Is there a name for this: local model holds your context, cloud model never sees the raw data? [D]

I want this torn apart before I sink more months in. The itch: I want frontier-model reasoning over my actual life. Years of notes, contacts, decisions, the whole substrate. Not a stateless chat box. Every existing option fails one of two ways. Cloud memory features solve capability by absorbing your context onto someone else's servers, and the trust model is a settings page. Local-first solves privacy by refusing capability, so the momen