StructureCodex

Evidence

Ran on Kiln's test stand (2026-11-04): StructureCodex did not start: java.lang.NoClassDefFoundError: net/fabricmc/fabric/api/networking/v1/PayloadTypeRegistry; StructureCodexClient did not start: java.lang.NoClassDefFoundError: net/minecraft/client/gui/render/pip/PictureInPictureRenderer.

What it needs from Kiln

• Mixin
• com.mojang.blaze3d.buffers.Std140Builder
• com.mojang.blaze3d.systems.RenderSystem
• com.mojang.blaze3d.systems.SamplerCache
• com.mojang.blaze3d.vertex.BufferBuilder
• com.mojang.blaze3d.vertex.ByteBufferBuilder
• com.mojang.blaze3d.vertex.MeshData
• com.mojang.blaze3d.vertex.MeshData.DrawState
• com.mojang.blaze3d.vertex.PoseStack
• com.mojang.blaze3d.vertex.PoseStack.Pose
• com.mojang.blaze3d.vertex.VertexConsumer
• com.mojang.math.Axis
• com.mojang.renderpearl.api.buffers.GpuBuffer
• com.mojang.renderpearl.api.buffers.GpuBufferSlice
• com.mojang.renderpearl.api.commands.CommandEncoder
• com.mojang.renderpearl.api.commands.RenderPass
• com.mojang.renderpearl.api.commands.RenderPass.Draw
• com.mojang.renderpearl.api.commands.RenderPass.RenderArea
• com.mojang.renderpearl.api.commands.RenderPass.UniformUploader
• com.mojang.renderpearl.api.device.GpuDevice
• com.mojang.renderpearl.api.pipeline.IndexType
• com.mojang.renderpearl.api.pipeline.RenderPipeline
• com.mojang.renderpearl.api.textures.FilterMode
• com.mojang.renderpearl.api.textures.GpuSampler
• com.mojang.renderpearl.api.textures.GpuTextureView
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayNetworking
• net.fabricmc.fabric.api.client.rendering.v1.PictureInPictureRendererRegistry
• net.fabricmc.fabric.api.client.rendering.v1.PictureInPictureRendererRegistry.Context
• net.fabricmc.fabric.api.client.rendering.v1.PictureInPictureRendererRegistry.Factory
• 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.loader.api.ModContainer
• net.fabricmc.loader.api.metadata.ModMetadata
• net.minecraft.client.ClientClockManager
• net.minecraft.client.gui.components.AbstractButton
• net.minecraft.client.gui.components.AbstractSelectionList
• net.minecraft.client.gui.components.AbstractSelectionList.Entry
• net.minecraft.client.gui.components.Button
• net.minecraft.client.gui.components.Button.Builder
• and 80 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

Browse every structure in 3D, then drop it into your world

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file structurecodex-1.1.0+26.3.jar. The scan reads the mod's classes; it does not run them.