diff --git a/.gitignore b/.gitignore
index f62046d..dbb1822 100644
--- a/.gitignore
+++ b/.gitignore
@@ -68,3 +68,6 @@ api_docs/
 
 # Project documentation (local only)
 TODO.md
+
+# Compiled output
+bin/
diff --git a/build.gradle.kts b/build.gradle.kts
index d659488..65d7121 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -2,6 +2,7 @@ plugins {
     id("java")
     id("io.github.goooler.shadow") version("8.1.8")
     id("xyz.jpenilla.run-paper") version("3.0.2")
+    checkstyle
 }
 
 group = "dev.loki"
@@ -168,5 +169,20 @@ tasks {
     }
 }
 
+checkstyle {
+    toolVersion = "10.21.4"
+    configFile = file("config/checkstyle/checkstyle.xml")
+    isIgnoreFailures = false
+    maxErrors = 0
+    maxWarnings = 0
+}
+
+tasks.withType<Checkstyle>().configureEach {
+    reports {
+        xml.required.set(true)
+        html.required.set(true)
+    }
+}
+
 // Default task
 defaultTasks("clean", "build")
diff --git a/config/checkstyle/checkstyle.xml b/config/checkstyle/checkstyle.xml
new file mode 100644
index 0000000..a3a9089
--- /dev/null
+++ b/config/checkstyle/checkstyle.xml
@@ -0,0 +1,89 @@
+<?xml version="1.0"?>
+<!DOCTYPE module PUBLIC
+    "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
+    "https://checkstyle.org/dtds/configuration_1_3.dtd">
+
+<module name="Checker">
+    <property name="charset" value="UTF-8"/>
+    <property name="severity" value="error"/>
+    <property name="fileExtensions" value="java"/>
+
+    <module name="BeforeExecutionExclusionFileFilter">
+        <property name="fileNamePattern" value=".*[\\/]src[\\/]test[\\/].*"/>
+    </module>
+
+    <module name="SuppressWarningsFilter"/>
+
+    <module name="LineLength">
+        <property name="max" value="150"/>
+        <property name="ignorePattern"
+            value="^package.*|^import.*|a href|href|http://|https://|ftp://"/>
+    </module>
+
+    <module name="TreeWalker">
+        <module name="SuppressWarningsHolder"/>
+
+        <module name="MethodLength">
+            <property name="max" value="80"/>
+            <property name="countEmpty" value="false"/>
+        </module>
+
+        <module name="CyclomaticComplexity">
+            <property name="max" value="20"/>
+        </module>
+
+        <module name="ParameterNumber">
+            <property name="max" value="7"/>
+        </module>
+
+        <module name="AvoidStarImport"/>
+        <module name="UnusedImports"/>
+        <module name="RedundantImport"/>
+
+        <module name="PackageName">
+            <property name="format" value="^[a-z]+(\.[a-zA-Z][a-zA-Z0-9]*)*$"/>
+        </module>
+        <module name="TypeName"/>
+        <module name="MethodName"/>
+        <module name="MemberName"/>
+        <module name="ParameterName"/>
+        <module name="LocalVariableName"/>
+        <module name="ConstantName">
+            <property name="format" value="^log$|^[A-Z][A-Z0-9]*(_[A-Z0-9]+)*$"/>
+        </module>
+
+        <module name="NeedBraces"/>
+        <module name="LeftCurly"/>
+        <module name="RightCurly"/>
+
+        <module name="ModifierOrder"/>
+        <module name="RedundantModifier"/>
+        <module name="EmptyStatement"/>
+        <module name="EqualsHashCode"/>
+        <module name="SimplifyBooleanExpression"/>
+        <module name="SimplifyBooleanReturn"/>
+        <module name="StringLiteralEquality"/>
+        <module name="DefaultComesLast"/>
+        <module name="MultipleVariableDeclarations"/>
+        <module name="OneStatementPerLine"/>
+        <module name="FallThrough"/>
+        <module name="HideUtilityClassConstructor"/>
+        <module name="OneTopLevelClass"/>
+        <module name="UpperEll"/>
+        <module name="ArrayTypeStyle"/>
+        <module name="MissingSwitchDefault"/>
+        <module name="OuterTypeFilename"/>
+
+        <module name="EmptyBlock">
+            <property name="option" value="text"/>
+        </module>
+        <module name="EmptyCatchBlock">
+            <property name="exceptionVariableName" value="expected|ignore"/>
+        </module>
+
+        <module name="EqualsAvoidNull"/>
+        <module name="NoFinalizer"/>
+        <module name="NoClone"/>
+        <module name="PackageDeclaration"/>
+    </module>
+</module>