diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
new file mode 100644
index 0000000..1d39407
--- /dev/null
+++ b/.github/workflows/build.yml
@@ -0,0 +1,17 @@
+name: Build
+on: [push]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v3
+      - name: Set up JDK 17
+        uses: actions/setup-java@v3
+        with:
+          java-version: '17'
+          distribution: 'temurin'
+      - name: Build with Gradle
+        uses: gradle/gradle-build-action@v2
+        with:
+          arguments: build
diff --git a/build.gradle.kts b/build.gradle.kts
index 2fe55d5..510de78 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,5 +1,3 @@
-import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
-
 plugins {
   `kotlin-dsl`
   kotlin("plugin.serialization") version "1.6.21"
@@ -33,22 +31,27 @@ gradlePlugin {
       implementationClass = "lgbt.mystic.foundation.concrete.ConcreteRootPlugin"
     }
 
-    create("concrete-project") {
-      id = "lgbt.mystic.foundation.concrete-project"
-      implementationClass = "lgbt.mystic.foundation.concrete.ConcreteProjectPlugin"
+    create("concrete-plugin") {
+      id = "lgbt.mystic.foundation.concrete-plugin"
+      implementationClass = "lgbt.mystic.foundation.concrete.ConcretePluginPlugin"
+    }
+
+    create("concrete-library") {
+      id = "lgbt.mystic.foundation.concrete-library"
+      implementationClass = "lgbt.mystic.foundation.concrete.ConcreteLibraryPlugin"
     }
   }
 }
 
 java {
-  val version = JavaVersion.toVersion("1.8")
+  val version = JavaVersion.toVersion("11")
   sourceCompatibility = version
   targetCompatibility = version
 }
 
-tasks.withType<KotlinCompile> {
+tasks.compileKotlin {
   kotlinOptions {
-    jvmTarget = "1.8"
+    jvmTarget = "11"
   }
 }
 
