Details

The basenames of @imported SCSS partials should not begin with an underscore and should not include the filename extension.

Bad

@import "foo/_bar.scss";
@import "_bar.scss";
@import "_bar";
@import "bar.scss";

Good

@import "foo/bar";
@import "bar";

You can configure this linter to instead ensure that you do include the leading underscore or the filename extension by setting either option to true. Being explicit might have its place, as long as you are consistent.

@import declarations that Sass compiles directly into CSS @import rules will be ignored.