A read-only C# code analysis tool that provides compiler diagnostics, navigation, references, and type information through OmniSharp and Roslyn, Microsoft's C# compiler platform.

Use it to find compile errors, nullable warnings, unused imports, definitions, references, inferred types, and documentation in C# projects.

It helps inspect C# and .NET code without changing files, while showing problems and relationships that are difficult to identify with text search alone.

csharp-lsp — Plugin for Claude Code by MSApps-Mobile/claude-plugins

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.

Clone the repo

git clone --depth 1 https://github.com/MSApps-Mobile/claude-plugins

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/plugins/msapps-mobile/claude-plugins/csharp-lsp/github.svg)](https://agentmods.dev/plugins/msapps-mobile/claude-plugins/csharp-lsp)

Your own site

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

Per session not measured What this adds to a session before it is invoked.

When invoked not measured The manifest loads nothing itself; its 1 skill cost 181 tokens a session between them.

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.

Security

Grade A, and why

csharp-lsp 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 today.

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.

plugins/csharp-lsp/.claude-plugin/plugin.json · 46 lines

What it actually says

{
  "name": "csharp-lsp",
  "version": "1.0.1",
  "description": "Real-time C# code intelligence for Claude — Roslyn diagnostics, go-to-definition, find references, and type info via OmniSharp.",
  "author": {
    "name": "MSApps",
    "email": "[email protected]",
    "url": "https://msapps.mobi"
  },
  "homepage": "https://msapps.mobi/plugins",
  "repository": "https://github.com/MSApps-Mobile/claude-plugins",
  "license": "MIT",
  "privacy_policy": "https://opsagents.agency/privacy",
  "terms_of_service": "https://opsagents.agency/terms",
  "keywords": [
    "csharp",
    "dotnet",
    "omnisharp",
    "roslyn",
    "unity",
    "xamarin",
    "maui",
    "lsp",
    "code-intelligence",
    "diagnostics",
    "sosa-agents"
  ],
  "lspServers": "./.lsp.json",
  "sosa": {
    "compliant": true,
    "level": 1,
    "impact": "low",
    "methodology": "https://github.com/MSApps-Mobile/claude-plugins/blob/main/docs/SOSA.md",
    "whitepaper": "https://github.com/MSApps-Mobile/claude-plugins/blob/main/docs/sosa-whitepaper.pdf",
    "pillars": {
      "supervised": "Fully autonomous — read-only code analysis, no external calls or side effects",
      "orchestrated": "LSP protocol handles Roslyn diagnostics, navigation, and hover automatically on file changes",
      "secured": "Not sandboxed: OmniSharp evaluates the opened project's MSBuild files (which can run code). Analyzer loading and package auto-restore are OFF by default; use on trusted projects only",
      "agents": "R=csharp-code-intelligence, T=omnisharp, M=none, P=analyze-on-edit"
    }
  },
  "topics": [
    "sosa-agents"
  ]
}

Contents

What it installs

The manifest is a name and a version. 1 skill travel with it, and installing the plugin installs all of them — 181 tokens a session between them. Each is measured on its own page, and each can be installed alone.

Skill csharp-lsp A 181 tokens

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.

today First seen · 46 lines scan A b7f13b35d9e9

Subscribe to this mod's changes

csharp-lsp is a plugin published in the GitHub repository MSApps-Mobile/claude-plugins (10 stars, last pushed today), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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 2026-10-18.

C# and .NET Debugging Languages agent-safety ai-agents ai-governance claude claude-plugins

csharp-lsp

Getting it into your agent

Wrote this? Show the measurements

Grade A, and why

Nothing flagged

What it actually says

What it installs

What this file has done since we first saw it

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