Dual-dye shulkers

Evidence

Ran on Kiln's test stand (2026-11-04): MultiColorShulkers did not start: java.lang.NoClassDefFoundError: net/minecraft/network/protocol/common/custom/CustomPacketPayload; MultiColorShulkersClient did not start: java.lang.NoClassDefFoundError: net/minecraft/network/protocol/common/custom/CustomPacketPayload.

What it needs from Kiln

• an access widener
• Mixin
• com.mojang.blaze3d.platform.InputConstants.Key
• com.mojang.blaze3d.platform.Window
• net.fabricmc.fabric.api.attachment.v1.AttachmentRegistry
• net.fabricmc.fabric.api.client.item.v1.ItemTooltipCallback
• 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.ServerBlockEntityEvents
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerBlockEntityEvents.Load
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerBlockEntityEvents.Unload
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents.EndTick
• net.fabricmc.fabric.api.event.player.UseBlockCallback
• net.fabricmc.fabric.api.networking.v1.PayloadTypeRegistry
• net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents
• net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents.Join
• 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.MouseHandler
• net.minecraft.core.cauldron.CauldronInteraction
• net.minecraft.core.cauldron.CauldronInteraction.Dispatcher
• net.minecraft.core.cauldron.CauldronInteractions
• net.minecraft.core.component.DataComponents
• net.minecraft.nbt.CompoundTag
• net.minecraft.network.codec.ByteBufCodecs
• net.minecraft.network.codec.StreamCodec
• 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.stats.Stats
• net.minecraft.world.entity.player.Abilities
• net.minecraft.world.item.DyeColor
• net.minecraft.world.item.DyeItem
• net.minecraft.world.item.Item.TooltipContext
• net.minecraft.world.item.component.SwingAnimation
• net.minecraft.world.item.component.TypedEntityData
• net.minecraft.world.item.crafting.CraftingInput
• and 29 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

Apply different colors to the top and bottom of shulker boxes

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file dual-dye-shulkers-1.3.1+26.3.jar. The scan reads the mod's classes; it does not run them.