delete vectara

hallucination_config.py

@@ -3,9 +3,9 @@ Hallucination Detector Configuration
 Configure which detection method to use
 """
 
-# Detection method: 'vectara', 'nli', 'lightweight', or 'hybrid' (recommended)
-# 注意: lightweight 是新添加的轻量级方案，无需特殊权限
-HALLUCINATION_DETECTION_METHOD = "lightweight"
+# Detection method: 'vectara', 'nli', or 'hybrid' (recommended)
+# 使用 'nli' 可以完全避免 Vectara 权限问题
+HALLUCINATION_DETECTION_METHOD = "nli"
 
 # Thresholds
 VECTARA_HALLUCINATION_THRESHOLD = 0.5  # Score above this = hallucination

hallucination_detector.py

@@ -390,12 +390,12 @@ class HybridHallucinationDetector:
         return "no" if result['has_hallucination'] else "yes"
 
 
-def initialize_hallucination_detector(method: str = "lightweight") -> object:
+def initialize_hallucination_detector(method: str = "nli") -> object:
     """
     初始化幻觉检测器
     
     Args:
-        method: 'vectara', 'nli', 'lightweight', 或 'hybrid' (推荐)
+        method: 'vectara', 'nli', 或 'hybrid' (推荐)
         
     Returns:
         幻觉检测器实例
@@ -404,8 +404,6 @@ def initialize_hallucination_detector(method: str = "lightweight") -> object:
         return VectaraHallucinationDetector()
     elif method == "nli":
         return NLIHallucinationDetector()
-    elif method == "lightweight":
-        return LightweightHallucinationDetector()
     elif method == "hybrid":
         return HybridHallucinationDetector(use_vectara=False, use_nli=True)  # 禁用Vectara，使用NLI
     else: