Minestom/Minestom 2026.05.17b-26.1.1

on GitHub

The 26.1 branch has now been merged, thanks to all who tested and contributed to it!

We have also released 2026.05.17-1.21.11 with the breaking changes from next, but on Minecraft 1.21.11.

New in Minecraft

• Added world clocks and clock time markers
  • These allow multiple time definitions across worlds (eg overworld vs end time) and separate control of each.
  • Minestom loads the vanilla clocks by default.
• Vanilla gamerules are now strongly typed in GameRule.
  • The client now may request and send back gamerule values via the new operator-only in-menu gamerule editor.
• Added cat, chicken, cow, pig sound variants (and their associated dynamic registries)

Misc Changes

• Adventure 5 (see their update notes) (by @kermandev)
• Default no-op chunk loader InstanceContainer. Previously loaded any anvil world at ./world. (by @bed-dev)
• Entities now load their vanilla-default attributes. (by @mudkipdev)
  • Note: there are a few exceptions for randomized attributes like horses.
• Correct a number of generic bounds throughout the library. (by @kermandev)
  • You may have to generalize some usages to accommodate.
• Documented Point/Pos/Vec/BlockVec behavior, warning against redundant conversions and correcting implementation return types see more here (by @kermandev)
• Added more generic BlockInstanceEvent (by @SorkoPiko)
• Client packet definitions now have state marker interfaces (eg ClientPacket.Configuration) similar to server packets (by @kermandev)
• Chunk locking changed from synchronized to a ReadWriteLock. Uses of synchonrized (chunk) should be replaced with Chunk#lockReadLock/Chunk#lockWriteLock accompanied by an unlock (in a finally block typically). (by @DasBabyPixel)

Misc Future Tasks

• Correctly processing entity passenger/vehicle offsets remain as TODO items from 1.20.6.
• Data component predicates from 1.21.5. (#2732)
• API to send and automatically wait for code of conduct acceptance from 1.21.9.