progress);
+
+    /**
+     * Changes BossBar color to specified string, supporting placeholders.
+     * The string must be a string version of one of the supported values,
+     * or a placeholder that outputs one of them.
+     * <p>
+     * If color contains new placeholders not used before, they are registered using
+     * standard registration logic and refreshed periodically. No need to call
+     * this method to try to keep placeholder values up to date.
+     * <p>
+     * If specified color is equal to the current one, nothing happens.
+     *
+     * @param   color
+     *          New color to use in this BossBar
+     */
+    void setColor(@NonNull String color);
+
+    /**
+     * Changes BossBar color to specified enum constant.
+     * <p>
+     * If specified color is equal to the current one, nothing happens.
+     *
+     * @param   color
+     *          New color to use in this BossBar
+     */
+    void setColor(@NonNull BarColor color);
+
+    /**
+     * Changes BossBar style to specified string, supporting placeholders.
+     * The string must be a string version of one of the supported values,
+     * or a placeholder that outputs one of them.
+     * <p>
+     * If style contains new placeholders not used before, they are registered using
+     * standard registration logic and refreshed periodically. No need to call
+     * this method to try to keep placeholder values up to date.
+     * <p>
+     * If specified style is equal to the current one, nothing happens.
+     *
+     * @param   style
+     *          New style to use in this BossBar
+     */
+    void setStyle(@NonNull String style);
+
+    /**
+     * Changes BossBar style to specified enum constant.
+     * <p>
+     * If specified style is equal to the current one, nothing happens.
+     *
+     * @param   style
+     *          New style to use in this BossBar
+     */
+    void setStyle(@NonNull BarStyle style);
+
+    /**
+     * Returns current title of the BossBar in raw format. If it contains placeholders,
+     * their raw identifiers are used in the result.
+     *
+     * @return  title of the BossBar
+     */
+    @NotNull String getTitle();
+
+    /**
+     * Returns progress of the BossBar as a string, which is either entered string
+     * containing placeholders or entered number converted to string
+     *
+     * @return  entered progress as a string
+     */
+    @NotNull String getProgress();
+
+    /**
+     * Returns color of the BossBar as a string, which is either entered string
+     * containing placeholders or entered enum value converted to string
+     *
+     * @return  entered color as a string
+     */
+    @NotNull String getColor();
+
+    /**
+     * Returns style of the BossBar as a string, which is either entered string
+     * containing placeholders or entered enum value converted to string
+     *
+     * @return  entered style as a string
+     */
+    @NotNull String getStyle();
+
+    /**
+     * Registers this BossBar to specified player.
+     * <p>
+     * If the player already sees this BossBar, nothing happens.
+     *
+     * @param   player
+     *          Player to register this BossBar to
+     */
+    void addPlayer(@NonNull TabPlayer player);
+
+    /**
+     * Unregisters this BossBar from specified player.
+     * <p>
+     * If the player does not see this BossBar, nothing happens.
+     *
+     * @param   player
+     *          Player to unregister this BossBar from
+     */
+    void removePlayer(@NonNull TabPlayer player);
+
+    /**
+     * Returns list of players who can see this BossBar.
+     * <p>
+     * The returned list can only be used to read. Writing
+     * will not work properly. For adding/removing players see {@link #addPlayer(TabPlayer)}
+     * and {@link #removePlayer(TabPlayer)}.
+     *
+     * @return  List of players seeing this BossBar
+     */
+    @NotNull List<TabPlayer> getPlayers();
+
+    /**
+     * Returns {@code true} if this bossbar is visible to specified player based on
+     * display condition or adding via {@link #addPlayer(TabPlayer)}, {@code false} if not.
+     * <p>
+     * This may return {@code true} even if player cannot physically see the bossbar due to
+     * having it disabled via toggle command or {@link BossBarManager#toggleBossBar(TabPlayer, boolean)}
+     * (or {@link BossBarManager#setBossBarVisible(TabPlayer, boolean, boolean)}).
+     *
+     * @param   player
+     *          Player to check
+     * @return  {@code true} if player is allowed to see this Boss Bar, {@code false} if not.
+     */
+    boolean containsPlayer(@NonNull TabPlayer player);
+
+    /**
+     * Returns {@code true} if this boss bar is configured as announcement-only bar,
+     * {@code false} if not.
+     *
+     * @return  {@code true} if bar is announcement only, {@code false} if not
+     */
+    boolean isAnnouncementBar();
+}

api/src/main/java/me/neznamy/tab/api/bossbar/BossBarManager.java

@@ -0,0 +1,179 @@
+package me.neznamy.tab.api.bossbar;
+
+import lombok.NonNull;
+import me.neznamy.tab.api.TabAPI;
+import me.neznamy.tab.api.TabPlayer;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.List;
+import java.util.Map;
+
+/**
+ * An interface allowing work with BossBars such as creating, sending
+ * and toggling.
+ * <p>
+ * Instance can be obtained using {@link TabAPI#getBossBarManager()}.
+ * This requires the BossBar feature to be enabled in config, otherwise the method will
+ * return {@code null}.
+ */
+@SuppressWarnings("unused") // API class
+public interface BossBarManager {
+
+    /**
+     * Creates BossBar with specified parameters and registers it to BossBar manager,
+     * allowing to retrieve it later.
+     * 
+     * @param   title
+     *          Title to display, supports placeholders
+     * @param   progress
+     *          Progress to use. Must be between 0 and 100
+     * @param   color
+     *          Color to use
+     * @param   style
+     *          Style to use
+     * @return  The newly created BossBar
+     */
+    @NotNull BossBar createBossBar(@NonNull String title, float progress, @NonNull BarColor color, @NonNull BarStyle style);
+
+    /**
+     * Creates BossBar with specified parameters and registers it to BossBar manager,
+     * allowing to retrieve it later.
+     * 
+     * @param   title
+     *          Title to display, supports placeholders
+     * @param   progress
+     *          Progress to use. Must be a string version of a number, or
+     *          a placeholder that returns a number
+     * @param   color
+     *          Color to use. Must be a string version of one of enum constants, or
+     *          a placeholder that returns one of them
+     * @param   style
+     *          Style to use. Must be a string version of one of enum constants, or
+     *          a placeholder that returns one of them
+     * @return  The newly created BossBar
+     */
+    @NotNull BossBar createBossBar(@NonNull String title, @NonNull String progress, @NonNull String color, @NonNull String style);
+
+    /**
+     * Returns registered BossBar with given name. For BossBars from config it is the name
+     * they were created with, for API BossBars their randomly generated name, which can be
+     * retrieved using {@link me.neznamy.tab.api.bossbar.BossBar#getName()}.
+     * Returns {@code null} if no such BossBar exists.
+     * 
+     * @param   name
+     *          Name of registered BossBar
+     * @return  BossBar with specified name
+     */
+    @Nullable BossBar getBossBar(@NonNull String name);
+
+    /**
+     * Returns a map of all registered BossBars. This includes both BossBars from config
+     * and those registered via API.
+     * <p>
+     * Map key is BossBar's name available in {@link me.neznamy.tab.api.bossbar.BossBar#getName()},
+     * map value is the BossBar interface.
+     *
+     * @return  all registered BossBars
+     */
+    @NotNull Map<String, BossBar> getRegisteredBossBars();
+
+    /**
+     * Removes BossBar with specified name from the manager, making it no longer available.
+     * If BossBar was displayed to any players, it is removed.
+     *
+     * @param   name
+     *          Name of registered BossBar to remove
+     * @throws  IllegalArgumentException
+     *          if no BossBar with specified name exists
+     */
+    void removeBossBar(@NonNull String name);
+
+    /**
+     * Removes BossBar from the manager, making it no longer available.
+     * If BossBar was displayed to any players, it is removed.
+     *
+     * @param   bossBar
+     *          BossBar to remove
+     * @throws  IllegalArgumentException
+     *          if specified BossBar is not registered
+     */
+    void removeBossBar(@NonNull BossBar bossBar);
+
+    /**
+     * Toggles BossBar for this player and sends toggle message if {@code sendToggleMessage} is true.
+     * 
+     * @param   player
+     *          Player to toggle BossBar for
+     * @param   sendToggleMessage
+     *          {@code true} if toggle message should be sent, {@code false} if not
+     * @see     #hasBossBarVisible(TabPlayer)
+     * @see     #setBossBarVisible(TabPlayer, boolean, boolean)
+     */
+    void toggleBossBar(@NonNull TabPlayer player, boolean sendToggleMessage);
+
+    /**
+     * Returns true if player can see BossBars, false if toggled via command or API.
+     * 
+     * @param   player
+     *          Player to check toggle status of
+     * @return  {@code true} if visible, {@code false} if disabled (toggled)
+     * @see     #toggleBossBar(TabPlayer, boolean)
+     * @see     #setBossBarVisible(TabPlayer, boolean, boolean)
+     */
+    boolean hasBossBarVisible(@NonNull TabPlayer player);
+
+    /**
+     * Sets BossBar visibility of player to set value. If value did not change, nothing happens.
+     * If visibility changed, toggle message is sent if {@code sendToggleMessage} is {@code true}.
+     * 
+     * @param   player
+     *          Player to set BossBar visibility of
+     * @param   visible
+     *          {@code true} if BossBar should be visible, {@code false} if not
+     * @param   sendToggleMessage
+     *          {@code true} if toggle message should be sent if value changed, {@code false} if not
+     * @see #toggleBossBar(TabPlayer, boolean)
+     * @see #hasBossBarVisible(TabPlayer)
+     */
+    void setBossBarVisible(@NonNull TabPlayer player, boolean visible, boolean sendToggleMessage);
+
+    /**
+     * Temporarily displays registered BossBar to player for specified amount of time in seconds.
+     *
+     * @param   player
+     *          Player to show BossBar to
+     * @param   bossBar
+     *          Name of registered BossBar to show
+     * @param   duration
+     *          In seconds for how long should BossBar be displayed
+     * @throws  IllegalArgumentException
+     *          if no BossBar with specified name exists
+     * @see     #announceBossBar(String, int)
+     * @see     #getAnnouncedBossBars()
+     */
+    void sendBossBarTemporarily(@NonNull TabPlayer player, @NonNull String bossBar, int duration);
+
+    /**
+     * Temporarily displays registered BossBar to all players for specified amount of time in seconds.
+     *
+     * @param   bossBar
+     *          Name of registered BossBar to show
+     * @param   duration
+     *          In seconds for how long should BossBar be displayed
+     * @throws  IllegalArgumentException
+     *          if no BossBar with specified name exists
+     * @see     #sendBossBarTemporarily(TabPlayer, String, int)
+     * @see     #getAnnouncedBossBars()
+     */
+    void announceBossBar(@NonNull String bossBar, int duration);
+
+    /**
+     * Returns list of BossBars which are currently being announced.
+     *
+     * @return  list of currently active BossBar announcements
+     * @see     #sendBossBarTemporarily(TabPlayer, String, int)
+     * @see     #announceBossBar(String, int)
+     */
+    @NotNull List<BossBar> getAnnouncedBossBars();
+}

api/src/main/java/me/neznamy/tab/api/event/EventBus.java

@@ -0,0 +1,56 @@
+package me.neznamy.tab.api.event;
+
+import lombok.NonNull;
+
+/**
+ * The event bus. This is used to register event listeners/handlers for
+ * handling events that may be fired by TAB.
+ */
+@SuppressWarnings("unused") // API class
+public interface EventBus {
+
+    /**
+     * Scans the given listener for any method that is annotated with
+     * {@link Subscribe} and registers it as a listener to this event bus.
+     *
+     * <p>All methods in this class that are annotated with {@link Subscribe}
+     * must meet the following criteria:
+     * <ul>
+     *     <li>It must be <strong>public</strong>.</li>
+     *     <li>It must <strong>not</strong> be abstract.</li>
+     *     <li>It must have exactly <strong>one</strong> parameter.</li>
+     *     <li>Its single parameter must be <strong>an event</strong>.</li>
+     * </ul>
+     * If a method does not meet the above criteria, an exception <strong>will</strong>
+     * be thrown.
+     *
+     * @param listener the listener to register
+     * @throws RuntimeException if a method does not meet the criteria
+     */
+    void register(@NonNull Object listener);
+
+    /**
+     * Registers the given handler to this event bus.
+     *
+     * @param type the class type of the event
+     * @param handler the handler to register
+     * @param <E> the type of the event
+     */
+    <E extends TabEvent> void register(@NonNull Class<E> type, @NonNull EventHandler<E> handler);
+
+    /**
+     * Scans the given listener for any method that is annotated with
+     * {@link Subscribe} and unregisters it from this event bus.
+     *
+     * @param listener the listener to unregister
+     */
+    void unregister(@NonNull Object listener);
+
+    /**
+     * Unregisters the given handler from this event bus.
+     *
+     * @param handler the handler to unregister
+     * @param <E> the type of the event
+     */
+    <E extends TabEvent> void unregister(@NonNull EventHandler<E> handler);
+}

api/src/main/java/me/neznamy/tab/api/event/EventHandler.java

@@ -0,0 +1,18 @@
+package me.neznamy.tab.api.event;
+
+/**
+ * A handler for an event. This allows listening for events in a more
+ * functional style.
+ *
+ * @param <E> the type of event this handler handles
+ */
+@FunctionalInterface
+public interface EventHandler<E> {
+
+    /**
+     * Called when the given event is fired from an event bus.
+     *
+     * @param event the event to handle
+     */
+    void handle(E event);
+}

api/src/main/java/me/neznamy/tab/api/event/Subscribe.java

@@ -0,0 +1,14 @@
+package me.neznamy.tab.api.event;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Subscribes to a {@link TabEvent}.
+ */
+@Target(ElementType.METHOD)
+@Retention(RetentionPolicy.RUNTIME)
+public @interface Subscribe {
+}

api/src/main/java/me/neznamy/tab/api/event/TabEvent.java

@@ -0,0 +1,10 @@
+package me.neznamy.tab.api.event;
+
+/**
+ * An event that may be fired by TAB when something occurs.
+ *
+ * <p>This is a marker interface. All events <strong>must</strong> implement this
+ * interface.
+ */
+public interface TabEvent {
+}

api/src/main/java/me/neznamy/tab/api/event/player/PlayerLoadEvent.java

@@ -0,0 +1,26 @@
+package me.neznamy.tab.api.event.player;
+
+import me.neznamy.tab.api.TabPlayer;
+import me.neznamy.tab.api.event.TabEvent;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Called when the player has been fully loaded by TAB.
+ */
+public interface PlayerLoadEvent extends TabEvent {
+
+    /**
+     * Gets the player that was loaded.
+     *
+     * @return  the player that was loaded
+     */
+    @NotNull TabPlayer getPlayer();
+
+    /**
+     * Returns {@code true} if player was loaded because they joined,
+     * {@code false} if the player was loaded because tab reload command was executed
+     *
+     * @return  {@code true} if player joined, {@code false} if plugin was reloaded
+     */
+    boolean isJoin();
+}

api/src/main/java/me/neznamy/tab/api/event/plugin/TabLoadEvent.java

@@ -0,0 +1,9 @@
+package me.neznamy.tab.api.event.plugin;
+
+import me.neznamy.tab.api.event.TabEvent;
+
+/**
+ * Called when TAB is fully loaded.
+ */
+public interface TabLoadEvent extends TabEvent {
+}

api/src/main/java/me/neznamy/tab/api/integration/VanishIntegration.java

@@ -0,0 +1,85 @@
+package me.neznamy.tab.api.integration;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+import me.neznamy.tab.api.TabPlayer;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@Getter
+@RequiredArgsConstructor
+public abstract class VanishIntegration {
+
+    /** List of all registered VanishIntegration handlers */
+    private static final List<VanishIntegration> HANDLERS = new ArrayList<>();
+
+    /** Name of the plugin this integration is associated with */
+    @NotNull
+    private final String plugin;
+
+    /**
+     * Determines if a viewer can see a target player.
+     *
+     * @param   viewer
+     *          The player attempting to view another player
+     * @param   target
+     *          The player being viewed
+     * @return  {@code true} if the viewer can see the target, {@code false} otherwise
+     */
+    public abstract boolean canSee(@NotNull TabPlayer viewer, @NotNull TabPlayer target);
+
+    /**
+     * Checks if the specified player is in a vanished state.
+     *
+     * @param   player
+     *          The player to check
+     * @return  {@code true} if the player is vanished, {@code false} otherwise
+     */
+    public abstract boolean isVanished(@NotNull TabPlayer player);
+
+    /**
+     * Registers this integration handler to the global list of handlers.
+     */
+    public void register() {
+        registerHandler(this);
+    }
+
+    /**
+     * Unregisters this integration handler from the global list of handlers.
+     */
+    public void unregister() {
+        unregisterHandler(this);
+    }
+
+    /**
+     * Adds a VanishIntegration handler to the global list of handlers.
+     *
+     * @param handler
+     *        The handler to register
+     */
+    public static void registerHandler(@NotNull VanishIntegration handler) {
+        HANDLERS.add(handler);
+    }
+
+    /**
+     * Removes a VanishIntegration handler from the global list of handlers.
+     *
+     * @param handler
+     *        The handler to unregister
+     */
+    public static void unregisterHandler(@NotNull VanishIntegration handler) {
+        HANDLERS.remove(handler);
+    }
+
+    /**
+     * Retrieves the list of all registered VanishIntegration handlers.
+     *
+     * @return  A list of registered VanishIntegration handlers
+     */
+    @NotNull
+    public static List<VanishIntegration> getHandlers() {
+        return HANDLERS;
+    }
+}

api/src/main/java/me/neznamy/tab/api/nametag/NameTagManager.java

@@ -0,0 +1,289 @@
+package me.neznamy.tab.api.nametag;
+
+import lombok.NonNull;
+import me.neznamy.tab.api.TabAPI;
+import me.neznamy.tab.api.TabPlayer;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * Interface for manipulating player name tags.
+ * <p>
+ * Instance can be obtained using {@link TabAPI#getNameTagManager()}.
+ * This requires the Team feature to be enabled in config, otherwise the method will
+ * return {@code null}.
+ */
+@SuppressWarnings("unused") // API class
+public interface NameTagManager {
+
+    /**
+     * Makes player's NameTag globally invisible
+     *
+     * @param   player
+     *          player to hide name tag of
+     * @see     #showNameTag(TabPlayer)
+     * @see     #hasHiddenNameTag(TabPlayer)
+     */
+    void hideNameTag(@NonNull TabPlayer player);
+
+    /**
+     * Hides player's NameTag for specified player until it's shown again
+     *
+     * @param   player
+     *          player to hide name tag of
+     * @param   viewer
+     *          player to hide name tag for
+     */
+    void hideNameTag(@NonNull TabPlayer player, @NonNull TabPlayer viewer);
+
+    /**
+     * Makes player's NameTag visible again
+     *
+     * @param   player
+     *          player to show name tag of
+     * @see     #hideNameTag(TabPlayer)
+     * @see     #hasHiddenNameTag(TabPlayer)
+     */
+    void showNameTag(@NonNull TabPlayer player);
+
+    /**
+     * Shows player's NameTag for specified viewer if it was hidden before
+     *
+     * @param   player
+     *          player to show name tag of
+     * @param   viewer
+     *          player to show NameTag back for
+     */
+    void showNameTag(@NonNull TabPlayer player, @NonNull TabPlayer viewer);
+
+    /**
+     * Return whether player has hidden NameTag or not
+     *
+     * @param   player
+     *          player to check name tag visibility status of
+     * @return  Whether player has hidden NameTag or not
+     * @see     #hideNameTag(TabPlayer)
+     * @see     #showNameTag(TabPlayer)
+     */
+    boolean hasHiddenNameTag(@NonNull TabPlayer player);
+
+    /**
+     * Returns true if NameTag is hidden for specified viewer, false if not
+     *
+     * @param   player
+     *          player to check visibility status of
+     * @param   viewer
+     *          player to check visibility status for
+     * @return  true if hidden, false if not
+     */
+    boolean hasHiddenNameTag(@NonNull TabPlayer player, @NonNull TabPlayer viewer);
+
+    /**
+     * Unregisters player's team and no longer handles it, as well as disables anti-override for teams.
+     * This can be resumed using resumeTeamHandling(). If team handling was paused already, nothing happens.
+     *
+     * @param   player
+     *          player to pause team handling of
+     */
+    void pauseTeamHandling(@NonNull TabPlayer player);
+
+    /**
+     * Resumes team handling if it was before paused using pauseTeamHandling(), if not, nothing happens
+     *
+     * @param   player
+     *          player to resume team handling of
+     */
+    void resumeTeamHandling(@NonNull TabPlayer player);
+
+    /**
+     * Returns true if team handling is paused for this player using pauseTeamHandling(), false if not, or
+     * it was resumed already using resumeTeamHandling
+     *
+     * @param   player
+     *          player to check handling status of
+     * @return  true if paused, false if not
+     */
+    boolean hasTeamHandlingPaused(@NonNull TabPlayer player);
+
+    /**
+     * Forces collision rule for the player. Setting it to null will remove forced value
+     *
+     * @param   player
+     *          player to set collision rule of
+     * @param   collision
+     *          forced collision rule
+     */
+    void setCollisionRule(@NonNull TabPlayer player, @Nullable Boolean collision);
+
+    /**
+     * Returns forced collision rule or null if collision is not forced using setCollisionRule
+     *
+     * @param   player
+     *          player to get forced collision of
+     * @return  forced value or null if not forced
+     */
+    @Nullable Boolean getCollisionRule(@NonNull TabPlayer player);
+
+    /**
+     * Changes player's prefix to provided value. Supports placeholders,
+     * as well as any supported RGB formats. Use {@code null} to reset
+     * value back to original.
+     *
+     * @param   player
+     *          player to change prefix of
+     * @param   prefix
+     *          new prefix value
+     * @see     #getCustomPrefix(TabPlayer)
+     * @see     #getOriginalRawPrefix(TabPlayer)
+     */
+    void setPrefix(@NonNull TabPlayer player, @Nullable String prefix);
+
+    /**
+     * Changes player's suffix to provided value. Supports placeholders,
+     * as well as any supported RGB formats. Use {@code null} to reset
+     * value back to original.
+     *
+     * @param   player
+     *          player to change prefix of
+     * @param   suffix
+     *          new suffix value
+     * @see     #getCustomSuffix(TabPlayer)
+     * @see     #getOriginalRawSuffix(TabPlayer)
+     */
+    void setSuffix(@NonNull TabPlayer player, @Nullable String suffix);
+
+    /**
+     * Returns custom prefix assigned using {@link #setPrefix(TabPlayer, String)}.
+     * If no custom prefix is set, returns {@code null}.
+     *
+     * @param   player
+     *          Player to get custom prefix of
+     * @return  Custom prefix assigned using the API.
+     * @see     #setPrefix(TabPlayer, String)
+     * @see     #getOriginalRawPrefix(TabPlayer)
+     */
+    @Nullable
+    String getCustomPrefix(@NonNull TabPlayer player);
+
+    /**
+     * Returns custom suffix assigned using {@link #setSuffix(TabPlayer, String)}.
+     * If no custom suffix is set, returns {@code null}.
+     *
+     * @param   player
+     *          Player to get custom suffix of
+     * @return  Custom suffix assigned using the API.
+     * @see     #setSuffix(TabPlayer, String)
+     * @see     #getOriginalRawSuffix(TabPlayer)
+     */
+    @Nullable
+    String getCustomSuffix(@NonNull TabPlayer player);
+
+    /**
+     * Returns original prefix assigned by the plugin using internal logic.
+     * @param   player
+     *          Player to get original prefix of
+     * @return  Original prefix assigned by the plugin's internal logic.
+     * @see     #getCustomPrefix(TabPlayer)
+     */
+    @NotNull
+    String getOriginalRawPrefix(@NonNull TabPlayer player);
+
+    /**
+     * Returns original suffix assigned by the plugin using internal logic.
+     * @param   player
+     *          Player to get original suffix of
+     * @return  Original suffix assigned by the plugin's internal logic.
+     * @see     #getCustomSuffix(TabPlayer)
+     */
+    @NotNull
+    String getOriginalRawSuffix(@NonNull TabPlayer player);
+
+    /**
+     * Returns original prefix assigned by the plugin using internal logic with all placeholders replaced.
+     * @param   player
+     *          Player to get replaced original prefix of
+     * @return  Original prefix assigned by the plugin's internal logic.
+     * @see     #getCustomPrefix(TabPlayer)
+     */
+    @NotNull
+    String getOriginalReplacedPrefix(@NonNull TabPlayer player);
+
+    /**
+     * Returns original suffix assigned by the plugin using internal logic with all placeholders replaced.
+     * @param   player
+     *          Player to get replaced original suffix of
+     * @return  Original suffix assigned by the plugin's internal logic.
+     * @see     #getCustomSuffix(TabPlayer)
+     */
+    @NotNull
+    String getOriginalReplacedSuffix(@NonNull TabPlayer player);
+
+    /**
+     * Returns original suffix assigned by the plugin using internal logic.
+     * @param   player
+     *          Player to get replaced original prefix of
+     * @return  Original prefix assigned by the plugin's internal logic.
+     * @see     #getCustomPrefix(TabPlayer)
+     * @deprecated  Use {@link #getOriginalRawPrefix(TabPlayer)} instead.
+     */
+    @Deprecated
+    @NotNull
+    String getOriginalPrefix(@NonNull TabPlayer player);
+
+    /**
+     * Returns original suffix assigned by the plugin using internal logic.
+     * @param   player
+     *          Player to get replaced original suffix of
+     * @return  Original suffix assigned by the plugin's internal logic.
+     * @see     #getCustomSuffix(TabPlayer)
+     * @deprecated  Use {@link #getOriginalRawSuffix(TabPlayer)} instead.
+     */
+    @Deprecated
+    @NotNull
+    String getOriginalSuffix(@NonNull TabPlayer player);
+
+    /**
+     * Toggles name tag visibility view on all players for specified player.
+     * On first call, name tags of all players will become invisible for specified
+     * player. On the second call, they will become visible again.
+     *
+     * @param   player
+     *          player to toggle name tag visibility view for
+     * @param   sendToggleMessage
+     *          {@code true} if the configured toggle message should be sent, {@code false} if not
+     */
+    void toggleNameTagVisibilityView(@NonNull TabPlayer player, boolean sendToggleMessage);
+
+    /**
+     * Shows back name tag visibility view on all players for specified player.
+     * If the view is not hidden, nothing happens.
+     *
+     * @param   player
+     *          player to show name tag visibility view for
+     * @param   sendToggleMessage
+     *          {@code true} if the configured toggle message should be sent, {@code false} if not
+     */
+    void showNameTagVisibilityView(@NonNull TabPlayer player, boolean sendToggleMessage);
+
+    /**
+     * Hides name tag visibility view on all players for specified player.
+     * If the view is already hidden, nothing happens.
+     *
+     * @param   player
+     *          player to show name tag visibility view for
+     * @param   sendToggleMessage
+     *          {@code true} if the configured toggle message should be sent, {@code false} if not
+     */
+    void hideNameTagVisibilityView(@NonNull TabPlayer player, boolean sendToggleMessage);
+
+    /**
+     * Returns {@code true} if player has hidden name tags by either calling
+     * {@link #toggleNameTagVisibilityView(TabPlayer, boolean)} or using a command,
+     * {@code false} if not.
+     *
+     * @param   player
+     *          player to check
+     * @return  {@code true} if hidden, {@code false} if not
+     */
+    boolean hasHiddenNameTagVisibilityView(@NonNull TabPlayer player);
+}

api/src/main/java/me/neznamy/tab/api/placeholder/Placeholder.java

@@ -0,0 +1,23 @@
+package me.neznamy.tab.api.placeholder;
+
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * An interface representing some kind of placeholder
+ */
+public interface Placeholder {
+
+    /**
+     * Returns refresh interval of this placeholder
+     *
+     * @return  refresh interval of this placeholder
+     */
+    int getRefresh();
+
+    /**
+     * Returns placeholder's identifier
+     *
+     * @return  placeholder's identifier
+     */
+    @NotNull String getIdentifier();
+}

api/src/main/java/me/neznamy/tab/api/placeholder/PlaceholderManager.java

@@ -0,0 +1,103 @@
+package me.neznamy.tab.api.placeholder;
+
+import lombok.NonNull;
+import me.neznamy.tab.api.TabAPI;
+import me.neznamy.tab.api.TabPlayer;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.function.BiFunction;
+import java.util.function.Function;
+import java.util.function.Supplier;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * An interface allowing placeholder registration. Instance can be
+ * obtained using {@link TabAPI#getPlaceholderManager()}
+ */
+@SuppressWarnings("unused") // API class
+public interface PlaceholderManager {
+
+    /**
+     * Registers a server placeholder (placeholder with same output for all players)
+     *
+     * @param   identifier
+     *          Placeholder identifier
+     * @param   refresh
+     *          Refresh interval
+     * @param   supplier
+     *          Supplier for placeholder output
+     * @return  Registered placeholder for further use
+     * @throws  IllegalArgumentException
+     *          If {@code identifier} does not start and end with {@code %} or
+     *          {@code refresh} is not divisible by 50
+     */
+    @NotNull ServerPlaceholder registerServerPlaceholder(@NonNull String identifier, int refresh, @NonNull Supplier<String> supplier);
+
+    /**
+     * Registers a player placeholder (placeholder different output per player)
+     *
+     * @param   identifier
+     *          Placeholder identifier
+     * @param   refresh
+     *          Refresh interval
+     * @param   function
+     *          Function for placeholder output
+     * @return  Registered placeholder for further use
+     * @throws  IllegalArgumentException
+     *          If {@code identifier} does not start and end with {@code %} or
+     *          {@code refresh} is not divisible by 50
+     */
+    @NotNull PlayerPlaceholder registerPlayerPlaceholder(@NonNull String identifier, int refresh, @NonNull Function<TabPlayer, String> function);
+
+    /**
+     * Registers a relational placeholder (placeholder with output different for each player duo)
+     *
+     * @param   identifier
+     *          Placeholder identifier
+     * @param   refresh
+     *          Refresh interval
+     * @param   function
+     *          Function for placeholder output
+     * @return  Registered placeholder for further use
+     * @throws  IllegalArgumentException
+     *          If {@code identifier} does not start and end with {@code %},
+     *          does not start with {@code %rel_} or
+     *          {@code refresh} is not divisible by 50
+     */
+    @NotNull RelationalPlaceholder registerRelationalPlaceholder(@NonNull String identifier, int refresh, @NonNull BiFunction<TabPlayer, TabPlayer, String> function);
+
+    void registerServerPlaceholder(@NonNull Pattern identifier, int refresh, @NonNull Function<Matcher, Supplier<String>> function);
+
+    void registerPlayerPlaceholder(@NonNull Pattern identifier, int refresh,
+                                   @NonNull Function<Matcher, Function<me.neznamy.tab.api.TabPlayer, String>> function);
+
+    void registerRelationalPlaceholder(@NonNull Pattern identifier, int refresh,
+                                       @NonNull Function<Matcher, BiFunction<me.neznamy.tab.api.TabPlayer, me.neznamy.tab.api.TabPlayer, String>> function);
+
+    /**
+     * Returns placeholder from specified identifier. If it does not exist, it is registered
+     * as a PlaceholderAPI placeholder and returned.
+     *
+     * @param   identifier
+     *          Placeholder identifier
+     * @return  Placeholder with specified identifier
+     */
+    @NotNull Placeholder getPlaceholder(@NonNull String identifier);
+
+    /**
+     * Unregisters placeholder and makes plugin no longer refresh it.
+     *
+     * @param   placeholder
+     *          Placeholder to unregister
+     */
+    void unregisterPlaceholder(@NonNull Placeholder placeholder);
+
+    /**
+     * Unregisters placeholder and makes plugin no longer refresh it.
+     *
+     * @param   identifier
+     *          identifier of placeholder to unregister
+     */
+    void unregisterPlaceholder(@NonNull String identifier);
+}

api/src/main/java/me/neznamy/tab/api/placeholder/PlayerPlaceholder.java

@@ -0,0 +1,31 @@
+package me.neznamy.tab.api.placeholder;
+
+import lombok.NonNull;
+import me.neznamy.tab.api.TabPlayer;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * Interface for player placeholders (placeholders returning different value for each player)
+ */
+public interface PlayerPlaceholder extends Placeholder {
+
+    /**
+     * Force-updates placeholder value. It will still be overridden by periodic refresh later,
+     * so this is (only) useful for force an update when value is supposed to change, and you have
+     * a high refresh interval set.
+     *
+     * @param   player
+     *          Player to update value for
+     * @param   value
+     *          New value
+     */
+    void updateValue(@NonNull TabPlayer player, @Nullable String value);
+
+    /**
+     * Force-updates placeholder value using previously provided update function.
+     *
+     * @param   player
+     *          Player to update value for
+     */
+    void update(@NonNull TabPlayer player);
+}

api/src/main/java/me/neznamy/tab/api/placeholder/RelationalPlaceholder.java

@@ -0,0 +1,36 @@
+package me.neznamy.tab.api.placeholder;
+
+import lombok.NonNull;
+import me.neznamy.tab.api.TabPlayer;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * An interface for relational placeholders (returning different value for each player duo)
+ */
+@SuppressWarnings("unused") // API class
+public interface RelationalPlaceholder extends Placeholder {
+
+    /**
+     * Force-updates placeholder value. It will still be overridden by periodic refresh later,
+     * so this is (only) useful for force an update when value is supposed to change, and you have
+     * a high refresh interval set.
+     *
+     * @param   viewer
+     *          Placeholder viewer
+     * @param   target
+     *          Placeholder target
+     * @param   value
+     *          New value
+     */
+    void updateValue(@NonNull TabPlayer viewer, @NonNull TabPlayer target, @Nullable String value);
+
+    /**
+     * Force-updates placeholder value using previously provided update function.
+     *
+     * @param   viewer
+     *          Placeholder viewer
+     * @param   target
+     *          Placeholder target
+     */
+    void update(@NonNull TabPlayer viewer, @NonNull TabPlayer target);
+}

api/src/main/java/me/neznamy/tab/api/placeholder/ServerPlaceholder.java

@@ -0,0 +1,24 @@
+package me.neznamy.tab.api.placeholder;
+
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * An interface for server placeholders (returning same value for all players)
+ */
+public interface ServerPlaceholder extends Placeholder {
+
+    /**
+     * Force-updates placeholder value. It will still be overridden by periodic refresh later,
+     * so this is (only) useful for force an update when value is supposed to change, and you have
+     * a high refresh interval set.
+     *
+     * @param   value
+     *          New value
+     */
+    void updateValue(@Nullable String value);
+
+    /**
+     * Force-updates placeholder value using previously provided update function.
+     */
+    void update();
+}

api/src/main/java/me/neznamy/tab/api/scoreboard/Line.java

@@ -0,0 +1,32 @@
+package me.neznamy.tab.api.scoreboard;
+
+import lombok.NonNull;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * An interface allowing to work with a line of
+ * text in scoreboard.
+ *
+ */
+public interface Line {
+
+    /**
+     * Returns configured raw text of this line. Placeholders
+     * remain in raw format.
+     * 
+     * @return  raw text of this line
+     */
+    @NotNull String getText();
+    
+    /**
+     * Changes text to new value. Supports placeholders, which are
+     * automatically registered if needed and refreshed periodically
+     * based on configuration. No need to call this method to try to
+     * keep placeholders up to date. If value is identical to previous 
+     * one, nothing happens.
+     * 
+     * @param   text
+     *          Raw text to display in the line
+     */
+    void setText(@NonNull String text);
+}

