[fix] remove id field to align with v1 of google

[TheAli711]

The Issue

livekit-google-plugin by default uses v1beta1 routes,we pass id in function_call and function_response structure, which v1beta1 route accepts But when we switch to v1 routes, they dont accet it and we get the following error

2025-11-12 15:09:59,888 - INFO livekit.agents - LLM metrics {"model_name": "gemini-2.5-flash", "model_provider": "Vertex AI", "ttft": 1.6, "prompt_tokens": 39, "prompt_cached_tokens": 0, "completion_tokens": 5, "tokens_per_second": 3.0, "pid": 339759, "job_id": "AJ_KdqHszSN4KCf"}
2025-11-12 15:09:59,889 - DEBUG livekit.agents - executing tool {"function": "get_current_time", "arguments": "{}", "speech_id": "speech_a605a9406d6e", "pid": 339759, "job_id": "AJ_KdqHszSN4KCf"}
2025-11-12 15:09:59,890 - DEBUG livekit.agents - tools execution completed {"speech_id": "speech_a605a9406d6e", "pid": 339759, "job_id": "AJ_KdqHszSN4KCf"}
2025-11-12 15:09:59,892 - INFO google_genai.models - AFC is enabled with max remote calls: 10. {"pid": 339759, "job_id": "AJ_KdqHszSN4KCf"}
2025-11-12 15:10:00,845 - ERROR livekit.agents - Error in _llm_inference_task
Traceback (most recent call last):
  File "/home/ali/dev/livekit/venv/lib/python3.12/site-packages/livekit/plugins/google/llm.py", line 353, in _run
    async for response in stream:
  File "/home/ali/dev/livekit/venv/lib/python3.12/site-packages/google/genai/models.py", line 7569, in async_generator
    response = await self._generate_content_stream(
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ali/dev/livekit/venv/lib/python3.12/site-packages/google/genai/models.py", line 6476, in _generate_content_stream
    response_stream = await self._api_client.async_request_streamed(
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ali/dev/livekit/venv/lib/python3.12/site-packages/google/genai/_api_client.py", line 1116, in async_request_streamed
    response = await self._async_request(http_request=http_request, stream=True)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ali/dev/livekit/venv/lib/python3.12/site-packages/google/genai/_api_client.py", line 1046, in _async_request
    return await self._async_retry(  # type: ignore[no-any-return]
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ali/dev/livekit/venv/lib/python3.12/site-packages/tenacity/asyncio/__init__.py", line 111, in __call__
    do = await self.iter(retry_state=retry_state)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ali/dev/livekit/venv/lib/python3.12/site-packages/tenacity/asyncio/__init__.py", line 153, in iter
    result = await action(retry_state)
             ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ali/dev/livekit/venv/lib/python3.12/site-packages/tenacity/_utils.py", line 99, in inner
    return call(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/home/ali/dev/livekit/venv/lib/python3.12/site-packages/tenacity/__init__.py", line 418, in exc_check
    raise retry_exc.reraise()
          ^^^^^^^^^^^^^^^^^^^
  File "/home/ali/dev/livekit/venv/lib/python3.12/site-packages/tenacity/__init__.py", line 185, in reraise
    raise self.last_attempt.result()
          ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/concurrent/futures/_base.py", line 449, in result
    return self.__get_result()
           ^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/concurrent/futures/_base.py", line 401, in __get_result
    raise self._exception
  File "/home/ali/dev/livekit/venv/lib/python3.12/site-packages/tenacity/asyncio/__init__.py", line 114, in __call__
    result = await fn(*args, **kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ali/dev/livekit/venv/lib/python3.12/site-packages/google/genai/_api_client.py", line 996, in _async_request_once
    await errors.APIError.raise_for_async_response(response)
  File "/home/ali/dev/livekit/venv/lib/python3.12/site-packages/google/genai/errors.py", line 155, in raise_for_async_response
    raise ClientError(status_code, response_json, response)
google.genai.errors.ClientError: 400 Bad Request. {'message': '{\n  "error": {\n    "code": 400,\n    "message": "Invalid JSON payload received. Unknown name \\"id\\" at \'contents[1].parts[0].function_call\': Cannot find field.\\nInvalid JSON payload received. Unknown name \\"id\\" at \'contents[2].parts[0].function_response\': Cannot find field.",\n    "status": "INVALID_ARGUMENT",\n    "details": [\n      {\n        "@type": "type.googleapis.com/google.rpc.BadRequest",\n        "fieldViolations": [\n          {\n            "field": "contents[1].parts[0].function_call",\n            "description": "Invalid JSON payload received. Unknown name \\"id\\" at \'contents[1].parts[0].function_call\': Cannot find field."\n          },\n          {\n            "field": "contents[2].parts[0].function_response",\n            "description": "Invalid JSON payload received. Unknown name \\"id\\" at \'contents[2].parts[0].function_response\': Cannot find field."\n          }\n        ]\n      }\n    ]\n  }\n}\n', 'status': 'Bad Request'}

