Flopper

Evidence

Ran on Kiln's test stand (2026-11-04): FlopperFabric did not start: java.lang.NoClassDefFoundError: net/fabricmc/fabric/api/client/particle/v1/ParticleProviderRegistry$PendingParticleProvider.

What it needs from Kiln

• an access widener
• Mixin
• com.mojang.blaze3d.vertex.PoseStack
• com.mojang.blaze3d.vertex.PoseStack.Pose
• com.mojang.blaze3d.vertex.VertexConsumer
• net.fabricmc.fabric.api.lookup.v1.block.BlockApiLookup
• net.fabricmc.fabric.api.transfer.v1.context.ContainerItemContext
• net.fabricmc.fabric.api.transfer.v1.fluid.FluidConstants
• net.fabricmc.fabric.api.transfer.v1.fluid.FluidStorage
• net.fabricmc.fabric.api.transfer.v1.fluid.FluidVariant
• net.fabricmc.fabric.api.transfer.v1.fluid.FluidVariantAttributes
• net.fabricmc.fabric.api.transfer.v1.storage.Storage
• net.fabricmc.fabric.api.transfer.v1.storage.StorageView
• net.fabricmc.fabric.api.transfer.v1.storage.base.SingleVariantStorage
• net.minecraft.client.renderer.SubmitNodeCollector
• net.minecraft.client.renderer.SubmitNodeCollector.CustomGeometryRenderer
• net.minecraft.client.renderer.blockentity.BlockEntityRenderer
• net.minecraft.client.renderer.blockentity.BlockEntityRendererProvider
• net.minecraft.client.renderer.blockentity.BlockEntityRendererProvider.Context
• net.minecraft.client.renderer.blockentity.state.BlockEntityRenderState
• net.minecraft.client.renderer.feature.ModelFeatureRenderer
• net.minecraft.client.renderer.feature.ModelFeatureRenderer.CrumblingOverlay
• net.minecraft.client.renderer.rendertype.RenderTypes
• net.minecraft.client.renderer.texture.TextureAtlasSprite
• net.minecraft.gametest.framework.GameTestAssertException
• net.minecraft.gametest.framework.GameTestHelper
• net.minecraft.world.attribute.EnvironmentAttributeSystem
• net.minecraft.world.attribute.EnvironmentAttributes
• net.minecraft.world.entity.Pose
• net.minecraft.world.item.CreativeModeTab.Builder
• net.minecraft.world.level.GameType
• net.minecraft.world.level.block.BaseEntityBlock
• net.minecraft.world.level.block.LayeredCauldronBlock
• net.minecraft.world.level.block.LiquidBlock
• net.minecraft.world.level.block.Mirror
• net.minecraft.world.level.block.RenderShape
• net.minecraft.world.level.block.Rotation
• net.minecraft.world.level.block.SimpleWaterloggedBlock
• net.minecraft.world.level.block.entity.BlockEntityTicker
• net.minecraft.world.level.block.entity.BlockEntityType
• net.minecraft.world.level.block.entity.BlockEntityType.BlockEntitySupplier
• net.minecraft.world.level.material.FlowingFluid
• and 35 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

A hopper for transferring fluids

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file flopper-26.3-fabric-1.1.9-272.jar. The scan reads the mod's classes; it does not run them.