Make the language adapter

build.gradle.kts

@@ -210,6 +210,8 @@ dependencies {
     } else {
         modImplementation("maven.modrinth:frozenlib:${frozenlib_version}")?.let { include(it) }
     }
+
+    compileOnly("org.projectlombok:lombok:1.18.34")?.let { annotationProcessor(it) }
 }
 
 tasks {

src/main/java/net/frozenblock/unforked/FabricLoaderInterface.java

@@ -0,0 +1,37 @@
+package net.frozenblock.unforked;
+
+import lombok.experimental.UtilityClass;
+import net.fabricmc.loader.impl.FabricLoaderImpl;
+import net.fabricmc.loader.impl.discovery.ModCandidate;
+import net.fabricmc.loader.impl.metadata.LoaderModMetadata;
+import org.jetbrains.annotations.ApiStatus;
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+import java.util.Collection;
+import java.util.List;
+
+// Inspired by ModsMod
+@ApiStatus.Internal
+@UtilityClass
+public class FabricLoaderInterface {
+	static void init() {}
+
+	private static final Method ADD_MOD;
+	private static final Method CREATE_PLAIN;
+	private static final Field MODS;
+
+	static {
+		try {
+			ADD_MOD = FabricLoaderImpl.class.getDeclaredMethod("addMod", ModCandidate.class);
+			ADD_MOD.setAccessible(true);
+
+			MODS = FabricLoaderImpl.class.getDeclaredField("mods");
+			MODS.setAccessible(true);
+
+			CREATE_PLAIN = ModCandidate.class.getDeclaredMethod("createPlain", List.class, LoaderModMetadata.class, boolean.class, Collection.class);
+			CREATE_PLAIN.setAccessible(true);
+		} catch (NoSuchMethodException | NoSuchFieldException e) {
+			throw new RuntimeException(e);
+		}
+	}
+}

src/main/java/net/frozenblock/unforked/UnforkedLanguageAdapter.java

@@ -0,0 +1,14 @@
+package net.frozenblock.unforked;
+
+
+import net.fabricmc.loader.api.LanguageAdapter;
+import net.fabricmc.loader.api.ModContainer;
+
+public final class UnforkedLanguageAdapter implements LanguageAdapter {
+	@Override
+	public native <T> T create(ModContainer mod, String value, Class<T> type);
+
+	static {
+		UnforkedLoader.init();
+	}
+}

src/main/java/net/frozenblock/unforked/UnforkedLoader.java

@@ -0,0 +1,13 @@
+package net.frozenblock.unforked;
+
+import lombok.experimental.UtilityClass;
+import org.jetbrains.annotations.ApiStatus;
+
+@ApiStatus.Internal
+@UtilityClass
+public class UnforkedLoader {
+
+	void init() {
+		System.out.println("This is working");
+	}
+}

src/main/resources/fabric.mod.json

@@ -29,6 +29,9 @@
       "net.frozenblock.unforked.datagen.UnforkedDataGenerator"
     ]
   },
+  "languageAdapters": {
+    "unforked": "net.frozenblock.unforked.UnforkedLanguageAdapter"
+  },
   "mixins": [
     "unforked.mixins.json"
   ],