diff --git a/sample/hello-world/build.gradle.kts b/sample/hello-world/build.gradle.kts
deleted file mode 100644
index 0c3aca3..0000000
--- a/sample/hello-world/build.gradle.kts
+++ /dev/null
@@ -1,3 +0,0 @@
-plugins {
-  id("lgbt.mystic.foundation.concrete-project")
-}
diff --git a/samples/mixed/build.gradle.kts b/samples/mixed/build.gradle.kts
new file mode 100644
index 0000000..e69de29
diff --git a/sample/.gitignore b/samples/mixed/bukkit-plugins/.gitignore
similarity index 100%
rename from sample/.gitignore
rename to samples/mixed/bukkit-plugins/.gitignore
diff --git a/samples/mixed/bukkit-plugins/build.gradle.kts b/samples/mixed/bukkit-plugins/build.gradle.kts
new file mode 100644
index 0000000..0bc25ac
--- /dev/null
+++ b/samples/mixed/bukkit-plugins/build.gradle.kts
@@ -0,0 +1,10 @@
+plugins {
+  id("lgbt.mystic.foundation.concrete-root")
+}
+
+concrete {
+  minecraftServerPath.set("server")
+  paperVersionGroup.set("1.19")
+  paperApiVersion.set("1.19-R0.1-SNAPSHOT")
+  acceptServerEula.set(true)
+}
diff --git a/samples/mixed/bukkit-plugins/common-library/build.gradle.kts b/samples/mixed/bukkit-plugins/common-library/build.gradle.kts
new file mode 100644
index 0000000..10925e6
--- /dev/null
+++ b/samples/mixed/bukkit-plugins/common-library/build.gradle.kts
@@ -0,0 +1,3 @@
+plugins {
+  id("lgbt.mystic.foundation.concrete-library")
+}
diff --git a/samples/mixed/bukkit-plugins/common-library/src/main/kotlin/lgbt/mystic/foundation/concrete/sample/common/CommonExtensions.kt b/samples/mixed/bukkit-plugins/common-library/src/main/kotlin/lgbt/mystic/foundation/concrete/sample/common/CommonExtensions.kt
new file mode 100644
index 0000000..befb662
--- /dev/null
+++ b/samples/mixed/bukkit-plugins/common-library/src/main/kotlin/lgbt/mystic/foundation/concrete/sample/common/CommonExtensions.kt
@@ -0,0 +1,6 @@
+package lgbt.mystic.foundation.concrete.sample.common
+
+import org.bukkit.plugin.java.JavaPlugin
+
+fun JavaPlugin.logOnEnable(name: String) = slF4JLogger.info("Enabled $name")
+fun JavaPlugin.logOnDisable(name: String) = slF4JLogger.info("Disabled $name")
diff --git a/samples/mixed/bukkit-plugins/goodbye-world/build.gradle.kts b/samples/mixed/bukkit-plugins/goodbye-world/build.gradle.kts
new file mode 100644
index 0000000..e545dd3
--- /dev/null
+++ b/samples/mixed/bukkit-plugins/goodbye-world/build.gradle.kts
@@ -0,0 +1,7 @@
+plugins {
+  id("lgbt.mystic.foundation.concrete-plugin")
+}
+
+dependencies {
+  implementation(project(":bukkit-plugins:common-library"))
+}
diff --git a/samples/mixed/bukkit-plugins/goodbye-world/src/main/kotlin/lgbt/mystic/foundation/concrete/sample/goodbyeworld/GoodbyeWorldPlugin.kt b/samples/mixed/bukkit-plugins/goodbye-world/src/main/kotlin/lgbt/mystic/foundation/concrete/sample/goodbyeworld/GoodbyeWorldPlugin.kt
new file mode 100644
index 0000000..d0cd43f
--- /dev/null
+++ b/samples/mixed/bukkit-plugins/goodbye-world/src/main/kotlin/lgbt/mystic/foundation/concrete/sample/goodbyeworld/GoodbyeWorldPlugin.kt
@@ -0,0 +1,15 @@
+package lgbt.mystic.foundation.concrete.sample.goodbyeworld
+
+import lgbt.mystic.foundation.concrete.sample.common.logOnDisable
+import lgbt.mystic.foundation.concrete.sample.common.logOnEnable
+import org.bukkit.plugin.java.JavaPlugin
+
+class GoodbyeWorldPlugin : JavaPlugin() {
+  override fun onEnable() {
+    logOnEnable("Goodbye World")
+  }
+
+  override fun onDisable() {
+    logOnDisable("Goodbye World")
+  }
+}
diff --git a/samples/mixed/bukkit-plugins/goodbye-world/src/main/resources/plugin.yml b/samples/mixed/bukkit-plugins/goodbye-world/src/main/resources/plugin.yml
new file mode 100644
index 0000000..d108f04
--- /dev/null
+++ b/samples/mixed/bukkit-plugins/goodbye-world/src/main/resources/plugin.yml
@@ -0,0 +1,9 @@
+name: GoodbyeWorld
+version: '${version}'
+main: lgbt.mystic.foundation.concrete.sample.goodbyeworld.GoodbyeWorldPlugin
+api-version: 1.18
+prefix: GoodbyeWorld
+load: STARTUP
+authors:
+  - kubelet
+  - kexec
diff --git a/samples/mixed/bukkit-plugins/hello-world/build.gradle.kts b/samples/mixed/bukkit-plugins/hello-world/build.gradle.kts
new file mode 100644
index 0000000..faa219d
--- /dev/null
+++ b/samples/mixed/bukkit-plugins/hello-world/build.gradle.kts
@@ -0,0 +1,8 @@
+plugins {
+  id("lgbt.mystic.foundation.concrete-plugin")
+}
+
+dependencies {
+  implementation(project(":other-library"))
+  implementation(project(":bukkit-plugins:common-library"))
+}
