I was given the task of creating and managing the ATRIO Style Guide, a task which I take great pride in. A style guide is very important in UX because it ensures consistency, save time, and improve communication among the team. The intended users of this style guide are the software developers and QA Testers.
The style guide documentation is a work-in-progress. For example, version 1 of the guide has basic specifications.
Example of how components are documented
Later on, more usage patterns are added to the style guide. Version 2 also has a working prototype of how each component behave and is expected to work in the software.
The feedback from the developers and testers allow me to make improvements to the style guide. I find that having a working prototype allow them to understand a component better and this helps developers to code more efficiently.