update_instructions

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from signalwire.livewire import Agent, AgentSession, AgentServer, JobContext, function_tool, run_app
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@function_tool
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def escalate() -> str:
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    """Escalate to a senior agent."""
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    return "Escalating now."
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server = AgentServer()
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@server.rtc_session()
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async def entrypoint(ctx: JobContext):
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    await ctx.connect()
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    agent = Agent(
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        instructions="You are a junior support agent. Help with basic questions.",
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        tools=[escalate],
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    )
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    session = AgentSession()
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    await agent.update_instructions("You are now a senior support agent. Handle complex issues.")
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    await session.start(agent, room=ctx.room)
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run_app(server)