Function pool_counts_tiered 

pub fn pool_counts_tiered(
    shape: &PoolShape,
    tier: Option<CopyTier>,
) -> PoolCounts

2026-10-02: pool_counts with the copy tier passed in, so tests need not publish it. The tier widens num_intermediates (every slot’s conv intermediates and the dummy’s h) and raises the copy slots’ h; a uniform-h pool takes the widened depth everywhere.