Worked on the DataDog/datadog-ci repository to enhance CI reliability and patch coverage reporting across multiple providers. Addressed challenges in shallow-clone environments by implementing proactive base-branch fetching, ensuring merge-base operations succeed and patch coverage is accurately reported. Introduced robust error handling with try/catch logic to gracefully manage fetch failures, maintaining compatibility with GitHub Actions and GitLab CI. Improved the coverage plugin’s test architecture by adding targeted unit tests, correcting a TypeScript key-type, and removing out-of-scope tests. Leveraged TypeScript, Git, and Jest to deliver more reliable coverage data, reduce CI noise, and streamline developer feedback within automated pipelines.