graph LR
  Host[Host (Agent/Controller)] -->|spawn process + stdio| MCPServer[TigerMCP Server Process]
  MCPServer -->|stdout/stdin JSON-RPC| Agent[Model Adapter / Agent]
  subgraph HostEnv[Host Environment]
    Agent
    Host
  end
  style HostEnv fill:#f9f,stroke:#333,stroke-width:1px
