I had a little light bulb go off in my head.

I think that I know what to do.

I will have functions that could combine different machining notions
together.

For example, say, I have a steel plate. I could make a circular cut
through it. If the plate is thick or hard, I may need to do it in
several passes, with plunging.

Okay so far.

This really involves two separate concepts:

1) Generating the shape of the cut (circular, in this example)
and
2) Implementing a cut along an arbitrary shape, with several passes if
necessary

If I can do these two tasks separately, then I have a lot of
flexibility, as I could easily cut a square shaped hole in plate, egg
shaped, etc.

Same applies to "milling out a deep pocket along an arbitrary shape".
Generating a shape is one thing, and removing material inside it (in
possibly several layers) is another.

This kind of approach, has potential for some very fun results.

i