HCsCR

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

Evidence

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

What it needs from Kiln

Mixin
com.mojang.blaze3d.platform.InputConstants.Key
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.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.PacketSender
net.fabricmc.fabric.api.networking.v1.PayloadTypeRegistry
net.minecraft.client.gui.Hud
net.minecraft.client.gui.components.AbstractSliderButton
net.minecraft.client.gui.components.Button
net.minecraft.client.gui.components.Button.Builder
net.minecraft.client.gui.components.Button.OnPress
net.minecraft.client.gui.components.Checkbox
net.minecraft.client.gui.components.Checkbox.Builder
net.minecraft.client.gui.components.Checkbox.OnValueChange
net.minecraft.client.gui.components.Tooltip
net.minecraft.client.resources.sounds.SimpleSoundInstance
net.minecraft.client.sounds.SoundEngine
net.minecraft.client.sounds.SoundEngine.PlayResult
net.minecraft.client.sounds.SoundManager
net.minecraft.network.FriendlyByteBuf
net.minecraft.network.chat.CommonComponents
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.util.Mth
net.minecraft.util.profiling.ProfilerFiller
net.minecraft.world.damagesource.DamageSource
net.minecraft.world.effect.MobEffect
net.minecraft.world.effect.MobEffectInstance
net.minecraft.world.entity.Interaction
net.minecraft.world.entity.ai.attributes.AttributeMap
net.minecraft.world.entity.boss.enderdragon.EndCrystal
net.minecraft.world.entity.monster.cubemob.AbstractCubeMob
net.minecraft.world.phys.AABB
org.apache.logging.log4j.LogManager
org.apache.logging.log4j.Logger
and 19 more

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

Remove your end crystals before the server even knows you hit 'em! (a "crystal optimizer")

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file HCsCR-2.1.14+26.3-fabric.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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