diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c58a6fea..4f1ee90c 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -27,6 +27,7 @@ jobs:
             11
             16
             17
+            21
           cache: 'gradle'
       - name: Build with Gradle
         run: ./gradlew clean spotlessCheck test build
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 36aa7872..6c3fd6e3 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -19,6 +19,7 @@ jobs:
             11
             16
             17
+            21
           cache: 'gradle'
       - name: Build with Gradle
         env:
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 0e1ae8ce..b82aa23a 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.7-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
diff --git a/implementations/fabric-1.20.5/build.gradle.kts b/implementations/fabric-1.20.5/build.gradle.kts
new file mode 100644
index 00000000..114cf5e0
--- /dev/null
+++ b/implementations/fabric-1.20.5/build.gradle.kts
@@ -0,0 +1,190 @@
+import com.matthewprenger.cursegradle.CurseArtifact
+import com.matthewprenger.cursegradle.CurseProject
+import com.matthewprenger.cursegradle.CurseRelation
+import com.matthewprenger.cursegradle.Options
+import net.fabricmc.loom.task.RemapJarTask
+
+plugins {
+	java
+	`java-library`
+	id("com.diffplug.spotless") version "6.1.2"
+	id ("com.github.node-gradle.node") version "3.0.1"
+	id ("com.github.johnrengelman.shadow") version "8.1.1"
+	id ("fabric-loom") version "1.6-SNAPSHOT"
+	id ("com.modrinth.minotaur") version "2.+"
+	id ("com.matthewprenger.cursegradle") version "1.4.0"
+}
+
+group = "de.bluecolored.bluemap.fabric"
+version = System.getProperty("bluemap.version") ?: "?" // set by BlueMapCore
+
+val javaTarget = 21
+java {
+	sourceCompatibility = JavaVersion.toVersion(javaTarget)
+	targetCompatibility = JavaVersion.toVersion(javaTarget)
+
+	withSourcesJar()
+}
+
+repositories {
+	mavenCentral()
+	maven {
+		setUrl("https://libraries.minecraft.net")
+	}
+	maven {
+		setUrl("https://jitpack.io")
+	}
+	maven {
+		setUrl("https://maven.fabricmc.net/")
+	}
+	maven {
+		setUrl("https://oss.sonatype.org/content/repositories/snapshots")
+	}
+}
+
+val shadowInclude: Configuration by configurations.creating
+
+configurations {
+	implementation.get().extendsFrom(shadowInclude)
+}
+
+dependencies {
+	shadowInclude ("de.bluecolored.bluemap.common:BlueMapCommon") {
+		//exclude dependencies provided by fabric
+		exclude (group = "com.google.guava", module = "guava")
+		exclude (group = "com.google.code.gson", module = "gson")
+		exclude (group = "org.apache.commons", module = "commons-lang3")
+		exclude (group = "commons-io", module = "commons-io")
+		exclude (group = "com.mojang", module = "brigadier")
+	}
+
+	minecraft ("com.mojang:minecraft:1.20.5")
+	mappings ("net.fabricmc:yarn:1.20.5+build.1")
+	modImplementation ("net.fabricmc:fabric-loader:0.15.10")
+	modImplementation ("net.fabricmc.fabric-api:fabric-api:0.97.8+1.20.5")
+	modImplementation("me.lucko:fabric-permissions-api:0.1-SNAPSHOT")
+
+	testImplementation ("org.junit.jupiter:junit-jupiter:5.9.0")
+	testRuntimeOnly ("org.junit.jupiter:junit-jupiter-engine:5.9.0")
+}
+
+spotless {
+	java {
+		target ("src/*/java/**/*.java")
+
+		licenseHeaderFile("../../HEADER")
+		indentWithSpaces()
+		trimTrailingWhitespace()
+	}
+}
+
+tasks.withType(JavaCompile::class).configureEach {
+	options.apply {
+		encoding = "utf-8"
+	}
+}
+
+tasks.withType(AbstractArchiveTask::class).configureEach {
+	isReproducibleFileOrder = true
+	isPreserveFileTimestamps = false
+}
+
+tasks.test {
+	useJUnitPlatform()
+}
+
+tasks.processResources {
+	inputs.property ("version", project.version)
+
+	filesMatching("fabric.mod.json") {
+		expand ("version" to project.version)
+	}
+}
+
+tasks.shadowJar {
+	configurations = listOf(shadowInclude)
+
+	//relocate ("com.flowpowered.math", "de.bluecolored.shadow.flowpowered.math") //DON"T relocate this, because the API depends on it
+	relocate ("com.typesafe.config", "de.bluecolored.shadow.typesafe.config")
+	relocate ("net.querz.nbt", "de.bluecolored.shadow.querz.nbt")
+	relocate ("org.spongepowered.configurate", "de.bluecolored.shadow.configurate")
+	relocate ("com.github.benmanes.caffeine", "de.bluecolored.shadow.benmanes.caffeine")
+	relocate ("org.aopalliance", "de.bluecolored.shadow.aopalliance")
+	relocate ("javax.inject", "de.bluecolored.shadow.javax.inject")
+	relocate ("org.checkerframework", "de.bluecolored.shadow.checkerframework")
+	relocate ("org.codehaus", "de.bluecolored.shadow.codehaus")
+	relocate ("io.leangen.geantyref", "de.bluecolored.shadow.geantyref")
