.forgejo/workflows/publish.yml

@@ -23,4 +23,4 @@ jobs:
         ./gradlew :publishMavenJavaPublicationToFrogMCSnapshotsMavenRepository \
         -PFrogMCSnapshotsMavenUsername=${{ secrets.MAVEN_PUSH_USER }} \
         -PFrogMCSnapshotsMavenPassword=${{ secrets.MAVEN_PUSH_TOKEN }} --stacktrace
-        ./gradlew :updateMeta
+        ./gradlew :updateMeta -PFrogMCMetaKey=${{ secrets.META_SECRET }} --stacktrace

build.gradle.kts

@@ -7,7 +7,7 @@ plugins {
 }
 
 group = "dev.frogmc"
-version = "0.0.1-SNAPSHOT"
+version = "0.0.1-alpha.1"
 
 repositories {
     maven {

gradle/libs.versions.toml

@@ -1,6 +1,6 @@
 [versions]
 
-thyroxine = "0.0.1-alpha.2"
+thyroxine = "0.0.1-alpha.3"
 nightconfig = "3.7.2"
 mixin = "0.14.0+mixin.0.8.6"
 annotations = "24.1.0"

minecraft/build.gradle.kts

@@ -1,6 +1,6 @@
 plugins {
     java
-    id("dev.frogmc.phytotelma") version "0.0.1-alpha.9"
+    id("dev.frogmc.phytotelma") version "0.0.1-alpha.10"
 }
 
 repositories {
@@ -20,7 +20,7 @@ dependencies {
 }
 
 phytotelma {
-    minecraft("1.20.6")
+    minecraft("1.21", "1.20.6")
 }
 
 java {

minecraft/src/main/java/dev/frogmc/frogloader/example/ExampleModProvider.java

@@ -0,0 +1,10 @@
+package dev.frogmc.frogloader.example;
+
+import dev.frogmc.frogloader.api.plugin.ModProvider;
+
+public class ExampleModProvider implements ModProvider {
+	@Override
+	public String id() {
+		return "example_mod:example";
+	}
+}

minecraft/src/main/resources/frog.mod.toml

@@ -14,4 +14,4 @@ credits = [
 prelaunch = "dev.frogmc.frogloader.example.ExamplePreLaunchExtension"
 mixin = "example_mod.mixins.json"
 accesswidener = "example_mod.accesswidener"
-
+modprovider = "dev.frogmc.frogloader.example.ExampleModProvider"

src/main/java/dev/frogmc/frogloader/api/FrogLoader.java

@@ -6,14 +6,15 @@ import java.util.Optional;
 
 import dev.frogmc.frogloader.api.env.Env;
 import dev.frogmc.frogloader.api.mod.ModProperties;
-import dev.frogmc.frogloader.api.plugin.FrogPlugin;
+import dev.frogmc.frogloader.api.plugin.GamePlugin;
+import dev.frogmc.frogloader.api.plugin.ModProvider;
 import dev.frogmc.frogloader.impl.FrogLoaderImpl;
 
 /**
  * General API to interact with this loader.
  *
  * @see ModProperties
- * @see FrogPlugin
+ * @see ModProvider
  * @see Env
  */
 public interface FrogLoader {
@@ -28,11 +29,18 @@ public interface FrogLoader {
 	}
 
 	/**
-	 * Get all loaded plugins.
+	 * Get the currently loaded game plugin.
 	 *
-	 * @return A collection of all loaded plugins
+	 * @return The game plugin applicable to the current game
 	 */
-	Collection<FrogPlugin> getPlugins();
+	GamePlugin getGamePlugin();
+
+	/**
+	 * Get all loaded mod providers.
+	 *
+	 * @return A collection of all loaded mod providers
+	 */
+	Collection<ModProvider> getModProviders();
 
 	/**
 	 * Get the current (physical) environment.
@@ -59,11 +67,11 @@ public interface FrogLoader {
 	Path getConfigDir();
 
 	/**
-	 * Get the current mods directory.
+	 * Get the current mods directories.
 	 *
-	 * @return The current mods directory
+	 * @return The current mods directories
 	 */
-	Path getModsDir();
+	Collection<Path> getModsDirs();
 
 	/**
 	 * Query whether this loader is currently running in a development environment.
@@ -94,7 +102,14 @@ public interface FrogLoader {
 	 *
 	 * @return A collection of all loaded mods
 	 * @see ModProperties
-	 * @see FrogPlugin
+	 * @see ModProvider
 	 */
 	Collection<ModProperties> getMods();
+
+	/**
+	 * Get the version of the currently loaded game
+	 *
+	 * @return The current game version
+	 */
+	String getGameVersion();
 }

src/main/java/dev/frogmc/frogloader/api/mod/ModExtensions.java

@@ -3,8 +3,8 @@ package dev.frogmc.frogloader.api.mod;
 import java.lang.invoke.MethodHandle;
 import java.lang.invoke.MethodHandles;
 import java.lang.invoke.MethodType;
-import java.util.Map;
 import java.util.Collection;
+import java.util.Map;
 import java.util.function.Consumer;
 
 import org.slf4j.Logger;
@@ -70,10 +70,13 @@ public final class ModExtensions {
 	 * @param action the action to run on the value of the extension if it is present
 	 * @param <T>    The type of the value of this extension
 	 */
+	@SuppressWarnings({"rawtypes", "unchecked"})
 	public <T> void runIfPresent(String key, Consumer<T> action) {
-		T value = get(key);
-		if (value != null) {
-			action.accept(value);
+		Object value = get(key);
+		if (value instanceof Collection c){
+			((Collection<T>)c).forEach(action);
+		} else if (value != null) {
+			action.accept((T)value);
 		}
 	}
 

src/main/java/dev/frogmc/frogloader/api/mod/ModProperties.java

@@ -79,6 +79,7 @@ public interface ModProperties {
 
 	/**
 	 * Get this mod's paths
+	 *
 	 * @return Where this mod is loaded from
 	 */
 	Collection<Path> paths();

src/main/java/dev/frogmc/frogloader/api/plugin/FrogPlugin.java

@@ -1,57 +0,0 @@
-package dev.frogmc.frogloader.api.plugin;
-
-import java.util.Collection;
-import java.util.Collections;
-
-import dev.frogmc.frogloader.api.FrogLoader;
-import dev.frogmc.frogloader.api.mod.ModProperties;
-
-/**
- * A Plugin that may load mods for a specific game and environment
- *
- * @see FrogLoader
- */
-public interface FrogPlugin {
-
-	/**
-	 * General run method of this plugin. This method is run after all plugins have been initialized.
-	 *
-	 * @see FrogPlugin#init(FrogLoader)
-	 * @see FrogPlugin#getMods()
-	 */
-	default void run() {
-	}
-
-	/**
-	 * Check whether this plugin is applicable for the current environment
-	 *
-	 * @return Whether this plugin is applicable to be loaded in the current environment
-	 */
-	default boolean isApplicable() {
-		return false;
-	}
-
-	/**
-	 * Initialization method for this plugin. This method will be called after <code>isApplicable()</code>
-	 * if it returns true to initialize is plugin.
-	 *
-	 * @param loader the loader loading this plugin
-	 * @throws Exception This method may throw any exception, it will be handled by the loader.
-	 * @see FrogPlugin#isApplicable()
-	 * @see FrogPlugin#getMods()
-	 */
-	default void init(FrogLoader loader) throws Exception {
-	}
-
-	/**
-	 * This method should return all mods loaded by this plugin. It will be queried after <code>init(FrogLoader)</code>
-	 * and before <code>run()</code>.
-	 *
-	 * @return A collection of mods loaded by this plugin.
-	 * @see FrogPlugin#init(FrogLoader)
-	 * @see FrogPlugin#run()
-	 */
-	default Collection<ModProperties> getMods() {
-		return Collections.emptySet();
-	}
-}

