Claude Code Extension for Visual Studio: What Works

Claude Code's IDE extension is built for Visual Studio Code, not for Visual Studio. These are different products: Visual Studio Code is a lightweight cross-platform editor; Visual Studio is Microsoft's full IDE for Windows and .NET development. If you work in Visual Studio, your options for using Claude are different from what a VS Code user has. Tools like fenbs keep the same project brief and decisions accessible through any client you choose.

This guide explains the difference between the two editors, what Claude integration options exist for Visual Studio, and how to keep project context consistent regardless of which IDE you use.

Visual Studio Code vs Visual Studio: the key difference

Visual Studio Code (VS Code) is an open-source, cross-platform code editor maintained by Microsoft. It runs on Windows, macOS and Linux and supports most languages through extensions.

Visual Studio is Microsoft's full-featured IDE, primarily for Windows. It targets .NET, C++ and enterprise development with deep integration for MSBuild, NuGet and Azure DevOps. The two products share "Visual Studio" in the name but have different extension ecosystems.

If you searched for a Claude Code extension for Visual Studio and found instructions for VS Code, that is the reason for the confusion. The extensions are not interchangeable.

What Claude integration exists for Visual Studio

As of October 2026, Anthropic has not published a native Claude extension for Visual Studio (the full IDE). The options available to Visual Studio users are:

• Claude Code in a terminal alongside Visual Studio. Run claude in any terminal — the Windows Terminal, PowerShell, or the Developer Command Prompt — and work with your codebase from the command line while Visual Studio stays open for the build, debugger and GUI.
• Claude via a third-party Visual Studio extension. Check the Visual Studio Marketplace for current offerings; verify that the extension connects to Anthropic's API rather than a third-party proxy, and review its permissions.
• Claude.ai in a browser tab, with code pasted back and forth. This is manual but requires no installation.

For current availability of a first-party Visual Studio extension, check Anthropic's integrations page↗ (opens in a new tab) and the Visual Studio Marketplace directly. Product availability changes; a roundup may be outdated.

Using Claude Code from the terminal with Visual Studio

The most reliable approach for Visual Studio users is to run Claude Code in a terminal window pointed at the same solution directory. Claude Code can read .cs, .csproj and .sln files, understand the project structure, and edit files that Visual Studio will then reflect when it reloads.

Open the Developer Command Prompt for Visual Studio (it sets up the right environment variables) and run claude in the solution root. Ask Claude Code to read the solution structure before making any changes. For large .NET solutions, point it at the specific project rather than the entire solution.

Visual Studio detects external file changes and prompts you to reload. Accept the reload after Claude Code finishes an edit. Check the change in the Visual Studio diff view before building.

For full installation instructions for Claude Code, see how to install Claude Code.

Keeping project context available across clients

A team that mixes Visual Studio and VS Code users — or switches between them on different tasks — has a shared context problem. The project brief, the agreed conventions, and the current task state need to reach every developer and every connected AI assistant, regardless of which IDE they use.

An AGENTS.md file in the solution root helps: Claude Code reads it in every session. But AGENTS.md is for standing instructions, not for current task state. Where we left off, what was decided last sprint, and the next step belong in a record that updates as the work evolves.

Decisions that all IDE users should share

Coding standards, namespace conventions, error-handling patterns and architectural rules are decisions that should reach every AI assistant on the team, not just the ones working in VS Code. If one developer records a decision about how services are layered, a colleague's AI session in a different editor should follow the same rule.

Recording these decisions in fenbs rather than in a VS Code settings file or in a developer's personal CLAUDE.md makes them available wherever the work is done.

Add architectural rules and coding standards as Decisions and rules in fenbs. They appear first in every connected assistant's context — whether the assistant runs in a terminal next to Visual Studio, in VS Code, or on another machine. Every session starts from the same agreed base.

How to do this with fenbs

1. Create a free account and add the project.
2. Record the coding standards and architectural decisions as Decisions and rules in fenbs.
3. Install Claude Code and run it in a terminal in the solution directory. See how to install Claude Code.
4. Connect Claude Code from Integrations. Ask it to read the project context at the start of each session.
5. Work in Visual Studio for the build, debugger and GUI. Use Claude Code in the terminal for AI-assisted edits. Reload files in Visual Studio after each Claude Code change.

For an overview of Claude Code, see what Claude Code is and how to install Claude Code.