/**
 * Zhipu / GLM audio transcription (GLM-ASR-2512).
 * Docs: https://docs.bigmodel.cn/api-reference/模型-api/语音转文本
 *
 * Env:
 *   AGIM_ZHIPU_API_KEY              — required (open.bigmodel.cn API Key)
 *   AGIM_ZHIPU_BASE_URL             — optional, default https://open.bigmodel.cn/api/paas/v4
 *   AGIM_ZHIPU_TRANSCRIBE_MODEL     — optional, default glm-asr-2512
 *
 * Limits (vendor): .wav / .mp3, ≤25 MB, ≤30 s. We convert to 16 kHz WAV.
 */
export declare function isGlmSpeechConfigured(): boolean;
export declare function transcribeWithGlm(filePath: string, _opts?: {
    language?: string;
}): Promise<string>;
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