fix:客服agent的bug修复

rag/intent.py

@@ -26,7 +26,17 @@ async def intent_recognize(query: str, *, llm_client) -> Intent:
     messages = [
         {
             "role": "system",
-            "content": "仅返回一个意图枚举值，不要输出解释。",
+            "content": (
+                "你是一个意图分类器。请根据用户输入，从以下选项中选择最匹配的意图，"
+                "并仅输出对应的英文标签（不输出任何其他内容）：\n"
+                "- guide_purchase: 用户询问如何购买基金、开户、注册等引导类问题\n"
+                "- want_advisor: 用户希望获得个性化基金推荐或投资顾问服务\n"
+                "- knowledge_qa: 用户询问基金相关的知识性问题，如净值、费率、风险等\n"
+                "- nl2sql_request: 用户要求查询具体数据或账户信息\n"
+                "- complain: 用户表达不满或投诉\n"
+                "- no_match: 以上都不匹配\n"
+                "仅输出一个小写英文标签，不要输出解释、标点或换行。"
+            ),
         },
         {"role": "user", "content": query},
     ]
@@ -36,4 +46,4 @@ async def intent_recognize(query: str, *, llm_client) -> Intent:
         logger.exception("intent recognition failed")
         return Intent.NO_MATCH
     value = raw.strip().strip('`').lower()
-    return Intent(value) if value in INTENT_VALUES else Intent.NO_MATCH
+    return Intent(value) if value in INTENT_VALUES else Intent.NO_MATCH

rag/retrieve.py

@@ -11,9 +11,9 @@ logger = logging.getLogger("rag.retrieve")
 
 
 BUSINESS_RETRIEVAL = (
-    ("fin_faq", "faq", 3, 0.75),
-    ("fin_fund_doc", "funddoc", 5, 0.70),
-    ("fin_policy", "policy", 5, 0.70),
+    ("fin_faq", "faq", 3, 0.40),
+    ("fin_fund_doc", "funddoc", 5, 0.35),
+    ("fin_policy", "policy", 5, 0.35),
 )
 
 
@@ -87,7 +87,12 @@ def _format_candidates(candidates) -> list[dict]:
         threshold = candidate["threshold"]
         for hit in _flatten_hits(candidate["results"]):
             entity = hit.get("entity") or hit
-            score = hit.get("distance", hit.get("score"))
+            distance = hit.get("distance")
+            raw_score = hit.get("score")
+            if distance is not None:
+                score = 1.0 - distance
+            else:
+                score = raw_score
             if score is None or score < threshold:
                 continue
             sources.append(
@@ -155,4 +160,4 @@ async def retrieve_with_status(
     except Exception:
         logger.exception("Milvus retrieval failed")
         return {"status": "milvus_unavailable", "sources": []}
-    return {"status": "ok", "sources": _format_candidates(candidates)}
+    return {"status": "ok", "sources": _format_candidates(candidates)}