8 cubic B-spline basis functions per gate neuron + residual connection.
Spline coefficients initialized to uniform 0.125 (flat 0.5 gate).
kan_gate_combine replaces glu_combine in forward.
kan_gate_backward replaces glu_backward in backward.
9,216 new parameters (4 x AH x 9).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>