src/main/java/dev/frogmc/frogloader/api/plugin/GamePlugin.java

@@ -0,0 +1,52 @@
+package dev.frogmc.frogloader.api.plugin;
+
+import dev.frogmc.frogloader.api.FrogLoader;
+import dev.frogmc.frogloader.api.mod.ModProperties;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * A plugin responsible for loading a game.
+ * Only one of these may be loaded at a time.
+ * @see FrogLoader
+ * @see	 ModProvider
+ */
+public interface GamePlugin {
+	/**
+	 * Method to launch the game.
+	 * This method will be called after mods are located and loaded.
+	 */
+	default void run() {
+	}
+
+	/**
+	 * Whether this plugin is applicable to be loaded in the current environment.
+	 * Only one plugin may be applicable at a time.
+	 * @return Whether this plugin is applicable to be loaded
+	 */
+	default boolean isApplicable() {
+		return false;
+	}
+
+	/**
+	 * Initialize this plugin.
+	 * @param loader The loader currently loading this plugin
+	 * @throws Exception If an exception occurs during initialization. It will be handled by the loader.
+	 */
+	default void init(FrogLoader loader) throws Exception {
+	}
+
+	/**
+	 * Queries the version of the game of this plugin.
+	 * @return The version of the game loaded by this plugin
+	 */
+	@NotNull
+	String queryVersion();
+
+	/**
+	 * Get the mod embodying the game loaded by this plugin.
+	 * @return A mod for the currently loaded game. May be null if no such mod shall be added.
+	 */
+	default ModProperties getGameMod() {
+		return null;
+	}
+}

src/main/java/dev/frogmc/frogloader/api/plugin/ModProvider.java

@@ -0,0 +1,85 @@
+package dev.frogmc.frogloader.api.plugin;
+
+import java.net.URL;
+import java.nio.file.Path;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.function.Consumer;
+
+import dev.frogmc.frogloader.api.mod.ModProperties;
+import dev.frogmc.frogloader.api.FrogLoader;
+
+/**
+ * A provider for mods to be loaded.
+ * @see	FrogLoader
+ * @see GamePlugin
+ * @see ModProperties
+ */
+public interface ModProvider {
+
+	/**
+	 * Get the ID of this provider. Mods will be stored separated by their provider ID.
+	 * @return The ID of this provider
+	 */
+	String id();
+
+	/**
+	 * The directory to search in for mods. This will be resolved relative to the game directory.
+	 * @return The name of the mods directory, relative to the game directory
+	 */
+	default String loadDirectory() {
+		return "mods";
+	}
+
+	/**
+	 * Whether this provider is applicable to load in the current environment.
+	 * @return Whether this provider is applicable to load
+	 */
+	default boolean isApplicable() {
+		return false;
+	}
+
+	/**
+	 * Whether a mod file is valid to be loaded by this provider.
+	 * @param path The path to validate
+	 * @return Whether this path is valid to be loaded by this provider
+	 * @see #isDirectoryApplicable(Path)
+	 * @see #loadDirectory()
+	 */
+	default boolean isFileApplicable(Path path) {
+		return false;
+	}
+
+	/**
+	 * Whether a directory (inside the path declared by this provider's mod directory) is valid to be queried for mods
+	 * to be loaded by this provider.
+	 * @param path The directory to be validated
+	 * @return Whether this directory should be traversed further
+	 * @see	#loadDirectory()
+	 * @see #isFileApplicable(Path)
+	 */
+	default boolean isDirectoryApplicable(Path path) {
+		return false;
+	}
+
+	/**
+	 * This method will be invoked just before the game is launched. It may be used for a pre-launch entrypoint for mods.
+	 * @param mods The mods loaded by this provider
+	 */
+	default void preLaunch(Collection<ModProperties> mods) {
+	}
+
+	/**
+	 * This method should load the mods found previously into their runtime representation.
+	 * This method should also load any nested mods
+	 * <p>Note: This method also needs to add mods to the classpath for them to be loaded correctly. For this, a parameter is provided.</p>
+	 *
+	 * @param modFiles The paths to be loaded by this provider
+	 * @param classpathAdder A consumer to easily add URLs to the classpath used to run the game on
+	 * @return Mods loaded by this provider
+	 * @throws Exception If an exception occurs during loading. It will be handled by the loader.
+	 */
+	default Collection<ModProperties> loadMods(Collection<Path> modFiles, Consumer<URL> classpathAdder) throws Exception {
+		return Collections.emptySet();
+	}
+}

src/main/java/dev/frogmc/frogloader/impl/FrogLoaderImpl.java

@@ -14,7 +14,8 @@ import com.google.gson.Gson;
 import dev.frogmc.frogloader.api.FrogLoader;
 import dev.frogmc.frogloader.api.env.Env;
 import dev.frogmc.frogloader.api.mod.ModProperties;
-import dev.frogmc.frogloader.api.plugin.FrogPlugin;
+import dev.frogmc.frogloader.api.plugin.GamePlugin;
+import dev.frogmc.frogloader.api.plugin.ModProvider;
 import dev.frogmc.frogloader.impl.gui.LoaderGui;
 import dev.frogmc.frogloader.impl.launch.MixinClassLoader;
 import dev.frogmc.frogloader.impl.mod.ModUtil;
@@ -26,30 +27,31 @@ import org.slf4j.LoggerFactory;
 import org.spongepowered.asm.mixin.MixinEnvironment;
 
 public class FrogLoaderImpl implements FrogLoader {
-	public static final String MOD_FILE_EXTENSION = ".frogmod";
+
 	private static final boolean DEV_ENV = Boolean.getBoolean(SystemProperties.DEVELOPMENT);
+	private static final Logger LOGGER = LoggerFactory.getLogger("FrogLoader");
 	@Getter
 	private static FrogLoaderImpl instance;
 	@Getter
 	private final String[] args;
 	@Getter
 	private final Env env;
-	private final Logger LOGGER = LoggerFactory.getLogger("FrogLoader");
-
 	@Getter
-	private final List<FrogPlugin> plugins = new ArrayList<>();
-
+	private final Collection<ModProvider> modProviders = new ArrayList<>();
 	@Getter
-	private final Path gameDir, configDir, modsDir;
-
+	private final Path gameDir, configDir;
+	@Getter
+	private final Collection<Path> modsDirs = new HashSet<>();
 	@Getter
 	private final MixinClassLoader classloader;
-
 	@Getter
 	private final Gson gson = new Gson();
-
-	private Map<String, ModProperties> mods;
-	private Collection<String> modIds;
+	private final Map<String, Map<String, ModProperties>> mods = new HashMap<>();
+	@Getter
+	private GamePlugin gamePlugin;
+	@Getter
+	private String gameVersion;
+	private Collection<String> modIds = new ArrayList<>();
 
