[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/tool-approval/concurrent_builder_tool_approval.py

@@ -148,7 +148,7 @@ async def main() -> None:
 
     # 4. Build a concurrent workflow with both agents
     # ConcurrentBuilder requires at least 2 participants for fan-out
-    workflow = ConcurrentBuilder().participants([microsoft_agent, google_agent]).build()
+    workflow = ConcurrentBuilder(participants=[microsoft_agent, google_agent]).build()
 
     # 5. Start the workflow - both agents will process the same task in parallel
     print("Starting concurrent workflow with tool approval...")

python/samples/getting_started/workflows/tool-approval/group_chat_builder_tool_approval.py

@@ -146,18 +146,16 @@ async def main() -> None:
     )
 
     # 4. Build a group chat workflow with the selector function
-    workflow = (
-        GroupChatBuilder()
-        .with_orchestrator(selection_func=select_next_speaker)
-        .participants([qa_engineer, devops_engineer])
-        # Set a hard limit to 4 rounds
-        # First round: QAEngineer speaks
-        # Second round: DevOpsEngineer speaks (check staging + create rollback)
-        # Third round: DevOpsEngineer speaks with an approval request (deploy to production)
-        # Fourth round: DevOpsEngineer speaks again after approval
-        .with_max_rounds(4)
-        .build()
-    )
+    # max_rounds=4: Set a hard limit to 4 rounds
+    # First round: QAEngineer speaks
+    # Second round: DevOpsEngineer speaks (check staging + create rollback)
+    # Third round: DevOpsEngineer speaks with an approval request (deploy to production)
+    # Fourth round: DevOpsEngineer speaks again after approval
+    workflow = GroupChatBuilder(
+        participants=[qa_engineer, devops_engineer],
+        max_rounds=4,
+        selection_func=select_next_speaker,
+    ).build()
 
     # 5. Start the workflow
     print("Starting group chat workflow for software deployment...")

python/samples/getting_started/workflows/tool-approval/sequential_builder_tool_approval.py

@@ -111,7 +111,7 @@ async def main() -> None:
     )
 
     # 3. Build a sequential workflow with the agent
-    workflow = SequentialBuilder().participants([database_agent]).build()
+    workflow = SequentialBuilder(participants=[database_agent]).build()
 
     # 4. Start the workflow with a user task
     print("Starting sequential workflow with tool approval...")