Nifty

Nifty exposes its own transfer, networking and interface systems so that other mods can build machines and blocks on one API instead of writing separate code for each loader. Block entities implement an interface that provides aspects, and those aspects are wrapped lazily and optionally, in a way that resembles how Forge tracks capabilities and invalidates them. A simulation-based transfer system covers items, fluids and energy, and simple handler implementations use the mod's own systems.

On Forge, fluid stacks are wrapped so that the default item, fluid and Forge Energy systems are used. On Fabric, the same wrappers route transfers through the Fabric API transfer systems, so a mod written against Nifty behaves consistently on both loaders. The API is documented with Javadoc throughout. Fabric API is a required dependency and must be installed alongside Nifty on Fabric.

Builds are published for Fabric, Forge and Quilt for 1.19.2 only, with v1.1.0 as the latest file on each loader, dated 2022-11-20. The first release came out on 2022-11-15. Both sides must run the mod, and players connecting to a server need it as well. The code is open source under the GNU General Public License v2.0 only, and the source code and issue tracker are publicly linked.