owly.fans/archinstall/user_disk_layout.json

{
    "/dev/sda": {
        "partitions": [
            {
                "boot": true,
                "encrypted": false,
                "filesystem": {
                    "format": "fat32"
                },
                "mountpoint": "/boot",
                "size": "512MiB",
                "start": "1MiB",
                "type": "primary",
                "wipe": true
            },
            {
                "btrfs": {
                    "subvolumes": [
                        {
                            "compress": false,
                            "mountpoint": "/",
                            "name": "@",
                            "nodatacow": false
                        },
                        {
                            "compress": false,
                            "mountpoint": "/home",
                            "name": "@home",
                            "nodatacow": false
                        },
                        {
                            "compress": false,
                            "mountpoint": "/var/log",
                            "name": "@log",
                            "nodatacow": false
                        },
                        {
                            "compress": false,
                            "mountpoint": "/var/cache/pacman/pkg",
                            "name": "@pkg",
                            "nodatacow": false
                        },
                        {
                            "compress": false,
                            "mountpoint": "/.snapshots",
                            "name": "@.snapshots",
                            "nodatacow": false
                        }
                    ]
                },
                "encrypted": false,
                "filesystem": {
                    "format": "btrfs",
                    "mount_options": [
                        "compress=zstd"
                    ]
                },
                "mountpoint": null,
                "size": "100%",
                "start": "513MiB",
                "type": "primary",
                "wipe": true
            }
        ],
        "wipe": true
    }
}