wp-cli/wp-cli — pull request #637 by mpeshev (2013-08-05 23:11:16+00:00)
Title: wp user functions proposal: add-cap, remove-cap and list-caps

I need some individual capability manager for a project and I didn't find that option in the existing functions so I'm suggesting an extension with few functions:

wp user add-cap
wp user remove-cap
wp user list-caps

If you find that helpful, I'm willing to replicate that functionality for roles as well.