It appears that there is no specific information about the Pull Request (PR) you would like summarized, as it is marked as “undefined.” However, I can guide you on how to summarize a typical Pull Request for a project like thanos-io/thanos.

To create an effective summary, consider including the following key components:

  1. Title of the PR: Clearly state the title to convey the main focus.

  2. Objective: Explain the purpose of the PR, what problem it aims to solve, or what new feature it introduces.

  3. Key Changes: Outline the major changes made in the code, highlighting any new files, significant modifications, or critical logic added.

  4. Impact: Discuss how these changes affect the project, whether they introduce new functionality, fix bugs, or improve performance.

  5. Testing: Mention any tests added or modified to support the changes, including results of the tests if applicable.

  6. Related Issues: Reference any associated issues or discussions in the repository that prompted this PR.

  7. Review Notes: Include any particular areas where feedback is requested or where the authors are unsure.

If you can provide more detail about the PR, I would be happy to help craft a specific and relevant summary.