export type DeepgramSttOptions = {
    apiKey: string;
    /** Default `nova-3`. */
    model?: string;
    /** Language code for transcription (default `multi` so Spanish + English work). */
    language?: string;
    /** Default `https://api.deepgram.com`. */
    baseUrl?: string;
    /** Sample rate of the PCM we'll send (default 8000 for telephony, 48000 for Discord). */
    sampleRateHz?: number;
};
export type DeepgramSttEvents = {
    /** Final (utterance-complete) transcript. */
    final: (transcript: string) => void | Promise<void>;
    /** Interim partial transcript (every word, fast). */
    partial: (transcript: string) => void | Promise<void>;
    /** WS open. */
    open: () => void | Promise<void>;
    /** WS closed normally. */
    close: (code: number, reason: string) => void | Promise<void>;
    /** Adapter or WS error. */
    error: (err: Error) => void | Promise<void>;
};
export type DeepgramSttSession = {
    send: (pcmSamples: Int16Array) => void;
    finish: () => Promise<void>;
    on: <K extends keyof DeepgramSttEvents>(event: K, handler: DeepgramSttEvents[K]) => () => void;
};
/**
 * Open a Deepgram listen WebSocket. Caller pumps in 8 kHz linear16 frames via
 * `send()` and consumes `final` transcripts to drive the next LLM turn.
 */
export declare const openDeepgramStt: (options: DeepgramSttOptions) => DeepgramSttSession;
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