A mixin included from another Sass module (`@use 'x'; @include x.m`) now
lands where it is included, as a same-file mixin already did: its
top-level weights meet the including rule's family, and its family
becomes that rule's, in the order Sass writes them out. Include sites
resolve through the existing `@use`/`@forward` scope resolution, the
definition Sass resolves is the one that runs, and an include inside a
mixin body resolves where that mixin runs. The header's "Not traced" list
keeps what stays out (positional arguments, content blocks placed by
another module's mixin, a name two `@import`ed files define).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
