RegionCast

Evidence

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

What it needs from Kiln

• com.mojang.authlib.GameProfile
• com.mojang.blaze3d.platform.NativeImage
• net.fabricmc.fabric.api.client.event.lifecycle.v1.ClientChunkEvents
• net.fabricmc.fabric.api.client.event.lifecycle.v1.ClientChunkEvents.Load
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayConnectionEvents
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayConnectionEvents.Disconnect
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayNetworking
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayNetworking.Context
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayNetworking.PlayPayloadHandler
• 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.EndTick
• 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.minecraft.client.Options
• net.minecraft.client.gui.components.Button
• net.minecraft.client.gui.components.Button.Builder
• net.minecraft.client.gui.components.Button.OnPress
• net.minecraft.client.gui.screens.ConfirmScreen
• net.minecraft.client.input.MouseButtonEvent
• net.minecraft.client.multiplayer.ServerData
• net.minecraft.client.renderer.RenderPipelines
• net.minecraft.client.renderer.texture.DynamicTexture
• net.minecraft.client.renderer.texture.TextureManager
• net.minecraft.client.server.IntegratedServer
• net.minecraft.commands.CommandSourceStack
• net.minecraft.commands.Commands
• net.minecraft.commands.Commands.CommandSelection
• net.minecraft.core.BlockPos.MutableBlockPos
• net.minecraft.network.FriendlyByteBuf
• 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.permissions.PermissionCheck
• and 44 more

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

In the author's words

Pull region files from another server's world into this one, picked off a map. Shows which regions changed since the last copy, and the last few updates stay undoable.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file regioncast-1.0.2+26.3.jar. The scan reads the mod's classes; it does not run them.