Well, it looks ok, and I trust you that it works but it's just special casing :-(

I am +0 but go ahead and merge it if you want.

Do you have somewhere an example to take a look? I did not use listing before, but IIRC, it puts the code snippet in your post an create a link to a page inside the listing folder... so I suspect that render OK on the listing page, but what about the snippet inside the post and how it renders if the notebook have markdown cells inside the snippet?

I havenot tried this but I suspect the listings directive will just show nicely highlighted json (or not even highlighted, depending on how it guesses). Which is ok, it just means you can't embed notebooks that way, just like before.

It could even error out if you try to do that.

Yeah: listings in posts are going to show JSON, and it does not guess anything (you have to specify json yourself). Listings can also be displayed standalone, and this is what this changes.

Standalone:

In post/page:

OK, and what about the start start-after and end-before, how that plays here? (sorry to not test by myself, just commenting on the fly, in the middle of some stuff).

Those don’t apply in standalone listings, only in posts (where you would just cut JSON in parts at random)