async def parallel_handoffs(source: 'Agent', targets: List[tuple], max_concurrent: int, config: Optional[HandoffConfig]) -> List['HandoffResult']

results = await parallel_handoffs(
        source=main_agent,
        targets=[
            (research_agent, "Research topic X"),
            (analysis_agent, "Analyze data Y"),
            (summary_agent, "Summarize findings Z")
        ],
        max_concurrent=3
    )