Now Playing

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

Evidence

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

What it needs from Kiln

an access widener
Mixin
com.mojang.blaze3d.platform.InputConstants.Key
net.fabricmc.fabric.api.client.command.v2.ClientCommandRegistrationCallback
net.fabricmc.fabric.api.resource.v1.ResourceLoader
net.minecraft.client.GameNarrator
net.minecraft.client.gui.Hud
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.MultiLineTextWidget
net.minecraft.client.gui.components.toasts.Toast
net.minecraft.client.gui.components.toasts.Toast.Visibility
net.minecraft.client.gui.components.toasts.ToastManager
net.minecraft.client.gui.screens.ChatScreen
net.minecraft.client.gui.screens.ConfirmLinkScreen
net.minecraft.client.renderer.RenderPipelines
net.minecraft.client.sounds.MusicManager
net.minecraft.commands.Commands
net.minecraft.locale.Language
net.minecraft.network.chat.CommonComponents
net.minecraft.server.packs.PackType
net.minecraft.server.packs.resources.PreparableReloadListener
net.minecraft.server.packs.resources.PreparableReloadListener.PreparationBarrier
net.minecraft.server.packs.resources.PreparableReloadListener.SharedState
net.minecraft.server.packs.resources.Resource
net.minecraft.server.packs.resources.ResourceManager
net.minecraft.sounds.Music
net.minecraft.util.FormattedCharSequence
org.apache.logging.log4j.LogManager
org.apache.logging.log4j.Logger
org.apache.logging.log4j.message.AbstractMessageFactory
org.apache.logging.log4j.message.FormattedMessage
org.apache.logging.log4j.message.SimpleMessage
InputConstants.UNKNOWN
Minecraft.getNarrator()
Minecraft.getResourceManager()
Minecraft.getSituationalMusic()
Minecraft.schedule()
Font.split()
Gui.hud
Gui.toastManager()
and 6 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

Displays a "Now Playing" popup whenever the music changes.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file nowplaying-fabric-2.104.1+26.3.jar. The scan reads the mod's classes; it does not run them.

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