Code review in the age of AI: Why developers will always own the merge button

The evolution of code reviews in the context of AI tools, particularly GitHub Copilot, highlights a shift in how developers approach the review process. While the core purpose of code reviews—ensuring code quality, sharing knowledge, and maintaining long-term maintainability—remains unchanged, AI can streamline the process by handling routine tasks like spotting syntax issues and style inconsistencies. GitHub's research indicates that AI should be used to augment developer judgment rather than replace it, as decisions related to architecture, mentorship, and ethics still require human insight. Developers are encouraged to utilize AI for initial reviews to catch simple errors, allowing them to focus on nuanced issues that demand deeper understanding. The responsibility for code remains with the developer, who must ensure that AI-generated code adheres to team standards and integrates seamlessly with existing codebases. As AI tools evolve, teams should continuously refine guidelines and encourage open discussions to effectively incorporate AI into their review processes, ensuring that developer judgment remains central to decision-making.