.

models.py

@@ -77,8 +77,11 @@ class UserInfo(BaseModel):
     # JsonIgnore MonitorIPs in C#: we do not include it here
 
 
-# ---------- LLMServiceObj (field names match C# exactly) ----------
+
 class LLMServiceObj(BaseModel):
+    # allow using field names or aliases
+    model_config = ConfigDict(populate_by_name=True)
+
     # strings
     SessionId: str = ""
     JsonFunction: str = ""
@@ -106,27 +109,25 @@ class LLMServiceObj(BaseModel):
     IsSystemLlm: bool = False
     Timeout: Optional[int] = None
 
-    # complex
+    # complex (rename attrs; keep JSON names via alias)
     FunctionCallId: str = ""
-    FunctionCallData: FunctionCallData = Field(default_factory=FunctionCallData)
-    UserInfo: UserInfo = Field(default_factory=UserInfo)
+    function_call_data: FunctionCallData = Field(default_factory=FunctionCallData, alias="FunctionCallData")
+    user_info: UserInfo = Field(default_factory=UserInfo, alias="UserInfo")
     StartTimeUTC: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))
 
-    # stacks (arrays; C# Stack<T> will deserialize fine)
+    # stacks
     LlmStack: List[str] = Field(default_factory=list)
     FunctionCallIdStack: List[str] = Field(default_factory=list)
     FunctionNameStack: List[str] = Field(default_factory=list)
     IsProcessedStack: List[bool] = Field(default_factory=list)
     MessageIDStack: List[str] = Field(default_factory=list)
 
-    # function state flags (C# stores in FunctionState; we expose flat flags like your class does)
+    # function state flags
     IsFunctionCall: bool = False
     IsFunctionCallResponse: bool = False
     IsFunctionCallError: bool = False
     IsFunctionCallStatus: bool = False
     IsFunctionStillRunning: bool = False
-
-
 # ---------- ResultObj (from your C#) ----------
 class ResultObj(BaseModel):
     Message: str = ""