digraph ImplementAndTest {
    graph [goal="Implement the plan and make tests pass"]
    rankdir=LR

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

    implement [label="Implement", prompt="Read plan.md and implement every step. Write the code and tests to disk."]
    validate  [label="Validate", shape=parallelogram, script="python3 -m pytest -v 2>&1 || true"]
    gate      [shape=diamond, label="Tests passing?"]

    start -> implement -> validate -> gate
    gate -> exit      [label="Pass", condition="outcome=success"]
    gate -> implement [label="Fix", max_visits=5]
}