BigInt JSON Boundary Film

Create a 12-second boundary animation from [verified BigInt trace]. Stop the integer at the unsupported encoder, then show the approved string route as a separate branch. Keep digit count constant with editable overlays; do not animate truncation as a successful round trip.

Confirm required reference images and timing inputs are present before generating. Keep objects, identities, spatial relationships and light direction consistent. Render the clip when video generation is supported; otherwise supply a timed shot list, reference checklist and generation-ready prompt, labeled as a production plan. Do not claim rendered output without an actual file. Check the opening, transition and final frame against the stated counts and geometry.