Map Maker Utils

Evidence

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

What it needs from Kiln

• Mixin
• com.mojang.blaze3d.Blaze3D
• net.fabricmc.fabric.api.client.command.v2.ClientCommandRegistrationCallback
• net.fabricmc.fabric.api.client.command.v2.FabricClientCommandSource
• net.fabricmc.fabric.api.command.v2.CommandRegistrationCallback
• net.minecraft.SharedConstants
• net.minecraft.WorldVersion
• net.minecraft.client.KeyboardHandler
• 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.CommandSuggestions
• net.minecraft.client.gui.components.EditBox
• net.minecraft.client.gui.screens.ConfirmScreen
• net.minecraft.client.input.MouseButtonEvent
• net.minecraft.client.renderer.Rect2i
• net.minecraft.client.server.IntegratedServer
• net.minecraft.commands.CommandSourceStack
• net.minecraft.commands.Commands
• net.minecraft.commands.Commands.CommandSelection
• net.minecraft.core.RegistrationInfo
• net.minecraft.core.RegistryAccess
• net.minecraft.core.RegistryAccess.Frozen
• net.minecraft.resources.RegistryOps
• net.minecraft.server.MinecraftServer
• net.minecraft.server.dialog.Dialog
• net.minecraft.server.packs.PackType
• net.minecraft.server.packs.metadata.pack.PackFormat
• net.minecraft.util.FormattedCharSequence
• net.minecraft.world.level.storage.LevelResource
• net.minecraft.world.phys.HitResult.Type
• JsonParseException.getMessage()
• Minecraft.disconnectFromWorld()
• Minecraft.execute()
• Minecraft.gameDirectory
• Minecraft.getSingleplayerServer()
• Minecraft.hitResult
• Minecraft.keyboardHandler
• Minecraft.setScreenAndShow()
• Font.split()
• and 20 more

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

In the author's words

Utility commands for Map Makers and Data Pack developers.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file mapmakerutils-26.3-1.3.0.jar. The scan reads the mod's classes; it does not run them.