feat: 新增文件

engine/config.py

@@ -0,0 +1,28 @@
+from __future__ import annotations
+
+from dataclasses import dataclass
+from pathlib import Path
+from typing import Any
+
+import yaml
+
+
+@dataclass(frozen=True)
+class AppConfig:
+    data: dict[str, Any]
+
+    @staticmethod
+    def load(path: str | Path) -> "AppConfig":
+        p = Path(path)
+        raw = yaml.safe_load(p.read_text(encoding="utf-8")) if p.exists() else {}
+        if not isinstance(raw, dict):
+            raise ValueError(f"Config root must be a mapping, got {type(raw)}")
+        return AppConfig(raw)
+
+    def get(self, dotted: str, default: Any = None) -> Any:
+        cur: Any = self.data
+        for part in dotted.split("."):
+            if not isinstance(cur, dict) or part not in cur:
+                return default
+            cur = cur[part]
+        return cur