Cursor has developed Bugbot, an AI-powered code review agent that identifies bugs, performance issues, and security flaws in pull requests before they reach production. Early versions struggled with accuracy, but iterative improvements have boosted its resolution rate from 52% to over 70%.

The tool evolved from simple heuristics to a sophisticated agentic architecture, allowing it to dynamically analyze code diffs. Internal experiments refined its ability to flag real issues while minimizing false positives. Cursor rebuilt core infrastructure in Rust for speed and reliability.

Teams now use Bugbot to enforce codebase-specific rules and track quality through a dashboard. With over two million PRs reviewed monthly, including at companies like Discord and Airtable, Cursor is adding autofix capabilities and continuous scanning. The next step is self-verifying bug reports.