ai-agent-book 精选快照（<2MB 代码与文档，来自 github.com/bojieli/ai-agent-book）

chapter10/autonomous-phone-registration/env.example

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+# LLM orchestration/extraction plus direct ASR/TTS.
+OPENAI_API_KEY=
+OPENAI_MODEL=gpt-4.1-mini
+OPENAI_ASR_MODEL=whisper-1
+OPENAI_TTS_MODEL=tts-1
+
+# Text-model alternatives. The demo tries configured endpoints in order; ASR/TTS
+# still require a direct audio provider.
+# MOONSHOT_API_KEY=
+# MOONSHOT_MODEL=kimi-k3
+# ARK_API_KEY=
+# ARK_MODEL=doubao-seed-1-6-250615
+
+# Optional OpenAI-compatible endpoint for text decisions only. Direct OpenAI is
+# still required for microphone ASR/TTS.
+# OPENAI_BASE_URL=
+# OPENROUTER_API_KEY=
+
+# Tune only if the microphone clips speech or waits too long at sentence end.
+VOICE_SAMPLE_RATE=16000
+VOICE_SILENCE_SECONDS=0.9
+VOICE_RMS_THRESHOLD=0.012
+AUDIO_PLAYER=afplay
+
+# WebRTC audio provider. "auto" prefers local say/espeak + Gemini ASR when
+# available, otherwise OpenAI TTS/ASR. Explicit choices: openai, gemini-system,
+# local-whisper. For local-whisper, install openai-whisper or point to an existing
+# environment; the audio and transcript are both ephemeral.
+WEBRTC_SPEECH_PROVIDER=auto
+GEMINI_API_KEY=
+GEMINI_ASR_MODEL=gemini-2.5-flash
+WHISPER_PYTHON=
+WHISPER_MODEL=tiny
+
+# Optional legacy Twilio transport. TWILIO_WEBHOOK_BASE_URL must point (via an
+# HTTPS tunnel/reverse proxy) to TWILIO_LOCAL_PORT; WebRTC needs none of these.
+TWILIO_ACCOUNT_SID=
+TWILIO_AUTH_TOKEN=
+TWILIO_FROM_NUMBER=
+PHONE_USER_NUMBER=
+TWILIO_WEBHOOK_BASE_URL=
+TWILIO_LOCAL_PORT=8765
+TWILIO_LANGUAGE=zh-CN
+TWILIO_VOICE=Google.zh-CN-Standard-A