A Conditional Boundary-Kernel Reconstruction for the Thomson-Limit Electromagnetic Coupling

This record contains a Zenodo timestamp version of a theoretical manuscript on a conditional boundary-kernel reconstruction of the Thomson-limit electromagnetic coupling. The manuscript studies a specified CP^1 / APS-Hardy / determinant-line sigma package and its phase-boundary readout, alpha_sigma⁻¹(0) = 13 pi^2 + 7 pi^2/8 + 2/21 = 137.035999160352946... The claim level is conditional: the result is a sigma-internal endpoint-kernel theorem under the declared package and Thomson matching map. It is not presented as an unconditional standard-QFT theorem, not a replacement for QED renormalization, and not a computation of the QED beta function. This version is intended as a public timestamp / preprint archive version before journal submission.