25w35a — release journal

What 25w35a changed for data packs, measured against 25w34b, the build before it. Released 2025-08-26; development build — not a release.

⚠ Entries removed

17 registry entries were removed. A pack that names one of them will fail to parse where it does.

Formats

	25w34b	25w35a
Data pack format	84.0	85.0 moved
Resource pack format	66.0	67.0 moved
Data version	4540	4542

Registries

117 entries added and 17 removed across 15 registries.

Registry	Change	Added	Removed
`incoming_rpc_methods`	new registry	`allowlist`, `allowlist/add`, `allowlist/clear`, `allowlist/remove`, `allowlist/set`, `bans`, `bans/add`, `bans/clear`, `bans/remove`, `bans/set`, `gamerules`, `gamerules/update`, `ip_bans`, `ip_bans/add`, `ip_bans/clear`, `ip_bans/remove`, `ip_bans/set`, `operators`, `operators/add`, `operators/clear`, `operators/remove`, `operators/set`, `players`, `players/kick`, `rpc.discover`, `server/save`, `server/status`, `server/stop`, `server/system_message`, `serversettings/accept_transfers`, `serversettings/accept_transfers/set`, `serversettings/allow_flight`, `serversettings/allow_flight/set`, `serversettings/autosave`, `serversettings/autosave/set`, `serversettings/difficulty`, `serversettings/difficulty/set`, `serversettings/enforce_allowlist`, `serversettings/enforce_allowlist/set`, `serversettings/entity_broadcast_range`, `serversettings/entity_broadcast_range/set`, `serversettings/force_game_mode`, `serversettings/force_game_mode/set`, `serversettings/game_mode`, `serversettings/game_mode/set`, `serversettings/hide_online_players`, `serversettings/hide_online_players/set`, `serversettings/max_players`, `serversettings/max_players/set`, `serversettings/motd`, `serversettings/motd/set`, `serversettings/operator_user_permission_level`, `serversettings/operator_user_permission_level/set`, `serversettings/pause_when_empty_seconds`, `serversettings/pause_when_empty_seconds/set`, `serversettings/player_idle_timeout`, `serversettings/player_idle_timeout/set`, `serversettings/simulation_distance`, `serversettings/simulation_distance/set`, `serversettings/spawn_protection_radius` and 9 more	—
`outgoing_rpc_methods`	new registry	`notification:allowlist/added`, `notification:allowlist/removed`, `notification:bans/added`, `notification:bans/removed`, `notification:gamerules/updated`, `notification:ip_bans/added`, `notification:ip_bans/removed`, `notification:operators/added`, `notification:operators/removed`, `notification:players/joined`, `notification:players/left`, `notification:server/saved`, `notification:server/saving`, `notification:server/started`, `notification:server/status`, `notification:server/stopping`	—
`advancement`	changed	`recipes/decorations/iron_chain`	`recipes/decorations/chain`
`block`	changed	`iron_chain`	`chain`
`block_definition`	changed	`iron_chain`	`chain`
`item`	changed	`iron_chain`	`chain`
`item_definition`	changed	`iron_chain`	`chain`
`lang`	changed	`hal_ua`	—
`loot_table`	changed	`blocks/iron_chain`	`blocks/chain`
`memory_module_type`	changed	`unreachable_transport_block_positions`	—
`model`	changed	`block/iron_chain`, `item/iron_chain`	`block/chain`, `item/chain`
`recipe`	changed	`iron_chain`	`chain`
`sound`	changed	`block/copper_chest/copper_chest_close1`, `block/copper_chest/copper_chest_close2`, `block/copper_chest/copper_chest_close3`, `block/copper_chest/copper_chest_open1`, `block/copper_chest/copper_chest_open2`, `block/copper_chest/copper_chest_open3`, `block/copper_chest/copper_chest_oxidized_close1`, `block/copper_chest/copper_chest_oxidized_close2`, `block/copper_chest/copper_chest_oxidized_close3`, `block/copper_chest/copper_chest_oxidized_open1`, `block/copper_chest/copper_chest_oxidized_open2`, `block/copper_chest/copper_chest_oxidized_open3`, `block/copper_chest/copper_chest_weathered_close1`, `block/copper_chest/copper_chest_weathered_close2`, `block/copper_chest/copper_chest_weathered_close3`, `block/copper_chest/copper_chest_weathered_open1`, `block/copper_chest/copper_chest_weathered_open2`, `block/copper_chest/copper_chest_weathered_open3`	`block/copper_chest/copper_chest_close`, `block/copper_chest/copper_chest_open`, `block/copper_chest/copper_chest_oxidized_close`, `block/copper_chest/copper_chest_oxidized_open`, `block/copper_chest/copper_chest_weathered_close`, `block/copper_chest/copper_chest_weathered_open`
`sound_event`	changed	`block.shelf.take_item`	—
`texture`	changed	`block/iron_chain`, `item/iron_chain`	`block/chain`, `item/chain`

The official notes

Read the 25w35a article on minecraft.net.

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

Server Properties
Minecraft Server Management Protocol
Data Pack Version 85.0
Game Rules
Text rendering
Resource Pack Version 67.0
Block Sprites
Item Sprites

Minecraft Wiki page for 25w35a.

In the journal

← 25w34b · All builds · 25w36a →

Sources

misode/mcmeta — 25w35a summary — formats and registries, generated from the game’s own data.
minecraft.net — 25w35a — section names only.