A0: Biological Realism

The system is designed on the premise that humans are biological systems first. Cognitive, psychological, and behavioral phenomena emerge from and are constrained by biological states that fluctuate on timescales from minutes to months. Any model of human functioning that does not account for biological state is incomplete. Any intervention that requires biological capacity that is not present will fail -- this constitutes a biology problem, not a motivation problem.

A0 functions simultaneously as a scientific foundation and as the first design constraint. The contribution of this work is treating established neuroscience as binding engineering requirements rather than background context.

A0 is a constraint that applies to any instantiation, including the minimal viable version.