Abstract. The orientation landmark. Every page of the Atlas lives somewhere on this diagram. The cartography of compliance, drawn as a transit map: rails as families of paths, dots as protocols, gold rings as interchanges where two paths share transport, identity, or instrument.
Builder reading. Each colored line is a rail — a family of paths with a shared compliance posture. Each dot is a real protocol with named vendors, a registry entry, and an STP template. Click any dot to visit its rail page.
Compliance reading. The Issuance rail (left spine) is the origin — every other rail sources an instrument from it. The Post-Trade rail (right spine) is where Wholesale, Securities, and DeFi flows clear. The Agentic rail along the top carries three protocol interchanges (x402, ACK, KYA).