25w04a — release journal
What 25w04a changed for data packs, measured against 25w03a, the build before it. Released 2025-01-22; development build — not a release.
⚠ Breaking for data packs
This build removed 2 registries. Any file that referenced them stops loading. item_sub_predicate_type looks renamed to data_component_predicate_type (100% of its entries reappear there) — in those cases the fix is likely moving files, not rewriting them.
Formats
| 25w03a | 25w04a | |
|---|---|---|
| Data pack format | 63.0 | 64.0 moved |
| Resource pack format | 48.0 | 49.0 moved |
| Data version | 4304 | 4308 |
Registries
30 entries added and 22 removed across 11 registries.
| Registry | Change | Added | Removed |
|---|---|---|---|
item_sub_predicate_type | registry removed — likely renamed to data_component_predicate_type | — | attribute_modifiers, bundle_contents, container, custom_data, damage, enchantments, firework_explosion, fireworks, jukebox_playable, potion_contents, stored_enchantments, trim, writable_book_content, written_book_content |
tag/cat_variant | registry removed | — | default_spawns, full_moon_spawns |
data_component_predicate_type | new registry | attribute_modifiers, bundle_contents, container, custom_data, damage, enchantments, firework_explosion, fireworks, jukebox_playable, potion_contents, stored_enchantments, trim, writable_book_content, written_book_content | — |
spawn_condition_type | new registry | biome, moon_brightness, structure | — |
block_type | changed | tinted_particle_leaves, untinted_particle_leaves | leaves |
data_component_type | changed | blocks_attacks, break_sound, provides_banner_patterns, provides_trim_material, tooltip_display | hide_additional_tooltip, hide_tooltip |
entity_type | changed | lingering_potion, splash_potion | potion |
lang | changed | ky_kg | — |
tag/damage_type | changed | bypasses_blocking | bypasses_shield |
tag/entity_type | changed | can_wear_horse_armor | — |
test_environment_definition_type | changed | weather | raining |
The official notes
Read the 25w04a article on minecraft.net.
That article's technical changes are grouped under these headings — open it for the detail:
- Data Pack Versions 64
- Commands
- SNBT changes
- Tags
- Uniform variant selection
- Wolf Variants
- Pig Variants
- Cat variants
- Frog variants
- Item Components
- Particles
- Recipes
- Trim Patterns and Trim Materials
- Loot Functions
- Resource Pack Version 49
- Item Models
- Atlas
Minecraft Wiki page for 25w04a.
In the journal
← 25w03a · All builds · 25w05a →
Sources
- misode/mcmeta — 25w04a summary — formats and registries, generated from the game’s own data.
- minecraft.net — 25w04a — section names only.