We're building a self-improving IDE for running coding agents in parallel. Tens of thousands of engineers use it as their main IDE, at companies like Netflix, DoorDash and Wix. It’s source-available: https://github.com/superset-sh/superset. We’re 4 people, including 3 ex-YC CTOs. The work goes from the pty and stream transport up to the UI, all TypeScript.