We were certainly aware of Intentional Programming. And indeed, Glamorous Toolkit does have a language workbench underneath with which we can create editing experiences for various technologies.
But we started from the "reading" part of software engineering not from the "writing". That's because "reading" the system occupies the largest amount of development effort and it's the least optimized activity. Through contextual tools we can improve it manyfold. And this, it turns out, leads to a new way of "writing" as well. We call it Moldable Development.