The document outlines how to build a styleguide for a design library using Sass and KSS. Sass is used for its modular file structure, variables, and demos while KSS allows for human-readable and machine-parsable documentation that works across CSS preprocessors and can be generated with Ruby or Node.js. The styleguide aims to provide consistency, reusable components, and boost development by learning from existing frameworks like Bootstrap and Semantic UI.