26.1 Snapshot 1 — release journal

What 26.1-snapshot-1 changed for data packs, measured against 1.21.11, the build before it. Released 2025-12-16; development build — not a release.

⚠ Breaking for data packs

This build removed 1 registry. Any file that referenced them stops loading.

Formats

	1.21.11	26.1-snapshot-1
Data pack format	94.1	95.0 moved
Resource pack format	75.0	76.0 moved
Data version	4671	4764

Registries

630 entries added and 43 removed across 13 registries.

Registry	Change	Added	Removed
`experiment/trade_rebalance/enchantment_provider`	registry removed	—	`trades/desert_armorer_boots_4`, `trades/desert_armorer_chestplate_4`, `trades/desert_armorer_chestplate_5`, `trades/desert_armorer_helmet_4`, `trades/desert_armorer_leggings_4`, `trades/desert_armorer_leggings_5`, `trades/jungle_armorer_boots_4`, `trades/jungle_armorer_boots_5`, `trades/jungle_armorer_chestplate_4`, `trades/jungle_armorer_helmet_4`, `trades/jungle_armorer_helmet_5`, `trades/jungle_armorer_leggings_4`, `trades/plains_armorer_boots_4`, `trades/plains_armorer_boots_5`, `trades/plains_armorer_chestplate_4`, `trades/plains_armorer_helmet_4`, `trades/plains_armorer_leggings_4`, `trades/plains_armorer_leggings_5`, `trades/savanna_armorer_boots_4`, `trades/savanna_armorer_chestplate_4`, `trades/savanna_armorer_chestplate_5`, `trades/savanna_armorer_helmet_4`, `trades/savanna_armorer_helmet_5`, `trades/savanna_armorer_leggings_4`, `trades/snow_armorer_boots_4`, `trades/snow_armorer_boots_5`, `trades/snow_armorer_helmet_4`, `trades/snow_armorer_helmet_5`, `trades/swamp_armorer_boots_4`, `trades/swamp_armorer_boots_5`, `trades/swamp_armorer_chestplate_4`, `trades/swamp_armorer_helmet_4`, `trades/swamp_armorer_helmet_5`, `trades/swamp_armorer_leggings_4`, `trades/taiga_armorer_chestplate_5`, `trades/taiga_armorer_leggings_5`
`experiment/trade_rebalance/tag/villager_trade`	new registry	`armorer/level_1`, `armorer/level_2`, `armorer/level_3`, `armorer/level_4`, `armorer/level_5`, `librarian/level_1`, `librarian/level_2`, `librarian/level_3`, `librarian/level_4`, `librarian/level_5`	—
`experiment/trade_rebalance/villager_trade`	new registry	`armorer/1/iron_ingot_emerald`, `armorer/2/emerald_enchanted_chainmail_boots_group_2`, `armorer/2/emerald_enchanted_chainmail_chainmail_group_2`, `armorer/2/emerald_enchanted_chainmail_helmet_group_2`, `armorer/2/emerald_enchanted_chainmail_leggings_group_2`, `armorer/2/emerald_enchanted_iron_boots_group_1`, `armorer/2/emerald_enchanted_iron_chestplate_group_1`, `armorer/2/emerald_enchanted_iron_helmet_group_1`, `armorer/2/emerald_enchanted_iron_leggings_group_1`, `armorer/3/emerald_bell`, `armorer/4/emerald_and_diamond_boots_diamond_leggings_taiga`, `armorer/4/emerald_and_diamond_chestplate_diamond_helmet_taiga`, `armorer/4/emerald_and_diamond_helmet_diamond_boots_taiga`, `armorer/4/emerald_and_diamond_leggings_diamond_chestplate_taiga`, `armorer/4/emerald_enchanted_chainmail_boots_jungle`, `armorer/4/emerald_enchanted_chainmail_boots_swamp`, `armorer/4/emerald_enchanted_chainmail_chestplate_jungle`, `armorer/4/emerald_enchanted_chainmail_chestplate_swamp`, `armorer/4/emerald_enchanted_chainmail_helmet_jungle`, `armorer/4/emerald_enchanted_chainmail_helmet_swamp`, `armorer/4/emerald_enchanted_chainmail_leggings_jungle`, `armorer/4/emerald_enchanted_chainmail_leggings_swamp`, `armorer/4/emerald_enchanted_iron_boots_desert`, `armorer/4/emerald_enchanted_iron_boots_plains`, `armorer/4/emerald_enchanted_iron_boots_savanna`, `armorer/4/emerald_enchanted_iron_boots_snow`, `armorer/4/emerald_enchanted_iron_chestplate_desert`, `armorer/4/emerald_enchanted_iron_chestplate_plains`, `armorer/4/emerald_enchanted_iron_chestplate_savanna`, `armorer/4/emerald_enchanted_iron_helmet_desert`, `armorer/4/emerald_enchanted_iron_helmet_plains`, `armorer/4/emerald_enchanted