digraph implement {
    graph [
        goal="",
        label="Implement"
    ]
    rankdir=LR

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

    strategy [shape=hexagon, label="Choose decomposition strategy:"]

    subgraph cluster_impl {
        label="Implementation Loop"
        node [fidelity="full", thread_id="impl"]

        plan      [label="Plan Implementation", prompt="@prompts/implement/plan.md", reasoning_effort="high"]
        implement [label="Implement",            prompt="@prompts/implement/implement.md"]
        review    [label="Review",               prompt="@prompts/implement/review.md"]
        validate  [label="Validate",             prompt="@prompts/implement/validate.md", goal_gate=true]
        fix       [label="Fix Failures",         prompt="@prompts/implement/fix.md", max_visits=3]
    }

    start -> strategy
    strategy -> plan [label="[L] Layer-by-layer"]
    strategy -> plan [label="[F] Feature slice"]
    strategy -> plan [label="[P] Embarrassingly parallel"]
    strategy -> plan [label="[S] Sequential / linear"]
    plan -> implement -> review -> validate
    validate -> exit [condition="outcome=success"]
    validate -> fix  [condition="outcome!=success", label="Fix"]
    fix -> validate
}