Backend · Claude Code (via permissions.deny)
.NET 10 & C# 14 Minimal APIs .claudeignore
A .claudeignore for .NET 10 & C# 14 Minimal APIs: the paths Claude Code should stay out of, with matching permissions.deny rules.
- Path
- .claudeignore
- Loads
- Pattern list
- Format
- gitignore syntax
- Used by
- Claude Code (via permissions.deny)
What this file tells the agent
Claude Code reads files while it works. This .claudeignore keeps the list of .NET 10 & C# 14 Minimal APIs paths it should stay out of (build output, large binaries, logs and secrets). Copy the sensitive ones into permissions.deny in .claude/settings.json, which Claude Code enforces.
- Use current C# features: primary constructors, collection expressions, file-scoped namespaces, C# 14's field keyword, and nullable reference types (#nullable enable).
- Structure lightweight microservices with ASP.NET Core Minimal APIs using typed route groups and TypedResults return values.
- Enforce AsNoTracking() on read-only EF Core queries to eliminate memory overhead from change trackers.
- Validate request payloads using FluentValidation or MiniValidation before executing business logic.
- Use IHttpClientFactory with typed resilience pipelines (Polly) for outbound HTTP calls.
Code to avoid, and what to write instead
The rule steers the agent away from the left and toward the right.
// Discouraged: Nested namespaces, missing AsNoTracking, untyped object returns
namespace App.Controllers
{
public class UsersController : Controller
{
[HttpGet]
public IActionResult GetUser(Guid id)
{
var user = _context.Users.Find(id); // Untracked query tracking all state!
return Ok(user);
}
}
}namespace App.Features.Users;
using Microsoft.AspNetCore.Http.HttpResults;
using Microsoft.EntityFrameworkCore;
public record CreateUserRequest(string Email, string FullName);
public record UserDto(Guid Id, string Email, string FullName);
public static class UserEndpoints
{
public static RouteGroupBuilder MapUserEndpoints(this RouteGroupBuilder group)
{
group.MapGet("/{id:guid}", async Task<Results<Ok<UserDto>, NotFound>> (Guid id, AppDbContext db) =>
{
var user = await db.Users
.AsNoTracking()
.Where(u => u.Id == id)
.Select(u => new UserDto(u.Id, u.Email, u.FullName))
.FirstOrDefaultAsync();
return user is not null ? TypedResults.Ok(user) : TypedResults.NotFound();
});
return group;
}
}Install it in one command
- 01
Go to your project root
The file goes at .claudeignore, relative to the root.
- 02
Download the file
Run the command on the right. It downloads this preset and writes the file.
- 03
Make sure it gets used
Claude Code does not enforce .claudeignore by itself. Copy the sensitive paths into permissions.deny in .claude/settings.json, which it does enforce.
$ curl -fsSL "https://www.devscratchpad.tech/api/raw/claudeignore/csharp-dotnet-10" -o ".claudeignore"
writes .claudeignore
.claudeignore
To write the file from your own code instead, use Read your code or Convert Legacy Rules in the editor above.
More for .NET 10 & C# 14 Minimal APIs
Questions
- Does Claude Code honor .claudeignore?
- Not by itself. Claude Code enforces permission rules, so copy the sensitive paths into permissions.deny in .claude/settings.json, for example Read(./.env). Keep .claudeignore in the repository root as the reviewable list.
- What should I put in .claudeignore?
- Exclude large build caches, minified bundles, lockfiles, and environment files containing sensitive credentials.