sailro

sailro / RoslynMcpExtension

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A Visual Studio extension that exposes semantic C# code analysis via the Model Context Protocol (MCP), powered by the live Roslyn workspace inside Visual Studio.

csharp mcp roslyn semantic visual-studio
17
0
100% credibility
Found Feb 18, 2026 at 14 stars -- GitGems finds repos before they trend. Get early access to the next one.
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AI Analysis
C#
AI Summary

A Visual Studio extension that connects AI assistants to live C# code analysis features like diagnostics, symbol search, find references, and go-to-definition using Visual Studio's built-in workspace.

How It Works

1
🔍 Discover the tool

You hear about a helpful Visual Studio add-on that lets AI assistants deeply understand and analyze your C# code as you work.

2
📥 Install the add-on

Download the package and add it to Visual Studio just like any other extension from the marketplace.

3
🚀 Open your project

Launch Visual Studio, open your C# solution, and the add-on gets ready automatically.

4
⚙️ Start code sharing

Flip the switch in settings to let AI peek into your live code changes and project details.

5
🤝 Connect your AI helper

Tell your AI chat app, like Claude, to connect to this tool so it can access your code.

6
💬 Ask about your code

Chat with the AI using simple prompts like 'check this file for errors' or 'find where this method is used'.

🎉 Get smart insights

Receive accurate analysis, error checks, symbol locations, and references right away, making coding faster and easier.

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AI-Generated Review

What is RoslynMcpExtension?

This C# Visual Studio extension brings live semantic code analysis from your open solution to MCP clients, like Visual GitHub Copilot in Visual Studio Code or Claude Desktop. Powered by Roslyn's real-time workspace in Visual Studio 2022 or 2026, it handles tasks such as validating files for errors and warnings, finding semantic references, going to definitions, listing document symbols, searching solution-wide symbols, and fetching symbol details. Developers get accurate insights into unsaved changes and full compilation state without rebuilding.

Why is it gaining traction?

Unlike standalone Roslyn MCP servers that recompile from saved files, this taps Visual Studio's live workspace for true semantic search—no text matching fakes—and includes unsaved edits plus VS diagnostics. It connects seamlessly to Visual Studio Code online or desktop via HTTP/SSE on port 5050, with auto-start on solution load. The edge is feeding precise C# analysis to AI tools without setup hassles.

Who should use this?

C# backend devs in Visual Studio Community 2022 who pair with Visual Studio Code for AI assistance via GitHub Copilot. Ideal for teams doing code reviews, refactoring large solutions, or prompting AIs with "find references to ProcessOrder in OrderService.cs" during active debugging. Skip if you're on github visual basic or non-VS workflows.

Verdict

Early alpha with 10 stars and 1.0% credibility—docs are solid but lacks tests and broad adoption; build the VSIX yourself from github visual studio repo. Worth a spin for Visual Studio 2022 download users bridging to Visual Studio Code analysis, but monitor for stability before production.

(198 words)

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