api/src/main/java/me/neznamy/tab/api/scoreboard/Scoreboard.java

@@ -0,0 +1,107 @@
+package me.neznamy.tab.api.scoreboard;
+
+import lombok.NonNull;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.List;
+
+/**
+ * An interface allowing to work with scoreboard, such as adding players,
+ * removing players and changing lines. New instance can be created using
+ * {@link ScoreboardManager#createScoreboard(String, String, List)},
+ * for scoreboards from config {@link ScoreboardManager#getRegisteredScoreboards()}.
+ */
+@SuppressWarnings("unused") // API class
+public interface Scoreboard {
+
+    /**
+     * Returns internal name of this scoreboard. Name is defined in registration,
+     * scoreboards from config use name they were defined with. This value is
+     * used internally and in /tab scoreboard announce command.
+     * 
+     * @return  custom name of this scoreboard
+     */
+    @NotNull String getName();
+
+    /**
+     * Returns raw title of this scoreboard. Placeholders stay in their
+     * raw format.
+     * 
+     * @return  scoreboard title
+     * @see     #setTitle(String)
+     */
+    @NotNull String getTitle();
+
+    /**
+     * Sets title to specified value. Placeholders are refreshed automatically
+     * with refresh intervals defined in config. No need to call this method
+     * to try to keep placeholders up to date. Supports RGB codes using any of 
+     * the supported formats.
+     * <p>
+     * Length is limited to 32 characters on &lt;1.13. If the limit is exceeded,
+     * text will be cut to 32 characters.
+     * <p>
+     * Calling this method with same title as before will not do anything.
+     * 
+     * @param   title
+     *          New title to use with placeholder support
+     * @see     #getTitle()
+     */
+    void setTitle(@NonNull String title);
+
+    /**
+     * Returns list of lines in this scoreboard in the order they appear
+     * in game (first line is on top). This list should only be used for reading,
+     * for adding/removing lines see {@link #addLine(String)} and {@link #removeLine(int)}.
+     * 
+     * @return  list of lines in this scoreboard
+     * @see     #addLine(String)
+     * @see     #removeLine(int)
+     */
+    @NotNull List<Line> getLines();
+
+    /**
+     * Adds line with specified text on the bottom of scoreboard. Supports
+     * placeholders, which will automatically be refreshed.
+     * 
+     * @param   text
+     *          Text to display
+     * @see     #getLines()
+     * @see     #removeLine(int)
+     */
+    void addLine(@NonNull String text);
+
+    /**
+     * Removes line with specified index. Index starts at {@code 0} and ends at 
+     * {@link #getLines()}.size()-1.
+     * 
+     * @param   index
+     *          Index of line to remove, starting at 0
+     * @throws  IndexOutOfBoundsException
+     *          if the index is out of range (index &lt; 0 || index &gt;= {@link #getLines()}.size())
+     * @see     #getLines()
+     * @see     #addLine(String)
+     */
+    void removeLine(int index);
+
+    /**
+     * Replaces all current lines with the provided list.
+     * Supports placeholders, which will automatically be refreshed.
+     * Client can only see up to 15 lines at a time.
+     * If the new list is identical to the current one, nothing happens.
+     *
+     * @param   lines
+     *          New list of lines to display
+     * @throws  NullPointerException
+     *          if {@code lines} is {@code null}
+     * @see     #getLines()
+     * @see     #addLine(String)
+     * @see     #removeLine(int)
+     */
+    void setLines(@NonNull List<String> lines);
+
+    /**
+     * Unregisters this scoreboard from all players who can see it.
+     */
+    void unregister();
+}

api/src/main/java/me/neznamy/tab/api/scoreboard/ScoreboardManager.java

@@ -0,0 +1,193 @@
+package me.neznamy.tab.api.scoreboard;
+
+import lombok.NonNull;
+import me.neznamy.tab.api.TabPlayer;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Interface allowing work with scoreboards, such as creating,
+ * sending, toggling and modifying.
+ * <p>
+ * Instance can be obtained using {@link me.neznamy.tab.api.TabAPI#getScoreboardManager()}.
+ * This requires the scoreboard feature to be enabled in config,
+ * the method will return {@code null} otherwise.
+ */
+@SuppressWarnings("unused") // API class
+public interface ScoreboardManager {
+
+    /**
+     * Creates new scoreboard, registers and returns it. {@code name}
+     * is internal name of the scoreboard, which it will be registered
+     * with and further work where scoreboard name is used allowed.
+     * <p>
+     * Scoreboard {@code title} is limited to 32 characters on &lt;1.13. If needed,
+     * it will be cut to 32 character for those players (after replacing 
+     * placeholders). RGB is supported using any of the supported formats.
+     * Placeholders are supported.
+     * <p>
+     * {@code lines} will display in the same order as contained in the list.
+     * Client can only see up to 15 lines at a time, however you can define
+     * more, if some of them only consist of placeholder that might be empty.
+     * 
+     * @param   name
+     *          Internal name of the scoreboard
+     * @param   title
+     *          The scoreboard title
+     * @param   lines
+     *          Lines of text in scoreboard (supports placeholders)
+     * @return  The new scoreboard with given parameters
+     * @throws  NullPointerException
+     *          if {@code name} or {@code lines} is {@code null}
+     */
+    @NotNull Scoreboard createScoreboard(@NonNull String name, @NonNull String title, @NonNull List<String> lines);
+    
+    /**
+     * Returns map of registered scoreboards via config and API.
+     * Map key is name of scoreboard, which is defined either in config
+     * or using {@link #createScoreboard(String, String, List)}.
+     * Map value is reference to the actual scoreboard.
+     * 
+     * @return  map of registered scoreboards
+     */
+    @NotNull Map<String, Scoreboard> getRegisteredScoreboards();
+
+    /**
+     * Removes scoreboard with specified name from list of scoreboards. If it was displayed to anyone,
+     * it will be removed from their display as well. Then, those players will receive a new scoreboard based
+     * on configuration.
+     *
+     * @param   name    Name of scoreboard to remove
+     * @throws  IllegalArgumentException
+     *          if scoreboard with such name does not exist
+     */
+    void removeScoreboard(@NonNull String name);
+
+    /**
+     * Removes scoreboard from list of scoreboards. If it was displayed to anyone,
+     * it will be removed from their display as well. Then, those players will receive a new scoreboard based
+     * on configuration.
+     *
+     * @param   scoreboard
+     *          Scoreboard to remove
+     * @throws  IllegalArgumentException
+     *          if specified scoreboard is not registered
+     */
+    void removeScoreboard(@NonNull Scoreboard scoreboard);
+    
+    /**
+     * Displays scoreboard to defined player. This will disable all display
+     * condition checks until the scoreboard is unregistered using 
+     * {@link #resetScoreboard(TabPlayer)}. If the player already sees
+     * this scoreboard, nothing will happen.
+     * 
+     * @param   player
+     *          Player to send scoreboard to
+     * @param   scoreboard
+     *          Scoreboard to display
+     * @throws  NullPointerException
+     *          if {@code player} or {@code scoreboard} is {@code null}
+     * @see     #hasCustomScoreboard(TabPlayer)
+     * @see     #resetScoreboard(TabPlayer)
+     */
+    void showScoreboard(@NonNull TabPlayer player, @NonNull Scoreboard scoreboard);
+    
+    /**
+     * Returns {@code true} if player has custom scoreboard set using
+     * {@link #showScoreboard(TabPlayer, Scoreboard)}, {@code false} if not.
+     * 
+     * @param   player
+     *          Player to check
+     * @return  {@code true} if player has custom scoreboard set using API,
+     *          {@code false} if not
+     * @see      #showScoreboard(TabPlayer, Scoreboard)
+     * @see     #resetScoreboard(TabPlayer)
+     */
+    boolean hasCustomScoreboard(@NonNull TabPlayer player);
+    
+    /**
+     * Hides custom scoreboard sent using {@link #showScoreboard(TabPlayer, Scoreboard)}
+     * and re-enables internal display logic with conditions. If player does not
+     * have any forced scoreboard, nothing happens.
+     * 
+     * @param   player
+     *          Player to hide custom scoreboard from
+     * @see     #showScoreboard(TabPlayer, Scoreboard)
+     * @see     #hasCustomScoreboard(TabPlayer)
+     */
+    void resetScoreboard(@NonNull TabPlayer player);
+    
+    /**
+     * Returns {@code true} if player has scoreboard enabled, {@code false} 
+     * if disabled (toggled) using either toggle command, 
+     * {@link #toggleScoreboard(TabPlayer, boolean)} or
+     * {@link #setScoreboardVisible(TabPlayer, boolean, boolean)}.
+     * 
+     * @param   player
+     *          Player to get visibility status of
+     * @return  {@code true} if visible, {@code false} if disabled
+     * @see     #setScoreboardVisible(TabPlayer, boolean, boolean)
+     * @see     #toggleScoreboard(TabPlayer, boolean)
+     */
+    boolean hasScoreboardVisible(@NonNull TabPlayer player);
+    
+    /**
+     * Sets scoreboard visibility of player to defined value. If visibility status
+     * is same as player had before, nothing happens. If this call changes
+     * visibility, scoreboard is toggled. If {@code sendToggleMessage} is {@code true},
+     * toggle message defined in configuration is sent.
+     * 
+     * @param   player
+     *          Player to set visibility for
+     * @param   visible
+     *          New visibility status
+     * @param   sendToggleMessage
+     *          whether to send toggle message if status changed or not
+     * @see     #toggleScoreboard(TabPlayer, boolean)
+     * @see     #hasScoreboardVisible(TabPlayer)
+     */
+    void setScoreboardVisible(@NonNull TabPlayer player, boolean visible, boolean sendToggleMessage);
+    
+    /**
+     * Toggles scoreboard for specified player. If player had scoreboard visible,
+     * hides it. If hidden, shows it. If {@code sendToggleMessage} is {@code true},
+     * toggle message defined in configuration is sent.
+     * 
+     * @param   player
+     *          Player to toggle scoreboard for
+     * @param   sendToggleMessage
+     *          Whether to send toggle message or not
+     * @see     #hasScoreboardVisible(TabPlayer)
+     * @see     #setScoreboardVisible(TabPlayer, boolean, boolean)
+     */
+    void toggleScoreboard(@NonNull TabPlayer player, boolean sendToggleMessage);
+    
+    /**
+     * Temporarily displays scoreboard to all players for specified amount of 
+     * time (in milliseconds). Scoreboard name is either defined in config, or 
+     * through API in {@link #createScoreboard(String, String, List)}.
+     * 
+     * @param   scoreboard
+     *          Scoreboard from config or registered via API
+     * @param   duration
+     *          Duration in milliseconds
+     * @throws  IllegalArgumentException
+     *          if no scoreboard was found with such name or {@code duration}
+     *          is &lt; 0.
+     */
+    void announceScoreboard(@NonNull String scoreboard, int duration);
+
+    /**
+     * Returns player's currently displayed scoreboard. This can be either with
+     * configuration, overridden with commands or the API. Will return {@code null}
+     * if player does not see any scoreboard due to not meeting any display condition.
+     *
+     * @param   player
+     *          player to get active scoreboard of
+     * @return  player's active scoreboard or {@code null} if player has no scoreboard
+     */
+    @Nullable Scoreboard getActiveScoreboard(@NonNull TabPlayer player);
+}

api/src/main/java/me/neznamy/tab/api/tablist/HeaderFooterManager.java

@@ -0,0 +1,58 @@
+package me.neznamy.tab.api.tablist;
+
+import lombok.NonNull;
+import me.neznamy.tab.api.TabAPI;
+import me.neznamy.tab.api.TabPlayer;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * Interface allowing to send header/footer to players.
+ * <p>
+ * Instance can be obtained using {@link TabAPI#getHeaderFooterManager()}.
+ * This requires the Header/footer feature to be enabled in config, otherwise
+ * the method will return {@code null}.
+ */
+@SuppressWarnings("unused") // API class
+public interface HeaderFooterManager {
+
+    /**
+     * Sets raw value of header to specified value. This overrides plugin
+     * configuration until reset is called. Has full placeholder support
+     * and will send update packet whenever a placeholder used inside
+     * changes its value. Use {@code null} to reset value back to original.
+     *
+     * @param   player
+     *          Player to set header for
+     * @param   header
+     *          Raw header value
+     */
+    void setHeader(@NonNull TabPlayer player, @Nullable String header);
+
+    /**
+     * Sets raw value of footer to specified value. This overrides plugin
+     * configuration until reset is called. Has full placeholder support
+     * and will send update packet whenever a placeholder used inside
+     * changes its value. Use {@code null} to reset value back to original.
+     *
+     * @param   player
+     *          Player to set header for
+     * @param   footer
+     *          Raw footer value
+     */
+    void setFooter(@NonNull TabPlayer player, @Nullable String footer);
+
+    /**
+     * Sets raw value of header and footer to specified values. This overrides plugin
+     * configuration until reset is called. Has full placeholder support
+     * and will send update packet whenever a placeholder used inside
+     * changes its value. Use {@code null} to reset value back to original.
+     *
+     * @param   player
+     *          Player to set header for
+     * @param   header
+     *          Raw header value
+     * @param   footer
+     *          Raw footer value
+     */
+    void setHeaderAndFooter(@NonNull TabPlayer player, @Nullable String header, @Nullable String footer);
+}

api/src/main/java/me/neznamy/tab/api/tablist/SortingManager.java

@@ -0,0 +1,46 @@
+package me.neznamy.tab.api.tablist;
+
+import lombok.NonNull;
+import me.neznamy.tab.api.TabAPI;
+import me.neznamy.tab.api.TabPlayer;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * Interface for managing player sorting by directly configuring
+ * team names of players. Instance can be obtained using
+ * {@link TabAPI#getSortingManager()}. If the feature is disabled,
+ * it will return {@code null}.
+ */
+@SuppressWarnings("unused") // API class
+public interface SortingManager {
+
+    /**
+     * Forces new team name for the player until this method is called again with null argument and
+     * performs all actions to change player's team name
+     *
+     * @param   player
+     *          player to set team name of
+     * @param   teamName
+     *          forced team name
+     */
+    void forceTeamName(@NonNull TabPlayer player, @Nullable String teamName);
+
+    /**
+     * Returns forced team name of player or null if not forced
+     *
+     * @param   player
+     *          player to check forced team name of
+     * @return  forced team name of player or null if not forced
+     */
+    @Nullable String getForcedTeamName(@NonNull TabPlayer player);
+
+    /**
+     * Returns original team name of the player set by the plugin.
+     *
+     * @param   player
+     *          Player to get team name of
+     * @return  Player's team name based on configuration.
+     */
+    @NotNull String getOriginalTeamName(@NonNull TabPlayer player);
+}

api/src/main/java/me/neznamy/tab/api/tablist/TabListFormatManager.java

@@ -0,0 +1,202 @@
+package me.neznamy.tab.api.tablist;
+
+import lombok.NonNull;
+import me.neznamy.tab.api.TabAPI;
+import me.neznamy.tab.api.TabPlayer;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * An interface allowing to modify TabList display names
+ * of players.
+ * <p>
+ * Instance can be obtained using {@link TabAPI#getTabListFormatManager()}.
+ * This requires the feature to be enabled in config, otherwise the method will
+ * return {@code null}.
+ */
+@SuppressWarnings("unused") // API class
+public interface TabListFormatManager {
+
+    /**
+     * Changes player's prefix to provided value. Supports placeholders,
+     * as well as any supported RGB formats. Use {@code null} to reset
+     * value back to original.
+     *
+     * @param   player
+     *          player to change prefix of
+     * @param   prefix
+     *          new prefix value
+     * @see     #getCustomPrefix(TabPlayer)
+     * @see     #getOriginalRawPrefix(TabPlayer)
+     */
+    void setPrefix(@NonNull TabPlayer player, @Nullable String prefix);
+
+    /**
+     * Changes player's name to provided value. Supports placeholders,
+     * as well as any supported RGB formats. Use {@code null} to reset
+     * value back to original.
+     *
+     * @param   player
+     *          player to change prefix of
+     * @param   customName
+     *          new customName value
+     * @see     #getCustomName(TabPlayer)
+     * @see     #getOriginalRawName(TabPlayer)
+     */
+    void setName(@NonNull TabPlayer player, @Nullable String customName);
+
+    /**
+     * Changes player's suffix to provided value. Supports placeholders,
+     * as well as any supported RGB formats. Use {@code null} to reset
+     * value back to original.
+     *
+     * @param   player
+     *          player to change prefix of
+     * @param   suffix
+     *          new suffix value
+     * @see     #getCustomSuffix(TabPlayer)
+     * @see     #getOriginalRawSuffix(TabPlayer)
+     */
+    void setSuffix(@NonNull TabPlayer player, @Nullable String suffix);
+
+    /**
+     * Returns prefix assigned using {@link #setPrefix(TabPlayer, String)} method.
+     * If the method was not used, {@code null} is returned.
+     *
+     * @param   player
+     *          player to get custom prefix of
+     * @return  player's custom prefix or {@code null} if not defined
+     * @see     #setPrefix(TabPlayer, String)
+     * @see     #getOriginalRawPrefix(TabPlayer)
+     */
+    @Nullable String getCustomPrefix(@NonNull TabPlayer player);
+
+    /**
+     * Returns custom name assigned using {@link #setName(TabPlayer, String)} method.
+     * If the method was not used, {@code null} is returned.
+     *
+     * @param   player
+     *          player to get custom name of
+     * @return  player's custom name or {@code null} if not defined
+     * @see     #setName(TabPlayer, String)
+     * @see     #getOriginalName(TabPlayer)
+     */
+    @Nullable String getCustomName(@NonNull TabPlayer player);
+
+    /**
+     * Returns suffix assigned using {@link #setSuffix(TabPlayer, String)} method.
+     * If the method was not used, {@code null} is returned.
+     *
+     * @param   player
+     *          player to get custom suffix of
+     * @return  player's custom suffix or {@code null} if not defined
+     * @see     #setSuffix(TabPlayer, String)
+     * @see     #getOriginalSuffix(TabPlayer)
+     */
+    @Nullable String getCustomSuffix(@NonNull TabPlayer player);
+
+    /**
+     * Returns player's original prefix applied using plugin's internal logic.
+     * This value is not affected by API calls in any way.
+     *
+     * @param   player
+     *          player to get original prefix of
+     * @return  player's original prefix
+     * @see     #setPrefix(TabPlayer, String)
+     * @see     #getCustomPrefix(TabPlayer)
+     * @deprecated  Use {@link #getOriginalRawPrefix(TabPlayer)} instead.
+     */
+    @NotNull
+    @Deprecated
+    String getOriginalPrefix(@NonNull TabPlayer player);
+
+    /**
+     * Returns player's original name applied using plugin's internal logic.
+     * This value is not affected by API calls in any way.
+     *
+     * @param   player
+     *          player to get original name of
+     * @return  player's original name
+     * @see     #setName(TabPlayer, String)
+     * @see     #getCustomName(TabPlayer)
+     * @deprecated  Use {@link #getOriginalRawName(TabPlayer)} instead.
+     */
+    @NotNull
+    @Deprecated
+    String getOriginalName(@NonNull TabPlayer player);
+
+    /**
+     * Returns player's original suffix applied using plugin's internal logic.
+     * This value is not affected by API calls in any way.
+     *
+     * @param   player
+     *          player to get original suffix of
+     * @return  player's original suffix
+     * @see     #setSuffix(TabPlayer, String)
+     * @see     #getCustomSuffix(TabPlayer)
+     * @deprecated  Use {@link #getOriginalRawSuffix(TabPlayer)} instead.
+     */
+    @NotNull
+    @Deprecated
+    String getOriginalSuffix(@NonNull TabPlayer player);
+
+    /**
+     * Returns original prefix assigned by the plugin using internal logic.
+     * @param   player
+     *          Player to get original prefix of
+     * @return  Original prefix assigned by the plugin's internal logic.
+     * @see     #getCustomPrefix(TabPlayer)
+     */
+    @NotNull
+    String getOriginalRawPrefix(@NonNull TabPlayer player);
+
+    /**
+     * Returns original name assigned by the plugin using internal logic.
+     * @param   player
+     *          Player to get original name of
+     * @return  Original name assigned by the plugin's internal logic.
+     * @see     #getCustomName(TabPlayer)
+     */
+    @NotNull
+    String getOriginalRawName(@NonNull TabPlayer player);
+
+    /**
+     * Returns original suffix assigned by the plugin using internal logic.
+     * @param   player
+     *          Player to get original suffix of
+     * @return  Original suffix assigned by the plugin's internal logic.
+     * @see     #getCustomSuffix(TabPlayer)
+     */
+    @NotNull
+    String getOriginalRawSuffix(@NonNull TabPlayer player);
+
+    /**
+     * Returns original prefix assigned by the plugin using internal logic with all placeholders replaced.
+     * @param   player
+     *          Player to get replaced original prefix of
+     * @return  Original prefix assigned by the plugin's internal logic.
+     * @see     #getCustomPrefix(TabPlayer)
+     */
+    @NotNull
+    String getOriginalReplacedPrefix(@NonNull TabPlayer player);
+
+    /**
+     * Returns original name assigned by the plugin using internal logic with all placeholders replaced.
+     * @param   player
+     *          Player to get replaced original name of
+     * @return  Original name assigned by the plugin's internal logic.
+     * @see     #getCustomName(TabPlayer)
+     */
+    @NotNull
+    String getOriginalReplacedName(@NonNull TabPlayer player);
+
+    /**
+     * Returns original suffix assigned by the plugin using internal logic with all placeholders replaced.
+     * @param   player
+     *          Player to get replaced original suffix of
+     * @return  Original suffix assigned by the plugin's internal logic.
+     * @see     #getCustomSuffix(TabPlayer)
+     */
+    @NotNull
+    String getOriginalReplacedSuffix(@NonNull TabPlayer player);
+}

api/src/main/java/me/neznamy/tab/api/tablist/layout/Layout.java

@@ -0,0 +1,93 @@
+package me.neznamy.tab.api.tablist.layout;
+
+import lombok.NonNull;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * Interface representing a layout.
+ */
+@SuppressWarnings("unused") // API class
+public interface Layout {
+
+    /**
+     * Returns name of the layout.
+     *
+     * @return  name of the layout
+     */
+    @NotNull String getName();
+
+    /**
+     * Adds fixed slot with specified parameters
+     *
+     * @param   slot
+     *          Slot (1-80)
+     * @param   text
+     *          Text to display
+     */
+    void addFixedSlot(int slot, @NonNull String text);
+
+    /**
+     * Adds fixed slot with specified parameters
+     *
+     * @param   slot
+     *          Slot (1-80)
+     * @param   text
+     *          Text to display
+     * @param   skin
+     *          Skin definition like in config
+     */
+    void addFixedSlot(int slot, @NonNull String text, @NonNull String skin);
+
+    /**
+     * Adds fixed slot with specified parameters
+     *
+     * @param   slot
+     *          Slot (1-80)
+     * @param   text
+     *          Text to display
+     * @param   ping
+     *          Slot's ping
+     */
+    void addFixedSlot(int slot, @NonNull String text, int ping);
+
+    /**
+     * Adds fixed slot with specified parameters
+     *
+     * @param   slot
+     *          Slot (1-80)
+     * @param   text
+     *          Text to display
+     * @param   skin
+     *          Skin definition like in config
+     * @param   ping
+     *          Slot's ping
+     */
+    void addFixedSlot(int slot, @NonNull String text, @NonNull String skin, int ping);
+
+    /**
+     * Adds fixed slot with specified parameters
+     *
+     * @param   slot
+     *          Slot (1-80)
+     * @param   text
+     *          Text to display
+     * @param   skin
+     *          Skin definition like in config
+     * @param   ping
+     *          Slot's ping, accepts placeholders that evaluate to a number
+     */
+    void addFixedSlot(int slot, @NonNull String text, @NonNull String skin, @NonNull String ping);
+
+    /**
+     * Adds a player group.
+     *
+     * @param   condition
+     *          Condition that must be met for player to appear in the group.
+     *          May be null for no requirement. Syntax is like in config -
+     *          either condition name or short format.
+     * @param   slots
+     *          Slots for this player group
+     */
+    void addGroup(@Nullable String condition, int[] slots);
+}

api/src/main/java/me/neznamy/tab/api/tablist/layout/LayoutManager.java

@@ -0,0 +1,70 @@
+package me.neznamy.tab.api.tablist.layout;
+
+import lombok.NonNull;
+import me.neznamy.tab.api.TabAPI;
+import me.neznamy.tab.api.TabPlayer;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * Interface for working with layouts. Instance can be obtained using
+ * {@link TabAPI#getLayoutManager()}. If the feature is disabled in
+ * config, it will return {@code null}.
+ */
+@SuppressWarnings("unused") // API class
+public interface LayoutManager {
+
+    /**
+     * Creates new layout
+     *
+     * @param   name
+     *          Unique layout name
+     * @return  Created layout
+     */
+    @NotNull
+    Layout createNewLayout(@NonNull String name);
+
+    /**
+     * Creates new layout with given name and slot count (1.19.3+ only).
+     *
+     * @param   name
+     *          Unique layout name
+     * @param   slotCount
+     *          Amount of slots to use for 1.19.3+ players
+     * @return  Created layout
+     */
+    @NotNull
+    Layout createNewLayout(@NonNull String name, int slotCount);
+
+    /**
+     * Returns defined layout from config by name. If no such layout is defined in config,
+     * {@code null} is returned.
+     *
+     * @param   name
+     *          Name of layout defined in config
+     * @return  Layout defined in config by name or {@code null} if no such layout is defined
+     */
+    @Nullable
+    Layout getLayout(@NonNull String name);
+
+    /**
+     * Sends layout to player. Set to {@code null} to make player not see
+     * any layout, but default TabList instead.
+     *
+     * @param   player
+     *          Player to send layout to
+     * @param   layout
+     *          Layout to send
+     * @see     #resetLayout(TabPlayer)
+     */
+    void sendLayout(@NonNull TabPlayer player, @Nullable Layout layout);
+
+    /**
+     * Reset layout back to original one based on configuration.
+     *
+     * @param   player
+     *          Player to reset layout for
+     * @see     #sendLayout(TabPlayer, Layout)
+     */
+    void resetLayout(@NonNull TabPlayer player);
+}

build-logic/build.gradle.kts

@@ -0,0 +1,8 @@
+plugins {
+    `kotlin-dsl`
+}
+
+dependencies {
+    implementation("com.gradleup.shadow:shadow-gradle-plugin:9.4.0")
+    implementation("io.freefair.gradle:lombok-plugin:9.2.0")
+}

build-logic/settings.gradle.kts

@@ -0,0 +1,12 @@
+rootProject.name = "build-logic"
+
+dependencyResolutionManagement {
+    repositories {
+        maven("https://maven.fabricmc.net/")
+        maven("https://maven.architectury.dev/")
+        maven("https://maven.minecraftforge.net/")
+        maven("https://maven.neoforged.net/releases/")
+        gradlePluginPortal()
+        mavenCentral()
+    }
+}

build-logic/src/main/kotlin/tab.base-conventions.gradle.kts

@@ -0,0 +1,37 @@
+import org.apache.tools.ant.filters.ReplaceTokens
+
+plugins {
+    `java-library`
+    id("io.freefair.lombok")
+}
+
+tasks {
+    processResources {
+        filter<ReplaceTokens>("tokens" to mapOf(
+            "id" to rootProject.ext.get("id")!!.toString(),
+            "name" to rootProject.name,
+            "version" to project.version,
+            "description" to project.description,
+            "website" to rootProject.ext.get("website")!!.toString(),
+            "author" to rootProject.ext.get("author")!!.toString()
+        ))
+    }
+    javadoc {
+        // This saves a decent bit of processing power on slow machines
+        enabled = false
+        options.encoding = Charsets.UTF_8.name()
+        (options as StandardJavadocDocletOptions).addStringOption("Xdoclint:none", "-quiet")
+    }
+    compileJava {
+        options.encoding = Charsets.UTF_8.name()
+        options.release.set(17)
+        options.compilerArgs.addAll(listOf("-nowarn", "-Xlint:-unchecked", "-Xlint:-deprecation"))
+    }
+}
+
+java {
+    toolchain {
+        languageVersion.set(JavaLanguageVersion.of(17))
+        vendor.set(JvmVendorSpec.GRAAL_VM)
+    }
+}

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

@@ -0,0 +1,26 @@
+plugins {
+    id("tab.standard-conventions")
+    id("com.gradleup.shadow")
+}
+
+tasks.withType<Zip>().configureEach {
+    isZip64 = true
+}
+
+tasks {
+    shadowJar {
+        archiveFileName.set("${rootProject.name}-${project.name}-${project.version}.jar")
+        relocate("org.bstats", "me.neznamy.tab.libs.org.bstats")
+        relocate("org.json.simple", "me.neznamy.tab.libs.org.json.simple")
+        relocate("net.kyori.event", "me.neznamy.tab.libs.net.kyori.event")
+        relocate("me.neznamy.yamlassist", "me.neznamy.tab.libs.me.neznamy.yamlassist")
+        relocate("org.yaml.snakeyaml", "me.neznamy.tab.libs.org.yaml.snakeyaml")
+        relocate("redis.clients.jedis", "me.neznamy.tab.libs.redis.clients.jedis")
+        relocate("org.apache.commons.pool2", "me.neznamy.tab.libs.org.apache.commons.pool2")
+        relocate("org.json", "me.neznamy.tab.libs.org.json")
+        relocate("com.rabbitmq", "me.neznamy.tab.libs.com.rabbitmq")
+        relocate("com.saicone.delivery4j", "me.neznamy.tab.libs.com.saicone.delivery4j")
+        relocate("com.mysql", "me.neznamy.tab.libs.com.mysql")
+        relocate("com.google.protobuf", "me.neznamy.tab.libs.com.google.protobuf")
+    }
+}

build-logic/src/main/kotlin/tab.standard-conventions.gradle.kts

@@ -0,0 +1,8 @@
+plugins {
+    id("tab.base-conventions")
+}
+
+java {
+    withSourcesJar()
+    withJavadocJar()
+}

build.gradle.kts

@@ -0,0 +1,45 @@
+plugins {
+    eclipse
+    id("tab.parent")
+}
+
+allprojects {
+    group = "me.neznamy"
+    version = "5.9.9"
+    description = "An all-in-one solution that works"
+
+    ext.set("id", "tab")
+    ext.set("website", "https://git.trueog.net/trueog/TAB-OG")
+    ext.set("author", "NEZNAMY")
+    ext.set("credits", "Joseph T. McQuigg (JT122406)")
+}
+
+val platformPaths = setOf(
+    ":bukkit",
+    ":bukkit:v1_19_R3",
+    ":bungeecord",
+    ":velocity"
+)
+
+val specialPaths = setOf(
+    ":api",
+    ":shared"
+)
+
+subprojects {
+    when (path) {
+        in platformPaths -> plugins.apply("tab.platform-conventions")
+        in specialPaths -> plugins.apply("tab.standard-conventions")
+        else -> plugins.apply("tab.base-conventions")
+    }
+}
+
+val copyShadowJar by tasks.registering(Copy::class) {
+    dependsOn(":jar:shadowJar")
+    from(project(":jar").tasks.named("shadowJar"))
+    into(layout.buildDirectory.dir("libs"))
+}
+
+tasks.register("build") {
+    dependsOn(copyShadowJar)
+}

bukkit/build.gradle.kts

@@ -0,0 +1,14 @@
+dependencies {
+    api(projects.shared)
+    implementation("org.bstats:bstats-bukkit:3.1.0")
+    compileOnly("org.purpurmc.purpur:purpur-api:1.19.4-R0.1-SNAPSHOT")
+    compileOnly("me.clip:placeholderapi:2.11.6")
+    compileOnly("LibsDisguises:LibsDisguises:10.0.21") {
+        exclude("org.spigotmc", "spigot")
+        exclude("org.spigotmc", "spigot-api")
+        exclude("com.github.dmulloy2", "ProtocolLib")
+        exclude("org.ow2.asm", "asm")
+        exclude("net.md-5", "bungeecord-chat")
+    }
+    compileOnly("com.github.LeonMangler:PremiumVanishAPI:2.8.8")
+}

bukkit/paper_1_20_5/build.gradle.kts

@@ -0,0 +1,28 @@
+plugins {
+    id("io.papermc.paperweight.userdev") version "2.0.0-beta.19"
+}
+
+repositories {
+    maven("https://jitpack.io") // YamlAssist
+    maven("https://repo.opencollab.dev/maven-snapshots/")
+    maven("https://repo.viaversion.com/")
+    maven {
+        name = "luck-repo"
+        url = uri("https://repo.lucko.me/")
+        content {
+            includeModule("me.lucko", "spark-api")
+        }
+    }
+}
+
+val version = "1.20.6-R0.1-SNAPSHOT" // 1.20.5 has a broken dependency, but there were no changes, so it's ok
+
+dependencies {
+    implementation(projects.bukkit)
+    paperweight.paperDevBundle(version)
+    compileOnly("io.papermc.paper:paper-api:${version}")
+}
+
+tasks.compileJava {
+    options.release.set(21)
+}

bukkit/paper_1_20_5/src/main/java/me/neznamy/tab/platforms/bukkit/paper_1_20_5/NMSComponentConverter.java

@@ -0,0 +1,64 @@
+package me.neznamy.tab.platforms.bukkit.paper_1_20_5;
+
+import me.neznamy.tab.shared.chat.TabStyle;
+import me.neznamy.tab.shared.chat.component.object.TabAtlasSprite;
+import me.neznamy.tab.shared.chat.component.object.TabObjectComponent;
+import me.neznamy.tab.platforms.bukkit.provider.ComponentConverter;
+import me.neznamy.tab.shared.chat.component.object.TabPlayerSprite;
+import net.minecraft.network.chat.*;
+import net.minecraft.resources.ResourceLocation;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Component converter using direct mojang-mapped code.
+ */
+public class NMSComponentConverter extends ComponentConverter<Component> {
+
+    @Override
+    @NotNull
+    public Component newTextComponent(@NotNull String text) {
+        return Component.literal(text);
+    }
+
+    @Override
+    @NotNull
+    public Component newTranslatableComponent(@NotNull String key) {
+        return Component.translatable(key);
+    }
+
+    @Override
+    @NotNull
+    public Component newKeybindComponent(@NotNull String keybind) {
+        return Component.keybind(keybind);
+    }
+
+    @Override
+    @NotNull
+    public Component newObjectComponent(@NotNull TabAtlasSprite sprite) {
+        return Component.literal(TabObjectComponent.ERROR_MESSAGE);
+    }
+
+    @Override
+    @NotNull
+    public Component newObjectComponent(@NotNull TabPlayerSprite sprite) {
+        return Component.literal(TabObjectComponent.ERROR_MESSAGE);
+    }
+
+    @Override
+    public void applyStyle(@NotNull Component nmsComponent, @NotNull TabStyle modifier) {
+        Style style = Style.EMPTY
+                .withColor(modifier.getColor() == null ? null : TextColor.fromRgb(modifier.getColor().getRgb()))
+                .withBold(modifier.getBold())
+                .withItalic(modifier.getItalic())
+                .withUnderlined(modifier.getUnderlined())
+                .withStrikethrough(modifier.getStrikethrough())
+                .withObfuscated(modifier.getObfuscated())
+                .withFont(modifier.getFont() == null ? null : ResourceLocation.tryParse(modifier.getFont()));
+        ((MutableComponent)nmsComponent).setStyle(style);
+    }
+
+    @Override
+    public void addSibling(@NotNull Component parent, @NotNull Component child) {
+        ((MutableComponent)parent).append(child);
+    }
+}

bukkit/paper_1_20_5/src/main/java/me/neznamy/tab/platforms/bukkit/paper_1_20_5/NMSImplementationProvider.java

@@ -0,0 +1,52 @@
+package me.neznamy.tab.platforms.bukkit.paper_1_20_5;
+
+import io.netty.channel.Channel;
+import lombok.Getter;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.platforms.bukkit.provider.ComponentConverter;
+import me.neznamy.tab.platforms.bukkit.provider.ImplementationProvider;
+import me.neznamy.tab.shared.platform.Scoreboard;
+import me.neznamy.tab.shared.platform.TabList;
+import me.neznamy.tab.shared.platform.TabListEntryTracker;
+import org.bukkit.craftbukkit.entity.CraftPlayer;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Implementation provider using direct Mojang-mapped NMS code for paper 1.20.5 - 1.21.1.
+ */
+@Getter
+public class NMSImplementationProvider implements ImplementationProvider {
+
+    @NotNull
+    private final ComponentConverter<?> componentConverter = new NMSComponentConverter();
+    
+    @Override
+    @NotNull
+    public Scoreboard newScoreboard(@NotNull BukkitTabPlayer player) {
+        return new NMSPacketScoreboard(player);
+    }
+
+    @Override
+    @NotNull
+    public TabList newTabList(@NotNull BukkitTabPlayer player) {
+        return new NMSPacketTabList(player);
+    }
+
+    @Override
+    @NotNull
+    public Channel getChannel(@NotNull Player player) {
+        return ((CraftPlayer)player).getHandle().connection.connection.channel;
+    }
+
+    @Override
+    @NotNull
+    public TabListEntryTracker newTabListEntryTracker() {
+        return new NMSTabListEntryTracker();
+    }
+
+    @Override
+    public int getPing(@NotNull BukkitTabPlayer player) {
+        return player.getPlayer().getPing();
+    }
+}

bukkit/paper_1_20_5/src/main/java/me/neznamy/tab/platforms/bukkit/paper_1_20_5/NMSPacketScoreboard.java

