Folders! (Worlds & Servers)

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

Evidence

Ran on Kiln's test stand (2026-11-04): OrganizablePlayScreens did not start: java.lang.NoClassDefFoundError: net/minecraft/client/gui/components/Tooltip.

What it needs from Kiln

an access widener
Mixin
com.mojang.blaze3d.platform.NativeImage
com.mojang.blaze3d.platform.NativeImage.Format
com.mojang.renderpearl.api.pipeline.RenderPipeline
net.minecraft.SharedConstants
net.minecraft.WorldVersion
net.minecraft.client.OptionInstance
net.minecraft.client.OptionInstance.CaptionBasedToString
net.minecraft.client.OptionInstance.Enum
net.minecraft.client.OptionInstance.IntRangeBase
net.minecraft.client.OptionInstance.SliderableValueSet
net.minecraft.client.OptionInstance.TooltipSupplier
net.minecraft.client.OptionInstance.ValueSet
net.minecraft.client.OptionInstance.ValueUpdateListener
net.minecraft.client.Options
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.OnPress
net.minecraft.client.gui.components.EditBox
net.minecraft.client.gui.components.ObjectSelectionList
net.minecraft.client.gui.components.ObjectSelectionList.Entry
net.minecraft.client.gui.components.SelectableEntry
net.minecraft.client.gui.components.SpriteIconButton
net.minecraft.client.gui.components.SpriteIconButton.Builder
net.minecraft.client.gui.components.StringWidget
net.minecraft.client.gui.components.Tooltip
net.minecraft.client.gui.components.WidgetSprites
net.minecraft.client.gui.layouts.GridLayout
net.minecraft.client.gui.layouts.GridLayout.RowHelper
net.minecraft.client.gui.layouts.HeaderAndFooterLayout
net.minecraft.client.gui.screens.FaviconTexture
net.minecraft.client.gui.screens.multiplayer.JoinMultiplayerScreen
net.minecraft.client.gui.screens.multiplayer.ServerSelectionList
net.minecraft.client.gui.screens.multiplayer.ServerSelectionList.Entry
net.minecraft.client.gui.screens.multiplayer.ServerSelectionList.LANHeader
net.minecraft.client.gui.screens.multiplayer.ServerSelectionList.NetworkServerEntry
net.minecraft.client.gui.screens.multiplayer.ServerSelectionList.OnlineServerEntry
net.minecraft.client.gui.screens.options.OptionsSubScreen
net.minecraft.client.gui.screens.worldselection.SelectWorldScreen
and 42 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

Organize your worlds and servers with folders in the play screens.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file organizable-play-screens-1.3.3+26.3.jar. The scan reads the mod's classes; it does not run them.

Reports from players

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