- Parse ZIP central directory to extract Unix file permissions
- Restore executable permissions using chmodSync after unpacking files
- Skip permission restoration on Windows (Unix-only feature)
- Add comprehensive test to verify executable and regular file permissions are preserved
- Fix test setup to use npm instead of yarn for consistent build process
Fixes issue where executable files lose their execute permissions after being packed and unpacked, which is critical for extensions containing binary executables or shell scripts.
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Co-authored-by: Claude <noreply@anthropic.com>
