Revert "remove send to agent. Already handled in oai_messages"

This reverts commit eb5ac4c.

autogen/agentchat/contrib/orchestrator_agent.py

@@ -398,6 +398,10 @@ def _select_next_agent(self, task: str) -> Optional[ConversableAgent]:
                     synthesized_prompt = self._get_synthesize_prompt(
                         self._task, self._team_description, self._facts, self._plan
                     )
+
+                    # Share new plan with all agents
+                    for agent in self._agents:
+                        self.send(synthesized_prompt, agent)
 
                     logger.info(
                             f"(thought) New plan:\n{synthesized_prompt}"
@@ -421,6 +425,8 @@ def _select_next_agent(self, task: str) -> Optional[ConversableAgent]:
                 # Update chat history
                 self._append_oai_message({"role": "assistant", "content": instruction}, "assistant", self, True)
 
+                # Send instruction directly to the agent
+                self.send(instruction, agent)
                 return agent
 
         return None