+	relocate ("io.airlift", "de.bluecolored.shadow.airlift")
+
+	relocate ("com.google.errorprone", "de.bluecolored.shadow.google.errorprone")
+	relocate ("com.google.inject", "de.bluecolored.shadow.google.inject")
+
+	relocate ("org.apache.commons.dbcp2", "de.bluecolored.shadow.apache.commons.dbcp2")
+	relocate ("org.apache.commons.logging", "de.bluecolored.shadow.apache.commons.logging")
+	relocate ("org.apache.commons.pool2", "de.bluecolored.shadow.apache.commons.pool2")
+}
+
+tasks.register("remappedShadowJar", type = RemapJarTask::class) {
+	destinationDirectory.set(file("../../build/release"))
+	archiveFileName.set("BlueMap-${project.version}-${project.name}.jar")
+	dependsOn (tasks.shadowJar)
+	inputFile.set(tasks.shadowJar.get().archiveFile)
+	addNestedDependencies.set(true)
+}
+
+tasks.register("release") {
+	dependsOn("remappedShadowJar")
+}
+
+modrinth {
+	token.set(System.getenv("MODRINTH_TOKEN"))
+	projectId.set("swbUV1cr")
+	versionNumber.set("${project.version}-${project.name}")
+	changelog.set(file("../../release.md")
+		.readText()
+		.replace("{version}", project.version.toString()))
+	uploadFile.set(tasks.findByName("remappedShadowJar"))
+	gameVersions.addAll("1.20", "1.20.1", "1.20.2", "1.20.3", "1.20.4")
+	dependencies {
+		required.project("P7dR8mSH") // Fabric API
+	}
+}
+
+curseforge {
+	apiKey = System.getenv("CURSEFORGE_TOKEN") ?: ""
+	project(closureOf<CurseProject> {
+		id = "406463"
+		changelogType = "markdown"
+		changelog = file("../../release.md")
+			.readText()
+			.replace("{version}", project.version.toString())
+		releaseType = "release"
+
+		addGameVersion("Fabric")
+
+		addGameVersion("Java 18")
+		addGameVersion("Java 17")
+
+		addGameVersion("1.20")
+		addGameVersion("1.20.1")
+		addGameVersion("1.20.2")
+		addGameVersion("1.20.3")
+		addGameVersion("1.20.4")
+
+		mainArtifact(tasks.findByName("remappedShadowJar"), closureOf<CurseArtifact> {
+			relations(closureOf<CurseRelation> {
+				requiredDependency("fabric-api")
+			})
+		})
+	})
+	options(closureOf<Options> {
+		javaVersionAutoDetect = false
+		javaIntegration = false
+		forgeGradleIntegration = false
+	})
+}
+
+tasks.register("publish") {
+	dependsOn("modrinth")
+	dependsOn("curseforge")
+}
diff --git a/implementations/fabric-1.20.5/gradle/wrapper/gradle-wrapper.jar b/implementations/fabric-1.20.5/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 00000000..41d9927a
Binary files /dev/null and b/implementations/fabric-1.20.5/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/implementations/fabric-1.20.5/gradle/wrapper/gradle-wrapper.properties b/implementations/fabric-1.20.5/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 00000000..db9a6b82
--- /dev/null
+++ b/implementations/fabric-1.20.5/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.3-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/implementations/fabric-1.20.5/gradlew b/implementations/fabric-1.20.5/gradlew
new file mode 100644
index 00000000..1b6c7873
--- /dev/null
+++ b/implementations/fabric-1.20.5/gradlew
@@ -0,0 +1,234 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# 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
+#
+#      https://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.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+APP_NAME="Gradle"
+APP_BASE_NAME=${0##*/}
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
diff --git a/implementations/fabric-1.20.5/gradlew.bat b/implementations/fabric-1.20.5/gradlew.bat
new file mode 100644
index 00000000..107acd32
--- /dev/null
+++ b/implementations/fabric-1.20.5/gradlew.bat
@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/implementations/fabric-1.20.5/settings.gradle.kts b/implementations/fabric-1.20.5/settings.gradle.kts
new file mode 100644
index 00000000..3e4df316
--- /dev/null
+++ b/implementations/fabric-1.20.5/settings.gradle.kts
@@ -0,0 +1,13 @@
+pluginManagement {
+    repositories {
+        maven {
+            name = "Fabric"
+            url = uri("https://maven.fabricmc.net/")
+        }
+        gradlePluginPortal()
+    }
+}
+
+rootProject.name = "fabric-1.20.5"
+
+includeBuild("../../BlueMapCommon")
\ No newline at end of file
diff --git a/implementations/fabric-1.20.5/src/main/java/de/bluecolored/bluemap/fabric/FabricCommandSource.java b/implementations/fabric-1.20.5/src/main/java/de/bluecolored/bluemap/fabric/FabricCommandSource.java
new file mode 100644
index 00000000..a38e6eea
--- /dev/null
+++ b/implementations/fabric-1.20.5/src/main/java/de/bluecolored/bluemap/fabric/FabricCommandSource.java
@@ -0,0 +1,95 @@
+/*
+ * This file is part of BlueMap, licensed under the MIT License (MIT).
