프로덕션 LangChain 에이전트의 비용 제어를 위한 실시간 과금 라이브러리 AgentBill

from agentbill import meter, BudgetExhaustedError

@meter(event="research_run", customer_id_from="customer_id", preflight=True)
async def run_agent(customer_id: str, query: str) -> str:
    chain = prompt | llm | parser
    return await chain.ainvoke({"query": query})

@meter(
    event="ticket_resolved",
    customer_id_from="customer_id",
    units=lambda result: 5 if result["resolved"] else 0
)
async def resolve_ticket(customer_id: str, ticket_id: str) -> dict:
    ...