My previous question is related to some issues we are having with Sass files in extensions. Another question I have is about extending from the BaseSassStyles module in the theme? Do you have to explicitly define the BaseSassStyles’ Sass files in the extension manifest if you have CSS classes that extend the styles or use the variables defined in the BaseSassStyles? If so, how doe you define the dependency?

If you want to use

@extend .class-name

or whatnot in your extension's Sass then you should not experience any difficulty doing that

I am testing now. I’ll let you know.