This gets Mailpit wired up with .NET Aspire so you can test email flows without actually sending messages. It's the kind of thing you drop into your dev environment when you need to verify registration emails, password resets, or notification logic without touching a real SMTP server. Aaron's packaged it with clear guidance on when to reach for it versus related skills like MJML templating or snapshot testing. The integration testing angle is solid. It's a focused tool that does one thing well, and the 229 installs suggest people are finding it when they need it.
npx skills add https://github.com/aaronontheweb/dotnet-skills --skill mailpit-integration