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In AWS Nova Sonic service, send the "interactive" user message (which triggers the bot response) only after sending the audio input start event, per the AWS team's recommendation

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Paul Kompfner
2026-01-16 22:43:49 -05:00
parent b4d143e39b
commit 06b3ecd2d6
1 changed files with 16 additions and 7 deletions
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23
src/pipecat/services/aws/nova_sonic/llm.py
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@@ -533,21 +533,30 @@ class AWSNovaSonicLLMService(LLMService):
if system_instruction:
await self._send_text_event(text=system_instruction, role=Role.SYSTEM)
# Send conversation history
# Send conversation history (except for the last message if it's from the
# user, which we'll send as interactive after starting audio input)
messages = llm_connection_params["messages"]
last_user_message = None
for i, message in enumerate(messages):
# logger.debug(f"Seeding conversation history with message: {message}")
# If last message is from user, mark it as interactive to trigger
# bot response
is_last_message = i == len(messages) - 1
interactive = is_last_message and message.role == Role.USER
await self._send_text_event(
text=message.text, role=message.role, interactive=interactive
)
if is_last_message and message.role == Role.USER:
# Save for sending after audio input starts
last_user_message = message
else:
await self._send_text_event(text=message.text, role=message.role)
# Start audio input
await self._send_audio_input_start_event()
# Now send the last user message as interactive to trigger bot response
if last_user_message:
# logger.debug(
# f"Sending last user message as interactive to trigger bot response: {last_user_message}")
await self._send_text_event(
text=last_user_message.text, role=last_user_message.role, interactive=True
)
# Start receiving events
self._receive_task = self.create_task(self._receive_task_handler())