Building a wearable AI that processes everything on-device (no stored video). What would you want to verify?

I’m working on a clip-on wearable AI that uses computer vision to generate real-time “social + environment” signals (attention/glances, basic emotion cues, gestures, plus things like noise/air quality depending on the mode). The part I’m most focused on is privacy architecture: the device processes frames locally and discards them instantly. No photo library, no video archive, no “upload later.” It’s meant to behave like a sensor than a camera.