feat: personal ai agent framework

agent/tools/browser_tool.py

@@ -0,0 +1,18 @@
+def copy(self):
+    """
+    Special copy method for browser tool to avoid recreating browser instance.
+    
+    :return: A new instance with shared browser reference but unique model
+    """
+    new_tool = self.__class__()
+    
+    # Copy essential attributes
+    new_tool.model = self.model
+    new_tool.context = getattr(self, 'context', None)
+    new_tool.config = getattr(self, 'config', None)
+    
+    # Share the browser instance instead of creating a new one
+    if hasattr(self, 'browser'):
+        new_tool.browser = self.browser
+    
+    return new_tool