Initial project setup: RoadRunner (Multi-loader Stonecutter Template)

.gitignore

@@ -0,0 +1,20 @@
+.gradle/
+build/
+gradle/wrapper/gradle-wrapper.jar
+
+.architectury-transformer
+
+### Minecraft ###
+.runs/
+
+### IntelliJ IDEA ###
+.idea/
+*.iml
+*.ipr
+*.iws
+
+### Java ###
+hs_err_*.log
+replay_*.log
+*.hprof
+*.jfr

PLAN.md

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+# RoadRunner Development Plan
+
+## Phase 1: The Foundation (Setup)
+- [x] Initialize Project Boilerplate (Stonecutter/Architectury)
+- [x] Configure Project Metadata (RoadRunner, com.bnair.roadrunner)
+- [ ] User: Install Java 21 and IntelliJ IDEA
+- [ ] User: Run `./gradlew build` to verify setup
+
+## Phase 2: The Mathematician (Core Logic)
+- [ ] Implement `BezierCurve` class (Cubic Bezier math)
+- [ ] Implement `RoadProfile` data structure:
+    - Lanes (Width, Type, Material)
+    - Banking logic
+    - Snapping logic (Tangents)
+- [ ] Create debug "Planner Item" to visualize curves with particles
+
+## Phase 3: The Architect (GUI & Blueprints)
+- [ ] Integrate **Owo-lib** for GUI
+- [ ] Create "Blueprint Planner" item
+- [ ] Implement Top-Down Map GUI (DrawContext)
+- [ ] Implement "Ghost" rendering for planned roads (WorldRenderEvents)
+
+## Phase 4: The Foreman (Survival Mechanics)
+- [ ] Create "Site Office" Block
+- [ ] Implement Resource Consumption logic
+- [ ] Implement "Virtual Crew" construction mechanic (Progressive building)
+- [ ] Add sound effects and particles for construction
+
+## Phase 5: The Civil Engineer (Advanced Features)
+- [ ] Terrain Mode: "Follow Terrain" vs "Cut & Fill"
+- [ ] Bridges and Tunnels automation
+- [ ] "Demolition Tool" with undo capability
+
+## Technical Decisions
+- **Loader:** Multi-loader (Fabric & NeoForge) via Architectury & Stonecutter
+- **Language:** Kotlin
+- **GUI Lib:** Owo-lib
+- **Rendering:** Fabric API / Architectury Rendering API

README_SETUP.md

@@ -0,0 +1,24 @@
+# RoadRunner Setup Instructions
+
+## Prerequisites
+1. **Java 21 JDK**: You must have Java 21 installed.
+   - Verify with: `java -version`
+2. **IntelliJ IDEA**: Recommended IDE for Kotlin/Minecraft development.
+   - Install the "Minecraft Development" plugin.
+
+## Getting Started
+1. Open this folder in IntelliJ IDEA.
+2. Allow Gradle to sync. This might take a few minutes as it downloads Minecraft and dependencies.
+3. To run the mod:
+   - Open the "Gradle" tab in IntelliJ.
+   - Navigate to `RoadRunner -> Tasks -> architectury -> runClient`.
+   - Or run in terminal: `./gradlew runClient`
+
+## Project Structure
+- `src/main/kotlin`: Main mod logic (Common code)
+- `src/main/java`: Java sources (Mixins)
+- `versions/`: Loader-specific configurations (Fabric/NeoForge)
+- `PLAN.md`: Development roadmap
+
+## Next Steps
+Check `PLAN.md` for the feature roadmap.

