feat: esphome updates

hosts/nb/users/codex-cli.nix

@@ -0,0 +1,49 @@
+{ config, lib, pkgs, ... }:
+let
+  user = "dominik";
+  home = "/home/${user}";
+  npmPrefix = "${home}/.npm-global";
+  node = pkgs.nodejs; # or pkgs.nodejs_20
+in {
+  home-manager.users.dominik = { lib, pkgs, ... }: {
+    home.packages = with pkgs; [
+      node
+      gnutar     # provides `tar`
+      gzip       # provides `gzip` used by tar
+      unzip  
+      python314  # useful for codex model use
+      jq         # useful for JSON processing
+    ];
+
+    # Ensure ~/.npmrc with a user prefix (no sudo needed)
+    home.file.".npmrc"= {
+      text = ''
+        prefix=${npmPrefix}
+      '';
+      force  = true;
+    };
+
+
+    # Ensure the npm bin dir is on PATH for all shells
+    home.sessionPath = [
+      "${npmPrefix}/bin"
+    ];
+
+    # Nice-to-have: visible variables in the shell
+    home.sessionVariables = {
+      NPM_CONFIG_PREFIX = npmPrefix;
+    };
+
+    # Auto-install @openai/codex if it's not already there
+    # (idempotent on each `home-manager switch`)
+    home.activation.installCodexCli = lib.hm.dag.entryAfter [ "writeBoundary" ] ''
+      export PATH=${node}/bin:${pkgs.gnutar}/bin:${pkgs.gzip}/bin:${pkgs.unzip}/bin:${pkgs.curl}/bin:$PATH
+      mkdir -p ${npmPrefix}
+      if ! command -v codex >/dev/null 2>&1; then
+        echo "Installing @openai/codex globally..."
+        # --global uses prefix from ~/.npmrc; PATH has node for postinstall
+        ${node}/bin/npm install -g @openai/codex
+      fi
+    '';
+  };
+}