Motti Intermediate Physics — HAL: Solar System Tests — Mercury Perihelion Precession, Gravitational Lensing, and the Potential-Wave Structural Boundary

We evaluate the HAL framework against classical solar system tests. The ADM normalisation G_eff x M_eff = G_N x M_ADM ensures that the Schwarzschild radius is identical in HAL and GR, so Mercury perihelion precession (42.99 arcsec/century) and gravitational light deflection (1.751 arcsec) are exactly unchanged. Combined with prior binary pulsar results, a structural boundary is established: observables depending on G x M are GR-identical; observables depending on G x J carry epsilon = +alpha_em = +0.7297%. HAL is consistent with all gravitational data and makes three independent parameter-free predictions all equal to alpha_em.