 
 	private FrogLoaderImpl(String[] args, Env env) {
@@ -60,26 +62,26 @@ public class FrogLoaderImpl implements FrogLoader {
 
 		gameDir = Paths.get(getArgumentOrElse("gameDir", "."));
 		configDir = gameDir.resolve("config");
-		modsDir = gameDir.resolve("mods");
 
 		try {
 			Files.createDirectories(gameDir);
 			Files.createDirectories(configDir);
-			Files.createDirectories(modsDir);
 		} catch (IOException e) {
 			LOGGER.warn("Failed to create essential directories ", e);
 		}
 
 		try {
-			discoverPlugins();
+			loadGamePlugin();
+			loadModProviders();
+			modProviders.stream().map(ModProvider::loadDirectory).map(gameDir::resolve).forEach(modsDirs::add);
 			advanceMixinState();
-			mods = collectMods();
 			modIds = collectModIds();
-			LOGGER.info(ModUtil.getModList(mods.values()));
+			LOGGER.info(ModUtil.getModList(getMods()));
 			LOGGER.info("Launching...");
-			plugins.forEach(FrogPlugin::run);
+			modProviders.forEach(plugin -> plugin.preLaunch(mods.get(plugin.id()).values()));
+			gamePlugin.run();
 		} catch (Throwable t) {
-			LoaderGui.execReport(CrashReportGenerator.writeReport(t, collectMods().values()), false);
+			LoaderGui.execReport(CrashReportGenerator.writeReport(t, getMods()), false);
 		}
 	}
 
@@ -102,22 +104,19 @@ public class FrogLoaderImpl implements FrogLoader {
 		}
 	}
 
-	private void discoverPlugins() {
-		ServiceLoader.load(FrogPlugin.class).forEach(plugin -> {
-			try {
-				if (plugin.isApplicable()) {
-					plugin.init(this);
-					plugins.add(plugin);
+	private void loadGamePlugin() {
+		GamePlugin plugin = PluginLoader.discoverGamePlugins();
+		gameVersion = plugin.queryVersion();
+		ModProperties gameMod = plugin.getGameMod();
+		if (gameMod != null) {
+			mods.put("integrated", Map.of(gameMod.id(), gameMod));
+			modIds.add(gameMod.id());
 		}
-			} catch (Throwable e) {
-				LOGGER.error("Error during plugin initialisation: ", e);
-				throw new RuntimeException(e);
+		gamePlugin = plugin;
 	}
-		});
 
-		if (plugins.isEmpty()) {
-			throw new IllegalStateException("No plugin applicable to the current state was found!");
-		}
+	private void loadModProviders() throws Exception {
+		PluginLoader.discoverModProviders(gameDir, mods, modIds, modProviders);
 	}
 
 	public String getArgument(String name) {
@@ -149,20 +148,15 @@ public class FrogLoaderImpl implements FrogLoader {
 
 	@Override
 	public Optional<ModProperties> getModProperties(String id) {
-		return Optional.ofNullable(mods.get(id));
-	}
-
-	private Map<String, ModProperties> collectMods() {
-		return plugins.stream().map(FrogPlugin::getMods).flatMap(Collection::stream)
-				.collect(Collectors.toMap(ModProperties::id, m -> m));
+		return mods.values().stream().flatMap(m -> m.values().stream()).filter(m -> m.id().equals(id)).findFirst();
 	}
 
 	private Collection<String> collectModIds() {
-		return mods.keySet();
+		return mods.values().stream().flatMap(m -> m.keySet().stream()).collect(Collectors.toSet());
 	}
 
 	@Override
 	public Collection<ModProperties> getMods() {
-		return mods.values();
+		return mods.values().stream().map(Map::values).flatMap(Collection::stream).collect(Collectors.toSet());
 	}
 }

src/main/java/dev/frogmc/frogloader/impl/PluginLoader.java

@@ -0,0 +1,104 @@
+package dev.frogmc.frogloader.impl;
+
+import java.nio.file.Path;
+import java.util.*;
+
+import dev.frogmc.frogloader.api.FrogLoader;
+import dev.frogmc.frogloader.api.mod.ModProperties;
+import dev.frogmc.frogloader.api.plugin.GamePlugin;
+import dev.frogmc.frogloader.api.plugin.ModProvider;
+import dev.frogmc.frogloader.impl.gui.LoaderGui;
+import dev.frogmc.frogloader.impl.mixin.AWProcessor;
+import dev.frogmc.frogloader.impl.mod.BuiltinExtensions;
+import dev.frogmc.frogloader.impl.mod.ModDependencyResolver;
+import dev.frogmc.frogloader.impl.util.CrashReportGenerator;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.spongepowered.asm.mixin.Mixins;
+
+public class PluginLoader {
+	private static final Logger LOGGER = LoggerFactory.getLogger("FrogLoader/Plugins");
+
+	public static void discoverModProviders(Path gameDir, Map<String, Map<String, ModProperties>> mods, Collection<String> modIds, Collection<ModProvider> modProviders) throws ModDependencyResolver.ResolverException {
+		LOGGER.info("Discovering mod providers...");
+
+		List<ModProvider> providers = new ArrayList<>(ServiceLoader.load(ModProvider.class).stream().map(ServiceLoader.Provider::get).toList()); // we need mutability & random access
+		Map<String, Collection<ModProperties>> properties = new HashMap<>();
+		int[] size = new int[providers.size()]; // use a separate size variable to not have to iterate over the list over and over again
+		for (int i = 0; i < size[0]; i++) {
+			ModProvider plugin = providers.get(i); // use random access to work around concurrent access (through modifications during iteration)
+			LOGGER.debug("Found mod provider: {}", plugin.getClass().getName());
+			if (!plugin.isApplicable()) {
+				continue;
+			}
+			try {
+				LOGGER.debug("Initialising mod provider: {}", plugin.id());
+				Collection<ModProperties> loadedMods = plugin.loadMods(Discovery.find(gameDir.resolve(plugin.loadDirectory()),
+								plugin::isDirectoryApplicable,
+								plugin::isFileApplicable),
+						FrogLoaderImpl.getInstance().getClassloader()::addURL);
+				initializeModMixins(loadedMods);
+				AWProcessor.load(loadedMods);
+
+				properties.put(plugin.id(), loadedMods);
+
+				LOGGER.debug("Loaded {} mod(s) from provider: {}", loadedMods.size(), plugin.id());
+				loadedMods.forEach(p -> p.extensions().runIfPresent(BuiltinExtensions.MOD_PROVIDER, ModProvider.class, provider -> {
+					providers.add(provider);
+					size[0]++;
+				}));
+			} catch (Throwable e) {
+				LOGGER.error("Error during plugin initialisation: ", e);
+			}
+		}
+
+		Collection<ModProperties> flattened = properties.values().stream().flatMap(Collection::stream).toList();
+		try {
+			Collection<ModProperties> solved = new ModDependencyResolver(flattened).solve();
+			properties.forEach((s, c) -> c.retainAll(solved));
+			properties.forEach((s, c) -> {
+				Map<String, ModProperties> map = mods.computeIfAbsent(s, u -> new HashMap<>());
+				c.forEach(p -> map.put(p.id(), p));
+			});
+			modIds.addAll(solved.stream().map(ModProperties::id).toList());
+			modProviders.addAll(providers);
+		} catch (ModDependencyResolver.UnfulfilledDependencyException e) {
+			LoaderGui.execUnfulfilledDep(CrashReportGenerator.writeReport(e, flattened), e, false);
+		} catch (ModDependencyResolver.BreakingModException e) {
+			LoaderGui.execBreakingDep(CrashReportGenerator.writeReport(e, flattened), e, false);
+		}
+	}
+
+	@SuppressWarnings({"rawtypes", "unchecked"})
+	private static void initializeModMixins(Collection<ModProperties> loadedMods) {
+		loadedMods.forEach(props -> {
+			Object o = props.extensions().get(BuiltinExtensions.MIXIN_CONFIG);
+			if (o instanceof String name) {
+				Mixins.addConfiguration(name);
+			} else if (o instanceof Collection l) {
+				((Collection<String>) l).forEach(Mixins::addConfiguration);
+			}
+		});
+	}
+
+	public static GamePlugin discoverGamePlugins() {
+		LOGGER.info("Discovering game plugins...");
+		GamePlugin[] applicablePlugins = ServiceLoader.load(GamePlugin.class).stream().map(ServiceLoader.Provider::get)
+				.peek(p -> LOGGER.debug("Found game plugin: {}", p.getClass().getName()))
+				.filter(GamePlugin::isApplicable).toArray(GamePlugin[]::new);
+		if (applicablePlugins.length > 1) {
+			throw new IllegalStateException("Multiple applicable game plugins found!");
+		} else if (applicablePlugins.length == 0) {
+			throw new IllegalStateException("No applicable game plugin found!");
+		}
+
+		GamePlugin plugin = applicablePlugins[0]; // we can skip the loop as we always will only have one element
+		try {
+			plugin.init(FrogLoader.getInstance());
+			return plugin;
+		} catch (Throwable e) {
+			LOGGER.error("Error during plugin initialisation: ", e);
+			throw new RuntimeException(e);
+		}
+	}
+}

