Packs and scripting

Behavior packs

Put packs in behavior_packs/, as folders with a manifest.json or as .mcpack, .mcaddon or .zip archives. Archives are extracted to behavior_packs/.cache/, which is rebuilt at each start. Add-ons in resource_packs/ are scanned too. A duplicate UUID is skipped, and so is a pack with a missing dependency.

Custom items

A pack with an items/ folder adds items. The server reads these components:

minecraft:display_name, minecraft:icon, minecraft:max_stack_size, minecraft:durability, minecraft:food, minecraft:digger, minecraft:cooldown, minecraft:projectile, minecraft:custom_components.

Custom blocks

A pack with a blocks/ folder adds blocks. The server reads these components:

minecraft:collision_box, minecraft:selection_box, minecraft:destructible_by_mining, minecraft:destructible_by_explosion, minecraft:friction, minecraft:geometry, minecraft:light_dampening, minecraft:light_emission, minecraft:map_color, minecraft:material_instances.

Recipes and entities

CustomContentRegistry also reads minecraft:recipe_shaped, minecraft:recipe_shapeless and minecraft:entity definitions with is_spawnable and is_summonable.