diff --git a/samples/mixed/bukkit-plugins/hello-world/src/main/kotlin/lgbt/mystic/foundation/concrete/sample/helloworld/HelloWorldPlugin.kt b/samples/mixed/bukkit-plugins/hello-world/src/main/kotlin/lgbt/mystic/foundation/concrete/sample/helloworld/HelloWorldPlugin.kt
new file mode 100644
index 0000000..f071e08
--- /dev/null
+++ b/samples/mixed/bukkit-plugins/hello-world/src/main/kotlin/lgbt/mystic/foundation/concrete/sample/helloworld/HelloWorldPlugin.kt
@@ -0,0 +1,16 @@
+package lgbt.mystic.foundation.concrete.sample.helloworld
+
+import lgbt.mystic.foundation.concrete.other.OtherLibrary
+import lgbt.mystic.foundation.concrete.sample.common.logOnDisable
+import lgbt.mystic.foundation.concrete.sample.common.logOnEnable
+import org.bukkit.plugin.java.JavaPlugin
+
+class HelloWorldPlugin : JavaPlugin() {
+  override fun onEnable() {
+    logOnEnable(OtherLibrary.HELLO_WORLD)
+  }
+
+  override fun onDisable() {
+    logOnDisable(OtherLibrary.HELLO_WORLD)
+  }
+}
diff --git a/sample/hello-world/src/main/resources/plugin.yml b/samples/mixed/bukkit-plugins/hello-world/src/main/resources/plugin.yml
similarity index 100%
rename from sample/hello-world/src/main/resources/plugin.yml
rename to samples/mixed/bukkit-plugins/hello-world/src/main/resources/plugin.yml
diff --git a/sample/gradle/wrapper/gradle-wrapper.jar b/samples/mixed/gradle/wrapper/gradle-wrapper.jar
similarity index 100%
rename from sample/gradle/wrapper/gradle-wrapper.jar
rename to samples/mixed/gradle/wrapper/gradle-wrapper.jar
diff --git a/sample/gradle/wrapper/gradle-wrapper.properties b/samples/mixed/gradle/wrapper/gradle-wrapper.properties
similarity index 92%
rename from sample/gradle/wrapper/gradle-wrapper.properties
rename to samples/mixed/gradle/wrapper/gradle-wrapper.properties
index 41dfb87..aa991fc 100644
--- a/sample/gradle/wrapper/gradle-wrapper.properties
+++ b/samples/mixed/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.4-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.4.2-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/sample/gradlew b/samples/mixed/gradlew
similarity index 100%
rename from sample/gradlew
rename to samples/mixed/gradlew
diff --git a/sample/gradlew.bat b/samples/mixed/gradlew.bat
similarity index 100%
rename from sample/gradlew.bat
rename to samples/mixed/gradlew.bat
diff --git a/samples/mixed/other-library/build.gradle.kts b/samples/mixed/other-library/build.gradle.kts
new file mode 100644
index 0000000..0f14d1b
--- /dev/null
+++ b/samples/mixed/other-library/build.gradle.kts
@@ -0,0 +1,3 @@
+plugins {
+  `java-library`
+}
diff --git a/samples/mixed/other-library/src/main/java/lgbt/mystic/foundation/concrete/other/OtherLibrary.java b/samples/mixed/other-library/src/main/java/lgbt/mystic/foundation/concrete/other/OtherLibrary.java
new file mode 100644
index 0000000..1327d68
--- /dev/null
+++ b/samples/mixed/other-library/src/main/java/lgbt/mystic/foundation/concrete/other/OtherLibrary.java
@@ -0,0 +1,5 @@
+package lgbt.mystic.foundation.concrete.other;
+
+public class OtherLibrary {
+    public static final String HELLO_WORLD = "Hello World";
+}
diff --git a/samples/mixed/settings.gradle.kts b/samples/mixed/settings.gradle.kts
new file mode 100644
index 0000000..ffe8853
--- /dev/null
+++ b/samples/mixed/settings.gradle.kts
@@ -0,0 +1,6 @@
+includeBuild("../..")
+include(":bukkit-plugins")
+include(":bukkit-plugins:hello-world")
+include(":bukkit-plugins:goodbye-world")
+include(":bukkit-plugins:common-library")
+include(":other-library")
diff --git a/samples/simple/.gitignore b/samples/simple/.gitignore
new file mode 100644
index 0000000..ab39cbc
--- /dev/null
+++ b/samples/simple/.gitignore
@@ -0,0 +1 @@
+server/
diff --git a/sample/build.gradle.kts b/samples/simple/build.gradle.kts
similarity index 100%
rename from sample/build.gradle.kts
rename to samples/simple/build.gradle.kts
diff --git a/samples/simple/gradle/wrapper/gradle-wrapper.jar b/samples/simple/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..41d9927
Binary files /dev/null and b/samples/simple/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/samples/simple/gradle/wrapper/gradle-wrapper.properties b/samples/simple/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..aa991fc
--- /dev/null
+++ b/samples/simple/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.4.2-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/samples/simple/gradlew b/samples/simple/gradlew
new file mode 100755
index 0000000..1b6c787
--- /dev/null
