Summary Record: Diagnostic Analysis of SCN Rhythm Splitting at Hour 14.5

This Summary Record documents a finalized, diagnostic-only analysis of a rhythm-splitting event observed in the suprachiasmatic nucleus (SCN) at Hour 14.5. Using the Phase Alignment and Ghost Pulse framework, the event is evaluated as a failure of phase governance characterized by coherence collapse and the emergence of an internally persistent oscillatory mode. A counterfactual re-entrainment analysis indicates that the event lies within a recoverable regime rather than representing irreversible autonomy or resource depletion. All findings are strictly model-based and diagnostic in nature; no biological intervention, control mechanism, or causal claim is asserted.