产品 发布 Planner

def build_launch_plan(product_name, launch_date):
    from datetime import timedelta
    tasks = [
        {'task': 'Finalize product', 'deadline': launch_date - timedelta(days=14)},
        {'task': 'Create listings', 'deadline': launch_date - timedelta(days=7)},
        {'task': 'Prepare marketing', 'deadline': launch_date - timedelta(days=3)},
        {'task': 'Launch day', 'deadline': launch_date},
    ]
    return tasks