As of October 2025, the AI code review capabilities known as Diamond have been rebranded under Graphite Agent, following its launch as a standalone product aimed at enhancing accessibility for teams using AI code generation tools. Diamond, initially part of the broader Graphite platform, is designed to integrate seamlessly with any GitHub workflow, offering free reviews for up to 100 pull requests per month, thereby benefiting startups until they scale. The tool specializes in expediting code review processes by reducing wait times significantly and providing customizable rules and contextual feedback. Diamond operates best when combined with the Graphite platform, which offers additional features such as stacked pull requests, automated merge queues, CI optimizations, and a unified PR inbox, collectively ensuring a streamlined, efficient development process. Diamond's introduction marks an evolution in the "outer loop" of development, enabling faster, smarter code reviews that align with the rapid pace of AI-driven code generation.