ContextWithIO returns a child context with a ContextIO value added using the given Stdio equivalents.

ExactArgs returns an error if there are not exactly n args.

Execute takes a root Command plus arguments, finds the Command to run, parses flags, checks for expected arguments, and runs the Command.

Export wraps a function as a command.

MaxArgs returns an error if there are more than N args.

MinArgs returns an error if there is not at least N args.

RangeArgs returns an error if the number of args is not within the expected range.

HelpFuncs are used by the help templating system.

HelpTemplate is a template used to generate help.

Command is a command or subcommand that can be run with Execute.

CommandHelp wraps a Command to generate help.

Framework manages a root command, allowing Initializers to modify it, which by default runs a DefaultRunner.

Initializer is a hook to allow units to customize the root Command.

Runner is a unit that takes over the program entrypoint.

PositionalArgs is a function type used by the Command Args field for detecting whether the arguments match a given expectation.