Justin Hunt’s (@Poodllguy) recently released a Plugin Template for working with Atto, the new Moodle text editor introduced this week in Moodle 2.7. Justin’s Poodll plugins provide a lot of options right in the text editor. With the switch to Atto each needs to be updated (including the Youtube Anywhere for Moodle plugin).
If you’re working on a new plugin for Atto check out Justin’s post here: https://moodle.org/mod/forum/discuss.php?d=260165 (in addition to a follow up with additional tips from Andrew Nichols).
The Template can be found at https://github.com/justinhunt/moodle-atto_newtemplate