feat(nodejs): add fnm node version manager

home/hosts/work/default.nix

@@ -37,6 +37,7 @@
 
   ai-tools = {
     claude-code.enable = true;
+    fabric.enable = true;
     tirith.enable = true;
     opencode.enable = true;
   };
@@ -80,7 +81,10 @@
   taskwarrior.enable = true;
   terminal.enable = true;
   infra.enable = true;
-  nodejs.enable = true;
+  nodejs = {
+    enable = true;
+    fnm.enable = true;
+  };
   secrets.enable = true;
   secrets.vault.enable = true;
   ticketing.enable = true;

home/modules/ai-tools/default.nix

@@ -30,6 +30,7 @@ in
 
   imports = [
     ./claude-code.nix
+    ./fabric.nix
     ./opencode.nix
     ./skills.nix
     ./tirith.nix

home/modules/ai-tools/fabric.nix

@@ -0,0 +1,16 @@
+{
+  lib,
+  config,
+  pkgs,
+  ...
+}:
+
+{
+  options.ai-tools.fabric = {
+    enable = lib.mkEnableOption "fabric";
+  };
+
+  config = lib.mkIf config.ai-tools.fabric.enable {
+    home.packages = [ pkgs.fabric-ai ];
+  };
+}

home/modules/browser/firefox.nix

@@ -10,7 +10,7 @@
   config = lib.mkIf (config.browser.primary == "firefox" || config.browser.secondary == "firefox") {
     programs.firefox = {
       enable = true;
-      configPath = "${config.xdg.configHome}/mozilla/firefox";
+      configPath = ".mozilla/firefox";
     }
     // (import ./firefox-base.nix {
       inherit

home/modules/nodejs/default.nix

@@ -13,16 +13,24 @@ in
   options.nodejs = {
     enable = lib.mkEnableOption "Node.js";
     package = lib.mkPackageOption pkgs "nodejs_24" { };
+    fnm.enable = lib.mkEnableOption "fnm";
   };
 
   config = lib.mkIf cfg.enable {
-    home.packages = with pkgs; [
+    home.packages =
+      with pkgs;
+      [
         cfg.package
         pnpm
         yarn
         biome
         tsx
-    ];
+      ]
+      ++ lib.optional cfg.fnm.enable fnm;
+
+    programs.bash.initExtra = lib.mkIf cfg.fnm.enable ''
+      eval "$(fnm env --use-on-cd --shell bash)"
+    '';
 
     programs.npm = {
       inherit (cfg) enable package;