SerendiModGuarder

Evidence

Ran on Kiln's test stand (2026-11-04): SerendiModGuarderMod did not start: java.lang.NoClassDefFoundError: net/minecraft/server/MinecraftServer; SerendiModGuarderClient did not start: java.lang.NoClassDefFoundError: net/minecraft/network/protocol/common/custom/CustomPacketPayload.

What it needs from Kiln

• Mixin
• net.fabricmc.fabric.api.client.networking.v1.ClientLoginNetworking
• net.fabricmc.fabric.api.client.networking.v1.ClientLoginNetworking.LoginQueryRequestHandler
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayConnectionEvents
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayConnectionEvents.Join
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayNetworking
• 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.event.lifecycle.v1.ServerTickEvents
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents.StartTick
• net.fabricmc.fabric.api.networking.v1.FriendlyByteBufs
• net.fabricmc.fabric.api.networking.v1.LoginPacketSender
• net.fabricmc.fabric.api.networking.v1.PacketSender
• net.fabricmc.fabric.api.networking.v1.PayloadTypeRegistry
• 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.LoginQueryResponseHandler
• net.fabricmc.fabric.api.networking.v1.ServerLoginNetworking.LoginSynchronizer
• net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents
• net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents.Disconnect
• net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents.Join
• net.fabricmc.fabric.api.networking.v1.ServerPlayNetworking
• net.fabricmc.fabric.api.networking.v1.ServerPlayNetworking.Context
• net.fabricmc.fabric.api.networking.v1.ServerPlayNetworking.PlayPayloadHandler
• net.fabricmc.loader.api.ModContainer
• net.fabricmc.loader.api.metadata.ModMetadata
• net.minecraft.commands.CommandSourceStack
• net.minecraft.commands.Commands
• net.minecraft.commands.Commands.CommandSelection
• net.minecraft.network.FriendlyByteBuf
• net.minecraft.network.codec.StreamCodec
• net.minecraft.network.protocol.common.custom.CustomPacketPayload
• net.minecraft.network.protocol.common.custom.CustomPacketPayload.Type
• net.minecraft.network.protocol.common.custom.CustomPacketPayload.TypeAndCodec
• net.minecraft.server.MinecraftServer
• net.minecraft.server.network.ServerGamePacketListenerImpl
• net.minecraft.server.network.ServerLoginPacketListenerImpl
• net.minecraft.server.players.PlayerList
• and 4 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

A Fabric Mod, used to detect and block players who use unauthorized client mods. [Both the server and the client must install this Mod.]

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file SerendiModGuarder-1.5.3.jar. The scan reads the mod's classes; it does not run them.