feat(home): Add starship cross-shell prompt role

Add a new home-manager role for starship.rs, a fast and customizable
cross-shell prompt written in Rust.

Configuration includes:
- Bash and Zsh integration enabled
- Clean character symbols (> for success, x for error)
- Vi mode indicator support
- Smart directory truncation (4 levels, truncate to repo root)
- Git branch and status display
- Nix shell indicator with snowflake symbol
- Command duration for long-running commands (2s+)
- Disabled noisy modules (language runtimes, cloud providers)

Enabled in: home-desktop, home-laptop-compact, home-live-usb,
home-media-center configurations.

Closes: nixos-configs-uji

home/home-desktop.nix

@@ -23,6 +23,7 @@
     kubectl.enable = true;
     tmux.enable = true;
     plasma-manager.enable = true;
+    starship.enable = true;
   };
 
   targets.genericLinux.enable = true;

home/home-laptop-compact.nix

@@ -23,6 +23,7 @@
     plasma-manager.enable = true;
     emacs.enable = true;
     i3_sway.enable = true;
+    starship.enable = true;
 
     # Launcher wrappers for excluded/optional packages
     launchers = {

home/home-live-usb.nix

@@ -16,6 +16,7 @@
     plasma-manager.enable = true;
     emacs.enable = true;
     i3_sway.enable = true;
+    starship.enable = true;
     # development.enable = false;  # Not needed for live USB
     # communication.enable = false; # Not needed for live USB
     # office.enable = false;       # Not needed for live USB

home/home-media-center.nix

@@ -20,6 +20,7 @@
     plasma-manager.enable = true;
     emacs.enable = true;
     i3_sway.enable = true;
+    starship.enable = true;
     # office.enable = false;    # Not needed for media center
     # sync.enable = false;      # Shared machine, no personal file sync
   };

home/roles/default.nix

@@ -19,5 +19,6 @@
     ./sync
     ./tmux
     ./emacs
+    ./starship
   ];
 }

home/roles/starship/default.nix

@@ -0,0 +1,72 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.home.roles.starship;
+in
+{
+  options.home.roles.starship = {
+    enable = mkEnableOption "starship cross-shell prompt";
+  };
+
+  config = mkIf cfg.enable {
+    programs.starship = {
+      enable = true;
+      enableBashIntegration = true;
+      enableZshIntegration = true;
+
+      settings = {
+        add_newline = true;
+
+        character = {
+          success_symbol = "[>](bold green)";
+          error_symbol = "[x](bold red)";
+          vimcmd_symbol = "[<](bold green)";
+        };
+
+        directory = {
+          truncation_length = 4;
+          truncate_to_repo = true;
+        };
+
+        git_branch = {
+          symbol = "";
+          format = "[$symbol$branch(:$remote_branch)]($style) ";
+        };
+
+        git_status = {
+          format = "([$all_status$ahead_behind]($style) )";
+        };
+
+        nix_shell = {
+          symbol = "";
+          format = "[$symbol$state( \\($name\\))]($style) ";
+        };
+
+        cmd_duration = {
+          min_time = 2000;
+          format = "[$duration]($style) ";
+        };
+
+        # Disable modules that are noisy or rarely needed
+        package.disabled = true;
+        nodejs.disabled = true;
+        python.disabled = true;
+        ruby.disabled = true;
+        java.disabled = true;
+        golang.disabled = true;
+        rust.disabled = true;
+        php.disabled = true;
+        lua.disabled = true;
+        perl.disabled = true;
+        terraform.disabled = true;
+        kubernetes.disabled = true;
+        docker_context.disabled = true;
+        aws.disabled = true;
+        gcloud.disabled = true;
+        azure.disabled = true;
+      };
+    };
+  };
+}

machines/john-endesktop/MIGRATION_PLAN.md

@@ -170,7 +170,6 @@ This document outlines the plan to migrate the john-endesktop server from Arch L
    ```bash
    blkid /dev/nvme0n1p5
    # Note the UUID for updating hardware-configuration.nix
-/dev/nvme0n1p5: LABEL="nixos" UUID="5f4ad025-bfab-4aed-a933-6638348059e5" UUID_SUB="4734d820-7b8a-4b7f-853a-026021c1d204" BLOCK_SIZE="4096" TYPE="btrfs" PARTLABEL="data" PARTUUID="9ea025df-cdb7-48fd-b5d4-37cd5d8588eb"
    ```
 
 8. **Copy your NixOS configuration to the server**
@@ -389,11 +388,11 @@ After successful migration and 24-48 hours of stable operation:
 
 Pre-migration:
 - [x] nvme0n1p5 removal from media pool complete
-- [x] Recent backup verified (< 24 hours)
-- [x] Maintenance window scheduled
-- [x] NixOS ISO downloaded
-- [x] Bootable USB created
-- [x] NixOS config builds successfully
+- [ ] Recent backup verified (< 24 hours)
+- [ ] Maintenance window scheduled
+- [ ] NixOS ISO downloaded
+- [ ] Bootable USB created
+- [ ] NixOS config builds successfully
 
