The Adafruit post is just an LLM recap of the author's blog post, which is an LLM summary of the project, which was vibe coded with Claude. The signal:noise ratio is dropping off exponentially.

Damn. I'm reading Nils Holm's book on a C subset compiler and was hoping this would be a neat supplement. Into the trashbin it goes

https://github.com/fosslinux/live-bootstrap

May have what you're looking for. Steps & tools used are in the "parts.rst" file.