IG: Potion Stacker Addon

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

Evidence

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

What it needs from Kiln

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.networking.v1.PacketSender
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.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.world.inventory.AbstractContainerMenu
net.minecraft.world.inventory.InventoryMenu
net.minecraft.world.item.PotionItem
net.minecraft.world.level.gamerules.GameRules
net.minecraft.world.level.storage.ServerLevelData
net.minecraft.world.level.storage.WorldData
FabricLoader.isModLoaded()
Minecraft.execute()
ServerPlayer.containerMenu
ServerPlayer.inventoryMenu
Items.BEETROOT_SOUP
Items.MUSHROOM_STEW
Items.RABBIT_STEW
Items.SUSPICIOUS_STEW

On the roadmap: Minecraft's libraries and client API (0.2), Code next to data (0.3), Machines (0.4)

In the author's words

Tired of potions and stews cluttering your inventory slots and taking up valuable backpack space? Potion Stacker Addon is a dedicated addon for Stack Size Adjuster that allows regular potions, splash

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file potion-stacker-addon-1.1.4+26.3.jar. The scan reads the mod's classes; it does not run them.

Reports from players

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