- Added `RealtimeServiceMetadataFrame`, broadcast at pipeline start by realtime LLM services (OpenAI Realtime, Azure Realtime, Inworld, Grok/xAI Realtime, Gemini Live, AWS Nova Sonic, Ultravox). The context aggregator pair listens for it and, when `realtime_service_mode` isn't configured, logs a one-time INFO recommendation pointing users at the option and the `on_user_turn_stopped` timing change it implies.