Show HN: I built an Open-Source Cursor Agent, with Cursor

I just released a simple, open-source version of Cursor Coding Agents. You give it a user request and a code base, and it’ll explore directories, search files, read them, edit them, or even delete them—all on its own!

I built this using the leaked Cursor system prompt (plus my own guesses about how Cursor works). It’s missing a few features like code indexing, but it still runs smoothly on the latest Sonnet 3.7 thinking model. Everything is minimal and fully open sourced, so you can customize it and add your own knowledge. If you’re curious about how I built it, I made a full step-by-step video tutorial. Enjoy!