Voice Agent

final session = await RunAnywhere.voice.createSession(
  stt: ModelRef('whisper-base'),
  llm: ModelRef('qwen3-0.6b'),
  tts: ModelRef('piper-en-amy'),
);

await session.start();

Future<VoiceSession> createSession({
  required ModelRef stt,
  required ModelRef llm,
  required ModelRef tts,
  VadOptions? vad,
  TurnHandlingOptions? turnHandling,
  LlmOptions? generation,
  bool downloadIfNeeded = true,
})

Future<void> start()
SpeechHandle say(String text)      // synchronous
Future<void> interrupt()
Future<void> close()

final session = await RunAnywhere.voice.createSession(
  stt: ModelRef('whisper-base'),
  llm: ModelRef('qwen3-0.6b'),
  tts: ModelRef('piper-en-amy'),
  turnHandling: TurnHandlingOptions(
    endpointing: Endpointing(minDelayMs: 500, maxDelayMs: 3000),
    interruption: Interruption(enabled: true, minDurationMs: 500),
  ),
);

generation: LlmOptions(
  systemPrompt: 'You are a voice assistant. Answer in one or two sentences.',
  maxOutputTokens: 100,
),

class VoiceScreen extends StatefulWidget {
  const VoiceScreen({super.key});

  @override
  State<VoiceScreen> createState() => _VoiceScreenState();
}

class _VoiceScreenState extends State<VoiceScreen> with WidgetsBindingObserver {
  VoiceSession? _session;
  bool _running = false;

  @override
  void initState() {
    super.initState();
    WidgetsBinding.instance.addObserver(this);
  }

  Future<void> _start() async {
    final session = await RunAnywhere.voice.createSession(
      stt: ModelRef('whisper-base'),
      llm: ModelRef('qwen3-0.6b'),
      tts: ModelRef('piper-en-amy'),
      generation: LlmOptions(
        systemPrompt: 'Answer in one or two sentences.',
        maxOutputTokens: 100,
      ),
    );

    _session = session;
    await session.start();
    session.say('Hello. What can I help with?');
    if (mounted) setState(() => _running = true);
  }

  Future<void> _stop() async {
    await _session?.close();
    _session = null;
    if (mounted) setState(() => _running = false);
  }

  @override
  void didChangeAppLifecycleState(AppLifecycleState state) {
    if (state != AppLifecycleState.resumed) _stop();
  }

  @override
  void dispose() {
    WidgetsBinding.instance.removeObserver(this);
    _session?.close();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Center(
      child: ElevatedButton(
        onPressed: _running ? _stop : _start,
        child: Text(_running ? 'Stop' : 'Start'),
      ),
    );
  }
}

final result = await RunAnywhere.diarization.diarize(audio);