Double Jump Boost

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

Evidence

Ran on Kiln's test stand (2026-11-04): DoubleJumpBoost did not start: java.lang.NoSuchFieldError: Class net.minecraft.core.registries.BuiltInRegistries does not have member field 'net.minecraft.core.Registry ATTRIBUTE'; DoubleJumpBoostClient did not start: java.lang.NoClassDefFoundError: net/minecraft/network/protocol/common/custom/CustomPacketPayload.

What it needs from Kiln

Mixin
net.fabricmc.fabric.api.attachment.v1.AttachmentRegistry
net.fabricmc.fabric.api.client.networking.v1.ClientPlayNetworking
net.fabricmc.fabric.api.client.networking.v1.ClientPlayNetworking.Context
net.fabricmc.fabric.api.client.networking.v1.ClientPlayNetworking.PlayPayloadHandler
net.fabricmc.fabric.api.networking.v1.PayloadTypeRegistry
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.world.entity.ai.attributes.Attribute.Sentiment
net.minecraft.world.entity.ai.attributes.RangedAttribute
BuiltInRegistries.ATTRIBUTE
Attribute.setSyncable()
Player.getAttachedOrElse()
Player.getAttachedOrSet()
Player.setAttached()

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

Turns Jump Boost into a double (or triple) jump!

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file doublejumpboost-1.1.3+26.1.jar. The scan reads the mod's classes; it does not run them.

Reports from players

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