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[.NET] Bundled Copilot Cli download times out #451
Description
Steps to repro
Follow the getting started guide.
- macOS 26 (Arm64)
dotnet new console -n $whatever -o $wherever- Add to .csproj:
<ItemGroup Label="Dependencies"> <PackageReference Include="GitHub.Copilot.SDK" Version="0.1.24-preview.0" /> </ItemGroup>
- Copy-paste in the example code from getting started guide (permalink)
- Run
dotnet run -v diag
Error message:
CopilotPlayground % dotnet run -v diag
Restore complete (0.2s)
Determining projects to restore...
All projects are up-to-date for restore.
CopilotPlayground net10.0 failed with 1 error(s) (100.1s)
Downloading Copilot CLI 0.0.405 for darwin-arm64...
/Users/loganbussell/.nuget/packages/github.copilot.sdk/0.1.24-preview.0/build/GitHub.Copilot.SDK.targets(47,5): error MSB3923: Failed to download file "https://registry.npmjs.org/@github/copilot-darwin-arm64/-/copilot-darwin-arm64-0.0.405.tgz". The request was canceled due to the configured HttpClient.Timeout of 100 seconds elapsing. ---> A task was canceled. ---> A task was canceled.
Build failed with 1 error(s) in 100.5s
The build failed. Fix the build errors and run again.
When I download the tarball from the link using my browser, it works no problem (instantly) https://registry.npmjs.org/@github/copilot-darwin-arm64/-/copilot-darwin-arm64-0.0.405.tgz.
Activity
github-actions commentedon Feb 11, 2026
Thanks for reporting this, @lbussell! I've labeled this as a bug with the .NET SDK.
The issue is clear: the bundled CLI download times out after 100 seconds when building on macOS arm64, even though the same file downloads instantly in a browser. This appears to be an issue with the MSBuild download task's HttpClient timeout or network configuration.
This should be investigated by the maintainers.
lbussell commentedon Feb 11, 2026
Also, version 0.1.23 works fine.
SteveSandersonMS commentedon Feb 12, 2026
Thanks! We'll update this to use a longer timeout.
Fix .NET SDK CLI download timeout
Fix .NET SDK CLI download timeout (github#493)
Fix .NET SDK CLI download timeout (#493)