diff --git a/pipeline_service/agent_loop.py b/pipeline_service/agent_loop.py
index 73ded22..5c7056b 100644
--- a/pipeline_service/agent_loop.py
+++ b/pipeline_service/agent_loop.py
@@ -1762,6 +1762,26 @@ def _parse_agent_action(raw):
     if raw.startswith("```"):
         raw = raw.split("\n", 1)[1].rsplit("```", 1)[0].strip()
 
+    # deepseek v4 原生格式（全角竖线）：<｜DSML｜｜invoke name="...">…<｜DSML｜｜parameter name="...">value</｜DSML｜｜parameter></｜DSML｜｜invoke>
+    # 与旧版 <invoke> 同款解析：长上下文多轮时 deepseek 会自发输出该格式，不解析则全部判「未识别」→ 5 轮耗尽。
+    m = re.search(r'<｜DSML｜｜invoke\s+name="([^"]+)"[^>]*>(.*?)</｜DSML｜｜invoke>', raw, re.DOTALL)
+    if m:
+        tool = m.group(1).strip()
+        body = m.group(2)
+        params = {}
+        for pm in re.finditer(r'<｜DSML｜｜parameter\s+name="([^"]+)"[^>]*>(.*?)</｜DSML｜｜parameter>', body, re.DOTALL):
+            val = pm.group(2).strip()
+            try:
+                val = json.loads(val)
+            except (json.JSONDecodeError, ValueError):
+                pass
+            params[pm.group(1)] = val
+        if tool in ('deliver', 'deliver_result', 'submit', 'finish'):
+            return {"action": "deliver", **params}
+        if tool in ('ask', 'ask_question', 'ask_user'):
+            return {"action": "ask", "question": params.get("question", "")}
+        return {"action": "tool_call", "tool": tool, "params": params}
+
     # deepseek 原生 function calling 输出 XML：<tool_calls><invoke name="..."><parameter name="..." string="true">...</parameter></invoke></tool_calls>
     m = re.search(r'<invoke\s+name="([^"]+)"[^>]*>(.*?)</invoke>', raw, re.DOTALL)
     if m: