{
  "schemaVersion": 2,
  "type": "object",
  "additionalProperties": false,
  "forbidden": ["sourceVideo"],
  "required": ["schemaVersion", "title", "audience", "format", "steps"],
  "properties": {
    "schemaVersion": {"const": 2},
    "title": {"type": "string", "minLength": 1, "maxLength": 80},
    "audience": {"type": "string", "minLength": 1, "maxLength": 120},
    "format": {"type": "object", "required": ["name", "slug", "promise", "url", "outputLabel"]},
    "steps": {
      "type": "array",
      "minItems": 4,
      "maxItems": 14,
      "items": {
        "required": ["id", "kind", "number", "label", "background", "durationSeconds"],
        "kind": ["hero", "browser", "terminal", "media", "final", "end", "social-proof", "package-breakdown", "any-show", "replacement-value", "scorecard", "checklist", "workflow"],
        "background": ["lime", "blue", "cream"],
        "media": "Authorized image or video under media/, with provenance and optional startSeconds/fit.",
        "narration": "Authorized local audio under media/, with provenance and startSeconds.",
        "captions": "Ordered timed phrases relative to the step; required with narration.",
        "checkpoint": "Optional neon eyebrow/headline/badge callout.",
        "nativeAudio": "Allowed only for hero/final video; required for the single final step."
      }
    },
    "music": "Optional authorized local audio under media/, long enough for the entire timeline; volume > 0 and <= 0.35."
  },
  "crossFieldRules": [
    "sourceVideo is rejected: users supply editable ingredients, never a pre-rendered tutorial master.",
    "At least one browser step, one terminal step, two narrated steps, one checkpoint, and exactly one final step are required.",
    "Every local media path is relative to media/, regular, non-symlinked, <=250 MB, authorized, and carries provenance.",
    "Video sections must have enough source duration; the runtime never loops or freezes short media.",
    "The ingredient timeline must be 12–240 seconds and align to 30 fps."
  ],
  "canonicalValidator": "runtime/contract.mjs"
}