{
  "cases": [
    {
      "id": "product",
      "width": 2048,
      "height": 2048,
      "seed": 731,
      "prompt": "Square editorial studio photograph of a dark cobalt glass perfume bottle on pale travertine. The centered cream label reads exactly 'NIGHT TIDE' in large engraved serif letters and 'EAU DE PARFUM' in small capitals beneath. Dappled blue caustics, crisp glass edges, fine pores in the stone, dark reflections through the translucent bottle, restrained palette and generous negative space. No other text."
    },
    {
      "id": "portrait",
      "width": 2048,
      "height": 2048,
      "seed": 1234,
      "prompt": "An intimate natural-light portrait of an elderly woman in a botanical conservatory, reading a small red clothbound book. Warm brown skin with visible freckles and fine wrinkles, silver curls lit from behind, intricate indigo knit cardigan. Soft fern fronds out of focus in the foreground; detailed hands and realistic skin texture. A candid 85mm color photograph with gentle shadows and no lettering."
    },
    {
      "id": "edit",
      "width": 1024,
      "height": 1024,
      "seed": 42,
      "prompt": "Change the cobalt blue glass perfume bottle in <Picture 1> to deep emerald green glass. Preserve the pale engraved NIGHT TIDE label, exact lettering, bottle shape, cap, stone backdrop, composition, lighting and shadows. The glass should be visibly green with realistic emerald highlights and reflections.",
      "images": [
        "experiments/reference-bottle.png"
      ]
    },
    {
      "id": "holdout-detail",
      "width": 2048,
      "height": 2048,
      "seed": 928417,
      "prompt": "A meticulous natural light still life on a wooden watchmaker's bench: a silver mechanical wristwatch with a clear glass back, brass gears and hair-thin springs, a folded cream linen glove, a small matte ceramic bowl and a card reading 'SECOND LIGHT'. In the background a woman with warm brown freckled skin holds a magnifying lens, her hands realistically detailed. Fine brushed metal, subtle skin pores, smooth dark-to-light blue gradients and soft window reflections, editorial macro photography."
    }
  ],
  "timing_cases": [
    "product",
    "portrait"
  ],
  "control_config": {
    "wired_gb": 32,
    "compile_blocks": true,
    "eval_every": 0,
    "prefetch_blocks": 4,
    "vae_batch": 4,
    "vae_compile": true,
    "cache_refined_text": true,
    "weight_storage": "packed12",
    "rng": "torch",
    "six_original_steps": true,
    "kernel": "native"
  },
  "holdout_rule": "Same fixed suite as round 03; these are reused validation cases and not fresh blind holdouts.",
  "shape_fallback_validation": "native-4k uses existing reference and no tile outside measured shape gets auto dispatch"
}