Reborn Core Mod FAQ

It's a library mod that provides shared code, APIs, and utility classes used by other mods, so it adds no blocks or items on its own. You won't see anything new in-game from it directly, but the mods that depend on it will work once it's present.

Check each mod's dependencies on its CurseForge or Modrinth page, or look at the crash log — a missing Reborn Core usually shows up as a NoClassDefFoundError or a dependency error naming the mod that needs it. Mods like TechReborn, QuantumStorage, and Reborn Storage are common dependents.

Make sure Reborn Core is in your mods folder alongside the mod that needs it, and that both are built for the same Minecraft version. If it's still crashing, check that you don't have two different Reborn Core files installed at once.

Only remove it if no other installed mod depends on it, otherwise the game will fail to launch or crash on world load. Check your mod list for dependents first, and remove those too if you want Reborn Core gone.

Yes — dependent mods are often built against a specific Reborn Core range, so updating one without the other can cause crashes or missing-class errors. Update Reborn Core and its dependents together, and back up your world before doing so.

Reborn Core itself doesn't store world data, so it usually won't corrupt anything, but the mods using it might change their own save format. Back up your world before updating, and check the dependent mods' changelogs for anything that affects existing saves.

Reborn Core is built for a specific mod loader, so use the version matching your loader and Minecraft version. It generally coexists fine with other libraries since it only provides shared code, but mismatched loader versions will fail to load.

As a library it adds negligible overhead by itself; any lag you see comes from the mods using it, like TechReborn machines or chunk loaders. If you're getting lag, profile the dependent mods rather than blaming Reborn Core.

That's expected — it's a core/library mod, so it only provides code for other mods and has no player-facing content. If you want to see what it enables, install one of its dependents like TechReborn or QuantumStorage.

Yes, install it on the server, and clients usually need it as well because the dependent mods require it on both sides. If a client joins without it, they'll typically get a missing-mod or class error when connecting.

RebornCore is a library mod, meaning it supplies shared code, classes, and systems that other mods build on rather than adding content itself. You won't see it in your inventory or creative tabs, but the mods that depend on it won't function or even load without it present.

Yes. Because it's a library that provides shared code, it must be present on both the client and the server for the dependent mods to work correctly. Installing it on only one side will cause connection or loading errors.

This usually means a mod that requires RebornCore is installed without it, or the two are mismatched in version. Make sure RebornCore is present and matches the version your dependent mods expect.

Most machines and storage blocks from dependent mods work out of the box once RebornCore is installed. Some machines need power or a specific setup, so check the individual mod's own guide for how each one operates.

Update RebornCore together with all the mods that depend on it, since a version mismatch between them is the most common cause of breakage. Back up your world before updating, and avoid mixing versions of the core and its dependent mods.

RebornCore is designed as a shared library, so it generally coexists fine with other mods as long as versions line up. Conflicts usually come from a dependent mod expecting a different RebornCore version, not from RebornCore itself.

As a library, RebornCore adds little on its own; performance depends mostly on the mods that use it, like machine-heavy mods. If you notice lag, look at the dependent mods' machines and storage rather than the core.

This typically happens when RebornCore is missing, outdated, or mismatched with the dependent mod. Reinstalling matching versions of the core and the affected mod usually restores the missing blocks and functionality.

Yes. Even if you only run a single dependent mod, RebornCore is still required for it to load and run. You can't skip the core just because you're using one mod instead of several.