diff --git a/backend/common/core/deps.py b/backend/common/core/deps.py
new file mode 100644
index 0000000..0dcef44
--- /dev/null
+++ b/backend/common/core/deps.py
@@ -0,0 +1,36 @@
+import base64
+from typing import Annotated
+from urllib.parse import unquote
+
+from fastapi import Depends, Request
+from sqlmodel import Session
+from apps.system.schemas.system_schema import AssistantHeader, UserInfoDTO
+from common.core.db import get_session
+from common.utils.locale import I18n
+
+
+SessionDep = Annotated[Session, Depends(get_session)]
+i18n = I18n()
+async def get_i18n(request: Request):
+    return i18n(request)
+
+Trans = Annotated[I18n, Depends(get_i18n)]
+async def get_current_user(request: Request) -> UserInfoDTO:
+    return request.state.current_user
+
+CurrentUser = Annotated[UserInfoDTO, Depends(get_current_user)]
+
+async def get_current_assistant(request: Request) -> AssistantHeader | None:
+    base_assistant = request.state.assistant if hasattr(request.state, "assistant") else None
+    if request.headers.get("X-SQLBOT-ASSISTANT-CERTIFICATE"):
+        entry_certificate = request.headers['X-SQLBOT-ASSISTANT-CERTIFICATE']
+        base_assistant.certificate = unquote(base64.b64decode(entry_certificate).decode('utf-8'))
+    if request.headers.get("X-SQLBOT-ASSISTANT-ONLINE"):
+        entry_online = request.headers['X-SQLBOT-ASSISTANT-ONLINE']
+        base_assistant.online = str(entry_online).lower() == 'true' if entry_online else False
+    return base_assistant
+
+CurrentAssistant = Annotated[AssistantHeader, Depends(get_current_assistant)]
+
+
+