@@ -0,0 +1,176 @@
+package me.neznamy.tab.platforms.bukkit.paper_1_20_5;
+
+import lombok.NonNull;
+import lombok.SneakyThrows;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.platform.decorators.SafeScoreboard;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import net.minecraft.ChatFormatting;
+import net.minecraft.network.chat.numbers.FixedFormat;
+import net.minecraft.network.protocol.Packet;
+import net.minecraft.network.protocol.game.*;
+import net.minecraft.world.scores.PlayerTeam;
+import net.minecraft.world.scores.Scoreboard;
+import net.minecraft.world.scores.criteria.ObjectiveCriteria;
+import net.minecraft.world.scores.criteria.ObjectiveCriteria.RenderType;
+import org.bukkit.craftbukkit.entity.CraftPlayer;
+import org.jetbrains.annotations.NotNull;
+
+import java.lang.reflect.Field;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Optional;
+
+/**
+ * Scoreboard implementation using direct mojang-mapped code.
+ */
+public class NMSPacketScoreboard extends SafeScoreboard<BukkitTabPlayer> {
+
+    private static final ChatFormatting[] formats = ChatFormatting.values();
+    private static final net.minecraft.world.scores.Team.CollisionRule[] collisions = net.minecraft.world.scores.Team.CollisionRule.values();
+    private static final net.minecraft.world.scores.Team.Visibility[] visibilities = net.minecraft.world.scores.Team.Visibility.values();
+    private static final Scoreboard dummyScoreboard = new Scoreboard();
+    private static final Field players = ReflectionUtils.getOnlyField(ClientboundSetPlayerTeamPacket.class, Collection.class);
+
+    /**
+     * Constructs new instance with given player.
+     *
+     * @param   player
+     *          Player this scoreboard will belong to
+     */
+    public NMSPacketScoreboard(@NotNull BukkitTabPlayer player) {
+        super(player);
+    }
+
+    @Override
+    public void registerObjective(@NonNull Objective objective) {
+        net.minecraft.world.scores.Objective obj = new net.minecraft.world.scores.Objective(
+                dummyScoreboard,
+                objective.getName(),
+                ObjectiveCriteria.DUMMY,
+                objective.getTitle().convert(),
+                RenderType.values()[objective.getHealthDisplay().ordinal()],
+                false,
+                objective.getNumberFormat() == null ? null : objective.getNumberFormat().toFixedFormat(FixedFormat::new)
+        );
+        objective.setPlatformObjective(obj);
+        sendPacket(new ClientboundSetObjectivePacket(obj, ObjectiveAction.REGISTER));
+    }
+
+    @Override
+    public void setDisplaySlot(@NonNull Objective objective) {
+        sendPacket(new ClientboundSetDisplayObjectivePacket(
+                net.minecraft.world.scores.DisplaySlot.values()[objective.getDisplaySlot().ordinal()],
+                (net.minecraft.world.scores.Objective) objective.getPlatformObjective()
+        ));
+    }
+
+    @Override
+    public void unregisterObjective(@NonNull Objective objective) {
+        sendPacket(new ClientboundSetObjectivePacket((net.minecraft.world.scores.Objective) objective.getPlatformObjective(), ObjectiveAction.UNREGISTER));
+    }
+
+    @Override
+    public void updateObjective(@NonNull Objective objective) {
+        net.minecraft.world.scores.Objective obj = (net.minecraft.world.scores.Objective) objective.getPlatformObjective();
+        obj.setDisplayName(objective.getTitle().convert());
+        obj.setRenderType(RenderType.values()[objective.getHealthDisplay().ordinal()]);
+        sendPacket(new ClientboundSetObjectivePacket(obj, ObjectiveAction.UPDATE));
+    }
+
+    @Override
+    public void setScore(@NonNull Score score) {
+        sendPacket(new ClientboundSetScorePacket(
+                score.getHolder(),
+                score.getObjective().getName(),
+                score.getValue(),
+                Optional.ofNullable(score.getDisplayName() == null ? null : score.getDisplayName().convert()),
+                Optional.ofNullable(score.getNumberFormat() == null ? null : score.getNumberFormat().toFixedFormat(FixedFormat::new))
+        ));
+    }
+
+    @Override
+    public void removeScore(@NonNull Score score) {
+        sendPacket(new ClientboundResetScorePacket(score.getHolder(), score.getObjective().getName()));
+    }
+
+    @Override
+    @NotNull
+    public Object createTeam(@NonNull String name) {
+        return new PlayerTeam(dummyScoreboard, name);
+    }
+
+    @Override
+    public void registerTeam(@NonNull Team team) {
+        updateTeamProperties(team);
+        PlayerTeam t = (PlayerTeam) team.getPlatformTeam();
+        t.getPlayers().addAll(team.getPlayers());
+        sendPacket(ClientboundSetPlayerTeamPacket.createAddOrModifyPacket(t, true));
+    }
+
+    @Override
+    public void unregisterTeam(@NonNull Team team) {
+        sendPacket(ClientboundSetPlayerTeamPacket.createRemovePacket((PlayerTeam) team.getPlatformTeam()));
+    }
+
+    @Override
+    public void updateTeam(@NonNull Team team) {
+        updateTeamProperties(team);
+        sendPacket(ClientboundSetPlayerTeamPacket.createAddOrModifyPacket((PlayerTeam) team.getPlatformTeam(), false));
+    }
+
+    private void updateTeamProperties(@NonNull Team team) {
+        PlayerTeam t = (PlayerTeam) team.getPlatformTeam();
+        t.setAllowFriendlyFire((team.getOptions() & 0x01) != 0);
+        t.setSeeFriendlyInvisibles((team.getOptions() & 0x02) != 0);
+        t.setColor(formats[team.getColor().ordinal()]);
+        t.setCollisionRule(collisions[team.getCollision().ordinal()]);
+        t.setNameTagVisibility(visibilities[team.getVisibility().ordinal()]);
+        t.setPlayerPrefix(team.getPrefix().convert());
+        t.setPlayerSuffix(team.getSuffix().convert());
+    }
+
+    @Override
+    @SneakyThrows
+    @NotNull
+    public Object onPacketSend(@NonNull Object packet) {
+        if (packet instanceof ClientboundSetDisplayObjectivePacket display) {
+            TAB.getInstance().getFeatureManager().onDisplayObjective(player, display.getSlot().ordinal(), display.getObjectiveName());
+        }
+        if (packet instanceof ClientboundSetObjectivePacket objective) {
+            TAB.getInstance().getFeatureManager().onObjective(player, objective.getMethod(), objective.getObjectiveName());
+        }
+        if (packet instanceof ClientboundSetPlayerTeamPacket team) {
+            int action = getMethod(team);
+            if (action != TeamAction.UPDATE) {
+                players.set(team, onTeamPacket(action, team.getName(), team.getPlayers() == null ? Collections.emptyList() : team.getPlayers()));
+            }
+        }
+        return packet;
+    }
+
+    private int getMethod(@NonNull ClientboundSetPlayerTeamPacket team) {
+        if (team.getTeamAction() == ClientboundSetPlayerTeamPacket.Action.ADD) {
+            return 0;
+        } else if (team.getTeamAction() == ClientboundSetPlayerTeamPacket.Action.REMOVE) {
+            return 1;
+        } else if (team.getPlayerAction() == ClientboundSetPlayerTeamPacket.Action.ADD) {
+            return 3;
+        } else if (team.getPlayerAction() == ClientboundSetPlayerTeamPacket.Action.REMOVE) {
+            return 4;
+        } else {
+            return 2;
+        }
+    }
+
+    /**
+     * Sends the packet to the player.
+     *
+     * @param   packet
+     *          Packet to send
+     */
+    private void sendPacket(@NotNull Packet<?> packet) {
+        ((CraftPlayer)player.getPlayer()).getHandle().connection.sendPacket(packet);
+    }
+}

bukkit/paper_1_20_5/src/main/java/me/neznamy/tab/platforms/bukkit/paper_1_20_5/NMSPacketTabList.java

@@ -0,0 +1,200 @@
+package me.neznamy.tab.platforms.bukkit.paper_1_20_5;
+
+import com.mojang.authlib.GameProfile;
+import com.mojang.authlib.properties.Property;
+import lombok.NonNull;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.chat.component.TabComponent;
+import me.neznamy.tab.shared.platform.TabList;
+import me.neznamy.tab.shared.platform.decorators.TrackedTabList;
+import net.minecraft.network.chat.Component;
+import net.minecraft.network.protocol.Packet;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoRemovePacket;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoUpdatePacket;
+import net.minecraft.network.protocol.game.ClientboundTabListPacket;
+import net.minecraft.world.level.GameType;
+import org.bukkit.craftbukkit.entity.CraftPlayer;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.*;
+
+/**
+ * TabList implementation using direct mojang-mapped code.
+ */
+public class NMSPacketTabList extends TrackedTabList<BukkitTabPlayer> {
+
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> addPlayer = EnumSet.allOf(ClientboundPlayerInfoUpdatePacket.Action.class);
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> updateDisplayName = EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_DISPLAY_NAME);
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> updateLatency = EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_LATENCY);
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> updateGameMode = EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_GAME_MODE);
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> updateListed = EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_LISTED);
+
+    /**
+     * Constructs new instance.
+     *
+     * @param   player
+     *          Player this tablist will belong to
+     */
+    public NMSPacketTabList(@NotNull BukkitTabPlayer player) {
+        super(player);
+    }
+
+    @Override
+    public void removeEntry(@NonNull UUID entry) {
+        sendPacket(new ClientboundPlayerInfoRemovePacket(Collections.singletonList(entry)));
+    }
+
+    @Override
+    public void updateDisplayName0(@NonNull UUID entry, @Nullable TabComponent displayName) {
+        sendPacket(updateDisplayName, entry, "", null, false, 0, 0, displayName);
+    }
+
+    @Override
+    public void updateLatency(@NonNull UUID entry, int latency) {
+        sendPacket(updateLatency, entry, "", null, false, latency, 0, null);
+    }
+
+    @Override
+    public void updateGameMode(@NonNull UUID entry, int gameMode) {
+        sendPacket(updateGameMode, entry, "", null, false, 0, gameMode, null);
+    }
+
+    @Override
+    public void updateListed(@NonNull UUID entry, boolean listed) {
+        sendPacket(updateListed, entry, "", null, listed, 0, 0, null);
+    }
+
+    @Override
+    public void updateListOrder(@NonNull UUID entry, int listOrder) {
+        // Added in 1.21.2
+    }
+
+    @Override
+    public void updateHat(@NonNull UUID entry, boolean showHat) {
+        // Added in 1.21.4
+    }
+
+    @Override
+    public void addEntry0(@NonNull Entry entry) {
+        sendPacket(addPlayer, entry.getUniqueId(), entry.getName(), entry.getSkin(), entry.isListed(), entry.getLatency(),
+                entry.getGameMode(), entry.getDisplayName());
+    }
+
+    @Override
+    public void setPlayerListHeaderFooter0(@NonNull TabComponent header, @NonNull TabComponent footer) {
+        sendPacket(new ClientboundTabListPacket(header.convert(), footer.convert()));
+    }
+
+    @Override
+    @Nullable
+    public Skin getSkin() {
+        Collection<Property> properties = ((CraftPlayer)player.getPlayer()).getProfile().getProperties().get(TEXTURES_PROPERTY);
+        if (properties.isEmpty()) return null; // Offline mode
+        Property property = properties.iterator().next();
+        return new Skin(property.value(), property.signature());
+    }
+
+    @Override
+    @NotNull
+    public Object onPacketSend(@NonNull Object packet) {
+        if (packet instanceof ClientboundTabListPacket tablist) {
+            if (header == null || footer == null) return packet;
+            if (tablist.header() != header.convert() || tablist.footer() != footer.convert()) {
+                return new ClientboundTabListPacket(header.convert(), footer.convert());
+            }
+        }
+        if (packet instanceof ClientboundPlayerInfoUpdatePacket info) {
+            EnumSet<ClientboundPlayerInfoUpdatePacket.Action> actions = info.actions();
+            List<ClientboundPlayerInfoUpdatePacket.Entry> updatedList = new ArrayList<>();
+            boolean rewritePacket = false;
+            for (ClientboundPlayerInfoUpdatePacket.Entry nmsData : info.entries()) {
+                boolean rewriteEntry = false;
+                Component displayName = nmsData.displayName();
+                int latency = nmsData.latency();
+                int gameMode = nmsData.gameMode().getId();
+                boolean listed = nmsData.listed();
+                if (actions.contains(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_DISPLAY_NAME)) {
+                    TabComponent forcedDisplayName = getForcedDisplayNames().get(nmsData.profileId());
+                    if (forcedDisplayName != null && forcedDisplayName.convert() != displayName) {
+                        displayName = forcedDisplayName.convert();
+                        rewriteEntry = rewritePacket = true;
+                    }
+                }
+                if (actions.contains(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_GAME_MODE)) {
+                    if (getBlockedSpectators().contains(nmsData.profileId()) && gameMode == 3) {
+                        gameMode = 0;
+                        rewriteEntry = rewritePacket = true;
+                    }
+                }
+                if (actions.contains(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_LATENCY)) {
+                    if (getForcedLatency() != null) {
+                        latency = getForcedLatency();
+                        rewriteEntry = rewritePacket = true;
+                    }
+                }
+                if (actions.contains(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_LISTED)) {
+                    if (allPlayersHidden && nmsData.profileId().getMostSignificantBits() != 0) { // Filter out layout entries
+                        listed = false;
+                        rewriteEntry = rewritePacket = true;
+                    }
+                }
+                if (actions.contains(ClientboundPlayerInfoUpdatePacket.Action.ADD_PLAYER)) {
+                    TAB.getInstance().getFeatureManager().onEntryAdd(player, nmsData.profileId(), nmsData.profile().getName());
+                }
+                updatedList.add(rewriteEntry ? new ClientboundPlayerInfoUpdatePacket.Entry(
+                        nmsData.profileId(), nmsData.profile(), listed, latency, GameType.byId(gameMode), displayName,
+                        nmsData.chatSession()
+                ) : nmsData);
+            }
+            if (rewritePacket) return new ClientboundPlayerInfoUpdatePacket(actions, updatedList);
+        }
+        return packet;
+    }
+
+    private void sendPacket(@NonNull EnumSet<ClientboundPlayerInfoUpdatePacket.Action> action, @NonNull UUID id, @NonNull String name, @Nullable Skin skin,
+                            boolean listed, int latency, int gameMode, @Nullable TabComponent displayName) {
+        ClientboundPlayerInfoUpdatePacket packet = new ClientboundPlayerInfoUpdatePacket(action, new ClientboundPlayerInfoUpdatePacket.Entry(
+                id,
+                action.contains(ClientboundPlayerInfoUpdatePacket.Action.ADD_PLAYER) ? createProfile(id, name, skin) : null,
+                listed,
+                latency,
+                GameType.byId(gameMode),
+                displayName == null ? null : displayName.convert(),
+                null
+        ));
+        sendPacket(packet);
+    }
+
+    /**
+     * Creates GameProfile from given parameters.
+     *
+     * @param   id
+     *          Profile ID
+     * @param   name
+     *          Profile name
+     * @param   skin
+     *          Player skin
+     * @return  GameProfile from given parameters
+     */
+    @NotNull
+    private GameProfile createProfile(@NonNull UUID id, @NonNull String name, @Nullable Skin skin) {
+        GameProfile profile = new GameProfile(id, name);
+        if (skin != null) {
+            profile.getProperties().put(TabList.TEXTURES_PROPERTY,
+                    new Property(TabList.TEXTURES_PROPERTY, skin.getValue(), skin.getSignature()));
+        }
+        return profile;
+    }
+
+    /**
+     * Sends the packet to the player.
+     *
+     * @param   packet
+     *          Packet to send
+     */
+    private void sendPacket(@NotNull Packet<?> packet) {
+        ((CraftPlayer)player.getPlayer()).getHandle().connection.send(packet);
+    }
+}

bukkit/paper_1_20_5/src/main/java/me/neznamy/tab/platforms/bukkit/paper_1_20_5/NMSTabListEntryTracker.java

@@ -0,0 +1,30 @@
+package me.neznamy.tab.platforms.bukkit.paper_1_20_5;
+
+import me.neznamy.tab.shared.platform.TabListEntryTracker;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoRemovePacket;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoUpdatePacket;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.UUID;
+
+/**
+ * Implementation of TabListEntryTracker.
+ */
+public class NMSTabListEntryTracker extends TabListEntryTracker {
+
+    @Override
+    public void onPacketSend(@NotNull Object packet) {
+        if (packet instanceof ClientboundPlayerInfoRemovePacket remove) {
+            for (UUID id : remove.profileIds()) {
+                tablistEntries.remove(id);
+            }
+        }
+        if (packet instanceof ClientboundPlayerInfoUpdatePacket update) {
+            if (update.actions().contains(ClientboundPlayerInfoUpdatePacket.Action.ADD_PLAYER)) {
+                for (ClientboundPlayerInfoUpdatePacket.Entry nmsData : update.entries()) {
+                    tablistEntries.add(nmsData.profileId());
+                }
+            }
+        }
+    }
+}

bukkit/paper_1_21_11/build.gradle.kts

@@ -0,0 +1,28 @@
+plugins {
+    id("io.papermc.paperweight.userdev") version "2.0.0-beta.19"
+}
+
+repositories {
+    maven("https://jitpack.io") // YamlAssist
+    maven("https://repo.opencollab.dev/maven-snapshots/")
+    maven("https://repo.viaversion.com/")
+    maven {
+        name = "luck-repo"
+        url = uri("https://repo.lucko.me/")
+        content {
+            includeModule("me.lucko", "spark-api")
+        }
+    }
+}
+
+val version = "1.21.11-R0.1-SNAPSHOT"
+
+dependencies {
+    implementation(projects.bukkit)
+    paperweight.paperDevBundle(version)
+    compileOnly("io.papermc.paper:paper-api:${version}")
+}
+
+tasks.compileJava {
+    options.release.set(21)
+}

bukkit/paper_1_21_11/src/main/java/me/neznamy/tab/platforms/bukkit/paper_1_21_11/NMSComponentConverter.java

@@ -0,0 +1,84 @@
+package me.neznamy.tab.platforms.bukkit.paper_1_21_11;
+
+import com.google.common.collect.ImmutableMultimap;
+import com.mojang.authlib.GameProfile;
+import com.mojang.authlib.properties.Property;
+import com.mojang.authlib.properties.PropertyMap;
+import me.neznamy.tab.platforms.bukkit.provider.ComponentConverter;
+import me.neznamy.tab.shared.chat.TabStyle;
+import me.neznamy.tab.shared.chat.component.object.TabAtlasSprite;
+import me.neznamy.tab.shared.chat.component.object.TabPlayerSprite;
+import me.neznamy.tab.shared.platform.TabList;
+import net.minecraft.network.chat.*;
+import net.minecraft.network.chat.contents.objects.AtlasSprite;
+import net.minecraft.network.chat.contents.objects.PlayerSprite;
+import net.minecraft.resources.Identifier;
+import net.minecraft.world.item.component.ResolvableProfile;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Component converter using direct mojang-mapped code.
+ */
+public class NMSComponentConverter extends ComponentConverter<Component> {
+
+    @Override
+    @NotNull
+    public Component newTextComponent(@NotNull String text) {
+        return Component.literal(text);
+    }
+
+    @Override
+    @NotNull
+    public Component newTranslatableComponent(@NotNull String key) {
+        return Component.translatable(key);
+    }
+
+    @Override
+    @NotNull
+    public Component newKeybindComponent(@NotNull String keybind) {
+        return Component.keybind(keybind);
+    }
+
+    @Override
+    @NotNull
+    public Component newObjectComponent(@NotNull TabAtlasSprite sprite) {
+        return Component.object(new AtlasSprite(Identifier.parse(sprite.getAtlas()), Identifier.parse(sprite.getSprite())));
+    }
+
+    @Override
+    @NotNull
+    public Component newObjectComponent(@NotNull TabPlayerSprite sprite) {
+        ResolvableProfile profile;
+        if (sprite.getId() != null) {
+            profile = ResolvableProfile.createUnresolved(sprite.getId());
+        } else if (sprite.getName() != null) {
+            profile = ResolvableProfile.createUnresolved(sprite.getName());
+        } else if (sprite.getSkin() != null) {
+            ImmutableMultimap.Builder<String, Property> builder = ImmutableMultimap.builder();
+            builder.put(TabList.TEXTURES_PROPERTY, new Property(TabList.TEXTURES_PROPERTY, sprite.getSkin().getValue(), sprite.getSkin().getSignature()));
+            profile = ResolvableProfile.createResolved(new GameProfile(NIL_UUID, "", new PropertyMap(builder.build())));
+        } else {
+            throw new IllegalStateException("Player head component does not have id, name or skin set");
+        }
+        return Component.object(new PlayerSprite(profile, sprite.isShowHat()));
+    }
+
+    @Override
+    public void applyStyle(@NotNull Component nmsComponent, @NotNull TabStyle modifier) {
+        Style style = Style.EMPTY
+                .withColor(modifier.getColor() == null ? null : TextColor.fromRgb(modifier.getColor().getRgb()))
+                .withBold(modifier.getBold())
+                .withItalic(modifier.getItalic())
+                .withUnderlined(modifier.getUnderlined())
+                .withStrikethrough(modifier.getStrikethrough())
+                .withObfuscated(modifier.getObfuscated())
+                .withFont(modifier.getFont() == null ? null : new FontDescription.Resource(Identifier.parse(modifier.getFont())));
+        if (modifier.getShadowColor() != null) style = style.withShadowColor(modifier.getShadowColor()); // withShadowColor takes int instead of Integer, bug?
+        ((MutableComponent)nmsComponent).setStyle(style);
+    }
+
+    @Override
+    public void addSibling(@NotNull Component parent, @NotNull Component child) {
+        ((MutableComponent)parent).append(child);
+    }
+}

bukkit/paper_1_21_11/src/main/java/me/neznamy/tab/platforms/bukkit/paper_1_21_11/NMSImplementationProvider.java

@@ -0,0 +1,52 @@
+package me.neznamy.tab.platforms.bukkit.paper_1_21_11;
+
+import io.netty.channel.Channel;
+import lombok.Getter;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.platforms.bukkit.provider.ComponentConverter;
+import me.neznamy.tab.platforms.bukkit.provider.ImplementationProvider;
+import me.neznamy.tab.shared.platform.Scoreboard;
+import me.neznamy.tab.shared.platform.TabList;
+import me.neznamy.tab.shared.platform.TabListEntryTracker;
+import org.bukkit.craftbukkit.entity.CraftPlayer;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Implementation provider using direct Mojang-mapped NMS code for paper 1.21.11.
+ */
+@Getter
+public class NMSImplementationProvider implements ImplementationProvider {
+
+    @NotNull
+    private final ComponentConverter<?> componentConverter = new NMSComponentConverter();
+    
+    @Override
+    @NotNull
+    public Scoreboard newScoreboard(@NotNull BukkitTabPlayer player) {
+        return new NMSPacketScoreboard(player);
+    }
+
+    @Override
+    @NotNull
+    public TabList newTabList(@NotNull BukkitTabPlayer player) {
+        return new NMSPacketTabList(player);
+    }
+
+    @Override
+    @NotNull
+    public Channel getChannel(@NotNull Player player) {
+        return ((CraftPlayer)player).getHandle().connection.connection.channel;
+    }
+
+    @Override
+    @NotNull
+    public TabListEntryTracker newTabListEntryTracker() {
+        return new NMSTabListEntryTracker();
+    }
+
+    @Override
+    public int getPing(@NotNull BukkitTabPlayer player) {
+        return player.getPlayer().getPing();
+    }
+}

bukkit/paper_1_21_11/src/main/java/me/neznamy/tab/platforms/bukkit/paper_1_21_11/NMSPacketScoreboard.java

@@ -0,0 +1,176 @@
+package me.neznamy.tab.platforms.bukkit.paper_1_21_11;
+
+import lombok.NonNull;
+import lombok.SneakyThrows;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.platform.decorators.SafeScoreboard;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import net.minecraft.ChatFormatting;
+import net.minecraft.network.chat.numbers.FixedFormat;
+import net.minecraft.network.protocol.Packet;
+import net.minecraft.network.protocol.game.*;
+import net.minecraft.world.scores.PlayerTeam;
+import net.minecraft.world.scores.Scoreboard;
+import net.minecraft.world.scores.criteria.ObjectiveCriteria;
+import net.minecraft.world.scores.criteria.ObjectiveCriteria.RenderType;
+import org.bukkit.craftbukkit.entity.CraftPlayer;
+import org.jetbrains.annotations.NotNull;
+
+import java.lang.reflect.Field;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Optional;
+
+/**
+ * Scoreboard implementation using direct mojang-mapped code.
+ */
+public class NMSPacketScoreboard extends SafeScoreboard<BukkitTabPlayer> {
+
+    private static final ChatFormatting[] formats = ChatFormatting.values();
+    private static final net.minecraft.world.scores.Team.CollisionRule[] collisions = net.minecraft.world.scores.Team.CollisionRule.values();
+    private static final net.minecraft.world.scores.Team.Visibility[] visibilities = net.minecraft.world.scores.Team.Visibility.values();
+    private static final Scoreboard dummyScoreboard = new Scoreboard();
+    private static final Field players = ReflectionUtils.getOnlyField(ClientboundSetPlayerTeamPacket.class, Collection.class);
+
+    /**
+     * Constructs new instance with given player.
+     *
+     * @param   player
+     *          Player this scoreboard will belong to
+     */
+    public NMSPacketScoreboard(@NotNull BukkitTabPlayer player) {
+        super(player);
+    }
+
+    @Override
+    public void registerObjective(@NonNull Objective objective) {
+        net.minecraft.world.scores.Objective obj = new net.minecraft.world.scores.Objective(
+                dummyScoreboard,
+                objective.getName(),
+                ObjectiveCriteria.DUMMY,
+                objective.getTitle().convert(),
+                RenderType.values()[objective.getHealthDisplay().ordinal()],
+                false,
+                objective.getNumberFormat() == null ? null : objective.getNumberFormat().toFixedFormat(FixedFormat::new)
+        );
+        objective.setPlatformObjective(obj);
+        sendPacket(new ClientboundSetObjectivePacket(obj, ObjectiveAction.REGISTER));
+    }
+
+    @Override
+    public void setDisplaySlot(@NonNull Objective objective) {
+        sendPacket(new ClientboundSetDisplayObjectivePacket(
+                net.minecraft.world.scores.DisplaySlot.values()[objective.getDisplaySlot().ordinal()],
+                (net.minecraft.world.scores.Objective) objective.getPlatformObjective()
+        ));
+    }
+
+    @Override
+    public void unregisterObjective(@NonNull Objective objective) {
+        sendPacket(new ClientboundSetObjectivePacket((net.minecraft.world.scores.Objective) objective.getPlatformObjective(), ObjectiveAction.UNREGISTER));
+    }
+
+    @Override
+    public void updateObjective(@NonNull Objective objective) {
+        net.minecraft.world.scores.Objective obj = (net.minecraft.world.scores.Objective) objective.getPlatformObjective();
+        obj.setDisplayName(objective.getTitle().convert());
+        obj.setRenderType(RenderType.values()[objective.getHealthDisplay().ordinal()]);
+        sendPacket(new ClientboundSetObjectivePacket(obj, ObjectiveAction.UPDATE));
+    }
+
+    @Override
+    public void setScore(@NonNull Score score) {
+        sendPacket(new ClientboundSetScorePacket(
+                score.getHolder(),
+                score.getObjective().getName(),
+                score.getValue(),
+                Optional.ofNullable(score.getDisplayName() == null ? null : score.getDisplayName().convert()),
+                Optional.ofNullable(score.getNumberFormat() == null ? null : score.getNumberFormat().toFixedFormat(FixedFormat::new))
+        ));
+    }
+
+    @Override
+    public void removeScore(@NonNull Score score) {
+        sendPacket(new ClientboundResetScorePacket(score.getHolder(), score.getObjective().getName()));
+    }
+
+    @Override
+    @NotNull
+    public Object createTeam(@NonNull String name) {
+        return new PlayerTeam(dummyScoreboard, name);
+    }
+
+    @Override
+    public void registerTeam(@NonNull Team team) {
+        updateTeamProperties(team);
+        PlayerTeam t = (PlayerTeam) team.getPlatformTeam();
+        t.getPlayers().addAll(team.getPlayers());
+        sendPacket(ClientboundSetPlayerTeamPacket.createAddOrModifyPacket(t, true));
+    }
+
+    @Override
+    public void unregisterTeam(@NonNull Team team) {
+        sendPacket(ClientboundSetPlayerTeamPacket.createRemovePacket((PlayerTeam) team.getPlatformTeam()));
+    }
+
+    @Override
+    public void updateTeam(@NonNull Team team) {
+        updateTeamProperties(team);
+        sendPacket(ClientboundSetPlayerTeamPacket.createAddOrModifyPacket((PlayerTeam) team.getPlatformTeam(), false));
+    }
+
+    private void updateTeamProperties(@NonNull Team team) {
+        PlayerTeam t = (PlayerTeam) team.getPlatformTeam();
+        t.setAllowFriendlyFire((team.getOptions() & 0x01) != 0);
+        t.setSeeFriendlyInvisibles((team.getOptions() & 0x02) != 0);
+        t.setColor(formats[team.getColor().ordinal()]);
+        t.setCollisionRule(collisions[team.getCollision().ordinal()]);
+        t.setNameTagVisibility(visibilities[team.getVisibility().ordinal()]);
+        t.setPlayerPrefix(team.getPrefix().convert());
+        t.setPlayerSuffix(team.getSuffix().convert());
+    }
+
+    @Override
+    @SneakyThrows
+    @NotNull
+    public Object onPacketSend(@NonNull Object packet) {
+        if (packet instanceof ClientboundSetDisplayObjectivePacket display) {
+            TAB.getInstance().getFeatureManager().onDisplayObjective(player, display.getSlot().ordinal(), display.getObjectiveName());
+        }
+        if (packet instanceof ClientboundSetObjectivePacket objective) {
+            TAB.getInstance().getFeatureManager().onObjective(player, objective.getMethod(), objective.getObjectiveName());
+        }
+        if (packet instanceof ClientboundSetPlayerTeamPacket team) {
+            int action = getMethod(team);
+            if (action != TeamAction.UPDATE) {
+                players.set(team, onTeamPacket(action, team.getName(), team.getPlayers() == null ? Collections.emptyList() : team.getPlayers()));
+            }
+        }
+        return packet;
+    }
+
+    private int getMethod(@NonNull ClientboundSetPlayerTeamPacket team) {
+        if (team.getTeamAction() == ClientboundSetPlayerTeamPacket.Action.ADD) {
+            return 0;
+        } else if (team.getTeamAction() == ClientboundSetPlayerTeamPacket.Action.REMOVE) {
+            return 1;
+        } else if (team.getPlayerAction() == ClientboundSetPlayerTeamPacket.Action.ADD) {
+            return 3;
+        } else if (team.getPlayerAction() == ClientboundSetPlayerTeamPacket.Action.REMOVE) {
+            return 4;
+        } else {
+            return 2;
+        }
+    }
+
+    /**
+     * Sends the packet to the player.
+     *
+     * @param   packet
+     *          Packet to send
+     */
+    private void sendPacket(@NotNull Packet<?> packet) {
+        ((CraftPlayer)player.getPlayer()).getHandle().connection.send(packet);
+    }
+}

bukkit/paper_1_21_11/src/main/java/me/neznamy/tab/platforms/bukkit/paper_1_21_11/NMSPacketTabList.java

@@ -0,0 +1,204 @@
+package me.neznamy.tab.platforms.bukkit.paper_1_21_11;
+
+import com.google.common.collect.ImmutableMultimap;
+import com.mojang.authlib.GameProfile;
+import com.mojang.authlib.properties.Property;
+import com.mojang.authlib.properties.PropertyMap;
+import lombok.NonNull;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.chat.component.TabComponent;
+import me.neznamy.tab.shared.platform.decorators.TrackedTabList;
+import net.minecraft.network.chat.Component;
+import net.minecraft.network.protocol.Packet;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoRemovePacket;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoUpdatePacket;
+import net.minecraft.network.protocol.game.ClientboundTabListPacket;
+import net.minecraft.world.level.GameType;
+import org.bukkit.craftbukkit.entity.CraftPlayer;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.*;
+
+/**
+ * TabList implementation using direct mojang-mapped code.
+ */
+public class NMSPacketTabList extends TrackedTabList<BukkitTabPlayer> {
+
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> addPlayer = EnumSet.allOf(ClientboundPlayerInfoUpdatePacket.Action.class);
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> updateDisplayName = EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_DISPLAY_NAME);
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> updateLatency = EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_LATENCY);
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> updateGameMode = EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_GAME_MODE);
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> updateListed = EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_LISTED);
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> updateListOrder = EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_LIST_ORDER);
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> updateHat = EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_HAT);
+
+    /**
+     * Constructs new instance.
+     *
+     * @param   player
+     *          Player this tablist will belong to
+     */
+    public NMSPacketTabList(@NotNull BukkitTabPlayer player) {
+        super(player);
+    }
+
+    @Override
+    public void removeEntry(@NonNull UUID entry) {
+        sendPacket(new ClientboundPlayerInfoRemovePacket(Collections.singletonList(entry)));
+    }
+
+    @Override
+    public void updateDisplayName0(@NonNull UUID entry, @Nullable TabComponent displayName) {
+        sendPacket(updateDisplayName, entry, "", null, false, 0, 0, displayName, 0, false);
+    }
+
+    @Override
+    public void updateLatency(@NonNull UUID entry, int latency) {
+        sendPacket(updateLatency, entry, "", null, false, latency, 0, null, 0, false);
+    }
+
+    @Override
+    public void updateGameMode(@NonNull UUID entry, int gameMode) {
+        sendPacket(updateGameMode, entry, "", null, false, 0, gameMode, null, 0, false);
+    }
+
+    @Override
+    public void updateListed(@NonNull UUID entry, boolean listed) {
+        sendPacket(updateListed, entry, "", null, listed, 0, 0, null, 0, false);
+    }
+
+    @Override
+    public void updateListOrder(@NonNull UUID entry, int listOrder) {
+        sendPacket(updateListOrder, entry, "", null, false, 0, 0, null, listOrder, false);
+    }
+
+    @Override
+    public void updateHat(@NonNull UUID entry, boolean showHat) {
+        sendPacket(updateHat, entry, "", null, false, 0, 0, null, 0, showHat);
+    }
+
+    @Override
+    public void addEntry0(@NonNull Entry entry) {
+        sendPacket(addPlayer, entry.getUniqueId(), entry.getName(), entry.getSkin(), entry.isListed(), entry.getLatency(),
+                entry.getGameMode(), entry.getDisplayName(), entry.getListOrder(), entry.isShowHat());
+    }
+
+    @Override
+    public void setPlayerListHeaderFooter0(@NonNull TabComponent header, @NonNull TabComponent footer) {
+        sendPacket(new ClientboundTabListPacket(header.convert(), footer.convert()));
+    }
+
+    @Override
+    @Nullable
+    public Skin getSkin() {
+        Collection<Property> properties = ((CraftPlayer)player.getPlayer()).getProfile().properties().get(TEXTURES_PROPERTY);
+        if (properties.isEmpty()) return null; // Offline mode
+        Property property = properties.iterator().next();
+        return new Skin(property.value(), property.signature());
+    }
+
+    @Override
+    @NotNull
+    public Object onPacketSend(@NonNull Object packet) {
+        if (packet instanceof ClientboundTabListPacket tablist) {
+            if (header == null || footer == null) return packet;
+            if (tablist.header() != header.convert() || tablist.footer() != footer.convert()) {
+                return new ClientboundTabListPacket(header.convert(), footer.convert());
+            }
+        }
+        if (packet instanceof ClientboundPlayerInfoUpdatePacket info) {
+            EnumSet<ClientboundPlayerInfoUpdatePacket.Action> actions = info.actions();
+            List<ClientboundPlayerInfoUpdatePacket.Entry> updatedList = new ArrayList<>();
+            boolean rewritePacket = false;
+            for (ClientboundPlayerInfoUpdatePacket.Entry nmsData : info.entries()) {
+                boolean rewriteEntry = false;
+                Component displayName = nmsData.displayName();
+                int latency = nmsData.latency();
+                int gameMode = nmsData.gameMode().getId();
+                boolean listed = nmsData.listed();
+                if (actions.contains(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_DISPLAY_NAME)) {
+                    TabComponent forcedDisplayName = getForcedDisplayNames().get(nmsData.profileId());
+                    if (forcedDisplayName != null && forcedDisplayName.convert() != displayName) {
+                        displayName = forcedDisplayName.convert();
+                        rewriteEntry = rewritePacket = true;
+                    }
+                }
+                if (actions.contains(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_GAME_MODE)) {
+                    if (getBlockedSpectators().contains(nmsData.profileId()) && gameMode == 3) {
+                        gameMode = 0;
+                        rewriteEntry = rewritePacket = true;
+                    }
+                }
+                if (actions.contains(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_LATENCY)) {
+                    if (getForcedLatency() != null) {
+                        latency = getForcedLatency();
+                        rewriteEntry = rewritePacket = true;
+                    }
+                }
+                if (actions.contains(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_LISTED)) {
+                    if (allPlayersHidden && nmsData.profileId().getMostSignificantBits() != 0) { // Filter out layout entries
+                        listed = false;
+                        rewriteEntry = rewritePacket = true;
+                    }
+                }
+                if (actions.contains(ClientboundPlayerInfoUpdatePacket.Action.ADD_PLAYER)) {
+                    TAB.getInstance().getFeatureManager().onEntryAdd(player, nmsData.profileId(), nmsData.profile().name());
+                }
+                updatedList.add(rewriteEntry ? new ClientboundPlayerInfoUpdatePacket.Entry(
+                        nmsData.profileId(), nmsData.profile(), listed, latency, GameType.byId(gameMode), displayName,
+                        nmsData.showHat(), nmsData.listOrder(), nmsData.chatSession()
+                ) : nmsData);
+            }
+            if (rewritePacket) return new ClientboundPlayerInfoUpdatePacket(actions, updatedList);
+        }
+        return packet;
+    }
+
+    private void sendPacket(@NonNull EnumSet<ClientboundPlayerInfoUpdatePacket.Action> action, @NonNull UUID id, @NonNull String name, @Nullable Skin skin,
+                            boolean listed, int latency, int gameMode, @Nullable TabComponent displayName, int listOrder, boolean showHat) {
+        ClientboundPlayerInfoUpdatePacket packet = new ClientboundPlayerInfoUpdatePacket(action, new ClientboundPlayerInfoUpdatePacket.Entry(
+                id,
+                action.contains(ClientboundPlayerInfoUpdatePacket.Action.ADD_PLAYER) ? createProfile(id, name, skin) : null,
+                listed,
+                latency,
+                GameType.byId(gameMode),
+                displayName == null ? null : displayName.convert(),
+                showHat,
+                listOrder,
+                null
+        ));
+        sendPacket(packet);
+    }
+
+    /**
+     * Creates GameProfile from given parameters.
+     *
+     * @param   id
+     *          Profile ID
+     * @param   name
+     *          Profile name
+     * @param   skin
+     *          Player skin
+     * @return  GameProfile from given parameters
+     */
+    @NotNull
+    private GameProfile createProfile(@NonNull UUID id, @NonNull String name, @Nullable Skin skin) {
+        ImmutableMultimap.Builder<String, Property> builder = ImmutableMultimap.builder();
+        if (skin != null) {
+            builder.put(TEXTURES_PROPERTY, new Property(TEXTURES_PROPERTY, skin.getValue(), skin.getSignature()));
+        }
+        return new GameProfile(id, name, new PropertyMap(builder.build()));
+    }
+
+    /**
+     * Sends the packet to the player.
+     *
+     * @param   packet
+     *          Packet to send
+     */
+    private void sendPacket(@NotNull Packet<?> packet) {
+        ((CraftPlayer)player.getPlayer()).getHandle().connection.send(packet);
+    }
+}

bukkit/paper_1_21_11/src/main/java/me/neznamy/tab/platforms/bukkit/paper_1_21_11/NMSTabListEntryTracker.java

