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feat(livekit-plugins-google): structured responses for Live API tool calls #1

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feat(livekit-plugins-google): structured responses for Live API tool calls #1

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6e98e7f
feat: allow structured tool responses
vsomayaji Jun 30, 2025
c1ab4e3
do not respond if there i no output
vsomayaji Jul 1, 2025
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11 changes: 9 additions & 2 deletions livekit-plugins/livekit-plugins-google/livekit/plugins/google/utils.py
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
from __future__ import annotations

import ast
import re
from copy import deepcopy
from typing import Any
Expand Down Expand Up @@ -83,16 +84,22 @@ def get_tool_results_for_realtime(
) -> types.LiveClientToolResponse | None:
function_responses: list[types.FunctionResponse] = []
for msg in chat_ctx.items:
if msg.type == "function_call_output":
# If there is no output, skip the message.
if msg.type == "function_call_output" and msg.output:
res = types.FunctionResponse(
name=msg.name,
response={"output": msg.output},
# LiveKit sets output to the string representation of the tool's
# return value, but the Live API expects the actual value.
# https://ai.google.dev/gemini-api/docs/live-tools#function-calling
response=ast.literal_eval(msg.output),
scheduling=types.FunctionResponseScheduling.SILENT,
)
if not vertexai:
# vertexai does not support id in FunctionResponse
# see: https://github.com/googleapis/python-genai/blob/85e00bc/google/genai/_live_converters.py#L1435
res.id = msg.call_id
function_responses.append(res)
logger.debug("get_tool_results_for_realtime: function_responses=%s", function_responses)
return (
types.LiveClientToolResponse(function_responses=function_responses)
if function_responses
Expand Down