IG: Stack Size Adjuster

Evidence

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

What it needs from Kiln

• Mixin
• 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.level.gamerules.GameRules
• net.minecraft.world.level.storage.ServerLevelData
• net.minecraft.world.level.storage.WorldData
• Minecraft.execute()
• ServerPlayer.containerMenu
• ServerPlayer.inventoryMenu

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

Stack Size Adjustergrants you full authority over item stack limits. Scale weapons, armor, blocks, and consumables dynamically at runtime.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file stack-size-adjuster-1.4.18+26.3.jar. The scan reads the mod's classes; it does not run them.