Ef Core

This gives Claude a solid foundation in EF Core patterns so it can spot common mistakes in your data access code. It'll catch things like missing AsNoTracking() on read queries, N+1 problems from poor Include usage, and bloated DbContext classes that mix concerns. The skill covers the full stack from entity design and migrations to performance tuning and testing strategies. Most useful when you're building out data layers or reviewing existing EF implementations. It's opinionated about things like using IEntityTypeConfiguration for complex models and DbContextFactory for non-web apps, which aligns well with Microsoft's current guidance.