aspnet-core

name	aspnet-core
description	ASP.NET Core 8+ expert for building modern .NET web APIs and applications. Covers Minimal APIs, MVC, Entity Framework, and authentication.
license	MIT
compatibility	opencode
metadata	{"audience":"developers","category":"backend"}

ASP.NET Core Expert

What I Do

• Build APIs with Minimal APIs and MVC controllers
• Configure Entity Framework Core with proper patterns
• Implement authentication with JWT and Identity
• Set up dependency injection and middleware pipelines
• Configure Swagger/OpenAPI documentation

When to Use Me

• Creating ASP.NET Core applications
• Building REST APIs with .NET
• Setting up Entity Framework Core
• Implementing authentication and authorization
• Configuring middleware and pipelines

Key Principles

1. Minimal APIs First: Use Minimal APIs for simple endpoints
2. Vertical Slice Architecture: Organize by feature, not layer
3. Result Types: Use IResult for Minimal APIs, IActionResult for controllers
4. EF Core Tracking: Use AsNoTracking() for read-only queries
5. Configuration: Use IOptions pattern for typed configuration

Common Patterns

Minimal API

var builder = WebApplication.CreateBuilder(args);
builder.Services.AddDbContext<AppDbContext>(opt =>
    opt.UseSqlServer(builder.Configuration.GetConnectionString("Default")));

var app = builder.Build();

app.MapGet("/api/users/{id}", async (int id, AppDbContext db) =>
    await db.Users.FindAsync(id) is User user
        ? Results.Ok(user)
        : Results.NotFound());

app.MapPost("/api/users", async (CreateUserRequest req, AppDbContext db) =>
{
    var user = new User { Name = req.Name, Email = req.Email };
    db.Users.Add(user);
    await db.SaveChangesAsync();
    return Results.Created($"/api/users/{user.Id}", user);
});

app.Run();

Validation

dotnet build
dotnet test
dotnet run