Loading
Use when building .NET 8 applications with minimal APIs, clean architecture, or cloud-native microservices. Invoke for Entity Framework Core, CQRS with MediatR, JWT authentication, AOT compilation.
The skill file stays in the publisher's repository.
Paste the copied command in a terminal. It installs this SKILL.md into that agent.
npx skills add Jeffallan/claude-skills --skill dotnet-core-expert -a cursor -y
Use when building .NET 8 applications with minimal APIs, clean architecture, or cloud-native microservices. Invoke for Entity Framework Core, CQRS with MediatR, JWT authentication, AOT compilation.
dotnet build to verify compilation — if build fails, review errors, fix issues, and rebuild before proceedingdotnet test to confirm all tests pass — if tests fail, diagnose failures, fix the implementation, and re-run before continuing; verify endpoints with curl or a REST clientLoad detailed guidance based on context:
| Topic | Reference | Load When |
|---|---|---|
| Minimal APIs | references/minimal-apis.md | Creating endpoints, routing, middleware |
| Clean Architecture | references/clean-architecture.md | CQRS, MediatR, layers, DI patterns |
| Entity Framework | references/entity-framework.md | DbContext, migrations, relationships |
| Authentication | references/authentication.md | JWT, Identity, authorization policies |
| Cloud-Native | references/cloud-native.md | Docker, health checks, configuration |
<Nullable>enable</Nullable> in the .csprojawait dbContext.Users.ToListAsync()public record UserDto(int Id, string Name);WebApplicationFactory<Program>// Program.cs
var builder = WebApplication.CreateBuilder(args);
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();
builder.Services.AddMediatR(cfg => cfg.RegisterServicesFromAssembly(typeof(Program).Assembly));
var app = builder.Build();
app.UseSwagger();
app.UseSwaggerUI();
app.MapGet("/users/{id}", async (int id, ISender sender, CancellationToken ct) =>
{
var result = await sender.Send(new GetUserQuery(id), ct);
return result is null ? Results.NotFound() : Results.Ok(result);
})
.WithName("GetUser")
.Produces<UserDto>()
.ProducesProblem(404);
app.Run();
// Application/Users/GetUserQuery.cs
public record GetUserQuery(int Id) : IRequest<UserDto?>;
public sealed class GetUserQueryHandler : IRequestHandler<GetUserQuery, UserDto?>
{
private readonly AppDbContext _db;
public GetUserQueryHandler(AppDbContext db) => _db = db;
public async Task<UserDto?> Handle(GetUserQuery request, CancellationToken ct) =>
await _db.Users
.AsNoTracking()
.Where(u => u.Id == request.Id)
.Select(u => new UserDto(u.Id, u.Name))
.FirstOrDefaultAsync(ct);
}
// Infrastructure/AppDbContext.cs
public sealed class AppDbContext(DbContextOptions<AppDbContext> options) : DbContext(options)
{
public DbSet<User> Users => Set<User>();
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
modelBuilder.ApplyConfigurationsFromAssembly(typeof(AppDbContext).Assembly);
}
}
// Usage in a service
public async Task<IReadOnlyList<UserDto>> GetAllAsync(CancellationToken ct) =>
await _db.Users
.AsNoTracking()
.Select(u => new UserDto(u.Id, u.Name))
.ToListAsync(ct);
public record UserDto(int Id, string Name);
public record CreateUserRequest(string Name, string Email);
When implementing .NET features, provide:
Maintained by @jeffallan, Principal Consultant at Synergetic Solutions