Composter Compatibilities

Calls something that is on Kiln's roadmap. Parts of it may already run.

Evidence

Ran on Kiln's test stand (2026-11-04): ComposterCompatMod did not start: java.lang.NoClassDefFoundError: net/minecraft/network/protocol/common/custom/CustomPacketPayload; ComposterCompatClient did not start: java.lang.NoClassDefFoundError: net/minecraft/network/protocol/common/custom/CustomPacketPayload.

What it needs from Kiln

Mixin
net.fabricmc.fabric.api.client.networking.v1.ClientConfigurationNetworking
net.fabricmc.fabric.api.client.networking.v1.ClientConfigurationNetworking.ConfigurationPayloadHandler
net.fabricmc.fabric.api.client.networking.v1.ClientConfigurationNetworking.Context
net.fabricmc.fabric.api.event.lifecycle.v1.CommonLifecycleEvents
net.fabricmc.fabric.api.event.lifecycle.v1.CommonLifecycleEvents.TagsLoaded
net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents
net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents.ServerStarted
net.fabricmc.fabric.api.networking.v1.PayloadTypeRegistry
net.fabricmc.fabric.api.networking.v1.ServerConfigurationConnectionEvents
net.fabricmc.fabric.api.networking.v1.ServerConfigurationConnectionEvents.Configure
net.fabricmc.fabric.api.networking.v1.ServerConfigurationNetworking
net.minecraft.core.RegistryAccess
net.minecraft.core.RegistryAccess.Frozen
net.minecraft.core.component.DataComponentMap
net.minecraft.core.component.DataComponentMap.Builder
net.minecraft.core.component.DataComponents
net.minecraft.network.FriendlyByteBuf
net.minecraft.network.protocol.common.custom.CustomPacketPayload
net.minecraft.network.protocol.common.custom.CustomPacketPayload.Type
net.minecraft.network.protocol.common.custom.CustomPacketPayload.TypeAndCodec
net.minecraft.server.MinecraftServer
net.minecraft.tags.TagKey
net.minecraft.world.Container
net.minecraft.world.entity.item.ItemEntity
net.minecraft.world.food.FoodProperties
net.minecraft.world.item.ItemStackTemplate
net.minecraft.world.item.component.Compostable
net.minecraft.world.item.component.UseRemainder
net.minecraft.world.item.crafting.Ingredient
net.minecraft.world.item.crafting.PlacementInfo
net.minecraft.world.item.crafting.Recipe
net.minecraft.world.item.crafting.RecipeHolder
net.minecraft.world.item.crafting.RecipeManager
net.minecraft.world.item.crafting.display.RecipeDisplay
net.minecraft.world.item.crafting.display.SlotDisplay
net.minecraft.world.item.crafting.display.SlotDisplay.ItemStackSlotDisplay
net.minecraft.world.level.EmptyBlockGetter
net.minecraft.world.level.block.BonemealableBlock
net.minecraft.world.level.block.FlowerBlock
net.minecraft.world.level.block.HangingRootsBlock
and 37 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

Makes a lot of items compostable! DYNAMICALLY! For any mod.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file composter_compat-fabric-26.3-2.0.0.jar. The scan reads the mod's classes; it does not run them.

Reports from players

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