Developed a redundant type conversion linting feature for the facebook/pyrefly repository, targeting unnecessary str, int, and float conversions in Python code. The solution introduced a new lint rule that detects and warns when values are converted to their own type, reducing runtime overhead and improving code quality. The implementation involved extending the static analysis framework in Rust, integrating the new lint with existing rules, and providing comprehensive test coverage for both redundant and non-redundant cases. Documentation and error messaging were updated to reflect the new feature, ensuring clarity for users and maintainers. All changes were delivered through a reviewed pull request.