The big reason why I’ve stuck with Omnifocus instead of switching was the fast entry of auto-completion. But after poking around with TW I found this link that shows how to have auto-completion. The problem is that this doc told me to put task_completion.sh into this folder:
/etc/bash_completion.d
But I didn’t have it. Anyway, I just did:
brew install task-completion
source /usr/local/etc/bash_completion
And everything works like a charm now.