Claude Fable 5 wrote a booting, NT-shaped Rust kernel in 38 minutes

[WhoCares]

The author puts some notes there:

Modern & safe by construction. unsafe is concentrated at the hardware boundary and in the intrusive data structures, each block with an explicit safety contract. SpinLock<T> owns its data and raises IRQL by construction, so the classic "touched shared state below DISPATCH_LEVEL" driver bug doesn't compile. Box/Vec/String work in-kernel and draw from NonPagedPool with the 'Rust' tag.

Originally Posted by chants

Very cool. In terms of safety, I do see 53 .rs files with "unsafe": https://github.com/search?q=repo%3Am...pe=code&l=Rust

So it seems safety guarantees are still not assured - there should be some sort of formal proof/verification metadata extension for Rust that allows unsafe regions to be proven safe. Otherwise I consider these to be "cheating"