You could look at http://warrior.archiveteam.org/ and https://github.com/ArchiveBox/good-karma-kit

Not open-source but I’ve used chatgpt to write tailored cover letters based on my cv and the job description, and afterwards I’d tweak it to fix the things it got wrong.

I used to run a proxmox server with windows in a VM that had a GPU via gpu passthrough. Then connected to it via parsec. On my laptop connected to the local network it was pretty good.