Nightwatch crops every frame into a confidential dossier — scan-frame, bounding box, checksum. One surgical magenta strip tells you exactly what is being watched.
Frames arrive raw; Nightwatch crops the subject, holds a bounding box, and writes the finding to the file. Nothing decorative — every mark is a piece of evidence.
The subject entered frame at 03:14, stayed inside the box for forty-one seconds, then left east. Checksum stable; no ghosts. The night desk gets one line, not a video to scrub.
Every frame is cropped inside a bracket with a floating bounding box — the subject, isolated, nothing else.
A thin magenta tab on the seam carries the state: tracked, clear, on hold. State you can read at a glance.
Exposure, port, ghost count — terminal microtext runs the edge, so the page reads like a real file.