_iron_helmet_savanna`, `armorer/4/emerald_enchanted_iron_helmet_snow`, `armorer/4/emerald_enchanted_iron_leggings_desert`, `armorer/4/emerald_enchanted_iron_leggings_plains`, `armorer/4/emerald_enchanted_iron_leggings_savanna`, `armorer/5/diamond_block_emerald_taiga`, `armorer/5/emerald_and_diamond_diamond_boots_plains`, `armorer/5/emerald_and_diamond_diamond_boots_snow`, `armorer/5/emerald_and_diamond_diamond_chestplate_desert`, `armorer/5/emerald_and_diamond_diamond_chestplate_savanna`, `armorer/5/emerald_and_diamond_diamond_chestplate_taiga`, `armorer/5/emerald_and_diamond_diamond_helmet_savanna`, `armorer/5/emerald_and_diamond_diamond_helmet_snow`, `armorer/5/emerald_and_diamond_diamond_leggings_desert`, `armorer/5/emerald_and_diamond_diamond_leggings_plains`, `armorer/5/emerald_and_diamond_diamond_leggings_taiga`, `armorer/5/emerald_chainmail_boots_jungle`, `armorer/5/emerald_chainmail_boots_swamp`, `armorer/5/emerald_chainmail_helmet_jungle`, `armorer/5/emerald_chainmail_helmet_swamp`, `armorer/5/iron_block_emerald_non_taiga`, `librarian/1/emerald_and_book_desert_enchanted_book`, `librarian/1/emerald_and_book_jungle_enchanted_book`, `librarian/1/emerald_and_book_plains_enchanted_book`, `librarian/1/emerald_and_book_savanna_enchanted_book`, `librarian/1/emerald_and_book_snow_enchanted_book`, `librarian/1/emerald_and_book_swamp_enchanted_book`, `librarian/1/emerald_and_book_taiga_enchanted_book`, `librarian/2/book_emerald` and 28 more	—
`tag/potion`	new registry	`tradeable`	—
`tag/villager_trade`	new registry	`armorer/level_1`, `armorer/level_2`, `armorer/level_3`, `armorer/level_4`, `armorer/level_5`, `butcher/level_1`, `butcher/level_2`, `butcher/level_3`, `butcher/level_4`, `butcher/level_5`, `cartographer/level_1`, `cartographer/level_2`, `cartographer/level_3`, `cartographer/level_4`, `cartographer/level_5`, `cleric/level_1`, `cleric/level_2`, `cleric/level_3`, `cleric/level_4`, `cleric/level_5`, `common_smith/level_1`, `common_smith/level_2`, `common_smith/level_3`, `common_smith/level_4`, `common_smith/level_5`, `farmer/level_1`, `farmer/level_2`, `farmer/level_3`, `farmer/level_4`, `farmer/level_5`, `fisherman/level_1`, `fisherman/level_2`, `fisherman/level_3`, `fisherman/level_4`, `fisherman/level_5`, `fletcher/level_1`, `fletcher/level_2`, `fletcher/level_3`, `fletcher/level_4`, `fletcher/level_5`, `leatherworker/level_1`, `leatherworker/level_2`, `leatherworker/level_3`, `leatherworker/level_4`, `leatherworker/level_5`, `librarian/level_1`, `librarian/level_2`, `librarian/level_3`, `librarian/level_4`, `librarian/level_5`, `mason/level_1`, `mason/level_2`, `mason/level_3`, `mason/level_4`, `mason/level_5`, `shepherd/level_1`, `shepherd/level_2`, `shepherd/level_3`, `shepherd/level_4`, `shepherd/level_5` and 13 more	—
`trade_set`	new registry	`armorer/level_1`, `armorer/level_2`, `armorer/level_3`, `armorer/level_4`, `armorer/level_5`, `butcher/level_1`, `butcher/level_2`, `butcher/level_3`, `butcher/level_4`, `butcher/level_5`, `cartographer/level_1`, `cartographer/level_2`, `cartographer/level_3`, `cartographer/level_4`, `cartographer/level_5`, `cleric/level_1`, `cleric/level_2`, `cleric/level_3`, `cleric/level_4`, `cleric/level_5`, `farmer/level_1`, `farmer/level_2`, `farmer/level_3`, `farmer/level_4`, `farmer/level_5`, `fisherman/level_1`, `fisherman/level_2`, `fisherman/level_3`, `fisherman/level_4`, `fisherman/level_5`, `fletcher/level_1`, `fletcher/level_2`, `fletcher/level_3`, `fletcher/level_4`, `fletcher/level_5`, `leatherworker/level_1`, `leatherworker/level_2`, `leatherworker/level_3`, `leatherworker/level_4`, `leatherworker/level_5`, `librarian/level_1`, `librarian/level_2`, `librarian/level_3`, `librarian/level_4`, `librarian/level_5`, `mason/level_1`, `mason/level_2`, `mason/level_3`, `mason/level_4`, `mason/level_5`, `shepherd/level_1`, `shepherd/level_2`, `shepherd/level_3`, `shepherd/level_4`, `shepherd/level_5`, `toolsmith/level_1`, `toolsmith/level_2`, `toolsmith/level_3`, `toolsmith/level_4`, `toolsmith/level_5` and 8 more	—
