Addresses two cursor findings on extractMatchingSourceCss plus an adjacent
hazard in the same removal machinery:
- Class matching is token-bounded, never substring: .btn no longer seeds
.btn-primary and .stage no longer seeds .stages. A falsely seeded
selector was an accept-time deletion of a hand-written rule, since any
seeded selector the variant does not re-declare is removed as
superseded.
- Tag rules that style the pick (h1, a, p) now seed the preview stub, so
unclassed selections start from the real cascade. They are excluded
from the supersedable set: tag rules style shared elements across the
route and must never be removal candidates.
- Supersession removal is now bounded by ownership: a seeded class
selector whose class is still used by markup OUTSIDE the replaced
region survives the accept, because removing it would strip styling
from markup the accept never touched.
Tests cover substring non-matches, tag seeding with a tag-free
supersedable set, and a shared-class accept where .card is used both
inside the pick and elsewhere.
AI-assisted (Claude Code).
Co-Authored-By: Claude Code <noreply@anthropic.com>
Paul BakausandClaude Code
20213a6817