Game Rules

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

Evidence

Ran on Kiln's test stand (2026-11-04): TroveFabricEntrypoint did not start: java.lang.NoSuchMethodError: 'net.fabricmc.api.EnvType net.fabricmc.loader.api.FabricLoader.getEnvironmentType()'; GameRulesMod did not start: java.lang.NoClassDefFoundError: net/minecraft/network/protocol/common/custom/CustomPacketPayload; GameRulesClientMod did not start: java.lang.NoClassDefFoundError: net/minecraft/network/protocol/common/custom/CustomPacke.

What it needs from Kiln

Mixin
com.mojang.blaze3d.platform.InputConstants.Key
com.mojang.blaze3d.platform.Window
com.mojang.blaze3d.vertex.VertexConsumer
io.netty.buffer.ByteBuf
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.event.lifecycle.v1.ServerLifecycleEvents
net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents.ServerStarted
net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents.ServerStopped
net.fabricmc.fabric.api.networking.v1.PayloadTypeRegistry
net.fabricmc.fabric.api.networking.v1.ServerPlayNetworking
net.fabricmc.fabric.api.networking.v1.ServerPlayNetworking.Context
net.fabricmc.fabric.api.networking.v1.ServerPlayNetworking.PlayPayloadHandler
net.fabricmc.fabric.api.resource.v1.ResourceLoader
net.fabricmc.fabric.api.resource.v1.pack.PackActivationType
net.fabricmc.loader.api.ModContainer
net.minecraft.client.InputType
net.minecraft.client.gui.ComponentPath
net.minecraft.client.gui.components.AbstractContainerWidget
net.minecraft.client.gui.components.AbstractScrollArea
net.minecraft.client.gui.components.AbstractScrollArea.ScrollbarSettings
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.CycleButton
net.minecraft.client.gui.components.CycleButton.Builder
net.minecraft.client.gui.components.CycleButton.OnValueChange
net.minecraft.client.gui.components.EditBox
net.minecraft.client.gui.components.Renderable
net.minecraft.client.gui.components.Tooltip
net.minecraft.client.gui.components.events.ContainerEventHandler
net.minecraft.client.gui.components.events.GuiEventListener
net.minecraft.client.gui.layouts.Layout
net.minecraft.client.gui.layouts.LayoutElement
net.minecraft.client.gui.narration.NarratableEntry
net.minecraft.client.gui.narration.NarratableEntry.NarrationPriority
net.minecraft.client.gui.narration.NarratedElementType
and 65 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

Modify game rules in your existing worlds.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file gamerulesmod-fabric-2.0.1+26.3.jar. The scan reads the mod's classes; it does not run them.

Reports from players

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