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/home/ali/dev/livekit/venv/lib/python3.12/site-packages/livekit/agents/utils/log.py", line 16, in async_fn_logs
    return await fn(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ali/dev/livekit/venv/lib/python3.12/site-packages/opentelemetry/util/_decorator.py", line 71, in async_wrapper
    return await func(*args, **kwargs)  # type: ignore
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ali/dev/livekit/venv/lib/python3.12/site-packages/livekit/agents/voice/generation.py", line 125, in _llm_inference_task
    async for chunk in llm_node:
  File "/home/ali/dev/livekit/venv/lib/python3.12/site-packages/livekit/agents/voice/agent.py", line 402, in llm_node
    async for chunk in stream:
  File "/home/ali/dev/livekit/venv/lib/python3.12/site-packages/livekit/agents/llm/llm.py", line 344, in __anext__
    raise exc  # noqa: B904
    ^^^^^^^^^
  File "/home/ali/dev/livekit/venv/lib/python3.12/site-packages/opentelemetry/util/_decorator.py", line 71, in async_wrapper
    return await func(*args, **kwargs)  # type: ignore
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ali/dev/livekit/venv/lib/python3.12/site-packages/livekit/agents/llm/llm.py", line 190, in _main_task
    return await self._run()
           ^^^^^^^^^^^^^^^^^
  File "/home/ali/dev/livekit/venv/lib/python3.12/site-packages/livekit/plugins/google/llm.py", line 395, in _run
    raise APIStatusError(
livekit.agents._exceptions.APIStatusError: gemini llm: client error (status_code=400, request_id=a18dad7d36dd, body={
  "error": {
    "code": 400,
    "message": "Invalid JSON payload received. Unknown name \"id\" at 'contents[1].parts[0].function_call': Cannot find field.\nInvalid JSON payload received. Unknown name \"id\" at 'contents[2].parts[0].function_response': Cannot find field.",
    "status": "INVALID_ARGUMENT",
    "details": [
      {
        "@type": "type.googleapis.com/google.rpc.BadRequest",
        "fieldViolations": [
          {
            "field": "contents[1].parts[0].function_call",
            "description": "Invalid JSON payload received. Unknown name \"id\" at 'contents[1].parts[0].function_call': Cannot find field."
          },
          {
            "field": "contents[2].parts[0].function_response",
            "description": "Invalid JSON payload received. Unknown name \"id\" at 'contents[2].parts[0].function_response': Cannot find field."
          }
        ]
      }
    ]
  }
}
 Bad Request, retryable=False) {"pid": 339759, "job_id": "AJ_KdqHszSN4KCf"}

