local-ai: init module (#6718)

modules/misc/news/2025/10/2025-10-31_12-00-00.nix

@@ -0,0 +1,9 @@
+{
+  time = "2025-10-31T12:00:00+00:00";
+  condition = true;
+  message = ''
+    services.local-ai: new module
+
+    Added LocalAI, a free, Open Source OpenAI alternative.
+  '';
+}

modules/services/local-ai.nix

@@ -0,0 +1,48 @@
+{
+  pkgs,
+  config,
+  lib,
+  ...
+}:
+
+let
+  inherit (lib) types;
+  cfg = config.services.local-ai;
+in
+{
+  meta.maintainers = [ lib.maintainers.ipsavitsky ];
+
+  options.services.local-ai = {
+    enable = lib.mkEnableOption "LocalAI is the free, Open Source OpenAI alternative.";
+
+    package = lib.mkPackageOption pkgs "local-ai" { };
+
+    environment = lib.mkOption {
+      type = types.attrsOf types.string;
+      default = { };
+      description = ''
+        Additional environment passed to local-ai service. Used to configure local-ai
+
+        See <https://localai.io/basics> for available options.
+      '';
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    systemd.user.services.local-ai = {
+      Unit = {
+        Description = "Server for local large language models";
+        After = [ "network.target" ];
+      };
+
+      Service = {
+        ExecStart = lib.getExe cfg.package;
+        Environment = lib.mapAttrsToList (key: val: "${key}=${val}") cfg.environment;
+      };
+
+      Install = {
+        WantedBy = [ "default.target" ];
+      };
+    };
+  };
+}