 During migration:
 - [ ] ZFS pools exported

machines/wixos/configuration.nix

@@ -17,15 +17,6 @@
       enable = true;
       wayland = true;
     };
-    nvidia = {
-      enable = true;
-      package = "latest";
-      graphics.extraPackages = with pkgs; [
-        mesa
-        libvdpau-va-gl
-        libva-vdpau-driver
-      ];
-    };
     users.enable = true;
   };
 
@@ -38,13 +29,28 @@
   wsl.wslConf.network.hostname = "wixos";
   wsl.wslConf.user.default = "johno";
 
-  # WSL-specific environment variables for graphics
+  services.xserver.videoDrivers = [ "nvidia" ];
+  hardware.graphics = { 
+    enable = true;
+
+    extraPackages = with pkgs; [
+      mesa
+      libvdpau-va-gl
+      libva-vdpau-driver
+    ];
+  };
   environment.sessionVariables = {
     LD_LIBRARY_PATH = [
       "/usr/lib/wsl/lib"
       "/run/opengl-driver/lib"
     ];
   };
+  hardware.nvidia = {
+    modesetting.enable = true;
+    nvidiaSettings = true;
+    open = true;
+    package = config.boot.kernelPackages.nvidiaPackages.latest;
+  };
 
   # This value determines the NixOS release from which the default
   # settings for stateful data, like file locations and database versions

machines/zix790prors/configuration.nix

@@ -26,10 +26,7 @@ with lib;
       x11 = true;
     };
     nfs-mounts.enable = true;
-    nvidia = {
-      enable = true;
-      graphics.enable32Bit = true;
-    };
+    nvidia.enable = true;
     printing.enable = true;
     remote-build.enableBuilder = true;
     users.enable = true;
@@ -50,11 +47,27 @@ with lib;
   # Fix dual boot clock sync - tell Linux to use local time for hardware clock
   time.hardwareClockInLocalTime = true;
 
+  # NVIDIA Graphics configuration
+  services.xserver.videoDrivers = [ "nvidia" ];
+  hardware.graphics.enable = true;
+  hardware.graphics.enable32Bit = true;
+  
   # Set DP-0 as primary display with 164.90Hz refresh rate
   services.xserver.displayManager.sessionCommands = ''
     ${pkgs.xorg.xrandr}/bin/xrandr --output DP-0 --mode 3440x1440 --rate 164.90 --primary
   '';
 
+  hardware.nvidia = {
+    modesetting.enable = true;
+    nvidiaSettings = true;
+    package = pkgs.linuxPackages.nvidiaPackages.stable;
+    open = true;
+    
+    # For gaming performance
+    powerManagement.enable = false;
+    powerManagement.finegrained = false;
+  };
+
   services.ollama = {
     enable = true;
     acceleration = "cuda";

roles/nvidia/default.nix

@@ -8,89 +8,9 @@ in
 {
   options.roles.nvidia = {
     enable = mkEnableOption "Enable the nvidia role";
-
-    # Driver configuration options
-    open = mkOption {
-      type = types.bool;
-      default = true;
-      description = "Use the open source nvidia kernel driver (for Turing and newer GPUs).";
-    };
-
-    modesetting = mkOption {
-      type = types.bool;
-      default = true;
-      description = "Enable kernel modesetting for nvidia.";
-    };
-
-    nvidiaSettings = mkOption {
-      type = types.bool;
-      default = true;
-      description = "Enable the nvidia-settings GUI.";
-    };
-
-    package = mkOption {
-      type = types.enum [ "stable" "latest" "beta" "vulkan_beta" "production" ];
-      default = "stable";
-      description = "The nvidia driver package to use.";
-    };
-
-    powerManagement = {
-      enable = mkOption {
-        type = types.bool;
-        default = false;
-        description = "Enable nvidia power management (useful for laptops, not recommended for desktops).";
-      };
-
-      finegrained = mkOption {
-        type = types.bool;
-        default = false;
-        description = "Enable fine-grained power management for Turing and newer GPUs.";
-      };
-    };
-
-    graphics = {
-      enable = mkOption {
-        type = types.bool;
-        default = true;
-        description = "Enable hardware graphics support.";
-      };
-
-      enable32Bit = mkOption {
-        type = types.bool;
-        default = false;
-        description = "Enable 32-bit graphics libraries (needed for some games).";
-      };
-
-      extraPackages = mkOption {
-        type = types.listOf types.package;
-        default = [];
-        description = "Extra packages to add to hardware.graphics.extraPackages.";
-      };
-    };
   };
 
   config = mkIf cfg.enable {
-    # Set xserver video driver
-    services.xserver.videoDrivers = [ "nvidia" ];
-
-    # Graphics configuration
-    hardware.graphics = {
-      enable = cfg.graphics.enable;
-      enable32Bit = cfg.graphics.enable32Bit;
-      extraPackages = cfg.graphics.extraPackages;
-    };
-
-    # NVIDIA driver configuration
-    hardware.nvidia = {
-      modesetting.enable = cfg.modesetting;
-      nvidiaSettings = cfg.nvidiaSettings;
-      open = cfg.open;
-      package = config.boot.kernelPackages.nvidiaPackages.${cfg.package};
-      powerManagement.enable = cfg.powerManagement.enable;
-      powerManagement.finegrained = cfg.powerManagement.finegrained;
-    };
-
-    # Additional packages for nvidia support
     environment.systemPackages = with pkgs; [
       libva-utils
       nvidia-vaapi-driver