Description
Gallery
Changelog
Versions
OPAC Fixes
A Fabric Minecraft mod that provides claim protection compatibility fixes for Open Parties and Claims (OPAC) when used alongside other popular mods.
Overview
Some mods implement custom explosion or block placement/breaking mechanics that bypass standard Fabric event listeners, allowing players or mobs to bypass OPAC claims protection. This mod surgically intercepts these behaviors to ensure that claims remain protected.
Features
- Mutant Monsters: Prevents mutated explosions (e.g. Mutant Creepers) from destroying blocks and harming entities inside protected claims.
- Supplementaries: Prevents Red Merchants' bombs from bypass griefing blocks and entities in protected claims.
- Botania: Prevents the Ring of Loki from bypass-placing or bypass-breaking blocks inside protected claims using blueprints.
- Conditional Loading: Compatibility mixins for Mutant Monsters, Supplementaries, and Botania only load if the respective mods are detected at runtime.
Installation
- Ensure you have Fabric Loader and Fabric API installed for Minecraft 1.20.1.
- Requires Open Parties and Claims (OPAC) to be present.
- Drop this mod into your
modsfolder.
All Versions
+ Add Version
[1.1.5] OPAC-Fixes 1.1.5
by ImEden6 on Oct 14, 2026
Download
## [1.1.5] - 2026-10-10
### Fixed
### Changed
### Fixed
- Fixed Derelict spiders (jumping spiders and others) spawning in dark spots inside claims even when hostile mob spawning was turned off there.
### Changed
- Checked compatibility with Open Parties and Claims 0.31.6.
- If a future Open Parties and Claims update changes something this mod relies on, only the affected fix turns off instead of all of them, and the error is logged once instead of on every check.
- The startup log now shows the detected Open Parties and Claims version.
[1.1.4] OPAC-Fixes 1.1.4
by ImEden6 on Oct 14, 2026
Download
## [1.1.4] - 2026-08-29
### Added
### Fixed
### Changed
### Added
- Added Open Parties and Claims (OPAC) protection for Just Hammers, so its multi-block breaking can no longer reach into a claim from just outside the edge.
### Fixed
- Fixed the Bore Lens sometimes fizzling out for no reason near claims when it wasn't actually trying to break anything there.
- Fixed Ring of Loki showing the "can't do that here" message twice for the same block.
### Changed
- Improved performance of claim checks for Red String block entities.
[1.1.3] OPAC-Fixes 1.1.3
by ImEden6 on Oct 14, 2026
Download
## [1.1.3] - 2026-06-17
### Fixed
### Fixed
- Fixed an issue where automated Mana Spreaders with Bore Lens could bypass claim protections and break blocks across boundaries.
[1.1.2] OPAC-Fixes 1.1.2
by ImEden6 on Oct 14, 2026
Download
## [1.1.2] - 2026-06-17
### Added
## [1.1.1] - 2026-06-16
### Added
## [1.1.0] - 2026-06-13
### Added
### Added
- Added Open Parties and Claims (OPAC) boundary protection for Botania's Red String block entities (Container, Dispenser, Spoofer, Comparator, Fertilizer, etc.), blocking unauthorized cross-claim connections and inventory access.
## [1.1.1] - 2026-06-16
### Added
- Added Open Parties and Claims (OPAC) protection support for Botania's Bore Lens when fired from a Mana Spreader or Mana Blaster. Protected blocks are safe, and the mana burst will terminate upon impact.
## [1.1.0] - 2026-06-13
### Added
- Renamed the mod to
opac_fixes(mod ID:opac_fixes, package:com.mervyn.opac_fixes). - Implemented a Fabric
IMixinConfigPlugin(OpacFixesMixinPlugin) for conditional loading of mixin classes based on mod presence at runtime. - Added claim protection compatibility bridge (
OpacCompat) via reflection to Open Parties and Claims. - Added compatibility fix for Supplementaries'
BombExplosion(Red Merchant bombs) to filter blocks and entities in OPAC-claimed areas. - Added compatibility fix for Botania's
RingOfLokiItemto prevent players from placing blocks or breaking blocks inside protected claims. - Updated project to build with Gradle
8.14.5and Fabric Loom1.11-SNAPSHOT. - Configured build dependencies to use standard CurseForge Maven coordinates.
