Local STT and TTS on macOS using native Apple capabilities. Speech-to-text via yap (Apple Speech.framework), text-to-speech via say + ffmpeg. Fully offline, no API keys required. Includes voice quality detection and smart voice selection.
Initial release: Node.js rewrite. STT (yap) + TTS (say) + voice detection (JXA/AVFoundation). Fully offline, no API keys.