Overview
Cursor successfully ran hundreds of autonomous AI coding agents for a week to build a functional web browser from scratch, generating over 1 million lines of code. This demonstrates AI agents can now tackle complex, large-scale software projects that were previously thought to require years of human development.
Key Facts
- Hundreds of concurrent agents coordinated on a single project - enabling massive parallel development at unprecedented scale
- Agents wrote over 1 million lines of code across 1,000 files in close to a week - compressing months of human work into days
- Built a functional web browser from scratch that can render Google.com and other websites - proving AI can handle the most complex software engineering challenges
- Uses planners, sub-planners, workers, and judge agents in coordination - creating the first practical autonomous software development pipeline
- Browser renders pages mostly correctly despite obvious glitches - showing AI-built software can achieve core functionality without wrapping existing engines
- Includes Git submodules with web specifications for agent reference - agents can now access and follow complex technical standards independently
Why It Matters
This represents a breakthrough in autonomous software development where AI agents can now build complex applications end-to-end, potentially accelerating software development timelines from years to weeks and making previously impossible projects feasible for small teams.