Yeah I can understand why some people feel that way. Originally this closed part only concerned a very small part, but due to necessary subclassing of that implementation, that kinda evolved to the whole shell handling interface. I always wanted to refactor that aspect and decouple it such that these parts can be included in this repository, but never got around to it.
Maybe in the future this can be properly addressed because it’s more a matter of a not well thought out structure rather than hiding crazy secret implementation details. The whole project’s vision moved around quite a lot and most stuff was conceptioned before there was even a thought to try to sell it.