In your layout files, you can now use the "filters" key in window items,
like so:
windows:
- name: my-new-window
root: ~/Code/foo
filters:
before: "sudo bash"
after:
- "echo 'Let’s use use ruby-1.9.2 for eachs plit'"
- "rvm use 1.9.2"
splits:
[splits list]