+++ b/samples/simple/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/samples/simple/gradlew.bat b/samples/simple/gradlew.bat
new file mode 100644
index 0000000..107acd3
--- /dev/null
+++ b/samples/simple/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/samples/simple/hello-world/build.gradle.kts b/samples/simple/hello-world/build.gradle.kts
new file mode 100644
index 0000000..af92cdf
--- /dev/null
+++ b/samples/simple/hello-world/build.gradle.kts
@@ -0,0 +1,3 @@
+plugins {
+  id("lgbt.mystic.foundation.concrete-plugin")
+}
diff --git a/sample/hello-world/src/main/kotlin/lgbt/mystic/foundation/concrete/sample/helloworld/HelloWorldPlugin.kt b/samples/simple/hello-world/src/main/kotlin/lgbt/mystic/foundation/concrete/sample/helloworld/HelloWorldPlugin.kt
similarity index 100%
rename from sample/hello-world/src/main/kotlin/lgbt/mystic/foundation/concrete/sample/helloworld/HelloWorldPlugin.kt
rename to samples/simple/hello-world/src/main/kotlin/lgbt/mystic/foundation/concrete/sample/helloworld/HelloWorldPlugin.kt
diff --git a/samples/simple/hello-world/src/main/resources/plugin.yml b/samples/simple/hello-world/src/main/resources/plugin.yml
new file mode 100644
index 0000000..3eadd8a
--- /dev/null
+++ b/samples/simple/hello-world/src/main/resources/plugin.yml
@@ -0,0 +1,9 @@
+name: HelloWorld
+version: '${version}'
+main: lgbt.mystic.foundation.concrete.sample.helloworld.HelloWorldPlugin
+api-version: 1.18
+prefix: HelloWorld
+load: STARTUP
+authors:
+  - kubelet
+  - kexec
diff --git a/sample/settings.gradle.kts b/samples/simple/settings.gradle.kts
similarity index 52%
rename from sample/settings.gradle.kts
rename to samples/simple/settings.gradle.kts
index e73b51e..6d5a5a6 100644
--- a/sample/settings.gradle.kts
+++ b/samples/simple/settings.gradle.kts
@@ -1,2 +1,2 @@
-includeBuild("..")
+includeBuild("../..")
 include(":hello-world")
diff --git a/src/main/kotlin/lgbt/mystic/foundation/concrete/ConcreteExtension.kt b/src/main/kotlin/lgbt/mystic/foundation/concrete/ConcreteExtension.kt
index 57c393d..8cee80a 100644
--- a/src/main/kotlin/lgbt/mystic/foundation/concrete/ConcreteExtension.kt
+++ b/src/main/kotlin/lgbt/mystic/foundation/concrete/ConcreteExtension.kt
@@ -6,4 +6,5 @@ interface ConcreteExtension {
   val paperVersionGroup: Property<String>
   val paperApiVersion: Property<String>
   val minecraftServerPath: Property<String>
+  val acceptServerEula: Property<Boolean>
 }
diff --git a/src/main/kotlin/lgbt/mystic/foundation/concrete/ConcreteLibraryPlugin.kt b/src/main/kotlin/lgbt/mystic/foundation/concrete/ConcreteLibraryPlugin.kt
new file mode 100644
index 0000000..8ad4c32
--- /dev/null
+++ b/src/main/kotlin/lgbt/mystic/foundation/concrete/ConcreteLibraryPlugin.kt
@@ -0,0 +1,3 @@
+package lgbt.mystic.foundation.concrete
+
+class ConcreteLibraryPlugin : ConcreteProjectPlugin()
diff --git a/src/main/kotlin/lgbt/mystic/foundation/concrete/ConcretePluginPlugin.kt b/src/main/kotlin/lgbt/mystic/foundation/concrete/ConcretePluginPlugin.kt
new file mode 100644
index 0000000..697cf33
--- /dev/null
+++ b/src/main/kotlin/lgbt/mystic/foundation/concrete/ConcretePluginPlugin.kt
@@ -0,0 +1,31 @@
+package lgbt.mystic.foundation.concrete
+
+import org.gradle.api.Project
+import org.gradle.kotlin.dsl.get
+import org.gradle.language.jvm.tasks.ProcessResources
+
+@Suppress("UnstableApiUsage")
+class ConcretePluginPlugin : ConcreteProjectPlugin() {
+  override fun apply(project: Project) {
+    super.apply(project)
+
+    project.plugins.apply("com.github.johnrengelman.shadow")
+
+    project.tasks.find<ProcessResources>("processResources")!!.apply {
+      val props = mapOf("version" to project.version.toString())
+      inputs.properties(props)
+      filteringCharset = "UTF-8"
+      filesMatching("plugin.yml") {
+        expand(props)
+      }
+    }
+
+    project.shadowJarTask!!.apply {
+      archiveClassifier.set("plugin")
+    }
+
+    project.tasks.addTaskDependency("assemble", "shadowJar")
+
+    project.concreteRootProject.tasks["setupPaperServer"].dependsOn(project.tasks["shadowJar"])
+  }
+}
diff --git a/src/main/kotlin/lgbt/mystic/foundation/concrete/ConcreteProjectPlugin.kt b/src/main/kotlin/lgbt/mystic/foundation/concrete/ConcreteProjectPlugin.kt
index 2e66842..1fc19a2 100644
--- a/src/main/kotlin/lgbt/mystic/foundation/concrete/ConcreteProjectPlugin.kt
+++ b/src/main/kotlin/lgbt/mystic/foundation/concrete/ConcreteProjectPlugin.kt
@@ -1,21 +1,16 @@
 package lgbt.mystic.foundation.concrete
 