+ *
+ * Copyright (c) Blue (Lukas Rieger) <https://bluecolored.de>
+ * Copyright (c) contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package de.bluecolored.bluemap.fabric;
+
+import com.flowpowered.math.vector.Vector3d;
+import de.bluecolored.bluemap.common.plugin.Plugin;
+import de.bluecolored.bluemap.common.serverinterface.CommandSource;
+import de.bluecolored.bluemap.common.plugin.text.Text;
+import de.bluecolored.bluemap.core.world.World;
+import me.lucko.fabric.api.permissions.v0.Permissions;
+import net.minecraft.registry.BuiltinRegistries;
+import net.minecraft.registry.RegistryWrapper;
+import net.minecraft.server.command.ServerCommandSource;
+import net.minecraft.util.math.Vec3d;
+
+import java.io.IOException;
+import java.util.Optional;
+
+public class FabricCommandSource implements CommandSource {
+
+    private static final RegistryWrapper.WrapperLookup lookup = BuiltinRegistries.createWrapperLookup();
+
+    private final FabricMod mod;
+    private final Plugin plugin;
+    private final ServerCommandSource delegate;
+
+    public FabricCommandSource(FabricMod mod, Plugin plugin, ServerCommandSource delegate) {
+        this.mod = mod;
+        this.plugin = plugin;
+        this.delegate = delegate;
+    }
+
+    @Override
+    public void sendMessage(Text text) {
+        delegate.sendFeedback(
+                () -> net.minecraft.text.Text.Serialization
+                        .fromJson(text.toJSONString(), lookup),
+                false
+        );
+    }
+
+    @Override
+    public boolean hasPermission(String permission) {
+        try {
+            Class.forName("me.lucko.fabric.api.permissions.v0.Permissions");
+            return Permissions.check(delegate, permission, 1);
+        } catch (ClassNotFoundException ex) {
+            return delegate.hasPermissionLevel(1);
+        }
+    }
+
+    @Override
+    public Optional<Vector3d> getPosition() {
+        Vec3d pos = delegate.getPosition();
+        if (pos != null) {
+            return Optional.of(new Vector3d(pos.x, pos.y, pos.z));
+        }
+
+        return Optional.empty();
+    }
+
+    @Override
+    public Optional<World> getWorld() {
+        try {
+            var serverWorld = mod.getWorld(delegate.getWorld());
+            String worldId = plugin.getBlueMap().getWorldId(serverWorld.getSaveFolder());
+            return Optional.ofNullable(plugin.getWorlds().get(worldId));
+        } catch (IOException ignore) {}
+
+        return Optional.empty();
+    }
+
+}
diff --git a/implementations/fabric-1.20.5/src/main/java/de/bluecolored/bluemap/fabric/FabricEventForwarder.java b/implementations/fabric-1.20.5/src/main/java/de/bluecolored/bluemap/fabric/FabricEventForwarder.java
new file mode 100644
index 00000000..411e1c34
--- /dev/null
+++ b/implementations/fabric-1.20.5/src/main/java/de/bluecolored/bluemap/fabric/FabricEventForwarder.java
@@ -0,0 +1,76 @@
+/*
+ * This file is part of BlueMap, licensed under the MIT License (MIT).
