In-Game Account Switcher

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

Evidence

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

What it needs from Kiln

Mixin
com.mojang.authlib.minecraft.SessionService
com.mojang.authlib.minecraft.UserApiService
com.mojang.authlib.minecraft.UserApiService.UserProperties
com.mojang.authlib.services.MinecraftServicesDiscoveryService
com.mojang.authlib.services.ProfileResult
com.mojang.blaze3d.Blaze3D
com.mojang.blaze3d.platform.Window
com.mojang.renderpearl.api.pipeline.RenderPipeline
net.fabricmc.fabric.api.client.event.lifecycle.v1.ClientLifecycleEvents
net.fabricmc.fabric.api.client.event.lifecycle.v1.ClientLifecycleEvents.ClientStopping
net.fabricmc.fabric.api.client.screen.v1.ScreenEvents
net.fabricmc.fabric.api.client.screen.v1.ScreenEvents.AfterExtract
net.fabricmc.fabric.api.client.screen.v1.ScreenEvents.AfterInit
net.fabricmc.fabric.api.client.screen.v1.Screens
net.minecraft.client.GameNarrator
net.minecraft.client.KeyboardHandler
net.minecraft.client.User
net.minecraft.client.gui.ActiveTextCollector
net.minecraft.client.gui.ActiveTextCollector.Parameters
net.minecraft.client.gui.TextAlignment
net.minecraft.client.gui.components.AbstractSelectionList
net.minecraft.client.gui.components.AbstractSelectionList.Entry
net.minecraft.client.gui.components.Button
net.minecraft.client.gui.components.Button.Builder
net.minecraft.client.gui.components.Button.CreateNarration
net.minecraft.client.gui.components.Button.OnPress
net.minecraft.client.gui.components.EditBox
net.minecraft.client.gui.components.EditBox.TextFormatter
net.minecraft.client.gui.components.ImageButton
net.minecraft.client.gui.components.MultiLineLabel
net.minecraft.client.gui.components.ObjectSelectionList
net.minecraft.client.gui.components.ObjectSelectionList.Entry
net.minecraft.client.gui.components.PlayerFaceExtractor
net.minecraft.client.gui.components.PlayerSkinWidget
net.minecraft.client.gui.components.Tooltip
net.minecraft.client.gui.components.WidgetSprites
net.minecraft.client.gui.components.events.GuiEventListener
net.minecraft.client.gui.components.toasts.SystemToast
net.minecraft.client.gui.components.toasts.SystemToast.SystemToastId
net.minecraft.client.gui.components.toasts.ToastManager
and 57 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

This mod allows you to change your logged in account in-game, without restarting Minecraft

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file IAS-9.0.8+26.3-fabric.jar. The scan reads the mod's classes; it does not run them.

Reports from players

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