Program.cs

using CommandLine;
using System.Reflection;
using TerminalUI.Verbs;

namespace TerminalUI
{
    public class Program
    {
        public static void Main()
        {
            Console.ResetColor();

            _ = Parser.Default.ParseArguments(new string[1] { "help" }, LoadVerbs());
            var env = new Environment();

            string? line;
            while ((line = Console.ReadLine()) != "exit")
            {
                if (line == string.Empty || line is null) continue;

                if (line == "clear" || line == "cls")
                {
                    Console.Clear();
                    continue;
                }

                var commandArgs = line!.Split(' ');
                env = Parser.Default.ParseArguments(commandArgs, LoadVerbs())
                    .MapResult(
                       (IVerb options) => options.Run(env),
                       errors => env
                    );

                Console.ResetColor();
            }
            env.Terminate();

            static Type[] LoadVerbs()
            {
                return Assembly.GetCallingAssembly().GetTypes()
                    .Where(t => t.GetCustomAttribute<VerbAttribute>() is not null).ToArray();
            }
        }
    }
}