Fellies/kubejs[atm]/server_scripts/upgrade.js

events.listen('recipes', function (e) {

  function upgrade(material, previous, next) {
    e.recipes.allthemodium.atmshaped_crafting({
      pattern: [
        'XXX',
        'XYX'
      ],
      key: {
        X: {
          tag: 'forge:' + material
        },
        Y: {
          item: previous + '_helmet'
        }
      },
      result: {
        item: next + '_helmet'
      }
    })
    e.recipes.allthemodium.atmshaped_crafting({
      pattern: [
        'XYX',
        'XXX',
        'XXX'
      ],
      key: {
        X: {
          tag: 'forge:' + material
        },
        Y: {
          item: previous + '_chestplate'
        }
      },
      result: {
        item: next + '_chestplate'
      }
    })
    e.recipes.allthemodium.atmshaped_crafting({
      pattern: [
        'XXX',
        'XYX',
        'X X'
      ],
      key: {
        X: {
          tag: 'forge:' + material
        },
        Y: {
          item: previous + '_leggings'
        }
      },
      result: {
        item: next + '_leggings'
      }
    })
    e.recipes.allthemodium.atmshaped_crafting({
      pattern: [
        'XYX',
        'X X'
      ],
      key: {
        X: {
          tag: 'forge:' + material
        },
        Y: {
          item: previous + '_boots'
        }
      },
      result: {
        item: next + '_boots'
      }
    })
  }
  upgrade('ingots/iron', 'minecraft:leather', 'minecraft:iron')
  upgrade('ingots/iron', 'minecraft:leather', 'minecraft:iron')
  upgrade('gems/diamond', 'minecraft:iron', 'minecraft:diamond')
  upgrade('ingots/allthemodium', 'minecraft:netherite', 'allthemodium:allthemodium')
})