- Ear button activates conversation mode (green dot) - After TTS playback finishes → 800ms pause → auto-start recording - VAD stops recording on silence → sends to ARIA → ARIA answers → TTS → loop - Like a natural conversation / walkie-talkie mode - Audio service fires onPlaybackFinished when queue empty Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>