Worked on the pharmaverse/admiral repository to enhance the reliability and maintainability of key R functions, focusing on derive_param_computed and derive_vars_computed. Addressed a targeted bug by improving the clarity and formatting of warning messages, while also refactoring code to deduplicate filter condition messages and correct minor issues such as typos and CLI formatting. Migrated several unit tests to use expect_snapshot, added new test cases, and streamlined test organization to align with project standards. Contributed to software documentation by updating release notes and ensuring clear communication of changes. Utilized R programming, data analysis, and unit testing throughout the development process.