AuthCore

Evidence

Server-side mod: Kiln runs mods' code on Horizon's single-player server, not on dedicated servers.

What it needs from Kiln

• Mixin
• com.mojang.authlib.GameProfile
• io.netty.buffer.ByteBuf
• io.netty.buffer.Unpooled
• net.fabricmc.api.DedicatedServerModInitializer
• net.minecraft.commands.CommandSourceStack
• net.minecraft.commands.Commands
• net.minecraft.commands.arguments.EntityArgument
• net.minecraft.commands.arguments.UuidArgument
• net.minecraft.core.BlockPos.MutableBlockPos
• net.minecraft.core.component.DataComponents
• net.minecraft.nbt.CompoundTag
• net.minecraft.nbt.NbtIo
• net.minecraft.network.Connection
• net.minecraft.network.chat.ClickEvent
• net.minecraft.network.chat.Style
• net.minecraft.network.chat.TextColor
• net.minecraft.network.protocol.Packet
• net.minecraft.network.protocol.game.ClientboundContainerClosePacket
• net.minecraft.network.protocol.game.ClientboundPlayerPositionPacket
• net.minecraft.network.protocol.game.ClientboundSetSubtitleTextPacket
• net.minecraft.network.protocol.game.ClientboundSetTitleTextPacket
• net.minecraft.network.protocol.game.ClientboundSetTitlesAnimationPacket
• net.minecraft.network.protocol.game.ServerboundChatCommandPacket
• net.minecraft.network.protocol.game.ServerboundChatCommandSignedPacket
• net.minecraft.network.protocol.game.ServerboundMovePlayerPacket
• net.minecraft.network.protocol.game.ServerboundPlayerActionPacket
• net.minecraft.network.protocol.game.ServerboundPlayerActionPacket.Action
• net.minecraft.network.protocol.handshake.ClientIntentionPacket
• net.minecraft.network.protocol.login.ServerboundHelloPacket
• net.minecraft.network.protocol.login.ServerboundKeyPacket
• net.minecraft.server.MinecraftServer
• net.minecraft.server.level.ServerPlayerGameMode
• net.minecraft.server.network.ServerGamePacketListenerImpl
• net.minecraft.server.network.ServerLoginPacketListenerImpl
• net.minecraft.server.players.PlayerList
• net.minecraft.world.damagesource.DamageSource
• net.minecraft.world.effect.MobEffect
• net.minecraft.world.effect.MobEffectInstance
• net.minecraft.world.effect.MobEffects
• net.minecraft.world.entity.EntityType
• and 80 more

On the roadmap: Minecraft's libraries and client API (0.2), Code next to data (0.3), Machines (0.4), Mixin (0.5)

In the author's words

AuthCore is a high-performance, server-side Minecraft Fabric login and security framework for versions 1.16+. It secures offline and online servers against bots and griefers by comprehensively managing player sessions.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file authcore-26.1-26.3-fabric-1.0.2.jar. The scan reads the mod's classes; it does not run them.