Drop macOS-specific remote-program param from nix copy command

Reviewed-on: https://git.clan.lol/clan/clan-core/pulls/5693

CODEOWNERS

@@ -1,8 +1,10 @@
 clanServices/.* @pinpox @kenji
 
 lib/test/container-test-driver/.* @DavHau @mic92
-lib/modules/inventory/.* @hsjobeki
+lib/inventory/.* @hsjobeki
-lib/modules/inventoryClass/.* @hsjobeki
+lib/inventoryClass/.* @hsjobeki
+
+modules/.* @hsjobeki
 
 pkgs/clan-app/ui/.* @hsjobeki @brianmcgee
 pkgs/clan-app/clan_app/.* @qubasa @hsjobeki

checks/flake-module.nix

@@ -87,6 +87,7 @@ in
             # Container Tests
             nixos-test-container = self.clanLib.test.containerTest ./container nixosTestArgs;
             nixos-systemd-abstraction = self.clanLib.test.containerTest ./systemd-abstraction nixosTestArgs;
+            nixos-llm-test = self.clanLib.test.containerTest ./llm nixosTestArgs;
             nixos-test-user-firewall-iptables = self.clanLib.test.containerTest ./user-firewall/iptables.nix nixosTestArgs;
             nixos-test-user-firewall-nftables = self.clanLib.test.containerTest ./user-firewall/nftables.nix nixosTestArgs;
             nixos-test-extra-python-packages = self.clanLib.test.containerTest ./test-extra-python-packages nixosTestArgs;

checks/flash/flake-module.nix

@@ -58,51 +58,53 @@
         pkgs.buildPackages.xorg.lndir
         pkgs.glibcLocales
         pkgs.kbd.out
-        self.nixosConfigurations."test-flash-machine-${pkgs.hostPlatform.system}".pkgs.perlPackages.ConfigIniFiles
+        self.nixosConfigurations."test-flash-machine-${pkgs.stdenv.hostPlatform.system}".pkgs.perlPackages.ConfigIniFiles
-        self.nixosConfigurations."test-flash-machine-${pkgs.hostPlatform.system}".pkgs.perlPackages.FileSlurp
+        self.nixosConfigurations."test-flash-machine-${pkgs.stdenv.hostPlatform.system}".pkgs.perlPackages.FileSlurp
         pkgs.bubblewrap
 
-        self.nixosConfigurations."test-flash-machine-${pkgs.hostPlatform.system}".config.system.build.toplevel
+        self.nixosConfigurations."test-flash-machine-${pkgs.stdenv.hostPlatform.system}".config.system.build.toplevel
-        self.nixosConfigurations."test-flash-machine-${pkgs.hostPlatform.system}".config.system.build.diskoScript
+        self.nixosConfigurations."test-flash-machine-${pkgs.stdenv.hostPlatform.system}".config.system.build.diskoScript
-        self.nixosConfigurations."test-flash-machine-${pkgs.hostPlatform.system}".config.system.build.diskoScript.drvPath
+        self.nixosConfigurations."test-flash-machine-${pkgs.stdenv.hostPlatform.system}".config.system.build.diskoScript.drvPath
       ]
       ++ builtins.map (i: i.outPath) (builtins.attrValues self.inputs);
       closureInfo = pkgs.closureInfo { rootPaths = dependencies; };
     in
     {
       # Skip flash test on aarch64-linux for now as it's too slow
-      checks = lib.optionalAttrs (pkgs.stdenv.isLinux && pkgs.hostPlatform.system != "aarch64-linux") {
+      checks =
-        nixos-test-flash = self.clanLib.test.baseTest {
+        lib.optionalAttrs (pkgs.stdenv.isLinux && pkgs.stdenv.hostPlatform.system != "aarch64-linux")
-          name = "flash";
+          {
-          nodes.target = {
+            nixos-test-flash = self.clanLib.test.baseTest {
-            virtualisation.emptyDiskImages = [ 4096 ];
+              name = "flash";
-            virtualisation.memorySize = 4096;
+              nodes.target = {
+                virtualisation.emptyDiskImages = [ 4096 ];
+                virtualisation.memorySize = 4096;
 
-            virtualisation.useNixStoreImage = true;
+                virtualisation.useNixStoreImage = true;
-            virtualisation.writableStore = true;
+                virtualisation.writableStore = true;
 
-            environment.systemPackages = [ self.packages.${pkgs.system}.clan-cli ];
+                environment.systemPackages = [ self.packages.${pkgs.system}.clan-cli ];
-            environment.etc."install-closure".source = "${closureInfo}/store-paths";
+                environment.etc."install-closure".source = "${closureInfo}/store-paths";
 
-            nix.settings = {
+                nix.settings = {
-              substituters = lib.mkForce [ ];
+                  substituters = lib.mkForce [ ];
-              hashed-mirrors = null;
+                  hashed-mirrors = null;
-              connect-timeout = lib.mkForce 3;
+                  connect-timeout = lib.mkForce 3;
-              flake-registry = "";
+                  flake-registry = "";
-              experimental-features = [
+                  experimental-features = [
-                "nix-command"
+                    "nix-command"
-                "flakes"
+                    "flakes"
-              ];
+                  ];
-            };
+                };
+              };
+              testScript = ''
+                start_all()
+                machine.succeed("echo 'ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIRWUusawhlIorx7VFeQJHmMkhl9X3QpnvOdhnV/bQNG root@target' > ./test_id_ed25519.pub")
+                # Some distros like to automount disks with spaces
+                machine.succeed('mkdir -p "/mnt/with spaces" && mkfs.ext4 /dev/vdc && mount /dev/vdc "/mnt/with spaces"')
+                machine.succeed("clan flash write --ssh-pubkey ./test_id_ed25519.pub --keymap de --language de_DE.UTF-8 --debug --flake ${self.checks.x86_64-linux.clan-core-for-checks} --yes --disk main /dev/vdc test-flash-machine-${pkgs.stdenv.hostPlatform.system}")
+              '';
+            } { inherit pkgs self; };
           };
-          testScript = ''
-            start_all()
-            machine.succeed("echo 'ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIRWUusawhlIorx7VFeQJHmMkhl9X3QpnvOdhnV/bQNG root@target' > ./test_id_ed25519.pub")
-            # Some distros like to automount disks with spaces
-            machine.succeed('mkdir -p "/mnt/with spaces" && mkfs.ext4 /dev/vdc && mount /dev/vdc "/mnt/with spaces"')
-            machine.succeed("clan flash write --ssh-pubkey ./test_id_ed25519.pub --keymap de --language de_DE.UTF-8 --debug --flake ${self.checks.x86_64-linux.clan-core-for-checks} --yes --disk main /dev/vdc test-flash-machine-${pkgs.hostPlatform.system}")
-          '';
-        } { inherit pkgs self; };
-      };
     };
 }

checks/installation/flake-module.nix

@@ -160,9 +160,9 @@
           closureInfo = pkgs.closureInfo {
             rootPaths = [
               privateInputs.clan-core-for-checks
-              self.nixosConfigurations."test-install-machine-${pkgs.hostPlatform.system}".config.system.build.toplevel
+              self.nixosConfigurations."test-install-machine-${pkgs.stdenv.hostPlatform.system}".config.system.build.toplevel
-              self.nixosConfigurations."test-install-machine-${pkgs.hostPlatform.system}".config.system.build.initialRamdisk
+              self.nixosConfigurations."test-install-machine-${pkgs.stdenv.hostPlatform.system}".config.system.build.initialRamdisk
-              self.nixosConfigurations."test-install-machine-${pkgs.hostPlatform.system}".config.system.build.diskoScript
+              self.nixosConfigurations."test-install-machine-${pkgs.stdenv.hostPlatform.system}".config.system.build.diskoScript
               pkgs.stdenv.drvPath
               pkgs.bash.drvPath
               pkgs.buildPackages.xorg.lndir
@@ -215,7 +215,7 @@
                   # Prepare test flake and Nix store
                   flake_dir = prepare_test_flake(
                       temp_dir,
-                      "${self.checks.${pkgs.hostPlatform.system}.clan-core-for-checks}",
+                      "${self.checks.${pkgs.stdenv.hostPlatform.system}.clan-core-for-checks}",
                       "${closureInfo}"
                   )
 
@@ -296,7 +296,7 @@
                   # Prepare test flake and Nix store
                   flake_dir = prepare_test_flake(
                       temp_dir,
-                      "${self.checks.${pkgs.hostPlatform.system}.clan-core-for-checks}",
+                      "${self.checks.${pkgs.stdenv.hostPlatform.system}.clan-core-for-checks}",
                       "${closureInfo}"
                   )
 

checks/llm/default.nix

@@ -0,0 +1,82 @@
+{ self, pkgs, ... }:
+
+let
+
+  cli = self.packages.${pkgs.stdenv.hostPlatform.system}.clan-cli-full;
+
+  ollama-model = pkgs.callPackage ./qwen3-4b-instruct.nix { };
+in
+{
+  name = "llm";
+
+  nodes = {
+    peer1 =
+      { pkgs, ... }:
+      {
+
+        users.users.text-user = {
+          isNormalUser = true;
+          linger = true;
+          uid = 1000;
+          extraGroups = [ "systemd-journal" ];
+        };
+
+        # Set environment variables for user systemd
+        environment.extraInit = ''
+          if [ "$(id -u)" = "1000" ]; then
+            export XDG_RUNTIME_DIR="/run/user/1000"
+            export DBUS_SESSION_BUS_ADDRESS="unix:path=/run/user/1000/bus"
+
+            ollama_dir="$HOME/.ollama"
+            mkdir -p "$ollama_dir"
+            ln -sf ${ollama-model}/models "$ollama_dir"/models
+          fi
+        '';
+
+        # Enable PAM for user systemd sessions
+        security.pam.services.systemd-user = {
+          startSession = true;
+          # Workaround for containers - use pam_permit to avoid helper binary issues
+          text = pkgs.lib.mkForce ''
+            account required pam_permit.so
+            session required pam_permit.so
+            session required pam_env.so conffile=/etc/pam/environment readenv=0
+            session required ${pkgs.systemd}/lib/security/pam_systemd.so
+          '';
+        };
+
+        environment.systemPackages = [
+          cli
+          pkgs.ollama
+          (cli.pythonRuntime.withPackages (
+            ps: with ps; [
+              pytest
+              pytest-xdist
+              (cli.pythonRuntime.pkgs.toPythonModule cli)
+              self.legacyPackages.${pkgs.stdenv.hostPlatform.system}.nixosTestLib
+            ]
+          ))
+        ];
+      };
+  };
+
+  testScript =
+    { ... }:
+    ''
+      start_all()
+
+      peer1.wait_for_unit("multi-user.target")
+      peer1.wait_for_unit("user@1000.service")
+
+      # Fix user journal permissions so text-user can read their own logs
+      peer1.succeed("chown text-user:systemd-journal /var/log/journal/*/user-1000.journal*")
+      peer1.succeed("chmod 640 /var/log/journal/*/user-1000.journal*")
+      # the -o adopts="" is needed to overwrite any args coming from pyproject.toml
+      # -p no:cacheprovider disables pytest's cacheprovider which tries to write to the nix store in this case
+      cmd = "su - text-user -c 'pytest -s -n0 -m service_runner -p no:cacheprovider -o addopts="" ${cli.passthru.sourceWithTests}/clan_lib/llm'"
+      print("Running tests with command: " + cmd)
+
+      # Run tests as text-user (environment variables are set automatically)
+      peer1.succeed(cmd)
+    '';
+}

checks/llm/qwen3-4b-instruct.nix

@@ -0,0 +1,70 @@
+{ pkgs }:
+
+let
+  # Got them from https://github.com/Gholamrezadar/ollama-direct-downloader
+
+  # Download manifest
+  manifest = pkgs.fetchurl {
+    url = "https://registry.ollama.ai/v2/library/qwen3/manifests/4b-instruct";
+    # You'll need to calculate this hash - run the derivation once and it will tell you the correct hash
+    hash = "sha256-Dtze80WT6sGqK+nH0GxDLc+BlFrcpeyi8nZiwY8Wi6A=";
+  };
+
+  # Download blobs
+  blob1 = pkgs.fetchurl {
+    url = "https://registry.ollama.ai/v2/library/qwen3/blobs/sha256:b72accf9724e93698c57cbd3b1af2d3341b3d05ec2089d86d273d97964853cd2";
+    hash = "sha256-tyrM+XJOk2mMV8vTsa8tM0Gz0F7CCJ2G0nPZeWSFPNI=";
+  };
+
+  blob2 = pkgs.fetchurl {
+    url = "https://registry.ollama.ai/v2/library/qwen3/blobs/sha256:85e4a5b7b8ef0e48af0e8658f5aaab9c2324c76c1641493f4d1e25fce54b18b9";
+    hash = "sha256-heSlt7jvDkivDoZY9aqrnCMkx2wWQUk/TR4l/OVLGLk=";
+  };
+
+  blob3 = pkgs.fetchurl {
+    url = "https://registry.ollama.ai/v2/library/qwen3/blobs/sha256:eade0a07cac7712787bbce23d12f9306adb4781d873d1df6e16f7840fa37afec";
+    hash = "sha256-6t4KB8rHcSeHu84j0S+TBq20eB2HPR324W94QPo3r+w=";
+  };
+
+  blob4 = pkgs.fetchurl {
+    url = "https://registry.ollama.ai/v2/library/qwen3/blobs/sha256:d18a5cc71b84bc4af394a31116bd3932b42241de70c77d2b76d69a314ec8aa12";
+    hash = "sha256-0YpcxxuEvErzlKMRFr05MrQiQd5wx30rdtaaMU7IqhI=";
+  };
+
+  blob5 = pkgs.fetchurl {
+    url = "https://registry.ollama.ai/v2/library/qwen3/blobs/sha256:0914c7781e001948488d937994217538375b4fd8c1466c5e7a625221abd3ea7a";
+    hash = "sha256-CRTHeB4AGUhIjZN5lCF1ODdbT9jBRmxeemJSIavT6no=";
+  };
+in
+pkgs.stdenv.mkDerivation {
+  pname = "ollama-qwen3-4b-instruct";
+  version = "1.0";
+
+  dontUnpack = true;
+
+  buildPhase = ''
+    mkdir -p $out/models/manifests/registry.ollama.ai/library/qwen3
+    mkdir -p $out/models/blobs
+
+    # Copy manifest
+    cp ${manifest} $out/models/manifests/registry.ollama.ai/library/qwen3/4b-instruct
+
+    # Copy blobs with correct names
+    cp ${blob1} $out/models/blobs/sha256-b72accf9724e93698c57cbd3b1af2d3341b3d05ec2089d86d273d97964853cd2
+    cp ${blob2} $out/models/blobs/sha256-85e4a5b7b8ef0e48af0e8658f5aaab9c2324c76c1641493f4d1e25fce54b18b9
+    cp ${blob3} $out/models/blobs/sha256-eade0a07cac7712787bbce23d12f9306adb4781d873d1df6e16f7840fa37afec
+    cp ${blob4} $out/models/blobs/sha256-d18a5cc71b84bc4af394a31116bd3932b42241de70c77d2b76d69a314ec8aa12
+    cp ${blob5} $out/models/blobs/sha256-0914c7781e001948488d937994217538375b4fd8c1466c5e7a625221abd3ea7a
+  '';
+
+  installPhase = ''
+    # buildPhase already created everything in $out
+    :
+  '';
+
+  meta = with pkgs.lib; {
+    description = "Qwen3 4B Instruct model for Ollama";
+    license = "apache-2.0";
+    platforms = platforms.all;
+  };
+}

checks/systemd-abstraction/default.nix

@@ -2,7 +2,7 @@
 
 let
 
-  cli = self.packages.${pkgs.hostPlatform.system}.clan-cli-full;
+  cli = self.packages.${pkgs.stdenv.hostPlatform.system}.clan-cli-full;
 in
 {
   name = "systemd-abstraction";
@@ -62,6 +62,6 @@ in
       peer1.succeed("chmod 640 /var/log/journal/*/user-1000.journal*")
 
