/**
 * Portal / Web hold-to-talk STT — wrap core `transcribe()` for HTTP uploads.
 *
 * Writes the raw audio blob to a temp file (Whisper needs a path + extension),
 * runs the configured provider, then deletes the temp file.
 */
import { type TranscribeProvider, type TranscribeResult } from './transcribe.js';
/** ~60s of opus/webm or aac/mp4 at conversational bitrate. */
export declare const CHAT_TRANSCRIBE_MAX_BYTES: number;
export declare function extensionForAudioMime(mime: string, filename?: string): string;
export declare function transcribeChatAudio(opts: {
    body: Buffer;
    mime?: string;
    filename?: string;
    language?: string;
}): Promise<TranscribeResult>;
export declare function isTranscribeConfigured(): boolean;
export type { TranscribeProvider, TranscribeResult };
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