BREAKING CHANGE(vercel-ai-sdk): migrate to Vercel AI SDK v6 and introduce provider registry (getModel) returning LanguageModelV3

ts_audio/index.ts

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+import * as plugins from './plugins.js';
+import { Readable } from 'stream';
+
+export interface IOpenAiTtsOptions {
+  apiKey: string;
+  text: string;
+  voice?: 'alloy' | 'echo' | 'fable' | 'onyx' | 'nova' | 'shimmer';
+  model?: 'tts-1' | 'tts-1-hd';
+  responseFormat?: 'mp3' | 'opus' | 'aac' | 'flac';
+  speed?: number;
+}
+
+export async function textToSpeech(options: IOpenAiTtsOptions): Promise<NodeJS.ReadableStream> {
+  const client = new plugins.OpenAI({ apiKey: options.apiKey });
+  const result = await client.audio.speech.create({
+    model: options.model ?? 'tts-1',
+    voice: options.voice ?? 'alloy',
+    input: options.text,
+    response_format: options.responseFormat ?? 'mp3',
+    speed: options.speed ?? 1,
+  });
+  const stream = result.body;
+  return Readable.fromWeb(stream as any);
+}

ts_audio/plugins.ts

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+import OpenAI from 'openai';
+export { OpenAI };