Python: Implement message filtering in agent workflow to stop emitting already seen responses#4268

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leelakarthik wants to merge 7 commits intomicrosoft:mainfrom

leelakarthik:patch-6

Commits on Feb 26, 2026

Implement message filtering in agent workflow to stop emitting existing messages in response
leelakarthik
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test: add regression tests for _filter_messages and update list[Message] filtering expectations (#4261)

Leela Karthik U
authored and
leelakarthik
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Update python/packages/core/agent_framework/_workflows/_agent.py

leelakarthik
and
moonbox3
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fix: update _filter_messages to ensure consistent return type

Leela Karthik U
authored and
leelakarthik
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fix: enhance _filter_messages to return last meaningful non-user message and add unit tests

Leela Karthik U
authored and
leelakarthik
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test: add case for single assistant message with None text in _filter_messages

Leela Karthik U
authored and
leelakarthik
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test: update test_assistant_with_none_text_falls_through_to_next for clarity
Leela Karthik U
committed