spectre.console/src/Spectre.Console.Cli/Internal/DelegateCommand.cs

namespace Spectre.Console.Cli;

internal sealed class DelegateCommand : ICommand
{
    private readonly Func<CommandContext, CommandSettings, int> _func;

    public DelegateCommand(Func<CommandContext, CommandSettings, int> func)
    {
        _func = func;
    }

    public Task<int> Execute(CommandContext context, CommandSettings settings)
    {
        return Task.FromResult(_func(context, settings));
    }

    public ValidationResult Validate(CommandContext context, CommandSettings settings)
    {
        return ValidationResult.Success();
    }
}