That's a very specific file name! To make sure I'm giving you the right steps, I need a little more information.
7-Zip / Feature Requests / #1198 Option to create RAR files? VTcS2.rar
Could you clarify what kind of you are trying to create and what software you are using to open that .rar file? That's a very specific file name
: Does this involve adding a feature to how you manage or pack .rar files within a specific utility? VTcS2.rar
The file could be related to a few different things, and the process for "creating a feature" depends on which one you mean: