{
  "kind": "building",
  "id": "03-economic",
  "role": "economic",
  "name": "Harvest Exchange",
  "function": "An agricultural cooperative combines enclosed growing space with packing, ration distribution and equipment repair.",
  "shape_and_silhouette": "Two unequal parallel barrel-roof halls meet a low transverse packing block, with a projecting rounded public vestibule and a square rear loading airlock.",
  "visual_description": "Gray steel ribs and cream insulated cassettes surround narrow amber roof strips, while small yellow and rust tiles soften the curved distribution entrance.",
  "production_notes": "This agricultural workshop belongs to the cooperative expansion tradition, using exposed steel framing, replaceable insulated metal panels and a later tiled public entrance.",
  "departure": "Paired lightweight roof arcs and an intimate curved threshold distinguish it from heavy residential terraces and monumental civic wedges.",
  "shared_traits": [
    "Growing-hall light strip",
    "Cooperative tiled vestibule",
    "Visible replacement cassettes"
  ],
  "constraints": [
    "All crops enclosed",
    "No open market stalls",
    "All sides designed",
    "Flat ground"
  ],
  "idle_animation": "An external guarded circulation fan turns slowly without changing the silhouette.",
  "day_night": "Growing-hall roof strips glow amber and the public vestibule gains a warm threshold light after dusk.",
  "version": 1,
  "image": "renders/render-v001.png",
  "approved": true,
  "city_snapshot": "renders/city-v001.md",
  "motif_snapshot": "renders/motifs-v001.md"
}