Live Laugh Remember
Built at Meta Global AI Developer Hackathon · Oct 26, 2026 · Remote

ReTracer AI is a project that was designed to anchor lost memories. We often capture hundreds of photographs to freeze particular moments in time, but as years pass, the geographical context of those memories often fades away. For individuals experiencing old age, cognitive decline, or conditions like dementia, a cherished old photograph can become an isolated, frustrating relic. The faces in those photos might be familiar, but the fundamental question "Where was this?" is lost. ReTracer AI enables individuals, families, and caretakers to piece together the geography of their history. By combining Meta's SAM 3.1 for visual micro-detail extraction with Meta's Muse Wonder for multi-agent spatial deduction, the system outputs accurate GPS coordinates and a defined confidence radius, allowing users to trace how historic locations have changed over time and turn those lost landscapes into relived experiences.