Borrowing it
Nothing to install: this file belongs to managedcode/PrompterOne. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/managedcode/PrompterOne/main/.codex/skills/dotnet-meziantou-analyzer/SKILL.mdgit clone --depth 1 https://github.com/managedcode/PrompterOneWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/managedcode/prompterone/dotnet-meziantou-analyzer)<a href="https://agentmods.dev/skills/managedcode/prompterone/dotnet-meziantou-analyzer"><img src="https://agentmods.dev/badge/skills/managedcode/prompterone/dotnet-meziantou-analyzer/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/managedcode/prompterone/dotnet-meziantou-analyzer"><img src="https://agentmods.dev/badge/skills/managedcode/prompterone/dotnet-meziantou-analyzer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00054 | $0.00885 |
| Opus 5.5 | $0.00022 | $0.00354 |
| Sonnet 5.5 | $0.00011 | $0.00177 |
| Haiku 4.5 | $0.00005 | $0.00089 |
Grade A, and why
dotnet-meziantou-analyzer 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 1mo 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.
This is a copy
92% identical to meziantou-analyzer — 10 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 104 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Meziantou.Analyzer
Trigger On
- the repo uses or wants
Meziantou.Analyzer - the team wants one analyzer pack that covers design, usage, security, performance, and style
Value
- produce a concrete project delta: code, docs, config, tests, CI, or review artifact
- reduce ambiguity through explicit planning, verification, and final validation skills
- leave reusable project context so future tasks are faster and safer
Do Not Use For
- repos that already enforce an overlapping analyzer baseline and do not want extra diagnostics
- formatting-only work
Inputs
- the nearest
AGENTS.md - current analyzer packages
.editorconfig
Quick Start
- Read the nearest
AGENTS.mdand confirm scope and constraints. - Run this skill's
Workflowthrough theRalph Loopuntil outcomes are acceptable. - Return the
Required Result Formatwith concrete artifacts and verification evidence.
Workflow
- Add
Meziantou.Analyzerwhen the repo wants broader rules than the SDK baseline. - Keep rule severity in the repo-root
.editorconfig. - Review overlaps with SDK analyzers and Roslynator before mass-enabling everything as errors.
Bootstrap When Missing
If Meziantou.Analyzer is not configured yet:
- Detect current state:
rg -n "Meziantou\\.Analyzer" -g '*.csproj' .
- Add the package to the intended scope (project-level or shared props strategy):
dotnet add PROJECT.csproj package Meziantou.Analyzer
- Set severity in root
.editorconfigfor the enabledMAxxxxrules. - Keep overlap with SDK analyzers and Roslynator explicit to avoid duplicate noise.
- Run
dotnet build SOLUTION_OR_PROJECTand returnstatus: configuredorstatus: improved. - If the repo intentionally keeps a smaller analyzer surface, return
status: not_applicable.
Deliver
- explicit Meziantou package setup
- repo-owned severity and warning policy
Validate
- the added rules are understood by the team
- CI runs stay actionable instead of noisy
What ships with it
4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 1mo ago First seen · 104 lines · 54 tokens per session scan A 29431373fa4a
dotnet-meziantou-analyzer is a skill published in the GitHub repository managedcode/PrompterOne (45 stars, last pushed 5mo ago), licensed MIT. It adds 54 tokens to every session and 885 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 92% identical to meziantou-analyzer, differing in 10 lines, and is treated as a copy.
Other skills, from other repositories
qa-tester
Verifies programmer deliveries when a ticket reaches Review. Actually runs the application/tests/endpoints to confirm the change works, sets up missing test tooling when needed, and blocks the ticket if execution is impossible. Posts a PASS/FAIL/BLOCKED report; on FAIL, returns the ticket to Todo.
author-test
Generate a test given sample. Parameters: C# SDK repository root; Package name: one of Azure.AI.Projects, Azure.AI.Projects.Agents or Azure.AI.Extensions.OpenAI; the sample to use as a starting point for the test.
migrate-xunit-to-mstest
Convert .NET tests from xUnit.net v2/v3 to MSTest v4 while preserving VSTest or MTP. Use for replacing xunit packages, Fact/Theory/InlineData/MemberData, assertions, IClassFixture/ICollectionFixture, ITestOutputHelper, TestContext cancellation, traits/Owner, skips, timeouts, and xUnit parallelization. Also use when a…
migrate-xunit-to-xunit-v3
Migrate .NET test projects from xUnit.net v2 to xunit.v3 and fix v3 breaks. Use for package/CPM conversion, OutputType=Exe, preserving the VSTest or MTP runner (including projects currently using YTest.MTP.XUnit2), incompatible TFMs, async void tests, string-to-Type attributes, custom Fact/Theory/BeforeAfterTest…
crap-score
Calculates CRAP (Change Risk Anti-Patterns) for a named .NET method, class, or file. USE FOR: explicit CRAP calculation or coverage-and-complexity risk within that named target, including which tests to prioritize. DO NOT USE FOR: project-wide coverage/CRAP, plateaus, or project-wide blockers/priorities…
nunit
Write, run, or repair .NET tests that use NUnit. Use when a repo uses NUnit, [Test], [TestCase], [TestFixture], or NUnit3TestAdapter for VSTest or Microsoft.Testing.Platform execution. USE FOR: writing or reviewing NUnit tests; using [Test], [TestCase], [TestFixture], [SetUp], [TearDown] attributes; configuring…