Useful Hats

Evidence

Ran on Kiln's test stand (2026-11-04): UsefulHatsFabricMod did not start: java.lang.NoClassDefFoundError: org/apache/logging/log4j/LogManager; UsefulHatsFabricClientMod did not start: java.lang.NoClassDefFoundError: net/fabricmc/fabric/api/client/rendering/v1/ArmorRenderer.

What it needs from Kiln

• an access widener
• Mixin
• com.mojang.blaze3d.vertex.PoseStack
• net.fabricmc.fabric.api.client.rendering.v1.ArmorRenderer
• net.fabricmc.fabric.api.client.rendering.v1.ModelLayerRegistry
• net.fabricmc.fabric.api.client.rendering.v1.ModelLayerRegistry.TexturedLayerDefinitionProvider
• net.fabricmc.fabric.api.creativetab.v1.FabricCreativeModeTab
• net.minecraft.client.model.EntityModel
• net.minecraft.client.model.HumanoidModel
• net.minecraft.client.model.geom.EntityModelSet
• net.minecraft.client.model.geom.LayerDefinitions
• net.minecraft.client.model.geom.ModelLayerLocation
• net.minecraft.client.model.geom.ModelPart
• net.minecraft.client.model.geom.PartPose
• net.minecraft.client.model.geom.builders.CubeDeformation
• net.minecraft.client.model.geom.builders.CubeListBuilder
• net.minecraft.client.model.geom.builders.LayerDefinition
• net.minecraft.client.model.geom.builders.MeshDefinition
• net.minecraft.client.model.geom.builders.PartDefinition
• net.minecraft.client.renderer.OrderedSubmitNodeCollector
• net.minecraft.client.renderer.SubmitNodeCollector
• net.minecraft.client.renderer.entity.EntityRenderDispatcher
• net.minecraft.client.renderer.entity.state.HumanoidRenderState
• net.minecraft.client.renderer.entity.state.LivingEntityRenderState
• net.minecraft.client.renderer.rendertype.RenderType
• net.minecraft.client.renderer.rendertype.RenderTypes
• net.minecraft.client.renderer.texture.OverlayTexture
• net.minecraft.client.resources.model.EquipmentAssetManager
• net.minecraft.client.resources.model.EquipmentClientInfo
• net.minecraft.client.resources.model.EquipmentClientInfo.Dyeable
• net.minecraft.client.resources.model.EquipmentClientInfo.Layer
• net.minecraft.client.resources.model.EquipmentClientInfo.LayerType
• net.minecraft.core.component.DataComponentType
• net.minecraft.core.component.DataComponentType.Builder
• net.minecraft.core.component.DataComponents
• net.minecraft.network.codec.StreamCodec
• net.minecraft.network.protocol.game.ClientboundSetActionBarTextPacket
• net.minecraft.server.MinecraftServer
• net.minecraft.server.network.ServerGamePacketListenerImpl
• net.minecraft.stats.StatType
• net.minecraft.stats.Stats
• net.minecraft.tags.BlockTags
• and 81 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

Hats with special abilities.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file usefulhats-fabric-26.3-7.3.0.0.jar. The scan reads the mod's classes; it does not run them.