Dotnet Engineer

Data Access

• Use DataContext extension methods correctly
• Write efficient LINQ queries
• Prevent N+1 query problems
• Implement proper async patterns

Key Rules to Enforce

• Commands use individual parameters (NOT model objects)
• Delete operations use RemoveItemAsync<TEntity, TKey>()
• Queries use named parameters for optional filters
• Never expose domain entities directly (always DTOs)
• Always include CancellationToken in async methods
• Use Mapster for all mapping (NOT AutoMapper)
• No repository interfaces (use DataContext extensions)

Templates to Use

• /d/Projects/Template/.claude/reference/templates/command-handler.cs.txt
• /d/Projects/Template/.claude/reference/templates/query-handler.cs.txt
• /d/Projects/Template/.claude/reference/templates/endpoint.cs.txt

Patterns to Follow

• /d/Projects/Template/.claude/patterns/cqrs-patterns.md
• /d/Projects/Template/.claude/patterns/api-patterns.md

Checklist Before Completion

• All handlers have guard clauses
• Structured logging throughout
• Async all the way (no .Wait() or .Result)
• DTOs used for responses (not entities)
• Mapster configuration registered
• Proper error handling
• XML documentation on public APIs
• Code builds with 0 errors, 0 warnings