build.gradle.kts

@@ -0,0 +1,163 @@
+import org.jetbrains.gradle.ext.packagePrefix
+import org.jetbrains.gradle.ext.settings
+
+plugins {
+	kotlin("jvm")
+	id("dev.architectury.loom")
+	id("architectury-plugin")
+}
+
+val mcVersion = stonecutter.current.version
+val loaderPlatform: String = requireNotNull(findProperty("loom.platform") as? String) { "loom.platform property is required but not found" }
+
+val modGroup: String by project
+val modVersion: String by project
+val modId: String by project
+
+group = modGroup
+version = modVersion
+base { archivesName = "${modId}-${loaderPlatform}" }
+
+architectury {
+	when (loaderPlatform) {
+		"fabric" -> fabric()
+		"neoforge" -> neoForge()
+	}
+	platformSetupLoomIde()
+	minecraft = mcVersion
+}
+
+loom {
+	silentMojangMappingsLicense()
+	log4jConfigs.from(rootProject.file("log4j2.xml"))
+	accessWidenerPath = rootProject.file("src/main/resources/$modId.accesswidener")
+
+	decompilers {
+		get("vineflower").apply { // Adds names to lambdas - useful for mixins
+			options.put("mark-corresponding-synthetics", "1")
+		}
+	}
+
+	runs {
+		named("client") {
+			client()
+			configName = "Client"
+			runDir("../../.runs/client")
+			programArg("--username=Dev")
+			ideConfigGenerated(true)
+		}
+		named("server") {
+			server()
+			configName = "Server"
+			runDir("../../.runs/server")
+			ideConfigGenerated(true)
+		}
+	}
+}
+
+val nonModImplementation: Configuration by configurations.creating
+
+configurations {
+	implementation.get().extendsFrom(nonModImplementation)
+	include.get().extendsFrom(nonModImplementation)
+	if (loaderPlatform == "neoforge")
+		getByName("forgeRuntimeLibrary").extendsFrom(nonModImplementation)
+}
+
+repositories {
+	mavenCentral()
+	maven("https://maven.architectury.dev/")
+	maven("https://maven.fabricmc.net/")
+	maven("https://maven.minecraftforge.net/")
+	maven("https://maven.neoforged.net/releases/")
+}
+
+val loaderVersion: String by project
+
+dependencies {
+	val parchmentMinecraftVersion: String by project
+	val parchmentMappingsVersion: String by project
+
+	minecraft("com.mojang:minecraft:$mcVersion")
+	mappings(loom.layered {
+		officialMojangMappings()
+		parchment("org.parchmentmc.data:parchment-$parchmentMinecraftVersion:$parchmentMappingsVersion@zip")
+	})
+
+	when (loaderPlatform) {
+		"fabric" -> {
+			val fabricApiVersion: String by project
+
+			modImplementation("net.fabricmc:fabric-loader:${loaderVersion}")
+			modImplementation("net.fabricmc.fabric-api:fabric-api:${fabricApiVersion}")
+		}
+
+		"neoforge" -> {
+			"neoForge"("net.neoforged:neoforge:${loaderVersion}")
+		}
+	}
+
+	nonModImplementation(kotlin("stdlib"))
+	nonModImplementation(kotlin("stdlib-jdk8"))
+	nonModImplementation(kotlin("stdlib-jdk7"))
+	nonModImplementation(kotlin("reflect", version = "2.2.0"))
+	nonModImplementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.10.2")
+	nonModImplementation("org.jetbrains.kotlinx:kotlinx-coroutines-jdk8:1.10.2")
+	nonModImplementation("org.jetbrains.kotlinx:kotlinx-serialization-core:1.8.1")
+	nonModImplementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.8.1")
+	nonModImplementation("org.jetbrains.kotlinx:kotlinx-serialization-cbor:1.8.1")
+	nonModImplementation("org.jetbrains.kotlinx:kotlinx-datetime:0.6.2")
+	nonModImplementation("org.jetbrains.kotlinx:kotlinx-io-core:0.7.0")
+	nonModImplementation("org.jetbrains.kotlinx:kotlinx-io-bytestring:0.7.0")
+}
+
+val javaVersion: String by project
+
+tasks {
+	processResources {
+		val modName: String by project
+		val modDescription: String by project
+		val modLicense: String by project
+		val modAuthors: String by project
+
+		val props = mutableMapOf(
+			"java_version" to javaVersion,
+			"minecraft_version" to mcVersion,
+
+			"mod_version" to modVersion,
+			"mod_group" to modGroup,
+			"mod_id" to modId,
+
+			"mod_name" to modName,
+			"mod_description" to modDescription,
+			"mod_license" to modLicense,
+			"fabric_mod_authors" to modAuthors.split(",").joinToString(", ") { "\"$it\"" },
+			"mod_authors" to modAuthors,
+
+			"loader_version" to when (loaderPlatform) {
+				"fabric" -> loaderVersion
+				"neoforge" -> loaderVersion
+				else -> null
+			},
+		)
+
+		inputs.properties(props)
+		filesMatching(listOf("META-INF/mods.toml", "META-INF/neoforge.mods.toml", "fabric.mod.json", "**.mixins.json", "pack.mcmeta")) {
+			expand(props)
+		}
+	}
+
+	remapJar {
+		injectAccessWidener.set(true)
+		if (loaderPlatform == "neoforge")
+			atAccessWideners.add(loom.accessWidenerPath.get().asFile.name)
+	}
+}
+
+kotlin {
+	jvmToolchain(javaVersion.toInt())
+}
+
+java {
+	withSourcesJar()
+}

