csharp

csharp is a skill for Claude Code, Codex from jnotsknab/mux-swarm. It costs 49 tokens per session (979 once invoked), scanned A, original, GPL-3.0.

Guidance for writing, reviewing, and refactoring C# code for .NET 8 and newer. It covers naming, common coding patterns, command-line use, dependencies, xUnit tests, and XML documentation.

In plain words
What is it for?
Use it when building, reviewing, or reorganising C# applications and libraries, including their tests and documentation.
Why use it?
It gives C# work consistent conventions and explains the standard tools and practices used in modern .NET projects.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit Use it when building, reviewing, or reorganising C# applications and libraries, including their tests and documentation.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/jnotsknab/mux-swarm/csharp
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add jnotsknab/mux-swarm --skill csharp
Clone the repo
git clone --depth 1 https://github.com/jnotsknab/mux-swarm

Made for: Claude Code, 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.

agentmods badge for csharp

README.md
[![agentmods](https://agentmods.dev/badge/skills/jnotsknab/mux-swarm/csharp/github.svg)](https://agentmods.dev/skills/jnotsknab/mux-swarm/csharp)
Your own site
<a href="https://agentmods.dev/skills/jnotsknab/mux-swarm/csharp"><img src="https://agentmods.dev/badge/skills/jnotsknab/mux-swarm/csharp/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.

agentmods 80×15 button for csharp

Your own site · 80×15
<a href="https://agentmods.dev/skills/jnotsknab/mux-swarm/csharp"><img src="https://agentmods.dev/badge/skills/jnotsknab/mux-swarm/csharp.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 49 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 979 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 unknown No closer match found 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 $0.00049 $0.00979
Opus 5.5 $0.00020 $0.00392
Sonnet 5.5 $0.00010 $0.00196
Haiku 4.5 $0.00005 $0.00098

Measured 1mo ago against content hash aaf9e9a5d5b1, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

csharp 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.

Skills/bundled/csharp/SKILL.md · 122 lines

The source is not reproduced here

Licensed GPL-3.0

The repository is licensed GPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

Files

What ships with it

2 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.

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 · 122 lines · 49 tokens per session scan A aaf9e9a5d5b1

Subscribe to this mod's changes

csharp is a skill published in the GitHub repository jnotsknab/mux-swarm (9 stars, last pushed yesterday), licensed GPL-3.0. It adds 49 tokens to every session and 979 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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