/**
 * Shared utility: infer a `TTSAudioFormat` from a file path.
 *
 * Used by the CLI generate/stream handlers (m2) to set `stt.format` so
 * `STTProcessor.transcribe()` can fail fast on incompatible provider/format
 * combinations (e.g. MP3 to azure-stt). Pulled into a single helper to
 * avoid duplicating the 11-element format list across two CLI handlers.
 */
import type { TTSAudioFormat } from "../types/index.js";
/**
 * Returns the `TTSAudioFormat` that matches the file extension of `path`,
 * or `undefined` when the path is missing or its extension isn't a known
 * audio format. The check is case-insensitive.
 */
export declare function inferAudioFormatFromPath(path: string | undefined): TTSAudioFormat | undefined;