Split client & common sources + POC FPS counter

src/client/java/wtf/hak/survivalfabric/SurvivalFabricClient.java

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+package wtf.hak.survivalfabric;
+
+import net.fabricmc.api.ClientModInitializer;
+import net.fabricmc.fabric.api.client.event.lifecycle.v1.ClientTickEvents;
+import net.fabricmc.fabric.api.client.keybinding.v1.KeyBindingHelper;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.option.KeyBinding;
+import net.minecraft.client.util.InputUtil;
+import net.minecraft.text.Text;
+import org.lwjgl.glfw.GLFW;
+
+import java.awt.*;
+
+public class SurvivalFabricClient implements ClientModInitializer {
+
+	public static boolean SHOULD_SHOW_FPS = false;
+
+	KeyBinding keyBinding = KeyBindingHelper.registerKeyBinding(new KeyBinding(
+			"key.survivalfabric.fps", // The translation key of the keybinding's name
+			InputUtil.Type.KEYSYM, // The type of the keybinding, KEYSYM for keyboard, MOUSE for mouse.
+			GLFW.GLFW_KEY_PERIOD, // The keycode of the key
+			"category.survivalfabric.utils" // The translation key of the keybinding's category.
+	));
+
+	@Override
+	public void onInitializeClient() {
+		ClientTickEvents.END_CLIENT_TICK.register(client -> {
+			while (keyBinding.wasPressed()) {
+				MinecraftClient mc = MinecraftClient.getInstance();
+				SHOULD_SHOW_FPS = !SHOULD_SHOW_FPS;
+				if(SHOULD_SHOW_FPS) {
+					mc.player.sendMessage(Text.literal("FPS Counter is now on").withColor(Color.GREEN.getRGB()), true);
+				} else
+					mc.player.sendMessage(Text.literal("FPS Counter is now off").withColor(Color.RED.getRGB()), true);
+
+			}
+		});
+	}
+}

src/client/java/wtf/hak/survivalfabric/SurvivalFabricDataGenerator.java

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+package wtf.hak.survivalfabric;
+
+import net.fabricmc.fabric.api.datagen.v1.DataGeneratorEntrypoint;
+import net.fabricmc.fabric.api.datagen.v1.FabricDataGenerator;
+
+public class SurvivalFabricDataGenerator implements DataGeneratorEntrypoint {
+	@Override
+	public void onInitializeDataGenerator(FabricDataGenerator fabricDataGenerator) {
+
+	}
+}

src/client/java/wtf/hak/survivalfabric/mixin/client/InGameHudMixin.java

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+package wtf.hak.survivalfabric.mixin.client;
+
+import net.minecraft.client.MinecraftClient;
+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;
+
+import net.minecraft.client.gui.DrawContext;
+import net.minecraft.client.gui.hud.InGameHud;
+import net.minecraft.client.render.RenderTickCounter;
+import wtf.hak.survivalfabric.SurvivalFabricClient;
+
+import java.awt.*;
+
+@Mixin(InGameHud.class)
+public class InGameHudMixin {
+
+	private final int TEXT_COLOR = Color.GRAY.getRGB();
+
+	@Inject(method = "render", at = @At("RETURN"))
+	private void renderFPS(DrawContext context, RenderTickCounter tickCounter, CallbackInfo ci) {
+		if(SurvivalFabricClient.SHOULD_SHOW_FPS) {
+			MinecraftClient client = MinecraftClient.getInstance();
+			context.drawTextWithShadow(client.textRenderer, client.getCurrentFps() + " FPS", 5, 5, TEXT_COLOR);
+		}
+	}
+}

src/client/resources/survivalfabric.client.mixins.json

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+{
+	"required": true,
+	"package": "wtf.hak.survivalfabric.mixin.client",
+	"compatibilityLevel": "JAVA_21",
+	"client": [
+      "InGameHudMixin"
+	],
+	"injectors": {
+		"defaultRequire": 1
+	}
+}