Karabiner : Diamond Cursor : Change option + I/J/K/L to Arrow Keys

karabiner_diamond_cursor_option_ijkl.json

{
    "title": "Diamond Cursor",
    "rules": [
        {
            "description": "Change option + I/J/K/L to Arrow Keys",
            "manipulators": [
                {
                    "type": "basic",
                    "from": {
                        "key_code": "i",
                        "modifiers": {
                            "mandatory": ["option"],
                            "optional": ["any"]
                        }
                    },
                    "to": [{"key_code": "up_arrow"}]
                },
                {
                    "type": "basic",
                    "from": {
                        "key_code": "j",
                        "modifiers": {
                            "mandatory": ["option"],
                            "optional": ["any"]
                        }
                    },
                    "to": [{"key_code": "left_arrow"}]
                },
                {
                    "type": "basic",
                    "from": {
                        "key_code": "k",
                        "modifiers": {
                            "mandatory": ["option"],
                            "optional": ["any"]
                        }
                    },
                    "to": [{"key_code": "down_arrow"}]
                },
                {
                    "type": "basic",
                    "from": {
                        "key_code": "l",
                        "modifiers": {
                            "mandatory": ["option"],
                            "optional": ["any"]
                        }
                    },
                    "to": [{"key_code": "right_arrow"}]
                }
            ]
        }
    ]
}

Host the JSON somewhere
Open URL : karabiner://karabiner/assets/complex_modifications/import?url=<https://json_url>