feat: route voice pipeline through agent-service instead of direct LLM

Voice calls now use the same agent task + WS subscription flow as the
chat UI, enabling tool use and command execution during voice sessions.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

deploy/docker/docker-compose.yml

@@ -318,9 +318,11 @@ services:
       - "13008:3008"
     environment:
       - ANTHROPIC_API_KEY=${ANTHROPIC_API_KEY}
+      - ANTHROPIC_BASE_URL=${ANTHROPIC_BASE_URL}
       - AGENT_SERVICE_URL=http://agent-service:3002
       - WHISPER_MODEL=${WHISPER_MODEL:-base}
       - KOKORO_MODEL=${KOKORO_MODEL:-kokoro-82m}
+      - KOKORO_VOICE=${KOKORO_VOICE:-zf_xiaoxiao}
       - DEVICE=${VOICE_DEVICE:-cpu}
     healthcheck:
       test: ["CMD-SHELL", "python3 -c \"import urllib.request; urllib.request.urlopen('http://localhost:3008/docs')\""]

packages/services/voice-service/src/api/session_router.py

@@ -73,12 +73,16 @@ async def create_session(request: CreateSessionRequest, req: Request):
     if not hasattr(req.app.state, "sessions"):
         req.app.state.sessions = {}
 
+    # Capture JWT from the incoming request (Kong forwards it)
+    auth_header = req.headers.get("authorization", "")
+
     # Store session metadata
     req.app.state.sessions[session_id] = {
         "session_id": session_id,
         "status": "created",
         "execution_id": request.execution_id,
         "agent_context": request.agent_context,
+        "auth_header": auth_header,
         "task": None,
     }
 
@@ -217,6 +221,7 @@ async def voice_websocket(websocket: WebSocket, session_id: str):
             "session_id": session_id,
             "execution_id": session.get("execution_id"),
             "agent_context": session.get("agent_context", {}),
+            "auth_header": session.get("auth_header", ""),
         }
 
         # Create the voice pipeline using the WebSocket directly

packages/services/voice-service/src/config/settings.py

@@ -11,7 +11,8 @@ class Settings(BaseSettings):
 
     # Claude API
     anthropic_api_key: str = ""
-    claude_model: str = "claude-sonnet-4-5-20250929"
+    anthropic_base_url: str = ""
+    claude_model: str = "claude-sonnet-4-5-20250514"
 
     # Agent Service
     agent_service_url: str = "http://agent-service:3002"

packages/services/voice-service/src/pipeline/base_pipeline.py

@@ -1,20 +1,23 @@
 """
 Voice dialogue pipeline — direct WebSocket audio I/O.
 
-Pipeline: Audio Input → VAD → STT → LLM → TTS → Audio Output
+Pipeline: Audio Input → VAD → STT → Agent Service → TTS → Audio Output
 
 Runs as an async task that reads binary PCM frames from a FastAPI WebSocket,
-detects speech with VAD, transcribes with STT, generates a response via
-Claude LLM, synthesizes speech with TTS, and sends audio back.
+detects speech with VAD, transcribes with STT, sends text to the Agent
+service (which uses Claude SDK with tools), and synthesizes the response
+back as speech via TTS.
 """
 
 import asyncio
+import json
 import logging
 import time
 from typing import Optional
 
-import anthropic
+import httpx
 import numpy as np
+import websockets
 from fastapi import WebSocket
 
 from ..config.settings import settings
@@ -22,7 +25,9 @@ from ..stt.whisper_service import WhisperSTTService
 from ..tts.kokoro_service import KokoroTTSService
 from ..vad.silero_service import SileroVADService
 
+logging.basicConfig(level=logging.INFO)
 logger = logging.getLogger(__name__)
+logger.setLevel(logging.INFO)
 
 # Minimum speech duration in seconds before we transcribe
 _MIN_SPEECH_SECS = 0.5
@@ -57,26 +62,20 @@ class VoicePipelineTask:
         self.tts = tts
         self.vad = vad
 
-        self._conversation: list[dict] = [
-            {
-                "role": "user",
-                "content": (
-                    "You are iAgent, an AI voice assistant for IT operations. "
-                    "Respond concisely in Chinese. Keep answers under 2 sentences "
-                    "when possible. You are in a real-time voice conversation."
-                ),
-            },
-            {
-                "role": "assistant",
-                "content": "好的，我是 iAgent 智能运维语音助手。有什么可以帮您的？",
-            },
-        ]
+        # Agent session ID (reused across turns for conversation continuity)
+        self._agent_session_id: Optional[str] = None
+        self._auth_header: str = session_context.get("auth_header", "")
+
         self._cancelled = False
         self._speaking = False  # True while sending TTS audio to client
 
     async def run(self):
         """Main loop: read audio → VAD → STT → LLM → TTS → send audio."""
-        logger.info("Voice pipeline started for session %s", self.session_context.get("session_id"))
+        sid = self.session_context.get("session_id", "?")
+        print(f"[pipeline] Started for session {sid}", flush=True)
+        print(f"[pipeline] STT={self.stt is not None and self.stt._model is not None}, "
+              f"TTS={self.tts is not None and self.tts._pipeline is not None}, "
+              f"VAD={self.vad is not None and self.vad._model is not None}", flush=True)
 
