First commit

src/main/generated/assets/codecraft/lang/en_us.json

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+{
+  "key.category.codecraft.codecraft": "Codecraft",
+  "key.codecraft.open_editor": "Open Editor"
+}

src/main/java/com/aranroig/Codecraft.java

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+package com.aranroig;
+
+import com.aranroig.payloads.ServerboundSaveCodePayload;
+import net.fabricmc.api.ModInitializer;
+
+import net.fabricmc.fabric.api.networking.v1.PayloadTypeRegistry;
+import net.fabricmc.fabric.api.networking.v1.ServerPlayNetworking;
+import net.minecraft.resources.Identifier;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class Codecraft implements ModInitializer {
+	public static final String MOD_ID = "codecraft";
+
+	// This logger is used to write text to the console and the log file.
+	// It is considered best practice to use your mod id as the logger's name.
+	// That way, it's clear which mod wrote info, warnings, and errors.
+	public static final Logger LOGGER = LoggerFactory.getLogger(MOD_ID);
+
+	@Override
+	public void onInitialize() {
+		// This code runs as soon as Minecraft is in a mod-load-ready state.
+		// However, some things (like resources) may still be uninitialized.
+		// Proceed with mild caution.
+		LOGGER.info("Hello Fabric world!");
+
+		PayloadTypeRegistry.serverboundPlay().register(ServerboundSaveCodePayload.TYPE, ServerboundSaveCodePayload.CODEC);
+
+		ServerPlayNetworking.registerGlobalReceiver(ServerboundSaveCodePayload.TYPE, (payload, context) -> {
+			System.out.println(payload.data().getName());
+			System.out.println(payload.data().getText());
+		});
+	}
+
+	public static Identifier id(String path) {
+		return Identifier.fromNamespaceAndPath(MOD_ID, path);
+	}
+}

src/main/java/com/aranroig/editor/EditorFile.java

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+package com.aranroig.editor;
+
+import net.minecraft.network.RegistryFriendlyByteBuf;
+import net.minecraft.network.codec.ByteBufCodecs;
+import net.minecraft.network.codec.StreamCodec;
+
+public class EditorFile {
+    public static final StreamCodec<RegistryFriendlyByteBuf, EditorFile> CODEC =
+            StreamCodec.composite(
+                    ByteBufCodecs.STRING_UTF8,
+                    EditorFile::getName,
+
+                    ByteBufCodecs.STRING_UTF8,
+                    EditorFile::getText,
+
+                    EditorFile::new
+            );
+
+    // Class with file info
+    private String name;
+    private String text;
+
+    public EditorFile(String name, String text) {
+        this.name = name;
+        this.text = text;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getText() {
+        return text;
+    }
+
+    public void setText(String text) {
+        this.text = text;
+    }
+
+}

src/main/java/com/aranroig/mixin/ExampleMixin.java

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+package com.aranroig.mixin;
+
+import net.minecraft.server.MinecraftServer;
+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(MinecraftServer.class)
+public class ExampleMixin {
+	@Inject(at = @At("HEAD"), method = "loadLevel")
+	private void init(CallbackInfo info) {
+		// This code is injected into the start of MinecraftServer.loadLevel()V
+	}
+}

src/main/java/com/aranroig/payloads/ClientboundSaveCodePayload.java

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+package com.aranroig.payloads;
+
+import com.aranroig.Codecraft;
+import com.aranroig.editor.EditorFile;
+import net.minecraft.network.RegistryFriendlyByteBuf;
+import net.minecraft.network.codec.StreamCodec;
+import net.minecraft.network.protocol.common.custom.CustomPacketPayload;
+import net.minecraft.resources.Identifier;
+
+public record ClientboundSaveCodePayload(EditorFile data) implements CustomPacketPayload {
+
+    public static final Identifier SAVE_CODE_PAYLOAD_ID = Identifier.fromNamespaceAndPath(Codecraft.MOD_ID, "save_code");
+
+    public static final CustomPacketPayload.Type<ClientboundSaveCodePayload> TYPE = new CustomPacketPayload.Type<>(SAVE_CODE_PAYLOAD_ID);
+
+    public static final StreamCodec<RegistryFriendlyByteBuf, ClientboundSaveCodePayload> CODEC =
+            StreamCodec.composite(EditorFile.CODEC, ClientboundSaveCodePayload::data, ClientboundSaveCodePayload::new);
+
+    @Override
+    public Type<? extends CustomPacketPayload> type() {
+        return TYPE;
+    }
+}

src/main/java/com/aranroig/payloads/ServerboundSaveCodePayload.java

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+package com.aranroig.payloads;
+
+import com.aranroig.Codecraft;
+import com.aranroig.editor.EditorFile;
+import net.minecraft.network.RegistryFriendlyByteBuf;
+import net.minecraft.network.codec.StreamCodec;
+import net.minecraft.network.protocol.common.custom.CustomPacketPayload;
+import net.minecraft.resources.Identifier;
+
+public record ServerboundSaveCodePayload(EditorFile data) implements CustomPacketPayload {
+    public static final Identifier SAVE_CODE_PAYLOAD_ID = Identifier.fromNamespaceAndPath(Codecraft.MOD_ID, "save_code");
+
+    public static final CustomPacketPayload.Type<ServerboundSaveCodePayload> TYPE = new CustomPacketPayload.Type<>(SAVE_CODE_PAYLOAD_ID);
+
+    public static final StreamCodec<RegistryFriendlyByteBuf, ServerboundSaveCodePayload> CODEC =
+            StreamCodec.composite(EditorFile.CODEC, ServerboundSaveCodePayload::data, ServerboundSaveCodePayload::new);
+
+    @Override
+    public CustomPacketPayload.Type<? extends CustomPacketPayload> type() {
+        return TYPE;
+    }
+}

src/main/resources/codecraft.mixins.json

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+{
+	"required": true,
+	"package": "com.aranroig.mixin",
+	"compatibilityLevel": "JAVA_25",
+	"mixins": [
+		"ExampleMixin"
+	],
+	"injectors": {
+		"defaultRequire": 1
+	},
+	"overwrites": {
+		"requireAnnotations": true
+	}
+}

src/main/resources/fabric.mod.json

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+{
+	"schemaVersion": 1,
+	"id": "codecraft",
+	"version": "${version}",
+	"name": "codecraft",
+	"description": "Codecraft Mod",
+	"authors": [
+		"Aran Roig"
+	],
+	"contact": {
+		"homepage": "https://aranroig.com/",
+		"sources": "https://github.com/FabricMC/fabric-example-mod"
+	},
+	"license": "CC0-1.0",
+	"icon": "assets/codecraft/icon.png",
+	"environment": "*",
+	"entrypoints": {
+		"main": [
+			"com.aranroig.Codecraft"
+		],
+		"client": [
+			"com.aranroig.client.CodecraftClient"
+		],
+		"fabric-datagen": [
+			"com.aranroig.client.CodecraftDataGenerator"
+		]
+	},
+	"mixins": [
+		"codecraft.mixins.json",
+		{
+			"config": "codecraft.client.mixins.json",
+			"environment": "client"
+		}
+	],
+	"depends": {
+		"fabricloader": ">=0.19.3",
+		"minecraft": "~26.2",
+		"java": ">=25",
+		"fabric-api": "*"
+	}
+}