Nemo's Backpacks

Evidence

Ran on Kiln's test stand (2026-11-04): NemosBackpacks did not start: java.lang.NoClassDefFoundError: net/minecraft/core/component/DataComponentType$Builder; NemosBackpacksClient did not start: java.lang.NoClassDefFoundError: net/minecraft/client/renderer/entity/RenderLayerParent.

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.client.rendering.v1.LivingEntityRenderLayerRegistrationCallback
• net.fabricmc.fabric.api.client.rendering.v1.LivingEntityRenderLayerRegistrationCallback.RegistrationHelper
• net.fabricmc.fabric.api.client.rendering.v1.ModelLayerRegistry
• net.fabricmc.fabric.api.client.rendering.v1.ModelLayerRegistry.TexturedLayerDefinitionProvider
• 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.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.geom.ModelLayerLocation
• net.minecraft.client.model.geom.ModelPart
• net.minecraft.client.model.geom.ModelPart.Cube
• net.minecraft.client.model.geom.ModelPart.Polygon
• net.minecraft.client.model.geom.ModelPart.Vertex
• net.minecraft.client.model.geom.PartPose
• 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.entity.EntityRendererProvider
• net.minecraft.client.renderer.entity.EntityRendererProvider.Context
• net.minecraft.client.renderer.entity.layers.RenderLayer
• net.minecraft.client.renderer.entity.player.AvatarRenderer
• net.minecraft.client.renderer.entity.state.AvatarRenderState
• net.minecraft.client.renderer.rendertype.RenderTypes
• net.minecraft.client.renderer.texture.OverlayTexture
• net.minecraft.core.NonNullList
• net.minecraft.core.component.DataComponentMap
• net.minecraft.core.component.DataComponentType
• net.minecraft.core.component.DataComponentType.Builder
• net.minecraft.core.component.DataComponents
• net.minecraft.network.codec.ByteBufCodecs
• and 48 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

Add colorful backpacks to Minecraft!

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file nemos-backpacks-26.3-2.1.jar. The scan reads the mod's classes; it does not run them.