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fix(core): reset user away timer on final STT transcript AGT-3149 #6478

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Merged
chenghao-mou merged 1 commit into from
Jul 18, 2026
+36 −3
Merged

fix(core): reset user away timer on final STT transcript AGT-3149 #6478

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10 changes: 7 additions & 3 deletions livekit-agents/livekit/agents/voice/agent_session.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1820,9 +1820,13 @@ def _user_input_transcribed(self, ev: UserInputTranscribedEvent) -> None:
# a transcript means stt recovered; reset its error tolerance
self._stt_error_counts = 0

if self.user_state == "away" and ev.is_final:
# reset user state from away to listening in case VAD has a miss detection
self._update_user_state("listening")
if ev.is_final and self.user_state != "speaking":
if self.user_state == "away":
# reset user state from away to listening in case VAD has a miss detection
self._update_user_state("listening")
elif self.user_state == "listening" and self._agent_state == "listening":
# VAD may have missed speech; STT still saw activity, so refresh away timeout
self._set_user_away_timer()

self.emit("user_input_transcribed", ev)

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29 changes: 29 additions & 0 deletions tests/test_agent_session.py
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Expand Up @@ -1158,6 +1158,35 @@ def _stt_error() -> STTError:
await _close_test_session(session)


async def test_final_transcript_resets_away_timer_when_not_speaking() -> None:
session = create_session(FakeActions(), extra_kwargs={"user_away_timeout": 15.0})
try:
session._agent_state = "listening"
session._user_state = "listening"

with patch.object(session, "_set_user_away_timer") as set_timer:
session._user_input_transcribed(
UserInputTranscribedEvent(transcript="hello", is_final=True)
)
set_timer.assert_called_once()
assert session.user_state == "listening"

with patch.object(session, "_set_user_away_timer") as set_timer:
session._user_input_transcribed(
UserInputTranscribedEvent(transcript="hello", is_final=False)
)
set_timer.assert_not_called()

session._user_state = "speaking"
with patch.object(session, "_set_user_away_timer") as set_timer:
session._user_input_transcribed(
UserInputTranscribedEvent(transcript="hello", is_final=True)
)
set_timer.assert_not_called()
finally:
await _close_test_session(session)


async def test_stt_error_count_resets_on_user_transcript() -> None:
from livekit.agents.voice.agent_session import SessionConnectOptions

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