{
  "contract_id": "p7-5-1-background-style-v3",
  "purpose": "Further-compressed shared P7-5.1 background-only style prompt. Scene prompts supply place, time, and camera separately.",
  "common_contract": "Empty edge-to-edge illustrated watercolor background; thin charcoal lines, transparent wet-on-wet watercolor, pigment pooling, granulation, cool shadows, medium-chroma color. No frame, text, logos, people, animals, vehicles, neon, photorealism, hatching, or screentone.",
  "character_scene_style_prompt": "Edge-to-edge illustrated watercolor character scene; thin charcoal lines, transparent wet-on-wet watercolor, pigment pooling, granulation, cool shadows, and medium-chroma color. No frame, text, logos, neon, photorealism, hatching, or screentone.",
  "fixed_checks": [
    "edge-to-edge background without an outer frame or dark border",
    "sparse thin charcoal contour and structure lines",
    "transparent watercolor layers with wet-on-wet blooms, pigment pooling, granulation, and translucent edges",
    "separate readable lit planes, cool shadows, and reflected-light accents",
    "natural medium-chroma pigment without neon, opaque airbrush, photorealistic, screentone, dense hatching, or thick comic outlines",
    "no readable signs, logos, people, animals, or vehicles"
  ],
  "assembly_rule": "Append this common_contract to exactly one scene prompt; scene prompts may change only location, time, camera, and scene-specific palette constraints."
}