Geckolib

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

Evidence

Ran on Kiln's test stand (2026-11-04): GeckoLib did not start: java.lang.NoClassDefFoundError: org/apache/logging/log4j/LogManager; GeckoLibClient did not start: java.lang.NoClassDefFoundError: net/minecraft/server/packs/resources/PreparableReloadListener.

What it needs from Kiln

an access widener
Mixin
com.mojang.blaze3d.Blaze3D
com.mojang.blaze3d.platform.Lighting
com.mojang.blaze3d.platform.Lighting.Entry
com.mojang.blaze3d.vertex.PoseStack
com.mojang.blaze3d.vertex.PoseStack.Pose
com.mojang.blaze3d.vertex.VertexConsumer
com.mojang.math.Axis
com.mojang.renderpearl.api.textures.GpuTexture
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.resource.v1.ResourceLoader
net.minecraft.client.Camera
net.minecraft.client.CameraType
net.minecraft.client.Options
net.minecraft.client.gui.Hud
net.minecraft.client.model.HumanoidModel
net.minecraft.client.model.geom.EntityModelSet
net.minecraft.client.model.geom.ModelLayers
net.minecraft.client.model.geom.ModelPart
net.minecraft.client.model.object.equipment.ElytraModel
net.minecraft.client.renderer.GameRenderer
net.minecraft.client.renderer.LevelRenderer
net.minecraft.client.renderer.OrderedSubmitNodeCollector
net.minecraft.client.renderer.SubmitNodeCollector
net.minecraft.client.renderer.SubmitNodeCollector.CustomGeometryRenderer
net.minecraft.client.renderer.block.BlockModelRenderState
net.minecraft.client.renderer.block.BlockModelResolver
net.minecraft.client.renderer.block.model.BlockDisplayContext
net.minecraft.client.renderer.blockentity.BlockEntityRenderDispatcher
net.minecraft.client.renderer.blockentity.BlockEntityRenderer
net.minecraft.client.renderer.blockentity.BlockEntityRendererProvider
net.minecraft.client.renderer.blockentity.BlockEntityRendererProvider.Context
net.minecraft.client.renderer.blockentity.state.BlockEntityRenderState
net.minecraft.client.renderer.entity.ArmorModelSet
net.minecraft.client.renderer.entity.EntityRenderDispatcher
net.minecraft.client.renderer.entity.EntityRenderer
net.minecraft.client.renderer.entity.EntityRendererProvider
net.minecraft.client.renderer.entity.EntityRendererProvider.Context
net.minecraft.client.renderer.entity.LivingEntityRenderer
and 82 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

A 3D animation library for entities, blocks, items, armor, and more!

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file geckolib-fabric-26.3-5.5.7.jar. The scan reads the mod's classes; it does not run them.

Reports from players

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