dotnet-slopwatch

1# Slopwatch: LLM Anti-Cheat for .NET
2 
3## When to Use This Skill
4 
5**Use this skill constantly.** Every time an LLM (including Claude) makes changes to:
6- C# source files (.cs)
7- Project files (.csproj)
8- Props files (Directory.Build.props, Directory.Packages.props)
9- Test files
10 
11Run slopwatch to validate the changes don't introduce "slop."
12 
13## What is Slop?
14 
15"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.
16 
17### Common Slop Patterns
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19| Pattern | Example | Why It's Bad |
20|---------|---------|--------------|
21| Disabled tests | `[Fact(Skip="flaky")]` | Hides failures instead of fixing them |
22| Warning suppression | `#pragma warning disable CS8618` | Silences compiler without fixing issue |
23| Empty catch blocks | `catch (Exception) { }` | Swallows errors, hides bugs |
24| Arbitrary delays | `await Task.Delay(1000);` | Masks race conditions, makes tests slow |
25| Project-level suppression | `<NoWarn>CS1591</NoWarn>` | Disables warnings project-wide |
26| CPM bypass | `Version="1.0.0"` inline | Undermines central package management |
27 
28**Never accept these patterns.** If an LLM introduces slop, reject the change and require a proper fix.
29 
30---
31 
32## Installation
33 
34### As a Local Tool (Recommended)
35 
36Add to `.config/dotnet-tools.json`:
37 
38```json
39{
40  "version": 1,
41  "isRoot": true,
42  "tools": {
43    "slopwatch.cmd": {
44…