       # Run tests as text-user (environment variables are set automatically)
-      peer1.succeed("su - text-user -c 'pytest -s -n0 ${cli}/${cli.pythonRuntime.sitePackages}/clan_lib/service_runner'")
+      peer1.succeed("su - text-user -c 'pytest -p no:cacheprovider -o addopts="" -s -n0 ${cli.passthru.sourceWithTests}/clan_lib/service_runner'")
     '';
 }

checks/update/flake-module.nix

@@ -115,9 +115,9 @@
               let
                 closureInfo = pkgs.closureInfo {
                   rootPaths = [
-                    self.packages.${pkgs.hostPlatform.system}.clan-cli
+                    self.packages.${pkgs.stdenv.hostPlatform.system}.clan-cli
-                    self.checks.${pkgs.hostPlatform.system}.clan-core-for-checks
+                    self.checks.${pkgs.stdenv.hostPlatform.system}.clan-core-for-checks
-                    self.clanInternals.machines.${pkgs.hostPlatform.system}.test-update-machine.config.system.build.toplevel
+                    self.clanInternals.machines.${pkgs.stdenv.hostPlatform.system}.test-update-machine.config.system.build.toplevel
                     pkgs.stdenv.drvPath
                     pkgs.bash.drvPath
                     pkgs.buildPackages.xorg.lndir
@@ -132,7 +132,7 @@
                   imports = [ self.nixosModules.test-update-machine ];
                 };
                 extraPythonPackages = _p: [
-                  self.legacyPackages.${pkgs.hostPlatform.system}.nixosTestLib
+                  self.legacyPackages.${pkgs.stdenv.hostPlatform.system}.nixosTestLib
                 ];
 
                 testScript = ''
@@ -154,7 +154,7 @@
                       # Prepare test flake and Nix store
                       flake_dir = prepare_test_flake(
                           temp_dir,
-                          "${self.checks.${pkgs.hostPlatform.system}.clan-core-for-checks}",
+                          "${self.checks.${pkgs.stdenv.hostPlatform.system}.clan-core-for-checks}",
                           "${closureInfo}"
                       )
                       (flake_dir / ".clan-flake").write_text("")  # Ensure .clan-flake exists
@@ -226,7 +226,7 @@
                             "--to",
                             "ssh://root@192.168.1.1",
                             "--no-check-sigs",
-                            f"${self.packages.${pkgs.hostPlatform.system}.clan-cli}",
+                            f"${self.packages.${pkgs.stdenv.hostPlatform.system}.clan-cli}",
                             "--extra-experimental-features", "nix-command flakes",
                         ],
                         check=True,
@@ -242,7 +242,7 @@
                           "-o", "UserKnownHostsFile=/dev/null",
                           "-o", "StrictHostKeyChecking=no",
                           f"root@192.168.1.1",
-                          "${self.packages.${pkgs.hostPlatform.system}.clan-cli}/bin/clan",
+                          "${self.packages.${pkgs.stdenv.hostPlatform.system}.clan-cli}/bin/clan",
                           "machines",
                           "update",
                           "--debug",
@@ -270,7 +270,7 @@
 
                       # Run clan update command
                       subprocess.run([
-                          "${self.packages.${pkgs.hostPlatform.system}.clan-cli-full}/bin/clan",
+                          "${self.packages.${pkgs.stdenv.hostPlatform.system}.clan-cli-full}/bin/clan",
                           "machines",
                           "update",
                           "--debug",
@@ -297,7 +297,7 @@
 
                       # Run clan update command with --build-host
                       subprocess.run([
-                          "${self.packages.${pkgs.hostPlatform.system}.clan-cli-full}/bin/clan",
+                          "${self.packages.${pkgs.stdenv.hostPlatform.system}.clan-cli-full}/bin/clan",
                           "machines",
                           "update",
                           "--debug",

clanServices/certificates/README.md

@@ -1,3 +1,6 @@
+!!! Danger "Experimental"
+    This service is experimental and will change in the future.
+
 This service sets up a certificate authority (CA) that can issue certificates to
 other machines in your clan. For this the `ca` role is used.
 It additionally provides a `default` role, that can be applied to all machines

clanServices/coredns/README.md

@@ -1,3 +1,6 @@
+!!! Danger "Experimental"
+    This service is experimental and will change in the future.
+
 This module enables hosting clan-internal services easily, which can be resolved
 inside your VPN. This allows defining a custom top-level domain (e.g. `.clan`)
 and exposing endpoints from a machine to others, which will be

clanServices/data-mesher/default.nix

@@ -1,4 +1,7 @@
-{ ... }:
+{
+  clanLib,
+  ...
+}:
 let
   sharedInterface =
     { lib, ... }:
@@ -51,15 +54,15 @@ let
       builtins.foldl' (
         urls: name:
         let
-          ipPath = "${config.clan.core.settings.directory}/vars/per-machine/${name}/zerotier/zerotier-ip/value";
+          ip = clanLib.vars.getPublicValue {
+            flake = config.clan.core.settings.directory;
+            machine = name;
+            generator = "zerotier";
+            file = "zerotier-ip";
+            default = null;
+          };
         in
-        if builtins.pathExists ipPath then
+        if ip != null then urls ++ [ "[${ip}]:${builtins.toString settings.network.port}" ] else urls
-          let
-            ip = builtins.readFile ipPath;
-          in
-          urls ++ [ "[${ip}]:${builtins.toString settings.network.port}" ]
-        else
-          urls
       ) [ ] (builtins.attrNames ((roles.admin.machines or { }) // (roles.signer.machines or { })))
     );
 
@@ -156,9 +159,14 @@ in
                   readHostKey =
                     machine:
                     let
-                      path = "${config.clan.core.settings.directory}/vars/per-machine/${machine}/data-mesher-host-key/public_key/value";
+                      publicKey = clanLib.vars.getPublicValue {
+                        flake = config.clan.core.settings.directory;
+                        inherit machine;
+                        generator = "data-mesher-host-key";
+                        file = "public_key";
+                      };
                     in
-                    builtins.elemAt (lib.splitString "\n" (builtins.readFile path)) 1;
+                    builtins.elemAt (lib.splitString "\n" publicKey) 1;
                 in
                 {
                   enable = true;

clanServices/hello-world/README.md

@@ -1 +1,83 @@
-This a test README just to appease the eval warnings if we don't have one
+!!! Danger "Experimental"
+    This service is for demonstration purpose only and may change in the future.
+
+The Hello-World Clan Service is a minimal example showing how to build and register your own service.
+
+It serves as a reference implementation and is used in clan-core CI tests to ensure compatibility.
+
+## What it demonstrates
+
+- How to define a basic Clan-compatible service.
+- How to structure your service for discovery and configuration.
+- How Clan services interact with nixos.
+
+## Testing
+
+This service demonstrates two levels of testing to ensure quality and stability across releases:
+
+1. **Unit & Integration Testing** — via [`nix-unit`](https://github.com/nix-community/nix-unit)
+2. **End-to-End Testing** — via **NixOS VM tests**, which we extended to support **container virtualization** for better performance.
+
+We highly advocate following the [Practical Testing Pyramid](https://martinfowler.com/articles/practical-test-pyramid.html):
+
+* Write **unit tests** for core logic and invariants.
+* Add **one or two end-to-end (E2E)** tests to confirm your service starts and behaves correctly in a real NixOS environment.
+
+NixOS is **untyped** and frequently changes; tests are the safest way to ensure long-term stability of services.
+
+```
+               / \
+              /   \
+             / E2E \
+            /-------\
+           /         \
+          /Integration\
+         /-------------\
+        /               \
+       /    Unit Tests   \
+       -------------------
+```
+
+### nix-unit
+
+We highly advocate the usage of
+
+[nix-unit](https://github.com/nix-community/nix-unit)
+
+Example in: tests/eval-tests.nix
+
+If you use flake-parts you can use the [native integration](https://flake.parts/options/nix-unit.html)
+
+If nix-unit succeeds you'r nixos evaluation should be mostly correct.
+
+!!! Tip
+    - Ensure most used 'settings' and variants are tested.
+    - Think about some important edge-cases your system should handle.
+
+### NixOS VM / Container Test
+
+!!! Warning "Early Vars & clanTest"
+    The testing system around vars is experimental
+
+    `clanTest` is still experimental and enables container virtualization by default.
+    This is still early and might have some limitations.
+
+Some minimal boilerplate is needed to use `clanTest`
+
+```nix
+nixosLib = import (inputs.nixpkgs + "/nixos/lib") { }
+nixosLib.runTest (
+    { ... }:
+    {
+        imports = [
+            self.modules.nixosTest.clanTest
+            # Example in tests/vm/default.nix
+            testModule
+        ];
+        hostPkgs = pkgs;
+
+        # Uncomment if you don't want or cannot use containers
+        # test.useContainers = false;
+    }
+)
+```

clanServices/hello-world/default.nix

@@ -8,7 +8,7 @@
 {
   _class = "clan.service";
   manifest.name = "clan-core/hello-word";
-  manifest.description = "This is a test";
+  manifest.description = "Minimal example clan service that greets the world";
   manifest.readme = builtins.readFile ./README.md;
 
   # This service provides two roles: "morning" and "evening". Roles can be

clanServices/hello-world/flake-module.nix

@@ -26,7 +26,7 @@ in
             # The hello-world service being tested
             ../../clanServices/hello-world
             # Required modules
-            ../../nixosModules/clanCore
+            ../../nixosModules
           ];
           testName = "hello-world";
           tests = ./tests/eval-tests.nix;

clanServices/hello-world/tests/eval-tests.nix

@@ -4,7 +4,7 @@
   ...
 }:
 let
-  testFlake = clanLib.clan {
+  testClan = clanLib.clan {
     self = { };
     # Point to the folder of the module
     # TODO: make this optional
@@ -33,10 +33,20 @@ let
   };
 in
 {
-  test_simple = {
+  /**
-    config = testFlake.config;
+    We highly advocate the usage of:
+    https://github.com/nix-community/nix-unit
 
-    expr = { };
+    If you use flake-parts you can use the native integration: https://flake.parts/options/nix-unit.html
-    expected = { };
+  */
+  test_simple = {
+    # Allows inspection via the nix-repl
+    # Ignored by nix-unit; it only looks at 'expr' and 'expected'
+    inherit testClan;
+
+    # Assert that jon has the
+    # configured greeting in 'environment.etc.hello.text'
+    expr = testClan.config.nixosConfigurations.jon.config.environment.etc."hello".text;
+    expected = "Good evening World!";
   };
 }

clanServices/internet/README.md

@@ -1,8 +1,5 @@
-🚧🚧🚧 Experimental 🚧🚧🚧
+!!! Danger "Experimental"
-
+    This service is experimental and will change in the future.
-Use at your own risk.
-
-We are still refining its interfaces, instability and breakages are expected.
 
 ---
 

clanServices/internet/default.nix

@@ -16,6 +16,7 @@
         options = {
           host = lib.mkOption {
             type = lib.types.str;
+            default = "";
             description = ''
               ip address or hostname (domain) of the machine
             '';