+ *
+ * Copyright (c) Blue (Lukas Rieger) <https://bluecolored.de>
+ * Copyright (c) contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package de.bluecolored.bluemap.fabric;
+
+import de.bluecolored.bluemap.common.serverinterface.ServerEventListener;
+import net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.network.ServerPlayerEntity;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.UUID;
+
+public class FabricEventForwarder {
+
+    private final FabricMod mod;
+    private final Collection<ServerEventListener> eventListeners;
+
+    public FabricEventForwarder(FabricMod mod) {
+        this.mod = mod;
+        this.eventListeners = new ArrayList<>(1);
+
+        ServerPlayConnectionEvents.JOIN.register((handler, sender, server) -> {
+            this.onPlayerJoin(server, handler.getPlayer());
+        });
+
+        ServerPlayConnectionEvents.DISCONNECT.register((handler, server) -> {
+            this.onPlayerLeave(server, handler.getPlayer());
+        });
+    }
+
+    public synchronized void addEventListener(ServerEventListener listener) {
+        this.eventListeners.add(listener);
+    }
+
+    public synchronized void removeAllListeners() {
+        this.eventListeners.clear();
+    }
+
+    public synchronized void onPlayerJoin(MinecraftServer server, ServerPlayerEntity player) {
+        if (this.mod.getServer() != server) return;
+
+        UUID uuid = player.getUuid();
+        for (ServerEventListener listener : eventListeners) listener.onPlayerJoin(uuid);
+    }
+
+    public synchronized void onPlayerLeave(MinecraftServer server, ServerPlayerEntity player) {
+        if (this.mod.getServer() != server) return;
+
+        UUID uuid = player.getUuid();
+        for (ServerEventListener listener : eventListeners) listener.onPlayerLeave(uuid);
+    }
+
+}
diff --git a/implementations/fabric-1.20.5/src/main/java/de/bluecolored/bluemap/fabric/FabricMod.java b/implementations/fabric-1.20.5/src/main/java/de/bluecolored/bluemap/fabric/FabricMod.java
new file mode 100644
index 00000000..be254032
--- /dev/null
+++ b/implementations/fabric-1.20.5/src/main/java/de/bluecolored/bluemap/fabric/FabricMod.java
@@ -0,0 +1,253 @@
+/*
+ * This file is part of BlueMap, licensed under the MIT License (MIT).
+ *
+ * Copyright (c) Blue (Lukas Rieger) <https://bluecolored.de>
+ * Copyright (c) contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package de.bluecolored.bluemap.fabric;
+
+import com.github.benmanes.caffeine.cache.Caffeine;
+import com.github.benmanes.caffeine.cache.LoadingCache;
+import de.bluecolored.bluemap.common.plugin.Plugin;
+import de.bluecolored.bluemap.common.plugin.commands.Commands;
+import de.bluecolored.bluemap.common.serverinterface.Player;
+import de.bluecolored.bluemap.common.serverinterface.ServerEventListener;
+import de.bluecolored.bluemap.common.serverinterface.ServerInterface;
+import de.bluecolored.bluemap.common.serverinterface.ServerWorld;
+import de.bluecolored.bluemap.core.BlueMap;
+import de.bluecolored.bluemap.core.MinecraftVersion;
+import de.bluecolored.bluemap.core.logger.Logger;
+import net.fabricmc.api.ModInitializer;
+import net.fabricmc.fabric.api.command.v2.CommandRegistrationCallback;
+import net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents;
+import net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents;
+import net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents;
+import net.minecraft.SharedConstants;
+import net.minecraft.registry.RegistryKey;
+import net.minecraft.registry.RegistryKeys;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.network.ServerPlayerEntity;
+import net.minecraft.util.Identifier;
+import net.minecraft.world.World;
+import org.apache.logging.log4j.LogManager;
+
+import java.io.IOException;
+import java.nio.file.Path;
+import java.util.*;
+import java.util.concurrent.ConcurrentHashMap;
+
+public class FabricMod implements ModInitializer, ServerInterface {
+
+    private final Plugin pluginInstance;
+    private MinecraftServer serverInstance = null;
+
+    private final FabricEventForwarder eventForwarder;
+
+    private final LoadingCache<net.minecraft.server.world.ServerWorld, ServerWorld> worlds;
+
+    private int playerUpdateIndex = 0;
+    private final Map<UUID, Player> onlinePlayerMap;
+    private final List<FabricPlayer> onlinePlayerList;
+
+    public FabricMod() {
+        Logger.global.clear();
+        Logger.global.put(new Log4jLogger(LogManager.getLogger(Plugin.PLUGIN_NAME)));
+
+        this.onlinePlayerMap = new ConcurrentHashMap<>();
+        this.onlinePlayerList = Collections.synchronizedList(new ArrayList<>());
+
+        pluginInstance = new Plugin("fabric-1.20", this);
+
+        this.eventForwarder = new FabricEventForwarder(this);
+        this.worlds = Caffeine.newBuilder()
+                .executor(BlueMap.THREAD_POOL)
+                .weakKeys()
+                .maximumSize(1000)
+                .build(FabricWorld::new);
+    }
+
+    @Override
+    public void onInitialize() {
+
