Mock 快速接入

对应示例：examples/node-cli

Mock 与真实 Provider 共享同一套事件协议，UI 只需写一套逻辑。

import {
  createMockASR,
  createMockLLM,
  createMockRuntime,
  createMockTTS,
  createVoiceSession,
} from '@ottervoice/core';

const runtime = createMockRuntime();
const session = createVoiceSession({
  mode: 'half_duplex',
  runtime,
  providers: {
    asr: createMockASR({ transcripts: ['Hello Otter'] }),
    llm: createMockLLM({ reply: () => 'Hello! How can I help?' }),
    tts: createMockTTS(),
  },
});

session.on('asr_partial', ({ text }) => console.log('user:', text));
session.on('assistant_text_delta', ({ text }) => console.log('assistant:', text));

await session.start();

// 向 mock 输入推一条假音频分片，触发 ASR → LLM → TTS
runtime.audioInput.emitChunk({
  data: new ArrayBuffer(8),
  timestamp: Date.now(),
  durationMs: 800,
});

运行：

bun run demo
# 等同于 bun run examples/node-cli/index.ts

生产环境只替换 runtime 与 providers，Session 与事件订阅保持不变。