fix(ci): resolve local actions from workflow commit

[sara4dev]

Summary

• Resolve the three shared pytest-local invocations with GitHub self-repository syntax ($/...).
• Load the action from the workflow repository at the exact running commit instead of the coordinator workspace.
• Restore local composite actions when kubernetes-novolume places coordinator and job pods on different nodes.

Related: OPS-3075

How it works

This does not move test execution into the coordinator pod. With ./..., the runner tries to load action.yml from the coordinator $GITHUB_WORKSPACE, but checkout populated only the separate job pod workspace.

With $/..., the coordinator resolves the action from ai-dynamo/dynamo at the workflow SHA and downloads it under _work/_actions. The coordinator can then load and expand the composite action without a local checkout, while the kubernetes-novolume hook executes its run: steps inside the GPU job pod. Checkout and pytest therefore remain in the job pod.

Coordinator pod: resolve action -> load action.yml -> coordinate steps
GPU job pod:    checkout repository -> execute action steps -> run pytest

See GitHub self-repository action syntax.

Validation

• pre-commit run --files .github/workflows/shared-test.yml
• H100 canary: passed on runner 2.336.0; detected NVIDIA H100; collected 486 tests with exit code 0; coordinator and job pod ran on different nodes.
• GB200 canary: passed on runner 2.336.0; detected NVIDIA GB200 on arm64; collected 486 tests with exit code 0; coordinator and job pod ran on different nodes.
• Production-style H100 KVBM job: resolved all three actions from _actions at commit 14e955a, entered real pytest execution, and passed three KVBM tests before a later unrelated request assertion failure.

[datadog-official]

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[devin-ai-integration]

Devin Review found 1 potential issue.

[coderabbitai]

Walkthrough

The shared test workflow updates the local pytest-local action reference in CPU-only, parallel GPU, and sequential GPU test steps.

Changes

Test action references

Layer / File(s)	Summary
Shared test action paths .github/workflows/shared-test.yml	The CPU-only, parallel GPU, and sequential GPU test steps change the local pytest-local action reference from ./.github/actions/pytest-local to $/.github/actions/pytest-local.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Merge Risk: 🟡 Moderate · up to f5b33

The workflow now loads local actions from the running commit, but its new $/ references are not accepted by the stated actionlint version. A narrowly scoped lint exception is still needed to avoid CI validation failure before merge; runner compatibility should also remain owner-confirmed.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the main CI change: resolving local actions from the workflow commit.
Description check	✅ Passed	The description explains the CI fix, affected invocations, issue context, and validation results, although it does not use every template heading.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0 files. (1 skipped: 1 unsupported.)
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[coderabbitai]

Actionable comments posted: 1

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Inline comments:
In @.github/workflows/shared-test.yml:
- Line 212: Add a narrowly scoped actionlint ignore covering only the $/
references in the workflow, using the repository’s existing ignore mechanism if
available. Leave the pytest-local action references unchanged.

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• .github/workflows/shared-test.yml

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[github-actions]

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