I've been working on a similar problem from the browser side (since most of my sensitive stuff lives in tabs - email, Slack, Notion). Different angle but same pain point.
Curious about the multi-monitor scenario - if I'm sharing Screen 1 but a cloaked window spans both monitors, does it cloak the whole window or just what's visible on the shared screen?
Also wondering about the "forgot to cloak" problem. I know I'd 100% forget to toggle before a call at least once a week. Any plans for persistent rules like "always cloak windows matching X pattern"? The mental overhead of remembering seems like it could be a blocker.
Congrats on shipping - the pain point is very real. Have you seen any performance hit on the capture stream itself? Some screen share tools get weird when windows are programmatically hidden.