It’s a BYOK so the ai is optional. (And if you really don’t want it it’s a package in the open source app that can easily be pulled out) Since it’s markdown and on filesystem you can just edit your notes with Claude code if you want similar to obsidian.

By lightweight I mean it’s not a super heavy and bloated electron app on desktop and a slow and janky capacitor app on mobile that takes 10 seconds to launch and that the project can be greppable in a day to build on