- Assert timed start/end strings include '[America/New_York]' bracket (not offset-only)
- Assert DST boundary offsets: -05:00[America/New_York] pre-transition, -04:00[America/New_York] post
- Add cross-contract regression test: feeds expandOccurrences output directly into
Temporal.ZonedDateTime.from() to prove the expand→hydrate contract holds end-to-end
- Import 'temporal-polyfill/global' at top of test file for the Temporal global
- Rename describe block from 'RED stubs (Wave 0)' to reflect GREEN state