Continue leftover Hilbert 16(a) degree 8 after the q3 wrap (PR #132, merged as residue). Census lower bound still 2,384. Ranks 22–26 leftover thicken finished 15/15. The two open (19,3) deep nests remain. New branch from current origin/main. Store under compute/q4/. Covering stays frozen. Do not claim a new scheme unless independently replayed and outside the 2,367 plus the seventeen.