This is a well-structured skill for building .NET 8+ applications with modern C# idioms baked in. It enforces nullable reference types, file-scoped namespaces, and proper cancellation token threading through async calls, which is honestly refreshing given how often those get skipped. The EF Core migration checkpoint is a nice touch that could save you from production headaches. It covers the full Microsoft stack (Minimal APIs, Blazor, Entity Framework, MediatR for CQRS) and includes reference guides that load contextually. The Result pattern implementation and the hard line against blocking async calls show this was written by someone who's debugged deadlocks at 2am. Good for greenfield projects or teams trying to standardize on current .NET patterns.
npx skills add https://github.com/jeffallan/claude-skills --skill csharp-developer