[BREAKING] Python: Move single-config fluent methods to constructor parameters (#3693)

* Move single-config fluent methods to constructor parameters

* Updates

* Adjust magentic and group chat

python/samples/getting_started/workflows/human-in-the-loop/agents_with_HITL.py

@@ -184,8 +184,7 @@ async def main() -> None:
 
     # Build the workflow.
     workflow = (
-        WorkflowBuilder()
-        .set_start_executor(writer_agent)
+        WorkflowBuilder(start_executor=writer_agent)
         .add_edge(writer_agent, coordinator)
         .add_edge(coordinator, writer_agent)
         .add_edge(final_editor_agent, coordinator)

python/samples/getting_started/workflows/human-in-the-loop/agents_with_approval_requests.py

@@ -233,11 +233,9 @@ async def main() -> None:
 
     # Build the workflow
     workflow = (
-        WorkflowBuilder()
-        .set_start_executor(email_processor)
+        WorkflowBuilder(start_executor=email_processor, output_executors=[conclude_workflow])
         .add_edge(email_processor, email_writer_agent)
         .add_edge(email_writer_agent, conclude_workflow)
-        .with_output_from([conclude_workflow])
         .build()
     )
 

python/samples/getting_started/workflows/human-in-the-loop/concurrent_request_info.py

@@ -174,8 +174,7 @@ async def main() -> None:
 
     # Build workflow with request info enabled and custom aggregator
     workflow = (
-        ConcurrentBuilder()
-        .participants([technical_analyst, business_analyst, user_experience_analyst])
+        ConcurrentBuilder(participants=[technical_analyst, business_analyst, user_experience_analyst])
         .with_aggregator(aggregate_with_synthesis)
         # Only enable request info for the technical analyst agent
         .with_request_info(agents=["technical_analyst"])

python/samples/getting_started/workflows/human-in-the-loop/group_chat_request_info.py

@@ -137,11 +137,13 @@ async def main() -> None:
 
     # Build workflow with request info enabled
     # Using agents= filter to only pause before pragmatist speaks (not every turn)
+    # max_rounds=6: Limit to 6 rounds
     workflow = (
-        GroupChatBuilder()
-        .with_orchestrator(agent=orchestrator)
-        .participants([optimist, pragmatist, creative])
-        .with_max_rounds(6)
+        GroupChatBuilder(
+            participants=[optimist, pragmatist, creative],
+            max_rounds=6,
+            orchestrator_agent=orchestrator,
+        )
         .with_request_info(agents=[pragmatist])  # Only pause before pragmatist speaks
         .build()
     )

python/samples/getting_started/workflows/human-in-the-loop/guessing_game_with_human_input.py

@@ -198,8 +198,7 @@ async def main() -> None:
 
     # Build a simple loop: TurnManager <-> AgentExecutor.
     workflow = (
-        WorkflowBuilder()
-        .set_start_executor(turn_manager)
+        WorkflowBuilder(start_executor=turn_manager)
         .add_edge(turn_manager, guessing_agent)  # Ask agent to make/adjust a guess
         .add_edge(guessing_agent, turn_manager)  # Agent's response comes back to coordinator
     ).build()

python/samples/getting_started/workflows/human-in-the-loop/sequential_request_info.py

@@ -114,8 +114,7 @@ async def main() -> None:
 
     # Build workflow with request info enabled (pauses after each agent responds)
     workflow = (
-        SequentialBuilder()
-        .participants([drafter, editor, finalizer])
+        SequentialBuilder(participants=[drafter, editor, finalizer])
         # Only enable request info for the editor agent
         .with_request_info(agents=["editor"])
         .build()