Head Lab

Calls something that is on Kiln's roadmap. Parts of it may already run.

Evidence

Ran on Kiln's test stand (2026-11-04): HeadLab did not start: java.lang.NoClassDefFoundError: net/fabricmc/fabric/api/command/v2/CommandRegistrationCallback; HeadLabClient did not start: java.lang.NoClassDefFoundError: net/fabricmc/fabric/api/client/command/v2/ClientCommandRegistrationCallback.

What it needs from Kiln

com.mojang.authlib.GameProfile
com.mojang.authlib.properties.Property
com.mojang.authlib.properties.PropertyMap
com.mojang.blaze3d.platform.NativeImage
net.fabricmc.fabric.api.client.command.v2.ClientCommandRegistrationCallback
net.fabricmc.fabric.api.client.command.v2.ClientCommands
net.fabricmc.fabric.api.command.v2.CommandRegistrationCallback
net.minecraft.client.User
net.minecraft.client.gui.components.AbstractWidget
net.minecraft.client.gui.components.Button
net.minecraft.client.gui.components.Button.Builder
net.minecraft.client.gui.components.Button.OnPress
net.minecraft.client.gui.components.EditBox
net.minecraft.client.gui.components.EditBox.TextFormatter
net.minecraft.client.input.KeyEvent
net.minecraft.client.input.MouseButtonEvent
net.minecraft.client.multiplayer.PlayerInfo
net.minecraft.commands.CommandSourceStack
net.minecraft.commands.Commands
net.minecraft.commands.Commands.CommandSelection
net.minecraft.core.component.DataComponents
net.minecraft.nbt.CompoundTag
net.minecraft.nbt.ListTag
net.minecraft.nbt.NbtOps
net.minecraft.network.protocol.game.ServerboundSetCreativeModeSlotPacket
net.minecraft.util.Prediction
net.minecraft.world.entity.player.Abilities
net.minecraft.world.entity.player.Inventory
net.minecraft.world.item.component.ResolvableProfile
Minecraft.execute()
Minecraft.getUser()
GuiGraphicsExtractor.centeredText()
Screen.extractRenderState()
Screen.keyPressed()
Screen.mouseClicked()
Screen.mouseDragged()
Screen.mouseReleased()
ClientPacketListener.getOnlinePlayers()
ClientPacketListener.send()
ClientPacketListener.sendCommand()
and 9 more

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

In the author's words

Built in minecraft head editor

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file headlab-1.0.0+26.3.jar. The scan reads the mod's classes; it does not run them.

Reports from players

No reports from players yet.

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