Moreno Garcia developed the CelerData Doctor Diagnostic Tool for the StarRocks/starrocks repository, focusing on enhancing cluster observability and support workflows. The tool automates the collection of cluster metadata and performance indicators using Python scripting, enabling proactive identification of potential performance issues. By generating a compressed diagnostic archive, Moreno streamlined troubleshooting and accelerated support response times. The work leveraged skills in data analysis, database administration, and system monitoring to strengthen StarRocks cluster reliability. Although the contribution spanned a single feature over one month, the depth of engineering addressed core diagnostic needs and improved the overall support readiness of the platform.