Automating React Router v6 to v7 Migration with AST Codemods

🔬 Case Study: Engineering a Zero-Fault React Router v7 Codemod How we built an AST-powered migration engine that transforms entire codebases with zero false positives — and what we learned along the way. Table of Contents The Challenge Why Regex Fails Our Solution: AST-Based Transforms Architecture Deep-Dive Engineering Highlights Real-World Validation Lessons Learned Conclusion 💥 The Challenge React Router v7 is one of the most impactful major releases in the React ecosystem. It introduced fo