# Advanced

- [Middleware](/v1.4/advanced/middleware.md)
- [Creating Commands](/v1.4/advanced/creating-commands.md)
- [Creating Packages](/v1.4/advanced/creating-packages.md)
- [Publishing Packages](/v1.4/advanced/publishing-packages.md)
- [Validation](/v1.4/advanced/validation.md)
- [Extending Classes](/v1.4/advanced/extending-classes.md)
- [Creating a Mail Driver](/v1.4/advanced/creating-a-mail-driver.md)