src/main/java/dev/frogmc/frogloader/impl/gui/component/DependencyErrorEntry.java

@@ -1,14 +1,16 @@
 package dev.frogmc.frogloader.impl.gui.component;
 
-import dev.frogmc.frogloader.impl.mod.ModDependencyResolver;
-import org.jetbrains.annotations.Nullable;
-
+import javax.imageio.ImageIO;
 import javax.swing.*;
 import javax.swing.plaf.basic.BasicBorders;
 import java.awt.*;
 import java.awt.event.ActionListener;
+import java.io.IOException;
 import java.net.URL;
 
+import dev.frogmc.frogloader.impl.mod.ModDependencyResolver;
+import org.jetbrains.annotations.Nullable;
+
 public class DependencyErrorEntry extends JPanel {
 
 	private final JPanel actions;
@@ -28,17 +30,29 @@ public class DependencyErrorEntry extends JPanel {
 		desc.setText("<html>" + description.replace("<", "&lt;").replace("\n", "<br>") + "</html>");
 		text.add(desc);
 
-        add(text, BorderLayout.NORTH);
+		Box top = Box.createHorizontalBox();
+		add(top, BorderLayout.NORTH);
+
+		if (icon != null) {
+			URL location = getClass().getResource("/"+icon);
+
+			if (location != null) {
+				try {
+					int size = 100;
+					Image image = ImageIO.read(location).getScaledInstance(size, size, Image.SCALE_SMOOTH);
+					Box container = Box.createVerticalBox();
+					container.add(new JLabel(new ImageIcon(image)));
+					container.add(Box.createVerticalGlue());
+					top.add(container);
+				} catch (IOException ignored) {
+				}
+			}
+		}
+
+		top.add(text);
 
 		this.actions = new JPanel(new FlowLayout(FlowLayout.LEFT));
 		add(this.actions, BorderLayout.SOUTH);
-
-        if (icon != null) {
-            URL location = getClass().getResource(icon);
-
-            if (location != null)
-                add(new JLabel(new ImageIcon(location)), BorderLayout.WEST);
-        }
 	}
 
 	public void addAction(String label, ActionListener listener) {

src/main/java/dev/frogmc/frogloader/impl/gui/page/BreakingDepPage.java

@@ -1,12 +1,12 @@
 package dev.frogmc.frogloader.impl.gui.page;
 
-import dev.frogmc.frogloader.impl.gui.component.DependencyErrorEntry;
-import dev.frogmc.frogloader.impl.mod.ModDependencyResolver;
-
 import javax.swing.*;
 import java.awt.*;
 import java.util.Objects;
 
+import dev.frogmc.frogloader.impl.gui.component.DependencyErrorEntry;
+import dev.frogmc.frogloader.impl.mod.ModDependencyResolver;
+
 public class BreakingDepPage extends JScrollPane {
 
 	public BreakingDepPage(ModDependencyResolver.BreakingModException ex) {

src/main/java/dev/frogmc/frogloader/impl/gui/page/UnfulfilledDepPage.java

@@ -1,15 +1,15 @@
 package dev.frogmc.frogloader.impl.gui.page;
 
-import dev.frogmc.frogloader.impl.gui.component.DependencyErrorEntry;
-import dev.frogmc.frogloader.impl.mod.ModDependencyResolver;
-import dev.frogmc.frogloader.impl.util.PlatformUtil;
-
 import javax.swing.*;
 import java.awt.*;
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.util.Objects;
 
+import dev.frogmc.frogloader.impl.gui.component.DependencyErrorEntry;
+import dev.frogmc.frogloader.impl.mod.ModDependencyResolver;
+import dev.frogmc.frogloader.impl.util.PlatformUtil;
+
 public class UnfulfilledDepPage extends JScrollPane {
 
 	public UnfulfilledDepPage(ModDependencyResolver.UnfulfilledDependencyException ex) {

src/main/java/dev/frogmc/frogloader/impl/mod/BuiltinExtensions.java

@@ -9,4 +9,5 @@ public class BuiltinExtensions {
 	public final String PRE_LAUNCH = "prelaunch";
 	public final String ACCESSWIDENER = "accesswidener";
 	public final String LOADING_TYPE = "loading_type";
+	public final String MOD_PROVIDER = "modprovider";
 }

src/main/java/dev/frogmc/frogloader/impl/mod/ModDependencyResolver.java

@@ -6,7 +6,8 @@ import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 
-import com.google.common.collect.*;
+import com.google.common.collect.Multimap;
+import com.google.common.collect.MultimapBuilder;
 import dev.frogmc.frogloader.api.mod.ModDependencies;
 import dev.frogmc.frogloader.api.mod.ModProperties;
 import dev.frogmc.frogloader.api.mod.SemVer;
@@ -229,18 +230,10 @@ public class ModDependencyResolver {
 				throw new IllegalArgumentException(comparator);
 			}
 			var type = DependencyType.of(matcher.group(1));
-			StringBuilder version = new StringBuilder(matcher.group(2));
-
-			while (version.length() < 5) {
-				if (version.charAt(version.length() - 1) == '.') {
-					version.append('0');
-				} else {
-					version.append('.');
-				}
-			}
+			var version = matcher.group(2);
 
 			try {
-				return new Comparator(type, SemVerImpl.parse(version.toString()));
+				return new Comparator(type, SemVerImpl.parse(version));
 			} catch (SemVerParseException e) {
 				throw new UncheckedIOException(e);
 			}
@@ -324,6 +317,7 @@ public class ModDependencyResolver {
 	public record VersionRange(Collection<ComparatorSet> sets) {
 