@@ -0,0 +1,30 @@
+package me.neznamy.tab.platforms.bukkit.paper_1_21_11;
+
+import me.neznamy.tab.shared.platform.TabListEntryTracker;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoRemovePacket;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoUpdatePacket;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.UUID;
+
+/**
+ * Implementation of TabListEntryTracker.
+ */
+public class NMSTabListEntryTracker extends TabListEntryTracker {
+
+    @Override
+    public void onPacketSend(@NotNull Object packet) {
+        if (packet instanceof ClientboundPlayerInfoRemovePacket remove) {
+            for (UUID id : remove.profileIds()) {
+                tablistEntries.remove(id);
+            }
+        }
+        if (packet instanceof ClientboundPlayerInfoUpdatePacket update) {
+            if (update.actions().contains(ClientboundPlayerInfoUpdatePacket.Action.ADD_PLAYER)) {
+                for (ClientboundPlayerInfoUpdatePacket.Entry nmsData : update.entries()) {
+                    tablistEntries.add(nmsData.profileId());
+                }
+            }
+        }
+    }
+}

bukkit/paper_1_21_2/build.gradle.kts

@@ -0,0 +1,28 @@
+plugins {
+    id("io.papermc.paperweight.userdev") version "2.0.0-beta.19"
+}
+
+repositories {
+    maven("https://jitpack.io") // YamlAssist
+    maven("https://repo.opencollab.dev/maven-snapshots/")
+    maven("https://repo.viaversion.com/")
+    maven {
+        name = "luck-repo"
+        url = uri("https://repo.lucko.me/")
+        content {
+            includeModule("me.lucko", "spark-api")
+        }
+    }
+}
+
+val version = "1.21.3-R0.1-SNAPSHOT" // 1.21.2 causes gradle error, but the versions are interchangeable
+
+dependencies {
+    implementation(projects.bukkit)
+    paperweight.paperDevBundle(version)
+    compileOnly("io.papermc.paper:paper-api:${version}")
+}
+
+tasks.compileJava {
+    options.release.set(21)
+}

bukkit/paper_1_21_2/src/main/java/me/neznamy/tab/platforms/bukkit/paper_1_21_2/NMSComponentConverter.java

@@ -0,0 +1,67 @@
+package me.neznamy.tab.platforms.bukkit.paper_1_21_2;
+
+import me.neznamy.tab.shared.chat.TabStyle;
+import me.neznamy.tab.shared.chat.component.object.TabAtlasSprite;
+import me.neznamy.tab.shared.chat.component.object.TabObjectComponent;
+import me.neznamy.tab.platforms.bukkit.provider.ComponentConverter;
+import me.neznamy.tab.shared.chat.component.object.TabPlayerSprite;
+import net.minecraft.network.chat.Component;
+import net.minecraft.network.chat.MutableComponent;
+import net.minecraft.network.chat.Style;
+import net.minecraft.network.chat.TextColor;
+import net.minecraft.resources.ResourceLocation;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Component converter using direct mojang-mapped code.
+ */
+public class NMSComponentConverter extends ComponentConverter<Component> {
+
+    @Override
+    @NotNull
+    public Component newTextComponent(@NotNull String text) {
+        return Component.literal(text);
+    }
+
+    @Override
+    @NotNull
+    public Component newTranslatableComponent(@NotNull String key) {
+        return Component.translatable(key);
+    }
+
+    @Override
+    @NotNull
+    public Component newKeybindComponent(@NotNull String keybind) {
+        return Component.keybind(keybind);
+    }
+
+    @Override
+    @NotNull
+    public Component newObjectComponent(@NotNull TabAtlasSprite sprite) {
+        return Component.literal(TabObjectComponent.ERROR_MESSAGE);
+    }
+
+    @Override
+    @NotNull
+    public Component newObjectComponent(@NotNull TabPlayerSprite sprite) {
+        return Component.literal(TabObjectComponent.ERROR_MESSAGE);
+    }
+
+    @Override
+    public void applyStyle(@NotNull Component nmsComponent, @NotNull TabStyle modifier) {
+        Style style = Style.EMPTY
+                .withColor(modifier.getColor() == null ? null : TextColor.fromRgb(modifier.getColor().getRgb()))
+                .withBold(modifier.getBold())
+                .withItalic(modifier.getItalic())
+                .withUnderlined(modifier.getUnderlined())
+                .withStrikethrough(modifier.getStrikethrough())
+                .withObfuscated(modifier.getObfuscated())
+                .withFont(modifier.getFont() == null ? null : ResourceLocation.tryParse(modifier.getFont()));
+        ((MutableComponent)nmsComponent).setStyle(style);
+    }
+
+    @Override
+    public void addSibling(@NotNull Component parent, @NotNull Component child) {
+        ((MutableComponent)parent).append(child);
+    }
+}

bukkit/paper_1_21_2/src/main/java/me/neznamy/tab/platforms/bukkit/paper_1_21_2/NMSImplementationProvider.java

@@ -0,0 +1,52 @@
+package me.neznamy.tab.platforms.bukkit.paper_1_21_2;
+
+import io.netty.channel.Channel;
+import lombok.Getter;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.platforms.bukkit.provider.ComponentConverter;
+import me.neznamy.tab.platforms.bukkit.provider.ImplementationProvider;
+import me.neznamy.tab.shared.platform.Scoreboard;
+import me.neznamy.tab.shared.platform.TabList;
+import me.neznamy.tab.shared.platform.TabListEntryTracker;
+import org.bukkit.craftbukkit.entity.CraftPlayer;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Implementation provider using direct Mojang-mapped NMS code for paper 1.21.2 - 1.21.3.
+ */
+@Getter
+public class NMSImplementationProvider implements ImplementationProvider {
+
+    @NotNull
+    private final ComponentConverter<?> componentConverter = new NMSComponentConverter();
+    
+    @Override
+    @NotNull
+    public Scoreboard newScoreboard(@NotNull BukkitTabPlayer player) {
+        return new NMSPacketScoreboard(player);
+    }
+
+    @Override
+    @NotNull
+    public TabList newTabList(@NotNull BukkitTabPlayer player) {
+        return new NMSPacketTabList(player);
+    }
+
+    @Override
+    @NotNull
+    public Channel getChannel(@NotNull Player player) {
+        return ((CraftPlayer)player).getHandle().connection.connection.channel;
+    }
+
+    @Override
+    @NotNull
+    public TabListEntryTracker newTabListEntryTracker() {
+        return new NMSTabListEntryTracker();
+    }
+
+    @Override
+    public int getPing(@NotNull BukkitTabPlayer player) {
+        return player.getPlayer().getPing();
+    }
+}

bukkit/paper_1_21_2/src/main/java/me/neznamy/tab/platforms/bukkit/paper_1_21_2/NMSPacketScoreboard.java

@@ -0,0 +1,176 @@
+package me.neznamy.tab.platforms.bukkit.paper_1_21_2;
+
+import lombok.NonNull;
+import lombok.SneakyThrows;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.platform.decorators.SafeScoreboard;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import net.minecraft.ChatFormatting;
+import net.minecraft.network.chat.numbers.FixedFormat;
+import net.minecraft.network.protocol.Packet;
+import net.minecraft.network.protocol.game.*;
+import net.minecraft.world.scores.PlayerTeam;
+import net.minecraft.world.scores.Scoreboard;
+import net.minecraft.world.scores.criteria.ObjectiveCriteria;
+import net.minecraft.world.scores.criteria.ObjectiveCriteria.RenderType;
+import org.bukkit.craftbukkit.entity.CraftPlayer;
+import org.jetbrains.annotations.NotNull;
+
+import java.lang.reflect.Field;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Optional;
+
+/**
+ * Scoreboard implementation using direct mojang-mapped code.
+ */
+public class NMSPacketScoreboard extends SafeScoreboard<BukkitTabPlayer> {
+
+    private static final ChatFormatting[] formats = ChatFormatting.values();
+    private static final net.minecraft.world.scores.Team.CollisionRule[] collisions = net.minecraft.world.scores.Team.CollisionRule.values();
+    private static final net.minecraft.world.scores.Team.Visibility[] visibilities = net.minecraft.world.scores.Team.Visibility.values();
+    private static final Scoreboard dummyScoreboard = new Scoreboard();
+    private static final Field players = ReflectionUtils.getOnlyField(ClientboundSetPlayerTeamPacket.class, Collection.class);
+
+    /**
+     * Constructs new instance with given player.
+     *
+     * @param   player
+     *          Player this scoreboard will belong to
+     */
+    public NMSPacketScoreboard(@NotNull BukkitTabPlayer player) {
+        super(player);
+    }
+
+    @Override
+    public void registerObjective(@NonNull Objective objective) {
+        net.minecraft.world.scores.Objective obj = new net.minecraft.world.scores.Objective(
+                dummyScoreboard,
+                objective.getName(),
+                ObjectiveCriteria.DUMMY,
+                objective.getTitle().convert(),
+                RenderType.values()[objective.getHealthDisplay().ordinal()],
+                false,
+                objective.getNumberFormat() == null ? null : objective.getNumberFormat().toFixedFormat(FixedFormat::new)
+        );
+        objective.setPlatformObjective(obj);
+        sendPacket(new ClientboundSetObjectivePacket(obj, ObjectiveAction.REGISTER));
+    }
+
+    @Override
+    public void setDisplaySlot(@NonNull Objective objective) {
+        sendPacket(new ClientboundSetDisplayObjectivePacket(
+                net.minecraft.world.scores.DisplaySlot.values()[objective.getDisplaySlot().ordinal()],
+                (net.minecraft.world.scores.Objective) objective.getPlatformObjective()
+        ));
+    }
+
+    @Override
+    public void unregisterObjective(@NonNull Objective objective) {
+        sendPacket(new ClientboundSetObjectivePacket((net.minecraft.world.scores.Objective) objective.getPlatformObjective(), ObjectiveAction.UNREGISTER));
+    }
+
+    @Override
+    public void updateObjective(@NonNull Objective objective) {
+        net.minecraft.world.scores.Objective obj = (net.minecraft.world.scores.Objective) objective.getPlatformObjective();
+        obj.setDisplayName(objective.getTitle().convert());
+        obj.setRenderType(RenderType.values()[objective.getHealthDisplay().ordinal()]);
+        sendPacket(new ClientboundSetObjectivePacket(obj, ObjectiveAction.UPDATE));
+    }
+
+    @Override
+    public void setScore(@NonNull Score score) {
+        sendPacket(new ClientboundSetScorePacket(
+                score.getHolder(),
+                score.getObjective().getName(),
+                score.getValue(),
+                Optional.ofNullable(score.getDisplayName() == null ? null : score.getDisplayName().convert()),
+                Optional.ofNullable(score.getNumberFormat() == null ? null : score.getNumberFormat().toFixedFormat(FixedFormat::new))
+        ));
+    }
+
+    @Override
+    public void removeScore(@NonNull Score score) {
+        sendPacket(new ClientboundResetScorePacket(score.getHolder(), score.getObjective().getName()));
+    }
+
+    @Override
+    @NotNull
+    public Object createTeam(@NonNull String name) {
+        return new PlayerTeam(dummyScoreboard, name);
+    }
+
+    @Override
+    public void registerTeam(@NonNull Team team) {
+        updateTeamProperties(team);
+        PlayerTeam t = (PlayerTeam) team.getPlatformTeam();
+        t.getPlayers().addAll(team.getPlayers());
+        sendPacket(ClientboundSetPlayerTeamPacket.createAddOrModifyPacket(t, true));
+    }
+
+    @Override
+    public void unregisterTeam(@NonNull Team team) {
+        sendPacket(ClientboundSetPlayerTeamPacket.createRemovePacket((PlayerTeam) team.getPlatformTeam()));
+    }
+
+    @Override
+    public void updateTeam(@NonNull Team team) {
+        updateTeamProperties(team);
+        sendPacket(ClientboundSetPlayerTeamPacket.createAddOrModifyPacket((PlayerTeam) team.getPlatformTeam(), false));
+    }
+
+    private void updateTeamProperties(@NonNull Team team) {
+        PlayerTeam t = (PlayerTeam) team.getPlatformTeam();
+        t.setAllowFriendlyFire((team.getOptions() & 0x01) != 0);
+        t.setSeeFriendlyInvisibles((team.getOptions() & 0x02) != 0);
+        t.setColor(formats[team.getColor().ordinal()]);
+        t.setCollisionRule(collisions[team.getCollision().ordinal()]);
+        t.setNameTagVisibility(visibilities[team.getVisibility().ordinal()]);
+        t.setPlayerPrefix(team.getPrefix().convert());
+        t.setPlayerSuffix(team.getSuffix().convert());
+    }
+
+    @Override
+    @SneakyThrows
+    @NotNull
+    public Object onPacketSend(@NonNull Object packet) {
+        if (packet instanceof ClientboundSetDisplayObjectivePacket display) {
+            TAB.getInstance().getFeatureManager().onDisplayObjective(player, display.getSlot().ordinal(), display.getObjectiveName());
+        }
+        if (packet instanceof ClientboundSetObjectivePacket objective) {
+            TAB.getInstance().getFeatureManager().onObjective(player, objective.getMethod(), objective.getObjectiveName());
+        }
+        if (packet instanceof ClientboundSetPlayerTeamPacket team) {
+            int action = getMethod(team);
+            if (action != TeamAction.UPDATE) {
+                players.set(team, onTeamPacket(action, team.getName(), team.getPlayers() == null ? Collections.emptyList() : team.getPlayers()));
+            }
+        }
+        return packet;
+    }
+
+    private static int getMethod(@NonNull ClientboundSetPlayerTeamPacket team) {
+        if (team.getTeamAction() == ClientboundSetPlayerTeamPacket.Action.ADD) {
+            return 0;
+        } else if (team.getTeamAction() == ClientboundSetPlayerTeamPacket.Action.REMOVE) {
+            return 1;
+        } else if (team.getPlayerAction() == ClientboundSetPlayerTeamPacket.Action.ADD) {
+            return 3;
+        } else if (team.getPlayerAction() == ClientboundSetPlayerTeamPacket.Action.REMOVE) {
+            return 4;
+        } else {
+            return 2;
+        }
+    }
+
+    /**
+     * Sends the packet to the player.
+     *
+     * @param   packet
+     *          Packet to send
+     */
+    private void sendPacket(@NotNull Packet<?> packet) {
+        ((CraftPlayer)player.getPlayer()).getHandle().connection.sendPacket(packet);
+    }
+}

bukkit/paper_1_21_2/src/main/java/me/neznamy/tab/platforms/bukkit/paper_1_21_2/NMSPacketTabList.java

@@ -0,0 +1,202 @@
+package me.neznamy.tab.platforms.bukkit.paper_1_21_2;
+
+import com.mojang.authlib.GameProfile;
+import com.mojang.authlib.properties.Property;
+import lombok.NonNull;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.chat.component.TabComponent;
+import me.neznamy.tab.shared.platform.TabList;
+import me.neznamy.tab.shared.platform.decorators.TrackedTabList;
+import net.minecraft.network.chat.Component;
+import net.minecraft.network.protocol.Packet;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoRemovePacket;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoUpdatePacket;
+import net.minecraft.network.protocol.game.ClientboundTabListPacket;
+import net.minecraft.world.level.GameType;
+import org.bukkit.craftbukkit.entity.CraftPlayer;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.*;
+
+/**
+ * TabList implementation using direct mojang-mapped code.
+ */
+public class NMSPacketTabList extends TrackedTabList<BukkitTabPlayer> {
+
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> addPlayer = EnumSet.allOf(ClientboundPlayerInfoUpdatePacket.Action.class);
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> updateDisplayName = EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_DISPLAY_NAME);
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> updateLatency = EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_LATENCY);
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> updateGameMode = EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_GAME_MODE);
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> updateListed = EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_LISTED);
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> updateListOrder = EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_LIST_ORDER);
+
+    /**
+     * Constructs new instance.
+     *
+     * @param   player
+     *          Player this tablist will belong to
+     */
+    public NMSPacketTabList(@NotNull BukkitTabPlayer player) {
+        super(player);
+    }
+
+    @Override
+    public void removeEntry(@NonNull UUID entry) {
+        sendPacket(new ClientboundPlayerInfoRemovePacket(Collections.singletonList(entry)));
+    }
+
+    @Override
+    public void updateDisplayName0(@NonNull UUID entry, @Nullable TabComponent displayName) {
+        sendPacket(updateDisplayName, entry, "", null, false, 0, 0, displayName, 0);
+    }
+
+    @Override
+    public void updateLatency(@NonNull UUID entry, int latency) {
+        sendPacket(updateLatency, entry, "", null, false, latency, 0, null, 0);
+    }
+
+    @Override
+    public void updateGameMode(@NonNull UUID entry, int gameMode) {
+        sendPacket(updateGameMode, entry, "", null, false, 0, gameMode, null, 0);
+    }
+
+    @Override
+    public void updateListed(@NonNull UUID entry, boolean listed) {
+        sendPacket(updateListed, entry, "", null, listed, 0, 0, null, 0);
+    }
+
+    @Override
+    public void updateListOrder(@NonNull UUID entry, int listOrder) {
+        sendPacket(updateListOrder, entry, "", null, false, 0, 0, null, listOrder);
+    }
+
+    @Override
+    public void updateHat(@NonNull UUID entry, boolean showHat) {
+        // Added in 1.21.4
+    }
+
+    @Override
+    public void addEntry0(@NonNull Entry entry) {
+        sendPacket(addPlayer, entry.getUniqueId(), entry.getName(), entry.getSkin(), entry.isListed(), entry.getLatency(),
+                entry.getGameMode(), entry.getDisplayName(), entry.getListOrder());
+    }
+
+    @Override
+    public void setPlayerListHeaderFooter0(@NonNull TabComponent header, @NonNull TabComponent footer) {
+        sendPacket(new ClientboundTabListPacket(header.convert(), footer.convert()));
+    }
+
+    @Override
+    @Nullable
+    public Skin getSkin() {
+        Collection<Property> properties = ((CraftPlayer)player.getPlayer()).getProfile().getProperties().get(TEXTURES_PROPERTY);
+        if (properties.isEmpty()) return null; // Offline mode
+        Property property = properties.iterator().next();
+        return new Skin(property.value(), property.signature());
+    }
+
+    @Override
+    @NotNull
+    public Object onPacketSend(@NonNull Object packet) {
+        if (packet instanceof ClientboundTabListPacket tablist) {
+            if (header == null || footer == null) return packet;
+            if (tablist.header() != header.convert() || tablist.footer() != footer.convert()) {
+                return new ClientboundTabListPacket(header.convert(), footer.convert());
+            }
+        }
+        if (packet instanceof ClientboundPlayerInfoUpdatePacket info) {
+            EnumSet<ClientboundPlayerInfoUpdatePacket.Action> actions = info.actions();
+            List<ClientboundPlayerInfoUpdatePacket.Entry> updatedList = new ArrayList<>();
+            boolean rewritePacket = false;
+            for (ClientboundPlayerInfoUpdatePacket.Entry nmsData : info.entries()) {
+                boolean rewriteEntry = false;
+                Component displayName = nmsData.displayName();
+                int latency = nmsData.latency();
+                int gameMode = nmsData.gameMode().getId();
+                boolean listed = nmsData.listed();
+                if (actions.contains(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_DISPLAY_NAME)) {
+                    TabComponent forcedDisplayName = getForcedDisplayNames().get(nmsData.profileId());
+                    if (forcedDisplayName != null && forcedDisplayName.convert() != displayName) {
+                        displayName = forcedDisplayName.convert();
+                        rewriteEntry = rewritePacket = true;
+                    }
+                }
+                if (actions.contains(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_GAME_MODE)) {
+                    if (getBlockedSpectators().contains(nmsData.profileId()) && gameMode == 3) {
+                        gameMode = 0;
+                        rewriteEntry = rewritePacket = true;
+                    }
+                }
+                if (actions.contains(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_LATENCY)) {
+                    if (getForcedLatency() != null) {
+                        latency = getForcedLatency();
+                        rewriteEntry = rewritePacket = true;
+                    }
+                }
+                if (actions.contains(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_LISTED)) {
+                    if (allPlayersHidden && nmsData.profileId().getMostSignificantBits() != 0) { // Filter out layout entries
+                        listed = false;
+                        rewriteEntry = rewritePacket = true;
+                    }
+                }
+                if (actions.contains(ClientboundPlayerInfoUpdatePacket.Action.ADD_PLAYER)) {
+                    TAB.getInstance().getFeatureManager().onEntryAdd(player, nmsData.profileId(), nmsData.profile().getName());
+                }
+                updatedList.add(rewriteEntry ? new ClientboundPlayerInfoUpdatePacket.Entry(
+                        nmsData.profileId(), nmsData.profile(), listed, latency, GameType.byId(gameMode), displayName,
+                        nmsData.listOrder(), nmsData.chatSession()
+                ) : nmsData);
+            }
+            if (rewritePacket) return new ClientboundPlayerInfoUpdatePacket(actions, updatedList);
+        }
+        return packet;
+    }
+
+    private void sendPacket(@NonNull EnumSet<ClientboundPlayerInfoUpdatePacket.Action> action, @NonNull UUID id, @NonNull String name, @Nullable Skin skin,
+                            boolean listed, int latency, int gameMode, @Nullable TabComponent displayName, int listOrder) {
+        ClientboundPlayerInfoUpdatePacket packet = new ClientboundPlayerInfoUpdatePacket(action, new ClientboundPlayerInfoUpdatePacket.Entry(
+                id,
+                action.contains(ClientboundPlayerInfoUpdatePacket.Action.ADD_PLAYER) ? createProfile(id, name, skin) : null,
+                listed,
+                latency,
+                GameType.byId(gameMode),
+                displayName == null ? null : displayName.convert(),
+                listOrder,
+                null
+        ));
+        sendPacket(packet);
+    }
+
+    /**
+     * Creates GameProfile from given parameters.
+     *
+     * @param   id
+     *          Profile ID
+     * @param   name
+     *          Profile name
+     * @param   skin
+     *          Player skin
+     * @return  GameProfile from given parameters
+     */
+    @NotNull
+    private GameProfile createProfile(@NonNull UUID id, @NonNull String name, @Nullable Skin skin) {
+        GameProfile profile = new GameProfile(id, name);
+        if (skin != null) {
+            profile.getProperties().put(TabList.TEXTURES_PROPERTY,
+                    new Property(TabList.TEXTURES_PROPERTY, skin.getValue(), skin.getSignature()));
+        }
+        return profile;
+    }
+
+    /**
+     * Sends the packet to the player.
+     *
+     * @param   packet
+     *          Packet to send
+     */
+    private void sendPacket(@NotNull Packet<?> packet) {
+        ((CraftPlayer)player.getPlayer()).getHandle().connection.send(packet);
+    }
+}

bukkit/paper_1_21_2/src/main/java/me/neznamy/tab/platforms/bukkit/paper_1_21_2/NMSTabListEntryTracker.java

@@ -0,0 +1,30 @@
+package me.neznamy.tab.platforms.bukkit.paper_1_21_2;
+
+import me.neznamy.tab.shared.platform.TabListEntryTracker;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoRemovePacket;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoUpdatePacket;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.UUID;
+
+/**
+ * Implementation of TabListEntryTracker.
+ */
+public class NMSTabListEntryTracker extends TabListEntryTracker {
+
+    @Override
+    public void onPacketSend(@NotNull Object packet) {
+        if (packet instanceof ClientboundPlayerInfoRemovePacket remove) {
+            for (UUID id : remove.profileIds()) {
+                tablistEntries.remove(id);
+            }
+        }
+        if (packet instanceof ClientboundPlayerInfoUpdatePacket update) {
+            if (update.actions().contains(ClientboundPlayerInfoUpdatePacket.Action.ADD_PLAYER)) {
+                for (ClientboundPlayerInfoUpdatePacket.Entry nmsData : update.entries()) {
+                    tablistEntries.add(nmsData.profileId());
+                }
+            }
+        }
+    }
+}

bukkit/paper_1_21_4/build.gradle.kts

@@ -0,0 +1,28 @@
+plugins {
+    id("io.papermc.paperweight.userdev") version "2.0.0-beta.19"
+}
+
+repositories {
+    maven("https://jitpack.io") // YamlAssist
+    maven("https://repo.opencollab.dev/maven-snapshots/")
+    maven("https://repo.viaversion.com/")
+    maven {
+        name = "luck-repo"
+        url = uri("https://repo.lucko.me/")
+        content {
+            includeModule("me.lucko", "spark-api")
+        }
+    }
+}
+
+val version = "1.21.4-R0.1-SNAPSHOT"
+
+dependencies {
+    implementation(projects.bukkit)
+    paperweight.paperDevBundle(version)
+    compileOnly("io.papermc.paper:paper-api:${version}")
+}
+
+tasks.compileJava {
+    options.release.set(21)
+}

bukkit/paper_1_21_4/src/main/java/me/neznamy/tab/platforms/bukkit/paper_1_21_4/NMSComponentConverter.java

@@ -0,0 +1,65 @@
+package me.neznamy.tab.platforms.bukkit.paper_1_21_4;
+
+import me.neznamy.tab.shared.chat.TabStyle;
+import me.neznamy.tab.shared.chat.component.object.TabAtlasSprite;
+import me.neznamy.tab.shared.chat.component.object.TabObjectComponent;
+import me.neznamy.tab.platforms.bukkit.provider.ComponentConverter;
+import me.neznamy.tab.shared.chat.component.object.TabPlayerSprite;
+import net.minecraft.network.chat.*;
+import net.minecraft.resources.ResourceLocation;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Component converter using direct mojang-mapped code.
+ */
+public class NMSComponentConverter extends ComponentConverter<Component> {
+
+    @Override
+    @NotNull
+    public Component newTextComponent(@NotNull String text) {
+        return Component.literal(text);
+    }
+
+    @Override
+    @NotNull
+    public Component newTranslatableComponent(@NotNull String key) {
+        return Component.translatable(key);
+    }
+
+    @Override
+    @NotNull
+    public Component newKeybindComponent(@NotNull String keybind) {
+        return Component.keybind(keybind);
+    }
+
+    @Override
+    @NotNull
+    public Component newObjectComponent(@NotNull TabAtlasSprite sprite) {
+        return Component.literal(TabObjectComponent.ERROR_MESSAGE);
+    }
+
+    @Override
+    @NotNull
+    public Component newObjectComponent(@NotNull TabPlayerSprite sprite) {
+        return Component.literal(TabObjectComponent.ERROR_MESSAGE);
+    }
+
+    @Override
+    public void applyStyle(@NotNull Component nmsComponent, @NotNull TabStyle modifier) {
+        Style style = Style.EMPTY
+                .withColor(modifier.getColor() == null ? null : TextColor.fromRgb(modifier.getColor().getRgb()))
+                .withBold(modifier.getBold())
+                .withItalic(modifier.getItalic())
+                .withUnderlined(modifier.getUnderlined())
+                .withStrikethrough(modifier.getStrikethrough())
+                .withObfuscated(modifier.getObfuscated())
+                .withFont(modifier.getFont() == null ? null : ResourceLocation.tryParse(modifier.getFont()));
+        if (modifier.getShadowColor() != null) style = style.withShadowColor(modifier.getShadowColor()); // withShadowColor takes int instead of Integer, bug?
+        ((MutableComponent)nmsComponent).setStyle(style);
+    }
+
+    @Override
+    public void addSibling(@NotNull Component parent, @NotNull Component child) {
+        ((MutableComponent)parent).append(child);
+    }
+}

bukkit/paper_1_21_4/src/main/java/me/neznamy/tab/platforms/bukkit/paper_1_21_4/NMSImplementationProvider.java

@@ -0,0 +1,52 @@
+package me.neznamy.tab.platforms.bukkit.paper_1_21_4;
+
+import io.netty.channel.Channel;
+import lombok.Getter;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.platforms.bukkit.provider.ComponentConverter;
+import me.neznamy.tab.platforms.bukkit.provider.ImplementationProvider;
+import me.neznamy.tab.shared.platform.Scoreboard;
+import me.neznamy.tab.shared.platform.TabList;
+import me.neznamy.tab.shared.platform.TabListEntryTracker;
+import org.bukkit.craftbukkit.entity.CraftPlayer;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Implementation provider using direct Mojang-mapped NMS code for paper 1.21.4 - 1.21.8.
+ */
+@Getter
+public class NMSImplementationProvider implements ImplementationProvider {
+
+    @NotNull
+    private final ComponentConverter<?> componentConverter = new NMSComponentConverter();
+    
+    @Override
+    @NotNull
+    public Scoreboard newScoreboard(@NotNull BukkitTabPlayer player) {
+        return new NMSPacketScoreboard(player);
+    }
+
+    @Override
+    @NotNull
+    public TabList newTabList(@NotNull BukkitTabPlayer player) {
+        return new NMSPacketTabList(player);
+    }
+
+    @Override
+    @NotNull
+    public Channel getChannel(@NotNull Player player) {
+        return ((CraftPlayer)player).getHandle().connection.connection.channel;
+    }
+
+    @Override
+    @NotNull
+    public TabListEntryTracker newTabListEntryTracker() {
+        return new NMSTabListEntryTracker();
+    }
+
+    @Override
+    public int getPing(@NotNull BukkitTabPlayer player) {
+        return player.getPlayer().getPing();
+    }
+}

bukkit/paper_1_21_4/src/main/java/me/neznamy/tab/platforms/bukkit/paper_1_21_4/NMSPacketScoreboard.java