         # Audio buffer for accumulating speech
         speech_buffer = bytearray()
@@ -84,6 +83,7 @@ class VoicePipelineTask:
         is_speech_active = False
         silence_start: Optional[float] = None
         speech_start: Optional[float] = None
+        chunk_count = 0
 
         try:
             while not self._cancelled:
@@ -92,12 +92,16 @@ class VoicePipelineTask:
                         self.websocket.receive_bytes(), timeout=30.0
                     )
                 except asyncio.TimeoutError:
-                    # No data for 30s — connection might be dead
+                    print(f"[pipeline] No data for 30s, session {sid}", flush=True)
                     continue
-                except Exception:
-                    # WebSocket closed
+                except Exception as exc:
+                    print(f"[pipeline] WebSocket read error: {type(exc).__name__}: {exc}", flush=True)
                     break
 
+                chunk_count += 1
+                if chunk_count <= 3 or chunk_count % 100 == 0:
+                    print(f"[pipeline] Received audio chunk #{chunk_count}, len={len(data)}", flush=True)
+
                 # Accumulate into VAD-sized chunks
                 vad_buffer.extend(data)
 
@@ -113,10 +117,11 @@ class VoicePipelineTask:
                             is_speech_active = True
                             speech_start = time.time()
                             silence_start = None
+                            print(f"[pipeline] Speech detected!", flush=True)
                             # Barge-in: if we were speaking TTS, stop
                             if self._speaking:
                                 self._cancelled_tts = True
-                                logger.debug("Barge-in detected")
+                                print("[pipeline] Barge-in!", flush=True)
 
                         speech_buffer.extend(chunk)
                         silence_start = None
@@ -130,6 +135,8 @@ class VoicePipelineTask:
                             elif time.time() - silence_start >= _SILENCE_AFTER_SPEECH_SECS:
                                 # Silence detected after speech — process
                                 speech_duration = time.time() - (speech_start or time.time())
+                                buf_secs = len(speech_buffer) / (_SAMPLE_RATE * _BYTES_PER_SAMPLE)
+                                print(f"[pipeline] Silence after speech: duration={speech_duration:.1f}s, buffer={buf_secs:.1f}s", flush=True)
                                 if speech_duration >= _MIN_SPEECH_SECS and len(speech_buffer) > 0:
                                     await self._process_speech(bytes(speech_buffer))
 
@@ -140,11 +147,13 @@ class VoicePipelineTask:
                                 speech_start = None
 
         except asyncio.CancelledError:
-            logger.info("Voice pipeline cancelled")
+            print(f"[pipeline] Cancelled, session {sid}", flush=True)
         except Exception as exc:
-            logger.exception("Voice pipeline error: %s", exc)
+            print(f"[pipeline] ERROR: {type(exc).__name__}: {exc}", flush=True)
+            import traceback
+            traceback.print_exc()
         finally:
-            logger.info("Voice pipeline ended for session %s", self.session_context.get("session_id"))
+            print(f"[pipeline] Ended for session {sid}", flush=True)
 
     def cancel(self):
         self._cancelled = True
@@ -163,14 +172,16 @@ class VoicePipelineTask:
     async def _process_speech(self, audio_data: bytes):
         """Transcribe speech, generate LLM response, synthesize and send TTS."""
         session_id = self.session_context.get("session_id", "?")
+        audio_secs = len(audio_data) / (_SAMPLE_RATE * _BYTES_PER_SAMPLE)
+        print(f"[pipeline] Processing speech: {audio_secs:.1f}s of audio", flush=True)
 
         # 1. STT
         text = await self._transcribe(audio_data)
         if not text or not text.strip():
-            logger.debug("[%s] STT returned empty text, skipping", session_id)
+            print(f"[pipeline] STT returned empty text, skipping", flush=True)
             return
 
-        logger.info("[%s] User said: %s", session_id, text.strip())
+        print(f"[pipeline] User said: {text.strip()}", flush=True)
 
         # Notify client that we heard them
         try:
@@ -181,19 +192,16 @@ class VoicePipelineTask:
         except Exception:
             pass
 
-        # 2. LLM
-        self._conversation.append({"role": "user", "content": text.strip()})
-        response_text = await self._llm_generate()
+        # 2. Agent service — create task + subscribe for response
+        response_text = await self._agent_generate(text.strip())
         if not response_text:
-            logger.warning("[%s] LLM returned empty response", session_id)
+            print(f"[pipeline] Agent returned empty response", flush=True)
             return
 
-        logger.info("[%s] Agent says: %s", session_id, response_text)
-        self._conversation.append({"role": "assistant", "content": response_text})
+        print(f"[pipeline] Agent says: {response_text[:100]}", flush=True)
 
