Over the past few years, the role of AI in software development has been a hot topic, particularly regarding its potential to enhance or replace human developers. While AI tools like GitHub Copilot can increase developer productivity by automating repetitive tasks such as documentation and code refactoring, they are not yet capable of replacing senior developers. AI-generated code requires thorough human review to maintain quality, as the output can be imperfect. Graphite has developed an AI code reviewer that automatically checks pull requests for errors and provides instant feedback, easing the review process and allowing developers to concentrate on more complex aspects of coding. Although initially met with skepticism, the AI reviewer has become integral to Graphite's code review process, helping catch both minor issues and significant bugs. However, human oversight remains essential, as AI reviewers cannot yet replace the critical thinking and expertise of human reviewers. Graphite envisions AI as an augmentative tool, complementing human engineers rather than replacing them.