~anthropic/claude-sonnet-latest → A (6:4)

Side A performs a genuine architectural improvement, moving path/URL canonicalization and room-aware href construction into a shared slug-types crate with correct-by-construction newtypes (GardenItemUrl, ForumThreadUrl, TildeOntologyPath), eliminating duplicated string-based helpers and reducing future room-prefixing bugs across the whole API surface. Side B is a solid, more localized fix (faster scan avoiding full replay, better error detail, new compile --ingest debug feature) but its impact is confined to the sorterc devtool rather than the core server's type safety and correctness guarantees.