cfenollosa/os-tutorial ? reverse-engineered prompt

I want a simple step by step tutorial project that shows how to build a tiny operating system from scratch in small lessons.

Start from a bare boot sector, then move into 32 bit mode, switch from assembly to C, and gradually add things like screen output, keyboard input, interrupts, a basic shell, and a tiny growing libc. Keep each lesson very small and easy to follow, with short readmes and heavily commented code so someone can learn by doing.

Make it something I can run in an emulator, with each folder building on the one before it. I’d like the whole thing to feel like a hands on course, not a big theory heavy textbook, and it should be okay to experiment and break things as I go. If you need to check current setup details or best practices online, feel free to look them up.