I want to develop a plugin that shows what links on Umbraco are broken, so the user can fix them. I created a custom Dashboard, but now I need to create the controllers that will tell me what links are broken, by either looking into the database or crawling the website. My question is, where should I place the files? Is there any convection for that? What plugins usually do?

@nobody7781 A good place to start is usually some other packages, i tend to check out the marketplace for packages, then head to the github of those packages to check the src

Do you know any package for this? I searched a little and found nothing really

https://github.com/enkelmedia/TheDashboard https://github.com/KevinJump/uSync https://github.com/skybrud/Skybrud.Umbraco.Redirects I would also check the docs about package development, see what the requirement / limitations are