diff --git a/src/cli/blackboard.py b/src/cli/blackboard.py
index 8c1aa9d..44512be 100644
--- a/src/cli/blackboard.py
+++ b/src/cli/blackboard.py
@@ -9,32 +9,13 @@ from pathlib import Path
 from typing import List, Optional
 
 from src.blackboard.operations import Blackboard
-from src.blackboard.models import Task, Comment, Output, Decision, Observation, Review, Experience
+from src.utils import get_data_root, Comment, Output, Decision, Observation, Review, Experience
 from src.blackboard.queries import Queries
 from src.blackboard.registry import ProjectRegistry
 
 
 def _find_project_root() -> Path:
-    """从环境变量、配置文件或默认路径找项目根目录"""
-    import os
-    # 1. 环境变量最高优先级
-    root = os.environ.get("BLACKBOARD_ROOT")
-    if root:
-        return Path(root)
-    # 2. 从 config/default.yaml 读取
-    try:
-        import yaml
-        config_path = Path(__file__).parent.parent / "config" / "default.yaml"
-        if config_path.exists():
-            with open(config_path) as f:
-                cfg = yaml.safe_load(f) or {}
-            data_root = cfg.get("data_root")
-            if data_root:
-                return Path(data_root).expanduser()
-    except Exception:
-        pass
-    # 3. 相对于源码目录的 data/
-    return Path(__file__).parent.parent / "data"
+    return get_data_root()
 
 
 def _get_bb(project_id: str) -> Blackboard:
diff --git a/src/main.py b/src/main.py
index 1577a6b..f55258c 100644
--- a/src/main.py
+++ b/src/main.py
@@ -14,6 +14,7 @@ from fastapi.staticfiles import StaticFiles
 
 from src.blackboard.registry import ProjectRegistry
 from src.daemon.ticker import Ticker
+from src.utils import get_data_root
 
 logger = logging.getLogger("moziplus-v2")
 
@@ -38,7 +39,7 @@ config = load_config()
 # 全局组件
 # ---------------------------------------------------------------------------
 
-DATA_ROOT = Path(config.get("data_root", Path(__file__).parent.parent / "data"))
+DATA_ROOT = get_data_root()
 
 ticker: Optional[Ticker] = None