{
  "ingredientPattern": "PP,__,PP",
  "ingredients": {
    "P": { "type": "item", "code": "game:plank-*", "allowedVariants": ["birch", "maple", "pine", "acacia", "kapok", "aged"], "name": "type" }
  },
  "width": 2,
  "height": 3,
  "output": { "type": "block", "code": "shelf-{type}-east" }
}