 		private static final Pattern NUMBER_EXTRACTOR = Pattern.compile("[^~]?(\\d+)(?:\\.(?:([\\dxX*]+)(?:\\.([\\dxX*]+)?)?)?)?(.*)");
+		private static final Pattern FILL_PATTERN = Pattern.compile("[><=]+(\\d+)\\.?(\\d+)?\\.?(\\d+)?");
 
 		public static VersionRange parse(String range) throws ResolverException {
 
@@ -364,13 +358,7 @@ public class ModDependencyResolver {
 		private static void handleTilde(String s, List<String> ranges) throws ResolverException {
 			{
 				StringBuilder builder = new StringBuilder(">=" + s.substring(1));
-				while (builder.length() < 7) {
-					if (builder.charAt(builder.length() - 1) == '.') {
-						builder.append('0');
-					} else {
-						builder.append('.');
-					}
-				}
+				fillVersion(builder);
 				ranges.add(builder.toString());
 			}
 			ranges.add(" ");
@@ -392,13 +380,7 @@ public class ModDependencyResolver {
 		private static void handleXRanges(String s, List<String> ranges) throws ResolverException {
 			{
 				StringBuilder builder = new StringBuilder(">=" + s.replaceAll("[xX*]", "0"));
-				while (builder.length() < 7) {
-					if (builder.charAt(builder.length() - 1) == '.') {
-						builder.append('0');
-					} else {
-						builder.append('.');
-					}
-				}
+				fillVersion(builder);
 				ranges.add(builder.toString());
 			}
 
@@ -423,13 +405,7 @@ public class ModDependencyResolver {
 						break;
 					}
 				}
-				while (builder.length() < 6) {
-					if (builder.charAt(builder.length() - 1) == '.') {
-						builder.append('0');
-					} else {
-						builder.append('.');
-					}
-				}
+				fillVersion(builder);
 				ranges.add(builder.toString());
 			}
 		}
@@ -455,26 +431,21 @@ public class ModDependencyResolver {
 					break;
 				}
 			}
-			while (builder.length() < 6) {
+			fillVersion(builder);
+			/*while (builder.length() < 6) {
 				if (builder.charAt(builder.length() - 1) == '.') {
 					builder.append('0');
 				} else {
 					builder.append('.');
 				}
-			}
+			}*/
 			ranges.add(builder.toString());
 		}
 
 		private static void handleHyphenRange(String s, List<String> ranges, String end) throws ResolverException {
 			{
 				StringBuilder builder = new StringBuilder(">=" + s);
-				while (builder.length() < 7) {
-					if (builder.charAt(builder.length() - 1) == '.') {
-						builder.append('0');
-					} else {
-						builder.append('.');
-					}
-				}
+				fillVersion(builder);
 				ranges.add(builder.toString());
 				ranges.add(" ");
 			}
@@ -498,19 +469,35 @@ public class ModDependencyResolver {
 						break;
 					}
 				}
-				while (builder.length() < 6) {
-					if (builder.charAt(builder.length() - 1) == '.') {
-						builder.append('0');
-					} else {
-						builder.append('.');
-					}
-				}
+				fillVersion(builder);
 				ranges.add(builder.toString());
 			} else {
 				ranges.add("<=" + end);
 			}
 		}
 
+		private static void fillVersion(StringBuilder builder) {
+			Matcher matcher = FILL_PATTERN.matcher(builder);
+			if (!matcher.find()) {
+				return;
+			}
+
+			if (matcher.group(3) != null) {
+				return;
+			}
+
+			if (builder.charAt(builder.length() - 1) != '.') {
+				builder.append(".");
+			}
+
+			if (matcher.group(2) == null) {
+				builder.append("0.0");
+				return;
+			}
+
+			builder.append("0");
+		}
+
 		private static @NotNull List<String> extractRanges(String range) {
 			if (!range.contains(" ") && !range.contains(" - ") && !range.contains("||")) {
 				return List.of(range);

src/main/java/dev/frogmc/frogloader/impl/mod/ModUtil.java

@@ -60,7 +60,7 @@ public class ModUtil {
 					}
 				}
 			} else {
-				children.computeIfAbsent(mod, m -> new HashSet<>());
+				children.putIfAbsent(mod, Collections.emptySet());
 			}
 		}
 

