Add cross-platform Nix flake bootstrap

Adds a flake providing shared modules for NixOS and standalone
home-manager, a copyable NixOS host template, and the OpenSpec
tooling/change scaffolding used to plan this work.

1 files changed, 23 insertions, 0 deletions

diff --git a/hosts/template/configuration.nix b/hosts/template/configuration.nix
new file mode 100644
index 0000000..192ccb5
--- /dev/null
+++ b/hosts/template/configuration.nix
@@ -0,0 +1,23 @@
+# Copy-source only — this directory is never wired into flake.nix as a real
+# nixosConfigurations output. To bootstrap a real host:
+#   cp -r hosts/template hosts/<real-hostname>
+# then edit the CHANGEME values below and replace hardware-configuration.nix
+# with the output of `nixos-generate-config`. See README.md for the full flow.
+{ ... }:
+{
+  imports = [ ./hardware-configuration.nix ];
+
+  networking.hostName = "CHANGEME";
+
+  # UEFI (most modern machines):
+  boot.loader.systemd-boot.enable = true;
+  boot.loader.efi.canTouchEfiVariables = true;
+  # BIOS/legacy alternative — comment out the two lines above and use instead:
+  # boot.loader.grub.enable = true;
+  # boot.loader.grub.device = "/dev/sdX";
+
+  # Set to the NixOS release in use by the installer at install time
+  # (e.g. "24.05"). This only affects on-disk state format compatibility —
+  # never change it after the fact.
+  system.stateVersion = "CHANGEME";
+}