Argument

One entry in a command's arguments record. The key is the argument name, and the order of the entries is the order they are read from the command line.

Property	Type	Description
`schema`	`Schema`	Validates the value, and decides whether the argument is required and what it defaults to. Required.
`coerce?`	`CoerceMethod<...>`	Converts the terminal string into the type the schema expects. Not needed when that type is `string`.
`exclusive?`	`boolean`	The argument must appear on its own, apart from anything listed in `requires`.
`requires?`	`string[]`	Names that must also be provided when this argument is used. Names, not aliases.
`conflictWith?`	`string[]`	Names that cannot be provided together with this argument.
`meta?`	`ArgumentMeta`	Text used by help output and generated docs. Never changes behavior.

Arguments have no aliases, since they are matched by position rather than by name.

The definition check enforces two rules. With allowPositionals: true no argument may be optional, and with allowPositionals: false only the last one may be. Argument names also cannot be numeric. See Typed arguments.

ArgumentMeta

Property	Type	Description
`name?`	`string`	Overrides the name shown in help and docs. Otherwise the key is shown in kebab-case.
`description?`	`string`	Plain text. Supports multiple lines and ANSI colors. Preferred in terminal help.
`descriptionMarkdown?`	`string`	Markdown. Preferred in generated Markdown, and formatted when printed to a terminal.
`example?`	`string`	Shown under the description in help, inside a code block in Markdown.
`default?`	`string`	Default shown in help and docs. Does not change the real default. Empty string shows none.
`optional?`	`boolean`	Marks the argument optional or required in help and docs only.
`hidden?`	`boolean`	Leave the argument out of help and docs.