clanServices/monitoring/README.md

@@ -1,3 +1,6 @@
+!!! Danger "Experimental"
+    This service is experimental and will change in the future.
+
 ## Usage
 
 ```

clanServices/monitoring/telegraf.nix

@@ -44,8 +44,10 @@
               pkgs.openssl
             ];
 
+            # TODO: Implement automated certificate rotation instead of using a 100-year expiration
             script = ''
               openssl req -x509 -nodes -newkey rsa:4096 \
+                -days 36500 \
                 -keyout "$out"/key \
                 -out "$out"/crt \
                 -subj "/C=US/ST=CA/L=San Francisco/O=Example Corp/OU=IT/CN=example.com"

clanServices/monitoring/tests/vm/vars/per-machine/peer1/telegraf-certs/crt/value

@@ -1,33 +1,33 @@
 -----BEGIN CERTIFICATE-----
-MIIFuTCCA6GgAwIBAgIUMXnA00bMrYvYSq0PjU5/HhXTpmcwDQYJKoZIhvcNAQEL
+MIIFuzCCA6OgAwIBAgIUNV3+MOkEcQinHmoFprxZfyR6TF4wDQYJKoZIhvcNAQEL
 BQAwbDELMAkGA1UEBhMCVVMxCzAJBgNVBAgMAkNBMRYwFAYDVQQHDA1TYW4gRnJh
 bmNpc2NvMRUwEwYDVQQKDAxFeGFtcGxlIENvcnAxCzAJBgNVBAsMAklUMRQwEgYD
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-MGwxCzAJBgNVBAYTAlVTMQswCQYDVQQIDAJDQTEWMBQGA1UEBwwNU2FuIEZyYW5j
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-aXNjbzEVMBMGA1UECgwMRXhhbXBsZSBDb3JwMQswCQYDVQQLDAJJVDEUMBIGA1UE
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-AwwLZXhhbXBsZS5jb20wggIiMA0GCSqGSIb3DQEBAQUAA4ICDwAwggIKAoICAQC7
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-sdy27E/XMAyKrgeFcXY70R/vX0gx6EcZlWGp2vZSUVAfW1ni/Vq/LVC02sxGEGwv
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-10+42yP2yghi89doKo8oCoLsbVu+Pi+TmRsgAijy4jN8pHqbn9/Vk8M8utLa1u4z
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-k1PNWTkgLsXO8DNkCudxcvPElXfmaw6zwaLrZys=
+D1hOs4gOQ853+83L/Ej4ESTj0B04NLVMlzMGtl3qcA==
 -----END CERTIFICATE-----

clanServices/monitoring/tests/vm/vars/per-machine/peer1/telegraf-certs/key/secret

@@ -1,19 +1,18 @@
 {
-	"data": "ENC[AES256_GCM,data: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,iv:q3j8EAokyyxiszf+wyRqxEr2igaD1bX7YnFx/NbsGg8=,tag:HKKYWRJEUwW2/TxL+5dSng==,type:str]",
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-		"lastmodified": "2025-09-18T14:33:37Z",
+		"lastmodified": "2025-10-21T13:17:17Z",
-		"mac": "ENC[AES256_GCM,data:XKCnd0QrAlOCECSeSvbLYHMLbmUh4fMRnLaTb5ARoP4Zc9joWGsCaRZxokc2/sG4BXA/6pkbQXHyIOudKbcBpVjjvs9E+6Mnzt53nfRoH/iOkYPbN2EO49okVZJXW0M1rlBxrxvGuiDlz2p2p6L7neKLy4EB482pYea5+dUr2Yw=,iv:oj/MkZCfkvCmAb79uzEvKwEAm1bKtWhS4rPRAWSgRgw=,tag:h5TPPILXkhJplnDT2Gqtfw==,type:str]",
+		"mac": "ENC[AES256_GCM,data:wdAFURkJZvclbz3UFPSPV9fma7zrZVEhMhsRqylGQMLepX/WohEAr8nJgeHl05be1Q8M8biPXCCoL0vfwg4BRZOkhD8PusJh8iBI3+STNQe/S1qoIK1ByfBFhJD+tIsVsgduLp6G32e6SRNvkuX3UpJqyViuRUavfQd3b8LRU4I=,iv:S3sMNTz5Kg4TxHj1tnk/ayiFuO74dR4aPnnomtkGByo=,tag:uive2bYe42s6VtPd03jTMw==,type:str]",
-		"unencrypted_suffix": "_unencrypted",
+		"version": "3.11.0"
-		"version": "3.10.2"
 	}
 }

clanServices/sshd/default.nix

@@ -29,7 +29,7 @@
       };
 
     perInstance =
-      { settings, ... }:
+      { settings, roles, ... }:
       {
         nixosModule =
           {
@@ -38,8 +38,19 @@
             pkgs,
             ...
           }:
+          let
+            uniqueStrings = list: builtins.attrNames (builtins.groupBy lib.id list);
+            # Collect searchDomains from all servers in this instance
+            allServerSearchDomains = lib.flatten (
+              lib.mapAttrsToList (_name: machineConfig: machineConfig.settings.certificate.searchDomains or [ ]) (
+                roles.server.machines or { }
+              )
+            );
+            # Merge client's searchDomains with all servers' searchDomains
+            searchDomains = uniqueStrings (settings.certificate.searchDomains ++ allServerSearchDomains);
+          in
           {
-            clan.core.vars.generators.openssh-ca = lib.mkIf (settings.certificate.searchDomains != [ ]) {
+            clan.core.vars.generators.openssh-ca = lib.mkIf (searchDomains != [ ]) {
               share = true;
               files.id_ed25519.deploy = false;
               files."id_ed25519.pub" = {
@@ -54,9 +65,9 @@
               '';
             };
 
-            programs.ssh.knownHosts.ssh-ca = lib.mkIf (settings.certificate.searchDomains != [ ]) {
+            programs.ssh.knownHosts.ssh-ca = lib.mkIf (searchDomains != [ ]) {
               certAuthority = true;
-              extraHostNames = builtins.map (domain: "*.${domain}") settings.certificate.searchDomains;
+              extraHostNames = builtins.map (domain: "*.${domain}") searchDomains;
               publicKey = config.clan.core.vars.generators.openssh-ca.files."id_ed25519.pub".value;
             };
           };

clanServices/syncthing/flake-module.nix

@@ -22,6 +22,7 @@ in
             ../../clanServices/syncthing
             # Required modules
             ../../nixosModules/clanCore
+            ../../nixosModules/machineModules
             # Dependencies like clan-cli
             ../../pkgs/clan-cli
           ];

clanServices/tor/README.md

@@ -1,8 +1,5 @@
-🚧🚧🚧 Experimental 🚧🚧🚧
+!!! Danger "Experimental"
-
+    This service is experimental and will change in the future.
-Use at your own risk.
-
-We are still refining its interfaces, instability and breakages are expected.
 
 ---
 

clanServices/wifi/tests/eval-tests.nix

@@ -41,14 +41,14 @@ let
   # In this case it is 'self-zerotier-redux'
   # This is usually only used internally, but we can use it to test the evaluation of service module in isolation
   # evaluatedService =
-  #   testFlake.clanInternals.inventoryClass.distributedServices.importedModulesEvaluated.self-zerotier-redux.config;
+  #   testFlake.clanInternals.inventoryClass.distributedServices.servicesEval.config.mappedServices.self-zerotier-redux.config;
 in
 {
   test_simple = {
     inherit testFlake;
 
     expr =
-      testFlake.config.clan.clanInternals.inventoryClass.distributedServices.importedModulesEvaluated.self-wifi.config;
+      testFlake.config.clan.clanInternals.inventoryClass.distributedServices.servicesEval.config.mappedServices.self-wifi.config;
     expected = 1;
 
     # expr = {

clanServices/wireguard/default.nix

@@ -54,7 +54,10 @@
       - For other controllers: The controller's /56 subnet
 */
 
-{ ... }:
+{
+  clanLib,
+  ...
+}:
 let
   # Shared module for extraHosts configuration
   extraHostsModule =
@@ -74,10 +77,12 @@ let
           controllerHosts = lib.mapAttrsToList (
             name: _value:
             let
-              prefix = builtins.readFile (
+              prefix = clanLib.vars.getPublicValue {
-                config.clan.core.settings.directory
+                flake = config.clan.core.settings.directory;
-                + "/vars/per-machine/${name}/wireguard-network-${instanceName}/prefix/value"
+                machine = name;
-              );
+                generator = "wireguard-network-${instanceName}";
+                file = "prefix";
+              };
               # Controller IP is always ::1 in their subnet
               ip = prefix + "::1";
             in
@@ -88,20 +93,24 @@ let
           peerHosts = lib.mapAttrsToList (
             peerName: peerValue:
             let
-              peerSuffix = builtins.readFile (
+              peerSuffix = clanLib.vars.getPublicValue {
-                config.clan.core.settings.directory
+                flake = config.clan.core.settings.directory;
-                + "/vars/per-machine/${peerName}/wireguard-network-${instanceName}/suffix/value"
+                machine = peerName;
-              );
+                generator = "wireguard-network-${instanceName}";
+                file = "suffix";
+              };
               # Determine designated controller
               designatedController =
                 if (builtins.length (builtins.attrNames roles.controller.machines) == 1) then
                   (builtins.head (builtins.attrNames roles.controller.machines))
                 else
                   peerValue.settings.controller;
-              controllerPrefix = builtins.readFile (
+              controllerPrefix = clanLib.vars.getPublicValue {
-                config.clan.core.settings.directory
+                flake = config.clan.core.settings.directory;
-                + "/vars/per-machine/${designatedController}/wireguard-network-${instanceName}/prefix/value"
+                machine = designatedController;
-              );
+                generator = "wireguard-network-${instanceName}";
+                file = "prefix";
+              };
               peerIP = controllerPrefix + ":" + peerSuffix;
             in
             "${peerIP} ${peerName}.${domain}"
@@ -220,10 +229,12 @@ in
                 lib.mapAttrsToList (
                   ctrlName: _:
                   let
-                    controllerPrefix = builtins.readFile (
+                    controllerPrefix = clanLib.vars.getPublicValue {
-                      config.clan.core.settings.directory
+                      flake = config.clan.core.settings.directory;
-                      + "/vars/per-machine/${ctrlName}/wireguard-network-${instanceName}/prefix/value"
+                      machine = ctrlName;
-                    );
+                      generator = "wireguard-network-${instanceName}";
+                      file = "prefix";
+                    };
                     peerIP = controllerPrefix + ":" + peerSuffix;
                   in
                   "${peerIP}/56"
@@ -234,20 +245,22 @@ in
 
               # Connect to all controllers
               peers = lib.mapAttrsToList (name: value: {
-                publicKey = (
+                publicKey = clanLib.vars.getPublicValue {
-                  builtins.readFile (
+                  flake = config.clan.core.settings.directory;
-                    config.clan.core.settings.directory
+                  machine = name;
-                    + "/vars/per-machine/${name}/wireguard-keys-${instanceName}/publickey/value"
+                  generator = "wireguard-keys-${instanceName}";
-                  )
+                  file = "publickey";
-                );
+                };
 
                 # Allow each controller's /56 subnet
                 allowedIPs = [
                   "${
-                    builtins.readFile (
+                    clanLib.vars.getPublicValue {
-                      config.clan.core.settings.directory
+                      flake = config.clan.core.settings.directory;
-                      + "/vars/per-machine/${name}/wireguard-network-${instanceName}/prefix/value"
+                      machine = name;
-                    )
+                      generator = "wireguard-network-${instanceName}";
+                      file = "prefix";
+                    }
                   }::/56"
                 ];
 
@@ -349,25 +362,29 @@ in
                 if allPeers ? ${name} then
                   # For peers: they now have our entire /56 subnet
                   {
-                    publicKey = (
+                    publicKey = clanLib.vars.getPublicValue {
-                      builtins.readFile (
+                      flake = config.clan.core.settings.directory;
-                        config.clan.core.settings.directory
+                      machine = name;
-                        + "/vars/per-machine/${name}/wireguard-keys-${instanceName}/publickey/value"
+                      generator = "wireguard-keys-${instanceName}";
-                      )
+                      file = "publickey";
-                    );
+                    };
 
                     # Allow the peer's /96 range in ALL controller subnets
                     allowedIPs = lib.mapAttrsToList (
                       ctrlName: _:
                       let
-                        controllerPrefix = builtins.readFile (
+                        controllerPrefix = clanLib.vars.getPublicValue {
-                          config.clan.core.settings.directory
+                          flake = config.clan.core.settings.directory;
-                          + "/vars/per-machine/${ctrlName}/wireguard-network-${instanceName}/prefix/value"
+                          machine = ctrlName;
-                        );
+                          generator = "wireguard-network-${instanceName}";
-                        peerSuffix = builtins.readFile (
+                          file = "prefix";
-                          config.clan.core.settings.directory
+                        };
-                          + "/vars/per-machine/${name}/wireguard-network-${instanceName}/suffix/value"
+                        peerSuffix = clanLib.vars.getPublicValue {
-                        );
+                          flake = config.clan.core.settings.directory;
+                          machine = name;
+                          generator = "wireguard-network-${instanceName}";
+                          file = "suffix";
+                        };
                       in
                       "${controllerPrefix}:${peerSuffix}/96"
                     ) roles.controller.machines;
@@ -377,19 +394,21 @@ in
                 else
                   # For other controllers: use their /56 subnet
                   {
-                    publicKey = (
+                    publicKey = clanLib.vars.getPublicValue {
-                      builtins.readFile (
+                      flake = config.clan.core.settings.directory;
-                        config.clan.core.settings.directory
+                      machine = name;
-                        + "/vars/per-machine/${name}/wireguard-keys-${instanceName}/publickey/value"
+                      generator = "wireguard-keys-${instanceName}";
-                      )
+                      file = "publickey";
-                    );
+                    };
 
                     allowedIPs = [
                       "${
-                        builtins.readFile (
+                        clanLib.vars.getPublicValue {
-                          config.clan.core.settings.directory
+                          flake = config.clan.core.settings.directory;
-                          + "/vars/per-machine/${name}/wireguard-network-${instanceName}/prefix/value"
+                          machine = name;
-                        )
+                          generator = "wireguard-network-${instanceName}";
+                          file = "prefix";
+                        }
                       }::/56"
                     ];
 

clanServices/yggdrasil/README.md

@@ -1,7 +1,20 @@
+!!! Danger "Experimental"
+    This service is experimental and will change in the future.
+
+---
+
 This module sets up [yggdrasil](https://yggdrasil-network.github.io/) across your clan.
 
-Yggdrasil is designed to be a future-proof and decentralised alternative to
+Yggdrasil is designed to be a future-proof and decentralised alternative to the
-the structured routing protocols commonly used today on the internet. Inside your clan, it will allow you to reach all of your machines.
+structured routing protocols commonly used today on the internet. Inside your
+clan, it will allow you to reach all of your machines.
+
+If you have other services in your inventory which export peers (e.g. the
+`internet` or the services) as [service
+exports](https://docs.clan.lol/reference/options/clan_service/#exports), they
+will be added as yggdrasil peers automatically. This allows using the stable
+yggdrasil IPv6 address to refer to other hosts and letting yggdrasil decide on
+the best routing based on available connections.
 
 ## Example Usage
 

clanServices/yggdrasil/default.nix

@@ -29,12 +29,13 @@
           ];
         };
 
-        options.peers = lib.mkOption {
+        options.extraPeers = lib.mkOption {
           type = lib.types.listOf lib.types.str;
           default = [ ];
           description = ''
-            Static peers to configure for this host.
+            Additional static peers to configure for this host. If you use a
-            If not set, local peers will be auto-discovered
+            VPN clan service, it will automatically be added as peers to other hosts.
+            Local peers are also auto-discovered and don't need to be added.
           '';
           example = [
             "tcp://192.168.1.1:6443"
@@ -45,16 +46,67 @@
         };
       };
     perInstance =
-      { settings, ... }:
+      {
+        settings,
+        roles,
+        exports,
+        ...
+      }:
       {
         nixosModule =
           {
             config,
             pkgs,
+            lib,
+            clan-core,
             ...
           }:
+          let
+
+            mkPeers = ip: [
+              # "tcp://${ip}:6443"
+              "quic://${ip}:6443"
+              "ws://${ip}:6443"
+              "tls://${ip}:6443"
+            ];
+
+            select' = clan-core.inputs.nix-select.lib.select;
+
+            # TODO make it nicer @lassulus, @picnoir wants microlens
+            # Get a list of all exported IPs from all VPN modules
+            exportedPeerIPs = builtins.foldl' (
+              acc: e:
+              if e == { } then
+                acc
+              else
+                acc ++ (lib.flatten (builtins.filter (s: s != "") (lib.attrValues (select' "peers.*.plain" e))))
+            ) [ ] (lib.attrValues (select' "instances.*.networking.?peers.*.host.?plain" exports));
+
+            # Construct a list of peers in yggdrasil format
+            exportedPeers = lib.flatten (map mkPeers exportedPeerIPs);
+
+          in
           {
 
+            # Set <yggdrasil ip> <hostname>.<tld> for all hosts.
+            # Networking modules will then add themselves as peers, so we can
+            # always use this to resolve a host via the best possible route,
