feat: voice mode event filtering — skip tool/thinking events for Agent SDK

1. Remove on_enter greeting entirely (no more race condition)
2. voice-agent sends voiceMode: true when engine_type is claude_agent_sdk
3. AgentController.runTaskStream() filters thinking, tool_use, tool_result
   events in voice mode — only text, completed, error reach the client
4. Detailed logging: each event logged with [FILTERED-voice] tag when skipped

Claude API mode is completely unaffected (voiceMode defaults to false).

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

packages/services/agent-service/src/interfaces/rest/controllers/agent.controller.ts

@@ -38,6 +38,7 @@ export class AgentController {
       allowedTools?: string[];
       engineType?: string;
       maxContextMessages?: number;
+      voiceMode?: boolean;
       attachments?: Array<{ base64Data: string; mediaType: string; fileName?: string }>;
     },
   ) {
@@ -118,6 +119,7 @@ export class AgentController {
       maxTurns: body.maxTurns || 10,
       conversationHistory: historyForEngine.length > 0 ? historyForEngine : undefined,
       resumeSessionId,
+      voiceMode: body.voiceMode ?? false,
     });
 
     return { sessionId: session.id, taskId: task.id };
@@ -406,9 +408,17 @@ export class AgentController {
       maxTurns: number;
       conversationHistory?: Array<{ role: 'user' | 'assistant'; content: string | any[] }>;
       resumeSessionId?: string;
+      voiceMode?: boolean;
     },
   ) {
     const isSdkEngine = engine.engineType === AgentEngineType.CLAUDE_AGENT_SDK;
+    const voiceMode = params.voiceMode ?? false;
+    /** Event types to suppress in voice mode (only forward text/completed/error) */
+    const voiceFilteredTypes = new Set(['thinking', 'tool_use', 'tool_result']);
+
+    if (voiceMode) {
+      this.logger.log(`[Task ${task.id}] Voice mode ON — filtering ${[...voiceFilteredTypes].join(', ')} events`);
+    }
 
     const taskPromise = (async () => {
       let finished = false;
@@ -431,8 +441,14 @@ export class AgentController {
 
         for await (const event of stream) {
           eventCount++;
-          this.logger.log(`[Task ${task.id}] Event #${eventCount}: type=${event.type}${event.type === 'text' ? ` len=${(event as any).content?.length}` : ''}${event.type === 'error' ? ` msg=${(event as any).message}` : ''}`);
-          this.gateway.emitStreamEvent(session.id, event);
+          const isFiltered = voiceMode && voiceFilteredTypes.has(event.type);
+          this.logger.log(`[Task ${task.id}] Event #${eventCount}: type=${event.type}${event.type === 'text' ? ` len=${(event as any).content?.length}` : ''}${event.type === 'error' ? ` msg=${(event as any).message}` : ''}${isFiltered ? ' [FILTERED-voice]' : ''}`);
+
+          // In voice mode, skip intermediate events (tool_use, tool_result, thinking)
+          // but still process lifecycle events below (completed/error/approval)
+          if (!isFiltered) {
+            this.gateway.emitStreamEvent(session.id, event);
+          }
 
           // Collect text for assistant message
           if (event.type === 'text') {

packages/services/voice-agent/src/agent.py

@@ -93,14 +93,8 @@ class IT0VoiceAgent(Agent):
         )
 
     async def on_enter(self):
-        """Called when the agent becomes active — greet the user.
-
-        Uses session.say() with a static message instead of generate_reply()
-        to avoid triggering the Agent SDK / LLM pipeline for a simple greeting.
-        This prevents a race condition when the user speaks before the
-        greeting LLM task completes.
-        """
-        self.session.say("你好，我是IT0运维助手，有什么可以帮你的？")
+        """No greeting — wait for the user to speak first."""
+        pass
 
 
 # ---------------------------------------------------------------------------

packages/services/voice-agent/src/plugins/agent_llm.py

@@ -225,19 +225,23 @@ class AgentServiceLLMStream(llm.LLMStream):
                     f"\n用户说：{user_text}"
                 )
 
+            # Voice mode flag: tell agent-service to filter intermediate events
+            # (tool_use, tool_result, thinking) — only stream text + completed + error
+            voice_mode = engine_type == "claude_agent_sdk"
+
             body: dict[str, Any] = {
                 "prompt": prompt,
                 "engineType": engine_type,
+                "voiceMode": voice_mode,
             }
             if self._llm_instance._agent_session_id:
                 body["sessionId"] = self._llm_instance._agent_session_id
 
             logger.info(
-                "POST /tasks engine=%s wrapped=%s user_text=%s body.engineType=%s",
+                "POST /tasks engine=%s voiceMode=%s user_text=%s",
                 engine_type,
-                engine_type == "claude_agent_sdk",
+                voice_mode,
                 user_text[:80],
-                body["engineType"],
             )
             async with httpx.AsyncClient(
                 timeout=httpx.Timeout(connect=10, read=30, write=10, pool=10),