fix: _parse_agent_action 解析 deepseek XML tool_calls（原生 FC 输出格式）

pipeline_service/agent_loop.py

@@ -13,6 +13,7 @@ v3.4.0 新增：
 import asyncio
 import json
 import os
+import re
 import subprocess
 import logging
 
@@ -465,6 +466,26 @@ def _parse_agent_action(raw):
     raw = (raw or "").strip()
     if raw.startswith("```"):
         raw = raw.split("\n", 1)[1].rsplit("```", 1)[0].strip()
+
+    # deepseek 原生 function calling 输出 XML：<tool_calls><invoke name="..."><parameter name="...">...</parameter></invoke></tool_calls>
+    m = re.search(r'<invoke\s+name="([^"]+)"\s*>(.*?)</invoke>', raw, re.DOTALL)
+    if m:
+        tool = m.group(1).strip()
+        body = m.group(2)
+        params = {}
+        for pm in re.finditer(r'<parameter\s+name="([^"]+)"\s*>(.*?)</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}
+
     try:
         d = json.loads(raw)
         if isinstance(d, dict) and 'action' in d: