admiral

Flags and arguments are defined with Crystal types like UInt32 or custom types via constructors, catching errors during compilation rather than runtime, as shown in the typed flags examples.

Supports nested commands via register_sub_command macro, making it easy to organize complex CLIs hierarchically, demonstrated in the sub-commands section with planetary and municipal examples.

Automatically creates help text with descriptions for flags and arguments using define_help, reducing manual boilerplate and ensuring consistency, as illustrated in the command help section.

Allows overriding default naming (e.g., underscore to hyphen), supports short/long flags, enumerable values, and custom types, per the additional flag options with description, default, and required settings.