Cirrus

Evidence

Ran on Kiln's test stand (2026-11-04): CirrusFabric did not start: java.lang.NoClassDefFoundError: net/minecraft/network/chat/ClickEvent.

What it needs from Kiln

• Mixin
• com.mojang.blaze3d.buffers.Std140Builder
• com.mojang.blaze3d.systems.RenderSystem
• com.mojang.blaze3d.vertex.DefaultVertexFormat
• com.mojang.blaze3d.vertex.PoseStack
• com.mojang.blaze3d.vertex.PoseStack.Pose
• com.mojang.blaze3d.vertex.VertexConsumer
• com.mojang.renderpearl.api.GpuFormat
• com.mojang.renderpearl.api.buffers.GpuBuffer
• com.mojang.renderpearl.api.commands.CommandEncoder
• com.mojang.renderpearl.api.commands.RenderPass
• com.mojang.renderpearl.api.device.DeviceInfo
• com.mojang.renderpearl.api.device.GpuDevice
• com.mojang.renderpearl.api.pipeline.BindGroupLayout
• com.mojang.renderpearl.api.pipeline.BindGroupLayout.Builder
• com.mojang.renderpearl.api.pipeline.BlendFunction
• com.mojang.renderpearl.api.pipeline.ColorTargetState
• com.mojang.renderpearl.api.pipeline.CompareOp
• com.mojang.renderpearl.api.pipeline.DepthStencilState
• com.mojang.renderpearl.api.pipeline.PrimitiveTopology
• com.mojang.renderpearl.api.pipeline.RenderPipeline
• com.mojang.renderpearl.api.pipeline.RenderPipeline.Builder
• com.mojang.renderpearl.api.pipeline.RenderPipeline.Snippet
• com.mojang.renderpearl.api.pipeline.UniformType
• com.mojang.renderpearl.api.textures.GpuTextureView
• com.mojang.renderpearl.api.vertex.VertexFormat
• net.fabricmc.fabric.api.client.command.v2.ClientCommandRegistrationCallback
• net.fabricmc.fabric.api.client.command.v2.ClientCommands
• net.fabricmc.fabric.api.client.command.v2.FabricClientCommandSource
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayConnectionEvents
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayConnectionEvents.Disconnect
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayConnectionEvents.Join
• net.minecraft.client.Camera
• net.minecraft.client.renderer.DynamicGpuDataStorage
• net.minecraft.client.renderer.DynamicGpuDataStorage.DynamicGpuData
• net.minecraft.client.renderer.DynamicGpuDataStorageMapped
• net.minecraft.client.renderer.GameRenderer
• net.minecraft.client.renderer.RenderPipelines
• net.minecraft.client.renderer.SubmitNodeCollector
• net.minecraft.client.renderer.SubmitNodeCollector.CustomGeometryRenderer
• net.minecraft.client.renderer.oit.OitPipelineSet
• 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

Cloud & skybox overhaul mod.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file cirrus-fabric-26.3-1.4.2.jar. The scan reads the mod's classes; it does not run them.