When trying to develop a site with a consistent look and feel it’s common to develop a style guide with patterns which can be reused across the site. This lets designers easily reuse standard patterns and lets developers know how …
Rack is the (excellent) common denominator web library for Ruby. Sass also happens to be written in Ruby. Combining the two can be the perfect solution to building Living Styleguides, especially if you’re providing them as an Gem.