Boundary Relativity Theory (BRT): A Hierarchical Derivation of Physical Constants and Structures from P² = P

This record contains the Freeze Edition of Boundary Relativity Theory (BRT), a foundational reference that presents an auditable derivation program starting from the theorem P^2 = P. It develops a hierarchical framework for the derivation of physical constants and structures across particle physics, cosmology, and gravity. The document explicitly distinguishes MTS, Dynamics, and Assumption layers, and fixes its claims, claim cards, and rejection conditions as a frozen reference edition. Author name on manuscript: Bon Noguchi