         # Notify client of the response text
         try:
-            import json
             await self.websocket.send_text(
                 json.dumps({"type": "transcript", "text": response_text, "role": "assistant"})
             )
@@ -214,23 +222,105 @@ class VoicePipelineTask:
             logger.error("STT error: %s", exc)
             return ""
 
-    async def _llm_generate(self) -> str:
-        """Generate a response using Anthropic Claude."""
-        if not settings.anthropic_api_key:
-            logger.warning("Anthropic API key not set, returning default response")
-            return "抱歉，语音助手暂时无法连接到AI服务。"
+    async def _agent_generate(self, user_text: str) -> str:
+        """Send user text to agent-service, subscribe via WS, collect response.
+
+        Mirrors the Flutter chat flow:
+        1. POST /api/v1/agent/tasks  → get sessionId + taskId
+        2. WS connect to /ws/agent   → subscribe_session
+        3. Collect 'text' stream events until 'completed'
+        """
+        agent_url = settings.agent_service_url  # http://agent-service:3002
+        headers = {"Content-Type": "application/json"}
+        if self._auth_header:
+            headers["Authorization"] = self._auth_header
 
         try:
-            client = anthropic.AsyncAnthropic(api_key=settings.anthropic_api_key)
-            response = await client.messages.create(
-                model=settings.claude_model,
-                max_tokens=256,
-                messages=self._conversation,
-            )
-            return response.content[0].text if response.content else ""
+            # 1. Create agent task
+            body = {"prompt": user_text}
+            if self._agent_session_id:
+                body["sessionId"] = self._agent_session_id
+
+            print(f"[pipeline] Creating agent task: {user_text[:60]}", flush=True)
+            async with httpx.AsyncClient(timeout=30) as client:
+                resp = await client.post(
+                    f"{agent_url}/api/v1/agent/tasks",
+                    json=body,
+                    headers=headers,
+                )
+                if resp.status_code != 200 and resp.status_code != 201:
+                    print(f"[pipeline] Agent task creation failed: {resp.status_code} {resp.text}", flush=True)
+                    return "抱歉，Agent服务暂时不可用。"
+
+                data = resp.json()
+                session_id = data.get("sessionId", "")
+                task_id = data.get("taskId", "")
+                self._agent_session_id = session_id
+                print(f"[pipeline] Agent task created: session={session_id}, task={task_id}", flush=True)
+
+            # 2. Subscribe via WebSocket and collect text events
+            ws_url = agent_url.replace("http://", "ws://").replace("https://", "wss://")
+            ws_url = f"{ws_url}/ws/agent"
+
+            collected_text = []
+            timeout_secs = 60  # Max wait for agent response
+
+            async with websockets.connect(ws_url) as ws:
+                # Subscribe to the session
+                subscribe_msg = json.dumps({
+                    "event": "subscribe_session",
+                    "data": {"sessionId": session_id, "taskId": task_id},
+                })
+                await ws.send(subscribe_msg)
+                print(f"[pipeline] Subscribed to agent WS session={session_id}", flush=True)
+
+                # Collect events until completed
+                deadline = time.time() + timeout_secs
+                while time.time() < deadline:
+                    try:
+                        raw = await asyncio.wait_for(ws.recv(), timeout=5.0)
+                    except asyncio.TimeoutError:
+                        continue
+                    except Exception:
+                        break
+
+                    try:
+                        msg = json.loads(raw)
+                    except (json.JSONDecodeError, TypeError):
+                        continue
+
+                    event_type = msg.get("event", "")
+
+                    if event_type == "stream_event":
+                        evt_data = msg.get("data", {})
+                        evt_type = evt_data.get("type", "")
+                        payload = evt_data.get("data", {})
+
+                        if evt_type == "text":
+                            content = payload.get("content", "")
+                            if content:
+                                collected_text.append(content)
+
+                        elif evt_type == "completed":
+                            summary = payload.get("summary", "")
+                            if summary and not collected_text:
+                                collected_text.append(summary)
+                            print(f"[pipeline] Agent completed", flush=True)
+                            break
+
+                        elif evt_type == "error":
+                            err_msg = payload.get("message", "Unknown error")
+                            print(f"[pipeline] Agent error: {err_msg}", flush=True)
+                            return f"Agent 错误: {err_msg}"
+
+            result = "".join(collected_text).strip()
+            if not result:
+                return "Agent 未返回回复。"
+            return result
+
         except Exception as exc:
-            logger.error("LLM error: %s", exc)
-            return "抱歉，AI服务暂时不可用，请稍后再试。"
+            print(f"[pipeline] Agent generate error: {type(exc).__name__}: {exc}", flush=True)
+            return "抱歉，Agent服务暂时不可用，请稍后再试。"
 
     async def _synthesize_and_send(self, text: str):
         """Synthesize text to speech and send audio chunks over WebSocket."""