+            # doing fail-over if needed.
+            networking.extraHosts = lib.strings.concatStringsSep "\n" (
+              lib.filter (n: n != "") (
+                map (
+                  name:
+                  let
+                    ipPath = "${config.clan.core.settings.directory}/vars/per-machine/${name}/yggdrasil/address/value";
+                  in
+                  if builtins.pathExists ipPath then
+                    "${builtins.readFile ipPath} ${name}.${config.clan.core.settings.tld}"
+                  else
+                    ""
+                ) (lib.attrNames roles.default.machines)
+              )
+            );
+
             clan.core.vars.generators.yggdrasil = {
 
               files.privateKey = { };
@@ -99,7 +151,7 @@
               settings = {
                 PrivateKeyPath = "/key";
                 IfName = "ygg";
-                Peers = settings.peers;
+                Peers = lib.lists.unique (exportedPeers ++ settings.extraPeers);
                 MulticastInterfaces = [
                   # Ethernet is preferred over WIFI
                   {

clanServices/yggdrasil/tests/vm/default.nix

@@ -17,6 +17,13 @@
         roles.default.machines.peer1 = { };
         roles.default.machines.peer2 = { };
       };
+
+      # Peers are set form exports of the internet service
+      instances."internet" = {
+        module.name = "internet";
+        roles.default.machines.peer1.settings.host = "peer1";
+        roles.default.machines.peer2.settings.host = "peer2";
+      };
     };
   };
 

clanServices/zerotier/default.nix

@@ -1,4 +1,7 @@
-{ ... }:
+{
+  clanLib,
+  ...
+}:
 {
   _class = "clan.service";
   manifest.name = "clan-core/zerotier";
@@ -39,6 +42,7 @@
             imports = [
               (import ./shared.nix {
                 inherit
+                  clanLib
                   instanceName
                   roles
                   config
@@ -90,6 +94,7 @@
             imports = [
               (import ./shared.nix {
                 inherit
+                  clanLib
                   instanceName
                   roles
                   config
@@ -142,6 +147,7 @@
             imports = [
               (import ./shared.nix {
                 inherit
+                  clanLib
                   instanceName
                   roles
                   config
@@ -160,15 +166,16 @@
                   );
                   networkIps = builtins.foldl' (
                     ips: name:
-                    if
+                    let
-                      builtins.pathExists "${config.clan.core.settings.directory}/vars/per-machine/${name}/zerotier/zerotier-ip/value"
+                      ztIp = clanLib.vars.getPublicValue {
-                    then
+                        flake = config.clan.core.settings.directory;
-                      ips
+                        machine = name;
-                      ++ [
+                        generator = "zerotier";
-                        (builtins.readFile "${config.clan.core.settings.directory}/vars/per-machine/${name}/zerotier/zerotier-ip/value")
+                        file = "zerotier-ip";
-                      ]
+                        default = null;
-                    else
+                      };
-                      ips
+                    in
+                    if ztIp != null then ips ++ [ ztIp ] else ips
                   ) [ ] machines;
                   allHostIPs = settings.allowedIps ++ networkIps;
                 in

clanServices/zerotier/flake-module.nix

@@ -21,6 +21,7 @@ in
             ../../clanServices/zerotier
             # Required modules
             ../../nixosModules/clanCore
+            ../../nixosModules/machineModules
             # Dependencies like clan-cli
             ../../pkgs/clan-cli
           ];

clanServices/zerotier/shared.nix

@@ -1,4 +1,5 @@
 {
+  clanLib,
   lib,
   config,
   pkgs,
@@ -8,20 +9,26 @@
 }:
 let
   controllerMachine = builtins.head (lib.attrNames roles.controller.machines or { });
-  networkIdPath = "${config.clan.core.settings.directory}/vars/per-machine/${controllerMachine}/zerotier/zerotier-network-id/value";
+  networkId = clanLib.vars.getPublicValue {
-  networkId = if builtins.pathExists networkIdPath then builtins.readFile networkIdPath else null;
+    flake = config.clan.core.settings.directory;
+    machine = controllerMachine;
+    generator = "zerotier";
+    file = "zerotier-network-id";
+    default = null;
+  };
   moons = lib.attrNames (roles.moon.machines or { });
   moonIps = builtins.foldl' (
     ips: name:
-    if
+    let
-      builtins.pathExists "${config.clan.core.settings.directory}/vars/per-machine/${name}/zerotier/zerotier-ip/value"
+      moonIp = clanLib.vars.getPublicValue {
-    then
+        flake = config.clan.core.settings.directory;
-      ips
+        machine = name;
-      ++ [
+        generator = "zerotier";
-        (builtins.readFile "${config.clan.core.settings.directory}/vars/per-machine/${name}/zerotier/zerotier-ip/value")
+        file = "zerotier-ip";
-      ]
+        default = null;
-    else
+      };
-      ips
+    in
+    if moonIp != null then ips ++ [ moonIp ] else ips
   ) [ ] moons;
 in
 {

devFlake/flake.lock

@@ -3,10 +3,10 @@
     "clan-core-for-checks": {
       "flake": false,
       "locked": {
-        "lastModified": 1760361585,
+        "lastModified": 1761204206,
-        "narHash": "sha256-v4PnSmt1hXW4dSgVWxcd1ZeEBlhO7NksNRC5cX7L5iw=",
+        "narHash": "sha256-A4KDudGblln1yh8c95OVow2NRlHtbGZXr/pgNenyrNc=",
         "ref": "main",
-        "rev": "7e7e58eb64ef61beb0a938a6622ec0122382131b",
+        "rev": "aabbe0dfac47b7cfbe2210bcb27fb7ecce93350f",
         "shallow": true,
         "type": "git",
         "url": "https://git.clan.lol/clan/clan-core"
@@ -105,11 +105,11 @@
     },
     "nixpkgs-dev": {
       "locked": {
-        "lastModified": 1760965023,
+        "lastModified": 1762168314,
-        "narHash": "sha256-cpcgkeLApMGFCdp4jFqeIxTwlcGaSI+Zwmv8z2E85pY=",
+        "narHash": "sha256-+DX6mIF47gRGoK0mqkTg1Jmcjcup0CAXJFHVkdUx8YA=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "40ef6b9aa73f70b265c29df083fafae66b9df351",
+        "rev": "94fc102d2c15d9c1a861e59de550807c65358e1b",
         "type": "github"
       },
       "original": {
@@ -128,11 +128,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1760652422,
+        "lastModified": 1761730856,
-        "narHash": "sha256-C88Pgz38QIl9JxQceexqL2G7sw9vodHWx1Uaq+NRJrw=",
+        "narHash": "sha256-t1i5p/vSWwueZSC0Z2BImxx3BjoUDNKyC2mk24krcMY=",
         "owner": "NuschtOS",
         "repo": "search",
-        "rev": "3ebeebe8b6a49dfb11f771f761e0310f7c48d726",
+        "rev": "e29de6db0cb3182e9aee75a3b1fd1919d995d85b",
         "type": "github"
       },
       "original": {
@@ -208,11 +208,11 @@
         "nixpkgs": []
       },
       "locked": {
-        "lastModified": 1760945191,
+        "lastModified": 1761311587,
-        "narHash": "sha256-ZRVs8UqikBa4Ki3X4KCnMBtBW0ux1DaT35tgsnB1jM4=",
+        "narHash": "sha256-Msq86cR5SjozQGCnC6H8C+0cD4rnx91BPltZ9KK613Y=",
         "owner": "numtide",
         "repo": "treefmt-nix",
-        "rev": "f56b1934f5f8fcab8deb5d38d42fd692632b47c2",
+        "rev": "2eddae033e4e74bf581c2d1dfa101f9033dbd2dc",
         "type": "github"
       },
       "original": {

docs/site/getting-started/convert-existing-NixOS-configuration.md

@@ -88,6 +88,7 @@ For the provide flake example, your flake should now look like this:
       self = self; # this needs to point at the repository root
       specialArgs = {};
       meta.name = throw "Change me to something unique";
+      meta.tld = throw "Change me to something unique";
 
       machines = {
         berlin = {

docs/site/getting-started/creating-your-first-clan.md

@@ -51,7 +51,7 @@ Make sure you have the following:
     **Note:** This creates a new directory in your current location
 
     ```shellSession
-    nix run https://git.clan.lol/clan/clan-core/archive/main.tar.gz#clan-cli --refresh -- flakes create
+    nix run "https://git.clan.lol/clan/clan-core/archive/main.tar.gz#clan-cli" --refresh -- flakes create
     ```
 
 3. Enter a **name** in the prompt:
@@ -137,12 +137,13 @@ Description: None
 
 This confirms your setup is working correctly.
 
-You can now change the default name by editing the `meta.name` field in your `clan.nix` file.
+You can now change the default name and tld by editing the `meta.name` and `meta.tld` fields in your `clan.nix` file.
 
-```{.nix title="clan.nix" hl_lines="3"}
+```{.nix title="clan.nix" hl_lines="3 4"}
 {
   # Ensure this is unique among all clans you want to use.
   meta.name = "__CHANGE_ME__";
+  meta.tld = "changeme";
 
   # ...
   # elided

docs/site/getting-started/update-machines.md

@@ -10,10 +10,11 @@ and how to define a remote builder for your machine closures.
 Set the machine’s `targetHost` to the reachable IP address of the new machine.
 This eliminates the need to specify `--target-host` in CLI commands.
 
-```{.nix title="clan.nix" hl_lines="9"}
+```{.nix title="clan.nix" hl_lines="10"}
 {
 # Ensure this is unique among all clans you want to use.
 meta.name = "my-clan";
+meta.tld = "ccc";
 
 inventory.machines = {
     # Define machines here.

docs/site/guides/contributing/testing.md

@@ -150,10 +150,61 @@ Those are very similar to NixOS VM tests, as in they run virtualized nixos machi
 As of now the container test driver is a downstream development in clan-core.
 Basically everything stated under the NixOS VM tests sections applies here, except some limitations.
 
-Limitations:
+### Using Container Tests vs VM Tests
 
-- Cannot run in interactive mode, however while the container test runs, it logs a nsenter command that can be used to log into each of the container.
+Container tests are **enabled by default** for all tests using the clan testing framework.
-- setuid binaries don't work
+They offer significant performance advantages over VM tests:
+
+- **Faster startup**
+- **Lower resource usage**: No full kernel boot or hardware emulation overhead
+
+To control whether a test uses containers or VMs, use the `clan.test.useContainers` option:
+
+```nix
+{
+  clan = {
+    directory = ./.;
+    test.useContainers = true;  # Use containers (default)
+    # test.useContainers = false;  # Use VMs instead
+  };
+}
+```
+
+**When to use VM tests instead of container tests:**
+
+- Testing kernel features, modules, or boot processes
+- Testing hardware-specific features
+- When you need full system isolation
+
+### System Requirements for Container Tests
+
+Container tests require the **`uid-range`** system feature** in the Nix sandbox.
+This feature allows Nix to allocate a range of UIDs for containers to use, enabling `systemd-nspawn` containers to run properly inside the Nix build sandbox.
+
+**Configuration:**
+
+The `uid-range` feature requires the `auto-allocate-uids` setting to be enabled in your Nix configuration.
+
+To verify or enable it, add to your `/etc/nix/nix.conf` or NixOS configuration:
+
+```nix
+settings.experimental-features = [
+    "auto-allocate-uids"
+];
+
+nix.settings.auto-allocate-uids = true;
+nix.settings.system-features = [ "uid-range" ];
+```
+
+**Technical details:**
+
+- Container tests set `requiredSystemFeatures = [ "uid-range" ];` in their derivation (see `lib/test/container-test-driver/driver-module.nix:98`)
+- Without this feature, containers cannot properly manage user namespaces and will fail to start
+
+### Limitations
+
+- Cannot run in interactive mode, however while the container test runs, it logs a nsenter command that can be used to log into each of the containers.
+- Early implementation and limited by features.
 
 ### Where to find examples for NixOS container tests
 

docs/site/guides/flake-parts.md

@@ -60,6 +60,7 @@ Configure Clan-wide settings and define machines. Here's an example `flake.nix`:
       # Define your Clan
       clan = {
         meta.name = ""; # Required and must be unique
+        meta.tld = ""; # Required and must be unique
 
         machines = {
           jon = {

docs/site/guides/networking/mesh-vpn.md

@@ -43,6 +43,7 @@ For the purpose of this guide we have two machines:
         inherit self;
 
         meta.name = "myclan";
+        meta.tld = "ccc";
 
         inventory.machines = {
           controller = {};

docs/site/guides/vars/sops/age-plugins.md

@@ -63,6 +63,7 @@ To use `age` plugins with Clan, you need to configure them in your `flake.nix` f
       inherit self;
 
       meta.name = "myclan";
+      meta.tld = "ccc";
 
       # Add YubiKey and FIDO2 HMAC plugins
       # Note: Plugins must be available in nixpkgs.

flake.lock

@@ -31,11 +31,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1760701190,
+        "lastModified": 1761899396,
-        "narHash": "sha256-y7UhnWlER8r776JsySqsbTUh2Txf7K30smfHlqdaIQw=",
+        "narHash": "sha256-XOpKBp6HLzzMCbzW50TEuXN35zN5WGQREC7n34DcNMM=",
         "owner": "nix-community",
         "repo": "disko",
-        "rev": "3a9450b26e69dcb6f8de6e2b07b3fc1c288d85f5",
+        "rev": "6f4cf5abbe318e4cd1e879506f6eeafd83f7b998",
         "type": "github"
       },
       "original": {
@@ -51,11 +51,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1760948891,
+        "lastModified": 1762040540,
-        "narHash": "sha256-TmWcdiUUaWk8J4lpjzu4gCGxWY6/Ok7mOK4fIFfBuU4=",
+        "narHash": "sha256-z5PlZ47j50VNF3R+IMS9LmzI5fYRGY/Z5O5tol1c9I4=",
         "owner": "hercules-ci",
         "repo": "flake-parts",
-        "rev": "864599284fc7c0ba6357ed89ed5e2cd5040f0c04",
+        "rev": "0010412d62a25d959151790968765a70c436598b",
         "type": "github"
       },
       "original": {
@@ -71,11 +71,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1760721282,
+        "lastModified": 1762039661,
-        "narHash": "sha256-aAHphQbU9t/b2RRy2Eb8oMv+I08isXv2KUGFAFn7nCo=",
+        "narHash": "sha256-oM5BwAGE78IBLZn+AqxwH/saqwq3e926rNq5HmOulkc=",
         "owner": "nix-darwin",
         "repo": "nix-darwin",
-        "rev": "c3211fcd0c56c11ff110d346d4487b18f7365168",
+        "rev": "c3c8c9f2a5ed43175ac4dc030308756620e6e4e4",
         "type": "github"
       },
       "original": {
@@ -99,11 +99,11 @@
     },
     "nixos-facter-modules": {
       "locked": {
-        "lastModified": 1756491981,
+        "lastModified": 1761137276,
-        "narHash": "sha256-lXyDAWPw/UngVtQfgQ8/nrubs2r+waGEYIba5UX62+k=",
+        "narHash": "sha256-4lDjGnWRBLwqKQ4UWSUq6Mvxu9r8DSqCCydodW/Jsi8=",
         "owner": "nix-community",
         "repo": "nixos-facter-modules",
-        "rev": "c1b29520945d3e148cd96618c8a0d1f850965d8c",
+        "rev": "70bcd64225d167c7af9b475c4df7b5abba5c7de8",
         "type": "github"
       },
       "original": {
@@ -115,10 +115,10 @@
     "nixpkgs": {
       "locked": {
         "lastModified": 315532800,
-        "narHash": "sha256-yDxtm0PESdgNetiJN5+MFxgubBcLDTiuSjjrJiyvsvM=",
+        "narHash": "sha256-LDT9wuUZtjPfmviCcVWif5+7j4kBI2mWaZwjNNeg4eg=",
-        "rev": "d7f52a7a640bc54c7bb414cca603835bf8dd4b10",
+        "rev": "a7fc11be66bdfb5cdde611ee5ce381c183da8386",
         "type": "tarball",
-        "url": "https://releases.nixos.org/nixpkgs/nixpkgs-25.11pre871443.d7f52a7a640b/nixexprs.tar.xz"
+        "url": "https://releases.nixos.org/nixpkgs/nixpkgs-25.11pre887438.a7fc11be66bd/nixexprs.tar.xz"
       },
       "original": {
         "type": "tarball",
@@ -146,11 +146,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1760845571,
+        "lastModified": 1760998189,
-        "narHash": "sha256-PwGzU3EOU65Ef1VvuNnVLie+l+P0g/fzf/PGUG82KbM=",
+        "narHash": "sha256-ee2e1/AeGL5X8oy/HXsZQvZnae6XfEVdstGopKucYLY=",
         "owner": "Mic92",
         "repo": "sops-nix",
-        "rev": "9c9a9798be331ed3f4b2902933d7677d0659ee61",
+        "rev": "5a7d18b5c55642df5c432aadb757140edfeb70b3",
         "type": "github"
       },
       "original": {
@@ -181,11 +181,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1760945191,
+        "lastModified": 1761311587,
-        "narHash": "sha256-ZRVs8UqikBa4Ki3X4KCnMBtBW0ux1DaT35tgsnB1jM4=",
+        "narHash": "sha256-Msq86cR5SjozQGCnC6H8C+0cD4rnx91BPltZ9KK613Y=",
         "owner": "numtide",
         "repo": "treefmt-nix",
-        "rev": "f56b1934f5f8fcab8deb5d38d42fd692632b47c2",
+        "rev": "2eddae033e4e74bf581c2d1dfa101f9033dbd2dc",
         "type": "github"
       },
       "original": {

flake.nix

@@ -68,6 +68,7 @@
       (
         { ... }:
         {
+          debug = true;
           clan = {
             meta.name = "clan-core";
             inventory = {
@@ -98,6 +99,7 @@
               ./lib/filter-clan-core/flake-module.nix
               ./lib/flake-module.nix
               ./lib/flake-parts/clan-nixos-test.nix
+              ./modules/flake-module.nix
               ./nixosModules/clanCore/vars/flake-module.nix
               ./nixosModules/flake-module.nix
               ./pkgs/clan-cli/clan_cli/tests/flake-module.nix

flakeModules/clan.nix

@@ -39,32 +39,10 @@ in
           };
           modules = [
             clan-core.modules.clan.default
-            {
-              checks.minNixpkgsVersion = {
-                assertion = lib.versionAtLeast nixpkgs.lib.version "25.11";
-                message = ''
-                  Nixpkgs version: ${nixpkgs.lib.version} is incompatible with clan-core. (>= 25.11 is recommended)
-                  ---
-                  Your version of 'nixpkgs' seems too old for clan-core.
-                  Please read: https://docs.clan.lol/guides/nixpkgs-flake-input
-
-                  You can ignore this check by setting:
-                  clan.checks.minNixpkgsVersion.ignore = true;
