During October 2025, Eli Ben-Shoshan enhanced the onyx-dot-app/onyx repository by developing a feature to improve the reliability of object storage uploads. Eli implemented S3 Upload Checksums, enabling SHA256 checksums to be generated locally in Python before files are uploaded to AWS S3. This approach ensures that the ChecksumSHA256 is transmitted in the PutObject request, allowing for robust integrity verification of uploaded data. The work included introducing a configuration flag, S3_GENERATE_LOCAL_CHECKSUM, to control local checksum calculation. Eli’s contributions focused on backend development, checksumming, and cloud storage, addressing data integrity and auditability in storage operations through thoughtful engineering.