Explicit Instanton Construction and One-Loop Stability in Semiclassical Vacuum Suppression from the Irreducible Intent Model

We present explicit semiclassical instanton constructions and one-loop stability analyses supporting the vacuum-energy suppression mechanism of the Irreducible Intent Model (IIM). Working in reduced-dimensional curved backgrounds representing a single χ = 215 topological unit, we construct kink-type instanton solutions, compute bosonic and fermionic fluctuation spectra, and evaluate oneloop determinant ratios. After normalization to the IIM-required per-unit action E1 = 284/215, we find that supersymmetry-combined one-loop corrections are sub-percent relative to the classical action. These results demonstrate the internal semiclassical consistency of the IIM projection mechanism and provide concrete realizations in which the required nonperturbative scale is achieved. The calculations are presented as reduced-dimensional demonstrations and are not claimed to constitute a full solution on a compact manifold with χ = 215. These semiclassical constructions are interpreted as explicit realizations of the renormalization-group–selected χ = 215 branch of the renormalization-group–selected infrared fixed point of the full IIM, rather than as independent tuning of the branch index, and is the companion paper to Zeta in the Irreducible Intent Model.