To maintain codebase integrity when adding features: 1. Incremental Refactoring: Make small, manageable improvements without disrupting existing functionality. 2. Automated Testing: Build a robust test suite to catch regressions early. 3. Feature Toggles: Use toggles to safely integrate and test new features. 4. Modular Design: Decouple new components for easier maintenance and minimal impact. 5. Opportunistic Refactoring: Clean nearby code as you go to gradually reduce technical debt. 6. Code Reviews: Ensure new contributions follow best practices. 7. Documentation: Keep code and architecture well-documented to reduce future confusion.

To prevent new features from worsening legacy code technical debt, prioritize code refactoring alongside feature development. Implement unit tests for new code and consider refactoring existing code to improve readability and maintainability. Use code analysis tools to identify potential issues early and enforce coding standards. Document changes thoroughly to avoid future misunderstandings.

Working with legacy code is always a challenge but unavoidable. In my experience, these strategies can help and reduce technical debt: ??Code Reviews - Implement strict reviews to ensure new code follows best practices. ??Incremental Refactoring - When modifying code, improve existing code incrementally. ??Coding Standards - Establish and enforce standards for consistency and quality. ??Automated Testing - Use tests to catch issues early and maintain code integrity. ??Modular Design - Design new features to be decoupled from legacy code when possible. ??Continuous Integration - Automate testing and deployment to streamline processes. ??Allocate Time for Debt Reduction - Regularly set aside time to address existing technical debt.

Here a the best ways to ensure you are not adding technical debt by experts. 1.Refactor Incrementally: First of all if everything already works do not make massive changes to the functionality you should break and add small bits at a time to avoid the existing functionality. 2.Automate Testing: In your pipeline make sure that there are automated tests such that when you add new features and push to production, tests run first to avoid buggy code to production. 3.Code Reviews: Regularly reviewing your code can help catch potential debt early, and if caught early ensures consitency with and that the best practices and design patterns are followed.

To prevent new features from increasing technical debt in legacy code, start by understanding the existing code thoroughly. Before adding new features, evaluate how they will fit with the old code. Encourage your team to write clean and well-documented code for any new features. Implement a code review process where team members check each other's work to ensure quality. Prioritize refactoring the legacy code as needed to make it easier to work with. Use tests to verify that new features don’t break existing functionality. Lastly, keep communication open in your team to discuss challenges and solutions as they come up.