SwiftTUI is a framework for building terminal user interfaces (TUIs) using Swift with a declarative syntax modeled on SwiftUI. The source shows a minimal counter app: you write a `View` struct with `@State`, compose UI elements like `VStack`, `Button`, and `TextFigure` (with font support), then wrap it in an `App` entry point. The framework appears to handle rendering, event handling, and layout automatically. No details given about rendering backend, platform support, performance characteristics, or how the ripple animation mentioned in the example actually works—the source only shows the code without animations. This looks early-stage; the approach is sound for developers comfortable with SwiftUI patterns who want CLI tools, but the source doesn't explain why you'd pick this over established alternatives like Bubble Tea or Charmbracelet's Huh.