Build Go CLIs with Cobra and Viper using structured command and configuration patterns.
npx skills add https://github.com/omarluq/og-template --skill golang-cli-omarluq
Please help me install this Agent Skill. Skill: golang-cli Source: https://github.com/omarluq/og-template/tree/main/.agents/skills/golang-cli Command: npx skills add https://github.com/omarluq/og-template --skill golang-cli-omarluq
Go developers often struggle to create maintainable, testable command-line interfaces. This skill provides a structured blueprint for building Go CLIs with Cobra and Viper, covering root and subcommands, flag binding, configuration layering, and testing patterns.
Create a minimal Go CLI using Cobra and Viper with a root command and a sample subcommand, following the recommended project structure.
High-intent search queries and answers about installing and using this skill.
A structured Go CLI project uses a cmd/ directory with a minimal main.go entry point to separate command wiring from business logic. This layout ensures predictable builds, clear I/O semantics, and testable command behavior.
Configuration layering in Viper binds command flags to establish a strict precedence across environment variables, config files, and local or persistent flags. This mechanism ensures predictable, environment-driven configuration for your Go CLI application.
Testing Cobra command behavior requires clear I/O semantics and strict exit code handling to verify command outputs accurately. Standard testing patterns isolate subcommand logic, ensuring predictable and maintainable test coverage for your CLI.
Persistent flags apply globally to a parent command and all its subcommands, while local flags apply only to the specific command they define. Cobra wires these flag types distinctly to manage configuration layering.
You inject version information into a Go CLI during builds using ldflags to set variables at compile time. This approach integrates with Cobra's root command setup to expose version details predictably.
Handling environment variables in a Cobra and Viper Go CLI involves binding flags to Viper to automatically map environment inputs into the configuration layer. This establishes proper precedence and ensures environment-driven configuration.
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