-                  ---
-                '';
-              };
-            }
           ];
         };
-        apply =
+        # Important: !This logic needs to be kept in sync with lib.clan function!
-          config:
+        apply = config: clan-core.lib.checkConfig config.checks config;
-          lib.deepSeq (lib.mapAttrs (
-            id: check:
-            if check.ignore || check.assertion then
-              null
-            else
-              throw "clan.checks.${id} failed with message\n${check.message}"
-          ) config.checks) config;
       };
 
     # Mapped flake toplevel outputs

lib/clan/checkConfig.nix

@@ -0,0 +1,19 @@
+{ lib, ... }:
+/**
+  Function to assert clan configuration checks.
+
+  Arguments:
+
+  - 'checks' attribute of clan configuration
+  - Any: the returned configuration (can be anything, is just passed through)
+*/
+checks:
+lib.deepSeq (
+  lib.mapAttrs (
+    id: check:
+    if check.ignore || check.assertion then
+      null
+    else
+      throw "clan.checks.${id} failed with message\n${check.message}"
+  ) checks
+)

lib/clan/default.nix

@@ -33,20 +33,23 @@
 let
   nixpkgs = self.inputs.nixpkgs or clan-core.inputs.nixpkgs;
   nix-darwin = self.inputs.nix-darwin or clan-core.inputs.nix-darwin;
+  configuration = (
+    lib.evalModules {
+      class = "clan";
+      specialArgs = {
+        inherit
+          self
+          ;
+        inherit
+          nixpkgs
+          nix-darwin
+          ;
+      };
+      modules = [
+        clan-core.modules.clan.default
+        m
+      ];
+    }
+  );
 in
-lib.evalModules {
+clan-core.clanLib.checkConfig configuration.config.checks configuration
-  class = "clan";
-  specialArgs = {
-    inherit
-      self
-      ;
-    inherit
-      nixpkgs
-      nix-darwin
-      ;
-  };
-  modules = [
-    clan-core.modules.clan.default
-    m
-  ];
-}

lib/clanTest/flake-module.nix

@@ -137,6 +137,12 @@ in
           default = { };
           type = types.submoduleWith {
             specialArgs = {
+              self = throw ''
+                'self' is banned in the use of clan.services
+                Use 'exports' instead: https://docs.clan.lol/reference/options/clan_service/#exports
+                ---
+                If you really need to used 'self' here, that makes the module less portable
+              '';
               inherit (config.clanSettings)
                 clan-core
                 nixpkgs

lib/default.nix

@@ -16,10 +16,12 @@ lib.fix (
       */
       callLib = file: args: import file ({ inherit lib clanLib; } // args);
 
-      evalService = clanLib.callLib ./modules/inventory/distributed-service/evalService.nix { };
+      checkConfig = clanLib.callLib ./clan/checkConfig.nix { };
+
+      evalService = clanLib.callLib ./evalService.nix { };
       # ------------------------------------
       # ClanLib functions
-      inventory = clanLib.callLib ./modules/inventory { };
+      inventory = clanLib.callLib ./inventory { };
       test = clanLib.callLib ./test { };
       flake-inputs = clanLib.callLib ./flake-inputs.nix { };
       # Custom types
@@ -30,6 +32,8 @@ lib.fix (
       jsonschema = import ./jsonschema { inherit lib; };
       docs = import ./docs.nix { inherit lib; };
 
+      vars = import ./vars.nix { inherit lib; };
+
       # flakes
       flakes = clanLib.callLib ./flakes.nix { };
 

lib/dir_test.nix

@@ -2,7 +2,7 @@
   lib ? import <nixpkgs/lib>,
 }:
 let
-  clanLibOrig = (import ./.. { inherit lib; }).__unfix__;
+  clanLibOrig = (import ./. { inherit lib; }).__unfix__;
   clanLibWithFs =
     { virtual_fs }:
     lib.fix (
@@ -11,19 +11,19 @@ let
         let
           clan-core = {
             clanLib = final;
-            modules.clan.default = lib.modules.importApply ./clan { inherit clan-core; };
+            modules.clan.default = lib.modules.importApply ../modules/clan { inherit clan-core; };
 
             # Note: Can add other things to "clan-core"
             # ... Not needed for this test
           };
         in
         {
-          clan = import ../clan {
+          clan = import ./clan {
             inherit lib clan-core;
           };
 
           # Override clanLib.fs for unit-testing against a virtual filesystem
-          fs = import ../clanTest/virtual-fs.nix { inherit lib; } {
+          fs = import ./clanTest/virtual-fs.nix { inherit lib; } {
             inherit rootPath virtual_fs;
             # Example of a passthru
             # passthru = [
@@ -53,7 +53,12 @@ in
             };
           };
         }).clan
-          { config.directory = rootPath; };
+          {
+            directory = rootPath;
+            self = {
+              inputs.nixpkgs.lib.version = "25.11";
+            };
+          };
     in
     {
       inherit vclan;
@@ -94,7 +99,12 @@ in
             };
           };
         }).clan
-          { config.directory = rootPath; };
+          {
+            directory = rootPath;
+            self = {
+              inputs.nixpkgs.lib.version = "25.11";
+            };
+          };
     in
     {
       inherit vclan;

lib/evalService.nix

@@ -17,9 +17,9 @@ lib.evalModules {
   specialArgs._ctx = prefix;
   modules = [
     # Base module
-    ./service-module.nix
+    ./inventory/distributed-service/service-module.nix
     # Feature modules
-    (lib.modules.importApply ./api-feature.nix {
+    (lib.modules.importApply ./inventory/distributed-service/api-feature.nix {
       inherit clanLib prefix;
     })
   ]

lib/flake-module.nix

@@ -10,12 +10,11 @@ in
 rec {
   # TODO: automatically generate this from the directory conventions
   imports = [
-    ./modules/flake-module.nix
     ./clanTest/flake-module.nix
     ./introspection/flake-module.nix
-    ./modules/inventory/flake-module.nix
     ./jsonschema/flake-module.nix
     ./types/flake-module.nix
+    ./inventory/flake-module.nix
   ];
   flake.clanLib =
     let
@@ -78,9 +77,6 @@ rec {
           ../lib
           (lib.fileset.fileFilter (file: file.name == "flake-module.nix") ../.)
           ../flakeModules
-          # ../../nixosModules/clanCore
-          # ../../machines
-          # ../../inventory.json
         ];
       };
     in
@@ -101,6 +97,36 @@ rec {
           touch $out
         '';
       };
+
+      # Run: nix-unit --extra-experimental-features flakes --flake .#legacyPackages.x86_64-linux.evalTests-build-clan
+      legacyPackages.evalTests-build-clan = import ./tests.nix {
+        inherit lib;
+        clan-core = self;
+      };
+      checks = {
+        eval-lib-build-clan = pkgs.runCommand "tests" { nativeBuildInputs = [ pkgs.nix-unit ]; } ''
+          export HOME="$(realpath .)"
+
+          nix-unit --eval-store "$HOME" \
+            --extra-experimental-features flakes \
+            --show-trace \
+            ${inputOverrides} \
+            --flake ${
+              self.filter {
+                include = [
+                  "flakeModules"
+                  "inventory.json"
+                  "lib"
+                  "machines"
+                  "nixosModules"
+                  "modules"
+                ];
+              }
+            }#legacyPackages.${system}.evalTests-build-clan
+
+          touch $out
+        '';
+      };
     };
 
 }

lib/inventory/default.nix

@@ -2,15 +2,11 @@
   lib,
   clanLib,
 }:
-let
-  services = clanLib.callLib ./distributed-service/inventory-adapter.nix { };
-in
 {
-  inherit (services) mapInstances;
   inventoryModule = {
     _file = "clanLib.inventory.module";
     imports = [
-      ../inventoryClass/inventory.nix
+      ../../modules/inventoryClass/inventory.nix
     ];
     _module.args = { inherit clanLib; };
   };

lib/inventory/distributed-service/all-services-wrapper.nix

@@ -28,9 +28,9 @@ in
         elemType = submoduleWith {
           class = "clan.service";
           specialArgs = {
-            exports = config.exports;
             directory = directory;
             clanLib = specialArgs.clanLib;
+            exports = config.exports;
           };
           modules = [
             (

lib/inventory/distributed-service/flake-module.nix

@@ -13,16 +13,18 @@ in
     let
       # Common filtered source for inventory tests
       inventoryTestsSrc = lib.fileset.toSource {
-        root = ../../../..;
+        root = ../../..;
         fileset = lib.fileset.unions [
-          ../../../../flake.nix
+          ../../../flake.nix
-          ../../../../flake.lock
+          ../../../flake.lock
-          (lib.fileset.fileFilter (file: file.name == "flake-module.nix") ../../../..)
+          (lib.fileset.fileFilter (file: file.name == "flake-module.nix") ../../..)
-          ../../../../flakeModules
+          ../../../flakeModules
-          ../../../../lib
+          ../../../lib
-          ../../../../nixosModules/clanCore
+          ../../../nixosModules/clanCore
-          ../../../../machines
+          ../../../nixosModules/machineModules
-          ../../../../inventory.json
+          ../../../machines
+          ../../../inventory.json
+          ../../../modules
         ];
       };
     in

lib/inventory/distributed-service/service-module.nix

@@ -81,6 +81,7 @@ let
   applySettings =
     instanceName: instance:
     lib.mapAttrs (roleName: role: {
+      settings = config.instances.${instanceName}.roles.${roleName}.finalSettings.config;
       machines = lib.mapAttrs (machineName: _v: {
         settings =
           config.instances.${instanceName}.roles.${roleName}.machines.${machineName}.finalSettings.config;
@@ -158,6 +159,29 @@ in
                         (
                           { name, ... }@role:
                           {
+                            options.finalSettings = mkOption {
+                              default = evalMachineSettings instance.name role.name null role.config.settings { };
+                              type = types.raw;
+                              description = ''
+                                Final evaluated settings of the curent-machine
+
+                                This contains the merged and evaluated settings of the role interface,
+                                the role settings and the machine settings.
+
+                                Type: 'configuration' as returned by 'lib.evalModules'
+                              '';
+                              apply = lib.warn ''
+                                === WANRING ===
+                                'roles.<roleName>.settings' do not contain machine specific settings.
+
+                                Prefer `machines.<machineName>.settings` instead. (i.e `perInstance: roles.<roleName>.machines.<machineName>.settings`)
+
+                                If you have a use-case that requires access to the original role settings without machine overrides.
+                                Contact us via matrix (https://matrix.to/#/#clan:clan.lol) or file an issue: https://git.clan.lol
+
+                                This feature will be removed in the next release
+                              '';
+                            };
                             # instances.{instanceName}.roles.{roleName}.machines
                             options.machines = mkOption {
                               description = ''
@@ -216,7 +240,7 @@ in
 
                             options.extraModules = lib.mkOption {
                               default = [ ];
-                              type = types.listOf (types.either types.deferredModule types.str);
+                              type = types.listOf types.deferredModule;
                             };
                           }
                         )
@@ -483,6 +507,9 @@ in
                           type = types.deferredModule;
                           default = { };
                           description = ''
+                            !!! Danger "Experimental Feature"
+                                This feature is experimental and will change in the future.
+
                             export modules defined in 'perInstance'
                             mapped to their instance name
 
@@ -611,6 +638,9 @@ in
               type = types.deferredModule;
               default = { };
               description = ''
+                !!! Danger "Experimental Feature"
+                    This feature is experimental and will change in the future.
+
                 export modules defined in 'perMachine'
                 mapped to their machine name
 
@@ -712,6 +742,9 @@ in
 
     exports = mkOption {
       description = ''
+        !!! Danger "Experimental Feature"
+            This feature is experimental and will change in the future.
+
         This services exports.
         Gets merged with all other services exports.
 
@@ -850,7 +883,11 @@ in
                   instanceRes.nixosModule
                 ]
                 ++ (map (
-                  s: if builtins.typeOf s == "string" then "${directory}/${s}" else s
+                  s:
+                  if builtins.typeOf s == "string" then
+                    lib.warn "String types for 'extraModules' will be deprecated - ${s}" "${directory}/${s}"
+                  else
+                    lib.setDefaultModuleLocation "via inventory.instances.${instanceName}.roles.${roleName}" s
                 ) instanceCfg.roles.${roleName}.extraModules);
               };
             }

lib/inventory/distributed-service/tests/default.nix

@@ -4,63 +4,53 @@
   ...
 }:
 let
-  inherit (lib)
-    evalModules
-    ;
 
-  evalInventory =
+  flakeInputsFixture = {
-    m:
+    upstream.clan.modules = {
-    (evalModules {
+      uzzi = {
-      # Static modules
+        _class = "clan.service";
-      modules = [
+        manifest = {
-        clanLib.inventory.inventoryModule
+          name = "uzzi-from-upstream";
-        {
-          _file = "test file";
-          tags.all = [ ];
-          tags.nixos = [ ];
-          tags.darwin = [ ];
-        }
-        {
-          modules.test = { };
-        }
-        m
-      ];
-    }).config;
-
-  callInventoryAdapter =
-    inventoryModule:
-    let
-      inventory = evalInventory inventoryModule;
-      flakeInputsFixture = {
-        self.clan.modules = inventoryModule.modules or { };
-        # Example upstream module
-        upstream.clan.modules = {
-          uzzi = {
-            _class = "clan.service";
-            manifest = {
-              name = "uzzi-from-upstream";
-            };
-          };
         };
       };
-    in
-    clanLib.inventory.mapInstances {
-      directory = ./.;
-      clanCoreModules = { };
-      flakeInputs = flakeInputsFixture;
-      inherit inventory;
-      exportsModule = { };
     };
+  };
+
+  createTestClan =
+    testClan:
+    let
+      res = clanLib.clan ({
+        # Static / mocked
+        specialArgs = {
+          clan-core = {
+            clan.modules = { };
+          };
+        };
+        self.inputs = flakeInputsFixture // {
+          self.clan = res.config;
+        };
+        directory = ./.;
+        exportsModule = { };
+
+        imports = [
+          testClan
+        ];
+      });
+    in
+    res;
+
 in
 {
   extraModules = import ./extraModules.nix { inherit clanLib; };
   exports = import ./exports.nix { inherit lib clanLib; };
-  settings = import ./settings.nix { inherit lib callInventoryAdapter; };
+  settings = import ./settings.nix { inherit lib createTestClan; };
-  specialArgs = import ./specialArgs.nix { inherit lib callInventoryAdapter; };
+  specialArgs = import ./specialArgs.nix { inherit lib createTestClan; };
-  resolve_module_spec = import ./import_module_spec.nix { inherit lib callInventoryAdapter; };
+  resolve_module_spec = import ./import_module_spec.nix {
+    inherit lib createTestClan;
+  };
   test_simple =
     let
-      res = callInventoryAdapter {
+      res = createTestClan {
         # Authored module
         # A minimal module looks like this
         # It isn't exactly doing anything but it's a valid module that produces an output
@@ -71,7 +61,7 @@ in
           };
         };
         # User config
-        instances."instance_foo" = {
+        inventory.instances."instance_foo" = {
           module = {
             name = "simple-module";
           };
@@ -81,7 +71,7 @@ in
     {
       # Test that the module is mapped into the output
       # We might change the attribute name in the future
-      expr = res.importedModulesEvaluated ? "<clan-core>-simple-module";
+      expr = res.config._services.mappedServices ? "<clan-core>-simple-module";
       expected = true;
       inherit res;
     };
@@ -92,7 +82,7 @@ in
   # All instances should be included within one evaluation to make all of them available
   test_module_grouping =
     let
-      res = callInventoryAdapter {
+      res = createTestClan {
         # Authored module
         # A minimal module looks like this
         # It isn't exactly doing anything but it's a valid module that produces an output
@@ -112,18 +102,19 @@ in
 
           perMachine = { }: { };
         };
+
         # User config
-        instances."instance_foo" = {
+        inventory.instances."instance_foo" = {
           module = {
             name = "A";
           };
         };
-        instances."instance_bar" = {
+        inventory.instances."instance_bar" = {
           module = {
             name = "B";
           };
         };
-        instances."instance_baz" = {
+        inventory.instances."instance_baz" = {
           module = {
             name = "A";
           };
@@ -133,16 +124,16 @@ in
     {
       # Test that the module is mapped into the output
       # We might change the attribute name in the future
-      expr = lib.mapAttrs (_n: v: builtins.length v) res.grouped;
