I can use text to get audio response and barge in

services/__init__.py

@@ -0,0 +1,42 @@
+"""AI Services package.
+
+Provides ASR, LLM, TTS, and Realtime API services for voice conversation.
+"""
+
+from services.base import (
+    ServiceState,
+    ASRResult,
+    LLMMessage,
+    TTSChunk,
+    BaseASRService,
+    BaseLLMService,
+    BaseTTSService,
+)
+from services.llm import OpenAILLMService, MockLLMService
+from services.tts import EdgeTTSService, MockTTSService
+from services.asr import BufferedASRService, MockASRService
+from services.realtime import RealtimeService, RealtimeConfig, RealtimePipeline
+
+__all__ = [
+    # Base classes
+    "ServiceState",
+    "ASRResult",
+    "LLMMessage",
+    "TTSChunk",
+    "BaseASRService",
+    "BaseLLMService",
+    "BaseTTSService",
+    # LLM
+    "OpenAILLMService",
+    "MockLLMService",
+    # TTS
+    "EdgeTTSService",
+    "MockTTSService",
+    # ASR
+    "BufferedASRService",
+    "MockASRService",
+    # Realtime
+    "RealtimeService",
+    "RealtimeConfig",
+    "RealtimePipeline",
+]