dotPilot: Skill for Codex

.codex/skills/mcaf-dotnet-netarchtest/SKILL.md

mcaf-dotnet-netarchtest is a skill for Codex from managedcode/dotPilot. It costs 48 tokens per session (831 once invoked), scanned A, a copy of netarchtest, MIT.

A setup for NetArchTest.Rules, a free .NET testing library for expressing rules about namespaces, dependencies, layers, and type shapes.

In plain words
What is it for?
Use it to test forbidden dependencies, namespace layers, and type conventions across selected .NET assemblies.
Why use it?
It turns architectural boundaries into automated tests, so unwanted dependencies and layering drift can fail during normal test runs.

Skill for Codex

Written for Codex: installed under .codex/. Also seen: mentions AGENTS.md.

This is managedcode/dotPilot's own configuration. It tells Codex how to work on dotPilot itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything dotPilot configures →

Reuse

Borrowing it

Nothing to install: this file belongs to managedcode/dotPilot. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/managedcode/dotPilot/main/.codex/skills/mcaf-dotnet-netarchtest/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/managedcode/dotPilot

Made for: Codex.

Wrote this? Show the measurements

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README.md
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Your own site · 80×15
<a href="https://agentmods.dev/skills/managedcode/dotpilot/mcaf-dotnet-netarchtest"><img src="https://agentmods.dev/badge/skills/managedcode/dotpilot/mcaf-dotnet-netarchtest.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 48 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 831 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 80% copy Near-identical to another mod in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00048 $0.00831
Opus 5.5 $0.00019 $0.00332
Sonnet 5.5 $0.00010 $0.00166
Haiku 4.5 $0.00005 $0.00083

Measured 1mo ago against content hash 596fdfc19b01, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mcaf-dotnet-netarchtest 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.

Origin

This is a copy

80% identical to netarchtest — 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.

.codex/skills/mcaf-dotnet-netarchtest/SKILL.md · 104 lines

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.

MCAF: .NET NetArchTest

Trigger On

  • the repo uses or wants NetArchTest.Rules
  • architecture rules should be enforced in automated tests

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

  • very rich architecture modeling that needs a heavier DSL

Inputs

  • the nearest AGENTS.md
  • architecture boundaries to enforce
  • target assemblies

Quick Start

  1. Read the nearest AGENTS.md and confirm scope and constraints.
  2. Run this skill's Workflow through the Ralph Loop until outcomes are acceptable.
  3. Return the Required Result Format with concrete artifacts and verification evidence.

Workflow

  1. Encode only durable architecture rules:
    • forbidden dependencies
    • namespace layering
    • type shape conventions
  2. Keep rules readable and close to the boundary they protect.
  3. Fail tests on architecture drift, not on temporary style noise.

Bootstrap When Missing

If NetArchTest.Rules is not configured yet:

  1. Detect existing setup:
    • rg -n "NetArchTest\\.Rules" -g '*.csproj' .
  2. Add the package to the architecture test project:
    • dotnet add TEST_PROJECT.csproj package NetArchTest.Rules
  3. Add at least one executable boundary rule test.
  4. Wire architecture tests into the standard test command in AGENTS.md and CI.
  5. Run dotnet test TEST_PROJECT.csproj and return status: configured or status: improved.
  6. If richer modeling is required and ArchUnitNET is chosen as the standard, return status: not_applicable.

Deliver

  • architecture tests that are understandable and stable
  • boundary checks wired into the normal test path used by agents and CI

Validate

  • the rules map to real boundaries the team cares about
  • failures point to actionable dependency drift

Ralph Loop

Use the Ralph Loop for every task, including docs, architecture, testing, and tooling work.

Read the full file on GitHub · 104 lines

Files

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.

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. 1mo ago First seen · 104 lines · 48 tokens per session scan A 596fdfc19b01

Subscribe to this mod's changes

mcaf-dotnet-netarchtest is a skill published in the GitHub repository managedcode/dotPilot (25 stars, last pushed 6mo ago), licensed MIT. It adds 48 tokens to every session and 831 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 80% identical to netarchtest, differing in 10 lines, and is treated as a copy.

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