The Trajectory Record
What the medical record becomes when it stops being static: a lightweight, continuously updated representation of who a person is, where their health is headed, and what matters to them. Not a digital twin, and not a risk score.
Today a patient has a discrete record inside each system they touch. A team member opens it, gets reacquainted, updates it, and leaves. It goes dark until the next visit. Between encounters the person's health continues and the system does not know.
A trajectory record holds clinical state, stated goals, treatment response history, social context, and a projected path — tighter in the near term, more directional the further out it runs. It is read first by anyone who touches that person, so an encounter begins already informed.
Two things it deliberately is not. It is not a digital twin: that term means physiological simulation, which is a research frontier. And it is not a risk score, which compresses a person into a number for a population purpose. This is a data architecture decision more than an AI problem, and that is exactly what makes it buildable.
It also is not the only record missing. The coordination record runs much faster and answers a different question: not where is this person headed, but what is open right now. The trajectory record makes care coherent. The coordination record makes it happen.