https://nalar.dev/tags/maintainability/ Recent content in Maintainability on Nalar Hugo en-us Wed, 02 Sep 2026 00:00:00 +0700 https://nalar.dev/parallel-change-for-safe-interface-refactoring/ Wed, 02 Sep 2026 00:00:00 +0700 https://nalar.dev/parallel-change-for-safe-interface-refactoring/ <p>Changing a shared interface is risky when many callers depend on it. A large &ldquo;update everything at once&rdquo; patch can work in a small codebase, but it becomes harder to review, deploy, and roll back as dependencies spread across modules or services.</p> <p>Parallel change is a refactoring technique that keeps old and new interfaces working side by side for a limited period. The migration happens in three stages: expand, migrate, and contract.</p>