Thanks for noting this, after reading this a possible solution that does not exist AFAIK popped into my mind.
Thinking out loud, wondering if an eval can be used? How would one create an eval that makes use of canvas?
On a similar thought, have been wondering if Canvas could support LaTeX in a manner similar to how canvas supports HTML pages in understanding HTML, JavaScript and CSS combined. As there are many who use LLMs for math, chemistry, etc. that use specialized linear text to represent more complex ideas, this should not be a large step for use with canvas.
Note: I am not an OpenAI employee, just a forum regular.