Convert json pipeline to Aggify query

this is my pipeline , how can i convert this to Aggify query

I need to simplify some of my queries by using the aggify generator, which is a python package, so that it can be read and I can query faster. But I have problems in some parts, like this question, which is a bit complicated

Aggify : https://github.com/Aggify/aggify

pipeline = [
                {
                    '$match': {
                        'owner_id': ObjectId(account_id)
                    }
                }, {
                    '$lookup': {
                        'from': 'discussion',
                        'let': {
                            'id': '$_id'
                        },
                        'pipeline': [
                            {
                                '$match': {
                                    '$expr': {
                                        '$and': [
                                            {
                                                '$eq': [
                                                    '$parent_id', '$$id'
                                                ]
                                            }, {
                                                '$ne': [
                                                    '$owner_id', ObjectId(account_id)
                                                ]
                                            }
                                        ]
                                    }
                                }
                            }
                        ],
                        'as': 'replies'
                    }
                }
            ]