-import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar
 import org.gradle.api.JavaVersion
 import org.gradle.api.Plugin
 import org.gradle.api.Project
 import org.gradle.api.plugins.JavaPluginExtension
-import org.gradle.api.tasks.compile.JavaCompile
-import org.gradle.kotlin.dsl.get
 import org.gradle.kotlin.dsl.getByType
 import org.gradle.kotlin.dsl.repositories
 import org.gradle.kotlin.dsl.withType
-import org.gradle.language.jvm.tasks.ProcessResources
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 import java.net.URI
 
-@Suppress("UnstableApiUsage")
-class ConcreteProjectPlugin : Plugin<Project> {
+open class ConcreteProjectPlugin : Plugin<Project> {
   override fun apply(project: Project) {
     val versionWithBuild = if (System.getenv("CI_PIPELINE_IID") != null) {
       project.rootProject.version.toString() + ".${System.getenv("CI_PIPELINE_IID")}"
@@ -23,11 +18,10 @@ class ConcreteProjectPlugin : Plugin<Project> {
       "DEV"
     }
 
+    project.version = versionWithBuild
+
     project.plugins.apply("org.jetbrains.kotlin.jvm")
     project.plugins.apply("org.jetbrains.kotlin.plugin.serialization")
-    project.plugins.apply("com.github.johnrengelman.shadow")
-
-    project.version = versionWithBuild
 
     project.repositories {
       maven {
@@ -36,8 +30,7 @@ class ConcreteProjectPlugin : Plugin<Project> {
       }
     }
 
-    val paperApiVersion = project.rootProject.extensions.getByType<ConcreteExtension>().paperApiVersion.get()
-
+    val paperApiVersion = project.concreteRootExtension.paperApiVersion.get()
     project.dependencies.add("compileOnly", "io.papermc.paper:paper-api:${paperApiVersion}")
 
     project.extensions.getByType<JavaPluginExtension>().apply {
@@ -46,21 +39,6 @@ class ConcreteProjectPlugin : Plugin<Project> {
       targetCompatibility = javaVersion
     }
 
