minecraft-blocks-itemslisted

# Minecraft Blocks and Items ## Purpose Blocks and items are the first thing every mod adds and the first place the loader/version/mappings triple bites. A block is not one object: it is a registered `Block`, usually a registered `BlockItem`, a blockstate JSON, one or more model JSONs, textures, a translation key, a creative tab insertion, and often loot and recipe data. Miss any link in that chain and you get silent failure — an invisible block, a purple-and-black model, or an item that exists but cannot be obtained. This skill covers the whole chain on each loader separately. ## When to use - Adding a block, an item, a block with a block entity, or a block with states. - A block or item is registered but does not appear in the creative menu. - The model renders as the missing-texture checkerboard, or the item shows as a purple-and-black square in the hand. - The name shows as `block.examplemod.ruby_block` instead of "Ruby Block". - Migrating item NBT code to data components after a 1.20.5+ version bump. - A block entity does not save its contents across a world reload. ## When NOT to use - The loader, Minecraft version and mappings are unresolved. Run `minecraft-project-conventions` first. - The question is *where* registration classes live and when they run. That is `minecraft-mod-architecture`. - The block opens a GUI — the menu and screen half is `minecraft-gui-screens`. - Custom block rendering beyond the JSON model system (block entity renderers, render l