| # Issue | |
| **Title:** Fix parent reference warning | |
| ## Description | |
| *Issue #, if available:* | |
| *Description of changes:* | |
| Improves the parent-directory reference check in the S3 download path so that compare keys with a leading slash (e.g. `/../foo`) are correctly flagged. | |
| The compare key is now anchored against the destination directory root before `os.path.normpath()` is applied, preventing the leading slash from collapsing the `..` segment away. | |
| By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice. | |
| ## Task | |
| Modify the repository so that the issue described above is resolved. The repository is checked out at base commit `bc427faf6cff`. Edit files in place; the verifier captures your changes via `git diff` and scores them against an oracle patch using SWE-RL-style diff-similarity reward. |