jgl_sunlit_patch/kubejs/data/sophisticatedbackpacks/recipes/magnet_upgrade.json

{
  "type": "sophisticatedcore:upgrade_next_tier",
  "conditions": [
    {
      "type": "sophisticatedcore:item_enabled",
      "itemRegistryName": "sophisticatedbackpacks:magnet_upgrade"
    }
  ],
  "key": {
    "M": {
      "item": "simplemagnets:basicmagnet"
    },
    "I": {
      "tag": "forge:ingots/iron"
    },
    "P": {
      "item": "sophisticatedbackpacks:upgrade_base"
    }
  },
  "pattern": ["III", "IPI", "IMI"],
  "result": {
    "item": "sophisticatedbackpacks:magnet_upgrade"
  }
}