digraph Hello {
    graph [goal="Say hello and demonstrate a basic arc workflow"]
    rankdir=LR

    start [shape=Mdiamond, label="Start"]
    exit  [shape=Msquare, label="Exit"]

    greet [label="Greet", prompt="Say hello! Introduce yourself and explain that this is a test of the arc workflow engine."]

    start -> greet -> exit
}