Write and debug Minecraft Java 26.x and 1.21.x commands, selectors, execute chains, scoreboards, NBT, and RCON scripts. Use for command-only work; use minecraft-datapack for complete datapack structures.
Create, modify, and debug server plugins for current Paper 26.x on Java 25 or legacy Bukkit-derived 1.21.x servers on Java 21. Use for JavaPlugin APIs, events, commands, schedulers, configuration, PDC, and Adventure, not client mods or vanilla datapacks.
Create and debug Minecraft 26.x and 1.21.x world generation for datapacks, NeoForge, or Fabric, including biomes, dimensions, features, structures, and biome modifiers. Use for worldgen data or registration, not general gameplay systems.