Minecraft:Java Edition 25w34a

Template:Infobox version

25w34a (titled Snapshot 25w34a in-game) is the fourth Minecraft:snapshot for Minecraft:Java Edition 1.21.9, released on August 19, 2025.<ref>Template:Snap</ref>

Additions

Command format

Template:Cmd

New command that fetches the contents of a player profile from Minecraft servers.
Since the operation might take some time, it works asynchronously.
- Results will be printed only when operation finishes, but the game will keep running unpaused.
After successful completion, a message will be printed that lets users copy the contents of a fully resolved Template:Cd component or Template:Cmd with said component.
Since the result is not known at the time of execution, this command always returns Template:Cd.
Syntax:
- Template:Cmd: resolves profile by username (case-insensitive).
- Template:Cmd: resolves profile by UUID.

General

Screenshot of Minecraft: Java Edition 25w34a. There is a dialog with the caption "Server Code of Conduct". The conduct here is an example, in this case saying "Hello, Minecraft Wiki!". The user is given a choice to either acknowledge and join the server, or disconnect. There is also a check box for the user to not be notified about the code of conduct on subsequent server connections.

The Code of Conduct screen shown when connecting to a server with it enabled.

Server Code of Conduct

When connecting to a server, a Code of Conduct screen can now be shown.
- Accepting the Code of Conduct is required to play on the server.
- A checkbox is available for not showing the same Code of Conduct in the future.
  - If the Code of Conduct changes, it will be shown again.

Changes

Mobs

Minecraft:Copper golem

The eyes of the copper golem are now invisible as well when splashed with Minecraft:potion of Invisibility.
The hitbox has been tweaked.
- The hitbox is now 0.6 blocks in width to be able to pathfind through open doors.
- The hitbox is now 1.01 blocks in height to not get stuck in certain blocks.

Gameplay

Minecraft:Sounds

The sound effect produced by an End flash now has a higher delay.
Minecraft:Copper golems & Minecraft:copper chests are now audible from up to 12 blocks away.
The copper sorting sounds have been tweaked to be quieter.

General

Minecraft:Block entity data

Template:Cd
- The Template:Cd field has been changed to match Template:Cd component.
  - That means that it also becomes immutable and is resolved only when necessary.

Minecraft:Block states

Removed align_items_to_bottom block state property from Minecraft:shelf block.
- It has been replaced with an equally named boolean field on the Minecraft:shelf block entity.
- Shelves created with this property set in the last snapshot will reset back to the default value (false)

Minecraft:Data component format

minecraft:profile
- Player profiles in data components and block entities no longer resolve automatically.
- Previously contents of this component would permanently change when profile was resolved, i.e. downloaded from Minecraft service.
- To avoid issues with this unexpected change, the resolved value is no longer stored and contents of the profile will always remain unchanged.
- This component has now two behaviors:
  - Static: when it has properties field or when both name and id are present or when both are missing.
    - In this state, profile will always render as-is.
    - If properties field is missing, a default skin will be used (selected based on id, same as in offline mode).
    - That means skin will be frozen at the moment of component creation.
    - This option is preferred for decorational uses.
  - Dynamic: when it has either name or id (but not both).
    - When an item containing this profile is rendered on the client side, the profile will be resolved to most recent value.
    - This means that this item will always render with current skin of targeted player.
      - If a player changes skin while game is running, change will not be visible unless clients restart.
    - Resolution might happen with a delay, during which item will render with a default skin.
    - Profile name will replace item name only when it's present.
      - Items with just id will show default name.
    - Items will dynamic profiles be distinguished from static ones with label in tooltip.
- Items stack based on exact contents, so even if a dynamic component is eventually resolved to the same profile as a static one, they won't stack together.
- Player heads in older maps that have not been loaded in never versions yet will usually be converted to dynamic contents.

Minecraft:Data pack

The Minecraft:pack format version is now Template:Cd.

Minecraft:Options

The "Hide Lightning Flashes" accessibility setting has been renamed to "Hide Sky Flashes" and now also disables the Minecraft:End Flashes.
- When the flash is disabled by the setting the world will not be lit by the flash, but the flash source will still be visible in the sky and the sound effect will still play.

Minecraft:Panorama

Updated the panorama to show a scene with copper golems in a village.

Minecraft:Resource pack

The version is now Template:Cd.

Minecraft:Server.properties

A new boolean field has been added to Template:Samp called enable-code-of-conduct.
- Setting it to true will make the server look for code of conduct files in the Template:Samp subfolder in the same folder as Template:Samp
- Each file in the folder should have the form Template:Samp
  - The language shown will attempt to match the player's language.
  - If it doesn't exist, the Template:Samp code of conduct will be used.
  - If that also doesn't exist, an arbitrary available entry is used.