-    (project.tasks.getByName("processResources") as ProcessResources).apply {
-      val props = mapOf("version" to project.version.toString())
-      inputs.properties(props)
-      filteringCharset = "UTF-8"
-      filesMatching("plugin.yml") {
-        expand(props)
-      }
-    }
-
-    (project.tasks["shadowJar"] as ShadowJar).apply {
-      archiveClassifier.set("plugin")
-    }
-
-    project.tasks["assemble"].dependsOn(project.tasks["shadowJar"])
-
     project.tasks.withType<KotlinCompile>().forEach {
       it.apply {
         kotlinOptions.apply {
@@ -68,7 +46,5 @@ class ConcreteProjectPlugin : Plugin<Project> {
         }
       }
     }
-
-    project.rootProject.tasks["setupPaperServer"].dependsOn(project.tasks["shadowJar"])
   }
 }
diff --git a/src/main/kotlin/lgbt/mystic/foundation/concrete/ConcreteRootPlugin.kt b/src/main/kotlin/lgbt/mystic/foundation/concrete/ConcreteRootPlugin.kt
index 0c04a14..e17518d 100644
--- a/src/main/kotlin/lgbt/mystic/foundation/concrete/ConcreteRootPlugin.kt
+++ b/src/main/kotlin/lgbt/mystic/foundation/concrete/ConcreteRootPlugin.kt
@@ -7,7 +7,7 @@ import org.gradle.kotlin.dsl.create
 
 class ConcreteRootPlugin : Plugin<Project> {
   override fun apply(project: Project) {
-    project.apply(plugin = "java")
+    project.apply(plugin = "base")
     project.extensions.create<ConcreteExtension>("concrete")
     val setupPaperServer = project.tasks.create<SetupPaperServer>("setupPaperServer")
     val runPaperServer = project.tasks.create<RunPaperServer>("runPaperServer")
diff --git a/src/main/kotlin/lgbt/mystic/foundation/concrete/PaperVersionClient.kt b/src/main/kotlin/lgbt/mystic/foundation/concrete/PaperVersionClient.kt
index 9a62ef3..d2ea7c8 100644
--- a/src/main/kotlin/lgbt/mystic/foundation/concrete/PaperVersionClient.kt
+++ b/src/main/kotlin/lgbt/mystic/foundation/concrete/PaperVersionClient.kt
@@ -7,7 +7,7 @@ import java.net.http.HttpRequest
 import java.net.http.HttpResponse
 
 class PaperVersionClient(
-  val client: HttpClient = HttpClient.newHttpClient(),
+  private val client: HttpClient = HttpClient.newHttpClient(),
   private val gson: Gson = Globals.gson
 ) {
   private val apiBaseUrl = URI.create("https://papermc.io/api/v2/")
diff --git a/src/main/kotlin/lgbt/mystic/foundation/concrete/RunPaperServer.kt b/src/main/kotlin/lgbt/mystic/foundation/concrete/RunPaperServer.kt
index ea76298..c0dbfad 100644
--- a/src/main/kotlin/lgbt/mystic/foundation/concrete/RunPaperServer.kt
+++ b/src/main/kotlin/lgbt/mystic/foundation/concrete/RunPaperServer.kt
@@ -1,6 +1,7 @@
 package lgbt.mystic.foundation.concrete
 
 import org.gradle.api.DefaultTask
+import org.gradle.api.tasks.Input
 import org.gradle.api.tasks.TaskAction
 import org.gradle.kotlin.dsl.getByType
 import java.io.File
@@ -11,6 +12,12 @@ open class RunPaperServer : DefaultTask() {
     outputs.upToDateWhen { false }
   }
 
+  @get:Input
+  var additionalServerArguments = mutableListOf<String>()
+
+  @get:Input
+  var disableServerGui = true
+
   @TaskAction
   fun runPaperServer() {
     val concrete = project.extensions.getByType<ConcreteExtension>()
@@ -22,7 +29,14 @@ open class RunPaperServer : DefaultTask() {
     project.javaexec {
       classpath(paperJarFile.absolutePath)
       workingDir(minecraftServerDirectory)
-      args("nogui")
+
+      val allServerArguments = mutableListOf<String>()
+      allServerArguments.addAll(additionalServerArguments)
+      if (disableServerGui) {
+        allServerArguments.add("nogui")
+      }
+
+      args(allServerArguments)
       mainClass.set(mainClassName)
     }
   }
diff --git a/src/main/kotlin/lgbt/mystic/foundation/concrete/SetupPaperServer.kt b/src/main/kotlin/lgbt/mystic/foundation/concrete/SetupPaperServer.kt
index 65a5cc7..b0742fa 100644
--- a/src/main/kotlin/lgbt/mystic/foundation/concrete/SetupPaperServer.kt
+++ b/src/main/kotlin/lgbt/mystic/foundation/concrete/SetupPaperServer.kt
@@ -1,6 +1,5 @@
 package lgbt.mystic.foundation.concrete
 
