SuperMartijn642's Core Lib

Evidence

Ran on Kiln's test stand (2026-11-04): CoreLib did not start: java.lang.NoClassDefFoundError: net/minecraft/core/RegistryAccess; CoreLibClient did not start: java.lang.NoSuchMethodError: 'java.util.Optional net.fabricmc.loader.api.FabricLoader.getModContainer(java.lang.String)'.

What it needs from Kiln

• an access widener
• Mixin
• com.mojang.authlib.GameProfile
• com.mojang.blaze3d.ProjectionType
• com.mojang.blaze3d.platform.cursor.CursorType
• com.mojang.blaze3d.platform.cursor.CursorTypes
• com.mojang.blaze3d.systems.RenderSystem
• com.mojang.blaze3d.systems.SamplerCache
• com.mojang.blaze3d.vertex.PoseStack
• com.mojang.renderpearl.api.GpuFormat
• com.mojang.renderpearl.api.commands.CommandEncoder
• com.mojang.renderpearl.api.commands.RenderPass
• com.mojang.renderpearl.api.device.GpuDevice
• com.mojang.renderpearl.api.textures.FilterMode
• com.mojang.renderpearl.api.textures.GpuTexture
• com.mojang.renderpearl.api.textures.GpuTextureView
• net.fabricmc.api.EnvType
• net.fabricmc.fabric.api.datagen.v1.FabricDataGenerator
• net.fabricmc.fabric.api.datagen.v1.FabricDataGenerator.Pack
• net.fabricmc.fabric.api.datagen.v1.FabricDataGenerator.Pack.Factory
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents.ServerStarting
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents.ServerStopped
• net.fabricmc.fabric.api.event.registry.RegistryEntryAddedCallback
• net.fabricmc.fabric.api.menu.v1.ExtendedMenuProvider
• net.fabricmc.fabric.api.menu.v1.ExtendedMenuType
• net.fabricmc.fabric.api.menu.v1.ExtendedMenuType.ExtendedFactory
• net.fabricmc.fabric.api.resource.conditions.v1.ResourceCondition
• net.fabricmc.fabric.api.resource.conditions.v1.ResourceConditionType
• net.fabricmc.fabric.api.resource.conditions.v1.ResourceConditions
• net.fabricmc.fabric.api.transfer.v1.fluid.FluidVariant
• net.fabricmc.fabric.api.transfer.v1.item.ItemVariant
• net.fabricmc.fabric.api.transfer.v1.storage.SlottedStorage
• net.fabricmc.fabric.api.transfer.v1.storage.Storage
• net.fabricmc.fabric.api.transfer.v1.storage.StorageView
• net.fabricmc.fabric.api.transfer.v1.storage.base.SingleSlotStorage
• net.fabricmc.fabric.api.transfer.v1.transaction.Transaction
• net.fabricmc.fabric.api.transfer.v1.transaction.TransactionContext
• net.fabricmc.fabric.impl.resource.pack.ModNioPackResources
• net.fabricmc.fabric.mixin.resource.conditions.RegistryOpsAccessor
• net.fabricmc.loader.api.ModContainer
• net.fabricmc.loader.api.entrypoint.EntrypointContainer
• and 81 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

SuperMartijn642's Core Lib adds lots of basic implementations that allow for similar code between different Minecraft versions!

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file supermartijn642corelib-1.1.26c-fabric-mc26.3.jar. The scan reads the mod's classes; it does not run them.