+        //register commands
+        CommandRegistrationCallback.EVENT.register((dispatcher, registryAccess, environment) ->
+                new Commands<>(pluginInstance, dispatcher, fabricSource ->
+                        new FabricCommandSource(this, pluginInstance, fabricSource)
+                )
+        );
+
+        ServerLifecycleEvents.SERVER_STARTED.register((MinecraftServer server) -> {
+            this.serverInstance = server;
+
+            new Thread(()->{
+                Logger.global.logInfo("Loading BlueMap...");
+
+                try {
+                    pluginInstance.load();
+                    if (pluginInstance.isLoaded()) Logger.global.logInfo("BlueMap loaded!");
+                } catch (IOException e) {
+                    Logger.global.logError("Failed to load bluemap!", e);
+                    pluginInstance.unload();
+                }
+            }, "BlueMap-Plugin-Loading").start();
+        });
+
+        ServerLifecycleEvents.SERVER_STOPPING.register((MinecraftServer server) -> {
+            pluginInstance.unload();
+            Logger.global.logInfo("BlueMap unloaded!");
+        });
+
+        ServerPlayConnectionEvents.JOIN.register((handler, sender, server) -> {
+            this.onPlayerJoin(server, handler.getPlayer());
+        });
+
+        ServerPlayConnectionEvents.DISCONNECT.register((handler, server) -> {
+            this.onPlayerLeave(server, handler.getPlayer());
+        });
+
+        ServerTickEvents.END_SERVER_TICK.register((MinecraftServer server) -> {
+            if (server == this.serverInstance) this.updateSomePlayers();
+        });
+    }
+
+    @Override
+    public MinecraftVersion getMinecraftVersion() {
+        try {
+            return MinecraftVersion.of(SharedConstants.getGameVersion().getId());
+        } catch (IllegalArgumentException ex) {
+            return MinecraftVersion.LATEST_SUPPORTED;
+        }
+    }
+
+    @Override
+    public void registerListener(ServerEventListener listener) {
+        eventForwarder.addEventListener(listener);
+    }
+
+    @Override
+    public void unregisterAllListeners() {
+        eventForwarder.removeAllListeners();
+    }
+
+    @Override
+    public Collection<ServerWorld> getLoadedWorlds() {
+        Collection<ServerWorld> loadedWorlds = new ArrayList<>(3);
+        for (net.minecraft.server.world.ServerWorld serverWorld : serverInstance.getWorlds()) {
+            loadedWorlds.add(worlds.get(serverWorld));
+        }
+        return loadedWorlds;
+    }
+
+    @SuppressWarnings("unchecked")
+    @Override
+    public Optional<ServerWorld> getWorld(Object world) {
+        if (world instanceof Path)
+            return getWorld((Path) world);
+
+        if (world instanceof String) {
+            Identifier identifier = Identifier.tryParse((String) world);
+            if (identifier != null) world = serverInstance.getWorld(RegistryKey.of(RegistryKeys.WORLD, identifier));
+        }
+
+        if (world instanceof RegistryKey) {
+            try {
+                world = serverInstance.getWorld((RegistryKey<World>) world);
+            } catch (ClassCastException ignored) {}
+        }
+
+        if (world instanceof net.minecraft.server.world.ServerWorld)
+            return Optional.of(getWorld((net.minecraft.server.world.ServerWorld) world));
+
+        return Optional.empty();
+    }
+
+    public ServerWorld getWorld(net.minecraft.server.world.ServerWorld serverWorld) {
+        return worlds.get(serverWorld);
+    }
+
+    @Override
+    public Path getConfigFolder() {
+        return Path.of("config", "bluemap");
+    }
+
+    @Override
+    public Optional<Path> getModsFolder() {
+        return Optional.of(Path.of("mods"));
+    }
+
+    public void onPlayerJoin(MinecraftServer server, ServerPlayerEntity playerInstance) {
+        if (this.serverInstance != server) return;
+
+        FabricPlayer player = new FabricPlayer(playerInstance.getUuid(), this);
+        onlinePlayerMap.put(player.getUuid(), player);
+        onlinePlayerList.add(player);
+    }
+
+    public void onPlayerLeave(MinecraftServer server, ServerPlayerEntity player) {
+        if (this.serverInstance != server) return;
+
+        UUID playerUUID = player.getUuid();
+        onlinePlayerMap.remove(playerUUID);
+        synchronized (onlinePlayerList) {
+            onlinePlayerList.removeIf(p -> p.getUuid().equals(playerUUID));
+        }
+    }
+
+    public MinecraftServer getServer() {
+        return this.serverInstance;
+    }
+
+    public Plugin getPluginInstance() {
+        return pluginInstance;
+    }
+
+    @Override
+    public Collection<Player> getOnlinePlayers() {
+        return onlinePlayerMap.values();
+    }
+
+    @Override
+    public Optional<Player> getPlayer(UUID uuid) {
+        return Optional.ofNullable(onlinePlayerMap.get(uuid));
+    }
+
+    /**
+     * Only update some of the online players each tick to minimize performance impact on the server-thread.
+     * Only call this method on the server-thread.
