I don't think I'd be able to do this on my own. Not that I don't know Rust, but because I don't know X11 (nor macOS or Windows) well enough to even know where to begin.
I've been a Linux user for almost two decades, so I know my way around my system, but never developed X11 applications or anything, I'm mostly a web developer who jumped around various roles through the years. Spent a lot of time caring deeply about testing, infrastructure, architecture/design and communication between humans, might have given me a slight edge in programming together with agents.
The prompts themselves were basically "I'd like this website to render correct: https://medium.com, here's how it looks for me in Firefox with JavaScript turned off: [Image], figure out what features are missing, add them one-by-one, add regression texts and follow REQUIREMENTS.md and AGENTS.md closely" and various iterations/variations of that, so I didn't expressively ask it to implement specific CSS/HTML features, as far as I can remember. Maybe the first 2-3 prompts I did, I'll upload all the session files in a viewable way so everyone can see for themselves what exactly went on :)