YT Party

Evidence

Ran on Kiln's test stand (2026-11-04): YtPartyMain did not start: java.lang.NoClassDefFoundError: net/minecraft/network/protocol/common/custom/CustomPacketPayload; YtPartyClient did not start: java.lang.NoClassDefFoundError: org/lwjgl/system/MemoryUtil.

What it needs from Kiln

• com.mojang.authlib.GameProfile
• com.mojang.blaze3d.platform.NativeImage
• com.mojang.blaze3d.platform.Window
• com.mojang.blaze3d.systems.RenderSystem
• com.mojang.blaze3d.systems.SamplerCache
• com.mojang.renderpearl.api.textures.FilterMode
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayConnectionEvents
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayConnectionEvents.Disconnect
• 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.client.screen.v1.ScreenEvents
• net.fabricmc.fabric.api.client.screen.v1.ScreenEvents.AfterBackground
• net.fabricmc.fabric.api.client.screen.v1.ScreenEvents.AfterInit
• net.fabricmc.fabric.api.client.screen.v1.Screens
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents.ServerStarted
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents.ServerStopped
• net.fabricmc.fabric.api.networking.v1.PayloadTypeRegistry
• net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents
• net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents.Disconnect
• net.fabricmc.fabric.api.networking.v1.ServerPlayNetworking
• net.fabricmc.fabric.api.networking.v1.ServerPlayNetworking.Context
• net.fabricmc.fabric.api.networking.v1.ServerPlayNetworking.PlayPayloadHandler
• net.minecraft.client.User
• 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.EditBox
• net.minecraft.client.gui.components.EditBox.TextFormatter
• net.minecraft.client.gui.components.MultiLineEditBox
• net.minecraft.client.gui.components.MultiLineEditBox.Builder
• net.minecraft.client.gui.components.MultiLineTextWidget
• net.minecraft.client.gui.components.StringWidget
• net.minecraft.client.gui.components.Tooltip
• net.minecraft.client.gui.components.toasts.SystemToast
• net.minecraft.client.gui.components.toasts.SystemToast.SystemToastId
• net.minecraft.client.gui.components.toasts.ToastManager
• net.minecraft.client.gui.screens.TitleScreen
• and 31 more

On the roadmap: Minecraft's libraries and client API (0.2), Code next to data (0.3)

In the author's words

A client-side Fabric mod fetches, decodes and plays YouTube audio itself (playlist, play/pause, volume, seek) and keeps the playlist order, current track and pause state in sync per "party".

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file ytparty-2026-10-31-149-bundle.jar. The scan reads the mod's classes; it does not run them.