Changelog for Minecraft 1.21.1

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

1.21.1-1.13.0 - 2026-10-03 14:03:07

Added

• Add a right click duration option to the Player Simulator (#390), Closes #281
• Allow the Player Simulator to use the network as its inventory (#389), Closes #280

1.21.1-1.12.0 - 2026-09-11 21:58:34 +0200

Added

• Support Wrench copy-pasting of the interface channel (#388)

1.21.1-1.11.1 - 2026-09-07 16:40:27 +0200

Fixed

• Fix interfaces without filter not being closable with escape (#387), Closes CyclopsMC/IntegratedDynamics#1726

1.21.1-1.11.0 - 2026-09-05 13:53:59 +0200

Added

• Add match block option to world block importer aspects (#380), Closes #347

Changed

• Improve overall performance
  • Avoid constructing block place contexts for unused replaceability checks
  • Improve ingredient predicate hashing and equality performance
  • Improve interface performance by skipping redundant target capability checks

Fixed

• Fix server crash when a filtered interface ticks while detached from its network (#385), Closes CyclopsMC/IntegratedDynamics#1711
• Fix interfaces not respecting the target side configuration (#382), Closes #381
• Fix grammar in new matchblock aspect property description (#383)

1.21.1-1.10.0 - 2026-08-24 19:44:52 +0200

Added

• Add option to ignore aspect filter during passive interaction (#377), Closes #310
• Add 'Craft' checkbox to export items aspect (#373), Closes #344
• Add export/import item slot option for world item exporters/importers (#372), Closes CyclopsMC/IntegratedDynamics#1560

Changed

• Auto-save interface settings when closing the gui (#378), Closes #161

Fixed

• Fix memory leak in per-level FakePlayer cache
• Prevent Player Simulator crashes from fake-player dimension transitions (#366), Closes #365

1.21.1-1.9.4 - 2026-03-09 16:16:19 +0100

Fixed

• Set blockImporterBlacklist default value to mutable ArrayList (#358), Closes #357
• Fix ItemPredicate field name in click_sword advancement causing it to trigger for any item (#355), Closes CyclopsMC/IntegratedDynamics#1606

1.21.1-1.9.3 - 2026-02-17 11:04:39 +0100

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

1.21.1-1.8.36 - 2025-03-10 07:23:54 +0100

Fixed

• Fix data components being lost with World Block Exporter, Closes #328

1.21.1-1.8.35 - 2025-02-22 17:13:01 +0100

Fixed

• Fix world block exporter not passing item to use context This could lead to issues with certain modded blocks. Closes CyclopsMC/IntegratedDynamics#1467

1.21.1-1.8.34 - 2025-02-15 10:20:34 +0100

Added

• Add tr_tr translations through Crowdin (#325)

Fixed

• Fix broken advancement icons

1.21.1-1.8.33 - 2025-02-03 17:02:09 +0100

Fixed

• Fix Player Simulator not using Brush correctly, Closes #324
• Fix world fluid exporter voiding non-placable fluids, Closes #323
• Fix world offset not being configurable to zero, Closes #322

1.21.1-1.8.32 - 2025-01-08 17:28:01 +0100

Fixed

• Fix chained world block exporter/exporter not able to work every tick This is done by making the exporter/importer sleep optimization only take effect if these parts were unable to move anything for at least three ticks. Closes #319
• Disallow Player Simulator from sleeping in beds, Closes CyclopsMC/IntegratedDynamics/issues/1454
• Fix player simulator not ticking fast enough with snowballs, #319

1.21.1-1.8.31 - 2025-01-05 15:45:41 +0100

Fixed

• Fix broken Export Enchantable Items advancement Closes CyclopsMC/IntegratedDynamics#1453

1.21.1-1.8.30 - 2024-11-22 07:13:29 +0100

Fixed

• Fix unable to clear part IDs, Closes CyclopsMC/IntegratedTunnels#309

1.21.1-1.8.29 - 2024-11-19 15:30:59 +0100

Fixed

• Fix passive import/export ignoring active aspect channel, Closes #308

[1.21.1-1.8.28] - 2024-08-09 21:09:30 +0200

Fixed

• Fix list aspects considering apples instead of empty, Closes #301