myhome/.config/karabiner/karabiner.json

{
    "global": { "show_in_menu_bar": false },
    "profiles": [
        {
            "complex_modifications": {
                "rules": [
                    {
                        "description": "Change right_command+hjkl to arrow keys",
                        "manipulators": [
                            {
                                "from": {
                                    "key_code": "h",
                                    "modifiers": {
                                        "mandatory": ["right_command"],
                                        "optional": ["any"]
                                    }
                                },
                                "to": [{ "key_code": "left_arrow" }],
                                "type": "basic"
                            },
                            {
                                "from": {
                                    "key_code": "j",
                                    "modifiers": {
                                        "mandatory": ["right_command"],
                                        "optional": ["any"]
                                    }
                                },
                                "to": [{ "key_code": "down_arrow" }],
                                "type": "basic"
                            },
                            {
                                "from": {
                                    "key_code": "k",
                                    "modifiers": {
                                        "mandatory": ["right_command"],
                                        "optional": ["any"]
                                    }
                                },
                                "to": [{ "key_code": "up_arrow" }],
                                "type": "basic"
                            },
                            {
                                "from": {
                                    "key_code": "l",
                                    "modifiers": {
                                        "mandatory": ["right_command"],
                                        "optional": ["any"]
                                    }
                                },
                                "to": [{ "key_code": "right_arrow" }],
                                "type": "basic"
                            }
                        ]
                    }
                ]
            },
            "devices": [
                {
                    "fn_function_keys": [
                        {
                            "from": { "key_code": "f1" },
                            "to": [{ "consumer_key_code": "mute" }]
                        },
                        {
                            "from": { "key_code": "f2" },
                            "to": [{ "consumer_key_code": "volume_decrement" }]
                        },
                        {
                            "from": { "key_code": "f3" },
                            "to": [{ "consumer_key_code": "volume_increment" }]
                        },
                        {
                            "from": { "key_code": "f10" },
                            "to": [{ "consumer_key_code": "play_or_pause" }]
                        },
                        {
                            "from": { "key_code": "f11" },
                            "to": [{ "consumer_key_code": "display_brightness_decrement" }]
                        },
                        {
                            "from": { "key_code": "f12" },
                            "to": [{ "consumer_key_code": "display_brightness_increment" }]
                        }
                    ],
                    "identifiers": {
                        "is_keyboard": true,
                        "product_id": 591,
                        "vendor_id": 1452
                    },
                    "simple_modifications": [
                        {
                            "from": { "key_code": "caps_lock" },
                            "to": [{ "key_code": "escape" }]
                        },
                        {
                            "from": { "key_code": "down_arrow" },
                            "to": [{ "pointing_button": "button32" }]
                        },
                        {
                            "from": { "key_code": "escape" },
                            "to": [{ "key_code": "grave_accent_and_tilde" }]
                        },
                        {
                            "from": { "key_code": "left_arrow" },
                            "to": [{ "pointing_button": "button32" }]
                        },
                        {
                            "from": { "key_code": "left_command" },
                            "to": [{ "key_code": "left_option" }]
                        },
                        {
                            "from": { "key_code": "left_option" },
                            "to": [{ "key_code": "right_command" }]
                        },
                        {
                            "from": { "key_code": "right_arrow" },
                            "to": [{ "pointing_button": "button32" }]
                        },
                        {
                            "from": { "key_code": "right_command" },
                            "to": [{ "key_code": "right_option" }]
                        },
                        {
                            "from": { "key_code": "up_arrow" },
                            "to": [{ "pointing_button": "button32" }]
                        }
                    ]
                },
                {
                    "identifiers": {
                        "is_keyboard": true,
                        "product_id": 631,
                        "vendor_id": 1452
                    },
                    "simple_modifications": [
                        {
                            "from": { "key_code": "non_us_backslash" },
                            "to": [{ "key_code": "grave_accent_and_tilde" }]
                        },
                        {
                            "from": { "key_code": "right_command" },
                            "to": [{ "key_code": "right_option" }]
                        }
                    ]
                },
                {
                    "identifiers": {
                        "is_keyboard": true,
                        "product_id": 6194,
                        "vendor_id": 4152
                    },
                    "ignore": true,
                    "manipulate_caps_lock_led": false
                },
                {
                    "identifiers": {
                        "is_keyboard": true,
                        "product_id": 615,
                        "vendor_id": 76
                    },
                    "simple_modifications": [
                        {
