Borrowing it
Nothing to install: this file belongs to managedcode/MCPGateway. 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/MCPGateway/main/.codex/skills/mcaf-dotnet-meziantou-analyzer/SKILL.mdgit clone --depth 1 https://github.com/managedcode/MCPGatewayWrote 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/mcpgateway/mcaf-dotnet-meziantou-analyzer)<a href="https://agentmods.dev/skills/managedcode/mcpgateway/mcaf-dotnet-meziantou-analyzer"><img src="https://agentmods.dev/badge/skills/managedcode/mcpgateway/mcaf-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/mcpgateway/mcaf-dotnet-meziantou-analyzer"><img src="https://agentmods.dev/badge/skills/managedcode/mcpgateway/mcaf-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 | $0.00056 | $0.00882 |
| Opus 5.5 | $0.00022 | $0.00353 |
| Sonnet 5.5 | $0.00011 | $0.00176 |
| Haiku 4.5 | $0.00006 | $0.00088 |
Grade A, and why
mcaf-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
89% 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 — 102 lines — stays where its author put it; the contents beside it link to each section on GitHub.
MCAF: .NET 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
1 file 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 · 102 lines · 56 tokens per session scan A e62e306eb9bc
mcaf-dotnet-meziantou-analyzer is a skill published in the GitHub repository managedcode/MCPGateway (5 stars, last pushed 8d ago), licensed MIT. It adds 56 tokens to every session and 882 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 89% identical to meziantou-analyzer, differing in 10 lines, and is treated as a copy.
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