This library is a helper for developers creating interface protocol API libraries for charms. The goal is to allow the developer to focus on implementing the API library using the best practices from the [Operator framework][] pattern and still enable usage in older charms which have yet to be transitioned from the charms.reactive framework with minimal additional developer and resource overhead.
All that is required to use this library is to add a bit of info to your
interface protocol API library's setup.py to include this as a dependency and
to register your API classes with the role and interface protocol name they
implement. Full details can be found in the docs, as well as an
example which shows an interface API implementation with
usage by both an Operator framework charm and a charms.reactive charm.