.NET 8 & C# 12 Minimal APIs AGENTS.md Generator | Free & Offline

Production-grade architectural rulebook for .NET 8 & C# 12 Minimal APIs. Engineered to eliminate LLM hallucinations, enforce strict deterministic conventions, and prevent architectural drift across Cursor IDE, Claude Code CLI, and autonomous multi-agent pipelines.

Target Path
AGENTS.md
Execution Scope
Multi-Agent Root Invariants
Specification Format
Agent Standard (.md)
AI Tool Support
Antigravity, Codex & Windsurf
02 / DRIFT ANALYSIS & VALUE PROPOSITION

Failure Patterns Prevented for .NET 8 & C# 12 Minimal APIs

Without This Rule (Default LLM Behavior)Vulnerable

C# 12 and .NET 8 introduce primary constructors, collection expressions ([1, 2, 3]), frozen collections, and lightweight Minimal APIs. Outdated LLMs continually generate verbose 2018-era boilerplate with nested namespaces, Startup.cs classes, and unindexed EF Core queries.

Hallucination Symptoms
  • Invokes deprecated or removed APIs from older model training weights
  • Generates conflicting configuration files and invalid imports
  • Silently drops type-safety, boundaries, or transaction isolation
With This Rule (Guaranteed Invariants)Deterministic
Use modern C# 12 features: primary constructors, collection expressions, file-scoped namespaces, 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.
03 / VERIFIED CODE PATTERNS

Code Standards: Anti-Pattern vs Verified Implementation

Discouraged Anti-Pattern
// 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);
        }
    }
}
Verified Production Standard
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;
    }
}
04 / REPOSITORY PLACEMENT & 3-STEP TERMINAL INSTALLATION

How to Install .NET 8 & C# 12 Minimal APIs AGENTS.md Multi-Agent Rules via Terminal

1

Step 1: Open Project Directory & Verify Target Placement

Open your terminal and navigate to your project root folder where the AGENTS.md file will reside. Ensure the file is placed at the exact path below relative to your project root so the AI engine automatically loads it:

AGENTS.md
2

Step 2: Fetch Rule File via Terminal Command

Run curl, PowerShell, or wget to stream the rule directly from the DevScratchpad raw API endpoint and write it to AGENTS.md:

Terminal One-Liner Install

Run directly in your project root to stream and write this rule file with one command.

Raw API Stream
$curl -fsSL "https://www.devscratchpad.tech/api/raw/agents-md/csharp-dotnet-8" -o "AGENTS.md"
3

Step 3: Verify and Activate with AI Agent

Launch your AI coding assistant (Antigravity, Codex & Windsurf). The assistant will automatically discover AGENTS.md in your repository and apply the architectural guardrails, type constraints, and verification protocols during code generation.

05 / ROUTE DIRECTORY & CROSS-TOOLING
Format Pillar HubComprehensive Manual

AGENTS.md Multi-Agent System Protocol Directory

Inspect the complete specification manual, glob patterns, directory rules, and all available presets in our central directory.

/agents-md Directory
06 / FREQUENTLY ASKED QUESTIONS

Technical FAQ: .NET 8 & C# 12 Minimal APIs AI Rulebooks

Does this rulebook support both Minimal APIs and traditional Controllers?

Yes, though it prioritizes modern .NET 8 Minimal APIs with typed results for reduced overhead and cleaner unit testing.

Why is AsNoTracking required for EF Core reads?

AsNoTracking prevents EF Core from allocating memory for entity snapshot tracking on queries that do not modify state.