Stage 2 of the AI film pipeline — build and lock 3-panel character reference sheets (full-body front, full-body back, close-up headshot on plain grey) for every character who must hold a face across cuts; derive wardrobe variants (same face in a different kit) and aged variants (the hero at 7) from the locked sheet; decide when a one-off character can be text-only and how to stop the hero's face leaking onto them. Use when any person appears in a film.