Worked on the nobl9-go repository to enhance the reliability and data integrity of SLO History reporting. Focused on backend development using Go, the work centered around implementing robust validation logic for time frame options in SLO History reports. By enforcing valid time units and counts for both rolling and calendar frames, as well as adding comprehensive date range checks, the changes reduced the risk of inconsistent analytics and incorrect reporting. This approach tightened input validation at the API level, ensuring that only valid data enters the reporting pipeline and enabling more trustworthy dashboards and business decisions for end users.