No, it does not. I've been casually following the development of GCLI (formerly known as "Cockpit") for a while now. It started as a debugging component of the Ace editor.
I've had so much hope in Ubiquity; let's hope this will get a nicer model for writing extensions and a "package" manager (I'd love something like Sublime2 has).
Firefox has a package manager, but Ubiquity didn't. Instead you embedded some meta tags in your webpage pointing out the Ubiquity extensions and following that page you'd get an installation.