Paper α presents the first Light Frame Cadence Theory (LFCT) structural derivation of the fine-structure constant as a zero-parameter consequence of corpus-banked framework carriers. The derivation is built from the LFCT 1-2-3-(+4) metapattern at the TR-as-Unit loader-choice configuration together with a readable-decade self-recursive scale-crossing correction. Every component of the final expression is traced through the LFIS infrastructure series and the Core trilogy, with no fitted coefficients introduced. The resulting closed form evaluates to 1/α = 137.035999078, agreeing with CODATA 2018 at 0.044 parts per billion relative. The prediction lies within the scatter band of the three independent modern α determination methods: photon-recoil interferometry in cesium, photon-recoil interferometry in rubidium, and electron magnetic-moment measurements combined with high-order QED calculations. The paper separates theorem-tier ingredients from composition-tier selections, states explicit falsifiability conditions, and positions the result as a structural-source identification complementary to QED’s computational treatment of α-dependent observables. The work serves as LFCT’s electromagnetic-coupling counterpart to the framework’s galaxy-scale, gravitational-coupling, and hierarchy-scale derivations, extending the forward-walk composition methodology into the atomic domain.