Packed Up (Backpacks)

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

Evidence

Ran on Kiln's test stand (2026-11-04): PackedUp did not start: java.lang.NoClassDefFoundError: net/minecraft/world/inventory/MenuType; PackedUpClient did not start: java.lang.NoClassDefFoundError: net/minecraft/world/inventory/AbstractContainerMenu.

What it needs from Kiln

an access widener
Mixin
com.mojang.blaze3d.vertex.PoseStack
net.fabricmc.fabric.api.event.lifecycle.v1.ServerLevelEvents
net.fabricmc.fabric.api.event.lifecycle.v1.ServerLevelEvents.Load
net.fabricmc.fabric.api.tag.convention.v2.ConventionalItemTags
net.minecraft.SharedConstants
net.minecraft.WorldVersion
net.minecraft.client.Options
net.minecraft.client.input.KeyEvent
net.minecraft.client.input.MouseButtonInfo
net.minecraft.client.renderer.Rect2i
net.minecraft.client.renderer.item.ItemModel
net.minecraft.client.renderer.item.ItemModel.BakingContext
net.minecraft.client.renderer.item.ItemModel.Unbaked
net.minecraft.client.renderer.item.ItemModelResolver
net.minecraft.client.renderer.item.ItemStackRenderState
net.minecraft.client.renderer.item.ItemStackRenderState.LayerRenderState
net.minecraft.client.renderer.item.TrackingItemStackRenderState
net.minecraft.client.renderer.special.SpecialModelRenderer
net.minecraft.client.resources.model.ResolvableModel
net.minecraft.client.resources.model.ResolvableModel.Resolver
net.minecraft.core.NonNullList
net.minecraft.core.component.DataComponentType
net.minecraft.core.component.DataComponentType.Builder
net.minecraft.core.component.DataComponents
net.minecraft.nbt.CompoundTag
net.minecraft.nbt.NbtIo
net.minecraft.nbt.NbtOps
net.minecraft.nbt.Tag
net.minecraft.network.FriendlyByteBuf
net.minecraft.network.RegistryFriendlyByteBuf
net.minecraft.network.chat.ComponentSerialization
net.minecraft.network.codec.ByteBufCodecs
net.minecraft.network.codec.StreamCodec
net.minecraft.server.MinecraftServer
net.minecraft.tags.TagKey
net.minecraft.util.ExtraCodecs
net.minecraft.util.Prediction
net.minecraft.util.datafix.DataFixers
net.minecraft.util.datafix.fixes.References
net.minecraft.world.Container
and 43 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

Packed Up allows you to pack up all your things into new amazing Backpacks!

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file packedup-1.1.2-fabric-mc26.3.jar. The scan reads the mod's classes; it does not run them.

Reports from players

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