[FEATURE] .NET 9 or 10 SDK support in Claude Code for web runtime environment

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

Description:

The Claude Code for web runtime environment currently doesn't have the .NET 9 SDK installed, making it impossible to build .NET 9 projects.

Current behavior:

Running dotnet --version in Claude Code for web returns "command not found"
.NET 9 projects cannot be built in the Claude Code for web environment
Expected behavior:

.NET 9 SDK should be available in the runtime environment
Users should be able to build and work with .NET 9 projects directly in Claude Code for web
Context:

.NET 9 was released in November 2024 (over a year ago)
.NET 8 was previously available in the Claude Code for web environment
Many projects have already migrated to .NET 9
Request: Could you please:

Install .NET 9 SDK in the Claude Code for web runtime environment
Provide documentation about which SDK versions are available in the web environment
Share a roadmap for future SDK version updates
Workaround: Currently, users need to either downgrade their projects to .NET 8 or build locally/in CI/CD pipelines.

Thank you!

Proposed Solution

install .Net latest on agents for web claude

Alternative Solutions

_No response_

Priority

Critical - Blocking my work

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_