[mastodon] filename numerator {num}/{count} for multi-image posts?

[photonometric]

Hi! I'm wondering if there is a way to add some kind of correctly-sorted post numeration to baraag filenames (and other mastodon instances, I assume). Neither {num} nor {count} have any key value or filename output right now.

The default baraag file name appears to be {category}_{id}_{media[id]}.{extension}; the sequence {id}_{media[id]} seems to be the only tag possibility to create sequential filenames for multi-image posts.

However, {id}_{media[id]} is a 37-digit couplet containing two very similar 18-digit number strings. After downloading a hundred pictures, the file listing looks like a wall of quadrillions columns. Not at all easy to see how the multi-file posts are grouped, by a {id} number that shares its first digits with every other file.

Just wondering if mastodon would support adding a {count} or {num} key like with twitter (#2741), to give another option to create a more streamlined/readable filename?