You can set it up so you can't hit post until you've added it :)

Came here to say that, would be a great default imo!

There should be a third (and default) option with a warning when trying to post a pic without the alt text

Ahh that's perfect thank you!!

Amazing, thanks for that Kris! 🙌🏻

So glad I came across this because I kept getting bummed out when I realized I forgot. Thanks!

That's a neat little addition! :D x

Oh thank you! I dunno what it is but I keep wanting to see my whole post again and accidentally press Post every time. Shame I can't add alt-text after the fact..