Karabiner configuration for better keyboard shortcuts accessing special characters needed for programming

karabiner-config.json

{
    "description": "Meine Sonderzeichen",
    "manipulators": [
        {
            "from": {
                "key_code": "grave_accent_and_tilde",
                "modifiers": {
                    "optional": [
                        "any"
                    ]
                }
            },
            "to": [
                {
                    "set_variable": {
                        "name": "meine_sond_mod",
                        "value": 1
                    }
                }
            ],
            "to_after_key_up": [
                {
                    "set_variable": {
                        "name": "meine_sond_mod",
                        "value": 0
                    }
                }
            ],
            "type": "basic"
        },
        {
            "conditions": [
                {
                    "name": "meine_sond_mod",
                    "type": "variable_if",
                    "value": 1
                }
            ],
            "from": {
                "key_code": "j"
            },
            "to": [
                {
                    "key_code": "8",
                    "modifiers": [
                        "left_option"
                    ]
                }
            ],
            "type": "basic"
        },
        {
            "conditions": [
                {
                    "name": "meine_sond_mod",
                    "type": "variable_if",
                    "value": 1
                }
            ],
            "from": {
                "key_code": "k"
            },
            "to": [
                {
                    "key_code": "9",
                    "modifiers": [
                        "left_option"
                    ]
                }
            ],
            "type": "basic"
        },
        {
            "conditions": [
                {
                    "name": "meine_sond_mod",
                    "type": "variable_if",
                    "value": 1
                }
            ],
            "from": {
                "key_code": "u"
            },
            "to": [
                {
                    "key_code": "grave_accent_and_tilde",
                    "repeat": false
                }
            ],
            "type": "basic"
        },
        {
            "conditions": [
                {
                    "name": "meine_sond_mod",
                    "type": "variable_if",
                    "value": 1
                }
            ],
            "from": {
                "key_code": "i"
            },
            "to": [
                {
                    "key_code": "grave_accent_and_tilde",
                    "modifiers": [
                        "left_shift"
                    ],
                    "repeat": false
                }
            ],
            "type": "basic"
        },
        {
            "conditions": [
                {
                    "name": "meine_sond_mod",
                    "type": "variable_if",
                    "value": 1
                }
            ],
            "from": {
                "key_code": "h"
            },
            "to": [
                {
                    "key_code": "7",
                    "modifiers": [
                        "left_option"
                    ],
                    "repeat": false
                }
            ],
            "type": "basic"
        },
        {
            "conditions": [
                {
                    "name": "meine_sond_mod",
                    "type": "variable_if",
                    "value": 1
                }
            ],
            "from": {
                "key_code": "n"
            },
            "to": [
                {
                    "key_code": "n",
                    "modifiers": [
                        "left_option"
                    ]
                }
            ],
            "type": "basic"
        },
        {
            "conditions": [
                {
                    "name": "meine_sond_mod",
                    "type": "variable_if",
                    "value": 1
                }
            ],
            "from": {
                "key_code": "l"
            },
            "to": [
                {
                    "key_code": "l",
                    "modifiers": [
                        "left_option"
                    ]
                }
            ],
            "type": "basic"
        },
        {
            "conditions": [
                {
                    "name": "meine_sond_mod",
                    "type": "variable_if",
                    "value": 1
                }
            ],
            "from": {
                "key_code": "8"
            },
            "to": [
                {
                    "key_code": "5",
                    "modifiers": [
                        "left_option"
                    ]
                }
            ],
            "type": "basic"
        },
        {
            "conditions": [
                {
                    "name": "meine_sond_mod",
                    "type": "variable_if",
                    "value": 1
                }
            ],
            "from": {
                "key_code": "9"
            },
            "to": [
                {
                    "key_code": "6",
                    "modifiers": [
                        "left_option"
                    ]
                }
            ],
            "type": "basic"
        },
        {
            "conditions": [
                {
                    "name": "meine_sond_mod",
                    "type": "variable_if",
                    "value": 1
                }
            ],
            "from": {
                "key_code": "7"
            },
            "to": [
                {
                    "key_code": "7",
                    "modifiers": [
                        "left_shift",
                        "left_option"
                    ],
                    "repeat": false
                }
            ],
            "type": "basic"
        }
    ]
}