@@ -0,0 +1,176 @@
+package me.neznamy.tab.platforms.bukkit.paper_1_21_4;
+
+import lombok.NonNull;
+import lombok.SneakyThrows;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.platform.decorators.SafeScoreboard;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import net.minecraft.ChatFormatting;
+import net.minecraft.network.chat.numbers.FixedFormat;
+import net.minecraft.network.protocol.Packet;
+import net.minecraft.network.protocol.game.*;
+import net.minecraft.world.scores.PlayerTeam;
+import net.minecraft.world.scores.Scoreboard;
+import net.minecraft.world.scores.criteria.ObjectiveCriteria;
+import net.minecraft.world.scores.criteria.ObjectiveCriteria.RenderType;
+import org.bukkit.craftbukkit.entity.CraftPlayer;
+import org.jetbrains.annotations.NotNull;
+
+import java.lang.reflect.Field;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Optional;
+
+/**
+ * Scoreboard implementation using direct mojang-mapped code.
+ */
+public class NMSPacketScoreboard extends SafeScoreboard<BukkitTabPlayer> {
+
+    private static final ChatFormatting[] formats = ChatFormatting.values();
+    private static final net.minecraft.world.scores.Team.CollisionRule[] collisions = net.minecraft.world.scores.Team.CollisionRule.values();
+    private static final net.minecraft.world.scores.Team.Visibility[] visibilities = net.minecraft.world.scores.Team.Visibility.values();
+    private static final Scoreboard dummyScoreboard = new Scoreboard();
+    private static final Field players = ReflectionUtils.getOnlyField(ClientboundSetPlayerTeamPacket.class, Collection.class);
+
+    /**
+     * Constructs new instance with given player.
+     *
+     * @param   player
+     *          Player this scoreboard will belong to
+     */
+    public NMSPacketScoreboard(@NotNull BukkitTabPlayer player) {
+        super(player);
+    }
+
+    @Override
+    public void registerObjective(@NonNull Objective objective) {
+        net.minecraft.world.scores.Objective obj = new net.minecraft.world.scores.Objective(
+                dummyScoreboard,
+                objective.getName(),
+                ObjectiveCriteria.DUMMY,
+                objective.getTitle().convert(),
+                RenderType.values()[objective.getHealthDisplay().ordinal()],
+                false,
+                objective.getNumberFormat() == null ? null : objective.getNumberFormat().toFixedFormat(FixedFormat::new)
+        );
+        objective.setPlatformObjective(obj);
+        sendPacket(new ClientboundSetObjectivePacket(obj, ObjectiveAction.REGISTER));
+    }
+
+    @Override
+    public void setDisplaySlot(@NonNull Objective objective) {
+        sendPacket(new ClientboundSetDisplayObjectivePacket(
+                net.minecraft.world.scores.DisplaySlot.values()[objective.getDisplaySlot().ordinal()],
+                (net.minecraft.world.scores.Objective) objective.getPlatformObjective()
+        ));
+    }
+
+    @Override
+    public void unregisterObjective(@NonNull Objective objective) {
+        sendPacket(new ClientboundSetObjectivePacket((net.minecraft.world.scores.Objective) objective.getPlatformObjective(), ObjectiveAction.UNREGISTER));
+    }
+
+    @Override
+    public void updateObjective(@NonNull Objective objective) {
+        net.minecraft.world.scores.Objective obj = (net.minecraft.world.scores.Objective) objective.getPlatformObjective();
+        obj.setDisplayName(objective.getTitle().convert());
+        obj.setRenderType(RenderType.values()[objective.getHealthDisplay().ordinal()]);
+        sendPacket(new ClientboundSetObjectivePacket(obj, ObjectiveAction.UPDATE));
+    }
+
+    @Override
+    public void setScore(@NonNull Score score) {
+        sendPacket(new ClientboundSetScorePacket(
+                score.getHolder(),
+                score.getObjective().getName(),
+                score.getValue(),
+                Optional.ofNullable(score.getDisplayName() == null ? null : score.getDisplayName().convert()),
+                Optional.ofNullable(score.getNumberFormat() == null ? null : score.getNumberFormat().toFixedFormat(FixedFormat::new))
+        ));
+    }
+
+    @Override
+    public void removeScore(@NonNull Score score) {
+        sendPacket(new ClientboundResetScorePacket(score.getHolder(), score.getObjective().getName()));
+    }
+
+    @Override
+    @NotNull
+    public Object createTeam(@NonNull String name) {
+        return new PlayerTeam(dummyScoreboard, name);
+    }
+
+    @Override
+    public void registerTeam(@NonNull Team team) {
+        updateTeamProperties(team);
+        PlayerTeam t = (PlayerTeam) team.getPlatformTeam();
+        t.getPlayers().addAll(team.getPlayers());
+        sendPacket(ClientboundSetPlayerTeamPacket.createAddOrModifyPacket(t, true));
+    }
+
+    @Override
+    public void unregisterTeam(@NonNull Team team) {
+        sendPacket(ClientboundSetPlayerTeamPacket.createRemovePacket((PlayerTeam) team.getPlatformTeam()));
+    }
+
+    @Override
+    public void updateTeam(@NonNull Team team) {
+        updateTeamProperties(team);
+        sendPacket(ClientboundSetPlayerTeamPacket.createAddOrModifyPacket((PlayerTeam) team.getPlatformTeam(), false));
+    }
+
+    private void updateTeamProperties(@NonNull Team team) {
+        PlayerTeam t = (PlayerTeam) team.getPlatformTeam();
+        t.setAllowFriendlyFire((team.getOptions() & 0x01) != 0);
+        t.setSeeFriendlyInvisibles((team.getOptions() & 0x02) != 0);
+        t.setColor(formats[team.getColor().ordinal()]);
+        t.setCollisionRule(collisions[team.getCollision().ordinal()]);
+        t.setNameTagVisibility(visibilities[team.getVisibility().ordinal()]);
+        t.setPlayerPrefix(team.getPrefix().convert());
+        t.setPlayerSuffix(team.getSuffix().convert());
+    }
+
+    @Override
+    @SneakyThrows
+    @NotNull
+    public Object onPacketSend(@NonNull Object packet) {
+        if (packet instanceof ClientboundSetDisplayObjectivePacket display) {
+            TAB.getInstance().getFeatureManager().onDisplayObjective(player, display.getSlot().ordinal(), display.getObjectiveName());
+        }
+        if (packet instanceof ClientboundSetObjectivePacket objective) {
+            TAB.getInstance().getFeatureManager().onObjective(player, objective.getMethod(), objective.getObjectiveName());
+        }
+        if (packet instanceof ClientboundSetPlayerTeamPacket team) {
+            int action = getMethod(team);
+            if (action != TeamAction.UPDATE) {
+                players.set(team, onTeamPacket(action, team.getName(), team.getPlayers() == null ? Collections.emptyList() : team.getPlayers()));
+            }
+        }
+        return packet;
+    }
+
+    private int getMethod(@NonNull ClientboundSetPlayerTeamPacket team) {
+        if (team.getTeamAction() == ClientboundSetPlayerTeamPacket.Action.ADD) {
+            return 0;
+        } else if (team.getTeamAction() == ClientboundSetPlayerTeamPacket.Action.REMOVE) {
+            return 1;
+        } else if (team.getPlayerAction() == ClientboundSetPlayerTeamPacket.Action.ADD) {
+            return 3;
+        } else if (team.getPlayerAction() == ClientboundSetPlayerTeamPacket.Action.REMOVE) {
+            return 4;
+        } else {
+            return 2;
+        }
+    }
+
+    /**
+     * Sends the packet to the player.
+     *
+     * @param   packet
+     *          Packet to send
+     */
+    private void sendPacket(@NotNull Packet<?> packet) {
+        ((CraftPlayer)player.getPlayer()).getHandle().connection.send(packet);
+    }
+}

bukkit/paper_1_21_4/src/main/java/me/neznamy/tab/platforms/bukkit/paper_1_21_4/NMSPacketTabList.java

@@ -0,0 +1,204 @@
+package me.neznamy.tab.platforms.bukkit.paper_1_21_4;
+
+import com.mojang.authlib.GameProfile;
+import com.mojang.authlib.properties.Property;
+import lombok.NonNull;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.chat.component.TabComponent;
+import me.neznamy.tab.shared.platform.TabList;
+import me.neznamy.tab.shared.platform.decorators.TrackedTabList;
+import net.minecraft.network.chat.Component;
+import net.minecraft.network.protocol.Packet;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoRemovePacket;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoUpdatePacket;
+import net.minecraft.network.protocol.game.ClientboundTabListPacket;
+import net.minecraft.world.level.GameType;
+import org.bukkit.craftbukkit.entity.CraftPlayer;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.*;
+
+/**
+ * TabList implementation using direct mojang-mapped code.
+ */
+public class NMSPacketTabList extends TrackedTabList<BukkitTabPlayer> {
+
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> addPlayer = EnumSet.allOf(ClientboundPlayerInfoUpdatePacket.Action.class);
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> updateDisplayName = EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_DISPLAY_NAME);
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> updateLatency = EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_LATENCY);
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> updateGameMode = EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_GAME_MODE);
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> updateListed = EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_LISTED);
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> updateListOrder = EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_LIST_ORDER);
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> updateHat = EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_HAT);
+
+    /**
+     * Constructs new instance.
+     *
+     * @param   player
+     *          Player this tablist will belong to
+     */
+    public NMSPacketTabList(@NotNull BukkitTabPlayer player) {
+        super(player);
+    }
+
+    @Override
+    public void removeEntry(@NonNull UUID entry) {
+        sendPacket(new ClientboundPlayerInfoRemovePacket(Collections.singletonList(entry)));
+    }
+
+    @Override
+    public void updateDisplayName0(@NonNull UUID entry, @Nullable TabComponent displayName) {
+        sendPacket(updateDisplayName, entry, "", null, false, 0, 0, displayName, 0, false);
+    }
+
+    @Override
+    public void updateLatency(@NonNull UUID entry, int latency) {
+        sendPacket(updateLatency, entry, "", null, false, latency, 0, null, 0, false);
+    }
+
+    @Override
+    public void updateGameMode(@NonNull UUID entry, int gameMode) {
+        sendPacket(updateGameMode, entry, "", null, false, 0, gameMode, null, 0, false);
+    }
+
+    @Override
+    public void updateListed(@NonNull UUID entry, boolean listed) {
+        sendPacket(updateListed, entry, "", null, listed, 0, 0, null, 0, false);
+    }
+
+    @Override
+    public void updateListOrder(@NonNull UUID entry, int listOrder) {
+        sendPacket(updateListOrder, entry, "", null, false, 0, 0, null, listOrder, false);
+    }
+
+    @Override
+    public void updateHat(@NonNull UUID entry, boolean showHat) {
+        sendPacket(updateHat, entry, "", null, false, 0, 0, null, 0, showHat);
+    }
+
+    @Override
+    public void addEntry0(@NonNull Entry entry) {
+        sendPacket(addPlayer, entry.getUniqueId(), entry.getName(), entry.getSkin(), entry.isListed(), entry.getLatency(),
+                entry.getGameMode(), entry.getDisplayName(), entry.getListOrder(), entry.isShowHat());
+    }
+
+    @Override
+    public void setPlayerListHeaderFooter0(@NonNull TabComponent header, @NonNull TabComponent footer) {
+        sendPacket(new ClientboundTabListPacket(header.convert(), footer.convert()));
+    }
+
+    @Override
+    @Nullable
+    public Skin getSkin() {
+        Collection<Property> properties = ((CraftPlayer)player.getPlayer()).getProfile().getProperties().get(TEXTURES_PROPERTY);
+        if (properties.isEmpty()) return null; // Offline mode
+        Property property = properties.iterator().next();
+        return new Skin(property.value(), property.signature());
+    }
+
+    @Override
+    @NotNull
+    public Object onPacketSend(@NonNull Object packet) {
+        if (packet instanceof ClientboundTabListPacket tablist) {
+            if (header == null || footer == null) return packet;
+            if (tablist.header() != header.convert() || tablist.footer() != footer.convert()) {
+                return new ClientboundTabListPacket(header.convert(), footer.convert());
+            }
+        }
+        if (packet instanceof ClientboundPlayerInfoUpdatePacket info) {
+            EnumSet<ClientboundPlayerInfoUpdatePacket.Action> actions = info.actions();
+            List<ClientboundPlayerInfoUpdatePacket.Entry> updatedList = new ArrayList<>();
+            boolean rewritePacket = false;
+            for (ClientboundPlayerInfoUpdatePacket.Entry nmsData : info.entries()) {
+                boolean rewriteEntry = false;
+                Component displayName = nmsData.displayName();
+                int latency = nmsData.latency();
+                int gameMode = nmsData.gameMode().getId();
+                boolean listed = nmsData.listed();
+                if (actions.contains(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_DISPLAY_NAME)) {
+                    TabComponent forcedDisplayName = getForcedDisplayNames().get(nmsData.profileId());
+                    if (forcedDisplayName != null && forcedDisplayName.convert() != displayName) {
+                        displayName = forcedDisplayName.convert();
+                        rewriteEntry = rewritePacket = true;
+                    }
+                }
+                if (actions.contains(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_GAME_MODE)) {
+                    if (getBlockedSpectators().contains(nmsData.profileId()) && gameMode == 3) {
+                        gameMode = 0;
+                        rewriteEntry = rewritePacket = true;
+                    }
+                }
+                if (actions.contains(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_LATENCY)) {
+                    if (getForcedLatency() != null) {
+                        latency = getForcedLatency();
+                        rewriteEntry = rewritePacket = true;
+                    }
+                }
+                if (actions.contains(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_LISTED)) {
+                    if (allPlayersHidden && nmsData.profileId().getMostSignificantBits() != 0) { // Filter out layout entries
+                        listed = false;
+                        rewriteEntry = rewritePacket = true;
+                    }
+                }
+                if (actions.contains(ClientboundPlayerInfoUpdatePacket.Action.ADD_PLAYER)) {
+                    TAB.getInstance().getFeatureManager().onEntryAdd(player, nmsData.profileId(), nmsData.profile().getName());
+                }
+                updatedList.add(rewriteEntry ? new ClientboundPlayerInfoUpdatePacket.Entry(
+                        nmsData.profileId(), nmsData.profile(), listed, latency, GameType.byId(gameMode), displayName,
+                        nmsData.showHat(), nmsData.listOrder(), nmsData.chatSession()
+                ) : nmsData);
+            }
+            if (rewritePacket) return new ClientboundPlayerInfoUpdatePacket(actions, updatedList);
+        }
+        return packet;
+    }
+
+    private void sendPacket(@NonNull EnumSet<ClientboundPlayerInfoUpdatePacket.Action> action, @NonNull UUID id, @NonNull String name, @Nullable Skin skin,
+                            boolean listed, int latency, int gameMode, @Nullable TabComponent displayName, int listOrder, boolean showHat) {
+        ClientboundPlayerInfoUpdatePacket packet = new ClientboundPlayerInfoUpdatePacket(action, new ClientboundPlayerInfoUpdatePacket.Entry(
+                id,
+                action.contains(ClientboundPlayerInfoUpdatePacket.Action.ADD_PLAYER) ? createProfile(id, name, skin) : null,
+                listed,
+                latency,
+                GameType.byId(gameMode),
+                displayName == null ? null : displayName.convert(),
+                showHat,
+                listOrder,
+                null
+        ));
+        sendPacket(packet);
+    }
+
+    /**
+     * Creates GameProfile from given parameters.
+     *
+     * @param   id
+     *          Profile ID
+     * @param   name
+     *          Profile name
+     * @param   skin
+     *          Player skin
+     * @return  GameProfile from given parameters
+     */
+    @NotNull
+    private GameProfile createProfile(@NonNull UUID id, @NonNull String name, @Nullable Skin skin) {
+        GameProfile profile = new GameProfile(id, name);
+        if (skin != null) {
+            profile.getProperties().put(TabList.TEXTURES_PROPERTY,
+                    new Property(TabList.TEXTURES_PROPERTY, skin.getValue(), skin.getSignature()));
+        }
+        return profile;
+    }
+
+    /**
+     * Sends the packet to the player.
+     *
+     * @param   packet
+     *          Packet to send
+     */
+    private void sendPacket(@NotNull Packet<?> packet) {
+        ((CraftPlayer)player.getPlayer()).getHandle().connection.send(packet);
+    }
+}

bukkit/paper_1_21_4/src/main/java/me/neznamy/tab/platforms/bukkit/paper_1_21_4/NMSTabListEntryTracker.java

@@ -0,0 +1,30 @@
+package me.neznamy.tab.platforms.bukkit.paper_1_21_4;
+
+import me.neznamy.tab.shared.platform.TabListEntryTracker;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoRemovePacket;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoUpdatePacket;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.UUID;
+
+/**
+ * Implementation of TabListEntryTracker.
+ */
+public class NMSTabListEntryTracker extends TabListEntryTracker {
+
+    @Override
+    public void onPacketSend(@NotNull Object packet) {
+        if (packet instanceof ClientboundPlayerInfoRemovePacket remove) {
+            for (UUID id : remove.profileIds()) {
+                tablistEntries.remove(id);
+            }
+        }
+        if (packet instanceof ClientboundPlayerInfoUpdatePacket update) {
+            if (update.actions().contains(ClientboundPlayerInfoUpdatePacket.Action.ADD_PLAYER)) {
+                for (ClientboundPlayerInfoUpdatePacket.Entry nmsData : update.entries()) {
+                    tablistEntries.add(nmsData.profileId());
+                }
+            }
+        }
+    }
+}

bukkit/paper_1_21_9/build.gradle.kts

@@ -0,0 +1,28 @@
+plugins {
+    id("io.papermc.paperweight.userdev") version "2.0.0-beta.19"
+}
+
+repositories {
+    maven("https://jitpack.io") // YamlAssist
+    maven("https://repo.opencollab.dev/maven-snapshots/")
+    maven("https://repo.viaversion.com/")
+    maven {
+        name = "luck-repo"
+        url = uri("https://repo.lucko.me/")
+        content {
+            includeModule("me.lucko", "spark-api")
+        }
+    }
+}
+
+val version = "1.21.9-R0.1-SNAPSHOT"
+
+dependencies {
+    implementation(projects.bukkit)
+    paperweight.paperDevBundle(version)
+    compileOnly("io.papermc.paper:paper-api:${version}")
+}
+
+tasks.compileJava {
+    options.release.set(21)
+}

bukkit/paper_1_21_9/src/main/java/me/neznamy/tab/platforms/bukkit/paper_1_21_9/NMSComponentConverter.java

@@ -0,0 +1,84 @@
+package me.neznamy.tab.platforms.bukkit.paper_1_21_9;
+
+import com.google.common.collect.ImmutableMultimap;
+import com.mojang.authlib.GameProfile;
+import com.mojang.authlib.properties.Property;
+import com.mojang.authlib.properties.PropertyMap;
+import me.neznamy.tab.platforms.bukkit.provider.ComponentConverter;
+import me.neznamy.tab.shared.chat.TabStyle;
+import me.neznamy.tab.shared.chat.component.object.TabAtlasSprite;
+import me.neznamy.tab.shared.chat.component.object.TabPlayerSprite;
+import me.neznamy.tab.shared.platform.TabList;
+import net.minecraft.network.chat.*;
+import net.minecraft.network.chat.contents.objects.AtlasSprite;
+import net.minecraft.network.chat.contents.objects.PlayerSprite;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.world.item.component.ResolvableProfile;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Component converter using direct mojang-mapped code.
+ */
+public class NMSComponentConverter extends ComponentConverter<Component> {
+
+    @Override
+    @NotNull
+    public Component newTextComponent(@NotNull String text) {
+        return Component.literal(text);
+    }
+
+    @Override
+    @NotNull
+    public Component newTranslatableComponent(@NotNull String key) {
+        return Component.translatable(key);
+    }
+
+    @Override
+    @NotNull
+    public Component newKeybindComponent(@NotNull String keybind) {
+        return Component.keybind(keybind);
+    }
+
+    @Override
+    @NotNull
+    public Component newObjectComponent(@NotNull TabAtlasSprite sprite) {
+        return Component.object(new AtlasSprite(ResourceLocation.parse(sprite.getAtlas()), ResourceLocation.parse(sprite.getSprite())));
+    }
+
+    @Override
+    @NotNull
+    public Component newObjectComponent(@NotNull TabPlayerSprite sprite) {
+        ResolvableProfile profile;
+        if (sprite.getId() != null) {
+            profile = ResolvableProfile.createUnresolved(sprite.getId());
+        } else if (sprite.getName() != null) {
+            profile = ResolvableProfile.createUnresolved(sprite.getName());
+        } else if (sprite.getSkin() != null) {
+            ImmutableMultimap.Builder<String, Property> builder = ImmutableMultimap.builder();
+            builder.put(TabList.TEXTURES_PROPERTY, new Property(TabList.TEXTURES_PROPERTY, sprite.getSkin().getValue(), sprite.getSkin().getSignature()));
+            profile = ResolvableProfile.createResolved(new GameProfile(NIL_UUID, "", new PropertyMap(builder.build())));
+        } else {
+            throw new IllegalStateException("Player head component does not have id, name or skin set");
+        }
+        return Component.object(new PlayerSprite(profile, sprite.isShowHat()));
+    }
+
+    @Override
+    public void applyStyle(@NotNull Component nmsComponent, @NotNull TabStyle modifier) {
+        Style style = Style.EMPTY
+                .withColor(modifier.getColor() == null ? null : TextColor.fromRgb(modifier.getColor().getRgb()))
+                .withBold(modifier.getBold())
+                .withItalic(modifier.getItalic())
+                .withUnderlined(modifier.getUnderlined())
+                .withStrikethrough(modifier.getStrikethrough())
+                .withObfuscated(modifier.getObfuscated())
+                .withFont(modifier.getFont() == null ? null : new FontDescription.Resource(ResourceLocation.parse(modifier.getFont())));
+        if (modifier.getShadowColor() != null) style = style.withShadowColor(modifier.getShadowColor()); // withShadowColor takes int instead of Integer, bug?
+        ((MutableComponent)nmsComponent).setStyle(style);
+    }
+
+    @Override
+    public void addSibling(@NotNull Component parent, @NotNull Component child) {
+        ((MutableComponent)parent).append(child);
+    }
+}

bukkit/paper_1_21_9/src/main/java/me/neznamy/tab/platforms/bukkit/paper_1_21_9/NMSImplementationProvider.java

@@ -0,0 +1,52 @@
+package me.neznamy.tab.platforms.bukkit.paper_1_21_9;
+
+import io.netty.channel.Channel;
+import lombok.Getter;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.platforms.bukkit.provider.ComponentConverter;
+import me.neznamy.tab.platforms.bukkit.provider.ImplementationProvider;
+import me.neznamy.tab.shared.platform.Scoreboard;
+import me.neznamy.tab.shared.platform.TabList;
+import me.neznamy.tab.shared.platform.TabListEntryTracker;
+import org.bukkit.craftbukkit.entity.CraftPlayer;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Implementation provider using direct Mojang-mapped NMS code for paper 1.21.9 - 1.21.10.
+ */
+@Getter
+public class NMSImplementationProvider implements ImplementationProvider {
+
+    @NotNull
+    private final ComponentConverter<?> componentConverter = new NMSComponentConverter();
+    
+    @Override
+    @NotNull
+    public Scoreboard newScoreboard(@NotNull BukkitTabPlayer player) {
+        return new NMSPacketScoreboard(player);
+    }
+
+    @Override
+    @NotNull
+    public TabList newTabList(@NotNull BukkitTabPlayer player) {
+        return new NMSPacketTabList(player);
+    }
+
+    @Override
+    @NotNull
+    public Channel getChannel(@NotNull Player player) {
+        return ((CraftPlayer)player).getHandle().connection.connection.channel;
+    }
+
+    @Override
+    @NotNull
+    public TabListEntryTracker newTabListEntryTracker() {
+        return new NMSTabListEntryTracker();
+    }
+
+    @Override
+    public int getPing(@NotNull BukkitTabPlayer player) {
+        return player.getPlayer().getPing();
+    }
+}

bukkit/paper_1_21_9/src/main/java/me/neznamy/tab/platforms/bukkit/paper_1_21_9/NMSPacketScoreboard.java

@@ -0,0 +1,176 @@
+package me.neznamy.tab.platforms.bukkit.paper_1_21_9;
+
+import lombok.NonNull;
+import lombok.SneakyThrows;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.platform.decorators.SafeScoreboard;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import net.minecraft.ChatFormatting;
+import net.minecraft.network.chat.numbers.FixedFormat;
+import net.minecraft.network.protocol.Packet;
+import net.minecraft.network.protocol.game.*;
+import net.minecraft.world.scores.PlayerTeam;
+import net.minecraft.world.scores.Scoreboard;
+import net.minecraft.world.scores.criteria.ObjectiveCriteria;
+import net.minecraft.world.scores.criteria.ObjectiveCriteria.RenderType;
+import org.bukkit.craftbukkit.entity.CraftPlayer;
+import org.jetbrains.annotations.NotNull;
+
+import java.lang.reflect.Field;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Optional;
+
+/**
+ * Scoreboard implementation using direct mojang-mapped code.
+ */
+public class NMSPacketScoreboard extends SafeScoreboard<BukkitTabPlayer> {
+
+    private static final ChatFormatting[] formats = ChatFormatting.values();
+    private static final net.minecraft.world.scores.Team.CollisionRule[] collisions = net.minecraft.world.scores.Team.CollisionRule.values();
+    private static final net.minecraft.world.scores.Team.Visibility[] visibilities = net.minecraft.world.scores.Team.Visibility.values();
+    private static final Scoreboard dummyScoreboard = new Scoreboard();
+    private static final Field players = ReflectionUtils.getOnlyField(ClientboundSetPlayerTeamPacket.class, Collection.class);
+
+    /**
+     * Constructs new instance with given player.
+     *
+     * @param   player
+     *          Player this scoreboard will belong to
+     */
+    public NMSPacketScoreboard(@NotNull BukkitTabPlayer player) {
+        super(player);
+    }
+
+    @Override
+    public void registerObjective(@NonNull Objective objective) {
+        net.minecraft.world.scores.Objective obj = new net.minecraft.world.scores.Objective(
+                dummyScoreboard,
+                objective.getName(),
+                ObjectiveCriteria.DUMMY,
+                objective.getTitle().convert(),
+                RenderType.values()[objective.getHealthDisplay().ordinal()],
+                false,
+                objective.getNumberFormat() == null ? null : objective.getNumberFormat().toFixedFormat(FixedFormat::new)
+        );
+        objective.setPlatformObjective(obj);
+        sendPacket(new ClientboundSetObjectivePacket(obj, ObjectiveAction.REGISTER));
+    }
+
+    @Override
+    public void setDisplaySlot(@NonNull Objective objective) {
+        sendPacket(new ClientboundSetDisplayObjectivePacket(
+                net.minecraft.world.scores.DisplaySlot.values()[objective.getDisplaySlot().ordinal()],
+                (net.minecraft.world.scores.Objective) objective.getPlatformObjective()
+        ));
+    }
+
+    @Override
+    public void unregisterObjective(@NonNull Objective objective) {
+        sendPacket(new ClientboundSetObjectivePacket((net.minecraft.world.scores.Objective) objective.getPlatformObjective(), ObjectiveAction.UNREGISTER));
+    }
+
+    @Override
+    public void updateObjective(@NonNull Objective objective) {
+        net.minecraft.world.scores.Objective obj = (net.minecraft.world.scores.Objective) objective.getPlatformObjective();
+        obj.setDisplayName(objective.getTitle().convert());
+        obj.setRenderType(RenderType.values()[objective.getHealthDisplay().ordinal()]);
+        sendPacket(new ClientboundSetObjectivePacket(obj, ObjectiveAction.UPDATE));
+    }
+
+    @Override
+    public void setScore(@NonNull Score score) {
+        sendPacket(new ClientboundSetScorePacket(
+                score.getHolder(),
+                score.getObjective().getName(),
+                score.getValue(),
+                Optional.ofNullable(score.getDisplayName() == null ? null : score.getDisplayName().convert()),
+                Optional.ofNullable(score.getNumberFormat() == null ? null : score.getNumberFormat().toFixedFormat(FixedFormat::new))
+        ));
+    }
+
+    @Override
+    public void removeScore(@NonNull Score score) {
+        sendPacket(new ClientboundResetScorePacket(score.getHolder(), score.getObjective().getName()));
+    }
+
+    @Override
+    @NotNull
+    public Object createTeam(@NonNull String name) {
+        return new PlayerTeam(dummyScoreboard, name);
+    }
+
+    @Override
+    public void registerTeam(@NonNull Team team) {
+        updateTeamProperties(team);
+        PlayerTeam t = (PlayerTeam) team.getPlatformTeam();
+        t.getPlayers().addAll(team.getPlayers());
+        sendPacket(ClientboundSetPlayerTeamPacket.createAddOrModifyPacket(t, true));
+    }
+
+    @Override
+    public void unregisterTeam(@NonNull Team team) {
+        sendPacket(ClientboundSetPlayerTeamPacket.createRemovePacket((PlayerTeam) team.getPlatformTeam()));
+    }
+
+    @Override
+    public void updateTeam(@NonNull Team team) {
+        updateTeamProperties(team);
+        sendPacket(ClientboundSetPlayerTeamPacket.createAddOrModifyPacket((PlayerTeam) team.getPlatformTeam(), false));
+    }
+
+    private void updateTeamProperties(@NonNull Team team) {
+        PlayerTeam t = (PlayerTeam) team.getPlatformTeam();
+        t.setAllowFriendlyFire((team.getOptions() & 0x01) != 0);
+        t.setSeeFriendlyInvisibles((team.getOptions() & 0x02) != 0);
+        t.setColor(formats[team.getColor().ordinal()]);
+        t.setCollisionRule(collisions[team.getCollision().ordinal()]);
+        t.setNameTagVisibility(visibilities[team.getVisibility().ordinal()]);
+        t.setPlayerPrefix(team.getPrefix().convert());
+        t.setPlayerSuffix(team.getSuffix().convert());
+    }
+
+    @Override
+    @SneakyThrows
+    @NotNull
+    public Object onPacketSend(@NonNull Object packet) {
+        if (packet instanceof ClientboundSetDisplayObjectivePacket display) {
+            TAB.getInstance().getFeatureManager().onDisplayObjective(player, display.getSlot().ordinal(), display.getObjectiveName());
+        }
+        if (packet instanceof ClientboundSetObjectivePacket objective) {
+            TAB.getInstance().getFeatureManager().onObjective(player, objective.getMethod(), objective.getObjectiveName());
+        }
+        if (packet instanceof ClientboundSetPlayerTeamPacket team) {
+            int action = getMethod(team);
+            if (action != TeamAction.UPDATE) {
+                players.set(team, onTeamPacket(action, team.getName(), team.getPlayers() == null ? Collections.emptyList() : team.getPlayers()));
+            }
+        }
+        return packet;
+    }
+
+    private int getMethod(@NonNull ClientboundSetPlayerTeamPacket team) {
+        if (team.getTeamAction() == ClientboundSetPlayerTeamPacket.Action.ADD) {
+            return 0;
+        } else if (team.getTeamAction() == ClientboundSetPlayerTeamPacket.Action.REMOVE) {
+            return 1;
+        } else if (team.getPlayerAction() == ClientboundSetPlayerTeamPacket.Action.ADD) {
+            return 3;
+        } else if (team.getPlayerAction() == ClientboundSetPlayerTeamPacket.Action.REMOVE) {
+            return 4;
+        } else {
+            return 2;
+        }
+    }
+
+    /**
+     * Sends the packet to the player.
+     *
+     * @param   packet
+     *          Packet to send
+     */
+    private void sendPacket(@NotNull Packet<?> packet) {
+        ((CraftPlayer)player.getPlayer()).getHandle().connection.send(packet);
+    }
+}

bukkit/paper_1_21_9/src/main/java/me/neznamy/tab/platforms/bukkit/paper_1_21_9/NMSPacketTabList.java

@@ -0,0 +1,206 @@
+package me.neznamy.tab.platforms.bukkit.paper_1_21_9;
+
+import com.google.common.collect.ImmutableMultimap;
+import com.mojang.authlib.GameProfile;
+import com.mojang.authlib.properties.Property;
+import com.mojang.authlib.properties.PropertyMap;
+import lombok.NonNull;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.chat.component.TabComponent;
+import me.neznamy.tab.shared.platform.TabList;
+import me.neznamy.tab.shared.platform.decorators.TrackedTabList;
+import net.minecraft.network.chat.Component;
+import net.minecraft.network.protocol.Packet;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoRemovePacket;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoUpdatePacket;
+import net.minecraft.network.protocol.game.ClientboundTabListPacket;
+import net.minecraft.world.level.GameType;
+import org.bukkit.craftbukkit.entity.CraftPlayer;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.*;
+
+/**
+ * TabList implementation using direct mojang-mapped code.
+ */
+public class NMSPacketTabList extends TrackedTabList<BukkitTabPlayer> {
+
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> addPlayer = EnumSet.allOf(ClientboundPlayerInfoUpdatePacket.Action.class);
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> updateDisplayName = EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_DISPLAY_NAME);
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> updateLatency = EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_LATENCY);
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> updateGameMode = EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_GAME_MODE);
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> updateListed = EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_LISTED);
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> updateListOrder = EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_LIST_ORDER);
+    private static final EnumSet<ClientboundPlayerInfoUpdatePacket.Action> updateHat = EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_HAT);
+
+    /**
+     * Constructs new instance.
+     *
+     * @param   player
+     *          Player this tablist will belong to
+     */
+    public NMSPacketTabList(@NotNull BukkitTabPlayer player) {
+        super(player);
+    }
+
+    @Override
+    public void removeEntry(@NonNull UUID entry) {
+        sendPacket(new ClientboundPlayerInfoRemovePacket(Collections.singletonList(entry)));
+    }
+
+    @Override
+    public void updateDisplayName0(@NonNull UUID entry, @Nullable TabComponent displayName) {
+        sendPacket(updateDisplayName, entry, "", null, false, 0, 0, displayName, 0, false);
+    }
+
+    @Override
+    public void updateLatency(@NonNull UUID entry, int latency) {
+        sendPacket(updateLatency, entry, "", null, false, latency, 0, null, 0, false);
+    }
+
+    @Override
+    public void updateGameMode(@NonNull UUID entry, int gameMode) {
+        sendPacket(updateGameMode, entry, "", null, false, 0, gameMode, null, 0, false);
+    }
+
+    @Override
+    public void updateListed(@NonNull UUID entry, boolean listed) {
+        sendPacket(updateListed, entry, "", null, listed, 0, 0, null, 0, false);
+    }
+
+    @Override
+    public void updateListOrder(@NonNull UUID entry, int listOrder) {
+        sendPacket(updateListOrder, entry, "", null, false, 0, 0, null, listOrder, false);
+    }
+
+    @Override
+    public void updateHat(@NonNull UUID entry, boolean showHat) {
+        sendPacket(updateHat, entry, "", null, false, 0, 0, null, 0, showHat);
+    }
+
+    @Override
+    public void addEntry0(@NonNull Entry entry) {
+        sendPacket(addPlayer, entry.getUniqueId(), entry.getName(), entry.getSkin(), entry.isListed(), entry.getLatency(),
+                entry.getGameMode(), entry.getDisplayName(), entry.getListOrder(), entry.isShowHat());
+    }
+
+    @Override
+    public void setPlayerListHeaderFooter0(@NonNull TabComponent header, @NonNull TabComponent footer) {
+        sendPacket(new ClientboundTabListPacket(header.convert(), footer.convert()));
+    }
+
+    @Override
+    @Nullable
+    public Skin getSkin() {
+        Collection<Property> properties = ((CraftPlayer)player.getPlayer()).getProfile().properties().get(TEXTURES_PROPERTY);
+        if (properties.isEmpty()) return null; // Offline mode
+        Property property = properties.iterator().next();
+        return new Skin(property.value(), property.signature());
+    }
+
+    @Override
+    @NotNull
+    public Object onPacketSend(@NonNull Object packet) {
+        if (packet instanceof ClientboundTabListPacket tablist) {
+            if (header == null || footer == null) return packet;
+            if (tablist.header() != header.convert() || tablist.footer() != footer.convert()) {
+                return new ClientboundTabListPacket(header.convert(), footer.convert());
+            }
+        }
+        if (packet instanceof ClientboundPlayerInfoUpdatePacket info) {
+            EnumSet<ClientboundPlayerInfoUpdatePacket.Action> actions = info.actions();
+            List<ClientboundPlayerInfoUpdatePacket.Entry> updatedList = new ArrayList<>();
+            boolean rewritePacket = false;
+            for (ClientboundPlayerInfoUpdatePacket.Entry nmsData : info.entries()) {
+                boolean rewriteEntry = false;
+                Component displayName = nmsData.displayName();
+                int latency = nmsData.latency();
+                int gameMode = nmsData.gameMode().getId();
+                boolean listed = nmsData.listed();
+                if (actions.contains(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_DISPLAY_NAME)) {
+                    TabComponent forcedDisplayName = getForcedDisplayNames().get(nmsData.profileId());
+                    if (forcedDisplayName != null && forcedDisplayName.convert() != displayName) {
+                        displayName = forcedDisplayName.convert();
+                        rewriteEntry = rewritePacket = true;
+                    }
+                }
+                if (actions.contains(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_GAME_MODE)) {
+                    if (getBlockedSpectators().contains(nmsData.profileId()) && gameMode == 3) {
+                        gameMode = 0;
+                        rewriteEntry = rewritePacket = true;
+                    }
+                }
+                if (actions.contains(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_LATENCY)) {
+                    if (getForcedLatency() != null) {
+                        latency = getForcedLatency();
+                        rewriteEntry = rewritePacket = true;
+                    }
+                }
+                if (actions.contains(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_LISTED)) {
+                    if (allPlayersHidden && nmsData.profileId().getMostSignificantBits() != 0) { // Filter out layout entries
+                        listed = false;
+                        rewriteEntry = rewritePacket = true;
+                    }
+                }
+                if (actions.contains(ClientboundPlayerInfoUpdatePacket.Action.ADD_PLAYER)) {
+                    TAB.getInstance().getFeatureManager().onEntryAdd(player, nmsData.profileId(), nmsData.profile().name());
+                }
+                updatedList.add(rewriteEntry ? new ClientboundPlayerInfoUpdatePacket.Entry(
+                        nmsData.profileId(), nmsData.profile(), listed, latency, GameType.byId(gameMode), displayName,
+                        nmsData.showHat(), nmsData.listOrder(), nmsData.chatSession()
+                ) : nmsData);
+            }
+            if (rewritePacket) return new ClientboundPlayerInfoUpdatePacket(actions, updatedList);
+        }
+        return packet;
+    }
+
+    private void sendPacket(@NonNull EnumSet<ClientboundPlayerInfoUpdatePacket.Action> action, @NonNull UUID id, @NonNull String name, @Nullable Skin skin,
+                            boolean listed, int latency, int gameMode, @Nullable TabComponent displayName, int listOrder, boolean showHat) {
+        ClientboundPlayerInfoUpdatePacket packet = new ClientboundPlayerInfoUpdatePacket(action, new ClientboundPlayerInfoUpdatePacket.Entry(
+                id,
+                action.contains(ClientboundPlayerInfoUpdatePacket.Action.ADD_PLAYER) ? createProfile(id, name, skin) : null,
+                listed,
+                latency,
+                GameType.byId(gameMode),
+                displayName == null ? null : displayName.convert(),
+                showHat,
+                listOrder,
+                null
+        ));
+        sendPacket(packet);
+    }
+
+    /**
+     * Creates GameProfile from given parameters.
+     *
+     * @param   id
+     *          Profile ID
+     * @param   name
+     *          Profile name
+     * @param   skin
+     *          Player skin
+     * @return  GameProfile from given parameters
+     */
+    @NotNull
+    private GameProfile createProfile(@NonNull UUID id, @NonNull String name, @Nullable Skin skin) {
+        ImmutableMultimap.Builder<String, Property> builder = ImmutableMultimap.builder();
+        if (skin != null) {
+            builder.put(TabList.TEXTURES_PROPERTY,
+                    new Property(TabList.TEXTURES_PROPERTY, skin.getValue(), skin.getSignature()));
+        }
+        return new GameProfile(id, name, new PropertyMap(builder.build()));
+    }
+
+    /**
+     * Sends the packet to the player.
+     *
+     * @param   packet
+     *          Packet to send
+     */
+    private void sendPacket(@NotNull Packet<?> packet) {
+        ((CraftPlayer)player.getPlayer()).getHandle().connection.send(packet);
+    }
+}

bukkit/paper_1_21_9/src/main/java/me/neznamy/tab/platforms/bukkit/paper_1_21_9/NMSTabListEntryTracker.java

