[
    {
        "id": "basics",
        "inputs": [],
        "research": "",
        "crafttime": 1.0
    },
    {
        "id": "stoneage",
        "inputs": [
            {
                "item": "stone",
                "amount": 1
            },
            {
                "item": "coal",
                "amount": 1
            }
        ],
        "research": "basics",
        "crafttime": 1.0
    },
    {
        "id": "copperage",
        "inputs": [
            {
                "item": "copper_ore",
                "amount": 1
            },
            {
                "item": "rope",
                "amount": 1
            }
        ],
        "research": "stoneage",
        "crafttime": 1.0
    },
    {
        "id": "bronzeage",
        "inputs": [
            {
                "item": "copper_ingot",
                "amount": 1
            },
            {
                "item": "tin_ingot",
                "amount": 1
            }
        ],
        "research": "copperage",
        "crafttime": 1.0
    },
    {
        "id": "ironage",
        "inputs": [
            {
                "item": "bronze_ingot",
                "amount": 1
            },
            {
                "item": "dynamo_v1",
                "amount": 1
            },
            {
                "item": "battery_v1",
                "amount": 1
            }
        ],
        "research": "bronzeage",
        "crafttime": 1.0
    }
]