feat: support duckduckgo search engine

src/config/__init__.py

@@ -1,4 +1,4 @@
-from .tools import TAVILY_MAX_RESULTS
+from .tools import SEARCH_MAX_RESULTS, SELECTED_SEARCH_ENGINE, SearchEngine
 from .loader import load_yaml_config
 
 from dotenv import load_dotenv
@@ -38,5 +38,7 @@ __all__ = [
     # Other configurations
     "TEAM_MEMBERS",
     "TEAM_MEMBER_CONFIGRATIONS",
-    "TAVILY_MAX_RESULTS",
+    "SEARCH_MAX_RESULTS",
+    "SELECTED_SEARCH_ENGINE",
+    "SearchEngine",
 ]

src/config/tools.py

@@ -1,2 +1,15 @@
+import os
+import enum
+from dotenv import load_dotenv
+
+load_dotenv()
+
+
+class SearchEngine(enum.Enum):
+    TAVILY = "tavily"
+    DUCKDUCKGO = "duckduckgo"
+
+
 # Tool configuration
-TAVILY_MAX_RESULTS = 3
+SELECTED_SEARCH_ENGINE = os.getenv("SEARCH_API", SearchEngine.TAVILY.value)
+SEARCH_MAX_RESULTS = 3