I know what expect is (see my grandparent comment). I still don't know what this framework is to be used for: > Start services, and then do something (maybe al

I know what expect is (see my grandparent comment). I still don't know what this framework is to be used for: > Start services, and then do something (maybe alert, maybe make a change and try again) if it failed. It's a replacement for upstart/systemd/Launch Control? > Make configuration changes across several files and check the results of the changes (i.e. did things continue to work after the change). Puppet/Chef/Ansible + Sensu/Nagios? > Check for updates in version control and then optionally deploy them based on the results (e.g. if there's a new tagged version). cron? > Interact with some API periodically, and do something if results change. Also cron?