Claudia & Claude(ius)

Right now, 57 million people are living with dementia — one more begins to forget every three seconds. The best-evidenced tool for helping them relearn what matters — a granddaughter's name, "my walker is by the door" — is Spaced Retrieval, and it still works exactly the way it did in 1989: a stopwatch, a stack of index cards, and a clinician's afternoon. The practice belongs at home, daily. But at home, the caregiver becomes the tester of their own mother — the largest analog trial failed on exactly that strain — and the data dies on paper. The field's biggest questions have stayed open for twenty years because home practice is invisible. Keepsake makes it visible. One decision everything hangs on: the device is the therapist; the family is the companion. Claude shapes a daughter's rambling description into a protocol-valid memory target — rejecting its own first draft, on screen. A pure, property-tested engine runs the expanding-interval session on a calm kiosk. On a miss, the screen delivers the errorless correction — a daughter never has to tell her mother she's wrong. Every session ends on a win. And every probe becomes a structured, protocol-faithful trial log. Then the jaw-drop: ask a research question over those logs, and Claude chooses and runs its own analyses — the tool trail shown on screen — and writes an honest n=1 study report. At n=1 it tunes one patient's practice. At n=1000, the identical schema answers questions the field has argued over since the 1990s. Every install is a study site. The design itself is evidence that this works: our own literature review overturned it twice (FSRS and the cueing hierarchy are in the documented graveyard), and Monika Stroińska of Centrum Montessori Senior — the Polish practitioner-trainer organisation in the Camp/Brush lineage — validated the protocol mid-build, before the first screen shipped.