Clean Code, Clean Architecture, and Sustainable Practices with Vibe Coding C# 13 in Enterprise Environments

Overview

There is a constant tension between the speed of delivery and long-term maintainability in enterprise software development. Companies want to release features faster, but that results in technical debt, brittle systems, and burned-out developers.

The idea of vibe coding is introduced in C# 13.

Vibe coding isn't just a catchy phrase. It's a mindset that combines the flow state of developers with clean code, clean architecture, and modern tools. Creating scalable, testable, and enjoyable software without sacrificing enterprise-level robustness is what we're all about.

Vibe coding emphasises developing software that meets business needs while also enhancing developer satisfaction and productivity. Its aim is to reduce burnout and technical debt while cultivating a positive development culture by emphasising maintainability, readability, and modern coding practices.

Enterprise Development Challenges

As a starting point, let's acknowledge the core challenges most enterprise teams face:

1. There is a rapid increase in code complexity

   • Over time, without structure, large enterprise systems become tangled "big balls of mud" spanning multiple domains-finance, HR, logistics, customer management.

2. Architectures that are rigid

   • The "classic 3-layered architecture" (UI + Business + Data) results in logic leaking across layers, creating hard-to-tangle dependencies.

3. Teams with inconsistent practices

   • Several large organisations have teams in different regions with different standards. Inconsistent naming conventions, testing styles, or branching strategies complicate integration.

4. Feedback loops that are slow

   • It can take weeks to validate a single change due to monolithic test suites and manual regression testing.

5. Burnout among developers

   • Developing in messy, fragile codebases reduces creativity and job satisfaction. Developers become firefighters rather than creators.

The Benefits of Clean Architecture and Vibe Coding

A striking transformation occurs when teams embrace clean code and clean architecture, powered by modern C# 13 features:

• Readable and Expressive Code: Developers can onboard faster and make fewer mistakes with readable and expressive code.

• Clear Separation of Concerns: Keeping business rules separate from infrastructure makes the changes easier.

• Testability: Core logic is unit-testable without reliance on databases or APIs.

• Scalability and Flexibility: The ability to add features without breaking older ones is now scalable and flexible.

• Team Cohesion: Global alignment of developers through shared coding charters.

• Developer Joy: The flow state is easier to reach when the code feels natural to the developer.

Vibe Coding in Enterprise Environments with C# 13

 Adopt a Clean Architecture as a foundation

Business rules are at the heart of Clean Architecture, popularised by Robert C. Martin. The key principle is that dependencies always point inward.

• Domain Layer: Entities, Value Objects, and Business Rules make up the domain layer.

• Application Layer: Use Cases and Domain Logic Orchestration at the application layer.

• Infrastructure Layer: Databases, APIs, and file storage are all part of the infrastructure layer.

• Presentation Layer: Controllers, UI, APIs make up the Presentation Layer.

By using this structure, you can protect the heart of your enterprise from external churn.

Make your code cleaner by using C# 13 features

A number of developer-friendly features have been added to C# 13 to enhance clean code practices:

Domain Entity (Immutable with Records)

namespace VibeCoding.Domain.Entities;
public record Customer(Guid Id, string Name, string Email);

Domain Repositories Interfaces

using VibeCoding.Domain.Entities;

namespace VibeCoding.Domain.Repositories;

public interface ICustomerRepository
{
    Task<Customer?> GetByIdAsync(Guid id);
    Task SaveAsync(Customer customer);
}

Infrastructure Repositories

using System.Text.Json;
using VibeCoding.Domain.Entities;
using VibeCoding.Domain.Repositories;

namespace VibeCoding.Infrastructure.Repositories;

public class InMemoryCustomerRepository : ICustomerRepository
{
    private readonly Dictionary<Guid, Customer> _customers = new();
    private readonly string _dataFilePath;

    public InMemoryCustomerRepository()
    {
        
        var basePath = AppContext.BaseDirectory;
        var jsonPath = Path.GetFullPath(Path.Combine(basePath, @"..\..\..\.."));
        _dataFilePath = Path.Combine(jsonPath, "VibeCoding.Data", "customers.json");

        if (File.Exists(_dataFilePath))
        {
            var json = File.ReadAllText(_dataFilePath);
            var customers = JsonSerializer.Deserialize<List<Customer>>(json, new JsonSerializerOptions
            {
                PropertyNameCaseInsensitive = true
            });

            if (customers is not null)
            {
                foreach (var c in customers)
                    _customers[c.Id] = c;
            }
        }
    }

    public Task<Customer?> GetByIdAsync(Guid id) =>
        Task.FromResult(_customers.TryGetValue(id, out var customer) ? customer : null);

    public Task SaveAsync(Customer customer)
    {
        _customers[customer.Id] = customer;

        var json = JsonSerializer.Serialize(_customers.Values, new JsonSerializerOptions { WriteIndented = true });
        File.WriteAllText(_dataFilePath, json);

