{
  "version": 1,
  "required": [
    "Brand URL or source-grounded brief",
    "One ad angle and approved lyrics in three song sections",
    "One recurring hero object and three distinct lyric-led Lego events"
  ],
  "optional": [
    "Existing 10–30 second song",
    "Existing world reference, three separate full-quality stills and three moving clips",
    "Authorized brand logo"
  ],
  "file": "agent-runs/<run>/input.json",
  "template": "npm run format:lego -- init --run=my-ad --brief='Your brief'",
  "contract": "scene-contract.json",
  "media": "All media must be local relative files inside the input directory. No remote URLs, parent traversal, or external symlinks. Import copies and measures them."
}