lots of code

src/main/java/io/github/skippyall/minions/mixins/ConnectionMixin.java

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+package io.github.skippyall.minions.mixins;
+
+import io.github.skippyall.minions.fakeplayer.ClientConnectionInterface;
+import io.netty.channel.Channel;
+import net.minecraft.network.ClientConnection;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.gen.Accessor;
+
+@Mixin(ClientConnection.class)
+public abstract class ConnectionMixin implements ClientConnectionInterface {
+    @Override
+    @Accessor //Compat with adventure-platform-fabric
+    public abstract void setChannel(Channel channel);
+}

src/main/java/io/github/skippyall/minions/mixins/PlayerListMixin.java

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+package io.github.skippyall.minions.mixins;
+
+import com.llamalad7.mixinextras.injector.wrapoperation.Operation;
+import com.llamalad7.mixinextras.injector.wrapoperation.WrapOperation;
+import com.mojang.authlib.GameProfile;
+import io.github.skippyall.minions.fakeplayer.MinionFakePlayer;
+import io.github.skippyall.minions.fakeplayer.NetHandlerPlayServerFake;
+import net.minecraft.nbt.NbtCompound;
+import net.minecraft.network.ClientConnection;
+import net.minecraft.network.packet.c2s.common.SyncedClientOptions;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.PlayerManager;
+import net.minecraft.server.network.ConnectedClientData;
+import net.minecraft.server.network.ServerPlayNetworkHandler;
+import net.minecraft.server.network.ServerPlayerEntity;
+import net.minecraft.server.world.ServerWorld;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+@Mixin(PlayerManager.class)
+public class PlayerListMixin {
+
+    @Inject(method = "loadPlayerData", at = @At(value = "RETURN", shift = At.Shift.BEFORE))
+    private void fixStartingPos(ServerPlayerEntity serverPlayerEntity_1, CallbackInfoReturnable<NbtCompound> cir)
+    {
+        if (serverPlayerEntity_1 instanceof MinionFakePlayer)
+        {
+            ((MinionFakePlayer) serverPlayerEntity_1).fixStartingPosition.run();
+        }
+    }
+
+    @WrapOperation(method = "onPlayerConnect", at = @At(value = "NEW", target = "(Lnet/minecraft/server/MinecraftServer;Lnet/minecraft/network/ClientConnection;Lnet/minecraft/server/network/ServerPlayerEntity;Lnet/minecraft/server/network/ConnectedClientData;)Lnet/minecraft/server/network/ServerPlayNetworkHandler;"))
+    private ServerPlayNetworkHandler replaceNetworkHandler(MinecraftServer server, ClientConnection connection, ServerPlayerEntity serverPlayer, ConnectedClientData commonListenerCookie, Operation<ServerPlayNetworkHandler> original)
+    {
+        if (serverPlayer instanceof MinionFakePlayer fake) {
+            return new NetHandlerPlayServerFake(server, connection, fake, commonListenerCookie);
+        } else {
+            return original.call(server, connection, serverPlayer, commonListenerCookie);
+        }
+    }
+
+    @WrapOperation(method = "respawnPlayer", at = @At(value = "NEW", target = "(Lnet/minecraft/server/MinecraftServer;Lnet/minecraft/server/world/ServerWorld;Lcom/mojang/authlib/GameProfile;Lnet/minecraft/network/packet/c2s/common/SyncedClientOptions;)Lnet/minecraft/server/network/ServerPlayerEntity;"))
+    public ServerPlayerEntity makePlayerForRespawn(MinecraftServer minecraftServer, ServerWorld serverLevel, GameProfile gameProfile, SyncedClientOptions clientInformation, Operation<ServerPlayerEntity> original, ServerPlayerEntity serverPlayer, boolean bl) {
+        if (serverPlayer instanceof MinionFakePlayer minion) {
+            return MinionFakePlayer.respawnFake(minecraftServer, serverLevel, gameProfile, clientInformation, minion.isProgrammable());
+        }
+        return original.call(minecraftServer, serverLevel, gameProfile, clientInformation);
+    }
+}

src/main/java/io/github/skippyall/minions/mixins/ServerPlayerMixin.java

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+package io.github.skippyall.minions.mixins;
+
+import com.mojang.authlib.GameProfile;
+import io.github.skippyall.minions.fakeplayer.EntityPlayerActionPack;
+import io.github.skippyall.minions.fakeplayer.ServerPlayerInterface;
+import net.minecraft.network.packet.c2s.common.SyncedClientOptions;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.network.ServerPlayerEntity;
+import net.minecraft.server.world.ServerWorld;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Unique;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+@Mixin(ServerPlayerEntity.class)
+public abstract class ServerPlayerMixin implements ServerPlayerInterface {
+    @Unique
+    public EntityPlayerActionPack actionPack;
+    @Override
+    public EntityPlayerActionPack getActionPack()
+    {
+        return actionPack;
+    }
+
+    @Inject(method = "<init>", at = @At(value = "RETURN"))
+    private void onServerPlayerEntityConstructor(MinecraftServer minecraftServer, ServerWorld serverLevel, GameProfile gameProfile, SyncedClientOptions clientInformation, CallbackInfo ci)
+    {
+        this.actionPack = new EntityPlayerActionPack((ServerPlayerEntity) (Object) this);
+    }
+
+    @Inject(method = "tick", at = @At(value = "HEAD"))
+    private void onTick(CallbackInfo ci)
+    {
+        actionPack.onUpdate();
+    }
+}