DebugUtils

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

Evidence

Ran on Kiln's test stand (2026-11-04): DebugUtilsFabric did not start: java.lang.NoClassDefFoundError: net/fabricmc/fabric/api/networking/v1/PayloadTypeRegistry.

What it needs from Kiln

Mixin
com.mojang.authlib.GameProfile
net.fabricmc.api.EnvType
net.fabricmc.fabric.api.client.networking.v1.ClientPlayNetworking
net.fabricmc.fabric.api.client.networking.v1.ClientPlayNetworking.Context
net.fabricmc.fabric.api.client.networking.v1.ClientPlayNetworking.PlayPayloadHandler
net.fabricmc.fabric.api.command.v2.CommandRegistrationCallback
net.fabricmc.fabric.api.networking.v1.PayloadTypeRegistry
net.minecraft.SharedConstants
net.minecraft.client.renderer.debug.BeeDebugRenderer
net.minecraft.client.renderer.debug.BrainDebugRenderer
net.minecraft.client.renderer.debug.BreezeDebugRenderer
net.minecraft.client.renderer.debug.DebugRenderer
net.minecraft.client.renderer.debug.DebugRenderer.SimpleDebugRenderer
net.minecraft.client.renderer.debug.EntityBlockIntersectionDebugRenderer
net.minecraft.client.renderer.debug.GameEventListenerRenderer
net.minecraft.client.renderer.debug.GoalSelectorDebugRenderer
net.minecraft.client.renderer.debug.NeighborsUpdateRenderer
net.minecraft.client.renderer.debug.PathfindingRenderer
net.minecraft.client.renderer.debug.PoiDebugRenderer
net.minecraft.client.renderer.debug.RaidDebugRenderer
net.minecraft.client.renderer.debug.RedstoneWireOrientationsRenderer
net.minecraft.client.renderer.debug.StructureRenderer
net.minecraft.client.renderer.debug.VillageSectionsDebugRenderer
net.minecraft.client.renderer.extract.LevelExtractor
net.minecraft.commands.CommandSourceStack
net.minecraft.commands.Commands
net.minecraft.commands.Commands.CommandSelection
net.minecraft.commands.arguments.EntityArgument
net.minecraft.commands.arguments.ResourceArgument
net.minecraft.network.RegistryFriendlyByteBuf
net.minecraft.network.codec.ByteBufCodecs
net.minecraft.network.codec.StreamCodec
net.minecraft.network.codec.StreamCodec.CodecOperation
net.minecraft.network.protocol.common.custom.CustomPacketPayload
net.minecraft.network.protocol.common.custom.CustomPacketPayload.Type
net.minecraft.network.protocol.common.custom.CustomPacketPayload.TypeAndCodec
net.minecraft.server.permissions.PermissionSet
net.minecraft.server.permissions.Permissions
net.minecraft.util.Util
net.minecraft.util.debug.DebugSubscription
and 8 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

Enables various debugging features of minecraft

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file debugutils-26.2-1.0.9-fabric.jar. The scan reads the mod's classes; it does not run them.

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