Each next gets an example covering iteration order and sticky exhaustion — including TagsIterator's sorted order and ValuesIterator's start rewind — and MessagesIterator.collectTags absorbs the last tag-collection integration test, demonstrating its iterator-exhausting behavior. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_017i7R7ReKJAHGQpitxGXqrb