-import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar
 import org.gradle.api.DefaultTask
 import org.gradle.api.tasks.Input
 import org.gradle.api.tasks.TaskAction
@@ -8,6 +7,7 @@ import org.gradle.api.tasks.options.Option
 import org.gradle.kotlin.dsl.getByType
 import java.io.File
 import java.nio.file.Files
+import java.util.Properties
 
 open class SetupPaperServer : DefaultTask() {
   init {
@@ -16,7 +16,7 @@ open class SetupPaperServer : DefaultTask() {
 
   @get:Input
   @set:Option(option = "update", description = "Update Paper Server")
-  var shouldUpdatePaperServer = false
+  var shouldUpdatePaperServer = true
 
   private val paperVersionClient = PaperVersionClient()
 
@@ -40,20 +40,32 @@ open class SetupPaperServer : DefaultTask() {
       paperPluginsDirectory.mkdirs()
     }
 
-    for (project in project.allprojects) {
-      if (!project.isPluginProject()) {
-        continue
-      }
-
-      val task = project.tasks.getByName("shadowJar") as ShadowJar
+    for (project in project.findPluginProjects()) {
+      val task = project.shadowJarTask!!
       val pluginJarFile = task.outputs.files.first()
       val pluginLinkFile = paperPluginsDirectory.resolve("${project.name}.jar")
       pluginLinkFile.delete()
       Files.createSymbolicLink(pluginLinkFile.toPath(), pluginJarFile.toPath())
     }
+
+    if (concrete.acceptServerEula.isPresent && concrete.acceptServerEula.get()) {
+      val writer = minecraftServerDirectory.resolve("eula.txt").bufferedWriter()
+      val properties = Properties()
+      properties.setProperty("eula", "true")
+      properties.store(writer, "Written by Concrete")
+      writer.close()
+    }
   }
 
   private fun downloadLatestBuild(paperVersionGroup: String, paperJarFile: File) {
+    if (project.gradle.startParameter.isOffline) {
+      if (!paperJarFile.exists()) {
+        throw RuntimeException("Offline mode is enabled and Paper has not been downloaded.")
+      } else {
+        logger.lifecycle("Offline mode is enabled, skipping Paper update.")
+        return
+      }
+    }
     val builds = paperVersionClient.getVersionBuilds(paperVersionGroup)
     val build = builds.last()
     val download = build.downloads["application"]!!
diff --git a/src/main/kotlin/lgbt/mystic/foundation/concrete/SmartDownloader.kt b/src/main/kotlin/lgbt/mystic/foundation/concrete/SmartDownloader.kt
index 2f00988..6116338 100644
--- a/src/main/kotlin/lgbt/mystic/foundation/concrete/SmartDownloader.kt
+++ b/src/main/kotlin/lgbt/mystic/foundation/concrete/SmartDownloader.kt
@@ -14,9 +14,9 @@ class SmartDownloader(
     val hashResult = checkLocalFileHash()
     if (hashResult != HashResult.ValidHash) {
       downloadRemoteFile()
-      return false
+      return true
     }
-    return true
+    return false
   }
 
