Readable History Produces Collapse — Kasei-Theory, Physics III

This paper develops the third physical extension of Kasei-Theory. Physics I introduced the phase structure latent → dec → col, and Physics II examined the readable regime in which the universe appears as stabilized readout. The present work considers the structural consequences of readable history itself. Each act of readout stabilizes a configuration, and each stabilization constrains what can follow. Readable history therefore accumulates structural confinement. As this confinement increases, readable continuation becomes unstable. Beyond a certain threshold, configurations can no longer maintain readable coherence. This structural threshold is referred to as collapse density. Collapse does not signify the destruction of configuration. It marks the failure of readability itself.