digraph BuildSolitaire {
    graph [
        goal="Build a terminal-based solitaire (Klondike) game in Python",
        rankdir=LR,
        default_max_retry=3,
        retry_target="impl_setup",
        fallback_retry_target="impl_logic",
        model_stylesheet="
            *       { llm_model: claude-sonnet; llm_provider: anthropic; }
            .hard   { llm_model: claude-opus;   llm_provider: anthropic; }
            .verify { llm_model: claude-haiku;  llm_provider: anthropic; }
        "
    ]

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

    // Phase 0: Expand the goal into a detailed spec
    expand_spec [
        label="Expand Spec",
        prompt="Expand the goal into a detailed spec covering:\n\
            - Game rules and data structures (Card, Deck, Pile types)\n\
            - Terminal rendering approach (curses library)\n\
            - Input handling and move validation\n\
            - Win/loss detection\n\
            - UI layout\n\
            - Test strategy\n\n\
            Write the spec to spec.md."
    ]

    // Phase 1: Project setup
    impl_setup [
        label="Setup Project",
        prompt="Read spec.md. Create the Python project structure:\n\
            pyproject.toml, src/ directory, tests/ directory, main.py stub.\n\
            Run: python3 -m py_compile src/*.py"
    ]

    verify_setup [label="Verify Setup", class="verify",
        prompt="Verify project setup: check pyproject.toml exists,\n\
            source directories exist, and files compile without errors.\n\
            Run: python3 -m py_compile src/*.py"
    ]

    check_setup [shape=diamond, label="Setup OK?"]

    // Phase 2: Core data structures
    impl_data [
        label="Data Structures",
        prompt="Read spec.md. Implement Card, Deck, and Pile types\n\
            with unit tests. Run: python3 -m pytest tests/ -v"
    ]

    verify_data [label="Verify Data", class="verify",
        prompt="Verify data structures: build, run tests, check that\n\
            Card, Deck, and Pile types are defined and basic operations work.\n\
            Run: python3 -m pytest tests/ -v"
    ]

    check_data [shape=diamond, label="Data OK?"]

    // Phase 3: Game logic (hardest phase)
    impl_logic [
        label="Game Logic",
        class="hard",
        max_retries=2,
        prompt="Read spec.md and the data structure files.\n\
            Implement Klondike rules: initial deal, move validation,\n\
            auto-complete detection, win condition, undo.\n\
            Write tests for legal/illegal moves, win detection, edge cases.\n\
            Run: python3 -m pytest tests/ -v"
    ]

    verify_logic [label="Verify Logic", class="verify",
        prompt="Verify game logic: run all tests, check move validation,\n\
            win detection, and undo.\n\
            Run: python3 -m pytest tests/ -v"
    ]

    check_logic [shape=diamond, label="Logic OK?"]

    // Phase 4: Terminal UI
    impl_ui [
        label="Terminal UI",
        class="hard",
        max_retries=2,
        prompt="Read spec.md and game logic files.\n\
            Implement terminal UI with curses: card rendering (ASCII art),\n\
            board layout, keyboard input, move selection, help text.\n\
            Run: python3 -m pytest tests/ && python3 -m py_compile src/*.py"
    ]

    verify_ui [label="Verify UI", class="verify",
        prompt="Verify terminal UI: build, run tests, check that\n\
            renderer and input handler exist, game can be instantiated.\n\
            Run: python3 -m pytest tests/"
    ]

    check_ui [shape=diamond, label="UI OK?"]

    // Phase 5: Integration
    impl_integration [
        label="Integrate",
        prompt="Wire up main.py to start the game loop.\n\
            Connect UI input to game logic. Add game over screen,\n\
            help menu, and README with build/run instructions.\n\
            Run: python3 -m pytest tests/"
    ]

    verify_integration [label="Verify Integration", class="verify",
        prompt="Verify integration: build, run all tests, check README\n\
            exists, verify the game starts without errors.\n\
            Run: python3 -m pytest tests/"
    ]

    check_integration [shape=diamond, label="Integration OK?"]

    // Phase 6: Final review (goal gate)
    review [
        label="Final Review",
        class="hard",
        goal_gate=true,
        prompt="Read spec.md in full. Review the complete implementation:\n\
            - All Klondike rules correctly implemented\n\
            - Terminal UI works and is intuitive\n\
            - Tests comprehensive and passing\n\
            - README clear and accurate\n\n\
            Run the full test suite. Write a review to review.md.\n\
            Run: python3 -m pytest tests/ -v"
    ]

    check_review [shape=diamond, label="Review OK?"]

    // Wiring: linear phases with verify-gate loops
    start -> expand_spec -> impl_setup -> verify_setup -> check_setup

    check_setup -> impl_data  [condition="outcome=success"]
    check_setup -> impl_setup [condition="outcome=fail", label="Retry"]
    check_setup -> impl_setup

    impl_data -> verify_data -> check_data

    check_data -> impl_logic [condition="outcome=success"]
    check_data -> impl_data  [condition="outcome=fail", label="Retry"]
    check_data -> impl_data

    impl_logic -> verify_logic -> check_logic

    check_logic -> impl_ui    [condition="outcome=success"]
    check_logic -> impl_logic [condition="outcome=fail", label="Retry"]
    check_logic -> impl_logic

    impl_ui -> verify_ui -> check_ui

    check_ui -> impl_integration [condition="outcome=success"]
    check_ui -> impl_ui          [condition="outcome=fail", label="Retry"]
    check_ui -> impl_ui

    impl_integration -> verify_integration -> check_integration

    check_integration -> review           [condition="outcome=success"]
    check_integration -> impl_integration [condition="outcome=fail", label="Retry"]
    check_integration -> impl_integration

    review -> check_review

    check_review -> exit    [condition="outcome=success"]
    check_review -> impl_ui [condition="outcome=fail", label="Fix"]
    check_review -> impl_ui
}