/** Number of bars rendered in the dictation waveform strip. */
export declare const ATHENA_CHAT_DICTATION_BARS = 28;
/** Result of {@link useAthenaChatDictation}. */
export interface AthenaChatDictation {
    /** Discards the in-progress transcript and releases the microphone. */
    cancel: () => void;
    /** Commits the transcript through `onTranscript` and stops listening. */
    confirm: () => void;
    isListening: boolean;
    /** False when the Web Speech API is unavailable, including during SSR. */
    isSupported: boolean;
    /** Normalised 0–1 microphone levels, newest last. */
    levels: number[];
    start: () => void;
    toggle: () => void;
    transcript: string;
}
/**
 * Browser speech-to-text with live microphone metering.
 *
 * Entirely independent of the chat transport — it produces text and nothing
 * else, so it composes with any composer. The transcript is held locally while
 * dictating so it can be discarded or committed deliberately, rather than
 * streaming half-formed words into a live conversation.
 *
 * Degrades to `isSupported: false` when the Web Speech API is missing, which
 * includes every server render, so callers can hide the control without a
 * hydration mismatch.
 */
export declare function useAthenaChatDictation(onTranscript: (text: string) => void): AthenaChatDictation;