BlockBoy Arcade

Evidence

Ran on Kiln's test stand (2026-11-04): BlockBoyArcade did not start: java.lang.NoClassDefFoundError: net/fabricmc/fabric/api/resource/SimpleSynchronousResourceReloadListener.

What it needs from Kiln

• an access widener
• Mixin
• net.fabricmc.fabric.api.command.v2.CommandRegistrationCallback
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents.StartTick
• net.minecraft.commands.CommandSourceStack
• net.minecraft.commands.Commands
• net.minecraft.commands.Commands.CommandSelection
• net.minecraft.core.component.DataComponentType
• net.minecraft.core.component.DataComponentType.Builder
• net.minecraft.core.component.DataComponents
• net.minecraft.server.MinecraftServer
• net.minecraft.server.packs.resources.Resource
• net.minecraft.server.packs.resources.ResourceManager
• net.minecraft.server.packs.resources.ResourceManager.Selector
• net.minecraft.server.permissions.Permission
• net.minecraft.server.permissions.Permission.HasCommandLevel
• net.minecraft.server.permissions.PermissionLevel
• net.minecraft.server.permissions.PermissionSet
• net.minecraft.server.players.PlayerList
• net.minecraft.util.Brightness
• net.minecraft.util.Mth
• net.minecraft.util.Prediction
• net.minecraft.world.SimpleContainer
• net.minecraft.world.entity.EntitySpawnReason
• net.minecraft.world.entity.EntityType
• net.minecraft.world.entity.player.Input
• net.minecraft.world.entity.player.Inventory
• net.minecraft.world.inventory.AbstractContainerMenu
• net.minecraft.world.inventory.MenuType
• net.minecraft.world.inventory.Slot
• net.minecraft.world.item.Item.TooltipContext
• net.minecraft.world.item.component.CustomModelData
• net.minecraft.world.item.component.TooltipProvider
• net.minecraft.world.level.block.ColorCollection
• net.minecraft.world.level.storage.ValueInput
• net.minecraft.world.level.storage.ValueOutput
• org.apache.commons.io.FilenameUtils
• org.apache.commons.io.IOUtils
• org.apache.logging.log4j.LogManager
• org.apache.logging.log4j.Logger
• net.fabricmc.fabric.api.resource.SimpleSynchronousResourceReloadListener
• and 26 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

Serverside GameBoy emulator as Arcade machines with data driven cartridge items!

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file BlockBoyArcade-1.1.0+26.3.jar. The scan reads the mod's classes; it does not run them.