Yes. Over the last month, I've made heavy use of agentic coding (a bit of Junie and Amp, but mostly Antigravity) to ship https://www.ratatui-ruby.dev from scratch. Not just the website... the entire thing.

The main library (rubygem) has 3,662 code lines and 9,199 comment lines of production Ruby and 4,933 code lines and 710 comment lines of Rust. There are a further 6,986 code lines and 2,304 comment lines of example applications code using the library as documentation, and 4,031 lines of markdown documentation. Plus, 11,902 code lines and 2,164 comment lines of automated tests. Oh, and 4,250 lines in bin/ and tasks/ but those are lower-quality "internal" automation scripts and apps.

The library is good enough that Sidekiq is using it to build their TUI. https://github.com/sidekiq/sidekiq/issues/6898

But that's not all I've built over this timeframe. I'm also a significant chunk of the way through an MVU framework, https://rooibos.run, built on top of it. That codebase is 1,163 code lines and 1,420 comment lines of production Ruby, 4,749 code lines and 521 comment lines of automated tests. I need to add to the 821 code lines 221 comment lines of example application code using the framework as documentation, and to the 2,326 lines of markdown documentation.

It's been going so well that the plan is to build out an ecosystem: the core library, an OOP and an FP library, and a set of UI widgets. There are 6,192 lines of markdown in the Wik about it: mailing list archives, AI chat archives, current design & architecture, etc.

For context, I am a long-time hobbyist Rubyist but I cannot write Rust. I have very little idea of the quality of the Rust code beyond what static analyzers and my test suite can tell me.

It's all been done very much in public. You can see every commit going back to December 22 in the git repos linked from the "Sources" tab here: https://sr.ht/~kerrick/ratatui_ruby/ If you look at the timestamps you'll even notice the wild difference between my Christmas vacation days, and when I went back to work and progress slowed. You can also see when I slowed down to work on distractions like https://git.sr.ht/~kerrick/ramforge/tree and https://git.sr.ht/~kerrick/semantic_syntax/tree.

If it keeps going as well as it has, I may be able to rival Charm's BubbleTea and Bubbles by summertime. I'm doing this to give Rubyists the opportunity to participate in the TUI renaissance... but my ultimate goal is to give folks who want to make a TUI a reason to learn Ruby instead of Go or Rust.