What is csharp-lsp CLAUDE.md?

Repository instructions for a Claude Code plugin that adds C# support through OmniSharp, a language server that provides code intelligence for .NET projects.

Use them when setting up the plugin, editing its language-server or hook configuration, and working with nullable C#, asynchronous code, builds, formatting, or tests.

They explain the project layout, setup, and coding conventions so changes fit the plugin and avoid slow or inconsistent hooks.

How zircote/csharp-lsp configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to zircote/csharp-lsp. 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/zircote/csharp-lsp/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/zircote/csharp-lsp

Made for: Claude Code.

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/instructions/zircote/csharp-lsp/claude-md/github.svg)](https://agentmods.dev/instructions/zircote/csharp-lsp/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/zircote/csharp-lsp/claude-md"><img src="https://agentmods.dev/badge/instructions/zircote/csharp-lsp/claude-md/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/instructions/zircote/csharp-lsp/claude-md"><img src="https://agentmods.dev/badge/instructions/zircote/csharp-lsp/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 202 This file is loaded in full into every session.

When invoked 202 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

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	$0.00202	$0.00202
Opus 5.5	$0.00081	$0.00081
Sonnet 5.5	$0.00040	$0.00040
Haiku 4.5	$0.00020	$0.00020

Measured 2mo ago against content hash d8530b07491f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

csharp-lsp CLAUDE.md 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 2mo 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.

CLAUDE.md · 33 lines

What it actually says

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Project Overview

A Claude Code plugin providing C# development support through OmniSharp LSP integration and 12 automated hooks for .NET builds, linting, formatting, and testing.

Setup

Run /setup to install all required tools, or manually:

brew install omnisharp

Key Files

File	Purpose
`.lsp.json`	OmniSharp LSP configuration
`hooks/hooks.json`	Automated development hooks
`hooks/scripts/csharp-hooks.sh`	Hook dispatcher script
`commands/setup.md`	`/setup` command definition
`.claude-plugin/plugin.json`	Plugin metadata

Conventions

Prefer minimal diffs
Keep hooks fast
Use nullable reference types
Prefer async/await throughout (avoid .Result/.Wait())

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.

2mo ago First seen · 33 lines · 202 tokens per session scan A d8530b07491f

Subscribe to this mod's changes

csharp-lsp CLAUDE.md is an instructions file published in the GitHub repository zircote/csharp-lsp (10 stars, last pushed 4d ago), licensed MIT. It adds 202 tokens to every session, about $0.0008 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.

C# and .NET Languages claude-code-plugin code-quality dotnet lsp omnisharp

csharp-lsp CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
csharp-lsp CLAUDE.mdzircote/csharp-lsp	Instructions file	10	4d ago	MIT	A	202	Claude Code
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csharp-lsp: Instructions file for Claude Code