Package flags provides a powerful, reflection-based way to generate modern command-line interfaces (CLIs) from Go structs. It uses spf13/cobra for command execution and rsteube/carapace for advanced shell completion. The primary workflow is to define your CLI structure (commands, flags, positional arguments) using Go structs and field tags, and then call flags.ParseCommands() to create a fully configured *cobra.Command tree, complete with shell completions, ready for execution. For useful, pre-built flag types like Counter or HexBytes, see the subpackage at "github.com/reeflective/flags/types".