Villager Checkers

Evidence

Ran on Kiln's test stand (2026-11-04): VillagerCheckers did not start: java.lang.NoClassDefFoundError: net/fabricmc/fabric/api/networking/v1/PayloadTypeRegistry; VillagerCheckersClient did not start: java.lang.NoClassDefFoundError: net/minecraft/network/chat/FormattedText.

What it needs from Kiln

• Mixin
• com.mojang.authlib.GameProfile
• 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.client.screen.v1.ScreenEvents
• net.fabricmc.fabric.api.client.screen.v1.ScreenEvents.AfterInit
• net.fabricmc.fabric.api.client.screen.v1.Screens
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents.ServerStopping
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents.EndTick
• net.fabricmc.fabric.api.networking.v1.PayloadTypeRegistry
• net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents
• net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents.Disconnect
• net.fabricmc.fabric.api.networking.v1.ServerPlayNetworking
• net.fabricmc.fabric.api.networking.v1.ServerPlayNetworking.Context
• net.fabricmc.fabric.api.networking.v1.ServerPlayNetworking.PlayPayloadHandler
• 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.screens.inventory.InventoryScreen
• net.minecraft.client.gui.screens.inventory.MerchantScreen
• net.minecraft.client.input.MouseButtonEvent
• net.minecraft.client.resources.sounds.SimpleSoundInstance
• net.minecraft.client.sounds.SoundEngine
• net.minecraft.client.sounds.SoundEngine.PlayResult
• net.minecraft.client.sounds.SoundManager
• 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.MinecraftServer
• net.minecraft.server.network.ServerGamePacketListenerImpl
• net.minecraft.server.players.PlayerList
• net.minecraft.world.entity.npc.villager.Villager
• net.minecraft.world.entity.npc.villager.VillagerData
• net.minecraft.world.inventory.MerchantMenu
• and 22 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

Play checkers against villagers! A Play Checkers button on the trade screen starts a full game - their skill scales with trading level, from a Novice who walks into every trap to a Master who converts won endings.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file villagercheckers-0.1.2.jar. The scan reads the mod's classes; it does not run them.