Simplified Backpacks

Evidence

Ran on Kiln's test stand (2026-11-04): SimplifiedBackpacks did not start: java.lang.NoSuchFieldError: Class net.minecraft.core.registries.BuiltInRegistries does not have member field 'net.minecraft.core.Registry DATA_COMPONENT_TYPE'; SimplifiedBackpacksClient did not start: java.lang.NoClassDefFoundError: net/minecraft/network/protocol/common/custom/CustomPacketPayload.

What it needs from Kiln

• Mixin
• com.mojang.blaze3d.vertex.PoseStack
• com.mojang.math.Axis
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayNetworking
• net.fabricmc.fabric.api.client.rendering.v1.ModelLayerRegistry
• net.fabricmc.fabric.api.client.rendering.v1.ModelLayerRegistry.TexturedLayerDefinitionProvider
• net.fabricmc.fabric.api.event.EventFactory
• net.fabricmc.fabric.api.menu.v1.ExtendedMenuProvider
• net.fabricmc.fabric.api.menu.v1.ExtendedMenuType
• net.fabricmc.fabric.api.menu.v1.ExtendedMenuType.ExtendedFactory
• 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.fabricmc.fabric.api.object.builder.v1.block.entity.FabricBlockEntityTypeBuilder
• net.fabricmc.fabric.api.object.builder.v1.block.entity.FabricBlockEntityTypeBuilder.Factory
• net.minecraft.client.gui.components.Button
• net.minecraft.client.gui.components.Button.OnPress
• net.minecraft.client.gui.components.ImageButton
• net.minecraft.client.gui.components.Tooltip
• net.minecraft.client.gui.components.WidgetSprites
• net.minecraft.client.gui.screens.MenuScreens
• net.minecraft.client.gui.screens.MenuScreens.ScreenConstructor
• net.minecraft.client.gui.screens.inventory.AbstractContainerScreen
• net.minecraft.client.model.EntityModel
• net.minecraft.client.model.HumanoidModel
• net.minecraft.client.model.geom.EntityModelSet
• net.minecraft.client.model.geom.ModelLayerLocation
• net.minecraft.client.model.geom.ModelPart
• net.minecraft.client.model.geom.PartPose
• net.minecraft.client.model.geom.builders.CubeDeformation
• net.minecraft.client.model.geom.builders.CubeListBuilder
• net.minecraft.client.model.geom.builders.LayerDefinition
• net.minecraft.client.model.geom.builders.MeshDefinition
• net.minecraft.client.model.geom.builders.PartDefinition
• net.minecraft.client.renderer.RenderPipelines
• net.minecraft.client.renderer.SubmitNodeCollector
• net.minecraft.client.renderer.blockentity.BlockEntityRenderer
• net.minecraft.client.renderer.blockentity.BlockEntityRendererProvider
• net.minecraft.client.renderer.blockentity.BlockEntityRendererProvider.Context
• net.minecraft.client.renderer.blockentity.BlockEntityRenderers
• and 72 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

Simple Backpacks with nifty addons!

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file simplified-backpacks-26.3-r1.jar. The scan reads the mod's classes; it does not run them.