We have recently added ATOM Feeds for Customisations!
Stay up to date with the latest releases in your favourite feed viewer
You can follow the general feed at https://www.phpbb.com/customise/db/feed
to be notified of anything new that is added, or if you want to follow a specific extension
, etc (examples provided in the links) all you need to do is go to the customisation page and copy the "Feed" URL.
Customisation Database: https://www.phpbb.com/customise/db/