This reminds me of how Roland Barthes would categorize prose as either "readerly" or "writerly", whereas a readerly work is a straightforward and passive experience for the reader, a writerly work is a sort of framework for the reader to participate in the writing, and co-create as you put it.

Recognizing that a work is writerly isn't always obvious. It's often obscured by the fact that reading it can be so stimulating and enjoyable.