CodeRabbit offers a sophisticated AI-driven solution for reviewing massive and complex codebases by emphasizing the importance of context in code reviews. Unlike traditional diff-only reviews, which can miss crucial dependencies and lead to unexpected production issues, CodeRabbit builds a comprehensive understanding of the entire codebase, including its history and architecture. This approach allows it to identify cross-file issues, enforce coding standards, and provide feedback that reflects the entire system's intricacies. By constructing a detailed map of code dependencies and maintaining a semantic index of functions and changes, CodeRabbit aligns suggestions with existing implementations and standards, reducing rework and enhancing consistency. It integrates tools like linters and security analyzers, generating verification scripts to back its comments with evidence, thereby offering precise, actionable feedback. Designed to scale with enterprise-size repositories, CodeRabbit's context engineering approach ensures high-quality, low-noise reviews by assembling and filtering pertinent information before analyzing the changes, making it a reliable tool for maintaining and enhancing large and legacy codebases.