How to present interactive CLI prompts in Swift

Swift is a great language for building command-line tools. Package managers, code generators, deployment scripts — they're all natural fits. But when it comes to collecting input from the user, the standard library leaves you with print and readLine , and not much else. The result is usually something like this: print ( "Enter your project name:" ) let name = readLine () ?? "" It works, but there's no placeholder to guide the user, no inline validation feedback, no way to present a list of choices, and no graceful handling of Ctrl+C. For anything beyond the simplest script, you end up writing infrastructure instead of features. Promptberry fills that gap. It's a Swift library for building interactive CLI prompts — text input, selects, confirmations, spinners, progress bars, and more. The most common prompt is text . It supports a placeholder shown when the field is empty, and an optional validate closure that returns an error message if the input is invalid. let name = try Promptberry