+     */
+    private void updateSomePlayers() {
+        int onlinePlayerCount = onlinePlayerList.size();
+        if (onlinePlayerCount == 0) return;
+
+        int playersToBeUpdated = onlinePlayerCount / 20; //with 20 tps, each player is updated once a second
+        if (playersToBeUpdated == 0) playersToBeUpdated = 1;
+
+        for (int i = 0; i < playersToBeUpdated; i++) {
+            playerUpdateIndex++;
+            if (playerUpdateIndex >= 20 && playerUpdateIndex >= onlinePlayerCount) playerUpdateIndex = 0;
+
+            if (playerUpdateIndex < onlinePlayerCount) {
+                onlinePlayerList.get(playerUpdateIndex).update();
+            }
+        }
+    }
+
+}
diff --git a/implementations/fabric-1.20.5/src/main/java/de/bluecolored/bluemap/fabric/FabricPlayer.java b/implementations/fabric-1.20.5/src/main/java/de/bluecolored/bluemap/fabric/FabricPlayer.java
new file mode 100644
index 00000000..39b5ee53
--- /dev/null
+++ b/implementations/fabric-1.20.5/src/main/java/de/bluecolored/bluemap/fabric/FabricPlayer.java
@@ -0,0 +1,171 @@
+/*
+ * This file is part of BlueMap, licensed under the MIT License (MIT).
+ *
+ * Copyright (c) Blue (Lukas Rieger) <https://bluecolored.de>
+ * Copyright (c) contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package de.bluecolored.bluemap.fabric;
+
+import com.flowpowered.math.vector.Vector3d;
+import de.bluecolored.bluemap.common.plugin.text.Text;
+import de.bluecolored.bluemap.common.serverinterface.Gamemode;
+import de.bluecolored.bluemap.common.serverinterface.Player;
+import net.minecraft.entity.effect.StatusEffectInstance;
+import net.minecraft.entity.effect.StatusEffects;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.network.ServerPlayerEntity;
+import net.minecraft.util.math.Vec3d;
+import net.minecraft.world.GameMode;
+import net.minecraft.world.LightType;
+
+import java.io.IOException;
+import java.util.EnumMap;
+import java.util.Map;
+import java.util.UUID;
+
+public class FabricPlayer implements Player {
+
+    private static final Map<GameMode, Gamemode> GAMEMODE_MAP = new EnumMap<>(GameMode.class);
+    static {
+        GAMEMODE_MAP.put(GameMode.ADVENTURE, Gamemode.ADVENTURE);
+        GAMEMODE_MAP.put(GameMode.SURVIVAL, Gamemode.SURVIVAL);
+        GAMEMODE_MAP.put(GameMode.CREATIVE, Gamemode.CREATIVE);
+        GAMEMODE_MAP.put(GameMode.SPECTATOR, Gamemode.SPECTATOR);
+    }
+
+    private final UUID uuid;
+    private Text name;
+    private String world;
+    private Vector3d position;
+    private Vector3d rotation;
+    private int skyLight;
+    private int blockLight;
+    private boolean online;
+    private boolean sneaking;
+    private boolean invisible;
+    private Gamemode gamemode;
+
+    private final FabricMod mod;
+
+    public FabricPlayer(UUID playerUuid, FabricMod mod) {
+        this.uuid = playerUuid;
+        this.mod = mod;
+
+        update();
+    }
+
+    @Override
+    public UUID getUuid() {
+        return this.uuid;
+    }
+
+    @Override
+    public Text getName() {
+        return this.name;
+    }
+
+    @Override
+    public String getWorld() {
+        return this.world;
+    }
+
+    @Override
+    public Vector3d getPosition() {
+        return this.position;
+    }
+
+    @Override
+    public Vector3d getRotation() {
+        return rotation;
+    }
+
+    @Override
+    public int getSkyLight() {
+        return skyLight;
+    }
+
+    @Override
+    public int getBlockLight() {
+        return blockLight;
+    }
+
+    @Override
+    public boolean isOnline() {
+        return this.online;
+    }
+
+    @Override
+    public boolean isSneaking() {
+        return this.sneaking;
+    }
+
+    @Override
+    public boolean isInvisible() {
+        return this.invisible;
+    }
+
+    @Override
+    public Gamemode getGamemode() {
+        return this.gamemode;
+    }
+
+    /**
+     * Only call on server thread!
+     */
+    public void update() {
+        MinecraftServer server = mod.getServer();
+        if (server == null) {
+            this.online = false;
+            return;
+        }
+
+        ServerPlayerEntity player = server.getPlayerManager().getPlayer(uuid);
+        if (player == null) {
+            this.online = false;
+            return;
+        }
+
+        this.gamemode = GAMEMODE_MAP.get(player.interactionManager.getGameMode());
+        if (this.gamemode == null) this.gamemode = Gamemode.SURVIVAL;
+
+        StatusEffectInstance invis = player.getStatusEffect(StatusEffects.INVISIBILITY);
+        this.invisible = invis != null && invis.getDuration() > 0;
+
+        this.name = Text.of(player.getName().getString());
+        this.online = true;
+
+        Vec3d pos = player.getPos();
+        this.position = new Vector3d(pos.getX(), pos.getY(), pos.getZ());
+        this.rotation = new Vector3d(player.getPitch(), player.getHeadYaw(), 0);
+        this.sneaking = player.isSneaking();
+
+        this.skyLight = player.getWorld().getLightingProvider().get(LightType.SKY).getLightLevel(player.getBlockPos());
+        this.blockLight = player.getWorld().getLightingProvider().get(LightType.BLOCK).getLightLevel(player.getBlockPos());
+
+        try {
+            var world = mod.getWorld(player.getWorld()).orElse(null);
+            this.world = world != null ? mod.getPluginInstance().getBlueMap().getWorldId(world.getSaveFolder()) : "unknown";
+        } catch (IOException | NullPointerException e) { // NullPointerException -> the plugin isn't fully loaded
+            this.world = "unknown";
+        }
+    }
+
+}
diff --git a/implementations/fabric-1.20.5/src/main/java/de/bluecolored/bluemap/fabric/FabricWorld.java b/implementations/fabric-1.20.5/src/main/java/de/bluecolored/bluemap/fabric/FabricWorld.java
new file mode 100644
index 00000000..6647b152
--- /dev/null
+++ b/implementations/fabric-1.20.5/src/main/java/de/bluecolored/bluemap/fabric/FabricWorld.java
@@ -0,0 +1,99 @@
+/*
+ * This file is part of BlueMap, licensed under the MIT License (MIT).
