Always Multiplayer

Evidence

Ran on Kiln's test stand (2026-11-04): Fabric did not start: java.lang.NoClassDefFoundError: net/fabricmc/fabric/api/event/lifecycle/v1/ServerLifecycleEvents; FabricClient did not start: java.lang.NoSuchFieldError: Class com.mojang.blaze3d.platform.InputConstants does not have member field 'com.mojang.blaze3d.platform.InputConstants$Key UNKNOWN'.

What it needs from Kiln

• Mixin
• com.mojang.authlib.GameProfile
• com.mojang.authlib.GameProfileRepository
• com.mojang.authlib.services.MinecraftServicesDiscoveryService
• com.mojang.authlib.services.response.NameAndId
• com.mojang.blaze3d.platform.InputConstants.Key
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayConnectionEvents
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayConnectionEvents.Join
• net.fabricmc.fabric.api.command.v2.CommandRegistrationCallback
• 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.ServerLoginConnectionEvents
• net.fabricmc.fabric.api.networking.v1.ServerLoginConnectionEvents.QueryStart
• net.fabricmc.fabric.api.networking.v1.ServerLoginNetworking
• net.fabricmc.fabric.api.networking.v1.ServerLoginNetworking.LoginSynchronizer
• net.minecraft.client.GameNarrator
• net.minecraft.client.OptionInstance
• net.minecraft.client.OptionInstance.TooltipSupplier
• 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.ChatComponent
• net.minecraft.client.gui.components.CycleButton
• net.minecraft.client.gui.components.CycleButton.Builder
• net.minecraft.client.gui.components.CycleButton.OnValueChange
• net.minecraft.client.gui.components.EditBox
• net.minecraft.client.gui.components.OptionsList
• net.minecraft.client.gui.components.StringWidget
• net.minecraft.client.gui.components.Tooltip
• net.minecraft.client.gui.screens.ConfirmScreen
• net.minecraft.client.gui.screens.options.OptionsSubScreen
• net.minecraft.client.gui.screens.social.PlayerSocialManager
• net.minecraft.client.gui.screens.social.PresenceHandler
• net.minecraft.client.server.IntegratedServer
• net.minecraft.commands.Commands
• net.minecraft.commands.Commands.CommandSelection
• net.minecraft.network.Connection
• net.minecraft.network.chat.CommonComponents
• net.minecraft.network.chat.ComponentUtils
• and 31 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

Lightweight mod that automatically publishes singleplayer worlds for online play. Allows your friends to join without always having to remember to enable multiplayer first.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file alwaysmultiplayer-fabric-26.3-1.0.1.jar. The scan reads the mod's classes; it does not run them.