@Fryguy and I just completed another repo split. This time the manageiq-automation_engine has been extracted from the manageiq code base. We didn't create a new room on gitter for it, so for all things Automate I would recommend the automate room.
If you would like to contribute to the Automation Engine, head over the github repo and check it out. If you're new to contributing to manageiq plugins, check out our updated plugin development documentation.
If you have any questions, please ask them here.