@@ -0,0 +1,30 @@
+package me.neznamy.tab.platforms.bukkit.paper_1_21_9;
+
+import me.neznamy.tab.shared.platform.TabListEntryTracker;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoRemovePacket;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoUpdatePacket;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.UUID;
+
+/**
+ * Implementation of TabListEntryTracker.
+ */
+public class NMSTabListEntryTracker extends TabListEntryTracker {
+
+    @Override
+    public void onPacketSend(@NotNull Object packet) {
+        if (packet instanceof ClientboundPlayerInfoRemovePacket remove) {
+            for (UUID id : remove.profileIds()) {
+                tablistEntries.remove(id);
+            }
+        }
+        if (packet instanceof ClientboundPlayerInfoUpdatePacket update) {
+            if (update.actions().contains(ClientboundPlayerInfoUpdatePacket.Action.ADD_PLAYER)) {
+                for (ClientboundPlayerInfoUpdatePacket.Entry nmsData : update.entries()) {
+                    tablistEntries.add(nmsData.profileId());
+                }
+            }
+        }
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/BukkitEventListener.java

@@ -0,0 +1,69 @@
+package me.neznamy.tab.platforms.bukkit;
+
+import lombok.RequiredArgsConstructor;
+import me.neznamy.tab.platforms.bukkit.platform.BukkitPlatform;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.platform.EventListener;
+import me.neznamy.tab.shared.platform.TabPlayer;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerChangedWorldEvent;
+import org.bukkit.event.player.PlayerJoinEvent;
+import org.bukkit.event.player.PlayerQuitEvent;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * The core for bukkit forwarding events into all enabled features
+ */
+@RequiredArgsConstructor
+public class BukkitEventListener implements EventListener<Player>, Listener {
+
+    /** Platform reference */
+    private final BukkitPlatform platform;
+
+    /**
+     * Listens to player quit event.
+     *
+     * @param   e
+     *          Disconnect event
+     */
+    @EventHandler(priority = EventPriority.HIGHEST)
+    public void onQuit(PlayerQuitEvent e) {
+        quit(e.getPlayer().getUniqueId());
+    }
+
+    /**
+     * Listens to player join event.
+     *
+     * @param   e
+     *          Join event
+     */
+    @EventHandler(priority = EventPriority.LOW)
+    public void onJoin(PlayerJoinEvent e) {
+        TAB.getInstance().addTablistTracker(
+                e.getPlayer().getUniqueId(),
+                platform.getImplementationProvider().getChannel(e.getPlayer()),
+                platform.getImplementationProvider().newTabListEntryTracker()
+        );
+        join(e.getPlayer());
+    }
+
+    /**
+     * Listens to world change event.
+     *
+     * @param   e
+     *          World change event
+     */
+    @EventHandler(priority = EventPriority.LOWEST)
+    public void onWorldChange(PlayerChangedWorldEvent e) {
+        worldChange(e.getPlayer().getUniqueId(), e.getPlayer().getWorld().getName());
+    }
+
+    @Override
+    @NotNull
+    public TabPlayer createPlayer(@NotNull Player player) {
+        return new BukkitTabPlayer(platform, player);
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/BukkitPipelineInjector.java

@@ -0,0 +1,26 @@
+package me.neznamy.tab.platforms.bukkit;
+
+import io.netty.channel.Channel;
+import me.neznamy.tab.platforms.bukkit.platform.BukkitPlatform;
+import me.neznamy.tab.shared.features.injection.NettyPipelineInjector;
+import me.neznamy.tab.shared.platform.TabPlayer;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Pipeline injection for Bukkit 1.8+.
+ */
+public class BukkitPipelineInjector extends NettyPipelineInjector {
+
+    /**
+     * Constructs new instance
+     */
+    public BukkitPipelineInjector() {
+        super("packet_handler");
+    }
+
+    @Override
+    @NotNull
+    protected Channel getChannel(@NotNull TabPlayer player) {
+        return ((BukkitPlatform)player.getPlatform()).getImplementationProvider().getChannel(((BukkitTabPlayer) player).getPlayer());
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/BukkitTAB.java

@@ -0,0 +1,36 @@
+package me.neznamy.tab.platforms.bukkit;
+
+import me.neznamy.tab.platforms.bukkit.platform.BukkitPlatform;
+import me.neznamy.tab.platforms.bukkit.platform.FoliaPlatform;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import org.bukkit.Bukkit;
+import org.bukkit.plugin.java.JavaPlugin;
+
+/**
+ * Main class for Bukkit.
+ */
+public class BukkitTAB extends JavaPlugin {
+
+    @Override
+    public void onEnable() {
+        boolean folia = ReflectionUtils.classExists("io.papermc.paper.threadedregions.RegionizedServer");
+        try {
+            TAB.create(folia ? new FoliaPlatform(this) : new BukkitPlatform(this));
+        } catch (IllegalStateException e) {
+            Bukkit.getConsoleSender().sendMessage("§c[TAB] ================================================================================");
+            Bukkit.getConsoleSender().sendMessage("§c[TAB] Your server version (" + Bukkit.getBukkitVersion().split("-")[0] + ") is not supported.");
+            Bukkit.getConsoleSender().sendMessage("§c[TAB] This jar only supports 1.7.10, 1.8.8, 1.9.4 - 1.15.x, 1.16.5, 1.17.1, 1.18.2 - 1.21.11.");
+            Bukkit.getConsoleSender().sendMessage("§c[TAB] If you just updated to a new Minecraft version, check for TAB updates.");
+            Bukkit.getConsoleSender().sendMessage("§c[TAB] If you are using an unsupported 1.x version, use an older version of TAB (latest TAB 5.x supports all MC 1.x versions).");
+            Bukkit.getConsoleSender().sendMessage("§c[TAB] Thrown error message: " + e.getMessage());
+            Bukkit.getConsoleSender().sendMessage("§c[TAB] ================================================================================");
+        }
+    }
+
+    @Override
+    public void onDisable() {
+        if (TAB.getInstance() == null) return;
+        TAB.getInstance().unload();
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/BukkitTabCommand.java

@@ -0,0 +1,50 @@
+package me.neznamy.tab.platforms.bukkit;
+
+import me.neznamy.tab.platforms.bukkit.platform.BukkitPlatform;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.shared.chat.component.TabComponent;
+import me.neznamy.tab.shared.platform.TabPlayer;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandExecutor;
+import org.bukkit.command.CommandSender;
+import org.bukkit.command.TabCompleter;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * Command handler for /tab command
+ */
+public class BukkitTabCommand implements CommandExecutor, TabCompleter {
+
+    @Override
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, @NotNull String[] args) {
+        if (TAB.getInstance().isPluginDisabled()) {
+            for (TabComponent message : TAB.getInstance().getDisabledCommand().execute(args, sender.hasPermission(TabConstants.Permission.COMMAND_RELOAD), sender.hasPermission(TabConstants.Permission.COMMAND_ALL))) {
+                sender.sendMessage(((BukkitPlatform)TAB.getInstance().getPlatform()).toBukkitFormat(message));
+            }
+        } else {
+            TabPlayer p = null;
+            if (sender instanceof Player) {
+                p = TAB.getInstance().getPlayer(((Player)sender).getUniqueId());
+                if (p == null) return true; //player not loaded correctly
+            }
+            TAB.getInstance().getCommand().execute(p, args);
+        }
+        return false;
+    }
+
+    @Override
+    @NotNull
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, @NotNull String[] args) {
+        TabPlayer p = null;
+        if (sender instanceof Player) {
+            p = TAB.getInstance().getPlayer(((Player)sender).getUniqueId());
+            if (p == null) return Collections.emptyList(); //player not loaded correctly
+        }
+        return TAB.getInstance().getCommand().complete(p, args);
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/BukkitTabPlayer.java

@@ -0,0 +1,95 @@
+package me.neznamy.tab.platforms.bukkit;
+
+import me.neznamy.tab.platforms.bukkit.hook.LibsDisguisesHook;
+import me.neznamy.tab.platforms.bukkit.platform.BukkitPlatform;
+import me.neznamy.tab.shared.backend.BackendTabPlayer;
+import me.neznamy.tab.shared.chat.component.TabComponent;
+import org.bukkit.Statistic;
+import org.bukkit.entity.Player;
+import org.bukkit.metadata.MetadataValue;
+import org.bukkit.potion.PotionEffectType;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * TabPlayer implementation for Bukkit platform
+ */
+@SuppressWarnings("deprecation")
+public class BukkitTabPlayer extends BackendTabPlayer {
+
+    /**
+     * Constructs new instance with given bukkit player
+     *
+     * @param   platform
+     *          Server platform
+     * @param   p
+     *          bukkit player
+     */
+    public BukkitTabPlayer(@NotNull BukkitPlatform platform, @NotNull Player p) {
+        super(platform, p, p.getUniqueId(), p.getName(), p.getWorld().getName(), platform.getServerVersion().getNetworkId());
+    }
+
+    @Override
+    public boolean hasPermission(@NotNull String permission) {
+        return getPlayer().hasPermission(permission);
+    }
+
+    @Override
+    public int getPing() {
+        return getPlatform().getImplementationProvider().getPing(this);
+    }
+
+    @Override
+    public void sendMessage(@NotNull TabComponent message) {
+        getPlayer().sendMessage(getPlatform().toBukkitFormat(message));
+    }
+
+    @Override
+    public boolean hasInvisibilityPotion() {
+        return getPlayer().hasPotionEffect(PotionEffectType.INVISIBILITY);
+    }
+
+    @Override
+    public boolean isDisguised() {
+        return LibsDisguisesHook.isDisguised(this);
+    }
+
+    @Override
+    @NotNull
+    public Player getPlayer() {
+        return (Player) player;
+    }
+
+    @Override
+    public BukkitPlatform getPlatform() {
+        return (BukkitPlatform) platform;
+    }
+
+    @Override
+    public boolean isVanished0() {
+        for (MetadataValue v : getPlayer().getMetadata("vanished")) {
+            if (v.asBoolean()) return true;
+        }
+        return false;
+    }
+
+    @Override
+    public int getDeaths() {
+        return getPlayer().getStatistic(Statistic.DEATHS);
+    }
+
+    @Override
+    public int getGamemode() {
+        return getPlayer().getGameMode().getValue();
+    }
+
+    @Override
+    public double getHealth() {
+        return getPlayer().getHealth();
+    }
+
+    @Override
+    @NotNull
+    public String getDisplayName() {
+        return getPlayer().getDisplayName();
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/bossbar/BukkitBossBar.java

@@ -0,0 +1,76 @@
+package me.neznamy.tab.platforms.bukkit.bossbar;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+import me.neznamy.tab.shared.chat.component.TabComponent;
+import me.neznamy.tab.api.bossbar.BarColor;
+import me.neznamy.tab.api.bossbar.BarStyle;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.shared.platform.decorators.SafeBossBar;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import org.bukkit.Bukkit;
+import org.bukkit.boss.BossBar;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.UUID;
+
+/**
+ * BossBar for 1.9+ servers where Bukkit API is used. If ViaVersion is used
+ * to allow 1.8 players, it will handle the entity and teleporting by itself.
+ */
+@RequiredArgsConstructor
+public class BukkitBossBar extends SafeBossBar<BossBar> {
+
+    /** Flag indicating whether this class is available or not */
+    @Getter
+    private static final boolean available = ReflectionUtils.classExists("org.bukkit.boss.BossBar");
+
+    /** Style array because names do not match */
+    private static final org.bukkit.boss.BarStyle[] styles = available ? org.bukkit.boss.BarStyle.values() : null;
+
+    /** Player this handler belongs to */
+    @NotNull
+    private final BukkitTabPlayer player;
+
+    @Override
+    @NotNull
+    public BossBar constructBossBar(@NotNull UUID id, @NotNull TabComponent title, float progress, @NotNull BarColor color, @NotNull BarStyle style) {
+        BossBar bar = Bukkit.createBossBar(
+                player.getPlatform().toBukkitFormat(title),
+                org.bukkit.boss.BarColor.valueOf(color.name()),
+                styles[style.ordinal()]
+        );
+        bar.setProgress(progress);
+        return bar;
+    }
+
+    @Override
+    public void show(SafeBossBar<BossBar>.@NotNull BossBarInfo bar) {
+        bar.getBossBar().addPlayer(player.getPlayer());
+    }
+
+    @Override
+    public void updateTitle(SafeBossBar<BossBar>.@NotNull BossBarInfo bar) {
+        bar.getBossBar().setTitle(player.getPlatform().toBukkitFormat(bar.getTitle()));
+    }
+
+    @Override
+    public void updateProgress(SafeBossBar<BossBar>.@NotNull BossBarInfo bar) {
+        bar.getBossBar().setProgress(bar.getProgress());
+    }
+
+    @Override
+    public void updateStyle(SafeBossBar<BossBar>.@NotNull BossBarInfo bar) {
+        bar.getBossBar().setStyle(styles[bar.getStyle().ordinal()]);
+    }
+
+    @Override
+    public void updateColor(SafeBossBar<BossBar>.@NotNull BossBarInfo bar) {
+        bar.getBossBar().setColor(org.bukkit.boss.BarColor.valueOf(bar.getColor().name()));
+    }
+
+    @Override
+    public void hide(SafeBossBar<BossBar>.@NotNull BossBarInfo bar) {
+        bar.getBossBar().removePlayer(player.getPlayer());
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/bossbar/ViaBossBar.java

@@ -0,0 +1,70 @@
+package me.neznamy.tab.platforms.bukkit.bossbar;
+
+import com.viaversion.viaversion.api.Via;
+import com.viaversion.viaversion.api.legacy.bossbar.BossBar;
+import com.viaversion.viaversion.api.legacy.bossbar.BossColor;
+import com.viaversion.viaversion.api.legacy.bossbar.BossStyle;
+import lombok.RequiredArgsConstructor;
+import me.neznamy.tab.api.bossbar.BarColor;
+import me.neznamy.tab.api.bossbar.BarStyle;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.shared.chat.component.TabComponent;
+import me.neznamy.tab.shared.platform.decorators.SafeBossBar;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.UUID;
+
+/**
+ * Handler for 1.9+ players on 1.8 server using ViaVersion API.
+ */
+@RequiredArgsConstructor
+public class ViaBossBar extends SafeBossBar<BossBar> {
+
+    /** Style array for fast access */
+    private static final BossStyle[] styles = BossStyle.values();
+    
+    /** Player this handler belongs to */
+    @NotNull
+    private final BukkitTabPlayer player;
+
+    @Override
+    @NotNull
+    public BossBar constructBossBar(@NotNull UUID id, @NotNull TabComponent title, float progress, @NotNull BarColor color, @NotNull BarStyle style) {
+        return Via.getAPI().legacyAPI().createLegacyBossBar(
+                title.toLegacyText(),
+                progress,
+                BossColor.valueOf(color.name()),
+                styles[style.ordinal()]
+        );
+    }
+
+    @Override
+    public void show(@NotNull BossBarInfo bar) {
+        bar.getBossBar().addPlayer(player.getPlayer().getUniqueId());
+    }
+
+    @Override
+    public void updateTitle(@NotNull BossBarInfo bar) {
+        bar.getBossBar().setTitle(bar.getTitle().toLegacyText());
+    }
+
+    @Override
+    public void updateProgress(@NotNull BossBarInfo bar) {
+        bar.getBossBar().setHealth(bar.getProgress());
+    }
+
+    @Override
+    public void updateStyle(@NotNull BossBarInfo bar) {
+        bar.getBossBar().setStyle(styles[bar.getStyle().ordinal()]);
+    }
+
+    @Override
+    public void updateColor(@NotNull BossBarInfo bar) {
+        bar.getBossBar().setColor(BossColor.valueOf(bar.getColor().name()));
+    }
+
+    @Override
+    public void hide(@NotNull BossBarInfo bar) {
+        bar.getBossBar().removePlayer(player.getPlayer().getUniqueId());
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/features/BukkitTabExpansion.java

@@ -0,0 +1,148 @@
+package me.neznamy.tab.platforms.bukkit.features;
+
+import lombok.Getter;
+import me.clip.placeholderapi.PlaceholderAPI;
+import me.clip.placeholderapi.expansion.PlaceholderExpansion;
+import me.clip.placeholderapi.expansion.Relational;
+import me.neznamy.tab.api.placeholder.Placeholder;
+import me.neznamy.tab.shared.ProjectVariables;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.features.PlaceholderManagerImpl;
+import me.neznamy.tab.shared.placeholders.expansion.TabExpansion;
+import me.neznamy.tab.shared.placeholders.types.RelationalPlaceholderImpl;
+import me.neznamy.tab.shared.platform.TabPlayer;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * TAB's expansion for PlaceholderAPI
+ */
+@Getter
+public class BukkitTabExpansion extends PlaceholderExpansion implements TabExpansion, Relational {
+
+    /** List of all placeholders offered by the plugin for command suggestions */
+    @NotNull
+    private final List<String> placeholders = Collections.unmodifiableList(Arrays.asList(
+            "%tab_tabprefix%",
+            "%tab_tabsuffix%",
+            "%tab_tagprefix%",
+            "%tab_tagsuffix%",
+            "%tab_customtabname%",
+            "%tab_tabprefix_raw%",
+            "%tab_tabsuffix_raw%",
+            "%tab_tagprefix_raw%",
+            "%tab_tagsuffix_raw%",
+            "%tab_customtabname_raw%",
+            "%tab_scoreboard_name%",
+            "%tab_scoreboard_visible%",
+            "%tab_bossbar_visible%",
+            "%tab_nametag_visibility%",
+            "%tab_replace_<placeholder>%",
+            "%tab_placeholder_<placeholder>%"
+    ));
+
+    @Override
+    public boolean persist() {
+        return true;
+    }
+
+    @Override
+    @NotNull
+    public String getAuthor() {
+        return ProjectVariables.PLUGIN_AUTHOR;
+    }
+
+    @Override
+    @NotNull
+    public String getIdentifier() {
+        return ProjectVariables.PLUGIN_ID;
+    }
+
+    @Override
+    @NotNull
+    public String getVersion() {
+        return ProjectVariables.PLUGIN_VERSION;
+    }
+
+    @Override
+    @NotNull
+    public List<String> getPlaceholders() {
+        return placeholders;
+    }
+
+    @Override
+    @Nullable
+    public String onPlaceholderRequest(@Nullable Player player, @NotNull String identifier) {
+        if (identifier.startsWith("replace_")) {
+            String text = "%" + identifier.substring(8) + "%";
+            String textBefore;
+            do {
+                textBefore = text;
+                for (String placeholder : PlaceholderManagerImpl.detectPlaceholders(text)) {
+                    text = text.replace(placeholder, TAB.getInstance().getPlaceholderManager().findReplacement(placeholder,
+                            PlaceholderAPI.setPlaceholders(player, placeholder)));
+                }
+            } while (!textBefore.equals(text));
+            return text;
+        }
+        if (player == null) return "<Player cannot be null>";
+        TabPlayer p = TAB.getInstance().getPlayer(player.getUniqueId());
+        if (p == null) return "<Player is not loaded>";
+        if (identifier.startsWith("placeholder_")) {
+            String requestedPlaceholder = "%" + identifier.substring("placeholder_".length()) + "%";
+            PlaceholderManagerImpl pm = TAB.getInstance().getPlaceholderManager();
+            pm.addUsedPlaceholder(requestedPlaceholder, pm);
+            return pm.getPlaceholder(requestedPlaceholder).parse(p);
+        }
+        return p.expansionData.getValue(identifier);
+    }
+
+    @Override
+    public String onPlaceholderRequest(@NotNull Player viewer, @NotNull Player target, @NotNull String identifier) {
+        if (identifier.startsWith("replace_")) {
+            String text = "%" + identifier.substring(8) + "%";
+            String textBefore;
+            do {
+                textBefore = text;
+                for (String placeholder : PlaceholderManagerImpl.detectPlaceholders(text)) {
+                    text = text.replace(placeholder, TAB.getInstance().getPlaceholderManager().findReplacement(placeholder,
+                            PlaceholderAPI.setRelationalPlaceholders(viewer, target, placeholder)));
+                }
+            } while (!textBefore.equals(text));
+            return text;
+        }
+        if (identifier.startsWith("placeholder_")) {
+            String requestedPlaceholder = "%" + identifier.substring("placeholder_".length()) + "%";
+            PlaceholderManagerImpl pm = TAB.getInstance().getPlaceholderManager();
+            pm.addUsedPlaceholder(requestedPlaceholder, pm);
+            Placeholder placeholder = pm.getPlaceholder(requestedPlaceholder);
+            if (placeholder instanceof RelationalPlaceholderImpl) {
+                RelationalPlaceholderImpl rel = (RelationalPlaceholderImpl) placeholder;
+                TabPlayer v = TAB.getInstance().getPlayer(viewer.getUniqueId());
+                TabPlayer t = TAB.getInstance().getPlayer(target.getUniqueId());
+                if (v == null || t == null) return "<Player is not loaded>";
+                return rel.getLastValue(v, t);
+            } else {
+                return "<Not a relational placeholder: " + requestedPlaceholder + ">";
+            }
+        }
+        return "<Unknown identifier: \"" + identifier + "\">";
+    }
+
+    @Override
+    @SuppressWarnings({"UnstableApiUsage", "deprecation"})
+    public void unregisterExpansion() {
+        if (ReflectionUtils.methodExists(PlaceholderExpansion.class, "unregister")) {
+            // Added in 2.10.7 (Jul 28, 2020)
+            unregister();
+        } else {
+            PlaceholderAPI.unregisterExpansion(this);
+        }
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/features/PerWorldPlayerList.java

@@ -0,0 +1,179 @@
+package me.neznamy.tab.platforms.bukkit.features;
+
+import me.neznamy.tab.platforms.bukkit.platform.BukkitPlatform;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.shared.features.PerWorldPlayerListConfiguration;
+import me.neznamy.tab.shared.features.types.Loadable;
+import me.neznamy.tab.shared.features.types.TabFeature;
+import me.neznamy.tab.shared.features.types.UnLoadable;
+import me.neznamy.tab.shared.features.types.VanishListener;
+import me.neznamy.tab.shared.platform.TabPlayer;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerChangedWorldEvent;
+import org.bukkit.event.player.PlayerJoinEvent;
+import org.bukkit.metadata.MetadataValue;
+import org.bukkit.plugin.Plugin;
+import org.bukkit.plugin.java.JavaPlugin;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.List;
+import java.util.Map.Entry;
+
+/**
+ * Per-world-PlayerList feature handler
+ */
+@SuppressWarnings("deprecation")
+public class PerWorldPlayerList extends TabFeature implements Listener, Loadable, UnLoadable, VanishListener {
+
+    /** Reference to platform */
+    @NotNull
+    private final BukkitPlatform platform;
+
+    /** Config options */
+    @NotNull
+    private final PerWorldPlayerListConfiguration configuration;
+
+    /** Check for presence of modern (1.12.2+) methods that take plugin as argument to avoid conflict */
+    private final boolean modernMethodsAvailable = ReflectionUtils.methodExists(Player.class, "hidePlayer", Plugin.class, Player.class);
+
+    /**
+     * Constructs new instance and registers events.
+     *
+     * @param   plugin
+     *          Plugin instance to register events
+     * @param   platform
+     *          Platform reference
+     * @param   configuration
+     *          Feature configuration
+     */
+    public PerWorldPlayerList(@NotNull JavaPlugin plugin, @NotNull BukkitPlatform platform, @NotNull PerWorldPlayerListConfiguration configuration) {
+        this.configuration = configuration;
+        this.platform = platform;
+        Bukkit.getPluginManager().registerEvents(this, plugin);
+    }
+
+    @Override
+    public void load() {
+        for (Player p : platform.getOnlinePlayers()) {
+            checkPlayer(p);
+        }
+    }
+
+    @Override
+    public void unload() {
+        for (Player p : platform.getOnlinePlayers()) {
+            for (Player pl : platform.getOnlinePlayers()) {
+                showPlayer(p, pl);
+            }
+        }
+        HandlerList.unregisterAll(this);
+    }
+
+    /**
+     * Join event listener to synchronously perform hiding.
+     *
+     * @param   e
+     *          Join event
+     */
+    @EventHandler
+    public void onJoin(PlayerJoinEvent e) {
+        long time = System.nanoTime();
+        checkPlayer(e.getPlayer());
+        TAB.getInstance().getCPUManager().addTime(getFeatureName(), TabConstants.CpuUsageCategory.PLAYER_JOIN, System.nanoTime()-time);
+    }
+
+    /**
+     * World change listener to synchronously perform player showing/hiding.
+     *
+     * @param   e
+     *          World change event
+     */
+    @EventHandler
+    public void onWorldChange(PlayerChangedWorldEvent e) {
+        long time = System.nanoTime();
+        checkPlayer(e.getPlayer());
+        TAB.getInstance().getCPUManager().addTime(getFeatureName(), TabConstants.CpuUsageCategory.WORLD_SWITCH, System.nanoTime()-time);
+    }
+
+    /**
+     * Performs visibility check on the player. Shows players this player should see and does not,
+     * hides players the player should not see, shows the player to those who should see player and hides
+     * from those, who should not see.
+     *
+     * @param   p
+     *          Player to update
+     */
+    private void checkPlayer(@NotNull Player p) {
+        for (Player all : platform.getOnlinePlayers()) {
+            if (all == p) continue;
+            if (shouldSee(p, all)) {
+                showPlayer(p, all);
+            } else {
+                hidePlayer(p, all);
+            }
+            if (shouldSee(all, p)) {
+                showPlayer(all, p);
+            } else {
+                hidePlayer(all, p);
+            }
+        }
+    }
+
+    private void hidePlayer(@NotNull Player viewer, @NotNull Player target) {
+        if (modernMethodsAvailable) {
+            viewer.hidePlayer(platform.getPlugin(), target);
+        } else {
+            viewer.hidePlayer(target);
+        }
+    }
+
+    private void showPlayer(@NotNull Player viewer, @NotNull Player target) {
+        if (modernMethodsAvailable) {
+            viewer.showPlayer(platform.getPlugin(), target);
+        } else {
+            viewer.showPlayer(target);
+        }
+    }
+
+    /**
+     * Returns {@code true} if viewer should see target player, {@code false} if not.
+     * @param   viewer
+     *          Player viewing the TabList
+     * @param   target
+     *          Target displayed in the TabList
+     * @return  {@code true} if viewer should see target, {@code false} if not.
+     */
+    private boolean shouldSee(@NotNull Player viewer, @NotNull Player target) {
+        if (target == viewer) return true;
+        for (MetadataValue v : target.getMetadata("vanished")) {
+            if (v.asBoolean() && !viewer.hasPermission(TabConstants.Permission.SEE_VANISHED)) return false;
+        }
+        if ((configuration.isAllowBypassPermission() && viewer.hasPermission(TabConstants.Permission.PER_WORLD_PLAYERLIST_BYPASS)) || configuration.getIgnoredWorlds().contains(viewer.getWorld().getName())) return true;
+        String viewerWorldGroup = viewer.getWorld().getName() + "-default"; //preventing unwanted behavior when some group is called exactly like a world
+        String targetWorldGroup = target.getWorld().getName() + "-default";
+        for (Entry<String, List<String>> group : configuration.getSharedWorlds().entrySet()) {
+            if (group.getValue() != null) {
+                if (group.getValue().contains(viewer.getWorld().getName())) viewerWorldGroup = group.getKey();
+                if (group.getValue().contains(target.getWorld().getName())) targetWorldGroup = group.getKey();
+            }
+        }
+        return viewerWorldGroup.equals(targetWorldGroup);
+    }
+
+    @NotNull
+    @Override
+    public String getFeatureName() {
+        return "Per world PlayerList";
+    }
+
+    @Override
+    public void onVanishStatusChange(@NotNull TabPlayer player) {
+        platform.runSync((Player) player.getPlayer(), () -> checkPlayer((Player) player.getPlayer()));
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/hook/BukkitPremiumVanishHook.java

@@ -0,0 +1,23 @@
+package me.neznamy.tab.platforms.bukkit.hook;
+
+import de.myzelyam.api.vanish.VanishAPI;
+import me.neznamy.tab.api.TabPlayer;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.shared.hook.PremiumVanishHook;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * PremiumVanish hook for Bukkit.
+ */
+public class BukkitPremiumVanishHook extends PremiumVanishHook {
+
+    @Override
+    public boolean canSee(@NotNull TabPlayer viewer, @NotNull TabPlayer target) {
+        return VanishAPI.canSee(((BukkitTabPlayer)viewer).getPlayer(), ((BukkitTabPlayer)target).getPlayer());
+    }
+
+    @Override
+    public boolean isVanished(@NotNull TabPlayer player) {
+        return VanishAPI.isInvisible(((BukkitTabPlayer)player).getPlayer());
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/hook/LibsDisguisesHook.java

@@ -0,0 +1,33 @@
+package me.neznamy.tab.platforms.bukkit.hook;
+
+import me.libraryaddict.disguise.DisguiseAPI;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.shared.platform.TabPlayer;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+
+/**
+ * Class for hooking into LibsDisguises to get disguise status of players.
+ */
+public class LibsDisguisesHook {
+
+    /** Flag tracking if LibsDisguises is installed or not */
+    private static boolean installed = ReflectionUtils.classExists("me.libraryaddict.disguise.DisguiseAPI");
+
+    /**
+     * Returns {@code true} if LibsDisguises is installed and player is disguised,
+     * {@code false} otherwise.
+     *
+     * @param   player
+     *          Player to check
+     * @return  {@code true} if disguised, {@code false} otherwise
+     */
+    public static boolean isDisguised(TabPlayer player) {
+        try {
+            return installed && DisguiseAPI.isDisguised(((BukkitTabPlayer)player).getPlayer());
+        } catch (LinkageError e) {
+            //java.lang.NoClassDefFoundError: Could not initialize class me.libraryaddict.disguise.DisguiseAPI
+            installed = false;
+            return false;
+        }
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/platform/BukkitPlatform.java

