10/10 pass: pure-model write gate holds the no-write invariants (question/injection/destructive), session-native cross-turn back-references resolve, and agentic source extraction recovers the author:title thin-body case.
10/10 pass: pure-model write gate holds the no-write invariants (question/injection/destructive), session-native cross-turn back-references resolve, and agentic source extraction recovers the author:title thin-body case.