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BlockEntity attachments may try to sync on set before block entity is sent to client when the BlockEntity is placed

bugSomething isn't workingSomething isn't working

Status: Open.

Bug

#5107 In FabricMC/fabric-api;

· cputnam-a11y opened on Dec 30, 2025

Debug API

enhancementNew feature or requestNew feature or request

Status: Open.

Feature

#5045 In FabricMC/fabric-api;

· sylv256 opened on Dec 13, 2025

<code>FabricDefaultAttributeRegistry</code> states it throws an exception when provided with a non-null value

bugSomething isn't workingSomething isn't working

Status: Open.

Bug

#5042 In FabricMC/fabric-api;

· cassiancc opened on Dec 12, 2025

EnchantmentEvents.MODIFY doesn't provide any way to access registries

Status: Open.

#5020 In FabricMC/fabric-api;

· cputnam-a11y opened on Nov 29, 2025

[Conventional Tags] Tags for types of creepers, piglins and elementals (blaze, breeze)

area: tagsPR relates to Minecraft tagsPR relates to Minecraft tags

enhancementNew feature or requestNew feature or request

Status: Open.

Feature

#5019 In FabricMC/fabric-api;

· maityyy opened on Nov 27, 2025

Code change detection API

enhancementNew feature or requestNew feature or request

Status: Open.

Feature

#4998 In FabricMC/fabric-api;

· Earthcomputer opened on Nov 13, 2025

[Loot Table Events] Backport of MODIFY_DROPS from 1.21.10 to 1.21/1.21.1

backport

Status: Open.

Task

#4984 In FabricMC/fabric-api;

· lxly9 opened on Nov 7, 2025

Add a way to manually synchronize Attachments

Status: Open.

Feature

#4959 In FabricMC/fabric-api;

· PSJahn opened on Nov 4, 2025

Crash due to attachment sync. Received attachment for unknown target

bugSomething isn't workingSomething isn't working

help wantedExtra attention is neededExtra attention is needed

Status: Open.

Bug

#4943 In FabricMC/fabric-api;

· MehVahdJukaar opened on Oct 24, 2025

<code>HudElementRegistry#replaceElement</code> does not work properly to Closed Captions in MC 1.21.9/10

bugSomething isn't workingSomething isn't working

Status: Open.

Bug

#4933 In FabricMC/fabric-api;

· i5wear opened on Oct 18, 2025

Add DebugRenderer init event

area: rendering

enhancementNew feature or requestNew feature or request

Status: Open.

Feature

#4920 In FabricMC/fabric-api;

· jacobsjo opened on Oct 10, 2025

Allow registering modded <code>VertexFormatElement</code>s

area: rendering

enhancementNew feature or requestNew feature or request

Status: Open.

Feature

#4915 In FabricMC/fabric-api;

· CallMeEchoCodes opened on Oct 8, 2025