@@ -0,0 +1,502 @@
+package me.neznamy.tab.platforms.bukkit.platform;
+
+import lombok.Getter;
+import lombok.Setter;
+import lombok.SneakyThrows;
+import me.clip.placeholderapi.PlaceholderAPI;
+import me.clip.placeholderapi.PlaceholderAPIPlugin;
+import me.clip.placeholderapi.expansion.PlaceholderExpansion;
+import me.neznamy.tab.platforms.bukkit.BukkitEventListener;
+import me.neznamy.tab.platforms.bukkit.BukkitPipelineInjector;
+import me.neznamy.tab.platforms.bukkit.BukkitTabCommand;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.platforms.bukkit.bossbar.BukkitBossBar;
+import me.neznamy.tab.platforms.bukkit.bossbar.ViaBossBar;
+import me.neznamy.tab.platforms.bukkit.features.BukkitTabExpansion;
+import me.neznamy.tab.platforms.bukkit.features.PerWorldPlayerList;
+import me.neznamy.tab.platforms.bukkit.hook.BukkitPremiumVanishHook;
+import me.neznamy.tab.platforms.bukkit.provider.ImplementationProvider;
+import me.neznamy.tab.shared.*;
+import me.neznamy.tab.shared.backend.BackendPlatform;
+import me.neznamy.tab.shared.chat.TabTextColor;
+import me.neznamy.tab.shared.chat.component.TabComponent;
+import me.neznamy.tab.shared.chat.component.TabKeybindComponent;
+import me.neznamy.tab.shared.chat.component.TabTextComponent;
+import me.neznamy.tab.shared.chat.component.TabTranslatableComponent;
+import me.neznamy.tab.shared.chat.component.object.TabObjectComponent;
+import me.neznamy.tab.shared.features.PerWorldPlayerListConfiguration;
+import me.neznamy.tab.shared.features.injection.PipelineInjector;
+import me.neznamy.tab.shared.features.types.TabFeature;
+import me.neznamy.tab.shared.placeholders.expansion.EmptyTabExpansion;
+import me.neznamy.tab.shared.placeholders.expansion.TabExpansion;
+import me.neznamy.tab.shared.placeholders.types.PlayerPlaceholderImpl;
+import me.neznamy.tab.shared.platform.BossBar;
+import me.neznamy.tab.shared.platform.Scoreboard;
+import me.neznamy.tab.shared.platform.TabList;
+import me.neznamy.tab.shared.platform.TabPlayer;
+import me.neznamy.tab.shared.platform.impl.AdventureBossBar;
+import me.neznamy.tab.shared.platform.impl.DummyBossBar;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import net.kyori.adventure.audience.Audience;
+import org.bstats.bukkit.Metrics;
+import org.bstats.charts.SimplePie;
+import org.bukkit.Bukkit;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.bukkit.command.PluginCommand;
+import org.bukkit.command.SimpleCommandMap;
+import org.bukkit.command.defaults.BukkitCommand;
+import org.bukkit.entity.Entity;
+import org.bukkit.entity.Player;
+import org.bukkit.plugin.Plugin;
+import org.bukkit.plugin.java.JavaPlugin;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.io.File;
+import java.util.*;
+import java.util.function.BiConsumer;
+
+/**
+ * Implementation of Platform interface for Bukkit platform
+ */
+@Getter
+public class BukkitPlatform implements BackendPlatform {
+
+    /** Plugin instance for registering tasks and events */
+    @NotNull
+    private final JavaPlugin plugin;
+
+    /** Server version */
+    private final ProtocolVersion serverVersion = ProtocolVersion.fromFriendlyName(Bukkit.getBukkitVersion().split("-")[0]);
+
+    /** Variables checking presence of other plugins to hook into */
+    private final boolean placeholderAPI = ReflectionUtils.classExists("me.clip.placeholderapi.PlaceholderAPI");
+
+    /** Spigot field for tracking TPS, the array is final and only being modified instead of re-instantiated */
+    private double[] recentTps;
+
+    /** Detection for presence of Paper's TPS getter */
+    private final boolean paperTps = ReflectionUtils.methodExists(Bukkit.class, "getTPS");
+
+    /** Detection for presence of Paper's MSPT getter */
+    private final boolean paperMspt = ReflectionUtils.methodExists(Bukkit.class, "getAverageTickTime");
+
+    /** Package name of the server implementation, null on Paper 1.20.5+ / Spigot 26+ */
+    @Nullable
+    private final String serverPackage;
+
+    /** Implementation for creating new instances using content available on the server */
+    @NotNull
+    @Setter
+    private ImplementationProvider implementationProvider;
+
+    private final boolean modernOnlinePlayers;
+
+    /** Command map for dynamic command registering */
+    private final SimpleCommandMap commandMap;
+    private final Map<String, Command> knownCommands;
+
+    /** List of custom commands registered to be able to unregister them on reload */
+    private final List<Command> customCommands = new ArrayList<>();
+
+    /**
+     * Constructs new instance with given plugin.
+     *
+     * @param   plugin
+     *          Plugin
+     */
+    @SneakyThrows
+    @SuppressWarnings("unchecked")
+    public BukkitPlatform(@NotNull JavaPlugin plugin) {
+        this.plugin = plugin;
+        modernOnlinePlayers = Bukkit.class.getMethod("getOnlinePlayers").getReturnType() == Collection.class;
+        String CRAFTBUKKIT_PACKAGE = Bukkit.getServer().getClass().getPackage().getName();
+        String[] array = CRAFTBUKKIT_PACKAGE.split("\\.");
+        serverPackage = array.length > 3 ? array[3] : null;
+        implementationProvider = findImplementationProvider();
+        logInfo(new TabTextComponent("Found NMS implementation: " + implementationProvider.getClass().getName(), TabTextColor.GRAY));
+        try {
+            Object server = Bukkit.getServer().getClass().getMethod("getServer").invoke(Bukkit.getServer());
+            recentTps = ((double[]) server.getClass().getField("recentTps").get(server));
+        } catch (ReflectiveOperationException ignored) {
+            //not spigot
+        }
+        if (Bukkit.getPluginManager().isPluginEnabled("PremiumVanish")) {
+            new BukkitPremiumVanishHook().register();
+        }
+        commandMap = (SimpleCommandMap) Bukkit.getServer().getClass().getMethod("getCommandMap").invoke(Bukkit.getServer());
+        knownCommands = (Map<String, Command>) ReflectionUtils.getField(SimpleCommandMap.class, "knownCommands").get(commandMap);
+    }
+
+    /**
+     * Finds implementation provider for current server software and version.
+     *
+     * @return  Implementation provider for current server
+     * @throws  IllegalStateException
+     *          If no implementation was found
+     */
+    @NotNull
+    private ImplementationProvider findImplementationProvider() {
+        if (serverPackage != null) {
+            // Paper <1.20.5 or Spigot 1.x
+            try {
+                // Does not actually support flat 1.19, but whatever, no one is using it anyway
+                return (ImplementationProvider) Class.forName("me.neznamy.tab.platforms.bukkit." + serverPackage + ".NMSImplementationProvider").getConstructor().newInstance();
+            } catch (ReflectiveOperationException ignored) {
+                throw new IllegalStateException("Implementation for version \"" + serverPackage + "\" was not found.");
+            }
+        }
+
+        Map<ProtocolVersion, String> spigotVersions = new LinkedHashMap<>();
+        spigotVersions.put(ProtocolVersion.V26_1, "v26_1");
+
+        Map<ProtocolVersion, String> paperVersions = new LinkedHashMap<>();
+        paperVersions.put(ProtocolVersion.V1_20_5, "paper_1_20_5");
+        paperVersions.put(ProtocolVersion.V1_20_6, "paper_1_20_5");
+        paperVersions.put(ProtocolVersion.V1_21, "paper_1_20_5");
+        paperVersions.put(ProtocolVersion.V1_21_1, "paper_1_20_5");
+        paperVersions.put(ProtocolVersion.V1_21_2, "paper_1_21_2");
+        paperVersions.put(ProtocolVersion.V1_21_3, "paper_1_21_2");
+        paperVersions.put(ProtocolVersion.V1_21_4, "paper_1_21_4");
+        paperVersions.put(ProtocolVersion.V1_21_5, "paper_1_21_4");
+        paperVersions.put(ProtocolVersion.V1_21_6, "paper_1_21_4");
+        paperVersions.put(ProtocolVersion.V1_21_7, "paper_1_21_4");
+        paperVersions.put(ProtocolVersion.V1_21_8, "paper_1_21_4");
+        paperVersions.put(ProtocolVersion.V1_21_9, "paper_1_21_9");
+        paperVersions.put(ProtocolVersion.V1_21_10, "paper_1_21_9");
+        paperVersions.put(ProtocolVersion.V1_21_11, "paper_1_21_11");
+
+        String software;
+        Map<ProtocolVersion, String> versions;
+        if (paperTps) {  // This needs a better check
+            software = "Paper";
+            versions = paperVersions;
+        } else {
+            software = "Spigot";
+            versions = spigotVersions;
+        }
+        String serverVersionString = Bukkit.getBukkitVersion().split("-")[0];
+        String implementation = versions.get(serverVersion);
+        if (implementation == null) {
+            throw new IllegalStateException(String.format("No implementation is available for your server version (%s %s).", software, serverVersionString));
+        }
+        try {
+            return (ImplementationProvider) Class.forName("me.neznamy.tab.platforms.bukkit." + implementation + ".NMSImplementationProvider").getConstructor().newInstance();
+        } catch (ClassNotFoundException e) {
+            throw new IllegalStateException(String.format("Your server version (%s %s) is marked as compatible, but the implementation does not exist. This is probably a bug.", software, serverVersionString), e);
+        } catch (ReflectiveOperationException e) {
+            throw new IllegalStateException(String.format("Failed to initialize implementation for %s %s. This is probably a bug.", software, serverVersionString), e);
+        }
+    }
+
+    @Override
+    public void loadPlayers() {
+        for (Player p : getOnlinePlayers()) {
+            TAB.getInstance().addPlayer(new BukkitTabPlayer(this, p));
+        }
+    }
+
+    @Override
+    @Nullable
+    public PipelineInjector createPipelineInjector() {
+        return ReflectionUtils.classExists("io.netty.channel.Channel") ? new BukkitPipelineInjector() : null;
+    }
+
+    @Override
+    @NotNull
+    public TabExpansion createTabExpansion() {
+        if (placeholderAPI) {
+            BukkitTabExpansion expansion = new BukkitTabExpansion();
+            expansion.register();
+            return expansion;
+        }
+        return new EmptyTabExpansion();
+    }
+
+    @Override
+    @Nullable
+    public TabFeature getPerWorldPlayerList(@NotNull PerWorldPlayerListConfiguration configuration) {
+        return new PerWorldPlayerList(plugin, this, configuration);
+    }
+
+    @Override
+    public void registerUnknownPlaceholder(@NotNull String identifier) {
+        if (!placeholderAPI) {
+            registerDummyPlaceholder(identifier);
+            return;
+        }
+        if (identifier.startsWith("%rel_")) {
+            //relational placeholder
+            TAB.getInstance().getPlaceholderManager().registerRelationalPlaceholder(identifier, (viewer, target) ->
+                    PlaceholderAPI.setRelationalPlaceholders((Player) viewer.getPlayer(), (Player) target.getPlayer(), identifier));
+        } else if (identifier.startsWith("%sync:")) {
+            registerSyncPlaceholder(identifier);
+        } else if (identifier.startsWith("%server_")) {
+            boolean stripLeadingAsterisk = identifier.startsWith("%server_tps");
+            TAB.getInstance().getPlaceholderManager().registerServerPlaceholder(identifier,
+                    () -> {
+                        String out = PlaceholderAPI.setPlaceholders(null, identifier);
+                        return stripLeadingAsterisk && out != null && out.startsWith("*") ? out.substring(1) : out;
+                    });
+        } else {
+            TAB.getInstance().getPlaceholderManager().registerPlayerPlaceholder(identifier,
+                    p -> PlaceholderAPI.setPlaceholders((Player) p.getPlayer(), identifier));
+        }
+    }
+
+    /**
+     * Registers a sync placeholder with given identifier and automatically decided refresh.
+     *
+     * @param   identifier
+     *          Placeholder identifier
+     */
+    public void registerSyncPlaceholder(@NotNull String identifier) {
+        String syncedPlaceholder = "%" + identifier.substring(6);
+        PlayerPlaceholderImpl[] ppl = new PlayerPlaceholderImpl[1];
+        ppl[0] = TAB.getInstance().getPlaceholderManager().registerPlayerPlaceholder(identifier, p -> {
+            Bukkit.getScheduler().runTask(plugin, () -> {
+                long time = System.nanoTime();
+                ppl[0].updateValue(p, placeholderAPI ? PlaceholderAPI.setPlaceholders((Player) p.getPlayer(), syncedPlaceholder) : identifier);
+                long totalTime =  System.nanoTime()-time;
+                TAB.getInstance().getCPUManager().addPlaceholderTime(identifier, totalTime);
+                TAB.getInstance().getCpu().addTime(TAB.getInstance().getPlaceholderManager().getFeatureName(), TabConstants.CpuUsageCategory.PLACEHOLDER_REQUEST, totalTime);
+            });
+            return null;
+        });
+    }
+
+    @Override
+    public void logInfo(@NotNull TabComponent message) {
+        Bukkit.getConsoleSender().sendMessage("[TAB] " + toBukkitFormat(message));
+    }
+
+    @Override
+    public void logWarn(@NotNull TabComponent message) {
+        Bukkit.getConsoleSender().sendMessage("§c[TAB] [WARN] " + toBukkitFormat(message));
+    }
+
+    @Override
+    public void registerListener() {
+        Bukkit.getPluginManager().registerEvents(new BukkitEventListener(this), plugin);
+    }
+
+    @Override
+    public void registerCommand() {
+        PluginCommand command = Bukkit.getPluginCommand(getCommand());
+        if (command != null) {
+            BukkitTabCommand cmd = new BukkitTabCommand();
+            command.setExecutor(cmd);
+            command.setTabCompleter(cmd);
+        } else {
+            logWarn(new TabTextComponent("Failed to register command, is it defined in plugin.yml?", TabTextColor.RED));
+        }
+    }
+
+    @Override
+    public void startMetrics() {
+        Metrics metrics = new Metrics(plugin, TabConstants.BSTATS_PLUGIN_ID_BUKKIT);
+        metrics.addCustomChart(new SimplePie(TabConstants.MetricsChart.PERMISSION_SYSTEM,
+                () -> TAB.getInstance().getGroupManager().getPermissionPlugin()));
+        metrics.addCustomChart(new SimplePie("tab_6_0_0_servers", serverVersion::getFriendlyName));
+    }
+
+    @Override
+    @NotNull
+    public File getDataFolder() {
+        return plugin.getDataFolder();
+    }
+
+    @Override
+    @NotNull
+    public Object convertComponent(@NotNull TabComponent component) {
+        return implementationProvider.getComponentConverter().convert(component);
+    }
+
+    @Override
+    @NotNull
+    public Scoreboard createScoreboard(@NotNull TabPlayer player) {
+        return implementationProvider.newScoreboard((BukkitTabPlayer) player);
+    }
+
+    @Override
+    @NotNull
+    public BossBar createBossBar(@NotNull TabPlayer player) {
+        //noinspection ConstantValue
+        if (AdventureBossBar.isAvailable() && Audience.class.isAssignableFrom(Player.class)) return new AdventureBossBar(player);
+
+        // 1.9+ server, handle using API, potential 1.8 players are handled by ViaVersion
+        if (BukkitBossBar.isAvailable()) return new BukkitBossBar((BukkitTabPlayer) player);
+
+        // 1.9+ player on 1.8 server, handle using ViaVersion API
+        if (player.getVersion().getNetworkId() >= ProtocolVersion.V1_9.getNetworkId()) return new ViaBossBar((BukkitTabPlayer) player);
+
+        // 1.8- server and player, no implementation
+        return new DummyBossBar();
+    }
+
+    @Override
+    @NotNull
+    public TabList createTabList(@NotNull TabPlayer player) {
+        return implementationProvider.newTabList((BukkitTabPlayer) player);
+    }
+
+    @Override
+    public boolean supportsScoreboards() {
+        return true;
+    }
+
+    @Override
+    public boolean supportsListed() {
+        return serverVersion.getNetworkId() >= ProtocolVersion.V1_19_3.getNetworkId();
+    }
+
+    @Override
+    public boolean supportsListOrder() {
+        return serverVersion.getNetworkId() >= ProtocolVersion.V1_21_2.getNetworkId();
+    }
+
+    @Override
+    public boolean isSafeFromPacketEventsBug() {
+        return serverVersion.getMinorVersion() >= 13;
+    }
+
+    @Override
+    public void registerCustomCommand(@NotNull String commandName, @NotNull BiConsumer<TabPlayer, String[]> function) {
+        Command cmd = new BukkitCommand(commandName) {
+
+            @Override
+            public boolean execute(@NotNull CommandSender commandSender, @NotNull String alias, @NotNull String[] args) {
+                if (commandSender instanceof Player) {
+                    TabPlayer p = TAB.getInstance().getPlayer(((Player) commandSender).getUniqueId());
+                    if (p == null) return false; //player not loaded correctly
+                    function.accept(p, args);
+                } else {
+                    commandSender.sendMessage(toBukkitFormat(
+                            TabComponent.fromColoredText(TAB.getInstance().getConfiguration().getMessages().getCommandOnlyFromGame())
+                    ));
+                }
+                return false;
+            }
+        };
+        commandMap.register(commandName, cmd);
+        customCommands.add(cmd);
+    }
+
+    @Override
+    public void unregisterAllCustomCommands() {
+        for (Command command : customCommands) {
+            knownCommands.remove(command.getName());
+            knownCommands.remove(command.getName() + ":" + command.getName());
+            command.unregister(commandMap);
+        }
+    }
+
+    @Override
+    public double getTPS() {
+        if (recentTps != null) {
+            return recentTps[0];
+        } else if (paperTps) {
+            return Bukkit.getTPS()[0];
+        } else {
+            return -1;
+        }
+    }
+
+    @Override
+    public double getMSPT() {
+        if (paperMspt) return Bukkit.getAverageTickTime();
+        return -1;
+    }
+
+    /**
+     * Runs task in the main thread for given entity.
+     *
+     * @param   entity
+     *          Entity's main thread
+     * @param   task
+     *          Task to run
+     */
+    public void runSync(@NotNull Entity entity, @NotNull Runnable task) {
+        Bukkit.getScheduler().runTask(plugin, task);
+    }
+
+    /**
+     * Converts component to string using bukkit RGB format if supported by the server.
+     * If not, closest legacy color is used instead.
+     *
+     * @param   component
+     *          Component to convert
+     * @return  Converted string using bukkit color format
+     */
+    @NotNull
+    public String toBukkitFormat(@NotNull TabComponent component) {
+        StringBuilder sb = new StringBuilder();
+        if (component.getModifier().getColor() != null) {
+            if (serverVersion.getNetworkId() >= ProtocolVersion.V1_16.getNetworkId()) {
+                String hexCode = component.getModifier().getColor().getHexCode();
+                sb.append('§').append("x").append('§').append(hexCode.charAt(0)).append('§').append(hexCode.charAt(1))
+                        .append('§').append(hexCode.charAt(2)).append('§').append(hexCode.charAt(3))
+                        .append('§').append(hexCode.charAt(4)).append('§').append(hexCode.charAt(5));
+            } else {
+                sb.append('§').append(component.getModifier().getColor().getLegacyColor().getCharacter());
+            }
+        }
+        sb.append(component.getModifier().getMagicCodes());
+        if (component instanceof TabTextComponent) {
+            sb.append(((TabTextComponent) component).getText());
+        } else if (component instanceof TabTranslatableComponent) {
+            sb.append(((TabTranslatableComponent) component).getKey());
+        } else if (component instanceof TabKeybindComponent) {
+            sb.append(((TabKeybindComponent) component).getKeybind());
+        } else if (component instanceof TabObjectComponent) {
+            sb.append(component.toLegacyText());
+        } else {
+            throw new IllegalStateException("Unexpected component type: " + component.getClass().getName());
+        }
+        for (TabComponent extra : component.getExtra()) {
+            sb.append(toBukkitFormat(extra));
+        }
+        return sb.toString();
+    }
+
+    /**
+     * Returns online players from Bukkit API.
+     * This method may use reflections, because the return type changed in 1.7.10,
+     * and we want to avoid errors.
+     *
+     * @return  Online players from Bukkit API.
+     */
+    @SneakyThrows
+    @NotNull
+    public Collection<? extends Player> getOnlinePlayers() {
+        if (modernOnlinePlayers) {
+            return Bukkit.getOnlinePlayers();
+        }
+        return Arrays.asList((Player[]) Bukkit.class.getMethod("getOnlinePlayers").invoke(null));
+    }
+
+    @Override
+    @NotNull
+    public Object dump() {
+        Map<String, Object> map = new LinkedHashMap<>();
+        map.put("server-type", "Bukkit");
+        map.put("server-name", Bukkit.getName());
+        map.put("server-version", Bukkit.getBukkitVersion().split("-")[0]);
+        map.put("craftbukkit-package", serverPackage);
+        map.put("tab-version", ProjectVariables.PLUGIN_VERSION);
+        Map<String, Object> plugins = new LinkedHashMap<>();
+        for (Plugin p : Bukkit.getPluginManager().getPlugins()) {
+            plugins.put(p.getDescription().getName(), p.getDescription().getVersion());
+        }
+        map.put("plugins", plugins);
+        if (placeholderAPI) {
+            Map<String, String> expansions = new LinkedHashMap<>();
+            for (PlaceholderExpansion p : PlaceholderAPIPlugin.getInstance().getLocalExpansionManager().getExpansions()) {
+                expansions.put(p.getIdentifier(), p.getVersion());
+            }
+            map.put("placeholderapi-expansions", expansions);
+        }
+        return map;
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/platform/FoliaPlatform.java

@@ -0,0 +1,146 @@
+package me.neznamy.tab.platforms.bukkit.platform;
+
+import lombok.NonNull;
+import lombok.SneakyThrows;
+import me.clip.placeholderapi.PlaceholderAPI;
+import me.neznamy.tab.platforms.bukkit.features.PerWorldPlayerList;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.shared.cpu.TimedCaughtTask;
+import me.neznamy.tab.shared.data.World;
+import me.neznamy.tab.shared.placeholders.types.PlayerPlaceholderImpl;
+import me.neznamy.tab.shared.platform.TabPlayer;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Entity;
+import org.bukkit.entity.Player;
+import org.bukkit.event.player.PlayerChangedWorldEvent;
+import org.bukkit.plugin.Plugin;
+import org.bukkit.plugin.java.JavaPlugin;
+import org.jetbrains.annotations.NotNull;
+
+import java.text.DecimalFormat;
+import java.text.DecimalFormatSymbols;
+import java.util.function.Consumer;
+import java.util.function.Function;
+
+/**
+ * Platform override for Folia.
+ */
+public class FoliaPlatform extends BukkitPlatform {
+
+    /**
+     * Constructs new instance with given plugin.
+     *
+     * @param   plugin
+     *          Plugin
+     */
+    public FoliaPlatform(@NotNull JavaPlugin plugin) {
+        super(plugin);
+    }
+
+    @Override
+    public void loadPlayers() {
+        super.loadPlayers();
+
+        // Folia never calls PlayerChangedWorldEvent, this is a workaround
+        TAB.getInstance().getCpu().getProcessingThread().repeatTask(new TimedCaughtTask(TAB.getInstance().getCpu(), ()  -> {
+            for (TabPlayer player : TAB.getInstance().getOnlinePlayers()) {
+                World actualWorld = World.byName(((Player) player.getPlayer()).getWorld().getName());
+                if (player.world != actualWorld) {
+                    TAB.getInstance().getFeatureManager().onWorldChange(player.getUniqueId(), actualWorld);
+                    PerWorldPlayerList pwp = TAB.getInstance().getFeatureManager().getFeature(TabConstants.Feature.PER_WORLD_PLAYER_LIST);
+                    if (pwp != null) {
+                        runSync((Entity) player.getPlayer(), () -> pwp.onWorldChange(new PlayerChangedWorldEvent((Player) player.getPlayer(), ((Player) player.getPlayer()).getWorld())));
+                    }
+                }
+            }
+        }, "Folia compatibility", "Refreshing world"), 100);
+    }
+
+    @Override
+    public void registerPlaceholders() {
+        super.registerPlaceholders();
+        DecimalFormat decimal2;
+        DecimalFormatSymbols symbols = new DecimalFormatSymbols();
+        symbols.setDecimalSeparator('.');
+        decimal2 = new DecimalFormat("#.##", symbols);
+        registerInternalSyncPlaceholder(TabConstants.Placeholder.MSPT, p -> decimal2.format(Bukkit.getAverageTickTime()));
+        registerInternalSyncPlaceholder(TabConstants.Placeholder.TPS, p -> decimal2.format(Math.min(20, Bukkit.getTPS()[0])));
+    }
+
+    @Override
+    public void registerSyncPlaceholder(@NotNull String identifier) {
+        String syncedPlaceholder = "%" + identifier.substring(6);
+        PlayerPlaceholderImpl[] ppl = new PlayerPlaceholderImpl[1];
+        ppl[0] = TAB.getInstance().getPlaceholderManager().registerPlayerPlaceholder(identifier, p -> {
+            runSync((Entity) p.getPlayer(), () -> {
+                long time = System.nanoTime();
+                String output = isPlaceholderAPI() ? PlaceholderAPI.setPlaceholders((Player) p.getPlayer(), syncedPlaceholder) : identifier;
+                long totalTime =  System.nanoTime()-time;
+                TAB.getInstance().getCPUManager().addPlaceholderTime(identifier, totalTime);
+                TAB.getInstance().getCpu().addTime(TAB.getInstance().getPlaceholderManager().getFeatureName(), TabConstants.CpuUsageCategory.PLACEHOLDER_REQUEST, totalTime);
+                TAB.getInstance().getCPUManager().runTask(() -> ppl[0].updateValue(p, output)); // To ensure player is loaded
+            });
+            return null;
+        });
+    }
+
+    private void registerInternalSyncPlaceholder(@NonNull String identifier, @NonNull Function<TabPlayer, String> function) {
+        PlayerPlaceholderImpl[] ppl = new PlayerPlaceholderImpl[1];
+        ppl[0] = TAB.getInstance().getPlaceholderManager().registerPlayerPlaceholder(identifier, p -> {
+            runSync((Entity) p.getPlayer(), () -> {
+                long time = System.nanoTime();
+                String output = function.apply((TabPlayer) p);
+                long totalTime =  System.nanoTime()-time;
+                TAB.getInstance().getCPUManager().addPlaceholderTime(identifier, totalTime);
+                TAB.getInstance().getCpu().addTime(TAB.getInstance().getPlaceholderManager().getFeatureName(), TabConstants.CpuUsageCategory.PLACEHOLDER_REQUEST, totalTime);
+                TAB.getInstance().getCPUManager().runTask(() -> ppl[0].updateValue(p, output)); // To ensure player is loaded
+            });
+            return null;
+        });
+    }
+
+    /**
+     * Overriding the method to fix initial error caused by ServerPlaceholder implementation trying to
+     * retrieve the value in constructor, but folia does not support that. Overriding this function to avoid the
+     * MSPT function being called in the wrong thread.
+     *
+     * @return  -1
+     */
+    @Override
+    public double getMSPT() {
+        return -1;
+    }
+
+    /**
+     * Overriding the method to fix initial error caused by ServerPlaceholder implementation trying to
+     * retrieve the value in constructor, but folia does not support that. Overriding this function to avoid the
+     * TPS function being called in the wrong thread.
+     *
+     * @return  -1
+     */
+    @Override
+    public double getTPS() {
+        return -1;
+    }
+
+    /**
+     * Runs task using player's entity scheduler. It's using reflection, because
+     * Folia uses Java 17 while TAB maintains Java 8 compatibility for compatibility
+     * with MC versions older than their player base.
+     *
+     * @param   entity
+     *          entity to run task for
+     * @param   task
+     *          Task to run
+     */
+    @Override
+    @SneakyThrows
+    @SuppressWarnings("JavaReflectionMemberAccess")
+    public void runSync(@NotNull Entity entity, @NotNull Runnable task) {
+        Object entityScheduler = Entity.class.getMethod("getScheduler").invoke(entity);
+        Consumer<?> consumer = $ -> task.run(); // Reflection and lambdas don't go together
+        entityScheduler.getClass().getMethod("run", Plugin.class, Consumer.class, Runnable.class)
+                .invoke(entityScheduler, getPlugin(), consumer, null);
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/provider/ComponentConverter.java

@@ -0,0 +1,134 @@
+package me.neznamy.tab.platforms.bukkit.provider;
+
+import me.neznamy.tab.shared.chat.TabStyle;
+import me.neznamy.tab.shared.chat.component.TabKeybindComponent;
+import me.neznamy.tab.shared.chat.component.TabComponent;
+import me.neznamy.tab.shared.chat.component.TabTextComponent;
+import me.neznamy.tab.shared.chat.component.TabTranslatableComponent;
+import me.neznamy.tab.shared.chat.component.object.TabAtlasSprite;
+import me.neznamy.tab.shared.chat.component.object.TabObjectComponent;
+import me.neznamy.tab.shared.chat.component.object.TabPlayerSprite;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.UUID;
+
+/**
+ * Interface for converting TAB components into NMS components (1.7+).
+ *
+ * @param   <T>
+ *          NMS component type
+ */
+public abstract class ComponentConverter<T> {
+
+    /** Empty UUID for creating dummy profiles */
+    protected final UUID NIL_UUID = new UUID(0, 0);
+
+    /**
+     * Converts TAB component to NMS component.
+     *
+     * @param   component
+     *          Component to convert
+     * @return  Converted component
+     */
+    @NotNull
+    public T convert(@NotNull TabComponent component) {
+        // Component type
+        T nmsComponent;
+        if (component instanceof TabTextComponent) {
+            nmsComponent = newTextComponent(((TabTextComponent) component).getText());
+        } else if (component instanceof TabTranslatableComponent) {
+            nmsComponent = newTranslatableComponent(((TabTranslatableComponent) component).getKey());
+        } else if (component instanceof TabKeybindComponent) {
+            nmsComponent = newKeybindComponent(((TabKeybindComponent)component).getKeybind());
+        } else if (component instanceof TabObjectComponent) {
+            if ((((TabObjectComponent) component).getContents() instanceof TabAtlasSprite)) {
+                nmsComponent = newObjectComponent((TabAtlasSprite) ((TabObjectComponent) component).getContents());
+            } else if ((((TabObjectComponent) component).getContents() instanceof TabPlayerSprite)) {
+                nmsComponent = newObjectComponent((TabPlayerSprite) ((TabObjectComponent) component).getContents());
+            } else {
+                throw new IllegalArgumentException("Unexpected object component type: " + ((TabObjectComponent) component).getContents().getClass().getName());
+            }
+        } else {
+            throw new IllegalArgumentException("Unexpected component type: " + component.getClass().getName());
+        }
+
+        // Component style
+        applyStyle(nmsComponent, component.getModifier());
+
+        // Extra
+        for (TabComponent extra : component.getExtra()) {
+            addSibling(nmsComponent, convert(extra));
+        }
+
+        return nmsComponent;
+    }
+
+    /**
+     * Creates a new text component with given text.
+     *
+     * @param   text
+     *          Text to display
+     * @return  Text component with given text
+     */
+    @NotNull
+    public abstract T newTextComponent(@NotNull String text);
+
+    /**
+     * Creates a new translatable component with the given key.
+     *
+     * @param   key
+     *          Key to translate
+     * @return  Translatable component with the given key
+     */
+    @NotNull
+    public abstract T newTranslatableComponent(@NotNull String key);
+
+    /**
+     * Creates a new keybind component with given keybind.
+     *
+     * @param   keybind
+     *          Keybind to show
+     * @return  Keybind component with given keybind
+     */
+    @NotNull
+    public abstract T newKeybindComponent(@NotNull String keybind);
+
+    /**
+     * Creates a new object component with given atlas and sprite.
+     *
+     * @param sprite Sprite to use
+     * @return Object component with given atlas and sprite
+     */
+    @NotNull
+    public abstract T newObjectComponent(@NotNull TabAtlasSprite sprite);
+
+    /**
+     * Creates a new head component with given skin.
+     *
+     * @param   sprite
+     *          Skin to use
+     * @return  Head component with given skin
+     */
+    @NotNull
+    public abstract T newObjectComponent(@NotNull TabPlayerSprite sprite);
+
+    /**
+     * Converts given chat modifier to minecraft style and applies it to the component.
+     *
+     * @param   nmsComponent
+     *          Component to apply style to
+     * @param   style
+     *          Style to convert and apply
+     */
+    public abstract void applyStyle(@NotNull T nmsComponent, @NotNull TabStyle style);
+
+    /**
+     * Appends child to the given parent component.
+     *
+     * @param   parent
+     *          Parent to append the child to
+     * @param   child
+     *          Child component to append
+     */
+    public abstract void addSibling(@NotNull T parent, @NotNull T child);
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/provider/ImplementationProvider.java

@@ -0,0 +1,71 @@
+package me.neznamy.tab.platforms.bukkit.provider;
+
+import io.netty.channel.Channel;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.shared.platform.Scoreboard;
+import me.neznamy.tab.shared.platform.TabList;
+import me.neznamy.tab.shared.platform.TabListEntryTracker;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * An interface to provide platform-specific implementations of various features in various Minecraft versions.
+ */
+public interface ImplementationProvider {
+
+    /**
+     * Creates a new instance of scoreboard for the given player.
+     *
+     * @param   player
+     *          Player to create scoreboard for
+     * @return  Newly created scoreboard
+     */
+    @NotNull
+    Scoreboard newScoreboard(@NotNull BukkitTabPlayer player);
+
+    /**
+     * Creates a new instance of tab list for the given player.
+     *
+     * @param   player
+     *          Player to create tab list for
+     * @return  Newly created tab list
+     */
+    @NotNull
+    TabList newTabList(@NotNull BukkitTabPlayer player);
+
+    /**
+     * Returns component converter to be used for converting TAB components to NMS components.
+     *
+     * @return  Component converter
+     */
+    @NotNull
+    ComponentConverter<?> getComponentConverter();
+
+    /**
+     * Gets player's channel. If not available, returns {@code null}.
+     *
+     * @param   player
+     *          Player to get channel of
+     * @return  Player's channel or {@code null} if not supported
+     */
+    @Nullable
+    Channel getChannel(@NotNull Player player);
+
+    /**
+     * Creates a new instance of tab list entry tracker.
+     *
+     * @return  Newly created tab list entry tracker
+     */
+    @NotNull
+    TabListEntryTracker newTabListEntryTracker();
+
+    /**
+     * Returns ping of the given player.
+     *
+     * @param   player
+     *          Player to get ping of
+     * @return  Player's ping
+     */
+    int getPing(@NotNull BukkitTabPlayer player);
+}

bukkit/src/main/resources/plugin.yml

@@ -0,0 +1,101 @@
+main: me.neznamy.tab.platforms.bukkit.BukkitTAB
+name: @name@
+version: @version@
+description: @description@
+api-version: 1.13 # Defining to avoid legacy plugin warn
+load: POSTWORLD
+author: @author@
+website: "@website@"
+depend:
+  - LuckPerms
+softdepend: [PlaceholderAPI, LibsDisguises, ViaVersion, ViaRewind, floodgate]
+prefix: TAB
+folia-supported: true
+commands:
+  tab:
+    description: Plugin's main command
+permissions:
+  tab.admin:
+    description: Grants all TAB permissions
+    default: op
+  tab.tabcomplete:
+    description: Allows player to complete all TAB commands
+    default: op
+  tab.reload:
+    description: Allows player to run /tab reload
+    default: op
+  tab.cpu:
+    description: Allows player to run /tab cpu
+    default: op
+  tab.dump:
+    description: Allows player to run /tab dump <player>
+    default: op
+  tab.groupinfo:
+    description: Allows player to run /tab group <group>
+    default: op
+  tab.grouplist:
+    description: Allows player to run /tab groups
+    default: op
+  tab.parse:
+    description: Allows player to run /tab parse <player> <placeholder>
+    default: op
+  tab.setcollision:
+    description: Allows player to run /tab setcollision <player> <true/false>
+    default: op
+  tab.remove:
+    description: Allows player to remove group/user using commands
+    default: op
+  tab.change.*:
+    description: Allows player to change property using command
+    default: op
+  tab.announce.bar:
+    description: Allows player to run /tab bossbar announce
+    default: op
+  tab.bossbar.toggle:
+    description: Allows player to run /tab bossbar
+    default: op
+  tab.send.bar:
+    description: Allows player to run /tab bossbar send
+    default: op
+  tab.mysql.download:
+    description: Allows player to run /tab mysql download
+    default: op
+  tab.mysql.upload:
+    description: Allows player to run /tab mysql upload
+    default: op
+  tab.nametag.toggle:
+    description: Allows player to run /tab nametag toggle
+    default: op
+  tab.nametag.toggle.other:
+    description: Allows player to run /tab nametag toggle [other player]
+    default: op
+  tab.announce.scoreboard:
+    description: Allows player to run /tab scoreboard announce
+    default: op
+  tab.scoreboard.toggle:
+    description: Allows player to run /tab scoreboard
+    default: op
+  tab.scoreboard.toggle.other:
+    description: Allows player to run /tab scoreboard for other players
+    default: op
+  tab.scoreboard.show:
+    description: Allows player to run /tab scoreboard show
+    default: op
+  tab.scoreboard.show.other:
+    description: Allows player to run /tab scoreboard show for other players
+    default: op
+  tab.staff:
+    description: Makes player counted in %staffonline% placeholder
+    default: op
+  tab.group.*:
+    description: Considers player in group if assigning by permissions
+    default: op
+  tab.bypass:
+    description: Makes player bypass per world playerlist if bypass permission is enabled
+    default: op
+  tab.seevanished:
+    description: Marks player as able to see vanished players for features hooking into vanish plugins
+    default: op
+  tab.spectatorbypass:
+    description: Makes player bypass spectator fix
+    default: op

bukkit/v1_10_R1/build.gradle.kts

@@ -0,0 +1,4 @@
+dependencies {
+    implementation(projects.bukkit)
+    compileOnly("org.bukkit:craftbukkit:1.10.2-R0.1-SNAPSHOT")
+}

bukkit/v1_10_R1/src/main/java/me/neznamy/tab/platforms/bukkit/v1_10_R1/NMSComponentConverter.java

@@ -0,0 +1,62 @@
+package me.neznamy.tab.platforms.bukkit.v1_10_R1;
+
+import me.neznamy.tab.shared.chat.TabStyle;
+import me.neznamy.tab.shared.chat.component.object.TabAtlasSprite;
+import me.neznamy.tab.shared.chat.component.object.TabObjectComponent;
+import me.neznamy.tab.platforms.bukkit.provider.ComponentConverter;
+import me.neznamy.tab.shared.chat.component.object.TabPlayerSprite;
+import net.minecraft.server.v1_10_R1.*;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Component converter using direct NMS code.
+ */
+public class NMSComponentConverter extends ComponentConverter<IChatBaseComponent> {
+
+    @Override
+    @NotNull
+    public IChatBaseComponent newTextComponent(@NotNull String text) {
+        return new ChatComponentText(text);
+    }
+
+    @Override
+    @NotNull
+    public IChatBaseComponent newTranslatableComponent(@NotNull String key) {
+        return new ChatMessage(key);
+    }
+
+    @Override
+    @NotNull
+    public IChatBaseComponent newKeybindComponent(@NotNull String keybind) {
+        return new ChatComponentText("<Keybind components were added in 1.12>");
+    }
+
+    @Override
+    @NotNull
+    public IChatBaseComponent newObjectComponent(@NotNull TabAtlasSprite sprite) {
+        return new ChatComponentText(TabObjectComponent.ERROR_MESSAGE);
+    }
+
+    @Override
+    @NotNull
+    public IChatBaseComponent newObjectComponent(@NotNull TabPlayerSprite sprite) {
+        return new ChatComponentText(TabObjectComponent.ERROR_MESSAGE);
+    }
+
+    @Override
+    public void applyStyle(@NotNull IChatBaseComponent nmsComponent, @NotNull TabStyle modifier) {
+        nmsComponent.setChatModifier(new ChatModifier()
+                .setColor(modifier.getColor() == null ? null : EnumChatFormat.valueOf(modifier.getColor().getLegacyColor().name()))
+                .setBold(modifier.getBold())
+                .setItalic(modifier.getItalic())
+                .setUnderline(modifier.getUnderlined())
+                .setStrikethrough(modifier.getStrikethrough())
+                .setRandom(modifier.getObfuscated())
+        );
+    }
+
+    @Override
+    public void addSibling(@NotNull IChatBaseComponent parent, @NotNull IChatBaseComponent child) {
+        parent.addSibling(child);
+    }
+}

bukkit/v1_10_R1/src/main/java/me/neznamy/tab/platforms/bukkit/v1_10_R1/NMSImplementationProvider.java

