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[WIP] Propagate changes from PR 2147
No-op: onnxruntime-genai#2147 Python builder already propagated; remainder is C++ runtime only
Jun 17, 2026
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June 17, 2026 12:49
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Task was to propagate onnxruntime-genai#2147 (VideoChat-Flash-Qwen text decoder export) into
mbext. After diffing upstream against the current tree, no code changes are required.Already present (propagated via mbext #371)
The Python model-builder portion of #2147 — the only surface
mbextmirrors — is already in the repo and matches upstream's final state (modulo local-import style and the Microsoft copyright-header convention):modelbuilder/builder.py—VideoChatFlashQwenForCausalLMdispatch (forcesexclude_embeds=True)modelbuilder/builders/__init__.py—VideoChatFlashQwenModelexportmodelbuilder/builders/qwen.py—VideoChatFlashQwenModel(QwenModel)(model_type="VideoChat_Flash_QwenForCausalLM", weights loaded viaQwen2ForCausalLM)tests/fast/test_random_videochat_flash_qwen.py— fast offline testsOut of scope (C++ runtime only)
The newer #2147 commits touch only the C++ runtime and have no Python-builder counterpart or
genai_config.jsonoutput change:config.cpp/.h— newvision.num_visual_tokensfieldvideochat_flash_processor.cpp/.h— newVideoChatFlashProcessormodel.cpp— processor registration;model_type.h—videochat_flash_qwenadded toIsVLM()num_visual_tokensis consumed by the C++ processor for the full VLM pipeline. The builder exports the text decoder only (exclude_embeds=True, no vision section), so there is nothing for it to emit — matching upstream's core builder.Recommendation
Close the tracking issue as already-propagated. Consistent with prior no-op propagation PRs #383 and #386.