1.4.113 on 23w31a, many regressions including modded networking, fake players, scoreboard api and more.

src/main/java/carpet/network/CarpetClient.java

@@ -7,11 +7,32 @@ import net.minecraft.client.player.LocalPlayer;
 import net.minecraft.nbt.CompoundTag;
 import net.minecraft.nbt.ListTag;
 import net.minecraft.nbt.Tag;
+import net.minecraft.network.FriendlyByteBuf;
 import net.minecraft.network.chat.Component;
+import net.minecraft.network.protocol.common.custom.CustomPacketPayload;
 import net.minecraft.resources.ResourceLocation;
 
 public class CarpetClient
 {
+    public record CarpetPayload(CompoundTag data) implements CustomPacketPayload
+    {
+        public static final ResourceLocation ID = CARPET_CHANNEL;
+
+        public CarpetPayload(final FriendlyByteBuf input) {
+            this(input.readNbt());
+        }
+
+        @Override
+        public void write(final FriendlyByteBuf output) {
+            output.writeNbt(data);
+        }
+
+        @Override
+        public ResourceLocation id() {
+            return ID;
+        }
+    }
+
     public static final int HI = 69;
     public static final int HELLO = 420;
     public static final int DATA = 1;