ETag Response Branch Walkthrough

Make a 12-second technical animation from [verified conditional request fixture]. Compare two exact tag labels, follow the documented response branch and show whether a body is transferred. Use editable header text and a stable resource icon. Do not animate a payload in a contract-defined bodyless response.

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.