Sarthak Gupta focused on release engineering for the instill-core repository, addressing reliability issues in the release workflow. He corrected inaccuracies in release tagging and last-release SHA tracking, ensuring that each release applied the correct tag and recorded the accurate commit SHA. By aligning these processes with CI/CD pipelines, Sarthak improved both the reproducibility and auditability of releases. His work involved targeted changes in Go and Shell, emphasizing DevOps and release management best practices. The updates, delivered through two commits, enhanced workflow stability and prevented future regressions, reflecting a methodical approach to maintaining repository standards and supporting reliable software delivery.