src/main/java/dev/frogmc/frogloader/impl/plugin/game/minecraft/Minecraft.java

@@ -1,244 +0,0 @@
-package dev.frogmc.frogloader.impl.plugin.game.minecraft;
-
-import java.io.File;
-import java.io.IOException;
-import java.lang.invoke.MethodHandle;
-import java.lang.invoke.MethodHandles;
-import java.lang.invoke.MethodType;
-import java.net.MalformedURLException;
-import java.nio.file.*;
-import java.nio.file.attribute.BasicFileAttributes;
-import java.util.*;
-
-import com.electronwill.nightconfig.core.UnmodifiableConfig;
-import com.google.gson.JsonObject;
-import dev.frogmc.frogloader.api.FrogLoader;
-import dev.frogmc.frogloader.api.extensions.PreLaunchExtension;
-import dev.frogmc.frogloader.api.mod.ModDependencies;
-import dev.frogmc.frogloader.api.mod.ModExtensions;
-import dev.frogmc.frogloader.api.mod.ModProperties;
-import dev.frogmc.frogloader.api.plugin.FrogPlugin;
-import dev.frogmc.frogloader.impl.Discovery;
-import dev.frogmc.frogloader.impl.FrogLoaderImpl;
-import dev.frogmc.frogloader.impl.gui.LoaderGui;
-import dev.frogmc.frogloader.impl.mixin.AWProcessor;
-import dev.frogmc.frogloader.impl.mod.*;
-import dev.frogmc.frogloader.impl.util.CrashReportGenerator;
-import dev.frogmc.frogloader.impl.util.SystemProperties;
-import dev.frogmc.thyroxine.Thyroxine;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.spongepowered.asm.mixin.Mixins;
-
-public class Minecraft implements FrogPlugin {
-
-	protected static final String[] MINECRAFT_CLASSES = new String[]{
-			"net/minecraft/client/main/Main.class",
-			"net/minecraft/client/MinecraftApplet.class",
-			"net/minecraft/server/Main.class"
-	};
-	private static final Logger LOGGER = LoggerFactory.getLogger("Plugin/Minecraft");
-	protected final Collection<ModProperties> modProperties = new ArrayList<>();
-	protected Path gamePath;
-	protected String foundMainClass;
-	private String version;
-
-	@Override
-	public boolean isApplicable() {
-		gamePath = findGame();
-		return gamePath != null;
-	}
-
-	@SuppressWarnings({"rawtypes", "unchecked"})
-	@Override
-	public void init(FrogLoader loader) throws Exception {
-		if (gamePath == null) {
-			throw new IllegalStateException("Game not found yet!");
-		}
-		Path remappedGamePath = loader.getGameDir().resolve(".frogmc/remappedJars").resolve(version).resolve("game-" + version + "-remapped.jar");
-
-		if (!Files.exists(remappedGamePath.getParent())) {
-			try {
-				Files.createDirectories(remappedGamePath.getParent());
-			} catch (IOException e) {
-				LOGGER.error("Failed to create directory", e);
-			}
-		}
-
-		modProperties.add(JavaModProperties.get());
-		modProperties.add(new ModPropertiesImpl("minecraft", "Minecraft", "/assets/minecraft/textures/block/grass_block_side.png",
-				MinecraftSemVerImpl.get(version), "MC-EULA",
-				Map.of("Mojang AB", Collections.singleton("Author")),
-				new ModDependencies(Collections.emptySet(), Collections.emptySet(), Collections.emptySet(), Collections.emptySet()),
-				ModExtensions.of(Collections.emptyMap()), Collections.emptySet()));
-
-		Collection<Path> mods = Discovery.find(loader.getModsDir(), path ->
-				version.equals(path.getFileName().toString()), path ->
-				path.getFileName().toString().endsWith(FrogLoaderImpl.MOD_FILE_EXTENSION));
-		this.getClass().getClassLoader().resources(ModPropertiesReader.PROPERTIES_FILE_NAME).map(ModPropertiesReader::readFile)
-				.map(o -> o.orElse(null)).filter(Objects::nonNull).forEach(modProperties::add);
-
-		Map<Path, ModProperties> modPaths = new HashMap<>();
-		Path jijCache = getJijCacheDir();
-		for (Path mod : new HashSet<>(mods)) {
-			findJiJMods(mod, mods, modPaths, jijCache);
-		}
-
-		try {
-			modProperties.retainAll(new ModDependencyResolver(modProperties).solve());
-		} catch (ModDependencyResolver.BreakingModException e) {
-			LoaderGui.execBreakingDep(CrashReportGenerator.writeReport(e, modProperties), e, false);
-		} catch (ModDependencyResolver.UnfulfilledDependencyException e) {
-			LoaderGui.execUnfulfilledDep(CrashReportGenerator.writeReport(e, modProperties), e, false);
-		}
-
-		mods.stream().filter(p -> modProperties.contains(modPaths.get(p))).map(path -> {
-			try {
-				return path.toUri().toURL();
-			} catch (MalformedURLException e) {
-				LOGGER.warn("Failed to resolve url for {}", path, e);
-				return null;
-			}
-		}).filter(Objects::nonNull).forEach(FrogLoaderImpl.getInstance().getClassloader()::addURL);
-
-		modProperties.forEach(props -> {
-			Object o = props.extensions().get(BuiltinExtensions.MIXIN_CONFIG);
-			if (o instanceof String name) {
-				Mixins.addConfiguration(name);
-			} else if (o instanceof Collection l) {
-				((Collection<String>) l).forEach(Mixins::addConfiguration);
-			}
-		});
-
-		if (!loader.isDevelopment()) {
-			if (!Files.exists(remappedGamePath)) {
-				Thyroxine.run(version, gamePath, remappedGamePath, true, false);
-			}
-		}
-
-		AWProcessor.load(modProperties);
-
-		var runtimePath = loader.isDevelopment() ? gamePath : remappedGamePath;
-		FrogLoaderImpl.getInstance().getClassloader().addURL(runtimePath.toUri().toURL());
-	}
-
-	protected void findJiJMods(Path mod, Collection<Path> mods, Map<Path, ModProperties> modPaths, Path jijCache) throws IOException {
-		Optional<ModProperties> opt = ModPropertiesReader.read(mod);
-		if (opt.isPresent()) {
-			ModProperties p = opt.get();
-			modProperties.add(p);
-			modPaths.put(mod, p);
-			List<List<UnmodifiableConfig>> entries = p.extensions().getOrDefault(BuiltinExtensions.INCLUDED_JARS, Collections.emptyList());
-			if (entries.isEmpty()) {
-				return;
-			}
-			try (FileSystem fs = FileSystems.newFileSystem(mod)) {
-				for (List<UnmodifiableConfig> jars : entries) {
-					for (UnmodifiableConfig jar : jars) {
-						Path path = fs.getPath(jar.get("path")).toAbsolutePath();
-						Path extracted = jijCache.resolve((String) jar.get("id"));
-						if (!Files.exists(extracted)){
-							Files.createDirectories(jijCache);
-							Files.copy(path, extracted);
-						}
-						mods.add(extracted);
-						findJiJMods(extracted, mods, modPaths, jijCache);
-					}
-				}
-			}
-		}
-	}
-
-	private Path getJijCacheDir(){
-		Path dir = FrogLoader.getInstance().getGameDir().resolve(".frogmc").resolve("jijcache");
-
-		Runtime.getRuntime().addShutdownHook(new Thread(() -> {
-			try {
-				Files.walkFileTree(dir, new SimpleFileVisitor<>(){
-					@Override
-					public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
-						Files.delete(file);
-						return super.visitFile(file, attrs);
-					}
-
-					@Override
-					public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
-						Files.delete(dir);
-						return super.postVisitDirectory(dir, exc);
-					}
-				});
-			} catch (IOException e) {
-				LOGGER.error("Failed to clear extracted jij mods!", e);
-			}
-		}));
-
-		return dir;
-	}
-
-	@Override
-	public Collection<ModProperties> getMods() {
-		return modProperties;
-	}
-
-	protected Path findGame() {
-		LOGGER.info("Locating game..");
-		String jar = System.getProperty(SystemProperties.MINECRAFT_GAME_JAR);
-		if (jar != null) {
-			Path p = Paths.get(jar);
-			if (checkLocation(p)) {
-				return p;
-			}
-		}
-
-		for (String s : System.getProperty("java.class.path", "").split(File.pathSeparator)) {
-			Path p = Paths.get(s);
-			if (checkLocation(p)) {
-				return p;
-			}
-		}
-		LOGGER.warn("Could not locate game!");
-		return null;
-	}
-
-	protected boolean checkLocation(Path jar) {
-		if (!Files.exists(jar) || Files.isDirectory(jar)) {
-			return false;
-		}
-		try (FileSystem fs = FileSystems.newFileSystem(jar)) {
-			for (String n : MINECRAFT_CLASSES) {
-				if (Files.exists(fs.getPath(n)) && n.contains(FrogLoaderImpl.getInstance().getEnv().getIdentifier())) {
-					LOGGER.info("Found game: {}", jar);
-					foundMainClass = n.substring(0, n.length() - 6).replace("/", ".");
-					try {
-						version = FrogLoaderImpl.getInstance().getGson().fromJson(Files.readString(fs.getPath("version.json")), JsonObject.class).get("id").getAsString();
-					} catch (Exception e){
-						version = FrogLoaderImpl.getInstance().getArgument("version");
-					}
-					return true;
-				}
-			}
-		} catch (IOException e) {
-			throw new RuntimeException(e);
-		}
-		return false;
-	}
-
-	@Override
-	public void run() {
-		try {
-			if (foundMainClass != null) {
-				modProperties.forEach(props ->
-						props.extensions().runIfPresent(PreLaunchExtension.ID,
-								PreLaunchExtension.class, PreLaunchExtension::onPreLaunch));
-				LOGGER.info("Launching main class: {}", foundMainClass);
-				Class<?> mainClass = Class.forName(foundMainClass);
-				MethodHandle main = MethodHandles.publicLookup().findStatic(mainClass, "main", MethodType.methodType(void.class, String[].class));
-				main.invoke((Object) FrogLoaderImpl.getInstance().getArgs());
-			} else {
-				LOGGER.warn("Failed to locate main class!");
-			}
-		} catch (Throwable e) {
-			throw new RuntimeException(e);
-		}
-	}
-}

src/main/java/dev/frogmc/frogloader/impl/plugin/game/minecraft/MinecraftGamePlugin.java

