OptionalllmOverride the default ai-sdk LanguageModel. Defaults to openai("gpt-5.4-mini").
OptionalsttPlug an alternate STT — defaults to ElevenLabsSTTProvider.
OptionalsystemOverride the system prompt. Defaults to ComposableVoiceAgent.DEFAULT_SYSTEM_PROMPT.
OptionalttsTest seam — forwarded to the underlying synthesize helper.
OptionalvoiceTTS voice string in "elevenlabs/<voiceId>" form. Defaults to the
ELEVENLABS_VOICE_ID env var when set, otherwise to
elevenlabs/EXAVITQu4vr4xnSDxMaL (Sarah).
Provider-specific signatures —
api_keyis required, every other knob is an optional override with an EL-opinionated default.