Cursor builds a Rust OS that boots on real hardware

The developer behind SmileyOS describes using Cursor to build a real educational operating system rather than a browser imitation. The intended users are children learning programming in an offline environment. The author says the project took a month and nearly €3,000 in AI subscriptions, producing roughly 100,000 lines of Rust with Cursor and Claude Opus 4.5 Max.

The system includes a bootloader, graphics stack, persistent filesystem, terminal and a small programming language with shell, game and application modes. An integrated editor and progressive lessons let users run programs without rebuilding the operating system. The concrete hardware claim is a successful test on a Dell Inspiron 910, with i686 described as fully working. Other listed architectures include abstraction work, so the account should not be read as proving equal hardware support across all targets.

The author chose the educational scope and reports testing the resulting system, but does not publish a detailed approval or quality-assurance sequence in this forum post. The useful pattern is to anchor an ambitious generated project to a bootable target and a demonstrable user workflow. Code volume and spending are reported development facts, not evidence of reliability, security or suitability for children without further review.

Prompt
Suggested prompt (written by Agents In Use, not the author's)

Source: Cursor Community Forum · smileytech.mk on Cursor Community Forum