@@ -0,0 +1,141 @@
+package dev.frogmc.frogloader.impl.plugin.game.minecraft;
+
+import java.io.File;
+import java.io.IOException;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.nio.file.*;
+import java.util.Collections;
+import java.util.Map;
+
+import com.google.gson.JsonObject;
+import dev.frogmc.frogloader.api.FrogLoader;
+import dev.frogmc.frogloader.api.mod.ModDependencies;
+import dev.frogmc.frogloader.api.mod.ModExtensions;
+import dev.frogmc.frogloader.api.mod.ModProperties;
+import dev.frogmc.frogloader.api.plugin.GamePlugin;
+import dev.frogmc.frogloader.impl.FrogLoaderImpl;
+import dev.frogmc.frogloader.impl.mod.ModPropertiesImpl;
+import dev.frogmc.frogloader.impl.util.SystemProperties;
+import dev.frogmc.thyroxine.Thyroxine;
+import org.jetbrains.annotations.NotNull;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class MinecraftGamePlugin implements GamePlugin {
+
+	protected final String[] MINECRAFT_CLASSES = new String[]{
+			"net/minecraft/client/main/Main.class",
+			"net/minecraft/client/MinecraftApplet.class",
+			"net/minecraft/server/Main.class"
+	};
+	private static final Logger LOGGER = LoggerFactory.getLogger("Plugin/Minecraft");
+	protected Path gamePath;
+	protected String foundMainClass;
+	private String version;
+
+	protected boolean checkLocation(Path jar) {
+		if (!Files.exists(jar) || Files.isDirectory(jar)) {
+			return false;
+		}
+		try (FileSystem fs = FileSystems.newFileSystem(jar)) {
+			for (String n : MINECRAFT_CLASSES) {
+				if (Files.exists(fs.getPath(n)) && n.contains(FrogLoaderImpl.getInstance().getEnv().getIdentifier())) {
+					LOGGER.info("Found game: {}", jar);
+					foundMainClass = n.substring(0, n.length() - 6).replace("/", ".");
+					try {
+						version = FrogLoaderImpl.getInstance().getGson().fromJson(Files.readString(fs.getPath("version.json")), JsonObject.class).get("id").getAsString();
+					} catch (Exception e) {
+						version = FrogLoaderImpl.getInstance().getArgument("version");
+					}
+					return true;
+				}
+			}
+		} catch (IOException e) {
+			throw new RuntimeException(e);
+		}
+		return false;
+	}
+
+
+	protected Path findGame() {
+		LOGGER.info("Locating game..");
+		String jar = System.getProperty(SystemProperties.MINECRAFT_GAME_JAR);
+		if (jar != null) {
+			Path p = Paths.get(jar);
+			if (checkLocation(p)) {
+				return p;
+			}
+		}
+
+		for (String s : System.getProperty("java.class.path", "").split(File.pathSeparator)) {
+			Path p = Paths.get(s);
+			if (checkLocation(p)) {
+				return p;
+			}
+		}
+		LOGGER.warn("Could not locate game!");
+		return null;
+	}
+
+	@Override
+	public boolean isApplicable() {
+		gamePath = findGame();
+		return gamePath != null;
+	}
+
+	@Override
+	public void run() {
+		try {
+			if (foundMainClass != null) {
+				LOGGER.info("Launching main class: {}", foundMainClass);
+				Class<?> mainClass = Class.forName(foundMainClass);
+				MethodHandle main = MethodHandles.publicLookup().findStatic(mainClass, "main", MethodType.methodType(void.class, String[].class));
+				main.invoke((Object) FrogLoaderImpl.getInstance().getArgs());
+			} else {
+				LOGGER.warn("Failed to locate main class!");
+			}
+		} catch (Throwable e) {
+			throw new RuntimeException(e);
+		}
+	}
+
+	@Override
+	public void init(FrogLoader loader) throws Exception {
+		if (gamePath == null) {
+			throw new IllegalStateException("Game not found!");
+		}
+		Path remappedGamePath = loader.getGameDir().resolve(".frogmc/remappedJars").resolve(version).resolve("game-" + version + "-remapped.jar");
+
+		if (!Files.exists(remappedGamePath.getParent())) {
+			try {
+				Files.createDirectories(remappedGamePath.getParent());
+			} catch (IOException e) {
+				LOGGER.error("Failed to create directory", e);
+			}
+		}
+
+		if (!loader.isDevelopment()) {
+			if (!Files.exists(remappedGamePath)) {
+				Thyroxine.run(version, gamePath, remappedGamePath, true, false);
+			}
+		}
+
+		var runtimePath = loader.isDevelopment() ? gamePath : remappedGamePath;
+		FrogLoaderImpl.getInstance().getClassloader().addURL(runtimePath.toUri().toURL());
+	}
+
+	@Override
+	public @NotNull String queryVersion() {
+		return version;
+	}
+
+	public ModProperties getGameMod() {
+		return new ModPropertiesImpl("minecraft", "Minecraft", "/assets/minecraft/textures/block/grass_block_side.png",
+				MinecraftSemVerImpl.get(version), "MC-EULA",
+				Map.of("Mojang AB", Collections.singleton("Author")),
+				new ModDependencies(Collections.emptySet(), Collections.emptySet(), Collections.emptySet(), Collections.emptySet()),
+				ModExtensions.of(Collections.emptyMap()), Collections.emptySet());
+	}
+}

src/main/java/dev/frogmc/frogloader/impl/plugin/game/minecraft/MinecraftSemVerImpl.java

@@ -1,5 +1,8 @@
 package dev.frogmc.frogloader.impl.plugin.game.minecraft;
 
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
 import dev.frogmc.frogloader.api.mod.SemVer;
 import dev.frogmc.frogloader.impl.SemVerParseException;
 import dev.frogmc.frogloader.impl.mod.SemVerImpl;
@@ -7,6 +10,7 @@ import org.jetbrains.annotations.NotNull;
 
 public class MinecraftSemVerImpl implements SemVer {
 
+	private static final Pattern FILL_PATTERN = Pattern.compile("(\\d+)\\.?(\\d+)?\\.?(\\d+)?");
 	private final String version;
 
 	private MinecraftSemVerImpl(String version) {
@@ -15,12 +19,36 @@ public class MinecraftSemVerImpl implements SemVer {
 
 	static SemVer get(String version) {
 		try {
-			return SemVerImpl.parse(version);
+			StringBuilder builder = new StringBuilder(version);
+			fillVersion(builder);
+			return SemVerImpl.parse(builder.toString());
 		} catch (SemVerParseException e) {
 			return new MinecraftSemVerImpl(version);
 		}
 	}
 
