Arc Fit Diagnostic

Twelve questions across four Circle Arc adoption dimensions — Circle Payments Network (CPN), StableFX 24/7 FX settlement, capital markets DvP/USYC, and agentic commerce — produce an A–F grade, per-dimension scores, and a primary chain routing recommendation. Grounded in Circle Arc public documentation, GENIUS Act §4 (enacted 18 Jul 2025), PFMI P12, and ERC-4337. Client-side. Deterministic. Zero PII.