If we remove id from the payload, it works for both v1 and v1beta1 routes

2025-11-12 15:33:03,194 - DEBUG livekit.agents - executing tool {"function": "get_current_time", "arguments": "{}", "speech_id": "speech_129d7c5ea983", "pid": 344547, "job_id": "AJ_Jruwgtd7py23"}
2025-11-12 15:33:03,195 - DEBUG livekit.agents - tools execution completed {"speech_id": "speech_129d7c5ea983", "pid": 344547, "job_id": "AJ_Jruwgtd7py23"}
2025-11-12 15:33:03,197 - INFO google_genai.models - AFC is enabled with max remote calls: 10. {"pid": 344547, "job_id": "AJ_Jruwgtd7py23"}
2025-11-12 15:33:04,513 - INFO google_genai.models - AFC remote call 1 is done. {"pid": 344547, "job_id": "AJ_Jruwgtd7py23"}
get_current_time called
2025-11-12 15:33:04,518 - INFO livekit.agents - LLM metrics {"model_name": "gemini-2.5-flash", "model_provider": "Vertex AI", "ttft": 1.32, "prompt_tokens": 70, "prompt_cached_tokens": 0, "completion_tokens": 5, "tokens_per_second": 3.78, "pid": 344547, "job_id": "AJ_Jruwgtd7py23"}
2025-11-12 15:33:04,519 - DEBUG livekit.agents - executing tool {"function": "get_current_time", "arguments": "{}", "speech_id": "speech_129d7c5ea983", "pid": 344547, "job_id": "AJ_Jruwgtd7py23"}
2025-11-12 15:33:04,519 - DEBUG livekit.agents - tools execution completed {"speech_id": "speech_129d7c5ea983", "pid": 344547, "job_id": "AJ_Jruwgtd7py23"}
2025-11-12 15:33:04,521 - INFO google_genai.models - AFC is enabled with max remote calls: 10. {"pid": 344547, "job_id": "AJ_Jruwgtd7py23"}
2025-11-12 15:33:05,906 - INFO google_genai.models - AFC remote call 1 is done. {"pid": 344547, "job_id": "AJ_Jruwgtd7py23"}
2025-11-12 15:33:06,012 - DEBUG livekit.agents - http_session(): creating a new httpclient ctx {"pid": 344547, "job_id": "AJ_Jruwgtd7py23"}
2025-11-12 15:33:06,106 - INFO livekit.agents - LLM metrics {"model_name": "gemini-2.5-flash", "model_provider": "Vertex AI", "ttft": 1.39, "prompt_tokens": 101, "prompt_cached_tokens": 0, "completion_tokens": 41, "tokens_per_second": 25.86, "pid": 344547, "job_id": "AJ_Jruwgtd7py23"}
2025-11-12 15:33:06,106 - DEBUG livekit.agents - generated assistant message id=I'm doing well, thank you for asking! It's currently 10:33 AM on November 12, 2025. How can I help you today? {"pid": 344547, "job_id": "AJ_Jruwgtd7py23"}
2025-11-12 15:33:08,400 - INFO livekit.agents - TTS metrics {"model_name": "mistv2", "model_provider": "Rime", "ttfb": 2.3548044549825136, "audio_duration": 1.8, "pid": 344547, "job_id": "AJ_Jruwgtd7py23"}
2025-11-12 15:33:09,157 - DEBUG livekit.agents - flush audio emitter due to slow audio generation {"pid": 344547, "job_id": "AJ_Jruwgtd7py23"}
2025-11-12 15:33:09,916 - INFO livekit.agents - TTS metrics {"model_name": "mistv2", "model_provider": "Rime", "ttfb": 0.5759212620032486, "audio_duration": 3.58, "pid": 344547, "job_id": "AJ_Jruwgtd7py23"}
2025-11-12 15:33:10,482 - INFO livekit.agents - TTS metrics {"model_name": "mistv2", "model_provider": "Rime", "ttfb": 0.5426903050101828, "audio_duration": 1.23, "pid": 344547, "job_id": "AJ_Jruwgtd7py23"}```