Oxidizable Copper Gear

Evidence

Ran on Kiln's test stand (2026-11-04): FabricEntrypoint did not start: java.lang.NoSuchFieldError: Class net.minecraft.core.registries.BuiltInRegistries does not have member field 'net.minecraft.core.Registry DATA_COMPONENT_TYPE'; FabricClientEntrypoint did not start: java.lang.NoSuchMethodError: 'java.util.Optional net.fabricmc.loader.api.FabricLoader.getModContainer(java.lang.String)'.

What it needs from Kiln

• Mixin
• net.fabricmc.fabric.api.resource.v1.ResourceLoader
• net.fabricmc.fabric.api.resource.v1.pack.PackActivationType
• net.minecraft.core.NonNullList
• net.minecraft.core.component.DataComponentType
• net.minecraft.core.component.DataComponentType.Builder
• net.minecraft.network.codec.StreamCodec
• net.minecraft.tags.ItemTags
• net.minecraft.tags.TagKey
• net.minecraft.util.Mth
• net.minecraft.world.item.crafting.CraftingInput
• net.minecraft.world.item.crafting.CustomRecipe
• net.minecraft.world.item.crafting.RecipeSerializer
• FabricCreativeModeTabOutput.insertAfter()
• FabricLoader.getModContainer()
• FabricLoader.isDevelopmentEnvironment()
• FabricLoader.isModLoaded()
• DefaultedRegistry.getTagOrEmpty()
• BuiltInRegistries.DATA_COMPONENT_TYPE
• BuiltInRegistries.RECIPE_SERIALIZER
• CreativeModeTab.contains()
• ItemStack.<init>()
• ItemStack.getDamageValue()
• ItemStack.getHoverName()
• ItemStack.getMaxDamage()
• ItemStack.getOrDefault()
• ItemStack.has()
• ItemStack.is()
• ItemStack.is()
• ItemStack.isDamageableItem()
• ItemStack.remove()
• ItemStack.set()
• ItemStack.setDamageValue()
• Items.HONEYCOMB

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

Adds oxidation and waxing mechanics to copper tools and armor

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file oxidizable_copper_gear-fabric-1.3.0+26.1.2.jar. The scan reads the mod's classes; it does not run them.