        return Task.CompletedTask;
    }
}

Application Layer Primary Constructors for Service Class

using System.Net.Http.Json;
using VibeCoding.Domain.Entities;
using VibeCoding.Domain.Repositories;

namespace Vibe.Application.Services;

public class CustomerService(HttpClient httpClient, ICustomerRepository repository)
{
    private static readonly string[] _allowedRoles = ["Admin", "User", "Auditor"];
    public async Task<Customer?> GetCustomerAsync(Guid id, string role)
    {
        if (!_allowedRoles.Contains(role))
            throw new UnauthorizedAccessException($"Role {role} not allowed.");

        return await repository.GetByIdAsync(id)
            ?? await httpClient.GetFromJsonAsync<Customer>($"customers/{id}");
    }


}

•  Explicit dependencies are present.

• There is no extra boilerplate in the constructor.

Collection Literals

private static readonly string[] _allowedRoles = ["Admin", "User", "Auditor"]; 

• Syntax for initialisation that is cleaner.

Interceptors

• Code can be generated at compile time with interceptors (e.g., logging, validation).

Enhanced Span and Memory APIs

• Handling data streams safely and efficiently without sacrificing readability.

Feature	Example	Benefit
Primary Constructors	Public class CustomerService(HttpClient httpClient, ICustomerRepository)	Dependencies are Explicit
Collection Literals	Var roles =[“Admin”, “User”,”Auditor”];	Cleaner Initialisation Syntax
Interceptors	Compile-time code generation	Logging and Validation
Enhanced Span and Memory ApI’s	Streams	Safe and Efficient Data Handling
Above C# 13 Features Highlight, Examples and Benefits

  Create a Vibe Coding Charter

Vibe Coding Charters align the team on shared principles, capturing coding style, testing, and architecture agreements.

Example excerpt:

Vibe Coding Charter

·         Intent must come first, then performance.

·         There is no business logic in controllers or infrastructure.

·         When possible, use immutable records.

·         Dependency inversion is followed by all services.

·         A minimum of one automated test is required for all code changes.

Enterprise Order Processing API

It is difficult to test the API, and scaling is risky. The order processing API mixes business logic with database queries directly in controllers.

We separate concerns using clean architecture and vibe coding:

• Order rules at the domain layer.

• Workflows at the application layer.

• Persistence of infrastructure.

• Endpoints with thin controllers.

Domain Entity (Immutable with Records)

 using System.Text.Json.Serialization;

namespace VibeCoding.Domain.Entities;

[JsonConverter(typeof(JsonStringEnumConverter))]
public enum OrderStatus { Pending, Approved, Rejected }

public record Order(Guid Id, Guid CustomerId, decimal Amount, OrderStatus Status = OrderStatus.Pending)
{
    public Order Approve() => this with { Status = OrderStatus.Approved };
    public Order Reject() => this with { Status = OrderStatus.Rejected };
}

Domain Repositories Interfaces

using VibeCoding.Domain.Entities;

namespace VibeCoding.Domain.Repositories;

public interface IOrderRepository
{
    Task<Order?> GetByIdAsync(Guid id);
    Task SaveAsync(Order order);
}

Infrastructure Repositories

using System.Text.Json;
using VibeCoding.Domain.Entities;
using VibeCoding.Domain.Repositories;

namespace Vibe.Infrastructure.Repositories;

public class InMemoryOrderRepository : IOrderRepository
{
    private readonly Dictionary<Guid, Order> _orders = new();
    private readonly string _dataFilePath;

    public InMemoryOrderRepository()
    {
        var basePath = AppContext.BaseDirectory;
        var jsonPath = Path.GetFullPath(Path.Combine(basePath, @"..\..\..\.."));
        _dataFilePath = Path.Combine(jsonPath, "VibeCoding.Data", "orders.json");

        if (File.Exists(_dataFilePath))
        {
            var json = File.ReadAllText(_dataFilePath);
            var orders = JsonSerializer.Deserialize<List<Order>>(json, new JsonSerializerOptions
            {
                PropertyNameCaseInsensitive = true,
                Converters = { new System.Text.Json.Serialization.JsonStringEnumConverter() }
            });

            if (orders is not null)
            {
                foreach (var order in orders)
                    _orders[order.Id] = order;
            }
        }
    }

    public Task<Order?> GetByIdAsync(Guid id) =>
        Task.FromResult(_orders.TryGetValue(id, out var order) ? order : null);

    public Task SaveAsync(Order order)
    {
        _orders[order.Id] = order;

        var json = JsonSerializer.Serialize(_orders.Values, new JsonSerializerOptions { WriteIndented = true });
        File.WriteAllText(_dataFilePath, json);

        return Task.CompletedTask;
    }
}

Application Service

 using VibeCoding.Domain.Entities;
using VibeCoding.Domain.Repositories;
using VibeCoding.Domain.Shared;


