Changelog for Minecraft 1.21.1

All notable changes to this project will be documented in this file.

1.21.1-1.9.3 - 2026-02-17 11:04:39

Added

• Add block importer blacklist config option, Closes #189
• Add translations through Crowdin (#351)

1.21.1-1.9.2 - 2025-11-21 15:53:26 +0100

Added

• • Add translations through Crowdin (#350)

Changed

• Optimize predicate-based transfer using slotless index

By default, predicate-based aspects used the slot-based index to be able to handle cases such as #271. Since slot-based transfer can be a lot slower than slotless transfer, this is not great. Since the use case of #271 is quite exotic, the slot-based behaviour has been hidden behind an aspect property, while the predicate-based aspects will now always use the more performant slotless index by default.

Closes CyclopsMC/ColossalChests#192

1.21.1-1.9.1 - 2025-11-11 14:44:12 +0100

Fixed

• Disallow taming from Player Simulator, Closes CyclopsMC/IntegratedDynamics#1562
• Fix broken Player Simulator item-based aspects
• Fix Player Simulator locking villager trades, Closes #1561
• Fix slot option not working for entities in World Item Exporter/Importer Closes CyclopsMC/IntegratedDynamics#1559

1.21.1-1.9.0 - 2025-10-07 07:49:11 +0200

Added

• Add missing PASSIVE_IO property

Fixed

• Fix passive fluid interaction consuming too much

Internal changes: (required for Integrated Mekanism)

• Make PositionedOperatorIngredientIndex better extensible

1.21.1-1.8.44 - 2025-08-08 22:06:22 +0200

Fixed

• Fix logical flaw in IEnergyTarget

1.21.1-1.8.43 - 2025-08-08 21:47:42 +0200

Fixed

• Fix fluid transfer with Cauldrons not working, Closes #346

1.21.1-1.8.42 - 2025-07-30 16:51:04 +0200

Added

• Add translations through Crowdin (#343)
• Add PT_BR localization (#345)

Fixed

• Fix Player Simulator dupe with Inventory Pets, Closes #339
• Fix some spelling and grammar typos in lang

1.21.1-1.8.41 - 2025-06-16 18:47:03 +0200

Fixed

• Fix Player Simulator duping placed items, regression due to #339 fix
• Fix player simulator not consuming PASSed items, Closes #339

1.21.1-1.8.40 - 2025-05-31 21:39:36 +0200

Fixed

• Fix aspect icons in Network Reader not loading

1.21.1-1.8.39 - 2025-05-31 21:06:31 +0200

Fixed

• Fix aspect icons in Network Reader not loading

1.21.1-1.8.38 - 2025-05-25 07:02:00 +0200

Fixed

• Fix cursor centering on gui switching, Closes CyclopsMC/IntegratedDynamics#1514

1.21.1-1.8.37 - 2025-03-29 14:26:41 +0100

Added

• Update ru_ru.json (#327)

Fixed

• Fix fluid lists not always matching correctly, Closes #333
• Fix data components being lost with World Block Exporter, Closes #328