gradle.properties

@@ -0,0 +1,21 @@
+org.gradle.jvmargs = -Xmx4G
+org.gradle.parallel = true
+fabric.loom.multiProjectOptimisation = true
+
+modVersion = 1.0.0
+modId = roadrunner
+modGroup = com.bnair.roadrunner
+
+modName = RoadRunner
+modDescription = A mod for building large scale highways and roadways.
+modAuthors = bnair
+modLicense = MIT
+
+### Mod properties ###
+mod.version = 1.0.0
+mod.group = com.bnair.roadrunner
+mod.id = roadrunner
+
+mod.name = RoadRunner
+mod.description = A mod for building large scale highways and roadways.
+mod.license = MIT

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.12-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,249 @@
+#!/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/HEAD/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
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&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: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$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
+
+
+# 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"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$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 "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,92 @@
+@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=.
+@rem This is normally unused
+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% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+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% equ 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!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle.kts

@@ -0,0 +1,29 @@
+pluginManagement {
+    repositories {
+        mavenCentral()
+        gradlePluginPortal()
+        maven("https://maven.architectury.dev/") { name = "Architectury" }
+        maven("https://maven.fabricmc.net/") { name = "Fabric" }
+        maven("https://maven.minecraftforge.net/") { name = "Forge" }
+        maven("https://maven.neoforged.net/releases/") { name = "NeoForge" }
+        maven("https://maven.kikugie.dev/snapshots") { name = "KikuGie Snapshots" }
+    }
+}
+
+plugins {
+    id("dev.kikugie.stonecutter") version "0.7.10"
+}
+
+rootProject.name = "RoadRunner"
+
+stonecutter {
+    create(rootProject) {
+        fun mc(mcVersion: String, name: String = mcVersion, loaders: Iterable<String>) {
+            for (loader in loaders) {
+                version("$name-$loader", mcVersion)
+            }
+        }
+
+        mc("1.21.10", loaders = listOf("fabric", "neoforge"))
+    }
+}

src/main/java/com/bnair/roadrunner/mixin/MinecraftMixin.java

@@ -0,0 +1,15 @@
+package com.bnair.roadrunner.mixin;
+
+import net.minecraft.client.gui.screen.TitleScreen;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+@Mixin(TitleScreen.class)
+public class MinecraftMixin {
+    @Inject(at = @At("HEAD"), method = "init()V")
+    private void init(CallbackInfo info) {
+        System.out.println("RoadRunner Mixin Initialized!");
+    }
+}

src/main/kotlin/com/bnair/roadrunner/RoadRunner.kt

@@ -0,0 +1,31 @@
+package com.bnair.roadrunner
+
+//? if fabric {
+import net.fabricmc.api.ModInitializer
+//?}
+//? if neoforge {
+import net.neoforged.fml.common.Mod
+//?}
+
+internal const val MOD_ID = "roadrunner"
+
+internal fun initializeMod() {
+    println("RoadRunner Mod has been initialized.")
+}
+
+//? if fabric {
+class RoadRunnerFabric : ModInitializer {
+    override fun onInitialize() {
+        initializeMod()
+    }
+}
+//?}
+
+//? if neoforge {
+@Mod(MOD_ID)
+class RoadRunnerNeoForge {
+    init {
+        initializeMod()
+    }
+}
+//?}

src/main/resources/META-INF/neoforge.mods.toml

@@ -0,0 +1,29 @@
+modLoader = "javafml"
+loaderVersion = "*"
+issueTrackerURL = "https://github.com/ThePandaOliver/Multiloader-Template/issues"
+license = "${mod_license}"
+
+[[mods]]
+modId = "${mod_id}"
+version = "${mod_version}"
+displayName = "${mod_name}"
+authors = "${mod_authors}"
+description = "${mod_description}"
+logoFile = "assets/${mod_id}/icon.png"
+
+[[dependencies."${mod_id}"]]
+modId = "neoforge"
+type = "required"
+versionRange = "*"
+ordering = "NONE"
+side = "BOTH"
+
+[[dependencies."${mod_id}"]]
+modId = "minecraft"
+type = "required"
+versionRange = "${loader_version}"
+ordering = "NONE"
+side = "BOTH"
+
+[[mixins]]
+config = "${mod_id}.mixins.json"

