dotPilot: Skill for Codex

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

mcaf-dotnet-csharpier is a skill for Codex from managedcode/dotPilot. It costs 53 tokens per session (899 once invoked), scanned A, a copy of csharpier, MIT.

A setup for CSharpier, a free formatter for C# and XML that applies one consistent style with few configuration choices.

In plain words
What is it for?
Use it to choose CSharpier as the main formatter, configure ignored files, run its check mode, and document how it relates to dotnet format.
Why use it?
It keeps formatting decisions consistent and provides a check that can run in CI, without mixing ownership with another formatter.

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

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Your own site · 80×15
<a href="https://agentmods.dev/skills/managedcode/dotpilot/mcaf-dotnet-csharpier"><img src="https://agentmods.dev/badge/skills/managedcode/dotpilot/mcaf-dotnet-csharpier.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 53 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 899 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 94% 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 $0.00053 $0.00899
Opus 5.5 $0.00021 $0.00360
Sonnet 5.5 $0.00011 $0.00180
Haiku 4.5 $0.00005 $0.00090

Measured 1mo ago against content hash 9961df63e369, 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-csharpier 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

94% identical to csharpier — 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-csharpier/SKILL.md · 105 lines

How it starts

The opening of the file, as written. The whole thing — 105 lines — stays where its author put it; the contents beside it link to each section on GitHub.

MCAF: .NET CSharpier

Trigger On

  • the repo uses or wants CSharpier
  • the team prefers an opinionated formatter over many configurable style knobs

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 standardized on dotnet format as the only formatter

Inputs

  • the nearest AGENTS.md
  • current formatting ownership model
  • any .csharpierignore or .editorconfig

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. Decide whether CSharpier is the primary formatter or only complements other tools.
  2. Use check mode in CI.
  3. Keep ignore files and config explicit in repo.
  4. Do not let CSharpier and dotnet format both own the same formatting space without documentation.

Bootstrap When Missing

If CSharpier is not configured yet:

  1. Detect current state:
    • rg --files -g '.config/dotnet-tools.json' -g '.csharpierignore'
    • dotnet tool list --local
    • dotnet tool list --global
  2. Prefer local tool installation for reproducible CI:
    • dotnet new tool-manifest (if missing)
    • dotnet tool install csharpier
  3. Add .csharpierignore when needed and define ownership vs dotnet format in AGENTS.md.
  4. Add dotnet csharpier check . to CI.
  5. Run dotnet csharpier check . and return status: configured or status: improved.
  6. If the repo intentionally uses only dotnet format, return status: not_applicable unless migration is requested.

Deliver

  • explicit CSharpier ownership and commands
  • CI-safe formatter checks

Validate

  • formatter ownership is not ambiguous
  • the repo is comfortable with opinionated formatting decisions

Read the full file on GitHub · 105 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 · 105 lines · 53 tokens per session scan A 9961df63e369

Subscribe to this mod's changes

mcaf-dotnet-csharpier is a skill published in the GitHub repository managedcode/dotPilot (25 stars, last pushed 6mo ago), licensed MIT. It adds 53 tokens to every session and 899 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 94% identical to csharpier, differing in 10 lines, and is treated as a copy.

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