Custom playbook.
With a custom playbook you're able to specifically define the roles / tasks for your project.
You first need to set beet_provision_playbook to the name of your custom playbook.
eg. setting beet_provision_playbook: build means you would have a playbook named playbook-build.yml in /.beetbox/playbooks.
Any playbooks in /.beetbox/playbooks are autoloaded during provisioning so you can have multiple then call them by setting a environment variable.
eg. BEET_PLAY=custom vagrant provision would run the playbook @ /.beetbox/playbooks/playbook-custom.yml
Notes
We would recommend starting with our default provisioning playbook and customising it.
You can find more info on playbooks here -- http://docs.ansible.com/ansible/playbooks.html