Capet SLS Addition

Evidence

Ran on Kiln's test stand (2026-11-04): ServerMain did not start: java.lang.NoSuchMethodError: 'java.util.Optional net.fabricmc.loader.api.FabricLoader.getModContainer(java.lang.String)'; BoardClient did not start: java.lang.NoClassDefFoundError: net/minecraft/network/protocol/common/custom/CustomPacketPayload.

What it needs from Kiln

• an access widener
• Mixin
• com.mojang.authlib.GameProfile
• net.fabricmc.fabric.api.client.command.v2.ClientCommandRegistrationCallback
• net.fabricmc.fabric.api.client.command.v2.ClientCommands
• net.fabricmc.fabric.api.client.command.v2.FabricClientCommandSource
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayNetworking
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents
• net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents.ServerStarted
• net.fabricmc.fabric.api.networking.v1.PayloadTypeRegistry
• 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.SharedSuggestionProvider
• net.minecraft.commands.arguments.DimensionArgument
• net.minecraft.commands.arguments.GameModeArgument
• net.minecraft.commands.arguments.coordinates.Coordinates
• net.minecraft.commands.arguments.coordinates.RotationArgument
• net.minecraft.commands.arguments.coordinates.Vec3Argument
• net.minecraft.core.UUIDUtil
• net.minecraft.network.chat.Style
• net.minecraft.network.codec.ByteBufCodecs
• net.minecraft.network.codec.StreamCodec
• net.minecraft.network.protocol.Packet
• net.minecraft.network.protocol.PacketFlow
• 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.network.protocol.game.ClientboundEntityPositionSyncPacket
• net.minecraft.network.protocol.game.ClientboundPlayerInfoUpdatePacket
• net.minecraft.network.protocol.game.ClientboundPlayerInfoUpdatePacket.Action
• net.minecraft.network.protocol.game.ClientboundRotateHeadPacket
• net.minecraft.network.protocol.game.ClientboundSetDisplayObjectivePacket
• net.minecraft.network.protocol.game.ClientboundSetObjectivePacket
• net.minecraft.network.protocol.game.ClientboundSetScorePacket
• net.minecraft.network.syncher.SynchedEntityData
• net.minecraft.server.MinecraftServer
• net.minecraft.server.ServerScoreboard
• and 40 more

On the roadmap: Minecraft's libraries and client API (0.2), Code next to data (0.3), Machines (0.4), Mixin (0.5)

In the author's words

Carpet extension made by StarLight Server

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file CarpetSLSAddition-0.25.1.jar. The scan reads the mod's classes; it does not run them.