Building a Production-Ready CLI Tool with Go: From Zero to Distribution

Every developer has that moment: you write a quick script to check whether your APIs are alive, and six months later the whole team depends on it. The script grows flags, gains config files, and suddenly you're maintaining a tool that deserves proper packaging. If you've been there, Go is arguably the best language to rebuild it in. In this tutorial, we'll build healthcheck -- a CLI tool that monitors API health endpoints, reports status, and exits with appropriate codes for CI/CD integration. Along the way, we'll cover project scaffolding with Cobra, configuration management with Viper, testing strategies, and distribution through GoReleaser and Homebrew. By the end, you'll have a repeatable playbook for shipping any CLI tool to production. Why Go for CLI Tools Before writing a single line of code, it's worth understanding why Go has become the de facto language for CLI tools. Tools like kubectl , docker , gh , terraform , and hugo are all written in Go, and that's no coincidence. Sin