CustomContentEngine
About
A Paper *.21.x custom-content engine for creating original custom items, blocks, furniture, and resource packs from YAML definitions. It supports CustomModelData, names, lore, enchantments, attributes, durability, placeable blocks, furniture rotation, seats, collision, persistence, generated models, ZIP resource-pack export, conflict detection, GUI browsing with pagination and search, reload and administration commands, a public Java API, custom events, and compatibility hooks for common server plugins.