+	private static void fillVersion(StringBuilder builder) {
+		Matcher matcher = FILL_PATTERN.matcher(builder);
+		if (!matcher.find()) {
+			return;
+		}
+
+		if (matcher.group(3) != null) {
+			return;
+		}
+
+		if (builder.charAt(builder.length() - 1) != '.') {
+			builder.append(".");
+		}
+
+		if (matcher.group(2) == null) {
+			builder.append("0.0");
+			return;
+		}
+
+		builder.append("0");
+	}
+
 	@Override
 	public int major() {
 		throw new UnsupportedOperationException("Minecraft version " + version + " does not represent a semver-compatible version");

src/main/java/dev/frogmc/frogloader/impl/plugin/mod/FrogModProvider.java

@@ -0,0 +1,143 @@
+package dev.frogmc.frogloader.impl.plugin.mod;
+
+import java.io.IOException;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.nio.file.*;
+import java.nio.file.attribute.BasicFileAttributes;
+import java.util.*;
+import java.util.function.Consumer;
+
+import com.electronwill.nightconfig.core.UnmodifiableConfig;
+import dev.frogmc.frogloader.api.FrogLoader;
+import dev.frogmc.frogloader.api.extensions.PreLaunchExtension;
+import dev.frogmc.frogloader.api.mod.ModProperties;
+import dev.frogmc.frogloader.api.plugin.ModProvider;
+import dev.frogmc.frogloader.impl.mod.BuiltinExtensions;
+import dev.frogmc.frogloader.impl.mod.ModPropertiesReader;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+@SuppressWarnings("unused")
+public class FrogModProvider implements ModProvider {
+
+	public static final String MOD_FILE_EXTENSION = ".frogmod";
+
+	Logger LOGGER = LoggerFactory.getLogger("FrogModProvider");
+
+	@Override
+	public String id() {
+		return "frogloader:frogmod";
+	}
+
+	@Override
+	public boolean isApplicable() {
+		return true;
+	}
+
+	@Override
+	public boolean isFileApplicable(Path path) {
+		if (!path.toString().endsWith(MOD_FILE_EXTENSION)) {
+			return false;
+		}
+		try (FileSystem fs = FileSystems.newFileSystem(path)) {
+			return Files.exists(fs.getPath("frog.mod.toml"));
+		} catch (Exception e) {
+			LOGGER.error("Error while checking file {}", path, e);
+			return false;
+		}
+	}
+
+	@Override
+	public boolean isDirectoryApplicable(Path path) {
+		return path.getFileName().toString().equals(FrogLoader.getInstance().getGameVersion());
+	}
+
+	@Override
+	public Collection<ModProperties> loadMods(Collection<Path> paths, Consumer<URL> classpathAdder) throws Exception {
+		Path jijCache = getJijCacheDir();
+
+		Map<Path, ModProperties> mods = new HashMap<>();
+		Collection<Path> set = new HashSet<>(paths);
+		Collection<ModProperties> loadedMods = new HashSet<>();
+
+		this.getClass().getClassLoader().resources(ModPropertiesReader.PROPERTIES_FILE_NAME).map(ModPropertiesReader::readFile)
+				.map(o -> o.orElse(null)).filter(Objects::nonNull).forEach(loadedMods::add);
+
+		for (Path p : paths) {
+			findJiJMods(p, set, mods, jijCache);
+		}
+
+		set.stream().filter(mods::containsKey).map(path -> {
+			try {
+				return path.toUri().toURL();
+			} catch (MalformedURLException e) {
+				LOGGER.warn("Failed to resolve url for {}", path, e);
+				return null;
+			}
+		}).filter(Objects::nonNull).forEach(classpathAdder);
+
+		loadedMods.addAll(mods.values());
+
+		return loadedMods;
+	}
+
+	private Path getJijCacheDir(){
+		Path dir = FrogLoader.getInstance().getGameDir().resolve(".frogmc").resolve("jijcache");
+
+		Runtime.getRuntime().addShutdownHook(new Thread(() -> {
+			try {
+				if (Files.exists(dir)) {
+					Files.walkFileTree(dir, new SimpleFileVisitor<>() {
+						@Override
+						public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
+							Files.delete(file);
+							return super.visitFile(file, attrs);
+						}
+
+						@Override
+						public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
+							Files.delete(dir);
+							return super.postVisitDirectory(dir, exc);
+						}
+					});
+				}
+			} catch (IOException e) {
+				LOGGER.error("Failed to clear extracted jij mods!", e);
+			}
+		}));
+
+		return dir;
+	}
+
+	protected void findJiJMods(Path mod, Collection<Path> mods, Map<Path, ModProperties> modPaths, Path jijCache) throws IOException {
+		Optional<ModProperties> opt = ModPropertiesReader.read(mod);
+		if (opt.isPresent()) {
+			ModProperties p = opt.get();
+			modPaths.put(mod, p);
+			List<List<UnmodifiableConfig>> entries = p.extensions().getOrDefault(BuiltinExtensions.INCLUDED_JARS, Collections.emptyList());
+			if (entries.isEmpty()) {
+				return;
+			}
+			try (FileSystem fs = FileSystems.newFileSystem(mod)) {
+				for (List<UnmodifiableConfig> jars : entries) {
+					for (UnmodifiableConfig jar : jars) {
+						Path path = fs.getPath(jar.get("path")).toAbsolutePath();
+						Path extracted = jijCache.resolve((String) jar.get("id"));
+						if (!Files.exists(extracted)){
+							Files.createDirectories(jijCache);
+							Files.copy(path, extracted);
+						}
+						mods.add(extracted);
+						findJiJMods(extracted, mods, modPaths, jijCache);
+					}
+				}
+			}
+		}
+	}
+
+	@Override
+	public void preLaunch(Collection<ModProperties> mods) {
+		mods.forEach(mod -> mod.extensions().runIfPresent(PreLaunchExtension.ID, PreLaunchExtension.class, PreLaunchExtension::onPreLaunch));
+	}
+}

src/main/java/dev/frogmc/frogloader/impl/plugin/mod/JavaModProvider.java

@@ -0,0 +1,28 @@
+package dev.frogmc.frogloader.impl.plugin.mod;
+
+import java.net.URL;
+import java.nio.file.Path;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.function.Consumer;
+
+import dev.frogmc.frogloader.api.mod.ModProperties;
+import dev.frogmc.frogloader.api.plugin.ModProvider;
+import dev.frogmc.frogloader.impl.mod.JavaModProperties;
+
+public class JavaModProvider implements ModProvider {
+	@Override
+	public String id() {
+		return "frogloader:integrated/java";
+	}
+
+	@Override
+	public boolean isApplicable() {
+		return true;
+	}
+
+	@Override
+	public Collection<ModProperties> loadMods(Collection<Path> modFiles, Consumer<URL> classpathAdder) throws Exception {
+		return Collections.singleton(JavaModProperties.get());
+	}
+}

src/main/resources/META-INF/services/dev.frogmc.frogloader.api.plugin.FrogPlugin

@@ -1 +0,0 @@
-dev.frogmc.frogloader.impl.plugin.game.minecraft.Minecraft

src/main/resources/META-INF/services/dev.frogmc.frogloader.api.plugin.GamePlugin

@@ -0,0 +1 @@
+dev.frogmc.frogloader.impl.plugin.game.minecraft.MinecraftGamePlugin

src/main/resources/META-INF/services/dev.frogmc.frogloader.api.plugin.ModProvider

@@ -0,0 +1,2 @@
+dev.frogmc.frogloader.impl.plugin.mod.JavaModProvider
+dev.frogmc.frogloader.impl.plugin.mod.FrogModProvider

src/main/resources/frog.mod.toml

@@ -9,4 +9,5 @@ license = "Apache-2.0"
 credits = [
     { name = "FrogMC Team", roles = ["author"] }
 ]
+icon = "icon.png"