Worked on the flowr-analysis/flowr repository to deliver validation for resolvesToBuiltInConstant within abstract domains, focusing on robust handling of built-in constants such as TRUE, FALSE, and NULL. The implementation included comprehensive tests to verify positive, negative, and indeterminate resolution cases, ensuring correctness and reliability in static analysis workflows. Leveraged TypeScript and applied skills in abstract interpretation, code refactoring, and testing to enhance maintainability. The work also involved targeted cleanup of the environment builder and resolve tests, along with minor documentation improvements, resulting in clearer code structure and improved test coverage for built-in constant resolution scenarios within the project.