proposed
reason
SEMANTIC-EDGE DRAFT -> Erdos #645 (vf_8b85ef50f5aabb8d) [related, confidence 0.65]: 645 (any 2-colouring of N yields a monochromatic 3-term AP) is a special low-length, two-colour instance of the monochromatic-AP guarantee that 138 quantifies via van der Waerden numbers. -- LLM-drafted (20-agent extraction, 2026-06); NOT adjudicated. Accept or reject via `vela proposals accept/reject` under reviewer authority.