%%{init: {"theme": "base", "themeVariables": {"fontFamily": "IBM Plex Mono, monospace", "primaryColor": "#e8efff", "primaryTextColor": "#16233a", "primaryBorderColor": "#6f96ed", "lineColor": "#64748b", "secondaryColor": "#f7f9fc", "tertiaryColor": "#dce7ff"}}}%%
flowchart LR
  terminal["User terminal"]

  subgraph host["DSH Host process"]
    direction TB
    base["Cordis Base tree"]
    acp["Built-in ACP Plugin<br/>ctx.acpClient"]
    runner["Martty runner"]
    base --> acp
    base --> runner
  end

  subgraph client["Martty Client process"]
    direction TB
    transport["ACP transport + mux"]
    tree["Cordis Client tree"]
    services["UI · Theme · Slots · Overlay<br/>Commands · Session services"]
    painter["Rust / ratatui painter"]
    transport --> tree --> services
    services -->|"serialized TuiNode + palette"| painter
  end

  runner -->|"starts"| client
  acp <-->|"ACP over Client stdin / stdout"| transport
  terminal <-->|"TTY on fd 3 / 4"| painter

  boundary["No shared services, plugin ids, inject, or fibers"]
  host -. "process boundary" .-> boundary
  boundary -. "process boundary" .-> client

  classDef hostNode fill:#e8efff,stroke:#6f96ed,color:#16233a,stroke-width:1.5px;
  classDef clientNode fill:#f7f9fc,stroke:#7991b4,color:#16233a,stroke-width:1.5px;
  classDef terminalNode fill:#16233a,stroke:#16233a,color:#ffffff,stroke-width:1.5px;
  classDef note fill:#fff8e8,stroke:#d8a642,color:#5d4315,stroke-dasharray:4 3;
  class base,acp,runner hostNode;
  class transport,tree,services,painter clientNode;
  class terminal terminalNode;
  class boundary note;