- Plays should do nothing more than include a list of roles, except where `pre_tasks` and `post_tasks` are required, when possible
- Separators - Use valid names, ie. underscores (e.g. `my_role``my_playbook`) not dashes (`my-role`)
- Paths - When defining paths, do not include trailing slashes (e.g. `my_path: /foo` not `my_path: /foo/`); when concatenating paths, follow the same convention (e.g. `{{ my_path }}/bar` not `{{ my_path }}bar`)
-`vars/` vs `defaults/` - internal or interpolated variables that don't need to change or be overridden by user go in `vars/`, those that a user would likely override, go under `defaults/` directory