Integrate dice rolling into your commandline

rollit.ps1

function Invoke-Dice {
	[Alias('roll')]
	[CmdletBinding()]
	param (
		[int]
		$Size = 20,

		[int]
		$Count = 1
	)

	if ($global:__DiceRoll) {
		if ($PSBoundParameters.Keys -notcontains 'Size') { $Size = $global:__DiceRoll.Size }
		if ($PSBoundParameters.Keys -notcontains 'Count') { $Count = $global:__DiceRoll.Count }
	}

	$numbers = foreach ($n in 1..$Count) {
		1..$Size | Get-Random
	}

	$sum = ($numbers | Measure-Object -Sum).Sum
	'{0}: {1}' -f $sum, ($numbers -join ' + ')
}

$ExecutionContext.InvokeCommand.CommandNotFoundAction = {
	Param ($Name, $EventArgs)
	
	if ($Name.Trim('.\') -notmatch '^(?<count>\d+)D(?<size>\d+)$') { return }

	$global:__DiceRoll = @{
		Size = $matches.Size
		Count = $matches.Count
	}
	$EventArgs.Command = Get-Command Invoke-Dice
	$EventArgs.StopSearch = $true
}