diff --git a/common/.classpath b/common/.classpath
new file mode 100644
index 0000000..0a3280e
--- /dev/null
+++ b/common/.classpath
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-21/"/>
+	<classpathentry kind="con" path="org.eclipse.buildship.core.gradleclasspathcontainer"/>
+	<classpathentry kind="output" path="bin/default"/>
+</classpath>
diff --git a/common/build.gradle.kts b/common/build.gradle.kts
new file mode 100644
index 0000000..8b3e9d3
--- /dev/null
+++ b/common/build.gradle.kts
@@ -0,0 +1,17 @@
+plugins {
+    `java-library`
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation("com.google.code.gson:gson:2.10.1")
+}
+
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(21)
+    }
+}
diff --git a/common/src/online/mineroo/common/ProtocolConstants.java b/common/src/online/mineroo/common/ProtocolConstants.java
new file mode 100644
index 0000000..7b62d9d
--- /dev/null
+++ b/common/src/online/mineroo/common/ProtocolConstants.java
@@ -0,0 +1,4 @@
+package online.mineroo.common;
+
+public class ProtocolConstants {
+}
diff --git a/kls_database.db b/kls_database.db
index c65e824..2ea29d5 100644
Binary files a/kls_database.db and b/kls_database.db differ
diff --git a/settings.gradle.kts b/settings.gradle.kts
index c375537..7435f06 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -10,5 +10,7 @@ plugins {
     id("org.gradle.toolchains.foojay-resolver-convention") version "1.0.0"
 }
 
-rootProject.name = "mineroo-velocity"
+rootProject.name = "mineroo-minecraft-libraries"
+
+include("common")
 include("velocity")