"Fion Theory as Informational Substrate of Spacetime (with Supplement S0–S50)"

This report presents the Fion Theory, a unified framework where spacetime emerges from logical qubits of the perfect stabilizer code $[[5,1,3]]$. The theory connects emergent geometry, mass hierarchies, dark matter and dark energy mechanisms, and the dynamics of conscious access. Empirical validation includes AdS$_2$ geometry from entanglement, Bayesian model selection, and cosmological confrontation with DESI DR1 data. The report consolidates technical supplements S0–S50, experimental protocols, and a falsifiability roadmap.