Install yolo26 requirements before portable export in CI

[digantdesai]

test_model.sh exports yolo26 via examples.portable.scripts.export, but yolo26's model imports ultralytics, which was never installed -- the CI job failed with ModuleNotFoundError: No module named 'ultralytics'.

Install examples/models/yolo26/requirements.txt before the export, matching the per-model dep handling already used for llava/edsr/mb. Use the README's install command (--upgrade-strategy only-if-needed, CPU extra-index) so the ultralytics torch/torchvision deps do not upgrade ExecuTorch's pinned versions.

Authored with Claude assistance.

[pytorch-bot]

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❌ 2 New Failures, 1 Unrelated Failure, 7 Unclassified Failures

As of commit c75a565 with merge base e03f777 ():

NEW FAILURES - The following jobs have failed:

• pull / test-multimodal-linux (gemma3-4b) / linux-job (gh)
  RuntimeError: Command docker exec -t 9a858299cef7568ba8647307e3c83a141ea0f83d5675de3008aa2c9f058baaf5 /exec failed with exit code 139
• pull / unittest-buck / linux / linux-job (gh)
  RuntimeError: Command docker exec -t 7db9c007e95bafc6b3d98c9b95cb68f3ed0541ddd6db906320b7f9fc362ca964 /exec failed with exit code 3

UNCLASSIFIED FAILURES - DrCI could not classify the following jobs because the workflow did not run on the merge base. The failures may be pre-existing on trunk or introduced by this PR:

• Build Aarch64 Linux Wheels / pytorch/executorch / build-wheel-py3_10-cpu-aarch64 (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  /__w/executorch/executorch/pytorch/executorch/backends/apple/coreml/runtime/inmemoryfs/inmemory_filesystem.cpp:722:48: error: ‘inmemoryfs::InMemoryFileSystem::InMemoryNode::Kind’ has not been declared
• Build Aarch64 Linux Wheels / pytorch/executorch / upload / upload-wheel-py3_10-cpu-aarch64 (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  Unable to download artifact(s): Artifact not found for name: pytorch_executorch__3.10_cpu_aarch64
• Build Windows Wheels / pytorch/executorch / build-wheel-py3_10-cpu (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  ImportError: DLL load failed while importing _portable_lib: The specified module could not be found.
• Build Windows Wheels / pytorch/executorch / upload / upload-wheel-py3_10-cpu (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  Unable to download artifact(s): Artifact not found for name: pytorch_executorch__3.10_cpu_x64
• trunk / test-models-macos-coreml (mobilebert) / macos-job (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• trunk / test-models-macos-cpu (mv3, xnnpack-quantization-delegation) / macos-job (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• trunk / test-models-macos-cpu (resnet50, xnnpack-quantization-delegation) / macos-job (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1

BROKEN TRUNK - The following job failed but were present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

• pull / unittest-buck / macos / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 3

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[Copilot]

Pull request overview

This PR updates the CI model test script to install YOLO26’s Python dependencies before running the portable export path, preventing failures when examples.portable.scripts.export imports the YOLO26 model code that requires ultralytics.

Changes:

• Add a MODEL_NAME == "yolo26" branch in .ci/scripts/test_model.sh to pip install examples/models/yolo26/requirements.txt prior to export.

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[zingo]

We could maybe do it more generic with something like this?

if [[ -f "examples/models/${MODEL_NAME}/requirements.txt" ]]; then
"${PYTHON_EXECUTABLE}" -m pip install --upgrade-strategy only-if-needed -r examples/models/${MODEL_NAME}/requirements.txt
fi

But then we need to have one to one mapping for models and folders so it might not work in all cases.