scafall

Scafall wraps Minecraft classes so that an API can accept and return platform-neutral objects. A developer writes an API against the wrappers, and each implementation unwraps the arguments into the native Minecraft object it works with, such as an ItemStack, then wraps the return value. Objects from other platforms, such as an org.bukkit.inventory.ItemStack from Paper or Spigot, are converted to native Minecraft types first, so the native type is always the ground truth.

The main goal is a minimal wrapping solution for building cross-platform APIs that other mods and plugins can share. The secondary goal is a set of utilities for the parts most often needed across platforms, including tasks, scheduling, Kotlin-specific helpers and convenience tools for libraries such as Adventure. Scafall also includes a reactive interface toolkit that draws on Compose Runtime.

Scafall requires Fabric API and Fabric Language Kotlin. It is published for Fabric only, for game versions 26.1.2 and 26.2, with 1.0-alpha.2.0-fabric for 26.2 as the latest file, released under the MIT License and open source. It is also available on the Paper, Spigot, Bukkit and Purpur server platforms. The environment is not stated on the Modrinth page, so the card does not say where it runs.