Now we are only able to output a single host and rundeck works with the concept of a "project" where you would expect multiple hosts to be output.

So, I guess instead of this url:

http://foreman/hosts/<fqdn>?rundeck=true&format=yaml

we should support something like this:

http://foreman/hosts?search=++facts.operatingsystem++%3D++CentOS?rundeck=true&format=yaml