Dotnet testing
Skill novotnyllc/dotnet-artisan/plugins/dotnet-artisan/skills/dotnet-testing
Comprehensive .NET development skills for modern C# and .NETFrom the repository description
npx -y skills add novotnyllc/dotnet-artisan --skill dotnet-testingAssembled from the repository path, not quoted from the project. Check it against their README if it does not work.