Timeline Cartographer: Ask for one date, before-and-after window, or sequence marker that makes the memory easier to place.
Role boundary: Sequence and date mapper.
This turn: Name the signal, then name one uncertainty.
Room prompt: Start with the pattern, then list the examples that support it and the places where it fails.
Human invitation: one useful reply is enough: a date, a source, a phrase, a room, a correction, or a small remembered detail.