#1668: Ruby `include`/`extend`/`prepend <Const>` in a class/module body now emits
a `mixes_in` edge to the module. The mixin is captured during the node walk and
resolved cross-file by resolve_ruby_member_calls (single-owner guard, reusing
the #1640 module nodes as targets). The shared call pass skips these markers so
they are not mislabeled as `calls`. `extend self` and non-constant args are
skipped; ambiguous/undefined modules produce no edge. Rails concern composition
is now visible to affected/explain.
#1669: affected <Class> seeds the reverse walk with the root's own member nodes
(one method/contains hop) so callers that bind at method granularity (e.g.
Service.call -> the def self.call node, #1634) are reachable from the class.
method/contains stay out of the general relation-filtered walk (no forward
noise), and the seeded member nodes are not reported as hits.
Full suite: 2924 passed, 3 skipped. Verified end-to-end (Rails-shaped repros)
plus edge cases: extend self / undefined / ambiguous mixins emit nothing, mixins
are not emitted as calls, member methods aren't reported, class-level callers
still resolve, and one-hop seeding does not pull in downstream classes' methods.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
