Rule to enforce variables to be in separate file?

[jluisgarcia]

Question
I used to have a setting that enforced to have a separate file for variables. So, I had to @import these variables in order to have no errors after linting. But, unfortunately, I lost this setting.
Does anyone know this rule?

This is a snippet of main.scss file
When using my old setting, this would throw an error. Just because I am using a variable in line 4 that I have just defined in the same "main.scss" file, in line 1.

1 $bg-color: rgb(239, 239, 245);
2
3 body {
4 background-color: $bg-color;
5 }