Unfortunately, the last time I tested Harper inside Neovim, it alone used more than 1 GB of RAM for just the LSP! However, the concept is nice, open source, no AI, and easy to integrate.
I had a migraine for more than 15 years. After quitting caffeine completely as a self-experiment, it never came back. When the migraine came, I had it for at least 3 days without improving. So I had to take something with Triptan, like Dolortriptan.