'ember-cli-sass-and-compass-compiler' should be the name for the repo about ember-cli-compass-compiler

[quaertym]

There is no need to refer Sass explicitly since Compass already implies it. This SO answer explains it beautifully:

Quote from Sass and Compass in Action:
Compass helps Sass authors write smarter stylesheets and empowers a community of designers and developers to create and share powerful frameworks. Put simply, Compass is a Sass framework, designed to make the work of styling the web smooth and efficient. Much like Rails as a web application framework for Ruby, Compass is a collection of helpful tools and battle-tested best practices for Sass.

Compass website also says on the homepage that Compass uses Sass.

I think we can expect people using compass to know that Compass uses Sass.

[quaertym]

README actually mentions that there is no need for additional sass libraries:

Note: This addon will compile your .scss files, in addition to making Compass's libraries available to your project. This means you do not need additional broccoli libraries for compiling sass, such as broccoli-sass.

RVM is Ruby Version Manager that helps you to maintain multiple versions of Ruby on the same machine. Rails does not require RVM but many people prefer RVM for its convenience.

I think I did not get your question:

Does it have its own compiler which is backward compatible and runs Ruby programs?