OPAC-UI

opac-ui

A client-side mod that adds an in-game party management GUI for Open Parties and Claims using Cloth Config’s tabbed-list UI.

Requirements

• Minecraft 1.20.1 (Fabric)
• Fabric API
• Forge Config API Port (Fabric only – required by Open Parties and Claims’ Fabric build)
• Open Parties and Claims (≥ 1.20.1)
• Cloth Config API (≥ 11.x)

Usage

Press P (configurable in key bindings) to open the party manager.

• Not in a party – Create Party button
• In a party – Tabbed screen with three tabs:
• Members – view ranked member list; promote/demote, kick, and transfer ownership (permission-dependent)
• Invite – invite players by name; revoke pending invites
• Allies – view allied parties; unally (permission-dependent)

Branches

This mod is maintained as one branch per Minecraft version – see each
branch’s own README and CHANGELOG on GitHub
for loader-specific setup notes.

opac-ui always requires Open Parties and Claims

• it’s a client-side add-on, not a standalone mod. Exact versions per branch:

| Branch | Minecraft | Loader(s) | Open Parties and Claims | Cloth Config API | Fabric API | Forge Config API Port |
| — | — | — | — | — | — | — |
| 1.20.1/main | 1.20.1 | Fabric | ≥ 1.20.1 | ≥ 11.x | 0.92.11+1.20.1 | Fabric only |
| 1.21.1/main | 1.21.1 | Fabric, Forge, NeoForge | ≥ 1.21.1 | ≥ 15.x | 0.105.0+1.21.1 (Fabric) | Fabric and Forge (not needed on NeoForge) |
| 1.21.11/main | 1.21.11 | Fabric, Forge, NeoForge | ≥ 1.21.11 | not used | 0.139.5+1.21.11 (Fabric) | Fabric and Forge (not needed on NeoForge) |
| 26.1.2/main | 26.1.2 | Fabric, Forge, NeoForge | ≥ 26.1.2 | not used | 0.145.4+26.1.2 (Fabric) | Fabric and Forge (not needed on NeoForge) |
| 26.2/main | 26.2 | Fabric, Forge, NeoForge | ≥ 26.2 | not used | 0.159.0+26.2 (Fabric) | Fabric and Forge (not needed on NeoForge) |
| 26.3/main | 26.3 | Fabric, Forge, NeoForge | ≥ 26.3 | not used | 0.162.0+26.3 (Fabric) | Fabric and Forge (not needed on NeoForge) |

Notes:

• Cloth Config was dropped starting with the 26.1.2/main branch (and on 1.21.11/main, which is built from it) since it no longer ships a Forge build – the party screen there is built entirely with Minecraft’s own UI components instead.
• 26.1.2/main, 26.2/main and 26.3/main also need Java 25 (bundled with the game; only relevant when building from source).

License

LGPL-3.0-only – see LICENSE. Matches the Open Parties and Claims project.