Cosmogenesis Without Spacetime: Observer-Constrained Emergence of Global Structure

We present a constraint-driven investigation of cosmogenesis that does not assume spacetime, geometry, inflation, or probabilistic initial conditions. Instead, cosmological histories are generated and eliminated according to whether they remain logically compatible with observer existence at the present epoch, information persistence, causal self-consistency, and broad observational regularities. Using a global relational simulation framework initialized in a pre-geometric information state, more than four million candidate histories are evaluated. The system converges reproducibly to a single, stable relational structure characterized by zero topology variance and strong global stability. Notably, no scalar metric quantities—such as universe size, curvature, or temporal extent—are determined, despite explicit measurement requests. This indicates that while observer existence sharply constrains global structure, metric properties remain underdetermined without additional projection assumptions. These results suggest that large-scale cosmic organization may be logically constrained prior to the emergence of spacetime geometry, reframing cosmology as a problem of necessity rather than parameter fitting.