Worked on code-quality improvements in TheAlgorithms/Python repository, focusing on enhancing the accuracy of type hints within the min_cost_string_conversion module. Addressed a bug by correcting incorrect type annotations, ensuring that string transformation operations are properly represented and reducing ambiguity around input and output expectations. This update improved the maintainability and readability of the codebase, supporting safer refactoring and facilitating easier onboarding for future contributors. Utilized Python for both programming and algorithm development, with particular attention to string manipulation techniques. The work contributed to more robust static analysis and set a foundation for higher code quality in subsequent development cycles.