[chtruong814]

What does this PR do ?

ci: Skip coverage job for mcore triggered tests

The MCore triggered tests are now failing because the coverage e2e jobs are failing since only unit tests are ran during a PR. This just skips the coverage jobs if mcore refs are passed because they are not necessary for those workflows.

Example:
https://github.com/NVIDIA-NeMo/Megatron-Bridge/actions/runs/23274131634

Changelog

• Add specific line by line info of high level changes in this PR.

GitHub Actions CI

See the CI sectionin the Contributing doc for how to trigger the CI. A Nvidia developer will need to approve and trigger the CI for external contributors.

Before your PR is "Ready for review"

Pre checks:

• Make sure you read and followed Contributor guidelines
• Did you write any new necessary tests?
• Did you add or update any necessary documentation?
• Does the PR affect components that are optional to install? (Ex: Numba, Pynini, Apex etc)
  • Reviewer: Does the PR have correct import guards for all optional libraries?

If you haven't finished some of the above items you can still open "Draft" PR.

Additional Information

• Related to # (issue)

Summary by CodeRabbit

• Chores
  • Refined CI/CD coverage check conditions to improve workflow efficiency.

[coderabbitai]

📝 Walkthrough

Walkthrough

A conditional gate was added to the Coverage job in the CI/CD workflow to prevent execution when the workflow is dispatched using MCore. The job now requires github.event.inputs.mcore_ref to be empty.

Changes

Cohort / File(s)	Summary
Workflow Configuration .github/workflows/cicd-main.yml	Added condition github.event.inputs.mcore_ref == '' to the Coverage job's if gate to skip execution when MCore-dispatched workflows run.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: adding logic to skip the coverage job when MCore triggers the workflow, which directly matches the changeset modification to the CI workflow.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Test Results For Major Changes	✅ Passed	PR contains only minor CI/CD changes—a single-line addition to GitHub Actions workflow condition to skip Coverage job when MCore-triggered tests execute.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chtruong/fix-coverage-mcore

📝 Coding Plan

• Generate coding plan for human review comments

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[chtruong814]

Fast merging this to fix the MCore trigger tests as well as the sso user check