Elytra & Capes

Evidence

Ran on Kiln's test stand (2026-11-04): ElytraAndCapesClient did not start: java.lang.NoClassDefFoundError: net/fabricmc/fabric/api/client/event/lifecycle/v1/ClientLifecycleEvents.

What it needs from Kiln

• Mixin
• com.mojang.blaze3d.platform.NativeImage
• com.mojang.blaze3d.platform.Window
• com.mojang.blaze3d.platform.cursor.CursorTypes
• net.fabricmc.fabric.api.client.event.lifecycle.v1.ClientLifecycleEvents
• net.fabricmc.fabric.api.client.event.lifecycle.v1.ClientLifecycleEvents.ClientStopping
• net.minecraft.client.KeyboardHandler
• net.minecraft.client.User
• net.minecraft.client.gui.components.AbstractWidget
• net.minecraft.client.gui.components.Button
• net.minecraft.client.gui.components.Button.Builder
• net.minecraft.client.gui.components.Button.OnPress
• net.minecraft.client.gui.components.EditBox
• net.minecraft.client.input.KeyEvent
• net.minecraft.client.input.MouseButtonEvent
• net.minecraft.client.model.Model
• net.minecraft.client.model.Model.Simple
• net.minecraft.client.model.geom.EntityModelSet
• net.minecraft.client.model.geom.ModelLayerLocation
• net.minecraft.client.model.geom.ModelLayers
• 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.model.player.PlayerModel
• net.minecraft.client.renderer.RenderPipelines
• net.minecraft.client.renderer.rendertype.RenderTypes
• net.minecraft.client.renderer.texture.AbstractTexture
• net.minecraft.client.renderer.texture.DynamicTexture
• net.minecraft.client.renderer.texture.TextureManager
• net.minecraft.client.resources.SkinManager
• net.minecraft.client.resources.language.LanguageManager
• net.minecraft.client.resources.sounds.SimpleSoundInstance
• net.minecraft.client.sounds.SoundEngine
• net.minecraft.client.sounds.SoundEngine.PlayResult
• net.minecraft.client.sounds.SoundManager
• net.minecraft.core.ClientAsset
• net.minecraft.core.ClientAsset.Texture
• and 31 more

On the roadmap: Minecraft's libraries and client API (0.2), Code next to data (0.3), Mixin (0.5)

In the author's words

Choose any vanilla cape to use client-side.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file elytra-and-capes-2.3.3+fabric-mc26.3.jar. The scan reads the mod's classes; it does not run them.