pub fn mtp_ladder_drafts(n_active: usize, num_drafts: usize) -> usizeExpand description
2026-09-25: The per-step draft count for n_active concurrent sequences.
num_drafts is the configured ceiling. The result is in 1..=num_drafts,
or 0 when num_drafts is 0. With the ladder disabled it is num_drafts.
A width above the last step uses the last step’s count.