Human DX optimizes for discoverability. Agent DX optimizes for predictability. What I learned building a CLI for agents first.

Ruby ports of the beloved Charm terminal libraries. Build glamorous TUIs, style terminal output, create beautiful forms, and make your Ruby CLIs sparkle.

Wouldn’t it be great if we could write tests for our Go CLI tools that are simple as shell scripts? The testscript package lets us do exactly that. Let’s take it for a spin.