Library\PackageCache\com.coplaydev.unity-mcp@0c7945b36a\Editor\Tools\ManageScript.cs(16,30): error CS0234: The type or namespace name 'Formatting' does not exist in the namespace 'Microsoft.CodeAnalysis' (are you missing an assembly reference?)

[MisfitCode]

Upon Installing and setting up Roslyn, as per Read Me, user gets the following Error:

Library\PackageCache\com.coplaydev.unity-mcp@0c7945b\Editor\Tools\ManageScript.cs(16,30): error CS0234: The type or namespace name 'Formatting' does not exist in the namespace 'Microsoft.CodeAnalysis' (are you missing an assembly reference?)

Unity 2022.X LTS (newest)
Windows 11 (fully updated)
Clean Unity Build.

[MisfitCode]

After doing some research, and talking to AI, Claude AI suggested it could be that newer versions (4x) of Roslyn could be having unknown Interactions with Unity. I installed Microsoft.CodeAnalysis.CSharp 3.11.0 and the error went away and Unity MCP now loads properly. I did not test every 4x version, I just skipped to the newest 3X version.

[arvz]

I installed Microsoft.CodeAnalysis.CSharp 3.11.0, put in the USE_ROSLYN scripting define symbol, restarted unity, but after adding the UnityMcpBridge package I'm still getting this namespace name 'Formatting' does not exist in the namespace 'Microsoft.CodeAnalysis' issue

[tdcox]

I see the same issue using 3.11.0 and 4.x in Unity 6.2