Structure Pool API

Calls something that is on Kiln's roadmap. Parts of it may already run.

Evidence

Ran on Kiln's test stand (2026-11-04): FabricMod did not start: java.lang.NoClassDefFoundError: net/fabricmc/fabric/api/event/lifecycle/v1/ServerLifecycleEvents.

What it needs from Kiln

Mixin
net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents
net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents.ServerStarting
net.minecraft.core.RegistryAccess
net.minecraft.core.RegistryAccess.Frozen
net.minecraft.server.MinecraftServer
net.minecraft.world.level.levelgen.structure.pools.SinglePoolElement
net.minecraft.world.level.levelgen.structure.pools.StructurePoolElement
net.minecraft.world.level.levelgen.structure.pools.StructureTemplatePool
net.minecraft.world.level.levelgen.structure.pools.StructureTemplatePool.Projection
Registry.getOptional()
Registry.getOrThrow()
Registries.PROCESSOR_LIST
Registries.TEMPLATE_POOL

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

In the author's words

📚 API to inject structures into structure pools.

Scan

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

Reports from players

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