Working Effectively with Legacy Code Understand the codebase: Study the existing code to grasp its structure, dependencies, and potential issues. Test thoroughly: Implement comprehensive testing to identify and fix bugs, ensuring code stability. Refactor gradually: Make small, incremental changes to improve code readability and maintainability without breaking functionality. Use modern tools: Leverage code analysis tools, version control systems, and automated testing frameworks to streamline development. * Seek external support: Consider consulting with experienced developers or using online resources for guidance and best practices.