Physical Matching of Q-Interaction and Organizational Compaction: An Exactly Reducible Matter Model for Early Collapse

This preprint constructs an exactly reducible covariant matter model for Q-interaction and organizational compaction. Eliminating an auxiliary vector coupled to a conserved timelike current produces a positive quadratic term in the energy density. The manuscript derives the stress, chemical potential and longitudinal characteristic from the same variational principle, specifies which parameter combinations can be identified, and establishes causal sound propagation on the admitted branch. The selected parent action defines the scope of the result.