pipecat/changelog/+realtime-service-mode-config.added.md

• Added RealtimeServiceModeConfig and a new realtime_service_mode kwarg on LLMContextAggregatorPair, opting the pair into realtime (speech-to-speech) LLM behavior. When set, user messages are written to context when the assistant response starts rather than on user-turn-end frames — so context stays correct even when the realtime service emits no turn frames at all — and, by default, turn-end strategies stop waiting for transcripts before signalling end-of-turn, keeping transcript latency off the critical path in local-VAD-driven realtime pipelines. Both behaviors are individually controllable via the context_writes_await_turns and turns_await_transcripts fields. Cascade (non-realtime) behavior is unchanged when the kwarg is omitted.