CookieJar

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

Evidence

Ran on Kiln's test stand (2026-11-04): CookieJar did not start: java.lang.NoClassDefFoundError: org/apache/logging/log4j/LogManager.

What it needs from Kiln

Mixin
com.mojang.blaze3d.platform.InputConstants.Key
net.minecraft.TracingExecutor
net.minecraft.client.KeyboardHandler
net.minecraft.client.gui.components.AbstractSelectionList
net.minecraft.client.gui.components.AbstractSelectionList.Entry
net.minecraft.client.gui.components.AbstractWidget
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.ContainerObjectSelectionList
net.minecraft.client.gui.components.ContainerObjectSelectionList.Entry
net.minecraft.client.gui.components.EditBox
net.minecraft.client.gui.components.ImageButton
net.minecraft.client.gui.components.Tooltip
net.minecraft.client.gui.components.WidgetSprites
net.minecraft.client.multiplayer.ClientCommonPacketListenerImpl
net.minecraft.client.multiplayer.ServerData
net.minecraft.client.multiplayer.ServerData.Type
net.minecraft.client.multiplayer.resolver.ServerAddress
net.minecraft.locale.Language
net.minecraft.nbt.CompoundTag
net.minecraft.nbt.NbtAccounter
net.minecraft.nbt.NbtIo
net.minecraft.network.Connection
net.minecraft.network.PacketListener
net.minecraft.network.protocol.common.ClientboundStoreCookiePacket
net.minecraft.network.protocol.common.ClientboundTransferPacket
net.minecraft.network.protocol.cookie.ServerboundCookieResponsePacket
net.minecraft.util.Util
org.apache.commons.codec.DecoderException
org.apache.commons.codec.binary.Hex
org.apache.logging.log4j.LogManager
org.apache.logging.log4j.Logger
org.lwjgl.sdl.SDLDialog
org.lwjgl.sdl.SDLError
org.lwjgl.sdl.SDL_DialogFileCallback
org.lwjgl.sdl.SDL_DialogFileFilter
org.lwjgl.sdl.SDL_DialogFileFilter.Buffer
org.lwjgl.system.MemoryStack
org.lwjgl.system.MemoryUtil
and 4 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

Developer tool to view and edit cookies

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file cookiejar-0.2.7+26.3.jar. The scan reads the mod's classes; it does not run them.

Reports from players

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