                            "from": { "key_code": "right_command" },
                            "to": [{ "key_code": "right_option" }]
                        }
                    ]
                },
                {
                    "identifiers": {
                        "is_pointing_device": true,
                        "product_id": 6194,
                        "vendor_id": 4152
                    },
                    "simple_modifications": [
                        {
                            "from": { "pointing_button": "button5" },
                            "to": [{ "apple_vendor_keyboard_key_code": "launchpad" }]
                        }
                    ]
                },
                {
                    "identifiers": {
                        "is_keyboard": true,
                        "product_id": 30264,
                        "vendor_id": 3141
                    },
                    "simple_modifications": [
                        {
                            "from": { "key_code": "escape" },
                            "to": [{ "key_code": "grave_accent_and_tilde" }]
                        },
                        {
                            "from": { "key_code": "left_command" },
                            "to": [{ "key_code": "left_option" }]
                        },
                        {
                            "from": { "key_code": "left_option" },
                            "to": [{ "key_code": "right_command" }]
                        }
                    ]
                },
                {
                    "identifiers": { "is_keyboard": true },
                    "simple_modifications": [
                        {
                            "from": { "key_code": "right_command" },
                            "to": [{ "key_code": "right_option" }]
                        },
                        {
                            "from": { "key_code": "right_option" },
                            "to": [{ "key_code": "right_command" }]
                        }
                    ]
                },
                {
                    "identifiers": {
                        "is_keyboard": true,
                        "product_id": 34056,
                        "vendor_id": 3141
                    },
                    "simple_modifications": [
                        {
                            "from": { "key_code": "left_command" },
                            "to": [{ "key_code": "left_option" }]
                        },
                        {
                            "from": { "key_code": "left_option" },
                            "to": [{ "key_code": "right_command" }]
                        }
                    ]
                },
                {
                    "identifiers": {
                        "is_keyboard": true,
                        "product_id": 615,
                        "vendor_id": 1452
                    },
                    "simple_modifications": [
                        {
                            "from": { "consumer_key_code": "eject" },
                            "to": [{ "consumer_key_code": "al_terminal_lock_or_screensaver" }]
                        }
                    ]
                },
                {
                    "identifiers": {
                        "is_keyboard": true,
                        "product_id": 668,
                        "vendor_id": 76
                    },
                    "simple_modifications": [
                        {
                            "from": { "key_code": "right_command" },
                            "to": [{ "key_code": "right_option" }]
                        },
                        {
                            "from": { "key_code": "right_option" },
                            "to": [{ "key_code": "right_command" }]
                        }
                    ]
                },
                {
                    "identifiers": {
                        "is_keyboard": true,
                        "product_id": 45929,
                        "vendor_id": 1133
                    },
                    "manipulate_caps_lock_led": false,
                    "simple_modifications": [
                        {
                            "from": { "key_code": "right_command" },
                            "to": [{ "key_code": "right_option" }]
                        },
                        {
                            "from": { "key_code": "right_option" },
                            "to": [{ "key_code": "right_command" }]
                        }
                    ]
                },
                {
                    "fn_function_keys": [
                        {
                            "from": { "key_code": "f1" },
                            "to": [{ "key_code": "f1" }]
                        },
                        {
                            "from": { "key_code": "f2" },
                            "to": [{ "key_code": "f2" }]
                        },
                        {
                            "from": { "key_code": "f11" },
                            "to": [{ "key_code": "f11" }]
                        }
                    ],
                    "identifiers": {
                        "is_keyboard": true,
                        "product_id": 785,
                        "vendor_id": 13364
                    }
                },
                {
                    "identifiers": {
                        "is_keyboard": true,
                        "product_id": 666,
                        "vendor_id": 76
                    },
                    "ignore": true
                }
            ],
            "fn_function_keys": [
                {
                    "from": { "key_code": "f5" },
                    "to": [{ "key_code": "f5" }]
                },
                {
                    "from": { "key_code": "f6" },
                    "to": [{ "key_code": "f13" }]
                }
            ],
            "name": "Default profile",
            "selected": true,
            "simple_modifications": [
                {
                    "from": { "consumer_key_code": "eject" },
                    "to": [{ "consumer_key_code": "al_terminal_lock_or_screensaver" }]
                },
                {
                    "from": { "key_code": "caps_lock" },
                    "to": [{ "key_code": "escape" }]
                },
                {
                    "from": { "key_code": "left_command" },
                    "to": [{ "key_code": "right_command" }]
                },
                {
                    "from": { "key_code": "grave_accent_and_tilde" },
                    "to": [{ "key_code": "non_us_backslash" }]
                }
            ],
            "virtual_hid_keyboard": {
                "country_code": 0,
                "keyboard_type_v2": "iso"
            }
        }
    ]
}