What is mcaf-dotnet-complexity?

A .NET code-review aid that measures method complexity, maintainability, and how heavily classes depend on other code. .NET is Microsoft's platform for building applications, and cyclomatic complexity estimates how many decision paths a method has.

Use it to configure CA1502, CA1505, and CA1506 analyzer rules, set complexity or coupling thresholds, and guide refactoring work in .NET repositories.

It helps teams find code that is difficult to understand or change before that code becomes a maintenance problem. It can also turn agreed complexity limits into checks during continuous integration, the automated build process.

How managedcode/dotPilot configures Codex

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-complexity/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/managedcode/dotPilot

Made for: Codex.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/managedcode/dotpilot/mcaf-dotnet-complexity/github.svg)](https://agentmods.dev/skills/managedcode/dotpilot/mcaf-dotnet-complexity)

Your own site

<a href="https://agentmods.dev/skills/managedcode/dotpilot/mcaf-dotnet-complexity"><img src="https://agentmods.dev/badge/skills/managedcode/dotpilot/mcaf-dotnet-complexity/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/managedcode/dotpilot/mcaf-dotnet-complexity"><img src="https://agentmods.dev/badge/skills/managedcode/dotpilot/mcaf-dotnet-complexity.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 52 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,011 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 91% 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.

Model	Per session	Once invoked
Fable 5.1	$0.00052	$0.01011
Opus 5.5	$0.00021	$0.00404
Sonnet 5.5	$0.00010	$0.00202
Haiku 4.5	$0.00005	$0.00101

Measured 1mo ago against content hash 01f48e5201f4, 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-complexity 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

91% identical to complexity — 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-complexity/SKILL.md · 112 lines

How it starts

The opening of the file, as written. The whole thing — 112 lines — stays where its author put it; the contents beside it link to each section on GitHub.

MCAF: .NET Complexity

Trigger On

the team wants to find overly complex methods
cyclomatic complexity thresholds are needed in CI
maintainability metrics or coupling thresholds need to be configured

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

formatting-only work
generic analyzer setup with no complexity policy change

Inputs

the nearest AGENTS.md
current analyzer settings
current maintainability limits

Quick Start

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

Workflow

Start with the built-in maintainability analyzers before reaching for non-standard tooling.
Use these rules deliberately:
- CA1502 for excessive cyclomatic complexity in methods
- CA1505 for low maintainability index
- CA1506 for excessive class coupling
- CA1501 when inheritance depth is also part of the design problem
Keep rule severity in the root .editorconfig.
Keep metric thresholds in a checked-in CodeMetricsConfig.txt added as AdditionalFiles.
Pair analyzer findings with MCAF maintainability limits in AGENTS.md.

Bootstrap When Missing

If complexity thresholds are not configured yet:

Detect current state:
- rg -n "CA1501|CA1502|CA1505|CA1506|CodeMetricsConfig" -g '.editorconfig' -g '*.csproj' -g 'Directory.Build.*' .
- rg --files -g 'CodeMetricsConfig.txt'
Add severity entries for CA1502, CA1505, CA1506, and CA1501 in root .editorconfig.
Add checked-in CodeMetricsConfig.txt and include it as AdditionalFiles in project props.
Keep maintainability limits aligned with AGENTS.md.
Run dotnet build SOLUTION_OR_PROJECT and return status: configured or status: improved.
If policy relies only on AGENTS.md limits with no analyzer gate by design, return status: not_applicable.

Read the full file on GitHub · 112 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.

references/complexity.md 2.3 KB

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.

1mo ago First seen · 112 lines · 52 tokens per session scan A 01f48e5201f4

Subscribe to this mod's changes

mcaf-dotnet-complexity is a skill published in the GitHub repository managedcode/dotPilot (25 stars, last pushed 6mo ago), licensed MIT. It adds 52 tokens to every session and 1,011 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 91% identical to complexity, differing in 10 lines, and is treated as a copy.

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