Karabiner config for Ilya Birman's typography layouts on left-and-right-from-the-space modifier single press

karabiner.json

{
    "profiles": [
        {
            "complex_modifications": {
                "rules": [
                    {
                        "description": "Change input source to Birman Layout.",
                        "manipulators": [
                            {
                                "from": {
                                    "key_code": "left_control",
                                    "modifiers": {
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "left_control"
                                    }
                                ],
                                "to_if_alone": [
                                    {
                                        "select_input_source": {
                                            "input_source_id": "english–ilyabirmantypography"
                                        }
                                    }
                                ],
                                "type": "basic"
                            },
                            {
                                "from": {
                                    "key_code": "left_option",
                                    "modifiers": {
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "left_option"
                                    }
                                ],
                                "to_if_alone": [
                                    {
                                        "select_input_source": {
                                            "input_source_id": "english–ilyabirmantypography"
                                        }
                                    }
                                ],
                                "type": "basic"
                            },
                            {
                                "from": {
                                    "key_code": "left_command",
                                    "modifiers": {
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "left_command"
                                    }
                                ],
                                "to_if_alone": [
                                    {
                                        "select_input_source": {
                                            "input_source_id": "english–ilyabirmantypography"
                                        }
                                    }
                                ],
                                "type": "basic"
                            },
                            {
                                "from": {
                                    "key_code": "right_option",
                                    "modifiers": {
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "right_option"
                                    }
                                ],
                                "to_if_alone": [
                                    {
                                        "select_input_source": {
                                            "input_source_id": "russian–ilyabirmantypography"
                                        }
                                    }
                                ],
                                "type": "basic"
                            },
                            {
                                "from": {
                                    "key_code": "right_command",
                                    "modifiers": {
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "right_command"
                                    }
                                ],
                                "to_if_alone": [
                                    {
                                        "select_input_source": {
                                            "input_source_id": "russian–ilyabirmantypography"
                                        }
                                    }
                                ],
                                "type": "basic"
                            }
                        ]
                    }
                ]
            }
        }
    ]
}