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app/config.py

@@ -0,0 +1,30 @@
+from pydantic_settings import BaseSettings
+from functools import lru_cache
+
+
+class Settings(BaseSettings):
+    """Application settings loaded from environment variables."""
+    
+    # Database Configuration
+    DATABASE_URL: str = "postgresql+asyncpg://myuser:mypassword@127.0.0.1:5432/mydatabase"
+    
+    # LLM API Configuration
+    LLM_API_KEY: str
+    LLM_API_BASE: str = "https://api.openai.com/v1"
+    LLM_DEFAULT_MODEL: str = "openai/gpt-4o"
+    
+    # App Configuration
+    DEFAULT_APP_NAME: str = "adk_chat_app"
+
+    class Config:
+        env_file = ".env"
+        extra = "ignore"
+
+
+@lru_cache
+def get_settings() -> Settings:
+    """Get cached settings instance."""
+    return Settings()
+
+
+settings = get_settings()