Cursor is an AI-first code editor built on VS Code that goes beyond autocomplete to understand entire codebases and reason about complex software architecture. Its Agent mode can implement complete features across multiple files, debug failing tests, and make coordinated changes throughout a codebase from a single natural language instruction. Cursor supports all VS Code extensions and keybindings, making migration seamless for developers who want to retain their existing workflow while gaining AI capabilities that go fundamentally beyond what Copilot or other autocomplete tools can do.