# Issue

**Title:** [v2] 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.


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## Task

Modify the repository so that the issue described above is resolved. The repository is checked out at base commit `23c202e1d1e0`. 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.