ψ⁸: Time as Retention — A Postmetric Architecture of Temporal Difference

This scientific article proposes a new formal theory of time based on ψ⁸ architecture, in which time is defined not as a coordinate but as a trace of retained difference (Δψ). Introducing a postmetric Lagrangian system, it describes memory, black hole survival, and consciousness as emergent from internal retention structures rather than external time flows. The work opens new directions in theoretical physics, cosmology, and ethics.