beyondheights

Evidence

Server-side mod: Kiln runs mods' code on Horizon's single-player server, not on dedicated servers.

What it needs from Kiln

• Mixin
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayConnectionEvents
• net.fabricmc.fabric.api.client.networking.v1.ClientPlayConnectionEvents.Join
• net.fabricmc.fabric.api.client.screen.v1.ScreenEvents
• net.fabricmc.fabric.api.client.screen.v1.ScreenEvents.AfterInit
• net.fabricmc.fabric.api.client.screen.v1.Screens
• net.minecraft.client.gui.components.AbstractWidget
• net.minecraft.client.gui.components.events.ContainerEventHandler
• net.minecraft.client.gui.components.events.GuiEventListener
• net.minecraft.client.gui.screens.worldselection.SelectWorldScreen
• net.minecraft.client.gui.screens.worldselection.WorldSelectionList
• net.minecraft.client.gui.screens.worldselection.WorldSelectionList.Entry
• net.minecraft.client.renderer.RenderPipelines
• net.minecraft.client.resources.language.I18n
• net.minecraft.core.RegistryAccess
• net.minecraft.server.packs.FilePackResources
• net.minecraft.server.packs.FilePackResources.FileResourcesSupplier
• net.minecraft.server.packs.PackLocationInfo
• net.minecraft.server.packs.PackSelectionConfig
• net.minecraft.server.packs.PackType
• net.minecraft.server.packs.repository.Pack
• net.minecraft.server.packs.repository.Pack.Position
• net.minecraft.server.packs.repository.Pack.ResourcesSupplier
• net.minecraft.server.packs.repository.PackSource
• net.minecraft.server.packs.repository.RepositorySource
• net.minecraft.world.attribute.EnvironmentAttributeMap
• net.minecraft.world.attribute.EnvironmentAttributes
• net.minecraft.world.level.dimension.DimensionDefaults
• net.minecraft.world.level.dimension.DimensionType
• net.minecraft.world.level.storage.LevelStorageSource
• net.minecraft.world.level.storage.LevelSummary
• Minecraft.getLevelSource()
• GuiGraphicsExtractor.blit()
• ClientLevel.registryAccess()
• Registry.get()
• Registries.DIMENSION_TYPE

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

Expand the upper and lower limits of world height without loading terrain.

Scan

Scanned on 4 November 2026 against Kiln 0.2.0, file beyondheights-26.3-fabric-1.3.0.jar. The scan reads the mod's classes; it does not run them.