add sms verification example

[vipyne]

A Pipecat voice agent that sends a 6-digit SMS verification code, asks the
caller to read the digits back, and confirms or rejects the match. Runs in two
modes from a single bot file; Browser mode & Phone mode. Both modes send
an actual SMS message via Twilio.

[markbackman]

Nice! Few comments on ways to simplify this code and align with other example patterns.

[markbackman]

Rather than have two entry points, we should have a single bot() method, which is required to be Pipecat Cloud compatible.

Once 1.4.0 is available, you'll be able to replace L292-L337 with:

async def bot(runner_args: RunnerArguments):
    """Main bot entry point."""

    transport_params = {
        "webrtc": lambda: TransportParams(
            audio_in_enabled=True,
            audio_out_enabled=True,
        ),
        # create_transport sets the twilio serializer and add_wav_header automatically.
        "twilio": lambda: FastAPIWebsocketParams(
            audio_in_enabled=True,
            audio_out_enabled=True,
        ),
    }

    transport = await create_transport(runner_args, transport_params)

    await run_bot(transport, runner_args)

if __name__ == "__main__":
    from pipecat.runner.run import main

    main()

Note the main being imported from pipecat.runner.run. This is the pattern in all examples. It's the local development runner, which runs a FastAPI server at port 7860. This does magic which simulates things that Pipecat Cloud does. It also makes local dev much easier. This allows you to remove most (maybe all) of what's in server.py.

Then, you can get access to the caller info via:

call_data = runner_args.call_data
call_info = await get_call_info(call_data.call_id) if call_data else None
if call_info:
    logger.info(f"Call from: {call_info.from_number} to: {call_info.to_number}")

[markbackman]

You'll want 1.4.0 for the simplification I mentioned:

Suggested change

	"pipecat-ai[websocket,webrtc,cartesia,google,openai,silero,deepgram,runner]>=1.0.0",
	"pipecat-ai[websocket,webrtc,cartesia,google,openai,silero,deepgram,runner]>=1.4.0",

[markbackman]

You can simplify since these are already installed by Pipecat:

    "fastapi>=0.115.0",
    "python-dotenv>=1.0.1",
    "aiohttp>=3.10.0",
    "uvicorn[standard]>=0.32.0",

• aiohttp is installed by pipecat-ai
• fastapi is installed by pipecat-ai[websocket]
• python-dotenv and uvicorn are installed by pipecat-ai[runner]

[markbackman]

Just for conformance, we're using modern Python syntax everywhere now:

Suggested change

	select = ["I"]
	select = ["I" , "UP"]

[markbackman]

You shouldn't need this either. It's done by the runner.run. It exposes a /ws endpoint.

[markbackman]

You shouldn't need this.

[markbackman]

You shouldn't need this.

[markbackman]

I'm not sure what this is, but seems unique to this demo, so you probably need this :)