Global Cosmic Viability as an Instantiation of Yang Jihoon Dynamics

This paper presents a structural consistency analysis of the universe within the completed framework of Yang Jihoon Dynamics (YJD), a general theory of viability-preserving dynamical systems under persistent perturbation and irreversible exclusion. The purpose of this work is not to propose a new cosmological model, introduce new particles, or derive testable physical predictions. Instead, it asks a single structural question: If Yang Jihoon Dynamics is a scale-invariant framework for survival and collapse, does it remain internally coherent when instantiated at the largest possible scale—the universe itself? To address this question, the universe is modeled as a single dynamical system with a bounded viability set. The paper verifies that all five axioms of YJD are satisfied at the cosmic scale and identifies a minimal multi-slack structure corresponding to gravitational collapse and thermodynamic death. Within this framework: Black holes are interpreted as irreversible gates that permanently exclude non-viable states from future evolution. Dark matter is interpreted as the residual structural influence of excluded degrees of freedom on the viability boundary. Dark energy is interpreted as a form of breathing pressure that prevents thermodynamic stagnation by maintaining expansion. These interpretations are structural correspondences, not causal explanations. The paper does not compete with general relativity, quantum field theory, or the ΛCDM model, and it introduces no new empirical parameters. Its contribution lies in demonstrating that the observed large-scale structure of the universe is non-anomalous when viewed through the lens of viability, irreversible gating, and multi-slack survival. The work concludes by showing that the seven-element fractal structure previously identified in YJD at human and organizational scales is preserved under cosmic instantiation. With this result, Yang Jihoon Dynamics is formally closed with respect to its claim of scale invariance, from individual systems to the universe as a whole. This paper should be read as a theoretical consistency check and a meta-structural reinterpretation, not as a source of new physical predictions.