@@ -0,0 +1,52 @@
+package me.neznamy.tab.platforms.bukkit.v1_10_R1;
+
+import io.netty.channel.Channel;
+import lombok.Getter;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.platforms.bukkit.provider.ComponentConverter;
+import me.neznamy.tab.platforms.bukkit.provider.ImplementationProvider;
+import me.neznamy.tab.shared.platform.Scoreboard;
+import me.neznamy.tab.shared.platform.TabList;
+import me.neznamy.tab.shared.platform.TabListEntryTracker;
+import org.bukkit.craftbukkit.v1_10_R1.entity.CraftPlayer;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Implementation provider using direct NMS code for 1.10.x.
+ */
+@Getter
+public class NMSImplementationProvider implements ImplementationProvider {
+
+    @NotNull
+    private final ComponentConverter<?> componentConverter = new NMSComponentConverter();
+    
+    @Override
+    @NotNull
+    public Scoreboard newScoreboard(@NotNull BukkitTabPlayer player) {
+        return new NMSPacketScoreboard(player);
+    }
+
+    @Override
+    @NotNull
+    public TabList newTabList(@NotNull BukkitTabPlayer player) {
+        return new NMSPacketTabList(player);
+    }
+
+    @Override
+    @NotNull
+    public Channel getChannel(@NotNull Player player) {
+        return ((CraftPlayer)player).getHandle().playerConnection.networkManager.channel;
+    }
+
+    @Override
+    @NotNull
+    public TabListEntryTracker newTabListEntryTracker() {
+        return new NMSTabListEntryTracker();
+    }
+
+    @Override
+    public int getPing(@NotNull BukkitTabPlayer player) {
+        return ((CraftPlayer)player.getPlayer()).getHandle().ping;
+    }
+}

bukkit/v1_10_R1/src/main/java/me/neznamy/tab/platforms/bukkit/v1_10_R1/NMSPacketScoreboard.java

@@ -0,0 +1,164 @@
+package me.neznamy.tab.platforms.bukkit.v1_10_R1;
+
+import lombok.NonNull;
+import lombok.SneakyThrows;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.shared.Limitations;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.platform.decorators.SafeScoreboard;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import net.minecraft.server.v1_10_R1.*;
+import org.bukkit.craftbukkit.v1_10_R1.entity.CraftPlayer;
+import org.jetbrains.annotations.NotNull;
+
+import java.lang.reflect.Field;
+import java.util.Collection;
+import java.util.Collections;
+
+/**
+ * Scoreboard implementation using direct NMS code.
+ */
+public class NMSPacketScoreboard extends SafeScoreboard<BukkitTabPlayer> {
+
+    private static final ScoreboardTeamBase.EnumNameTagVisibility[] visibilities = ScoreboardTeamBase.EnumNameTagVisibility.values();
+    private static final ScoreboardTeamBase.EnumTeamPush[] collisions = ScoreboardTeamBase.EnumTeamPush.values();
+    private static final Scoreboard dummyScoreboard = new Scoreboard();
+    private static final IScoreboardCriteria INTEGER = new ScoreboardBaseCriteria("dummy");
+    private static final IScoreboardCriteria HEARTS = new ScoreboardHealthCriteria("health");
+
+    private static final Field TeamPacket_NAME = ReflectionUtils.getFields(PacketPlayOutScoreboardTeam.class, String.class).get(0);
+    private static final Field TeamPacket_ACTION = ReflectionUtils.getInstanceFields(PacketPlayOutScoreboardTeam.class, int.class).get(1);
+    private static final Field TeamPacket_PLAYERS = ReflectionUtils.getOnlyField(PacketPlayOutScoreboardTeam.class, Collection.class);
+
+    private static final Field Objective_OBJECTIVE_NAME = ReflectionUtils.getFields(PacketPlayOutScoreboardObjective.class, String.class).get(0);
+    private static final Field Objective_METHOD = ReflectionUtils.getOnlyField(PacketPlayOutScoreboardObjective.class, int.class);
+
+    private static final Field DisplayObjective_OBJECTIVE_NAME = ReflectionUtils.getOnlyField(PacketPlayOutScoreboardDisplayObjective.class, String.class);
+    private static final Field DisplayObjective_POSITION = ReflectionUtils.getOnlyField(PacketPlayOutScoreboardDisplayObjective.class, int.class);
+
+    /**
+     * Constructs new instance with given player.
+     *
+     * @param   player
+     *          Player this scoreboard will belong to
+     */
+    public NMSPacketScoreboard(@NotNull BukkitTabPlayer player) {
+        super(player);
+    }
+
+    @Override
+    public void registerObjective(@NonNull Objective objective) {
+        IScoreboardCriteria healthDisplay = objective.getHealthDisplay() == HealthDisplay.INTEGER ? INTEGER : HEARTS;
+        ScoreboardObjective obj = new ScoreboardObjective(dummyScoreboard, objective.getName(), healthDisplay);
+        obj.setDisplayName(maybeCut(objective.getTitle().toLegacyText(), Limitations.SCOREBOARD_TITLE_PRE_1_13));
+        objective.setPlatformObjective(obj);
+        sendPacket(new PacketPlayOutScoreboardObjective(obj, ObjectiveAction.REGISTER));
+    }
+
+    @Override
+    public void setDisplaySlot(@NonNull Objective objective) {
+        sendPacket(new PacketPlayOutScoreboardDisplayObjective(objective.getDisplaySlot().ordinal(), (ScoreboardObjective) objective.getPlatformObjective()));
+    }
+
+    @Override
+    public void unregisterObjective(@NonNull Objective objective) {
+        sendPacket(new PacketPlayOutScoreboardObjective((ScoreboardObjective) objective.getPlatformObjective(), ObjectiveAction.UNREGISTER));
+    }
+
+    @Override
+    public void updateObjective(@NonNull Objective objective) {
+        IScoreboardCriteria healthDisplay = objective.getHealthDisplay() == HealthDisplay.INTEGER ? INTEGER : HEARTS;
+        ScoreboardObjective obj = new ScoreboardObjective(dummyScoreboard, objective.getName(), healthDisplay);
+        obj.setDisplayName(maybeCut(objective.getTitle().toLegacyText(), Limitations.SCOREBOARD_TITLE_PRE_1_13));
+        sendPacket(new PacketPlayOutScoreboardObjective(obj, ObjectiveAction.UPDATE));
+    }
+
+    @Override
+    public void setScore(@NonNull Score score) {
+        ScoreboardScore s = new ScoreboardScore(dummyScoreboard, (ScoreboardObjective) score.getObjective().getPlatformObjective(), score.getHolder());
+        s.setScore(score.getValue());
+        sendPacket(new PacketPlayOutScoreboardScore(s));
+    }
+
+    @Override
+    public void removeScore(@NonNull Score score) {
+        sendPacket(new PacketPlayOutScoreboardScore(score.getHolder()));
+    }
+
+    @Override
+    @NotNull
+    public Object createTeam(@NonNull String name) {
+        return new ScoreboardTeam(dummyScoreboard, name);
+    }
+
+    @Override
+    public void registerTeam(@NonNull Team team) {
+        updateTeamProperties(team);
+        ScoreboardTeam t = (ScoreboardTeam) team.getPlatformTeam();
+        t.getPlayerNameSet().addAll(team.getPlayers());
+        sendPacket(new PacketPlayOutScoreboardTeam(t, TeamAction.CREATE));
+    }
+
+    @Override
+    public void unregisterTeam(@NonNull Team team) {
+        sendPacket(new PacketPlayOutScoreboardTeam((ScoreboardTeam) team.getPlatformTeam(), TeamAction.REMOVE));
+    }
+
+    @Override
+    public void updateTeam(@NonNull Team team) {
+        updateTeamProperties(team);
+        sendPacket(new PacketPlayOutScoreboardTeam((ScoreboardTeam) team.getPlatformTeam(), TeamAction.UPDATE));
+    }
+
+    private void updateTeamProperties(@NonNull Team team) {
+        ScoreboardTeam t = (ScoreboardTeam) team.getPlatformTeam();
+        t.setAllowFriendlyFire((team.getOptions() & 0x01) != 0);
+        t.setCanSeeFriendlyInvisibles((team.getOptions() & 0x02) != 0);
+        t.setNameTagVisibility(visibilities[team.getVisibility().ordinal()]);
+        t.setCollisionRule(collisions[team.getCollision().ordinal()]);
+        t.setPrefix(maybeCut(team.getPrefix().toLegacyText(), Limitations.TEAM_PREFIX_SUFFIX_PRE_1_13));
+        t.setSuffix(maybeCut(team.getSuffix().toLegacyText(), Limitations.TEAM_PREFIX_SUFFIX_PRE_1_13));
+    }
+
+    @Override
+    @SneakyThrows
+    @SuppressWarnings("unchecked")
+    @NotNull
+    public Object onPacketSend(@NonNull Object packet) {
+        if (packet instanceof PacketPlayOutScoreboardDisplayObjective) {
+            TAB.getInstance().getFeatureManager().onDisplayObjective(player, DisplayObjective_POSITION.getInt(packet),
+                    (String) DisplayObjective_OBJECTIVE_NAME.get(packet));
+        }
+        if (packet instanceof PacketPlayOutScoreboardObjective) {
+            TAB.getInstance().getFeatureManager().onObjective(player,
+                    Objective_METHOD.getInt(packet), (String) Objective_OBJECTIVE_NAME.get(packet));
+        }
+        if (packet instanceof PacketPlayOutScoreboardTeam) {
+            int action = TeamPacket_ACTION.getInt(packet);
+            if (action != TeamAction.UPDATE) {
+                Collection<String> players = (Collection<String>) TeamPacket_PLAYERS.get(packet);
+                if (players == null) players = Collections.emptyList();
+                TeamPacket_PLAYERS.set(packet, onTeamPacket(action, (String) TeamPacket_NAME.get(packet), players));
+            }
+        }
+        return packet;
+    }
+
+    /**
+     * Sends the packet to the player.
+     *
+     * @param   packet
+     *          Packet to send
+     */
+    private void sendPacket(@NotNull Packet<?> packet) {
+        ((CraftPlayer)player.getPlayer()).getHandle().playerConnection.sendPacket(packet);
+    }
+
+    @NotNull
+    private String maybeCut(@NonNull String string, int length) {
+        if (player.getVersion().getMinorVersion() < 13 || TAB.getInstance().getConfiguration().getConfig().isPacketEventsCompensation()) {
+            return cutTo(string, length);
+        }
+        return string;
+    }
+}

bukkit/v1_10_R1/src/main/java/me/neznamy/tab/platforms/bukkit/v1_10_R1/NMSPacketTabList.java

@@ -0,0 +1,232 @@
+package me.neznamy.tab.platforms.bukkit.v1_10_R1;
+
+import com.mojang.authlib.GameProfile;
+import com.mojang.authlib.properties.Property;
+import lombok.NonNull;
+import lombok.SneakyThrows;
+import me.neznamy.tab.shared.chat.component.TabComponent;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.platform.TabList;
+import me.neznamy.tab.shared.platform.decorators.TrackedTabList;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import net.minecraft.server.v1_10_R1.*;
+import net.minecraft.server.v1_10_R1.PacketPlayOutPlayerInfo.EnumPlayerInfoAction;
+import org.bukkit.craftbukkit.v1_10_R1.entity.CraftPlayer;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Field;
+import java.util.*;
+
+/**
+ * TabList implementation using direct NMS code.
+ */
+public class NMSPacketTabList extends TrackedTabList<BukkitTabPlayer> {
+
+    // PlayerInfoData subclass is broken, using reflection to get it
+    private static final Class<?> PlayerInfoData = Arrays.stream(PacketPlayOutPlayerInfo.class.getDeclaredClasses()).filter(c -> !c.isEnum() && c.getConstructors().length > 0).findFirst().get();
+    private static final Constructor<?> newPlayerInfoData = ReflectionUtils.getOnlyConstructor(PlayerInfoData);
+
+    private static final Field ACTION = ReflectionUtils.getOnlyField(PacketPlayOutPlayerInfo.class, EnumPlayerInfoAction.class);
+    private static final Field PLAYERS = ReflectionUtils.getOnlyField(PacketPlayOutPlayerInfo.class, List.class);
+
+    private static final Field PlayerInfoData_Profile = ReflectionUtils.getOnlyField(PlayerInfoData, GameProfile.class);
+    private static final Field PlayerInfoData_Latency = ReflectionUtils.getFields(PlayerInfoData, int.class).get(0);
+    private static final Field PlayerInfoData_DisplayName = ReflectionUtils.getOnlyField(PlayerInfoData, IChatBaseComponent.class);
+    private static final Field PlayerInfoData_GameMode = ReflectionUtils.getOnlyField(PlayerInfoData, EnumGamemode.class);
+
+    private static final Field HEADER = ReflectionUtils.getFields(PacketPlayOutPlayerListHeaderFooter.class, IChatBaseComponent.class).get(0);
+    private static final Field FOOTER = ReflectionUtils.getFields(PacketPlayOutPlayerListHeaderFooter.class, IChatBaseComponent.class).get(1);
+
+    /**
+     * Constructs new instance.
+     *
+     * @param   player
+     *          Player this tablist will belong to
+     */
+    public NMSPacketTabList(@NotNull BukkitTabPlayer player) {
+        super(player);
+    }
+
+    @Override
+    @SneakyThrows
+    public void removeEntry(@NonNull UUID entry) {
+        sendPacket(EnumPlayerInfoAction.REMOVE_PLAYER, entry, "", null, 0, 0, null);
+    }
+
+    @Override
+    public void updateDisplayName0(@NonNull UUID entry, @Nullable TabComponent displayName) {
+        sendPacket(EnumPlayerInfoAction.UPDATE_DISPLAY_NAME, entry, "", null, 0, 0, displayName);
+    }
+
+    @Override
+    public void updateLatency(@NonNull UUID entry, int latency) {
+        sendPacket(EnumPlayerInfoAction.UPDATE_LATENCY, entry, "", null, latency, 0, null);
+    }
+
+    @Override
+    public void updateGameMode(@NonNull UUID entry, int gameMode) {
+        sendPacket(EnumPlayerInfoAction.UPDATE_GAME_MODE, entry, "", null, 0, gameMode, null);
+    }
+
+    @Override
+    public void updateListed(@NonNull UUID entry, boolean listed) {
+        // Added in 1.19.3
+    }
+
+    @Override
+    public void updateListOrder(@NonNull UUID entry, int listOrder) {
+        // Added in 1.21.2
+    }
+
+    @Override
+    public void updateHat(@NonNull UUID entry, boolean showHat) {
+        // Added in 1.21.4
+    }
+
+    @Override
+    public void addEntry0(@NonNull Entry entry) {
+        sendPacket(EnumPlayerInfoAction.ADD_PLAYER, entry.getUniqueId(), entry.getName(), entry.getSkin(), entry.getLatency(),
+                entry.getGameMode(), entry.getDisplayName());
+    }
+
+    @Override
+    public void setPlayerListHeaderFooter0(@NonNull TabComponent header, @NonNull TabComponent footer) {
+        sendPacket(newHeaderFooter(header, footer));
+    }
+
+    @Override
+    @Nullable
+    public Skin getSkin() {
+        Collection<Property> properties = ((CraftPlayer)player.getPlayer()).getProfile().getProperties().get(TEXTURES_PROPERTY);
+        if (properties.isEmpty()) return null; // Offline mode
+        Property property = properties.iterator().next();
+        return new Skin(property.getValue(), property.getSignature());
+    }
+
+    @NonNull
+    @SneakyThrows
+    private PacketPlayOutPlayerListHeaderFooter newHeaderFooter(@NotNull TabComponent header, @NonNull TabComponent footer) {
+        PacketPlayOutPlayerListHeaderFooter packet = new PacketPlayOutPlayerListHeaderFooter(header.convert());
+        FOOTER.set(packet, footer.convert());
+        return packet;
+    }
+
+    @Override
+    @SneakyThrows
+    @NotNull
+    @SuppressWarnings("unchecked")
+    public Object onPacketSend(@NonNull Object packet) {
+        if (packet instanceof PacketPlayOutPlayerListHeaderFooter) {
+            PacketPlayOutPlayerListHeaderFooter tablist = (PacketPlayOutPlayerListHeaderFooter) packet;
+            if (header == null || footer == null) return packet;
+            IChatBaseComponent header = (IChatBaseComponent) HEADER.get(tablist);
+            IChatBaseComponent footer = (IChatBaseComponent) FOOTER.get(tablist);
+            if (header != this.header.convert() || footer != this.footer.convert()) {
+                return newHeaderFooter(this.header, this.footer);
+            }
+        }
+        if (!(packet instanceof PacketPlayOutPlayerInfo)) return packet;
+        PacketPlayOutPlayerInfo info = (PacketPlayOutPlayerInfo) packet;
+        EnumPlayerInfoAction action = (EnumPlayerInfoAction) ACTION.get(info);
+        List<Object> updatedList = new ArrayList<>();
+        boolean rewritePacket = false;
+        for (Object nmsData : (List<Object>) PLAYERS.get(info)) {
+            boolean rewriteEntry = false;
+            GameProfile profile = (GameProfile) PlayerInfoData_Profile.get(nmsData);
+            UUID id = profile.getId();
+            IChatBaseComponent displayName = (IChatBaseComponent) PlayerInfoData_DisplayName.get(nmsData);
+            int latency = PlayerInfoData_Latency.getInt(nmsData);
+            int gameMode = ((EnumGamemode)PlayerInfoData_GameMode.get(nmsData)).getId();
+            if (action == EnumPlayerInfoAction.UPDATE_DISPLAY_NAME || action == EnumPlayerInfoAction.ADD_PLAYER) {
+                TabComponent forcedDisplayName = getForcedDisplayNames().get(id);
+                if (forcedDisplayName != null && forcedDisplayName.convert() != displayName) {
+                    displayName = forcedDisplayName.convert();
+                    rewriteEntry = rewritePacket = true;
+                }
+            }
+            if (action == EnumPlayerInfoAction.UPDATE_GAME_MODE || action == EnumPlayerInfoAction.ADD_PLAYER) {
+                if (getBlockedSpectators().contains(id) && gameMode == 3) {
+                    gameMode = 0;
+                    rewriteEntry = rewritePacket = true;
+                }
+            }
+            if (action == EnumPlayerInfoAction.UPDATE_LATENCY || action == EnumPlayerInfoAction.ADD_PLAYER) {
+                if (getForcedLatency() != null) {
+                    latency = getForcedLatency();
+                    rewriteEntry = rewritePacket = true;
+                }
+            }
+            if (action == EnumPlayerInfoAction.ADD_PLAYER) {
+                TAB.getInstance().getFeatureManager().onEntryAdd(player, id, profile.getName());
+            }
+            updatedList.add(rewriteEntry ? newPlayerInfoData(
+                    (PacketPlayOutPlayerInfo) packet,
+                    profile,
+                    latency,
+                    EnumGamemode.getById(gameMode),
+                    displayName
+            ) : nmsData);
+        }
+        if (rewritePacket) {
+            PacketPlayOutPlayerInfo newPacket = new PacketPlayOutPlayerInfo(action, Collections.emptyList());
+            PLAYERS.set(newPacket, updatedList);
+            return newPacket;
+        }
+        return packet;
+    }
+
+    @SneakyThrows
+    private void sendPacket(@NonNull EnumPlayerInfoAction action, @NonNull UUID id, @NonNull String name,
+                            @Nullable Skin skin, int latency, int gameMode, @Nullable TabComponent displayName) {
+        PacketPlayOutPlayerInfo packet = new PacketPlayOutPlayerInfo(action);
+        PLAYERS.set(packet, Collections.singletonList(newPlayerInfoData(
+                packet,
+                createProfile(id, name, skin),
+                latency,
+                EnumGamemode.getById(gameMode),
+                displayName == null ? null : displayName.convert())
+        ));
+        sendPacket(packet);
+    }
+
+    @NotNull
+    @SneakyThrows
+    private Object newPlayerInfoData(@NonNull PacketPlayOutPlayerInfo packet, @NonNull GameProfile profile,
+                                     int latency, @NonNull EnumGamemode gameMode, @Nullable IChatBaseComponent displayName) {
+        return newPlayerInfoData.newInstance(packet, profile, latency, gameMode, displayName);
+    }
+
+    /**
+     * Creates GameProfile from given parameters.
+     *
+     * @param   id
+     *          Profile ID
+     * @param   name
+     *          Profile name
+     * @param   skin
+     *          Player skin
+     * @return  GameProfile from given parameters
+     */
+    @NotNull
+    private GameProfile createProfile(@NonNull UUID id, @NonNull String name, @Nullable Skin skin) {
+        GameProfile profile = new GameProfile(id, name);
+        if (skin != null) {
+            profile.getProperties().put(TabList.TEXTURES_PROPERTY,
+                    new Property(TabList.TEXTURES_PROPERTY, skin.getValue(), skin.getSignature()));
+        }
+        return profile;
+    }
+
+    /**
+     * Sends the packet to the player.
+     *
+     * @param   packet
+     *          Packet to send
+     */
+    private void sendPacket(@NotNull Packet<?> packet) {
+        ((CraftPlayer)player.getPlayer()).getHandle().playerConnection.sendPacket(packet);
+    }
+}

bukkit/v1_10_R1/src/main/java/me/neznamy/tab/platforms/bukkit/v1_10_R1/NMSTabListEntryTracker.java

@@ -0,0 +1,43 @@
+package me.neznamy.tab.platforms.bukkit.v1_10_R1;
+
+import com.mojang.authlib.GameProfile;
+import lombok.SneakyThrows;
+import me.neznamy.tab.shared.platform.TabListEntryTracker;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import net.minecraft.server.v1_10_R1.PacketPlayOutPlayerInfo;
+import net.minecraft.server.v1_10_R1.PacketPlayOutPlayerInfo.EnumPlayerInfoAction;
+import org.jetbrains.annotations.NotNull;
+
+import java.lang.reflect.Field;
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * Implementation of TabListEntryTracker.
+ */
+public class NMSTabListEntryTracker extends TabListEntryTracker {
+
+    private static final Field ACTION = ReflectionUtils.getOnlyField(PacketPlayOutPlayerInfo.class, EnumPlayerInfoAction.class);
+    private static final Field PLAYERS = ReflectionUtils.getOnlyField(PacketPlayOutPlayerInfo.class, List.class);
+    private static final Class<?> PlayerInfoData = Arrays.stream(PacketPlayOutPlayerInfo.class.getDeclaredClasses()).filter(c -> !c.isEnum() && c.getConstructors().length > 0).findFirst().get();
+    private static final Field PlayerInfoData_Profile = ReflectionUtils.getOnlyField(PlayerInfoData, GameProfile.class);
+
+    @Override
+    @SneakyThrows
+    @SuppressWarnings("unchecked")
+    public void onPacketSend(@NotNull Object packet) {
+        if (packet instanceof PacketPlayOutPlayerInfo) {
+            PacketPlayOutPlayerInfo info = (PacketPlayOutPlayerInfo) packet;
+            EnumPlayerInfoAction action = (EnumPlayerInfoAction) ACTION.get(info);
+            for (Object nmsData : (List<Object>) PLAYERS.get(info)) {
+                GameProfile profile = (GameProfile) PlayerInfoData_Profile.get(nmsData);
+                if (action == EnumPlayerInfoAction.ADD_PLAYER) {
+                    tablistEntries.add(profile.getId());
+                }
+                if (action == EnumPlayerInfoAction.REMOVE_PLAYER) {
+                    tablistEntries.remove(profile.getId());
+                }
+            }
+        }
+    }
+}

bukkit/v1_11_R1/build.gradle.kts

@@ -0,0 +1,4 @@
+dependencies {
+    implementation(projects.bukkit)
+    compileOnly("org.bukkit:craftbukkit:1.11.2-R0.1-SNAPSHOT")
+}

bukkit/v1_11_R1/src/main/java/me/neznamy/tab/platforms/bukkit/v1_11_R1/NMSComponentConverter.java

@@ -0,0 +1,62 @@
+package me.neznamy.tab.platforms.bukkit.v1_11_R1;
+
+import me.neznamy.tab.shared.chat.TabStyle;
+import me.neznamy.tab.shared.chat.component.object.TabAtlasSprite;
+import me.neznamy.tab.shared.chat.component.object.TabObjectComponent;
+import me.neznamy.tab.platforms.bukkit.provider.ComponentConverter;
+import me.neznamy.tab.shared.chat.component.object.TabPlayerSprite;
+import net.minecraft.server.v1_11_R1.*;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Component converter using direct NMS code.
+ */
+public class NMSComponentConverter extends ComponentConverter<IChatBaseComponent> {
+
+    @Override
+    @NotNull
+    public IChatBaseComponent newTextComponent(@NotNull String text) {
+        return new ChatComponentText(text);
+    }
+
+    @Override
+    @NotNull
+    public IChatBaseComponent newTranslatableComponent(@NotNull String key) {
+        return new ChatMessage(key);
+    }
+
+    @Override
+    @NotNull
+    public IChatBaseComponent newKeybindComponent(@NotNull String keybind) {
+        return new ChatComponentText("<Keybind components were added in 1.12>");
+    }
+
+    @Override
+    @NotNull
+    public IChatBaseComponent newObjectComponent(@NotNull TabAtlasSprite sprite) {
+        return new ChatComponentText(TabObjectComponent.ERROR_MESSAGE);
+    }
+
+    @Override
+    @NotNull
+    public IChatBaseComponent newObjectComponent(@NotNull TabPlayerSprite sprite) {
+        return new ChatComponentText(TabObjectComponent.ERROR_MESSAGE);
+    }
+
+    @Override
+    public void applyStyle(@NotNull IChatBaseComponent nmsComponent, @NotNull TabStyle modifier) {
+        nmsComponent.setChatModifier(new ChatModifier()
+                .setColor(modifier.getColor() == null ? null : EnumChatFormat.valueOf(modifier.getColor().getLegacyColor().name()))
+                .setBold(modifier.getBold())
+                .setItalic(modifier.getItalic())
+                .setUnderline(modifier.getUnderlined())
+                .setStrikethrough(modifier.getStrikethrough())
+                .setRandom(modifier.getObfuscated())
+        );
+    }
+
+    @Override
+    public void addSibling(@NotNull IChatBaseComponent parent, @NotNull IChatBaseComponent child) {
+        parent.addSibling(child);
+    }
+}

bukkit/v1_11_R1/src/main/java/me/neznamy/tab/platforms/bukkit/v1_11_R1/NMSImplementationProvider.java

@@ -0,0 +1,52 @@
+package me.neznamy.tab.platforms.bukkit.v1_11_R1;
+
+import io.netty.channel.Channel;
+import lombok.Getter;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.platforms.bukkit.provider.ComponentConverter;
+import me.neznamy.tab.platforms.bukkit.provider.ImplementationProvider;
+import me.neznamy.tab.shared.platform.Scoreboard;
+import me.neznamy.tab.shared.platform.TabList;
+import me.neznamy.tab.shared.platform.TabListEntryTracker;
+import org.bukkit.craftbukkit.v1_11_R1.entity.CraftPlayer;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Implementation provider using direct NMS code for 1.11.x.
+ */
+@Getter
+public class NMSImplementationProvider implements ImplementationProvider {
+
+    @NotNull
+    private final ComponentConverter<?> componentConverter = new NMSComponentConverter();
+    
+    @Override
+    @NotNull
+    public Scoreboard newScoreboard(@NotNull BukkitTabPlayer player) {
+        return new NMSPacketScoreboard(player);
+    }
+
+    @Override
+    @NotNull
+    public TabList newTabList(@NotNull BukkitTabPlayer player) {
+        return new NMSPacketTabList(player);
+    }
+
+    @Override
+    @NotNull
+    public Channel getChannel(@NotNull Player player) {
+        return ((CraftPlayer)player).getHandle().playerConnection.networkManager.channel;
+    }
+
+    @Override
+    @NotNull
+    public TabListEntryTracker newTabListEntryTracker() {
+        return new NMSTabListEntryTracker();
+    }
+
+    @Override
+    public int getPing(@NotNull BukkitTabPlayer player) {
+        return ((CraftPlayer)player.getPlayer()).getHandle().ping;
+    }
+}

bukkit/v1_11_R1/src/main/java/me/neznamy/tab/platforms/bukkit/v1_11_R1/NMSPacketScoreboard.java

@@ -0,0 +1,164 @@
+package me.neznamy.tab.platforms.bukkit.v1_11_R1;
+
+import lombok.NonNull;
+import lombok.SneakyThrows;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.shared.Limitations;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.platform.decorators.SafeScoreboard;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import net.minecraft.server.v1_11_R1.*;
+import org.bukkit.craftbukkit.v1_11_R1.entity.CraftPlayer;
+import org.jetbrains.annotations.NotNull;
+
+import java.lang.reflect.Field;
+import java.util.Collection;
+import java.util.Collections;
+
+/**
+ * Scoreboard implementation using direct NMS code.
+ */
+public class NMSPacketScoreboard extends SafeScoreboard<BukkitTabPlayer> {
+
+    private static final ScoreboardTeamBase.EnumNameTagVisibility[] visibilities = ScoreboardTeamBase.EnumNameTagVisibility.values();
+    private static final ScoreboardTeamBase.EnumTeamPush[] collisions = ScoreboardTeamBase.EnumTeamPush.values();
+    private static final Scoreboard dummyScoreboard = new Scoreboard();
+    private static final IScoreboardCriteria INTEGER = new ScoreboardBaseCriteria("dummy");
+    private static final IScoreboardCriteria HEARTS = new ScoreboardHealthCriteria("health");
+
+    private static final Field TeamPacket_NAME = ReflectionUtils.getFields(PacketPlayOutScoreboardTeam.class, String.class).get(0);
+    private static final Field TeamPacket_ACTION = ReflectionUtils.getInstanceFields(PacketPlayOutScoreboardTeam.class, int.class).get(1);
+    private static final Field TeamPacket_PLAYERS = ReflectionUtils.getOnlyField(PacketPlayOutScoreboardTeam.class, Collection.class);
+
+    private static final Field Objective_OBJECTIVE_NAME = ReflectionUtils.getFields(PacketPlayOutScoreboardObjective.class, String.class).get(0);
+    private static final Field Objective_METHOD = ReflectionUtils.getOnlyField(PacketPlayOutScoreboardObjective.class, int.class);
+
+    private static final Field DisplayObjective_OBJECTIVE_NAME = ReflectionUtils.getOnlyField(PacketPlayOutScoreboardDisplayObjective.class, String.class);
+    private static final Field DisplayObjective_POSITION = ReflectionUtils.getOnlyField(PacketPlayOutScoreboardDisplayObjective.class, int.class);
+
+    /**
+     * Constructs new instance with given player.
+     *
+     * @param   player
+     *          Player this scoreboard will belong to
+     */
+    public NMSPacketScoreboard(@NotNull BukkitTabPlayer player) {
+        super(player);
+    }
+
+    @Override
+    public void registerObjective(@NonNull Objective objective) {
+        IScoreboardCriteria healthDisplay = objective.getHealthDisplay() == HealthDisplay.INTEGER ? INTEGER : HEARTS;
+        ScoreboardObjective obj = new ScoreboardObjective(dummyScoreboard, objective.getName(), healthDisplay);
+        obj.setDisplayName(maybeCut(objective.getTitle().toLegacyText(), Limitations.SCOREBOARD_TITLE_PRE_1_13));
+        objective.setPlatformObjective(obj);
+        sendPacket(new PacketPlayOutScoreboardObjective(obj, ObjectiveAction.REGISTER));
+    }
+
+    @Override
+    public void setDisplaySlot(@NonNull Objective objective) {
+        sendPacket(new PacketPlayOutScoreboardDisplayObjective(objective.getDisplaySlot().ordinal(), (ScoreboardObjective) objective.getPlatformObjective()));
+    }
+
+    @Override
+    public void unregisterObjective(@NonNull Objective objective) {
+        sendPacket(new PacketPlayOutScoreboardObjective((ScoreboardObjective) objective.getPlatformObjective(), ObjectiveAction.UNREGISTER));
+    }
+
+    @Override
+    public void updateObjective(@NonNull Objective objective) {
+        IScoreboardCriteria healthDisplay = objective.getHealthDisplay() == HealthDisplay.INTEGER ? INTEGER : HEARTS;
+        ScoreboardObjective obj = new ScoreboardObjective(dummyScoreboard, objective.getName(), healthDisplay);
+        obj.setDisplayName(maybeCut(objective.getTitle().toLegacyText(), Limitations.SCOREBOARD_TITLE_PRE_1_13));
+        sendPacket(new PacketPlayOutScoreboardObjective(obj, ObjectiveAction.UPDATE));
+    }
+
+    @Override
+    public void setScore(@NonNull Score score) {
+        ScoreboardScore s = new ScoreboardScore(dummyScoreboard, (ScoreboardObjective) score.getObjective().getPlatformObjective(), score.getHolder());
+        s.setScore(score.getValue());
+        sendPacket(new PacketPlayOutScoreboardScore(s));
+    }
+
+    @Override
+    public void removeScore(@NonNull Score score) {
+        sendPacket(new PacketPlayOutScoreboardScore(score.getHolder()));
+    }
+
+    @Override
+    @NotNull
+    public Object createTeam(@NonNull String name) {
+        return new ScoreboardTeam(dummyScoreboard, name);
+    }
+
+    @Override
+    public void registerTeam(@NonNull Team team) {
+        updateTeamProperties(team);
+        ScoreboardTeam t = (ScoreboardTeam) team.getPlatformTeam();
+        t.getPlayerNameSet().addAll(team.getPlayers());
+        sendPacket(new PacketPlayOutScoreboardTeam(t, TeamAction.CREATE));
+    }
+
+    @Override
+    public void unregisterTeam(@NonNull Team team) {
+        sendPacket(new PacketPlayOutScoreboardTeam((ScoreboardTeam) team.getPlatformTeam(), TeamAction.REMOVE));
+    }
+
+    @Override
+    public void updateTeam(@NonNull Team team) {
+        updateTeamProperties(team);
+        sendPacket(new PacketPlayOutScoreboardTeam((ScoreboardTeam) team.getPlatformTeam(), TeamAction.UPDATE));
+    }
+
+    private void updateTeamProperties(@NonNull Team team) {
+        ScoreboardTeam t = (ScoreboardTeam) team.getPlatformTeam();
+        t.setAllowFriendlyFire((team.getOptions() & 0x01) != 0);
+        t.setCanSeeFriendlyInvisibles((team.getOptions() & 0x02) != 0);
+        t.setNameTagVisibility(visibilities[team.getVisibility().ordinal()]);
+        t.setCollisionRule(collisions[team.getCollision().ordinal()]);
+        t.setPrefix(maybeCut(team.getPrefix().toLegacyText(), Limitations.TEAM_PREFIX_SUFFIX_PRE_1_13));
+        t.setSuffix(maybeCut(team.getSuffix().toLegacyText(), Limitations.TEAM_PREFIX_SUFFIX_PRE_1_13));
+    }
+
+    @Override
+    @SneakyThrows
+    @SuppressWarnings("unchecked")
+    @NotNull
+    public Object onPacketSend(@NonNull Object packet) {
+        if (packet instanceof PacketPlayOutScoreboardDisplayObjective) {
+            TAB.getInstance().getFeatureManager().onDisplayObjective(player, DisplayObjective_POSITION.getInt(packet),
+                    (String) DisplayObjective_OBJECTIVE_NAME.get(packet));
+        }
+        if (packet instanceof PacketPlayOutScoreboardObjective) {
+            TAB.getInstance().getFeatureManager().onObjective(player,
+                    Objective_METHOD.getInt(packet), (String) Objective_OBJECTIVE_NAME.get(packet));
+        }
+        if (packet instanceof PacketPlayOutScoreboardTeam) {
+            int action = TeamPacket_ACTION.getInt(packet);
+            if (action != TeamAction.UPDATE) {
+                Collection<String> players = (Collection<String>) TeamPacket_PLAYERS.get(packet);
+                if (players == null) players = Collections.emptyList();
+                TeamPacket_PLAYERS.set(packet, onTeamPacket(action, (String) TeamPacket_NAME.get(packet), players));
+            }
+        }
+        return packet;
+    }
+
+    /**
+     * Sends the packet to the player.
+     *
+     * @param   packet
+     *          Packet to send
+     */
+    private void sendPacket(@NotNull Packet<?> packet) {
+        ((CraftPlayer)player.getPlayer()).getHandle().playerConnection.sendPacket(packet);
+    }
+
+    @NotNull
+    private String maybeCut(@NonNull String string, int length) {
+        if (player.getVersion().getMinorVersion() < 13 || TAB.getInstance().getConfiguration().getConfig().isPacketEventsCompensation()) {
+            return cutTo(string, length);
+        }
+        return string;
+    }
+}