/**
 * Provider-agnostic audio transcription via Vercel AI SDK's
 * `experimental_transcribe`. Drop-in replacement for the classic
 * `Transcriber` (`src/ai/transcriber.ts`) that removes the `openai` SDK peer
 * dependency from the transcription path.
 *
 *   import { AISDKTranscriber } from '@emerleite/wa-agent/ai-sdk';
 *   import { openai } from '@ai-sdk/openai';       // Whisper
 *   // or:
 *   import { deepgram } from '@ai-sdk/deepgram';   // Deepgram
 *   import { elevenlabs } from '@ai-sdk/elevenlabs';
 *   import { rev } from '@ai-sdk/rev';
 *
 *   const transcriber = new AISDKTranscriber({
 *     model: openai.transcription('whisper-1'),
 *   });
 *
 * The public shape matches the classic `Transcriber`: one method,
 * `transcribe(stream) → Promise<string | null>`, returning `null` on any
 * failure so consumers keep the same fail-soft semantics. The class does
 * not use the `openai` npm package at all — only whatever `@ai-sdk/*`
 * provider you configure.
 */
import { type TranscriptionModel } from 'ai';
/** Provider options forwarded to `experimental_transcribe` — provider-specific JSON blob. */
export type TranscriberProviderOptions = Record<string, Record<string, unknown>>;
export interface AISDKTranscriberOptions {
    /**
     * AI SDK transcription model. Common sources:
     *   - `openai.transcription('whisper-1')` — OpenAI Whisper
     *   - `deepgram.transcription('nova-2')`
     *   - `elevenlabs.transcription('scribe_v1')`
     *   - `rev.transcription('machine')`
     */
    model: TranscriptionModel;
    /**
     * Provider-specific options forwarded verbatim to `experimental_transcribe`.
     * Nested by provider key, e.g. `{ openai: { language: 'pt' } }`.
     */
    providerOptions?: TranscriberProviderOptions;
}
export declare class AISDKTranscriber {
    private readonly model;
    private readonly providerOptions?;
    constructor(opts: AISDKTranscriberOptions);
    /**
     * Consume the stream and hand the bytes to the AI SDK transcription
     * model. Returns the text on success or `null` on any failure (network,
     * empty audio, provider error). Matches the classic `Transcriber.transcribe`
     * signature for drop-in replacement.
     */
    transcribe(audio: ReadableStream | Uint8Array | ArrayBuffer | null): Promise<string | null>;
}
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