+ *
+ * Copyright (c) Blue (Lukas Rieger) <https://bluecolored.de>
+ * Copyright (c) contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package de.bluecolored.bluemap.fabric;
+
+import de.bluecolored.bluemap.common.serverinterface.Dimension;
+import de.bluecolored.bluemap.common.serverinterface.ServerWorld;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.util.WorldSavePath;
+import net.minecraft.world.World;
+import net.minecraft.world.dimension.DimensionType;
+
+import java.io.IOException;
+import java.lang.ref.WeakReference;
+import java.nio.file.Path;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionException;
+import java.util.concurrent.ExecutionException;
+
+public class FabricWorld implements ServerWorld {
+
+    private final WeakReference<net.minecraft.server.world.ServerWorld> delegate;
+    private final Path saveFolder;
+
+    public FabricWorld(net.minecraft.server.world.ServerWorld delegate) {
+        this.delegate = new WeakReference<>(delegate);
+
+        MinecraftServer server = delegate.getServer();
+        Path worldFolder = delegate.getServer().getRunDirectory().toPath().resolve(server.getSavePath(WorldSavePath.ROOT));
+        this.saveFolder = DimensionType.getSaveDirectory(delegate.getRegistryKey(), worldFolder)
+                .toAbsolutePath().normalize();
+    }
+
+    @Override
+    public Dimension getDimension() {
+        net.minecraft.server.world.ServerWorld world = delegate.get();
+        if (world != null) {
+            if (world.getRegistryKey().equals(World.NETHER)) return Dimension.NETHER;
+            if (world.getRegistryKey().equals(World.END)) return Dimension.END;
+            if (world.getRegistryKey().equals(World.OVERWORLD)) return Dimension.OVERWORLD;
+        }
+
+        return ServerWorld.super.getDimension();
+    }
+
+    @Override
+    public boolean persistWorldChanges() throws IOException {
+        net.minecraft.server.world.ServerWorld world = delegate.get();
+        if (world == null) return false;
+
+        var taskResult = CompletableFuture.supplyAsync(() -> {
+            try {
+                world.save(null, true, false);
+                return true;
+            } catch (Exception e) {
+                throw new CompletionException(e);
+            }
+        }, world.getServer());
+
+        try {
+            return taskResult.get();
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+            throw new IOException(e);
+        } catch (ExecutionException e) {
+            Throwable t = e.getCause();
+            if (t instanceof IOException) throw (IOException) t;
+            if (t instanceof IllegalArgumentException) throw (IllegalArgumentException) t;
+            throw new IOException(t);
+        }
+    }
+
+    @Override
+    public Path getSaveFolder() {
+        return this.saveFolder;
+    }
+
+}
diff --git a/implementations/fabric-1.20.5/src/main/java/de/bluecolored/bluemap/fabric/Log4jLogger.java b/implementations/fabric-1.20.5/src/main/java/de/bluecolored/bluemap/fabric/Log4jLogger.java
new file mode 100644
index 00000000..9e60f395
--- /dev/null
+++ b/implementations/fabric-1.20.5/src/main/java/de/bluecolored/bluemap/fabric/Log4jLogger.java
@@ -0,0 +1,69 @@
+/*
+ * This file is part of BlueMap, licensed under the MIT License (MIT).
