Guy is building an operating system

https://x.com/geoffreyhuntley/status/2013518388333814143?s=12 Cursor built a web browser

Note Jan 20, 2026

🫡 Ralph OS: a vibe coded operating system

In this video, @markprobst showcases his newly developed operating system that runs on x86-64 architecture, featuring cooperative multithreading and no memory protection, all written in Rust with a custom bootloader in Assembler. Mike…
— geoff (@GeoffreyHuntley) January 20, 2026

Cursor built a web browser

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