落地系统异常：大模型/TMS/建群故障停住本单并告警，后台可重试失败步骤。

Co-authored-by: Cursor <cursoragent@cursor.com>

inquiry-agent/agent/routing/dispatch.py

@@ -123,6 +123,36 @@ def _wrap_route_failed(message: InboundMessage) -> None:
     )
 
 
+def _wrap_route_model_failed(message: InboundMessage) -> None:
+    """路由模型超时/报错/空结果：大模型异常（无工单不建单）。"""
+    from agent.policy.system_exception import confirm_llm_if_tech
+    from agent.ledger.http_ledger import HttpLedger
+    from agent.config import get_settings
+    from agent.channel.queue import get_message_store
+
+    def reply(text: str) -> None:
+        get_message_store().enqueue_outbound(
+            touser=message.sender_id,
+            content=text,
+            dedupe_key=f"route-llm:{message.message_id}",
+        )
+
+    ledger = None
+    try:
+        if (get_settings().ledger_backend or "").lower() != "memory":
+            ledger = HttpLedger()
+    except Exception:
+        ledger = None
+    confirm_llm_if_tech(
+        ledger=ledger,
+        reply=reply,
+        sender_id=message.sender_id,
+        reason="模型返回空结果",
+        conversation_kind="group" if getattr(message, "chat_id", "") else "private",
+        conversation_target=getattr(message, "chat_id", "") or message.sender_id,
+    )
+
+
 # 意图 → handler（空壳或联调 echo）；扩展时只改表，不改 ChannelRuntime 分支森林
 HANDLER_REGISTRY: dict[str, HandlerFn] = {
     "echo_text": _wrap_echo,
@@ -142,7 +172,7 @@ HANDLER_REGISTRY: dict[str, HandlerFn] = {
     "reject_no_sender": _noop,
     "ignore_empty": _noop,
     "stub_needs_model": _wrap_echo,
-    "route_model_failed": _wrap_route_failed,
+    "route_model_failed": _wrap_route_model_failed,
     "route_parse_failed": _wrap_route_failed,
 }