`villager_trade`	new registry	`armorer/1/emerald_iron_boots`, `armorer/1/emerald_iron_chestplate`, `armorer/1/emerald_iron_helmet`, `armorer/1/emerald_iron_leggings`, `armorer/2/emerald_chainmail_boots`, `armorer/2/emerald_chainmail_leggings`, `armorer/3/emerald_chainmail_chestplate`, `armorer/3/emerald_chainmail_helmet`, `armorer/3/emerald_shield`, `armorer/3/lava_bucket_emerald`, `armorer/4/emerald_enchanted_diamond_boots`, `armorer/4/emerald_enchanted_diamond_leggings`, `armorer/5/emerald_enchanted_diamond_chestplate`, `armorer/5/emerald_enchanted_diamond_helmet`, `butcher/1/chicken_emerald`, `butcher/1/emerald_rabbit_stew`, `butcher/1/porkchop_emerald`, `butcher/1/rabbit_emerald`, `butcher/2/coal_emerald`, `butcher/2/emerald_cooked_chicken`, `butcher/2/emerald_cooked_porkchop`, `butcher/3/beef_emerald`, `butcher/3/mutton_emerald`, `butcher/4/dried_kelp_block_emerald`, `butcher/5/sweet_berries_emerald`, `cartographer/1/emerald_map`, `cartographer/1/paper_emerald`, `cartographer/2/emerald_and_compass_explorer_jungle_map`, `cartographer/2/emerald_and_compass_explorer_swamp_map`, `cartographer/2/emerald_and_compass_village_desert_map`, `cartographer/2/emerald_and_compass_village_plains_map`, `cartographer/2/emerald_and_compass_village_savanna_map`, `cartographer/2/emerald_and_compass_village_snowy_map`, `cartographer/2/emerald_and_compass_village_taiga_map`, `cartographer/2/glass_pane_emerald`, `cartographer/3/compass_emerald`, `cartographer/3/emerald_and_compass_ocean_explorer_map`, `cartographer/3/emerald_and_compass_trial_chamber_map`, `cartographer/4/emerald_black_banner`, `cartographer/4/emerald_blue_banner`, `cartographer/4/emerald_brown_banner`, `cartographer/4/emerald_cyan_banner`, `cartographer/4/emerald_gray_banner`, `cartographer/4/emerald_green_banner`, `cartographer/4/emerald_item_frame`, `cartographer/4/emerald_light_blue_banner`, `cartographer/4/emerald_lime_banner`, `cartographer/4/emerald_magenta_banner`, `cartographer/4/emerald_orange_banner`, `cartographer/4/emerald_pink_banner`, `cartographer/4/emerald_purple_banner`, `cartographer/4/emerald_red_banner`, `cartographer/4/emerald_white_banner`, `cartographer/4/emerald_yellow_banner`, `cartographer/5/emerald_and_compass_woodland_mansion_map`, `cartographer/5/emerald_globe_banner_pattern`, `cleric/1/emerald_redstone`, `cleric/1/rotten_flesh_emerald`, `cleric/2/emerald_lapis_lazuli`, `cleric/2/gold_ingot_emerald` and 322 more	—
`data_component_predicate_type`	changed	`villager/variant`	—
`data_component_type`	changed	`additional_trade_cost`	—
`environment_attribute`	changed	`visual/ambient_light_color`, `visual/block_light_tint`, `visual/night_vision_color`	—
`experiment/trade_rebalance/tag/enchantment`	changed	—	`trades/desert_special`, `trades/jungle_special`, `trades/plains_special`, `trades/savanna_special`, `trades/snow_special`, `trades/swamp_special`, `trades/taiga_special`
`loot_function_type`	changed	`set_random_dyes`, `set_random_potion`	—
`loot_number_provider_type`	changed	`sum`	—

The official notes

Read the 26.1 Snapshot 1 article on minecraft.net.

That article's technical changes are grouped under these headings — open it for the detail:

Data Pack Version 95
Data-driven Villager Trades
Commands
Environment Attributes
Data Components
Loot Functions
Predicates
Enchantments
Tags
Resource Pack Version 76
Lightmap Shader Changes

Minecraft Wiki page for 26.1-snapshot-1.

In the journal

← 1.21.11 · All builds · 26.1-snapshot-2 →

Sources

misode/mcmeta — 26.1-snapshot-1 summary — formats and registries, generated from the game’s own data.
minecraft.net — 26.1 Snapshot 1 — section names only.