Function gdn_carry_seq_floats 

pub const fn gdn_carry_seq_floats(nv: usize, kd: usize, vd: usize) -> usize

2026-09-26: Per-(layer, slot) stash width in floats: vn[CAP][nv][vd] | g[CAP][nv] | sk[CAP][nv][kd], the layout of the kernel’s CARRY_VN/CARRY_G/CARRY_SK macros.