+      expr = lib.attrNames res.config._services.mappedServices;
-      expected = {
+      expected = [
-        "<clan-core>-A" = 2;
+        "<clan-core>-A"
-        "<clan-core>-B" = 1;
+        "<clan-core>-B"
-      };
+      ];
     };
 
   test_creates_all_instances =
     let
-      res = callInventoryAdapter {
+      res = createTestClan {
         # Authored module
         # A minimal module looks like this
         # It isn't exactly doing anything but it's a valid module that produces an output
@@ -154,22 +145,24 @@ in
 
           perMachine = { }: { };
         };
-        instances."instance_foo" = {
+        inventory = {
-          module = {
+          instances."instance_foo" = {
-            name = "A";
+            module = {
-            input = "self";
+              name = "A";
+              input = "self";
+            };
           };
-        };
+          instances."instance_bar" = {
-        instances."instance_bar" = {
+            module = {
-          module = {
+              name = "A";
-            name = "A";
+              input = "self";
-            input = "self";
+            };
           };
-        };
+          instances."instance_zaza" = {
-        instances."instance_zaza" = {
+            module = {
-          module = {
+              name = "B";
-            name = "B";
+              input = null;
-            input = null;
+            };
           };
         };
       };
@@ -177,7 +170,7 @@ in
     {
       # Test that the module is mapped into the output
       # We might change the attribute name in the future
-      expr = lib.attrNames res.importedModulesEvaluated.self-A.instances;
+      expr = lib.attrNames res.config._services.mappedServices.self-A.instances;
       expected = [
         "instance_bar"
         "instance_foo"
@@ -187,7 +180,7 @@ in
   # Membership via roles
   test_add_machines_directly =
     let
-      res = callInventoryAdapter {
+      res = createTestClan {
         # Authored module
         # A minimal module looks like this
         # It isn't exactly doing anything but it's a valid module that produces an output
@@ -202,38 +195,40 @@ in
 
           # perMachine = {}: {};
         };
-        machines = {
+        inventory = {
-          jon = { };
+          machines = {
-          sara = { };
+            jon = { };
-          hxi = { };
+            sara = { };
-        };
+            hxi = { };
-        instances."instance_foo" = {
-          module = {
-            name = "A";
-            input = "self";
           };
-          roles.peer.machines.jon = { };
+          instances."instance_foo" = {
-        };
+            module = {
-        instances."instance_bar" = {
+              name = "A";
-          module = {
+              input = "self";
-            name = "A";
+            };
-            input = "self";
+            roles.peer.machines.jon = { };
           };
-          roles.peer.machines.sara = { };
+          instances."instance_bar" = {
-        };
+            module = {
-        instances."instance_zaza" = {
+              name = "A";
-          module = {
+              input = "self";
-            name = "B";
+            };
-            input = null;
+            roles.peer.machines.sara = { };
+          };
+          instances."instance_zaza" = {
+            module = {
+              name = "B";
+              input = null;
+            };
+            roles.peer.tags.all = { };
           };
-          roles.peer.tags.all = { };
         };
       };
     in
     {
       # Test that the module is mapped into the output
       # We might change the attribute name in the future
-      expr = lib.attrNames res.importedModulesEvaluated.self-A.result.allMachines;
+      expr = lib.attrNames res.config._services.mappedServices.self-A.result.allMachines;
       expected = [
         "jon"
         "sara"
@@ -243,7 +238,7 @@ in
   # Membership via tags
   test_add_machines_via_tags =
     let
-      res = callInventoryAdapter {
+      res = createTestClan {
         # Authored module
         # A minimal module looks like this
         # It isn't exactly doing anything but it's a valid module that produces an output
@@ -257,35 +252,37 @@ in
 
           # perMachine = {}: {};
         };
-        machines = {
+        inventory = {
-          jon = {
+          machines = {
-            tags = [ "foo" ];
+            jon = {
+              tags = [ "foo" ];
+            };
+            sara = {
+              tags = [ "foo" ];
+            };
+            hxi = { };
           };
-          sara = {
+          instances."instance_foo" = {
-            tags = [ "foo" ];
+            module = {
+              name = "A";
+              input = "self";
+            };
+            roles.peer.tags.foo = { };
           };
-          hxi = { };
+          instances."instance_zaza" = {
-        };
+            module = {
-        instances."instance_foo" = {
+              name = "B";
-          module = {
+              input = null;
-            name = "A";
+            };
-            input = "self";
+            roles.peer.tags.all = { };
           };
-          roles.peer.tags.foo = { };
-        };
-        instances."instance_zaza" = {
-          module = {
-            name = "B";
-            input = null;
-          };
-          roles.peer.tags.all = { };
         };
       };
     in
     {
       # Test that the module is mapped into the output
       # We might change the attribute name in the future
-      expr = lib.attrNames res.importedModulesEvaluated.self-A.result.allMachines;
+      expr = lib.attrNames res.config._services.mappedServices.self-A.result.allMachines;
       expected = [
         "jon"
         "sara"
@@ -293,6 +290,9 @@ in
     };
 
   machine_imports = import ./machine_imports.nix { inherit lib clanLib; };
-  per_machine_args = import ./per_machine_args.nix { inherit lib callInventoryAdapter; };
+  per_machine_args = import ./per_machine_args.nix { inherit lib createTestClan; };
-  per_instance_args = import ./per_instance_args.nix { inherit lib callInventoryAdapter; };
+  per_instance_args = import ./per_instance_args.nix {
+    inherit lib;
+    callInventoryAdapter = createTestClan;
+  };
 }

lib/inventory/distributed-service/tests/import_module_spec.nix

@@ -1,4 +1,4 @@
-{ callInventoryAdapter, ... }:
+{ createTestClan, ... }:
 let
   # Authored module
   # A minimal module looks like this
@@ -23,10 +23,13 @@ let
 
   resolve =
     spec:
-    callInventoryAdapter {
+    createTestClan {
-      inherit modules machines;
+      inherit modules;
-      instances."instance_foo" = {
+      inventory = {
-        module = spec;
+        inherit machines;
+        instances."instance_foo" = {
+          module = spec;
+        };
       };
     };
 in
@@ -36,25 +39,16 @@ in
       (resolve {
         name = "A";
         input = "self";
-      }).importedModuleWithInstances.instance_foo.resolvedModule;
+      }).config._services.mappedServices.self-A.manifest.name;
-    expected = {
+    expected = "network";
-      _class = "clan.service";
-      manifest = {
-        name = "network";
-      };
-    };
   };
   test_import_remote_module_by_name = {
     expr =
       (resolve {
         name = "uzzi";
         input = "upstream";
-      }).importedModuleWithInstances.instance_foo.resolvedModule;
+      }).config._services.mappedServices.upstream-uzzi.manifest.name;
-    expected = {
+    expected = "uzzi-from-upstream";
-      _class = "clan.service";
+
-      manifest = {
-        name = "uzzi-from-upstream";
-      };
-    };
   };
 }

lib/inventory/distributed-service/tests/per_instance_args.nix

@@ -58,39 +58,43 @@ let
     sara = { };
   };
   res = callInventoryAdapter {
-    inherit modules machines;
+    inherit modules;
-    instances."instance_foo" = {
+
-      module = {
+    inventory = {
-        name = "A";
+      inherit machines;
-        input = "self";
+      instances."instance_foo" = {
+        module = {
+          name = "A";
+          input = "self";
+        };
+        roles.peer.machines.jon = {
+          settings.timeout = lib.mkForce "foo-peer-jon";
+        };
+        roles.peer = {
+          settings.timeout = "foo-peer";
+        };
+        roles.controller.machines.jon = { };
       };
-      roles.peer.machines.jon = {
+      instances."instance_bar" = {
-        settings.timeout = lib.mkForce "foo-peer-jon";
+        module = {
+          name = "A";
+          input = "self";
+        };
+        roles.peer.machines.jon = {
+          settings.timeout = "bar-peer-jon";
+        };
       };
-      roles.peer = {
+      # TODO: move this into a seperate test.
-        settings.timeout = "foo-peer";
+      # Seperate out the check that this module is never imported
+      # import the module "B" (undefined)
+      # All machines have this instance
+      instances."instance_zaza" = {
+        module = {
+          name = "B";
+          input = null;
+        };
+        roles.peer.tags.all = { };
       };
-      roles.controller.machines.jon = { };
-    };
-    instances."instance_bar" = {
-      module = {
-        name = "A";
-        input = "self";
-      };
-      roles.peer.machines.jon = {
-        settings.timeout = "bar-peer-jon";
-      };
-    };
-    # TODO: move this into a seperate test.
-    # Seperate out the check that this module is never imported
-    # import the module "B" (undefined)
-    # All machines have this instance
-    instances."instance_zaza" = {
-      module = {
-        name = "B";
-        input = null;
-      };
-      roles.peer.tags.all = { };
     };
   };
 
@@ -105,9 +109,10 @@ in
 {
   # settings should evaluate
   test_per_instance_arguments = {
+    inherit res;
     expr = {
       instanceName =
-        res.importedModulesEvaluated.self-A.result.allRoles.peer.allInstances."instance_foo".allMachines.jon.passthru.instanceName;
+        res.config._services.mappedServices.self-A.result.allRoles.peer.allInstances."instance_foo".allMachines.jon.passthru.instanceName;
 
       # settings are specific.
       # Below we access:
@@ -115,11 +120,11 @@ in
       # roles = peer
       # machines = jon
       settings =
-        res.importedModulesEvaluated.self-A.result.allRoles.peer.allInstances.instance_foo.allMachines.jon.passthru.settings;
+        res.config._services.mappedServices.self-A.result.allRoles.peer.allInstances.instance_foo.allMachines.jon.passthru.settings;
       machine =
-        res.importedModulesEvaluated.self-A.result.allRoles.peer.allInstances.instance_foo.allMachines.jon.passthru.machine;
+        res.config._services.mappedServices.self-A.result.allRoles.peer.allInstances.instance_foo.allMachines.jon.passthru.machine;
       roles =
-        res.importedModulesEvaluated.self-A.result.allRoles.peer.allInstances.instance_foo.allMachines.jon.passthru.roles;
+        res.config._services.mappedServices.self-A.result.allRoles.peer.allInstances.instance_foo.allMachines.jon.passthru.roles;
     };
     expected = {
       instanceName = "instance_foo";
@@ -137,6 +142,7 @@ in
               settings = { };
             };
           };
+          settings = { };
         };
         peer = {
           machines = {
@@ -146,6 +152,9 @@ in
               };
             };
           };
+          settings = {
+            timeout = "foo-peer";
+          };
         };
       };
       settings = {
@@ -156,9 +165,9 @@ in
 
   # TODO: Cannot be tested like this anymore
   test_per_instance_settings_vendoring = {
-    x = res.importedModulesEvaluated.self-A;
+    x = res.config._services.mappedServices.self-A;
     expr =
-      res.importedModulesEvaluated.self-A.result.allRoles.peer.allInstances.instance_foo.allMachines.jon.passthru.vendoredSettings;
+      res.config._services.mappedServices.self-A.result.allRoles.peer.allInstances.instance_foo.allMachines.jon.passthru.vendoredSettings;
     expected = {
       timeout = "config.thing";
     };

lib/inventory/distributed-service/tests/per_machine_args.nix

@@ -1,4 +1,4 @@
-{ lib, callInventoryAdapter }:
+{ lib, createTestClan }:
 let
   # Authored module
   # A minimal module looks like this
@@ -39,36 +39,40 @@ let
     jon = { };
     sara = { };
   };
-  res = callInventoryAdapter {
+  res = createTestClan {
-    inherit modules machines;
+    inherit modules;
-    instances."instance_foo" = {
+    inventory = {
-      module = {
+
-        name = "A";
+      inherit machines;
-        input = "self";
+      instances."instance_foo" = {
+        module = {
+          name = "A";
+          input = "self";
+        };
+        roles.peer.machines.jon = {
+          settings.timeout = lib.mkForce "foo-peer-jon";
+        };
+        roles.peer = {
+          settings.timeout = "foo-peer";
+        };
       };
-      roles.peer.machines.jon = {
+      instances."instance_bar" = {
-        settings.timeout = lib.mkForce "foo-peer-jon";
+        module = {
+          name = "A";
+          input = "self";
+        };
+        roles.peer.machines.jon = {
+          settings.timeout = "bar-peer-jon";
+        };
       };
-      roles.peer = {
+      instances."instance_zaza" = {
-        settings.timeout = "foo-peer";
+        module = {
+          name = "B";
+          input = null;
+        };
+        roles.peer.tags.all = { };
       };
     };
-    instances."instance_bar" = {
-      module = {
-        name = "A";
-        input = "self";
-      };
-      roles.peer.machines.jon = {
-        settings.timeout = "bar-peer-jon";
-      };
-    };
-    instances."instance_zaza" = {
-      module = {
-        name = "B";
-        input = null;
-      };
-      roles.peer.tags.all = { };
-    };
   };
 in
 
@@ -79,7 +83,7 @@ in
     inherit res;
     expr = {
       hasMachineSettings =
-        res.importedModulesEvaluated.self-A.result.allMachines.jon.passthru.instances.instance_foo.roles.peer.machines.jon
+        res.config._services.mappedServices.self-A.result.allMachines.jon.passthru.instances.instance_foo.roles.peer.machines.jon
         ? settings;
 
       # settings are specific.
@@ -88,10 +92,10 @@ in
       # roles = peer
       # machines = jon
       specificMachineSettings =
-        res.importedModulesEvaluated.self-A.result.allMachines.jon.passthru.instances.instance_foo.roles.peer.machines.jon.settings;
+        res.config._services.mappedServices.self-A.result.allMachines.jon.passthru.instances.instance_foo.roles.peer.machines.jon.settings;
 
       hasRoleSettings =
-        res.importedModulesEvaluated.self-A.result.allMachines.jon.passthru.instances.instance_foo.roles.peer
+        res.config._services.mappedServices.self-A.result.allMachines.jon.passthru.instances.instance_foo.roles.peer
         ? settings;
 
       # settings are specific.
@@ -100,20 +104,25 @@ in
       # roles = peer
       # machines = *
       specificRoleSettings =
-        res.importedModulesEvaluated.self-A.result.allMachines.jon.passthru.instances.instance_foo.roles.peer;
+        res.config._services.mappedServices.self-A.result.allMachines.jon.passthru.instances.instance_foo.roles.peer;
     };
-    expected = rec {
+    expected = {
       hasMachineSettings = true;
-      hasRoleSettings = false;
+      hasRoleSettings = true;
       specificMachineSettings = {
         timeout = "foo-peer-jon";
       };
       specificRoleSettings = {
         machines = {
           jon = {
-            settings = specificMachineSettings;
+            settings = {
+              timeout = "foo-peer-jon";
+            };
           };
         };
+        settings = {
+          timeout = "foo-peer";
+        };
       };
     };
   };

lib/inventory/distributed-service/tests/settings.nix

@@ -1,6 +1,6 @@
-{ callInventoryAdapter, lib, ... }:
+{ createTestClan, lib, ... }:
 let
-  res = callInventoryAdapter {
+  res = createTestClan {
     modules."A" = {
       _class = "clan.service";
       manifest = {
@@ -21,28 +21,31 @@ let
           };
         };
     };
-    machines = {
+    inventory = {
-      jon = { };
+
-      sara = { };
+      machines = {
-    };
+        jon = { };
-    instances."instance_foo" = {
+        sara = { };
-      module = {
-        name = "A";
-        input = "self";
       };
-      # Settings for both jon and sara
+      instances."instance_foo" = {
-      roles.peer.settings = {
+        module = {
-        timeout = 40;
+          name = "A";
+          input = "self";
+        };
+        # Settings for both jon and sara
+        roles.peer.settings = {
+          timeout = 40;
+        };
+        # Jon overrides timeout
+        roles.peer.machines.jon = {
+          settings.timeout = lib.mkForce 42;
+        };
+        roles.peer.machines.sara = { };
       };
-      # Jon overrides timeout
-      roles.peer.machines.jon = {
-        settings.timeout = lib.mkForce 42;
-      };
-      roles.peer.machines.sara = { };
     };
   };
 
-  config = res.servicesEval.config.mappedServices.self-A;
+  config = res.config._services.mappedServices.self-A;
 
   #
   applySettings =

lib/inventory/distributed-service/tests/specialArgs.nix

@@ -1,6 +1,6 @@
-{ callInventoryAdapter, lib, ... }:
+{ createTestClan, lib, ... }:
 let
-  res = callInventoryAdapter {
+  res = createTestClan {
     modules."A" = m: {
       _class = "clan.service";
       config = {
@@ -14,19 +14,21 @@ let
         default = m;
       };
     };
-    machines = {
+    inventory = {
-      jon = { };
+      machines = {
-    };
+        jon = { };
-    instances."instance_foo" = {
+      };
-      module = {
+      instances."instance_foo" = {
-        name = "A";
+        module = {
-        input = "self";
