Ln 773 Cors Configurator

This handles CORS configuration for .NET and Python projects with environment-specific policies. It detects your frontend setup (React on 3000, Vite on 5173, etc.), generates the appropriate middleware or extension code, and enforces sane security defaults like no wildcard origins in production and explicit method allowlists. The skill is idempotent and checks if CORS is already configured before doing anything. What I like here is the built-in security checklist that stops you from shipping the classic AllowAnyOrigin with credentials mistake. It's part of the 7XX bootstrap series, so it expects context from ln-770 and returns structured JSON when done.