Hopper Stats

Evidence

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

What it needs from Kiln

• Mixin
• com.mojang.blaze3d.platform.InputConstants.Key
• 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.player.PlayerBlockBreakEvents
• net.fabricmc.fabric.api.event.player.PlayerBlockBreakEvents.Before
• net.fabricmc.fabric.api.event.player.UseBlockCallback
• 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.minecraft.client.gui.components.AbstractSliderButton
• 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.StringWidget
• net.minecraft.core.UUIDUtil
• 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.players.PlayerList
• net.minecraft.util.Mth
• net.minecraft.world.level.block.HopperBlock
• net.minecraft.world.level.block.entity.BlockEntity
• net.minecraft.world.phys.HitResult.Type
• InputConstants.UNKNOWN
• KeyMapping.isDown()
• Minecraft.execute()
• Minecraft.hitResult
• Minecraft.setScreenAndShow()
• BlockPos.STREAM_CODEC
• Direction.from3DDataValue()
• Direction.get3DDataValue()
• ServerLevel.getBlockEntity()
• ServerPlayer.nameAndId()
• BlockHitResult.getType()

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

A lightweight server-compatible hopper tracking mod.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file hopper_stats-26.3-1.6.1.jar. The scan reads the mod's classes; it does not run them.