Tw Nuru

my-cli/
├── my-cli.cs             # Entry point runfile
├── Directory.Build.props # Includes endpoints/**/*.cs into compilation
├── behaviors/
│   └── *.cs              # Pipeline behaviors
├── endpoints/
│   └── *.cs              # One endpoint class per file
└── services/
    └── *.cs              # Injected services

NuruApp app = NuruApp.CreateBuilder()
  .DiscoverEndpoints()
  .AddRepl(options =>
  {
    options.AutoStartWhenEmpty = true;
  })
  .Build();

return await app.RunAsync(args);

[NuruRoute("greet", Description = "Greet someone")]
public sealed class GreetQuery : IQuery<Unit>
{
  [Parameter(Description = "Name of the person to greet")]
  public string Name { get; set; } = string.Empty;

  public sealed class Handler : IQueryHandler<GreetQuery, Unit>
  {
    public Task<Unit> Handle(GreetQuery query, CancellationToken ct)
    {
      Console.WriteLine($"Hello {query.Name}");
      return Unit.Task;
    }
  }
}

[NuruRoute("deploy", Description = "Deploy to an environment")]
[NuruRouteExample("deploy prod", Description = "Deploy to production")]
[NuruRouteExample("deploy staging --dry-run")]
public sealed class DeployCommand : ICommand<Unit> { /* ... */ }

[NuruRoute("deploy", Description = "Deploy to an environment")]
public sealed class DeployCommand : ICommand<Unit>
{
  [Parameter(Order = 0, Description = "Target environment")]
  public string Env { get; set; } = string.Empty;

  // Optional parameter: use nullable type (string?), NOT IsOptional=true
  [Parameter(Order = 1, Description = "Optional tag to deploy")]
  public string? Tag { get; set; }

  public sealed class Handler : ICommandHandler<DeployCommand, Unit>
  {
    public Task<Unit> Handle(DeployCommand command, CancellationToken ct)
    {
      Console.WriteLine($"Deploying to {command.Env}");
      return Unit.Task;
    }
  }
}

[NuruRoute("build", Description = "Build a project")]
public sealed class BuildCommand : ICommand<Unit>
{
  [Parameter(Description = "Project to build")]
  public string Project { get; set; } = string.Empty;

  [Option("mode", "m", Description = "Build mode (Debug or Release)")]
  public string Mode { get; set; } = "Debug";

  [Option("verbose", "v", Description = "Verbose output")]
  public bool Verbose { get; set; }

  public sealed class Handler : ICommandHandler<BuildCommand, Unit>
  {
    public Task<Unit> Handle(BuildCommand command, CancellationToken ct)
    {
      Console.WriteLine($"Building {command.Project} ({command.Mode}, verbose: {command.Verbose})");
      return Unit.Task;
    }
  }
}

[NuruRoute("exec", Description = "Run with arbitrary arguments")]
public sealed class ExecCommand : ICommand<Unit>
{
  [Parameter(IsCatchAll = true, Description = "Arguments")]
  public string[] Args { get; set; } = [];

  public sealed class Handler : ICommandHandler<ExecCommand, Unit>
  {
    public Task<Unit> Handle(ExecCommand command, CancellationToken ct)
    {
      Console.WriteLine($"Args: {string.Join(" ", command.Args)}");
      return Unit.Task;
    }
  }
}

// Base class defines the "docker" prefix
[NuruRouteGroup("docker")]
public abstract class DockerGroupBase;

// Matched by: myapp docker build . --tag foo
// App receives args: ["docker", "build", ".", "--tag", "foo"]
[NuruRoute("build", Description = "Build an image from a Dockerfile")]
public sealed class DockerBuildCommand : DockerGroupBase, ICommand<Unit>
{
  [Parameter(Description = "Path to Dockerfile or build context")]
  public string Path { get; set; } = string.Empty;

  [Option("tag", "t", Description = "Name and optionally a tag")]
  public string? Tag { get; set; }

  [Option("no-cache", null, Description = "Do not use cache")]
  public bool NoCache { get; set; }

  public sealed class Handler : ICommandHandler<DockerBuildCommand, Unit>
  {
    public Task<Unit> Handle(DockerBuildCommand command, CancellationToken ct)
    {
      Console.WriteLine($"Building image from: {command.Path}");
      return Unit.Task;
    }
  }
}

[NuruRouteGroup("cloud")]
public abstract class CloudGroupBase;

[NuruRouteGroup("azure")]
public abstract class AzureGroupBase : CloudGroupBase;

[NuruRouteGroup("storage")]
public abstract class AzureStorageGroupBase : AzureGroupBase;

// Matched by: myapp cloud azure storage upload myfile.txt
[NuruRoute("upload", Description = "Upload a file to Azure storage")]
public sealed class AzureStorageUploadCommand : AzureStorageGroupBase, ICommand<Unit>
{
  [Parameter(Description = "File to upload")]
  public string File { get; set; } = string.Empty;

  public sealed class Handler : ICommandHandler<AzureStorageUploadCommand, Unit>
  {
    public Task<Unit> Handle(AzureStorageUploadCommand command, CancellationToken ct)
    {
      Console.WriteLine($"Uploading: {command.File}");
      return Unit.Task;
    }
  }
}

[NuruRouteGroup("docker")]
public abstract class DockerGroupBase
{
  [GroupOption("verbose", "v", Description = "Verbose output")]
  public bool Verbose { get; set; }
}

// Both DockerBuildCommand and DockerRunCommand inherit --verbose/-v from DockerGroupBase

// Full edition - all commands
NuruApp.CreateBuilder()
  .DiscoverEndpoints()
  .Build();

// Kanban-only edition - "ganda" prefix stripped, only kanban commands
NuruApp.CreateBuilder()
  .DiscoverEndpoints(typeof(KanbanGroup))
  .Build();

// Multiple groups - OR logic
NuruApp.CreateBuilder()
  .DiscoverEndpoints(typeof(KanbanGroup), typeof(GitGroup))
  .Build();

my-cli/
├── Directory.Build.props       # Includes ganda/endpoints/** for all editions
├── ganda/
│   ├── ganda.cs                # Full edition entry point
│   └── endpoints/              # Shared command files (one per file)
│       ├── ganda-group.cs
│       ├── kanban-group.cs
│       ├── kanban-add-command.cs
│       └── git-commit-command.cs
├── kanban/
│   └── kanban.cs               # .DiscoverEndpoints(typeof(KanbanGroup))
└── git/
    └── git.cs                  # .DiscoverEndpoints(typeof(GitGroup))

public sealed class Handler : ICommandHandler<DeployCommand, Unit>
{
  public async Task<Unit> Handle(DeployCommand command, CancellationToken ct)
  {
    if (failed)
    {
      Terminal.WriteErrorLine("Deployment failed");
      Environment.ExitCode = 1;
    }
    return Unit.Value;
  }
}