feat(vps): add vps host

modules/hosts/vps/config.nix

@@ -0,0 +1,57 @@
+{ config, ... }:
+{
+  flake.modules.nixos.vps =
+    {
+      hostName,
+      modulesPath,
+      ...
+    }:
+    {
+      imports =
+        with config.flake.modules.nixos;
+        [
+          boot
+          hardware
+          networking
+          virtualisation
+          services
+        ]
+        ++ [
+          (modulesPath + "/profiles/qemu-guest.nix")
+        ];
+
+      tnix = {
+        boot = {
+          legacy.enable = true;
+
+          impermanence = {
+            enable = true;
+
+            home = {
+              directories = [
+                ".local/share/nvim"
+                ".local/share/zsh"
+                ".local/share/zoxide"
+                ".local/state/lazygit"
+              ];
+            };
+          };
+        };
+
+        networking.openssh.enable = true;
+
+        virtualisation = {
+          docker.enable = true;
+        };
+      };
+
+      # --- Networking ---
+      networking = {
+        hostName = hostName;
+        networkmanager.enable = true;
+        firewall.enable = false;
+      };
+
+      system.stateVersion = "26.05";
+    };
+}

modules/hosts/vps/default.nix

@@ -0,0 +1,23 @@
+{
+  inputs,
+  config,
+  ...
+}:
+let
+  hostName = "vps";
+  userName = "tux";
+  userEmail = "t@tux.rs";
+  system = "x86_64-linux";
+  unstable = true;
+  nixpkgs = if unstable then inputs.nixpkgs else inputs.nixpkgs-stable;
+in
+{
+  flake.nixosConfigurations."${hostName}" = nixpkgs.lib.nixosSystem {
+    inherit system;
+    specialArgs = { inherit hostName userName userEmail; };
+    modules = [
+      config.flake.modules.nixos.core
+      config.flake.modules.nixos.${hostName}
+    ];
+  };
+}

modules/hosts/vps/disko.nix

@@ -0,0 +1,82 @@
+{ inputs, ... }:
+{
+  flake.modules.nixos.vps =
+    { config, lib, ... }:
+    let
+      hasOptinPersistence = config.tnix.boot.impermanence.enable;
+      isLegacy = config.tnix.boot.legacy.enable;
+    in
+    {
+      imports = [
+        inputs.disko.nixosModules.disko
+      ];
+
+      disko.devices.disk.primary = {
+        device = "/dev/sda";
+        type = "disk";
+        content = {
+          type = "gpt";
+          partitions = {
+            ESP = {
+              size = "1G";
+              type = "EF00";
+              content = {
+                type = "filesystem";
+                format = "vfat";
+                mountpoint = "/boot";
+                mountOptions = [
+                  "defaults"
+                  "umask=0077"
+                ];
+              };
+            };
+            root = {
+              size = "100%";
+              type = "8300";
+              content = {
+                type = "btrfs";
+                # Base subvolumes that always exist
+                subvolumes = {
+                  "/root" = {
+                    mountOptions = [
+                      "compress=zstd"
+                      "noatime"
+                      "space_cache=v2"
+                    ];
+                    mountpoint = "/";
+                  };
+                  "/nix" = {
+                    mountOptions = [
+                      "compress=zstd"
+                      "noatime"
+                      "noacl"
+                      "space_cache=v2"
+                    ];
+                    mountpoint = "/nix";
+                  };
+                }
+                # Conditionally merge /persist only when impermanence is enabled
+                // lib.optionalAttrs hasOptinPersistence {
+                  "/persist" = {
+                    mountOptions = [
+                      "compress=zstd"
+                      "noatime"
+                      "space_cache=v2"
+                    ];
+                    mountpoint = "/persist";
+                  };
+                };
+              };
+            };
+          }
+          // lib.optionalAttrs isLegacy {
+            boot = {
+              name = "boot";
+              size = "1M";
+              type = "EF02";
+            };
+          };
+        };
+      };
+    };
+}

modules/hosts/vps/home.nix

@@ -0,0 +1,6 @@
+{ ... }:
+{
+  flake.modules.homeManager.vps = {
+    home.stateVersion = "26.05";
+  };
+}