Worked on the heroku/libcnb.rs repository to enhance test reliability and streamline CI/CD processes. Addressed flaky doctests in libherokubuildpack by replacing an external URL with a locally managed LICENSE file, ensuring deterministic test outcomes and updating the SHA-256 digest to match the new content. Improved CI efficiency by disabling the man-db auto-update trigger in GitHub Actions, which reduced bottlenecks during apt-get installs and led to faster build times. Utilized Rust and YAML to implement these changes, applying skills in Buildpacks, CI/CD, and automated testing to deliver more stable and efficient development and deployment workflows.