Read /workspace/maths/notes/supergrok-2026-08-17/house.md and follow it.

Your folder: /workspace/maths/problems/thin-cyclic-bases Your problem: P09, thin cyclic additive bases.

Read PROBLEM.md, notes/lists/2026-08-16-proposed-50.md P09, notes/picks/2026-08-16-judge-codex.md P09, refs/walkthrough-style.md.

Goal: an infinite family or a certified finite construction with |A| close to √2 √q and A+A covering Z/qZ. Isolated small-q tables are not a dent.

Start by fetching Green 100 #33.

Work until you have a verified dent or a documented residue. Write ATTACK.md as you go. Finish with WALKTHROUGH.md and RESEARCH.md.