What is coding-csharp?

A set of C# rules for naming code and organizing common patterns, including asynchronous code, interfaces, errors, and resource cleanup. C# is a programming language used for applications, games, and services.

Use it when writing or reviewing C# classes, methods, interfaces, files, exceptions, asynchronous operations, and disposable resources.

It makes code in the ECHO Protocol consistent and highlights practices that prevent common errors in asynchronous and resource-handling code.

How savant0x/savant-code configures Claude Code and Codex

Reuse

Borrowing it

Nothing to install: this file belongs to savant0x/savant-code. 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/savant0x/savant-code/main/.agents/skills/coding-csharp/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/savant0x/savant-code

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/savant0x/savant-code/coding-csharp/github.svg)](https://agentmods.dev/skills/savant0x/savant-code/coding-csharp)

Your own site

<a href="https://agentmods.dev/skills/savant0x/savant-code/coding-csharp"><img src="https://agentmods.dev/badge/skills/savant0x/savant-code/coding-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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/savant0x/savant-code/coding-csharp"><img src="https://agentmods.dev/badge/skills/savant0x/savant-code/coding-csharp.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 25 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 737 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. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

Origin original 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.

Model	Per session	Once invoked
Fable 5.1	$0.00025	$0.00737
Opus 5.5	$0.00010	$0.00295
Sonnet 5.5	$0.00005	$0.00147
Haiku 4.5	$0.00003	$0.00074

Measured 13d ago against content hash 2248013e5cfa, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

coding-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 13d 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.

.agents/skills/coding-csharp/SKILL.md · 87 lines

How it starts

The opening of the file, as written. The whole thing — 87 lines — stays where its author put it; the contents beside it link to each section on GitHub.

C# Coding Standards

Naming Conventions

Element	Convention	Example
Classes	PascalCase	`UserProfile`, `GameState`
Interfaces	PascalCase (I prefix)	`ISerializable`, `IRenderable`
Methods	PascalCase	`CalculateDistance`, `SpawnUnit`
Variables (public)	PascalCase	`PlayerCount`, `IsValid`
Variables (private)	camelCase	`playerCount`, `isValid`
Constants	PascalCase	`MaxPlayers`, `TileSize`
Static fields	s_ prefix (private), PascalCase (public)	`s_instance`, `Config`
Enums	PascalCase (type), PascalCase (values)	`TileType.Grassland`
Namespaces	PascalCase	`GameEngine.WorldGen`
Files	PascalCase.cs (match class name)	`UserProfile.cs`

Patterns

Error Handling

Use custom exception hierarchy extending Exception
Catch specific exceptions, never bare Exception
Use IDisposable with using statements
Prefer Result<T> pattern over exceptions for expected failures

Async/Await

Use async/await consistently, avoid .Result or .Wait()
Pass CancellationToken through async chains
Use ConfigureAwait(false) in library code
Avoid async void except for event handlers

Imports

Group: System → external → internal
Use using directives at file top
Prefer using static for utility methods

File Structure

src/
├── Program.cs               # Entry point
├── Config/
│   └── AppConfig.cs         # Configuration
├── Exceptions/
│   └── AppException.cs      # Custom exceptions
├── Models/
│   └── [Domain].cs          # Data classes
├── Services/
│   └── [Domain]Service.cs   # Business logic
tests/
└── [Mirror structure]

Anti-Patterns to Flag

catch (Exception e) without rethrow
async void methods
.Result or .Wait() on tasks
Mutable static state
God classes (one class dominating a file near the 400-line ceiling)
Magic numbers (extract to constants)
var when type is not obvious from context

Read the full file on GitHub · 87 lines

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.

13d ago Changed · +4 lines 2248013e5cfa
2mo ago First seen · 83 lines · 25 tokens per session scan A db6d8a3579e9

Subscribe to this mod's changes

coding-csharp is a skill published in the GitHub repository savant0x/savant-code (11 stars, last pushed 3d ago), licensed Apache-2.0. It adds 25 tokens to every session and 737 once invoked, about $0.0001 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 2026-08-30.

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savant-code: Skill for Claude Code