Modern Player Ladder

Evidence

Ran on Kiln's test stand (2026-11-04): ModernPlayerLadder did not start: java.lang.NoClassDefFoundError: net/fabricmc/fabric/api/attachment/v1/AttachmentRegistry$Builder.

What it needs from Kiln

• Mixin
• net.fabricmc.fabric.api.attachment.v1.AttachmentRegistry
• net.fabricmc.fabric.api.attachment.v1.AttachmentRegistry.Builder
• net.fabricmc.fabric.api.command.v2.CommandRegistrationCallback
• net.fabricmc.fabric.api.entity.event.v1.ServerPlayerEvents.Leave
• net.fabricmc.fabric.api.event.player.UseEntityCallback
• net.fabricmc.fabric.api.tag.convention.v2.TagUtil
• net.minecraft.commands.CommandSourceStack
• net.minecraft.commands.Commands
• net.minecraft.commands.Commands.CommandSelection
• net.minecraft.network.protocol.game.ClientboundSetPassengersPacket
• net.minecraft.server.network.ServerGamePacketListenerImpl
• net.minecraft.tags.TagKey
• net.minecraft.world.entity.EntityType
• ServerPlayerEvents.LEAVE
• DefaultedRegistry.getOptional()
• BuiltInRegistries.ENTITY_TYPE
• Registries.ENTITY_TYPE
• Identifier.tryParse()
• ServerPlayer.connection
• ServerPlayer.getFirstPassenger()
• ServerPlayer.getPassengers()
• ServerPlayer.getVehicle()
• ServerPlayer.isCrouching()
• ServerPlayer.isPassenger()
• ServerPlayer.isVehicle()
• ServerPlayer.onGround()
• ServerPlayer.stopRiding()
• Entity.getFirstPassenger()
• Entity.getType()
• Entity.getVehicle()
• Entity.isVehicle()
• Entity.startRiding()
• Entity.stopRiding()
• Player.getAttachedOrElse()
• Player.setAttached()
• Player.startRiding()

On the roadmap: Code next to data (0.3), Mixin (0.5)

In the author's words

Ride your friend(s) - with consent. Player Ladder mod inspired from ForwarD-NerN

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file modern-player-ladder-2.0.0.jar. The scan reads the mod's classes; it does not run them.