I use Plasmo. Strongly recommend it. So much so I gave them a shout-out in a blog post just this Sunday (https://moddable.app/blog/unofficial-mod-support).

I don't really use the framework stuff but HMR that works really well is just chefs kiss.

I use it and it does a lot of what I used to do manual deployment

so I was wondering the same thing as GP, could this be a self-hosted plasmo of sorts