+          name = "A";
+          input = "self";
+        };
+        roles.peer.machines.jon = { };
       };
-      roles.peer.machines.jon = { };
     };
   };
 
-  specialArgs = lib.attrNames res.servicesEval.config.mappedServices.self-A.test.specialArgs;
+  specialArgs = lib.attrNames res.config._services.mappedServices.self-A.test.specialArgs;
 in
 {
   test_simple = {

lib/modules/clan/default.nix

@@ -1,12 +0,0 @@
-{ clan-core }:
-{
-  _class = "clan";
-  _module.args = {
-    inherit clan-core;
-    inherit (clan-core) clanLib;
-  };
-  imports = [
-    ./module.nix
-    ./interface.nix
-  ];
-}

lib/modules/clan/flake-module.nix

@@ -1,4 +0,0 @@
-{ self, lib, ... }:
-{
-  flake.modules.clan.default = lib.modules.importApply ./default.nix { clan-core = self; };
-}

lib/modules/flake-module.nix

@@ -1,58 +0,0 @@
-{
-  self,
-  inputs,
-  ...
-}:
-let
-  inputOverrides = self.clanLib.flake-inputs.getOverrides inputs;
-in
-{
-  imports = [
-    ./clan/flake-module.nix
-  ];
-  perSystem =
-    {
-      pkgs,
-      lib,
-      system,
-      ...
-    }:
-    let
-      jsonDocs = import ./eval-docs.nix {
-        inherit pkgs lib;
-        clan-core = self;
-      };
-    in
-    {
-      legacyPackages.clan-options = jsonDocs.optionsJSON;
-
-      # Run: nix-unit --extra-experimental-features flakes --flake .#legacyPackages.x86_64-linux.evalTests-build-clan
-      legacyPackages.evalTests-build-clan = import ./tests.nix {
-        inherit lib;
-        clan-core = self;
-      };
-      checks = {
-        eval-lib-build-clan = pkgs.runCommand "tests" { nativeBuildInputs = [ pkgs.nix-unit ]; } ''
-          export HOME="$(realpath .)"
-
-          nix-unit --eval-store "$HOME" \
-            --extra-experimental-features flakes \
-            --show-trace \
-            ${inputOverrides} \
-            --flake ${
-              self.filter {
-                include = [
-                  "flakeModules"
-                  "inventory.json"
-                  "lib"
-                  "machines"
-                  "nixosModules"
-                ];
-              }
-            }#legacyPackages.${system}.evalTests-build-clan
-
-          touch $out
-        '';
-      };
-    };
-}

lib/modules/inventory/distributed-service/inventory-adapter.nix

@@ -1,171 +0,0 @@
-# Adapter function between the inventory.instances and the clan.service module
-#
-# Data flow:
-# - inventory.instances -> Adapter -> clan.service module -> Service Resources (i.e. NixosModules per Machine, Vars per Service, etc.)
-#
-# What this file does:
-#
-# - Resolves the [Module] to an actual module-path and imports it.
-# - Groups together all the same modules into a single import and creates all instances for it.
-# - Resolves the inventory tags into machines. Tags don't exist at the service level.
-#   Also combines the settings for 'machines' and 'tags'.
-{
-  lib,
-  clanLib,
-  ...
-}:
-{
-  mapInstances =
-    {
-      # This is used to resolve the module imports from 'flake.inputs'
-      flakeInputs,
-      # The clan inventory
-      inventory,
-      directory,
-      clanCoreModules,
-      prefix ? [ ],
-      exportsModule,
-    }:
-    let
-      # machineHasTag = machineName: tagName: lib.elem tagName inventory.machines.${machineName}.tags;
-
-      # map the instances into the module
-      importedModuleWithInstances = lib.mapAttrs (
-        instanceName: instance:
-        let
-          resolvedModule = clanLib.resolveModule {
-            moduleSpec = instance.module;
-            inherit flakeInputs clanCoreModules;
-          };
-
-          # Every instance includes machines via roles
-          # :: { client :: ... }
-          instanceRoles = lib.mapAttrs (
-            roleName: role:
-            let
-              resolvedMachines = clanLib.inventory.resolveTags {
-                members = {
-                  # Explicit members
-                  machines = lib.attrNames role.machines;
-                  # Resolved Members
-                  tags = lib.attrNames role.tags;
-                };
-                inherit (inventory) machines;
-                inherit instanceName roleName;
-              };
-            in
-            # instances.<instanceName>.roles.<roleName> =
-            # Remove "tags", they are resolved into "machines"
-            (removeAttrs role [ "tags" ])
-            // {
-              machines = lib.genAttrs resolvedMachines.machines (
-                machineName:
-                let
-                  machineSettings = instance.roles.${roleName}.machines.${machineName}.settings or { };
-                in
-                # TODO: tag settings
-                # Wait for this feature until option introspection for 'settings' is done.
-                # This might get too complex to handle otherwise.
-                # settingsViaTags = lib.filterAttrs (
-                #   tagName: _: machineHasTag machineName tagName
-                # ) instance.roles.${roleName}.tags;
-                {
-                  # TODO: Do we want to wrap settings with
-                  # setDefaultModuleLocation "inventory.instances.${instanceName}.roles.${roleName}.tags.${tagName}";
-                  settings = {
-                    imports = [
-                      machineSettings
-                    ]; # ++ lib.attrValues (lib.mapAttrs (_tagName: v: v.settings) settingsViaTags);
-                  };
-                }
-              );
-            }
-          ) instance.roles;
-        in
-        {
-          inherit (instance) module;
-          inherit resolvedModule instanceRoles;
-        }
-      ) inventory.instances or { };
-
-      # Group the instances by the module they resolve to
-      # This is necessary to evaluate the module in a single pass
-      # :: { <module.input>_<module.name> :: [ { name, value } ] }
-      # Since 'perMachine' needs access to all the instances we should include them as a whole
-      grouped = lib.foldlAttrs (
-        acc: instanceName: instance:
-        let
-          inputName = if instance.module.input == null then "<clan-core>" else instance.module.input;
-          id = inputName + "-" + instance.module.name;
-        in
-        acc
-        // {
-          ${id} = acc.${id} or [ ] ++ [
-            {
-              inherit instanceName instance;
-            }
-          ];
-        }
-      ) { } importedModuleWithInstances;
-
-      # servicesEval.config.mappedServices.self-A.result.final.jon.nixosModule
-      allMachines = lib.mapAttrs (machineName: _: {
-        # This is the list of nixosModules for each machine
-        machineImports = lib.foldlAttrs (
-          acc: _module_ident: serviceModule:
-          acc ++ [ serviceModule.result.final.${machineName}.nixosModule or { } ]
-        ) [ ] servicesEval.config.mappedServices;
-      }) inventory.machines or { };
-
-      evalServices =
-        { modules, prefix }:
-        lib.evalModules {
-          class = "clan";
-          specialArgs = {
-            inherit clanLib;
-            _ctx = prefix;
-          };
-          modules = [
-            (import ./all-services-wrapper.nix { inherit directory; })
-          ]
-          ++ modules;
-        };
-
-      servicesEval = evalServices {
-        inherit prefix;
-        modules = [
-          {
-            inherit exportsModule;
-            mappedServices = lib.mapAttrs (_module_ident: instances: {
-              imports = [
-                # Import the resolved module.
-                # i.e. clan.modules.admin
-                {
-                  options.module = lib.mkOption {
-                    type = lib.types.raw;
-                    default = (builtins.head instances).instance.module;
-                  };
-                }
-                (builtins.head instances).instance.resolvedModule
-              ] # Include all the instances that correlate to the resolved module
-              ++ (builtins.map (v: {
-                instances.${v.instanceName}.roles = v.instance.instanceRoles;
-              }) instances);
-            }) grouped;
-          }
-        ];
-      };
-      importedModulesEvaluated = servicesEval.config.mappedServices;
-
-    in
-    {
-      inherit
-        servicesEval
-        importedModuleWithInstances
-        # Exposed for testing
-        grouped
-        allMachines
-        importedModulesEvaluated
-        ;
-    };
-}

lib/modules/inventoryClass/builder/default.nix

@@ -1,5 +0,0 @@
-{
-  imports = [
-    ./interface.nix
-  ];
-}

lib/modules/inventoryClass/builder/interface.nix

@@ -1,28 +0,0 @@
-{ lib, ... }:
-let
-  inherit (lib) types mkOption;
-  submodule = m: types.submoduleWith { modules = [ m ]; };
-
-in
-{
-  options = {
-    directory = mkOption {
-      type = types.path;
-    };
-    distributedServices = mkOption {
-      type = types.raw;
-    };
-    inventory = mkOption {
-      type = types.raw;
-    };
-    machines = mkOption {
-      type = types.attrsOf (submodule ({
-        options = {
-          machineImports = mkOption {
-            type = types.listOf types.raw;
-          };
-        };
-      }));
-    };
-  };
-}

lib/modules/inventoryClass/inventory-introspection.nix

@@ -1,20 +0,0 @@
-{
-  config,
-  lib,
-  clanLib,
-  ...
-}:
-{
-  options.introspection = lib.mkOption {
-    readOnly = true;
-    # TODO: use options.inventory instead of the evaluate config attribute
-    default =
-      builtins.removeAttrs (clanLib.introspection.getPrios { options = config.inventory.options; })
-        # tags are freeformType which is not supported yet.
-        # services is removed and throws an error if accessed.
-        [
-          "tags"
-          "services"
-        ];
-  };
-}

lib/modules/inventoryClass/service-list-from-inputs.nix

@@ -1,70 +0,0 @@
-{
-  flakeInputs,
-  clanLib,
-}:
-{ lib, config, ... }:
-let
-  inspectModule =
-    inputName: moduleName: module:
-    let
-      eval = clanLib.evalService {
-        modules = [ module ];
-        prefix = [
-          inputName
-          "clan"
-          "modules"
-          moduleName
-        ];
-      };
-    in
-    {
-      manifest = eval.config.manifest;
-      roles = lib.mapAttrs (_n: v: { inherit (v) description; }) eval.config.roles;
-    };
-in
-{
-  options.staticModules = lib.mkOption {
-    readOnly = true;
-    type = lib.types.raw;
-
-    apply = moduleSet: lib.mapAttrs (inspectModule "<clan-core>") moduleSet;
-  };
-  options.modulesPerSource = lib.mkOption {
-    # { sourceName :: { moduleName :: {} }}
-    readOnly = true;
-    type = lib.types.raw;
-    default =
-      let
-        inputsWithModules = lib.filterAttrs (_inputName: v: v ? clan.modules) flakeInputs;
-      in
-      lib.mapAttrs (
-        inputName: v: lib.mapAttrs (inspectModule inputName) v.clan.modules
-      ) inputsWithModules;
-  };
-  options.moduleSchemas = lib.mkOption {
-    # { sourceName :: { moduleName :: { roleName :: Schema }}}
-    readOnly = true;
-    type = lib.types.raw;
-    default = lib.mapAttrs (
-      _inputName: moduleSet:
-      lib.mapAttrs (
-        _moduleName: module:
-        (clanLib.evalService {
-          modules = [ module ];
-          prefix = [ ];
-        }).config.result.api.schema
-      ) moduleSet
-    ) config.modulesPerSource;
-  };
-  options.templatesPerSource = lib.mkOption {
-    # { sourceName :: { moduleName :: {} }}
-    readOnly = true;
-    type = lib.types.raw;
-    default =
-      let
-        inputsWithTemplates = lib.filterAttrs (_inputName: v: v ? clan.templates) flakeInputs;
-      in
-      lib.mapAttrs (_inputName: v: lib.mapAttrs (_n: t: t) v.clan.templates) inputsWithTemplates;
-
-  };
-}

lib/test/flakeModules.nix

@@ -62,6 +62,9 @@
               # Core libraries
               (root + "/lib")
 
+              # modules directory
+              (root + "/modules")
+
               # User-provided fileset
               fileset
             ];

lib/tests.nix

@@ -81,6 +81,7 @@ in
         description = null;
         icon = null;
         name = "test";
+        tld = "clan";
       };
     };
 
@@ -105,7 +106,7 @@ in
         self = {
           inputs = { };
         };
-        directory = ../../.;
+        directory = ../.;
         meta.name = "test-clan-core";
       };
     in
@@ -123,7 +124,7 @@ in
         self = {
           inputs = { };
         };
-        directory = ../../.;
+        directory = ../.;
         meta.name = "test-clan-core";
       };
     in
@@ -211,6 +212,87 @@ in
       };
     };
 
+  test_clan_check_simple_fail =
+    let
+      eval = clan {
+        checks.constFail = {
+          assertion = false;
+          message = "This is a constant failure";
+        };
+      };
+    in
+    {
+      result = eval;
+      expr = eval.config;
+      expectedError.type = "ThrownError";
+      expectedError.msg = "This is a constant failure";
+    };
+  test_clan_check_simple_pass =
+    let
+      eval = clan {
+        checks.constFail = {
+          assertion = true;
+          message = "This is a constant success";
+        };
+      };
+    in
+    {
+      result = eval;
+      expr = lib.seq eval.config 42;
+      expected = 42;
+    };
+
+  test_get_var_machine =
+    let
+      varsLib = import ./vars.nix { };
+    in
+    {
+      expr = varsLib.getPublicValue {
+        backend = "in_repo";
+        default = "test";
+        shared = false;
+        generator = "test-generator";
+        machine = "test-machine";
+        file = "test-file";
+        flake = ./vars-test-flake;
+      };
+      expected = "foo-machine";
+    };
+
+  test_get_var_shared =
+    let
+      varsLib = import ./vars.nix { };
+    in
+    {
+      expr = varsLib.getPublicValue {
+        backend = "in_repo";
+        default = "test";
+        shared = true;
+        generator = "test-generator";
+        machine = "test-machine";
+        file = "test-file";
+        flake = ./vars-test-flake;
+      };
+      expected = "foo-shared";
+    };
+
+  test_get_var_default =
+    let
+      varsLib = import ./vars.nix { };
+    in
+    {
+      expr = varsLib.getPublicValue {
+        backend = "in_repo";
+        default = "test-default";
+        shared = true;
+        generator = "test-generator-wrong";
+        machine = "test-machine";
+        file = "test-file";
+        flake = ./vars-test-flake;
+      };
+      expected = "test-default";
+    };
+
   test_clan_all_machines_laziness =
     let
       eval = clan {

lib/vars-test-flake/vars/per-machine/test-machine/test-generator/test-file/value

@@ -0,0 +1 @@
+foo-machine

lib/vars-test-flake/vars/shared/test-generator/test-file/value

@@ -0,0 +1 @@
+foo-shared

lib/vars.nix

@@ -0,0 +1,25 @@
+_: {
+  getPublicValue =
+    {
+
+      backend ? "in_repo",
+      default ? throw "getPublicValue: Public value ${machine}/${generator}/${file} not found!",
+      shared ? false,
+      generator,
+      machine,
+      file,
+      flake,
+    }:
+
+    if backend == "in_repo" then
+      let
+        path =
+          if shared then
+            "${flake}/vars/shared/${generator}/${file}/value"
+          else
+            "${flake}/vars/per-machine/${machine}/${generator}/${file}/value";
+      in
+      if builtins.pathExists path then builtins.readFile path else default
+    else
+      throw "backend ${backend} does not implement getPublicValue";
+}

lib/vars_test.nix

@@ -0,0 +1,3 @@
+{
+
+}

modules/clan/checks.nix

@@ -0,0 +1,16 @@
+{ lib, nixpkgs, ... }:
+{
+  checks.minNixpkgsVersion = {
+    assertion = lib.versionAtLeast nixpkgs.lib.version "25.11";
+    message = ''
+      Nixpkgs version: ${nixpkgs.lib.version} is incompatible with clan-core. (>= 25.11 is recommended)
+      ---
+      Your version of 'nixpkgs' seems too old for clan-core.
+      Please read: https://docs.clan.lol/guides/nixpkgs-flake-input
+
+      You can ignore this check by setting:
+      clan.checks.minNixpkgsVersion.ignore = true;
+      ---
+    '';
+  };
+}

modules/clan/default.nix

@@ -0,0 +1,25 @@
+/**
+  Root 'clan' Module
+
+  Defines lib.clan and flake-parts.clan options
+  and all common logic for the 'clan' module.
+
+  - has Class _class = "clan"
+
+  - _module.args.clan-core: reference to clan-core flake
+  - _module.args.clanLib: reference to lib.clan function
+*/
+{ clan-core }:
+{
+  _class = "clan";
+  _module.args = {
+    inherit clan-core;
+    inherit (clan-core) clanLib;
+  };
+  imports = [
+    ./top-level-interface.nix
+    ./module.nix
+    ./distributed-services.nix
+    ./checks.nix
+  ];
+}

modules/clan/distributed-services.nix

@@ -0,0 +1,163 @@
+{
+  lib,
+  clanLib,
+  config,
+  clan-core,
+  ...
+}:
+let
+  inherit (lib) mkOption types;
+  # Keep a reference to top-level
+  clanConfig = config;
+
+  inventory = clanConfig.inventory;
+  flakeInputs = clanConfig.self.inputs;
+  clanCoreModules = clan-core.clan.modules;
+
+  grouped = lib.foldlAttrs (
+    acc: instanceName: instance:
+    let
+      inputName = if instance.module.input == null then "<clan-core>" else instance.module.input;
+      id = inputName + "-" + instance.module.name;
+    in
+    acc
+    // {
+      ${id} = acc.${id} or [ ] ++ [
+        {
+          inherit instanceName instance;
+        }
+      ];
+    }
+  ) { } importedModuleWithInstances;
+
+  importedModuleWithInstances = lib.mapAttrs (
+    instanceName: instance:
+    let
+      resolvedModule = clanLib.resolveModule {
+        moduleSpec = instance.module;
+        inherit flakeInputs clanCoreModules;
+      };
+
+      # Every instance includes machines via roles
+      # :: { client :: ... }
+      instanceRoles = lib.mapAttrs (
+        roleName: role:
+        let
+          resolvedMachines = clanLib.inventory.resolveTags {
