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pipecat/changelog/3045.added.md
2025-12-30 14:33:58 -08:00

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- Introducing user turn strategies. User turn strategies indicate when the user turn starts or stops. In conversational agents, these are often referred to as start/stop speaking or turn-taking plans or policies.
User turn start strategies indicate when the user starts speaking (e.g. using VAD events or when a user says one or more words).
User turn stop strategies indicate when the user stops speaking (e.g. using an end-of-turn detection model or by observing incoming transcriptions).
A list of strategies can be specified for both strategies; strategies are evaluated in order until one evaluates to true.
Available user turn start strategies:
- VADUserTurnStartStrategy
- TranscriptionUserTurnStartStrategy
- MinWordsUserTurnStartStrategy
- ExternalUserTurnStartStrategy
Available user turn stop strategies:
- TranscriptionUserTurnStopStrategy
- TurnAnalyzerUserTurnStopStrategy
- ExternalUserTurnStopStrategy
The default strategies are:
- start: [VADUserTurnStartStrategy, TranscriptionUserTurnStartStrategy]
- stop: [TranscriptionUserTurnStopStrategy]
Turn strategies are configured when setting up `LLMContextAggregatorPair`. For example:
```python
context_aggregator = LLMContextAggregatorPair(
context,
user_params=LLMUserAggregatorParams(
user_turn_strategies=UserTurnStrategies(
stop=[
TurnAnalyzerUserTurnStopStrategy(
turn_analyzer=LocalSmartTurnAnalyzerV3(params=SmartTurnParams())
)
],
)
),
)
```
In order to use the user turn strategies you must update to the new universal `LLMContext` and `LLMContextAggregatorPair`.