namespace VibeCoding.Application.Services;

public class OrderService(IOrderRepository repository)
{
    public async Task<Result<Order>> ApproveAsync(Guid id)
    {
        var order = await repository.GetByIdAsync(id);
        if (order is null) return Result<Order>.Failure("Order not found");

        var updated = order.Approve();
        await repository.SaveAsync(updated);

        return Result<Order>.Success(updated);
    }
}

API Minimal Program.cs

using Vibe.Application.Services;
using Vibe.Infrastructure.Repositories;
using VibeCoding.Application.Services;
using VibeCoding.Domain.Repositories;
using VibeCoding.Infrastructure.Repositories;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddOpenApi();
builder.Services.AddScoped<ICustomerRepository, InMemoryCustomerRepository>();
builder.Services.AddScoped<IOrderRepository, InMemoryOrderRepository>();
builder.Services.AddScoped<CustomerService>();
builder.Services.AddScoped<OrderService>();
builder.Services.AddHttpClient<CustomerService>(client =>
{
    var baseUrl = builder.Configuration["VibeCodingApi:BaseUrl"];
    client.BaseAddress = new Uri(baseUrl!); 
});

var app = builder.Build();

if (app.Environment.IsDevelopment())
{
    app.MapOpenApi();
}

app.UseHttpsRedirection();


app.MapGet("/api/customers/{id:guid}",
    async (Guid id, string role, CustomerService service, ILogger<CustomerService> logger) =>
    {
        try
        {
            var customer = await service.GetCustomerAsync(id, role);
            return customer is not null ? Results.Ok(customer) : Results.NotFound();
        }
        catch (UnauthorizedAccessException ex)
        {
            logger.LogError(ex, "Unauthorized access for customer {CustomerId} with role {Role}", id, role);
            return Results.Forbid();
        }
        catch (Exception ex)
        {
            logger.LogError(ex, "Unexpected error fetching customer {CustomerId}", id);
            return Results.Problem("An unexpected error occurred.");
        }
    });

app.MapPost("/api/orders/{id:guid}/approve",
    async (Guid id, OrderService service, ILogger<OrderService> logger) =>
    {
        try
        {
            var result = await service.ApproveAsync(id);
            return result.IsSuccess ? Results.Ok(result.Value) : Results.NotFound(result.Error);
        }
        catch (Exception ex)
        {
            logger.LogError(ex, "Unexpected error approving order {OrderId}", id);
            return Results.Problem("An unexpected error occurred.");
        }
    });

app.Run();

appsettings.json

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft.AspNetCore": "Warning"
    }
  },
  
    "VibeCodingApi": {
      "BaseUrl": "https://localhost:7223"
    }
  
,
  "AllowedHosts": "*"
}

VibeCoding.Api.http

@VibeCoding.Api_HostAddress =https://localhost:7223

### Customers API test (requires role query string) 
GET {{VibeCoding.Api_HostAddress}}/api/customers/7b3a571b-d394-4b72-a219-0923e1852ddb?role=Admin
Accept: application/json



###

# Unauthorized role (should return 403)
GET {{VibeCoding.Api_HostAddress}}/api/customers/7b3a571b-d394-4b72-a219-0923e1852ddb?role=Guest
Accept: application/json

###

###  Approve orders using the Orders API
POST {{VibeCoding.Api_HostAddress}}/api/orders/cd6df2cb-530c-47cf-85dd-680ed71ad816/approve
Accept: application/json

Best Practices & Industry Standards

Combining vibe coding with proven practices will make it sustainable in enterprises:

1. SOLID Principles

   • Decoupling business from infrastructure is especially important with Dependency Inversion.

2. CQRS (Command–Query Responsibility Segregation)

   • For clarity and scalability, separate reads and writes.

3. Domain-Driven Design (DDD)

   • Enforce business rules using Value Objects (Email, Money).

   • Consistency is controlled by aggregates.

4. Automated Testing & CI/CD

   • Automated unit and integration tests are triggered for every pull request.

5. Static Analysis & Linters

   • To enforce consistency, use Roslyn analysers, SonarQube, and StyleCop.

6. Resiliency Patterns

   • The Polly library provides retries, circuit breakers, and fallback strategies.

Summary

The goal of C# 13 vibe coding isn't just to add syntax sugar, but to create a sustainable enterprise ecosystem that includes:

• Complexity, rigidity, and burnout are minimised.

• It maximises readability, scalability, and developer joy.

• Clean architecture, clean code, and a vibe coding charter provide the path forward.

A combination of modern language features, proven architectural patterns, and cultural alignment can move enterprises from survival mode to flow mode, where coding becomes less about firefighting and more about innovation.

Vibe coding in enterprise environments with C# 13 is all about that, and you can find the code examples for this article in my Ziggy Rafiq GitHub Repository . Please let me know your thoughts on this article.