Developed an SPI compatibility checker for the apache/pinot repository, focusing on automated detection of incompatible SPI changes before pull requests are merged. Leveraging Java and build automation tools, the work centered on implementing a japicmp-based plugin with configurable options and a baseline JAR for accurate comparison. The compatibility-checking logic was refined to minimize false positives and deliver actionable feedback to contributors, streamlining the review process. By integrating this solution into the CI/CD workflow, the project now surfaces potential SPI regressions early, reducing merge risk and accelerating onboarding for new contributors. The work demonstrates depth in plugin and API development.