digraph Check {
    graph [goal="Run tests for $repo_name"]

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

    clone [label="Clone", shape=parallelogram, script="git clone $repo_url repo"]
    test  [label="Test", prompt="Run the $language test suite in the repo/ directory."]

    start -> clone -> test -> exit
}