{
  "context": "Tests whether the agent produces structured acceptance criteria for adding a video variant to an existing Hero block without writing code. Covers variant behavior, video attributes, mobile fallback, impact assessment, edge cases, and accessibility.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "Variant behavior clearly defined",
      "description": "Describes what the video variant does differently from the existing image variant; clearly distinguishes the two variants' behavior",
      "max_score": 15
    },
    {
      "name": "Video attributes specified",
      "description": "Mentions autoplay, muted, and loop requirements for the background video",
      "max_score": 12
    },
    {
      "name": "Mobile fallback addressed",
      "description": "Poster image fallback on mobile is explicitly covered with criteria for when and how it triggers (e.g., viewport breakpoint, device detection, or connection speed)",
      "max_score": 15
    },
    {
      "name": "Impact on existing variant assessed",
      "description": "Confirms that the existing image variant must remain unchanged and functional; assesses risk of regression",
      "max_score": 10
    },
    {
      "name": "Edge cases identified",
      "description": "Addresses edge cases such as: video fails to load, no poster image provided, unsupported video format, very short or very long videos",
      "max_score": 12
    },
    {
      "name": "Responsive behavior specified",
      "description": "Mobile poster vs desktop video behavior is explicitly defined; tablet behavior is mentioned or addressed",
      "max_score": 10
    },
    {
      "name": "Author experience documented",
      "description": "Describes how the author enables the video variant and provides video/poster content (NOT implementation details like CSS classes or HTML attributes)",
      "max_score": 10
    },
    {
      "name": "Accessibility considered",
      "description": "Mentions reduced motion preference (prefers-reduced-motion), video without audio implications, or screen reader considerations",
      "max_score": 8
    },
    {
      "name": "Definition of done is testable",
      "description": "Specific, verifiable completion conditions that can be checked without ambiguity",
      "max_score": 8
    }
  ]
}