Hotbar Pockets

Evidence

Ran on Kiln's test stand (2026-11-04): HotbarPockets did not start: java.lang.NoClassDefFoundError: net/fabricmc/fabric/api/attachment/v1/AttachmentType; HotbarPocketsClient did not start: java.lang.NoClassDefFoundError: net/minecraft/world/inventory/AbstractContainerMenu.

What it needs from Kiln

• net.fabricmc.fabric.api.attachment.v1.AttachmentRegistry
• net.fabricmc.fabric.api.attachment.v1.AttachmentRegistry.Builder
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayConnectionEvents
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayConnectionEvents.Join
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayNetworking
• net.fabricmc.fabric.api.client.screen.v1.ScreenEvents
• net.fabricmc.fabric.api.client.screen.v1.ScreenEvents.AfterInit
• net.fabricmc.fabric.api.client.screen.v1.ScreenEvents.BeforeExtract
• net.fabricmc.fabric.api.client.screen.v1.ScreenKeyboardEvents
• net.fabricmc.fabric.api.client.screen.v1.ScreenKeyboardEvents.AfterKeyPress
• 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.Disconnect
• 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.advancements.triggers.CriteriaTriggers
• net.minecraft.advancements.triggers.InventoryChangeTrigger
• net.minecraft.client.gui.screens.inventory.AbstractContainerScreen
• net.minecraft.client.multiplayer.ServerData
• net.minecraft.client.server.IntegratedServer
• net.minecraft.core.NonNullList
• net.minecraft.network.RegistryFriendlyByteBuf
• 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.util.Prediction
• net.minecraft.world.entity.item.ItemEntity
• net.minecraft.world.entity.player.Inventory
• net.minecraft.world.inventory.AbstractContainerMenu
• net.minecraft.world.inventory.InventoryMenu
• net.minecraft.world.inventory.Slot
• net.minecraft.world.item.component.ItemContainerContents
• net.minecraft.world.level.storage.WorldData
• net.fabricmc.fabric.api.attachment.v1.AttachmentType
• and 20 more

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

Adds up to three extra slots behind each hotbar slot, with a key that rotates them into your hand.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file hotbar-pockets-2.1.1+26.3.jar. The scan reads the mod's classes; it does not run them.