debug: trace auto-inject behavior

pipeline_service/agent_loop_v2.py

@@ -136,6 +136,14 @@ class AgentExecutor:
                 action_type = act.get("action", "")
 
                 if action_type == "reply":
+                    # debug: always emit count
+                    yield json.dumps({
+                        "type": "debug",
+                        "tool_call_count": self._tool_call_count,
+                        "turn": self._turn_count,
+                        "action": action_type,
+                    }, ensure_ascii=False) + "\n"
+
                     # 任何轮次，只要没成功调过工具就 reply → 强制注入工具调用
                     if self._tool_call_count == 0:
                         hint_tool = "diagnose_project"