Features

Syntax Highlighting — Full TextMate grammar for .gs files
IntelliSense — Completions, hover info, signature help
Navigation — Go to definition, find references, document symbols, workspace symbols
Refactoring — Rename, code actions (quick fixes)
Diagnostics — Real-time errors and warnings as you type
Formatting — Document formatting, range formatting, and on-type formatting
Semantic Highlighting — Rich semantic token types for precise colorization
Inlay Hints — Parameter names and inferred types
CodeLens — Reference counts above functions and types
Debugging — Launch and debug GSharp applications (via CoreCLR debugger)
Test Explorer — Discover, run, and debug tests
Build Integration — Build, run, and clean commands with error reporting
Snippets — Common code patterns (functions, classes, loops, etc.)
Themes — Six color themes inspired by the G# logo's amber-to-red palette: Ember, Magma, and Synthwave, each in Dark and Light variants

Requirements

.NET 10 Runtime or newer (the language server targets net10.0). When a compatible runtime is not already on the machine, the extension automatically downloads one via the .NET Install Tool (installed as a dependency). If automatic acquisition is not possible (for example, the machine is offline with nothing cached), the extension shows a single actionable prompt instead of failing silently.
C# extension (for debugging support)

Setting	Default	Description
`gsharp.server.path`	`""`	Path to the GSharp Language Server executable
`gsharp.server.waitForDebugger`	`false`	Wait for a debugger to attach to the language server
`gsharp.trace.server`	`"off"`	Trace LSP communication (`off`, `messages`, `verbose`)
`gsharp.formatting.indentSize`	`4`	Spaces per indentation level
`gsharp.formatting.useTabs`	`false`	Use tabs instead of spaces
`gsharp.diagnostics.enableOnType`	`true`	Run diagnostics on every keystroke
`gsharp.completion.triggerOnDot`	`true`	Trigger completion after typing `.`
`gsharp.codeLens.enableReferences`	`true`	Show reference counts
`gsharp.inlayHints.enableParameterNames`	`true`	Show parameter name hints
`gsharp.inlayHints.enableTypeHints`	`true`	Show inferred type hints
`gsharp.coldStartCache.enable`	`true`	Persist language-service project metadata

Language feature settings take effect after running GSharp: Restart Language Server.

Command	Description
`GSharp: Restart Language Server`	Restart the language server
`GSharp: Show Output Channel`	Show the GSharp output channel
`GSharp: Build Project`	Build the GSharp project
`GSharp: Run Project`	Run the GSharp project
`GSharp: Generate Build & Debug Assets`	Generate `.vscode/tasks.json` and `launch.json`
`GSharp: Run Tests at Cursor`	Run tests at the current cursor position
`GSharp: Debug Tests at Cursor`	Debug tests at the current cursor position
`GSharp: Report Issue`	Open GitHub Issues for bug reports

cd src/vscode-gsharp
npm install
npm run compile
# Press F5 in VS Code to launch the Extension Host

MIT