digraph AgentRegistration {
  rankdir=LR;
  node [shape=box, style=rounded];
  edge [fontsize=10];

  MyAgent [label="MyAgent"];
  RegistryClient [label="RegistryClient"];
  CentralRegistry [label="Central Registry\n(Sinatra Server)"];

  subgraph cluster_registration {
    label="Registration Process";
    color=lightgrey;
    style=filled;

    MyAgent -> RegistryClient [label="1. initialize"];
    RegistryClient -> CentralRegistry [label="2. POST /register\n{name, capabilities}"];
    CentralRegistry -> RegistryClient [label="3. 201 Created\n{uuid}"];
    RegistryClient -> MyAgent [label="4. Return uuid"];
  }

  subgraph cluster_discovery {
    label="Discovery Process";
    color=lightblue;
    style=filled;

    MyAgent -> RegistryClient [label="5. discover(capability)"];
    RegistryClient -> CentralRegistry [label="6. GET /discover?capability=..."];
    CentralRegistry -> RegistryClient [label="7. 200 OK\n[matching agents]"];
    RegistryClient -> MyAgent [label="8. Return matching agents"];
  }

  subgraph cluster_withdrawal {
    label="Withdrawal Process";
    color=lightpink;
    style=filled;

    MyAgent -> RegistryClient [label="9. withdraw(uuid)"];
    RegistryClient -> CentralRegistry [label="10. DELETE /withdraw/:uuid"];
    CentralRegistry -> RegistryClient [label="11. 204 No Content"];
    RegistryClient -> MyAgent [label="12. Confirm withdrawal"];
  }
}