Discord Viper

Evidence

Ran on Kiln's test stand (2026-11-04): ViperBridge did not start: java.lang.NoClassDefFoundError: net/fabricmc/fabric/api/event/lifecycle/v1/ServerLifecycleEvents.

What it needs from Kiln

• Mixin
• 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.ServerStopping
• net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents
• net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents.Disconnect
• net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents.Join
• net.minecraft.commands.CommandSourceStack
• net.minecraft.commands.Commands
• net.minecraft.commands.Commands.CommandSelection
• net.minecraft.nbt.CompoundTag
• net.minecraft.nbt.ListTag
• net.minecraft.server.MinecraftServer
• net.minecraft.server.level.ServerPlayerGameMode
• net.minecraft.server.network.ServerGamePacketListenerImpl
• net.minecraft.server.players.NameAndId
• net.minecraft.server.players.PlayerList
• net.minecraft.server.players.UserBanList
• net.minecraft.server.players.UserBanListEntry
• net.minecraft.server.players.UserWhiteList
• net.minecraft.server.players.UserWhiteListEntry
• net.minecraft.world.entity.player.Inventory
• net.minecraft.world.food.FoodData
• net.minecraft.world.level.GameType
• net.minecraft.world.level.storage.LevelResource
• net.minecraft.world.scores.PlayerTeam
• net.minecraft.world.scores.Scoreboard
• org.apache.logging.log4j.LogManager
• org.apache.logging.log4j.core.LogEvent
• org.apache.logging.log4j.core.Logger
• org.apache.logging.log4j.core.appender.AbstractAppender
• org.apache.logging.log4j.core.config.Property
• org.apache.logging.log4j.message.Message
• ServerLevel.getSeed()
• ServerPlayer.connection
• ServerPlayer.createCommandSourceStack()
• ServerPlayer.experienceLevel
• ServerPlayer.gameMode
• ServerPlayer.getDisplayName()
• ServerPlayer.getFoodData()
• and 2 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

ViperBridge is a high-performance, server-side only gateway bridging Minecraft, Discord, and REST APIs. Chat relay, Discord moderation commands, player info queries, and full server control with no client mods required.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file discord-viper-2.1.0.jar. The scan reads the mod's classes; it does not run them.