NeoSpeed Zero

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

Evidence

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

What it needs from Kiln

Mixin
io.netty.buffer.ByteBuf
io.netty.buffer.ByteBufUtil
io.netty.buffer.Unpooled
net.minecraft.advancements.predicates.DataComponentMatchers
net.minecraft.advancements.predicates.EnchantmentPredicate
net.minecraft.advancements.predicates.ItemPredicate
net.minecraft.advancements.predicates.ItemPredicate.Builder
net.minecraft.advancements.predicates.MinMaxBounds
net.minecraft.advancements.predicates.MinMaxBounds.Ints
net.minecraft.client.gui.components.Button
net.minecraft.client.gui.components.Button.OnPress
net.minecraft.client.gui.screens.inventory.PageButton
net.minecraft.client.renderer.RenderPipelines
net.minecraft.commands.CommandSourceStack
net.minecraft.commands.Commands
net.minecraft.commands.SharedSuggestionProvider
net.minecraft.commands.arguments.EntityArgument
net.minecraft.commands.arguments.IdentifierArgument
net.minecraft.core.HolderSet
net.minecraft.core.HolderSet.Direct
net.minecraft.core.RegistryAccess
net.minecraft.core.RegistryAccess.Frozen
net.minecraft.core.UUIDUtil
net.minecraft.core.component.DataComponentExactPredicate
net.minecraft.core.component.DataComponentGetter
net.minecraft.core.component.DataComponentPatch
net.minecraft.core.component.DataComponentPatch.Builder
net.minecraft.core.component.DataComponents
net.minecraft.core.component.predicates.BundlePredicate
net.minecraft.core.component.predicates.DamagePredicate
net.minecraft.core.component.predicates.DataComponentPredicate
net.minecraft.core.component.predicates.DataComponentPredicate.Type
net.minecraft.core.component.predicates.DataComponentPredicates
net.minecraft.core.component.predicates.EnchantmentsPredicate
net.minecraft.core.component.predicates.JukeboxPlayablePredicate
net.minecraft.core.component.predicates.PotionsPredicate
net.minecraft.core.component.predicates.TrimPredicate
net.minecraft.core.registries.codec.RegistryCodecs
net.minecraft.nbt.CompoundTag
net.minecraft.nbt.NbtIo
and 66 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

Customizable Speedrun Goals (Data Pack-driven)

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file neospeedzero-6.5.0-universal.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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