   private fun downloadRemoteFile() {
diff --git a/src/main/kotlin/lgbt/mystic/foundation/concrete/UpdateManifestTask.kt b/src/main/kotlin/lgbt/mystic/foundation/concrete/UpdateManifestTask.kt
index aeaaeb4..eaebf7b 100644
--- a/src/main/kotlin/lgbt/mystic/foundation/concrete/UpdateManifestTask.kt
+++ b/src/main/kotlin/lgbt/mystic/foundation/concrete/UpdateManifestTask.kt
@@ -12,7 +12,7 @@ open class UpdateManifestTask : DefaultTask() {
     val updateFile = manifestsDir.resolve("update.json")
     val rootPath = project.rootProject.rootDir.toPath()
     val updateManifest = project.findPluginProjects().mapNotNull { project ->
-      val paths = project.shadowJarOutputs.allFilesRelativeToPath(rootPath)
+      val paths = project.shadowJarOutputs!!.allFilesRelativeToPath(rootPath)
       if (paths.isNotEmpty()) {
         project.name to mapOf(
           "version" to project.version,
diff --git a/src/main/kotlin/lgbt/mystic/foundation/concrete/extensions.kt b/src/main/kotlin/lgbt/mystic/foundation/concrete/extensions.kt
index 273ad88..0448c93 100644
--- a/src/main/kotlin/lgbt/mystic/foundation/concrete/extensions.kt
+++ b/src/main/kotlin/lgbt/mystic/foundation/concrete/extensions.kt
@@ -1,16 +1,70 @@
 package lgbt.mystic.foundation.concrete
 
+import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar
 import org.gradle.api.Project
+import org.gradle.api.tasks.TaskContainer
 import org.gradle.api.tasks.TaskOutputs
 import java.nio.file.FileSystems
 import java.nio.file.Path
 
-fun Project.isPluginProject() = project.tasks.names.contains("shadowJar")
-fun Project.findPluginProjects() = rootProject.allprojects.filter { project -> project.isPluginProject() }
+/**
+ * Checks if the project has the [ConcretePluginPlugin] applied.
+ */
+internal fun Project.isPluginProject() = plugins.hasPlugin(ConcretePluginPlugin::class.java)
 
-val Project.shadowJarOutputs: TaskOutputs
-  get() = project.tasks.getByName("shadowJar").outputs
+/**
+ * Finds all projects in the project's hierarchy that are plugins.
+ */
+internal fun Project.findPluginProjects() = allprojects.filter { project -> project.isPluginProject() }
 
-fun TaskOutputs.allFilesRelativeToPath(root: Path): List<Path> = files.map { root.relativize(it.toPath()) }
+internal fun TaskContainer.addTaskDependency(dependent: String, dependency: String) {
+  getByName(dependent).dependsOn(getByName(dependency))
+}
 
-fun Path.toUnixString() = toString().replace(FileSystems.getDefault().separator, "/")
+internal inline fun <reified T> TaskContainer.find(name: String) =
+  findByName(name) as T?
+
+internal val Project.shadowJarTask: ShadowJar?
+  get() = project.tasks.find<ShadowJar>("shadowJar")
+
+internal val Project.shadowJarOutputs: TaskOutputs?
+  get() = shadowJarTask?.outputs
+
+internal val Project.concreteRootExtension: ConcreteExtension
+  get() = findTargetParent(
+    valid = { extensions.findByType(ConcreteExtension::class.java) != null },
+    extract = { extensions.findByType(ConcreteExtension::class.java)!! },
+    error = { "Failed to find concrete root. Did you apply the concrete root plugin?" }
+  )
+
+/**
+ * Finds the concrete root project, which is the first project in the project hierarchy
+ * that has the concrete extension.
+ */
+internal val Project.concreteRootProject: Project
+  get() = findTargetParent(
+    valid = { extensions.findByType(ConcreteExtension::class.java) != null },
+    extract = { this },
+    error = { "Failed to find concrete root. Did you apply the concrete root plugin?" }
+  )
+
+/**
+ * Scans a project hierarchy looking for a project matching the criteria specified in [valid].
+ * If found, [extract] is called and the result is returned. If no matching project is found, [error] is called
+ * and passed to RuntimeException as an error string.
+ */
+internal fun <T> Project.findTargetParent(valid: Project.() -> Boolean, extract: Project.() -> T, error: () -> String): T {
+  if (valid(this)) {
+    return extract(this)
+  }
+
+  if (parent != null) {
+    return parent!!.findTargetParent(valid, extract, error)
+  }
+
+  throw RuntimeException(error())
+}
+
+internal fun TaskOutputs.allFilesRelativeToPath(root: Path): List<Path> = files.map { root.relativize(it.toPath()) }
+
+internal fun Path.toUnixString() = toString().replace(FileSystems.getDefault().separator, "/")