Reverted agent, swarm, graph

Author: vawsgit

src/strands/agent/agent.py

@@ -720,4 +720,4 @@ def _end_agent_trace_span(
     def _append_message(self, message: Message) -> None:
         """Appends a message to the agent's list of messages and invokes the callbacks for the MessageCreatedEvent."""
         self.messages.append(message)
-        self.hooks.invoke_callbacks(MessageAddedEvent(agent=self, message=message))
+        self.hooks.invoke_callbacks(MessageAddedEvent(agent=self, message=message))

src/strands/multiagent/graph.py

@@ -716,4 +716,4 @@ def _build_result(self) -> GraphResult:
             execution_order=self.state.execution_order,
             edges=self.state.edges,
             entry_points=self.state.entry_points,
-        )
+        )

src/strands/multiagent/swarm.py

@@ -653,4 +653,4 @@ def _build_result(self) -> SwarmResult:
             execution_count=len(self.state.node_history),
             execution_time=self.state.execution_time,
             node_history=self.state.node_history,
-        )
+        )