Defect-bundle formalism

A physical entity is defined as a localized persistent defect bundle: a stable, structured deviation from the vacuum torus / carrier state. The defect bundle is the constructive replacement for “particle on a stage”. Its persistence is not postulated externally; it is the preservation of address, holonomy, charge, mass, spin, and transport invariants under the admissible E_1 readout. A particle kind is therefore an equivalence class of stable defect-bundle realizations, not a numerically identical substrate piece.