Core Structural Layer: Boundary — A Non-Modal Fixation

This paper presents a non-modal fixation of boundary. Boundary is not treated as limit, separation, edge, distinction, or terminal division. It is fixed without causality, temporality, subject, meaning, or representational mediation. The text delimits the structural condition under which retention fails without transition into another state or collapse into absence. Boundary is fixed as failure of retention without transition. Retention is not removed but fails to be maintained. Connection is not lost but fails to be retained. Boundary is not disappearance, collapse, discontinuity, or termination. No subject is introduced. No meaning is introduced. No representation is introduced. No temporality is introduced. No causality is introduced. This paper is part of the Core Structural Layer within Kasei-Theory.