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Feat/csharp playground#10189

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JoshLove-msft wants to merge 6 commits intomicrosoft:mainfrom
JoshLove-msft:feat/csharp-playground
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Feat/csharp playground#10189
JoshLove-msft wants to merge 6 commits intomicrosoft:mainfrom
JoshLove-msft:feat/csharp-playground

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JoshLove-msft and others added 2 commits March 27, 2026 16:51
…ble emitter and .NET server

Make the C# emitter loadable in browser environments by converting static
Node.js imports (child_process, fs, path, url) to dynamic imports. Add a
'playground-server-url' emitter option that, when set, POSTs the code model
to a remote .NET server instead of spawning a local dotnet process.

Create an ASP.NET Core playground server that accepts code model JSON and
configuration, runs the .NET generator, and returns the generated C# files.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Add @typespec/http-client-csharp and @azure-tools/typespec-client-generator-core
to the playground-website config and dependencies. The C# emitter now appears
in the emitter dropdown and its output files are shown in the file explorer.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@microsoft-github-policy-service microsoft-github-policy-service bot added the emitter:client:csharp Issue for the C# client emitter: @typespec/http-client-csharp label Mar 28, 2026
JoshLove-msft and others added 4 commits March 27, 2026 17:35
Set playground-server-url as a default emitter option for the C# emitter
in the playground. The URL defaults to localhost:5174 for local dev and
can be overridden via VITE_PLAYGROUND_SERVER_URL env var at build time.

Add dev:playground script to http-client-csharp package.json that runs
both the Vite playground and .NET server concurrently.

Fix generator DLL path resolution in playground server.

Verified end-to-end: server generates 18 C# files from a real TypeSpec
code model (authentication/api-key test fixture).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Fix the .NET server to actually bind to port 5174 (was using ASP.NET
default port 5000). Add @azure-tools/typespec-azure-core as a dependency
since TCGC has a peer dependency on it.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
In playground mode, serialize the code model and configuration in memory
and send directly to the server instead of writing to the virtual FS and
reading back. Extract serializeCodeModel() from writeCodeModel() to
enable this.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
…s, and highlight changed files

- Add isCompiling state with Spinner overlay in output panel during compilation
- Preserve previous output files when compilation has transient errors (mid-typing)
- Fix race condition: discard stale compilation results, catch emitter crashes
- Highlight changed files in file tree with bold green text (opt-in per emitter)
- Add nodeLabel prop to Tree component for custom label rendering
- Browser detection fallback for playground-server-url
- Enable change highlighting for C# emitter only via emittersWithChangeHighlighting
- Add CSS for Monaco changed-line decorations (playground-changed-line)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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emitter:client:csharp Issue for the C# client emitter: @typespec/http-client-csharp ui:playground

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