src/main/resources/architectury.common.json

@@ -0,0 +1,3 @@
+{
+  "accessWidener": "template.accesswidener"
+}

src/main/resources/fabric.mod.json

@@ -0,0 +1,42 @@
+{
+	"schemaVersion": 1,
+	"id": "${mod_id}",
+	"version": "${mod_version}",
+	"name": "${mod_name}",
+	"description": "${mod_description}",
+	"authors": [${fabric_mod_authors}],
+	"contact": {
+		"issues": "https://github.com/ThePandaOliver/Multiloader-Template/issues",
+		"sources": "https://github.com/ThePandaOliver/Multiloader-Template"
+	},
+	"license": "${mod_license}",
+	"icon": "assets/${mod_id}/icon.png",
+	"environment": "*",
+	"entrypoints": {
+		"main": [
+			"com.example.template.TemplateModFabric"
+		]
+	},
+	"mixins": [
+		"${mod_id}.mixins.json"
+	],
+	"depends": {
+		"fabric": ">=${loader_version}",
+		"fabric-api": "*",
+		"minecraft": "${minecraft_version}"
+	},
+	"custom": {
+		"modmenu": {
+			"links": {
+				"modmenu.discord": "https://discord.gg/wjPt4vEfXb",
+				"modmenu.curseforge": "https://www.curseforge.com/minecraft/mc-mods/example",
+				"modmenu.modrinth": "https://modrinth.com/mod/example",
+				"modmenu.github_releases": "https://github.com/ThePandaOliver/Multiloader-Template/releases"
+			},
+			"badges": [
+				"library"
+			],
+			"update_checker": true
+		}
+	}
+}

src/main/resources/pack.mcmeta

@@ -0,0 +1,6 @@
+{
+	"pack": {
+		"description": "${mod_name} v${mod_version} Resources",
+		"pack_format": 15
+	}
+}

src/main/resources/roadrunner.accesswidener

@@ -0,0 +1 @@
+accessWidener v2 named

src/main/resources/roadrunner.mixins.json

@@ -0,0 +1,13 @@
+{
+	"required": true,
+	"package": "com.example.template.mixin",
+	"compatibilityLevel": "JAVA_21",
+	"mixins": [
+	],
+	"client": [
+		"MinecraftMixin"
+	],
+	"injectors": {
+		"defaultRequire": 1
+	}
+}

stonecutter.gradle.kts

@@ -0,0 +1,30 @@
+import org.jetbrains.gradle.ext.packagePrefix
+import org.jetbrains.gradle.ext.settings
+
+plugins {
+	id("dev.kikugie.stonecutter")
+	kotlin("jvm") version "2.2.0" apply false
+	id("architectury-plugin") version "3.4-SNAPSHOT" apply false
+	id("dev.architectury.loom") version "1.11-SNAPSHOT" apply false
+	id("org.jetbrains.gradle.plugin.idea-ext") version "1.1.10"
+}
+stonecutter active "1.21.10-fabric"
+
+stonecutter parameters {
+	constants {
+		match(node.metadata.project.substringAfterLast("-"), "fabric", "neoforge", "forge")
+	}
+}
+
+val modGroup: String by project
+val modId: String by project
+
+idea {
+	module {
+		settings {
+			val packagePrefixStr = "$modGroup.$modId"
+			packagePrefix["src/main/kotlin"] = packagePrefixStr
+			packagePrefix["src/main/java"] = packagePrefixStr
+		}
+	}
+}

versions/1.21.10-fabric/gradle.properties

@@ -0,0 +1,11 @@
+javaVersion = 21
+
+loom.platform = fabric
+loaderVersion = 0.17.3
+
+# Parchment mapping
+parchmentMinecraftVersion = 1.21.9
+parchmentMappingsVersion = 2025.10.05
+
+# Dependencies
+fabricApiVersion = 0.135.0+1.21.10

versions/1.21.10-neoforge/gradle.properties

@@ -0,0 +1,9 @@
+javaVersion = 21
+
+loom.platform = neoforge
+loaderVersion = 21.10.16-beta
+yarnVersion = 1.21.10+build.2
+
+# Parchment mapping
+parchmentMinecraftVersion = 1.21.9
+parchmentMappingsVersion = 2025.10.05