diff --git a/src/api/shared.py b/src/api/shared.py
index 8bddf0c..0b4d161 100644
--- a/src/api/shared.py
+++ b/src/api/shared.py
@@ -1,6 +1,5 @@
 """共享 helper 和常量"""
 
-from pathlib import Path
 from typing import Any, Dict
 from fastapi import HTTPException
 
@@ -56,7 +55,8 @@ def _init_agent_ids():
     if _KNOWN_AGENT_IDS:
         return
     try:
-        import yaml, os
+        import yaml
+        import os
         cfg_path = os.path.join(os.path.dirname(__file__), "..", "..", "config", "default.yaml")
         with open(cfg_path) as f:
             cfg = yaml.safe_load(f)
diff --git a/src/api/task_routes.py b/src/api/task_routes.py
index a0e04af..9071619 100644
--- a/src/api/task_routes.py
+++ b/src/api/task_routes.py
@@ -19,7 +19,6 @@ from src.api.shared import (
     _bb,
     _q,
     _task_to_dict,
-    _validate_project,
     _extract_mentions,
 )