Csharp nullable reference types
Skill Aaronontheweb/dotnet-skills/skills/csharp-nullable-reference-types
Claude Code skills and sub-agents for .NET DevelopersFrom the repository description
npx -y skills add Aaronontheweb/dotnet-skills --skill csharp-nullable-reference-typesAssembled from the repository path, not quoted from the project. Check it against their README if it does not work.