jgl_sunlit_patch/kubejs/data/beachparty/recipes/swim_wings.json

{
    "type": "minecraft:crafting_shaped",
    "pattern": [
        "##",
        "##"
    ],
    "key": {
        "#": {
            "item": "society:rubber"
        }
    },
    "result": {
        "item": "beachparty:swim_wings",
        "count": 1
    }
}