Add CLA workflow

[glenn-jocher]

Summary

• add the canonical public CLA workflow with the standard Ultralytics license header
• use ultralytics/actions/cla@main so repositories inherit shared fixes automatically
• route actionable events at the job boundary and grant only actions: write and pull-requests: write
• keep the ledger PAT isolated to the CLA step and central ultralytics/cla repository

Deleted: nothing. No CLA workflow or repository-local equivalent existed; organization-wide CLA enforcement cannot be achieved by deletion or relocation in this repository.

Reused: the canonical ultralytics/actions/.github/workflows/cla.yml structure and shared ultralytics/actions/cla@main implementation.

Validation

• byte-for-byte comparison with the reviewed ultralytics/actions/.github/workflows/cla.yml template
• actionlint .github/workflows/cla.yml
• npx prettier --write .github/workflows/cla.yml
• license-header, shared-main-action, and token-input scan
• git diff --check

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Adds an automated Contributor License Agreement (CLA) workflow for managing pull request contributions. 🤝

📊 Key Changes

• Introduces a new .github/workflows/cla.yml GitHub Actions workflow.
• Automatically checks CLA status when pull requests are opened, reopened, or updated.
• Allows contributors to trigger a CLA recheck by commenting recheck or confirming the CLA signature.
• Uses the shared ultralytics/actions/cla@main action to handle verification and signing.
• Adds workflow permissions for updating actions and pull requests.
• Prevents overlapping CLA checks for the same pull request through concurrency control.

🎯 Purpose & Impact

• Simplifies CLA compliance for contributors and maintainers. ✅
• Helps ensure contributions meet Ultralytics licensing requirements before merging.
• Reduces manual review and follow-up for unsigned or incorrectly registered contributors.
• Improves consistency and reliability of the pull request process with automated checks.

[UltralyticsAssistant]

👋 Hello @glenn-jocher, thank you for submitting a ultralytics/mkdocs 🚀 PR! This automated checklist helps streamline review, and an engineer will assist with any questions. Please review the following:

• ✅ Define a Purpose: Clearly explain the purpose of your fix or feature in your PR description, and link to any relevant issues. Ensure your commit messages are clear, concise, and adhere to the project's conventions.
• ✅ Synchronize with Source: Confirm your PR is synchronized with the ultralytics/mkdocs main branch. If it's behind, update it by clicking the 'Update branch' button or by running git pull and git merge main locally.
• ✅ Ensure CI Checks Pass: Verify all Ultralytics Continuous Integration (CI) checks are passing. If any checks fail, please address the issues.
• ✅ Update Documentation: Update the relevant documentation for any new or modified features.
• ✅ Add Tests: If applicable, include or update tests to cover your changes, and confirm that all tests are passing.
• ✅ Sign the CLA: Please ensure you have signed our Contributor License Agreement if this is your first Ultralytics PR by writing "I have read the CLA Document and I sign the CLA" in a new message.
• ✅ Minimize Changes: Limit your changes to the minimum necessary for your bug fix or feature addition. "It is not daily increase but daily decrease, hack away the unessential. The closer to the source, the less wastage there is." — Bruce Lee
  For more guidance, please refer to our Contributing Guide. Don't hesitate to leave a comment if you have any questions. Thank you for contributing to Ultralytics! 🚀

[UltralyticsAssistant]

🔍 PR Review

_{Made with ❤️ by Ultralytics Actions}

The workflow otherwise follows the action's documented trigger, permission, and token configuration, but the pinned action revision has a verified comment-selection bug that can overwrite unrelated GitHub Actions comments.

💬 Posted 1 inline comment

[UltralyticsAssistant]

🎉 Thank you, @glenn-jocher, for this valuable contribution—and congratulations on the merge!

“Great things are done by a series of small things brought together.” — Vincent van Gogh

By adding automated CLA checks, recheck support, and reliable concurrency controls, this PR makes contribution compliance smoother and more consistent for everyone. Your work helps create a stronger, more welcoming open-source workflow for the Ultralytics community! 🤝