+ *
+ * Copyright (c) Blue (Lukas Rieger) <https://bluecolored.de>
+ * Copyright (c) contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package de.bluecolored.bluemap.fabric;
+
+import org.apache.logging.log4j.Logger;
+
+import de.bluecolored.bluemap.core.logger.AbstractLogger;
+
+public class Log4jLogger extends AbstractLogger {
+
+    private final Logger out;
+
+    public Log4jLogger(Logger out) {
+        this.out = out;
+    }
+
+    @Override
+    public void logError(String message, Throwable throwable) {
+        out.error(message, throwable);
+    }
+
+    @Override
+    public void logWarning(String message) {
+        out.warn(message);
+    }
+
+    @Override
+    public void logInfo(String message) {
+        out.info(message);
+    }
+
+    @Override
+    public void logDebug(String message) {
+        if (out.isDebugEnabled()) out.debug(message);
+    }
+
+    @Override
+    public void noFloodDebug(String message) {
+        if (out.isDebugEnabled()) super.noFloodDebug(message);
+    }
+
+    @Override
+    public void noFloodDebug(String key, String message) {
+        if (out.isDebugEnabled()) super.noFloodDebug(key, message);
+    }
+
+}
diff --git a/implementations/fabric-1.20.5/src/main/resources/assets/bluemap/icon.png b/implementations/fabric-1.20.5/src/main/resources/assets/bluemap/icon.png
new file mode 100644
index 00000000..65d56d7a
Binary files /dev/null and b/implementations/fabric-1.20.5/src/main/resources/assets/bluemap/icon.png differ
diff --git a/implementations/fabric-1.20.5/src/main/resources/fabric.mod.json b/implementations/fabric-1.20.5/src/main/resources/fabric.mod.json
new file mode 100644
index 00000000..673dd6bd
--- /dev/null
+++ b/implementations/fabric-1.20.5/src/main/resources/fabric.mod.json
@@ -0,0 +1,33 @@
+{
+  "schemaVersion": 1,
+  "id": "bluemap",
+  "version": "${version}",
+
+  "name": "BlueMap",
+  "description": "A 3d-map of your Minecraft worlds view-able in your browser using three.js (WebGL)",
+  "authors": [
+    "Blue (TBlueF, Lukas Rieger)"
+  ],
+  "contact": {
+    "homepage": "https://github.com/BlueMap-Minecraft",
+    "sources": "https://github.com/BlueMap-Minecraft/BlueMap"
+  },
+
+  "license": "MIT",
+  "icon": "assets/bluemap/icon.png",
+
+  "environment": "*",
+  "entrypoints": {
+    "main": [
+      "de.bluecolored.bluemap.fabric.FabricMod"
+    ]
+  },
+
+  "depends": {
+    "fabricloader": ">=0.14.21",
+    "fabric": "*",
+    "fabric-api-base": "*",
+    "minecraft": "*"
+  },
+  "suggests": {}
+}
diff --git a/implementations/paper/build.gradle.kts b/implementations/paper/build.gradle.kts
index eeaac699..20d29812 100644
--- a/implementations/paper/build.gradle.kts
+++ b/implementations/paper/build.gradle.kts
@@ -5,7 +5,7 @@ plugins {
 	id ("com.github.node-gradle.node") version "3.0.1"
 	id ("com.github.johnrengelman.shadow") version "7.1.2"
 	id ("com.modrinth.minotaur") version "2.+"
-	id ("io.papermc.hangar-publish-plugin") version "0.1.0"
+	id ("io.papermc.hangar-publish-plugin") version "0.1.2"
 }
 
 group = "de.bluecolored.bluemap.bukkit"
diff --git a/settings.gradle.kts b/settings.gradle.kts
index 2596e967..259e2767 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -5,23 +5,24 @@ val releaseNotesFile = file("release.md")
 if (!releaseNotesFile.exists()) releaseNotesFile.createNewFile();
 
 // implementations
-includeBuild("implementations/cli")
+//includeBuild("implementations/cli")
 
-includeBuild("implementations/fabric-1.15.2")
-includeBuild("implementations/fabric-1.16.2")
-includeBuild("implementations/fabric-1.17")
-includeBuild("implementations/fabric-1.18")
-includeBuild("implementations/fabric-1.19.4")
-includeBuild("implementations/fabric-1.20")
+//includeBuild("implementations/fabric-1.15.2")
+//includeBuild("implementations/fabric-1.16.2")
+//includeBuild("implementations/fabric-1.17")
+//includeBuild("implementations/fabric-1.18")
+//includeBuild("implementations/fabric-1.19.4")
+//includeBuild("implementations/fabric-1.20")
+includeBuild("implementations/fabric-1.20.5")
 
-includeBuild("implementations/forge-1.17.1")
-includeBuild("implementations/forge-1.18.1")
-includeBuild("implementations/forge-1.19.4")
-includeBuild("implementations/forge-1.20")
+//includeBuild("implementations/forge-1.17.1")
+//includeBuild("implementations/forge-1.18.1")
+//includeBuild("implementations/forge-1.19.4")
+//includeBuild("implementations/forge-1.20")
 
-includeBuild("implementations/neoforge-1.20.2")
+//includeBuild("implementations/neoforge-1.20.2")
 
-includeBuild("implementations/spigot")
-includeBuild("implementations/paper")
+//includeBuild("implementations/spigot")
+//includeBuild("implementations/paper")
 
-includeBuild("implementations/sponge")
+//includeBuild("implementations/sponge")