Add csharp-ls language server#6205
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csharp-ls is a lightweight F#-based language server for C#, distributed as a
dotnet toolNuGet package. It is unrelated to the deprecatedSofusA/csharp-language-serverwrapper referenced by zed-extensions/csharp#11 and zed-extensions/csharp#57 ; the upstream project markets itself as csharp-ls precisely to reduce that confusion.Existing
csharpextensionThe existing
csharpextension provides OmniSharp and Roslyn, but it does not provide csharp-ls. csharp-ls is a different language server that provides a much faster cold start and feels faster generally.The publishing guidelines say: "only create a new one if upstream is unresponsive." zed-extensions/csharp#77 (opened 2026-05-04) added csharp-ls as a third option in the existing extension and has had no maintainer engagement for 3 weeks. Submitting here as a standalone extension lets users opt into csharp-ls without further blocking on that upstream review.
Install model
The extension is detect-only, it does not bundle or auto-download the server. If
csharp-lsis not found onPATH, the extension surfaces a hint pointing at:dotnet tool install --global csharp-lsEvidence
I have been using it locally for a few weeks without any issues, and it is much snappier.
