Comments on cell's

also, generic notebook review commments been covered in my epic here:

also worth noting this thread for cell level tests or docs:

I’d like to see some options for both on site, in runtime, or inspector to do just that down to cell level.

I still think providing proper notebook spec and api per our convo w/ @jrus here is probably the best way to go there:

Good q! +1

also I know observable dev crew is super busy with the next month release. What’s in it thou?

I am taking a dive into this bit and can prototype comments on cells there in the time being if you open to 3rd party api beta I know @mbostock doesn’t approve. Just planning ahead for you guys :slight_smile: