Minecraft 25w04a

25w04a came out on January 22, 2025, as the third 1.21.5 snapshot. There is very little in it you would notice in survival, but data pack authors got a lot. Several behaviors that used to belong to one specific item are now item components that any item can have.

With blocks_attacks, an item can block attacks the way a shield does, with settings for how long you have to hold it before it blocks and how much damage it stops. provides_banner_patterns lets an item go in the pattern slot of a loom, provides_trim_material sets which trim material an item gives in a trimming recipe, and break_sound sets the sound an item makes when its durability runs out. tooltip_display replaced the hide_tooltip and hide_additional_tooltip components and the old show_in_tooltip fields, so hiding parts of a tooltip now happens in one place.

Cat and frog variants became data-driven, and every variant with spawn rules now uses the same system to decide where it appears. The potion entity was split into separate splash_potion and lingering_potion types. SNBT now accepts lists that mix different value types, while the NBT format itself stays the same.

A few changes are visible in game. A crossbow's tooltip lists every charged projectile instead of only the first, a filled map without a map ID no longer shows "Unknown Map", and Kyrgyz was added as a language. Data pack format 64, resource pack format 49, 47 bugs fixed.