Optional Pickup

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

Evidence

Ran on Kiln's test stand (2026-11-04): OptionalPickup did not start: java.lang.NoClassDefFoundError: net/fabricmc/fabric/api/networking/v1/PayloadTypeRegistry; OptionalPickupClient did not start: java.lang.NoClassDefFoundError: org/apache/logging/log4j/LogManager.

What it needs from Kiln

Mixin
net.fabricmc.fabric.api.client.networking.v1.ClientPlayNetworking
net.fabricmc.fabric.api.networking.v1.PayloadTypeRegistry
net.fabricmc.fabric.api.networking.v1.ServerPlayNetworking
net.fabricmc.fabric.api.networking.v1.ServerPlayNetworking.Context
net.fabricmc.fabric.api.networking.v1.ServerPlayNetworking.PlayPayloadHandler
net.minecraft.core.component.DataComponentMap
net.minecraft.core.component.DataComponents
net.minecraft.network.codec.ByteBufCodecs
net.minecraft.network.codec.StreamCodec
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.tags.ItemTags
net.minecraft.world.entity.item.ItemEntity
net.minecraft.world.item.Item.TooltipContext
net.minecraft.world.item.TooltipFlag
net.minecraft.world.item.TooltipFlag.Default
net.minecraft.world.phys.AABB
org.apache.logging.log4j.LogManager
KeyMapping.getTranslatedKeyMessage()
ClientLevel.getEntitiesOfClass()
LocalPlayer.getBoundingBox()
Identifier.tryParse()
ServerLevel.getEntity()
ServerPlayer.isRemoved()
ItemStack.copyWithCount()
ItemStack.getComponents()
ItemStack.getHoverName()
ItemStack.getTooltipLines()
ItemStack.hashItemAndComponents()
ItemStack.is()
ItemStack.isSameItemSameComponents()
Items.HONEY_BOTTLE
Items.LINGERING_POTION
Items.MILK_BUCKET
Items.PAINTING
Items.POTION
Items.SPLASH_POTION
Items.SUSPICIOUS_STEW

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

Pick up items with your own choice.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file optional_pickup-0.1.5-mc26.3.jar. The scan reads the mod's classes; it does not run them.

Reports from players

No reports from players yet.

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