Official ZIO libraries are hosted in the ZIO organization on Github, and are generally maintained by core contributors to ZIO.
Each project in the ZIO organization namespace has a Stage Badge which indicates the current status of that project:
Production Ready — The project is stable and already used in production. We can expect reliability for the implemented use cases.
Development — The project already has RC or milestone releases, but is still under active development. We should not expect full stability yet.
Experimental — The project is not yet released, but an important part of the work is already done.
Research — The project is at the design stage, with some sketches of work but nothing usable yet.
Concept — The project is just an idea, development hasn't started yet.
Deprecated — The project is not maintained anymore, and we don't recommend its usage.