thecodeman-ai-toolkit

A collection of AI helpers for developers who build and maintain applications with .NET and C#.

In plain words
What is it for?
Optimizing EF Core database queries, scaffolding APIs and architecture, writing xUnit and Testcontainers tests, reviewing code, auditing security, and adding authentication, telemetry, or legacy .NET support.
Why use it?
It brings common .NET work—such as database, testing, security, and deployment tasks—into one toolkit for an existing codebase.

Plugin for Claude Code

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Claude Code
/plugin marketplace add StefanTheCode/dotnet-ai-toolkit
agentmods
npx agentmods add plugins/stefanthecode/dotnet-ai-toolkit/marketplace
Clone the repo
git clone --depth 1 https://github.com/StefanTheCode/dotnet-ai-toolkit

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

thecodeman-ai-toolkit scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude-plugin/marketplace.json · 51 lines

What it actually says

{
  "name": "thecodeman-ai-toolkit",
  "owner": {
    "name": "Stefan Đokić (TheCodeMan)"
  },
  "description": "AI skills and agents for mid/senior .NET developers — EF Core, performance, architecture, testing, security, observability, and DevOps. By TheCodeMan.net.",
  "plugins": [
    {
      "name": "dotnet-ai-toolkit",
      "source": "./",
      "displayName": "TheCodeMan .NET AI ToolKit",
      "description": "49+ Claude skills and 7 specialist agents that run on your real .NET code: EF Core query optimization, Minimal API & architecture scaffolding, xUnit/Testcontainers tests, JWT auth, OpenTelemetry, code review, security audits, plus a legacy pack for .NET Framework (packages.config→CPM, classic ADO.NET, WinForms). Built for modern .NET 10 / C# 14 and the legacy code that still pays the bills.",
      "version": "1.3.0",
      "author": {
        "name": "Stefan Đokić (TheCodeMan)"
      },
      "homepage": "https://thecodeman.net",
      "repository": "https://github.com/StefanTheCode/dotnet-ai-toolkit",
      "license": "MIT",
      "category": "dotnet",
      "keywords": [
        "dotnet",
        "csharp",
        "aspnetcore",
        "ef-core",
        "architecture",
        "testing",
        "security",
        "performance",
        "observability",
        "legacy",
        "winforms",
        "dotnet-framework"
      ],
      "strict": false,
      "skills": [
        "./skills/"
      ],
      "agents": [
        "./agents/aspnetcore-security-auditor.md",
        "./agents/db-performance-auditor.md",
        "./agents/dotnet-architecture-reviewer.md",
        "./agents/dotnet-code-reviewer.md",
        "./agents/dotnet-upgrade-agent.md",
        "./agents/legacy-modernization-assistant.md",
        "./agents/observability-gap-finder.md"
      ]
    }
  ]
}
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 51 lines scan A 5a52454352b4

Subscribe to this mod's changes

thecodeman-ai-toolkit is a plugin published in the GitHub repository StefanTheCode/dotnet-ai-toolkit (19 stars, last pushed 23d ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.