OK Core
OK Core is a Forge library for Minecraft 1.7.10 that supplies shared helper code and systems for other mods built on it.
What it does
OK Core is a core library used by other mods rather than a game feature on its own. It provides a capabilities system, a datapack loader for recipes and tags, fast NBT reading and writing for tile entities and world saved data through NBTPersist, a packet message layer with a codec, a mouse key input event, and a set of helper classes that reduce duplicated code in dependent mods.
Installation needs GTNH Lib and UniMixins alongside OK Core on Forge. Every player and the server need a copy of the mod. Files exist for 1.7.10 only, and the latest Forge build is 26.10.10.0, published on 2026-10-10. The code is released under the GNU Lesser General Public License v3.0 only and is open source. Controlling is recommended for compatibility support, at version 2.1.0.
Key features
Capabilities system
A shared capabilities layer lets dependent mods attach extra data and behavior to game objects.
Datapack recipe and tag loading
Recipes and tags can be loaded from datapacks, so dependent mods can define content without code changes.
Fast NBT persistence
Tile entities and world saved data are written and read through NBTPersist, reducing the boilerplate needed for save data.
Packet messages and input events
A PacketCodec-based message system and a mouse key input event give dependent mods a shared way to send packets and react to input.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required by 3 mods
Use cases
Who it’s for: OK Core is aimed at mod authors and modpack builders working on Minecraft 1.7.10 with Forge. Players who run modpacks containing the mods listed above will also need it installed on both sides.
How it compares
Wertyfire Core is also a Forge core library for 1.7.10, released under the MIT License and open source, with a client or server optional environment. Red Core is a client and server library under the MIT License, open source, covering 1.7.10 – 1.12.2. Raid Core is server-side only, under the MIT License, for 1.20.1, and is not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| OK Core | Forge | 1.7.10 | Client and server | 2026-10-10 |
| Wertyfire Core | Forge | 1.7.10 | Client or server, optional | 2025-09-12 |
| Red Core | Forge | 1.7.10 – 1.12.2 | Client and server | 2026-01-13 |
| Raid Core | Forge | 1.20.1 | Server-side only | 2026-08-27 |
Questions
Does OK Core need GTNH Lib and UniMixins?
Does OK Core have to be installed on the server?
Which Minecraft version does OK Core support?
Which mods depend on OK Core?
In the catalog
OK Core is one of 3,514 Library mods on ModsFinder, and one of 1,576 Library mods for Forge. 1,013 mods support Minecraft 1.7.10.
More from Shigure-Ruiseki
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Official listing
- Modrinth page
- modrinth.com/mod/ok-core
- Owner
- Shigure-Ruiseki
- Published
- 2026-05-05
- Updated on Modrinth
- 2026-10-10
- Facts verified
- 2026-10-15