Dotnet Slopwatch

Use Slopwatch to detect LLM reward hacking in .NET code changes.

Install

npx skills add Aaronontheweb/dotnet-skills --skill dotnet-slopwatch -g -a claude-code -y

Press to copy:C Claude CodeX CodexU CursorA Ask your agent

Repository: Aaronontheweb/dotnet-skills1.2k
Category: Testing
Updated: 7d ago
License: MIT
Context cost: Mediumabout 1,977 tokens
Runs scripts: No, instructions only

What it does

Use Slopwatch to detect LLM reward hacking in .NET code changes. Run after every code modification to catch disabled tests, suppressed warnings, empty catch blocks, and other shortcuts that mask real problems.

Slopwatch: LLM Anti-Cheat for .NET

When to Use This Skill

Use this skill constantly. Every time an LLM (including Claude) makes changes to:

C# source files (.cs)
Project files (.csproj)
Props files (Directory.Build.props, Directory.Packages.props)
Test files

Run slopwatch to validate the changes don't introduce "slop."

What is Slop?

"Slop" refers to shortcuts LLMs take that make tests pass or builds succeed without actually solving the underlying problem. These are reward hacking behaviors - the LLM optimizes for apparent success rather than real fixes.

Common Slop Patterns

Pattern	Example	Why It's Bad
Disabled tests	`[Fact(Skip="flaky")]`	Hides failures instead of fixing them
Warning suppression	`#pragma warning disable CS8618`	Silences compiler without fixing issue
Empty catch blocks	`catch (Exception) { }`	Swallows errors, hides bugs
Arbitrary delays	`await Task.Delay(1000);`	Masks race conditions, makes tests slow
Project-level suppression	`<NoWarn>CS1591</NoWarn>`	Disables warnings project-wide
CPM bypass	`Version="1.0.0"` inline	Undermines central package management

Never accept these patterns. If an LLM introduces slop, reject the change and require a proper fix.

Installation

As a Local Tool (Recommended)

Add to .config/dotnet-tools.json:

{
  "version": 1,
  "isRoot": true,
  "tools": {
    "slopwatch.cmd": {
      "version": "0.4.2",
      "commands": ["slopwatch"],
      "rollForward": false
    }
  }
}

Then restore:

dotnet tool restore

As a Global Tool

dotnet tool install --global Slopwatch.Cmd

First-Time Setup: Establish a Baseline

Before using slopwatch on an existing project, create a baseline of current issues:

# Initialize baseline from existing code
slopwatch init

Read the whole SKILL.md on GitHub