+            members = {
+              # Explicit members
+              machines = lib.attrNames role.machines;
+              # Resolved Members
+              tags = lib.attrNames role.tags;
+            };
+            inherit (inventory) machines;
+            inherit instanceName roleName;
+          };
+        in
+        # instances.<instanceName>.roles.<roleName> =
+        # Remove "tags", they are resolved into "machines"
+        (removeAttrs role [ "tags" ])
+        // {
+          machines = lib.genAttrs resolvedMachines.machines (
+            machineName:
+            let
+              machineSettings = instance.roles.${roleName}.machines.${machineName}.settings or { };
+            in
+            # TODO: tag settings
+            # Wait for this feature until option introspection for 'settings' is done.
+            # This might get too complex to handle otherwise.
+            # settingsViaTags = lib.filterAttrs (
+            #   tagName: _: machineHasTag machineName tagName
+            # ) instance.roles.${roleName}.tags;
+            {
+              # TODO: Do we want to wrap settings with
+              # setDefaultModuleLocation "inventory.instances.${instanceName}.roles.${roleName}.tags.${tagName}";
+              settings = {
+                imports = [
+                  machineSettings
+                ]; # ++ lib.attrValues (lib.mapAttrs (_tagName: v: v.settings) settingsViaTags);
+              };
+            }
+          );
+        }
+      ) instance.roles;
+    in
+    {
+      inherit (instance) module;
+      inherit resolvedModule instanceRoles;
+    }
+  ) inventory.instances or { };
+in
+{
+  _class = "clan";
+  options._services = mkOption {
+    visible = false;
+    description = ''
+      All service instances
+
+      !!! Danger "Internal API"
+        Do not rely on this API yet.
+
+        - Will be renamed to just 'services' in the future.
+        Once the name can be claimed again.
+        - Structure will change.
+
+        API will be declared as public after beeing simplified.
+    '';
+    type = types.submoduleWith {
+      # TODO: Remove specialArgs
+      specialArgs = {
+        inherit clanLib;
+      };
+      modules = [
+        (import ../../lib/inventory/distributed-service/all-services-wrapper.nix {
+          inherit (clanConfig) directory;
+        })
+        # Dependencies
+        {
+          exportsModule = clanConfig.exportsModule;
+        }
+        {
+          # TODO: Rename to "allServices"
+          # All services
+          mappedServices = lib.mapAttrs (_module_ident: instances: {
+            imports = [
+              # Import the resolved module.
+              # i.e. clan.modules.admin
+              {
+                options.module = lib.mkOption {
+                  type = lib.types.raw;
+                  default = (builtins.head instances).instance.module;
+                };
+              }
+              (builtins.head instances).instance.resolvedModule
+            ] # Include all the instances that correlate to the resolved module
+            ++ (builtins.map (v: {
+              instances.${v.instanceName}.roles = v.instance.instanceRoles;
+            }) instances);
+          }) grouped;
+        }
+      ];
+    };
+    default = { };
+  };
+  options._allMachines = mkOption {
+    internal = true;
+    type = types.raw;
+    default = lib.mapAttrs (machineName: _: {
+      # This is the list of nixosModules for each machine
+      machineImports = lib.foldlAttrs (
+        acc: _module_ident: serviceModule:
+        acc ++ [ serviceModule.result.final.${machineName}.nixosModule or { } ]
+      ) [ ] config._services.mappedServices;
+    }) inventory.machines or { };
+  };
+
+  config = {
+    clanInternals.inventoryClass.machines = config._allMachines;
+    # clanInternals.inventoryClass.distributedServices = config._services;
+
+    # Exports from distributed services
+    exports = config._services.exports;
+  };
+}

modules/clan/eval-docs.nix

@@ -1,19 +1,24 @@
 {
   pkgs,
   lib,
+  clanModule,
+  clanLib,
   clan-core,
 }:
 let
   eval = lib.evalModules {
     modules = [
-      clan-core.modules.clan.default
+      clanModule
     ];
+    specialArgs = {
+      self = clan-core;
+    };
   };
 
   evalDocs = pkgs.nixosOptionsDoc {
     options = eval.options;
     warningsAreErrors = false;
-    transformOptions = clan-core.clanLib.docs.stripStorePathsFromDeclarations;
+    transformOptions = clanLib.docs.stripStorePathsFromDeclarations;
   };
 in
 {

modules/clan/flake-module.nix

@@ -0,0 +1,27 @@
+{ self, lib, ... }:
+let
+  clanModule = lib.modules.importApply ./default.nix { clan-core = self; };
+in
+{
+  flake.modules.clan.default = clanModule;
+  perSystem =
+    {
+      pkgs,
+      lib,
+      ...
+    }:
+    let
+      jsonDocs = import ./eval-docs.nix {
+        clan-core = self;
+        inherit
+          pkgs
+          lib
+          clanModule
+          ;
+        clanLib = self.clanLib;
+      };
+    in
+    {
+      legacyPackages.clan-options = jsonDocs.optionsJSON;
+    };
+}

modules/clan/module.nix

@@ -100,7 +100,7 @@ let
           _: machine:
           machine.extendModules {
             modules = [
-              (lib.modules.importApply ../machineModules/overridePkgs.nix {
+              (lib.modules.importApply ../../nixosModules/machineModules/overridePkgs.nix {
                 pkgs = pkgsFor.${system};
               })
             ];
@@ -167,6 +167,9 @@ in
           { ... }@args:
           let
             _class =
+              # _class was added in https://github.com/NixOS/nixpkgs/pull/395141
+              # Clan relies on it to determine which modules to load
+              # people need to use at least that version of nixpkgs
               args._class or (throw ''
                 Your version of nixpkgs is incompatible with the latest clan.
                 Please update nixpkgs input to the latest nixos-unstable or nixpkgs-unstable.
@@ -176,7 +179,7 @@ in
           in
           {
             imports = [
-              (lib.modules.importApply ../machineModules/forName.nix {
+              (lib.modules.importApply ../../nixosModules/machineModules/forName.nix {
                 inherit (config.inventory) meta;
                 inherit
                   name
@@ -216,43 +219,44 @@ in
     inherit nixosConfigurations;
     inherit darwinConfigurations;
 
-    exports = config.clanInternals.inventoryClass.distributedServices.servicesEval.config.exports;
-
     clanInternals = {
       inventoryClass =
         let
           flakeInputs = config.self.inputs;
+          # Compute the relative directory path
+          selfStr = toString config.self;
+          dirStr = toString directory;
+          relativeDirectory =
+            if selfStr == dirStr then
+              ""
+            else if lib.hasPrefix selfStr dirStr then
+              lib.removePrefix (selfStr + "/") dirStr
+            else
+              # This shouldn't happen in normal usage, but can occur when
+              # the flake is copied (e.g., in tests). Fall back to empty string.
+              "";
         in
         {
           _module.args = {
             inherit clanLib;
           };
           imports = [
-            ../inventoryClass/builder/default.nix
+            ../inventoryClass/default.nix
-            (lib.modules.importApply ../inventoryClass/service-list-from-inputs.nix {
-              inherit flakeInputs clanLib;
-            })
             {
-              inherit inventory directory;
+              inherit
+                inventory
+                directory
+                flakeInputs
+                relativeDirectory
+                ;
+              exportsModule = config.exportsModule;
             }
             (
-              let
+              { ... }:
-                clanConfig = config;
-              in
-              { config, ... }:
               {
                 staticModules = clan-core.clan.modules;
-
-                distributedServices = clanLib.inventory.mapInstances {
-                  inherit (clanConfig) inventory exportsModule;
-                  inherit flakeInputs directory;
-                  clanCoreModules = clan-core.clan.modules;
-                  prefix = [ "distributedServices" ];
-                };
-                machines = config.distributedServices.allMachines;
               }
             )
-            ../inventoryClass/inventory-introspection.nix
           ];
         };
 

modules/clan/templates.nix

@@ -1,3 +1,28 @@
+/**
+  The templates submodule
+
+  'clan.templates'
+
+  Different kinds supported:
+
+  - clan templates: 'clan.templates.clan'
+  - disko templates: 'clan.templates.disko'
+  - machine templates: 'clan.templates.machine'
+
+  A template has the form:
+
+  ```nix
+  {
+    description: string; # short summary what the template contains
+    path: path; # path to the template
+  }
+  ```
+
+  The clan API copies the template from the given 'path'
+  into a target folder. For example,
+
+  `./machines/<machine-name>` for 'machine' templates.
+*/
 {
   lib,
   ...

modules/clan/top-level-interface.nix

@@ -288,7 +288,7 @@ in
         Global information about the clan.
       '';
       type = types.deferredModuleWith {
-        staticModules = [ ../inventoryClass/meta-interface.nix ];
+        staticModules = [ ../inventoryClass/meta.nix ];
       };
       default = { };
     };

modules/flake-module.nix

@@ -0,0 +1,5 @@
+{
+  imports = [
+    ./clan/flake-module.nix
+  ];
+}

modules/inventoryClass/default.nix

@@ -0,0 +1,156 @@
+{
+  lib,
+  clanLib,
+  config,
+  ...
+}:
+let
+  inherit (lib) types mkOption;
+  submodule = m: types.submoduleWith { modules = [ m ]; };
+
+  inspectModule =
+    inputName: moduleName: module:
+    let
+      eval = clanLib.evalService {
+        modules = [ module ];
+        prefix = [
+          inputName
+          "clan"
+          "modules"
+          moduleName
+        ];
+      };
+    in
+    {
+      manifest = eval.config.manifest;
+      roles = lib.mapAttrs (_n: v: { inherit (v) description; }) eval.config.roles;
+    };
+
+  exposedInventory = lib.intersectAttrs {
+    meta = null;
+    machines = null;
+    instances = null;
+    tags = null;
+  } config.inventory;
+
+  filterAttrsRecursive' =
+    path: pred: set:
+    lib.listToAttrs (
+      lib.concatMap (
+        name:
+        let
+          v = set.${name};
+          loc = path ++ [ name ];
+        in
+        if pred loc v then
+          [
+            (lib.nameValuePair name (if lib.isAttrs v then filterAttrsRecursive' loc pred v else v))
+          ]
+        else
+          [ ]
+      ) (lib.attrNames set)
+    );
+
+  filteredInventory = filterAttrsRecursive' [ ] (
+    # Remove extraModules from serialization,
+    # identified by: prefix + pathLength + name
+    # inventory.instances.*.roles.*.extraModules
+    path: _value: !(lib.length path == 5 && ((lib.last path)) == "extraModules")
+  ) exposedInventory;
+in
+{
+  options = {
+    flakeInputs = mkOption {
+      type = types.raw;
+    };
+    exportsModule = mkOption {
+      type = types.raw;
+    };
+
+    inventory = mkOption {
+      type = types.raw;
+    };
+    inventorySerialization = mkOption {
+      type = types.raw;
+      readOnly = true;
+      default = filteredInventory;
+    };
+    directory = mkOption {
+      type = types.path;
+    };
+    relativeDirectory = mkOption {
+      type = types.str;
+      internal = true;
+      description = ''
+        The relative directory path from the flake root to the clan directory.
+        Empty string if directory equals the flake root.
+      '';
+    };
+    machines = mkOption {
+      type = types.attrsOf (submodule ({
+        options = {
+          machineImports = mkOption {
+            type = types.listOf types.raw;
+          };
+        };
+      }));
+    };
+    introspection = lib.mkOption {
+      readOnly = true;
+      # TODO: use options.inventory instead of the evaluate config attribute
+      default =
+        builtins.removeAttrs (clanLib.introspection.getPrios { options = config.inventory.options; })
+          # tags are freeformType which is not supported yet.
+          # services is removed and throws an error if accessed.
+          [
+            "tags"
+            "services"
+          ];
+    };
+
+    staticModules = lib.mkOption {
+      readOnly = true;
+      type = lib.types.raw;
+
+      apply = moduleSet: lib.mapAttrs (inspectModule "<clan-core>") moduleSet;
+    };
+    modulesPerSource = lib.mkOption {
+      # { sourceName :: { moduleName :: {} }}
+      readOnly = true;
+      type = lib.types.raw;
+      default =
+        let
+          inputsWithModules = lib.filterAttrs (_inputName: v: v ? clan.modules) config.flakeInputs;
+        in
+        lib.mapAttrs (
+          inputName: v: lib.mapAttrs (inspectModule inputName) v.clan.modules
+        ) inputsWithModules;
+    };
+    moduleSchemas = lib.mkOption {
+      # { sourceName :: { moduleName :: { roleName :: Schema }}}
+      readOnly = true;
+      type = lib.types.raw;
+      default = lib.mapAttrs (
+        _inputName: moduleSet:
+        lib.mapAttrs (
+          _moduleName: module:
+          (clanLib.evalService {
+            modules = [ module ];
+            prefix = [ ];
+          }).config.result.api.schema
+        ) moduleSet
+      ) config.modulesPerSource;
+    };
+    templatesPerSource = lib.mkOption {
+      # { sourceName :: { moduleName :: {} }}
+      readOnly = true;
+      type = lib.types.raw;
+      default =
+        let
+          inputsWithTemplates = lib.filterAttrs (_inputName: v: v ? clan.templates) config.flakeInputs;
+        in
+        lib.mapAttrs (_inputName: v: lib.mapAttrs (_n: t: t) v.clan.templates) inputsWithTemplates;
+
+    };
+  };
+}

modules/inventoryClass/inventory.nix

@@ -115,7 +115,7 @@ in
     meta = lib.mkOption {
       type = lib.types.submoduleWith {
         modules = [
-          ./meta-interface.nix
+          ./meta.nix
         ];
       };
     };
@@ -167,7 +167,7 @@ in
       '';
       type = types.submoduleWith {
         specialArgs = {
-          inherit (config) machines;
+          inherit (config) machines clanLib;
         };
         modules = [
           {
@@ -359,7 +359,7 @@ in
                                   inherit clanLib;
                                 };
                               }
-                              (import ./roles-interface.nix { })
+                              (import ./role.nix { })
                             ];
                           }
                         );

modules/inventoryClass/meta.nix

@@ -31,6 +31,20 @@ let
         Under construction, will be used for the UI
       '';
     };
+    tld = lib.mkOption {
+      type = types.strMatching "[a-z]+";
+      default = "clan";
+      example = "ccc";
+      description = ''
+        Top level domain (TLD) of the clan. It should be set to a valid, but
+        not already existing TLD.
+
+        It will be used to provide clan-internal services and resolve each host of the
+        clan with:
+
+        <hostname>.<tld>
+      '';
+    };
   };
 in
 {

modules/inventoryClass/role.nix

@@ -44,12 +44,6 @@ in
       description = ''
         List of additionally imported `.nix` expressions.
 
-        Supported types:
-
-        - **Strings**: Interpreted relative to the 'directory' passed to `lib.clan`.
-        - **Paths**: should be relative to the current file.
-        - **Any**: Nix expression must be serializable to JSON.
-
         !!! Note
             **The import only happens if the machine is part of the service or role.**
 
@@ -73,15 +67,8 @@ in
             }
             ```
       '';
-      apply = value: if lib.isString value then value else builtins.seq (builtins.toJSON value) value;
       default = [ ];
-      type = types.listOf (
+      type = types.listOf types.raw;
-        types.oneOf [
-          types.str
-          types.path
-          (types.attrsOf types.anything)
-        ]
-      );
     };
   };
 }

nixosModules/clanCore/metadata.nix

@@ -106,6 +106,14 @@ in
             # Set by the flake, so it's read-only in the machine
             readOnly = true;
           };
+          tld = lib.mkOption {
+            type = types.strMatching "[a-z]+";
+            description = ''
+              the TLD for the clan
+            '';
+            # Set by the flake, so it's read-only in the machine
+            readOnly = true;
+          };
           machine = mkOption {
             description = ''
               Settings of the machine.

nixosModules/flake-module.nix

@@ -18,7 +18,7 @@ let
         inputs.data-mesher.nixosModules.data-mesher
       ];
       config = {
-        clan.core.clanPkgs = lib.mkDefault self.packages.${pkgs.hostPlatform.system};
+        clan.core.clanPkgs = lib.mkDefault self.packages.${pkgs.stdenv.hostPlatform.system};
       };
     };
 in

nixosModules/installer/zfs-latest.nix

@@ -30,5 +30,5 @@ let
 in
 {
   # Note this might jump back and worth as kernel get added or removed.
-  boot.kernelPackages = lib.mkIf (lib.meta.availableOn pkgs.hostPlatform pkgs.zfs) latestKernelPackage;
+  boot.kernelPackages = lib.mkIf (lib.meta.availableOn pkgs.stdenv.hostPlatform pkgs.zfs) latestKernelPackage;
 }

nixosModules/machineModules/forName.nix

@@ -3,6 +3,7 @@
   directory,
   meta,
 }:
+# The following is a nixos/darwin module
 {
   _class,
   lib,
@@ -20,7 +21,7 @@
   );
 
   clan.core.settings = {
-    inherit (meta) name icon;
+    inherit (meta) name icon tld;
     inherit directory;
     machine = {
       inherit name;