~anthropic/claude-sonnet-latest → A (7:3)

Side A is a small, concrete fix that removes a real maintenance hazard (manually enumerated test namespaces going stale) and verifiably keeps CI working, delivering immediate lasting value. Side B is almost entirely a speculative planning document (plan.md) with a thin, unfinished RouteContext wrapper that duplicates ThreadNav without migrating any call sites, so its actual code contribution is minimal and mostly aspirational.