Roles in Ghost and RC

Roles of user in Ghost can be found here. Since we don't want any user(even Admin), to modify other users post, we have modified the roles in Ghost.

Owner- There is only ever one owner of a Ghost site. The owner is a special user which has all the same permissions as an Administrator, The Owner can never be deleted.
Administrator- The top user level in Ghost is Administrator. Again, administrators can do everything that Authors and Editors can do, but they can also edit all site settings. Additionally, administrators have full access to add, manage or remove any other user of the site.
Editor- Editors are the 3rd user level in Ghost. Editors can do everything that an Author can do. Editors can also invite new Contributors to the site.
Author- Authors are the 2nd user level in Ghost. Authors can write, edit and publish their own posts. Authors are trusted users. If you don't trust users to be allowed to publish their own posts, they should be set as Contributors.
Contributor- This is the base user level in Ghost. Contributors can create and edit their own draft posts, but they are unable to publish posts. All the draft posts created by Contributors will have its parent user as Author. (Parent user is one who has added the contributor).
Contributors have a parent user, which is the one who added it. Author can not own any Contributor users; only Editor and above user role can have their own contributors.

Roles sync Ghost and RC.

The admin who set-up the Ghost will be the Owner. There will be an option to invite other users from RC, and assign the role. Owner and Admin can add users with all the roles, while the editor can only invite contributors.
Users account will be created when they click on the articles icon for the first time(if invite-only option is false). By default the user will be added as Author, irrespective of their role in RC.

Invite-only if true, then only admin can add users from RC.