async def run_dev_agent(spec: dict, qa_feedback: list = None) -> dict:
    """
    Agent Dev minimal :
    - retourne une pseudo arborescence + un code exemple
    """
    return {
        "tree": [
            "main.py",
            "README.md",
            "app/__init__.py",
        ],
        "code": 'print("Hello from ARC generated project")',
        "spec_title": spec.get("title"),
    }