Go CLI

Build CLI tools with the stdlib flag package first. It handles 90% of cases without a third-party dependency. Reach for cobra or urfave-cli only when the help output or subcommand tree exceeds what flag can present cleanly.

Project layout

For a single binary:

mycli/
├── main.go
├── go.mod
└── .golangci.yml

For multi-binary repos or tools that grow subcommand modules: