{ ... }:
{
  # https://mynixos.com/home-manager/option/programs.ghostty
  programs.ghostty = {
    enable = true;
    enableFishIntegration = true;

    # custom palette ported verbatim from the previous alacritty config
    # (poimandres-ish). lives in ~/.config/ghostty/themes/poimandres and is
    # selected by `theme = "poimandres"` below.
    themes.poimandres = {
      palette = [
        "0=#1b1e28"
        "1=#d0679d"
        "2=#5de4c7"
        "3=#fffac2"
        "4=#435c89"
        "5=#fcc5e9"
        "6=#add7ff"
        "7=#ffffff"
        "8=#a6accd"
        "9=#d0679d"
        "10=#5de4c7"
        "11=#fffac2"
        "12=#add7ff"
        "13=#fae4fc"
        "14=#89ddff"
        "15=#ffffff"
      ];
      background = "131621";
      foreground = "a6accd";
      cursor-color = "a6accd";
      cursor-text = "131621";
      selection-background = "303340";
      selection-foreground = "a6accd";
    };

    settings = {
      theme = "poimandres";

      # font
      font-family = "JetBrainsMono Nerd Font";
      font-size = 12;

      # window
      window-decoration = false;
      window-padding-x = 10;
      window-padding-y = 10;
      window-width = 80;
      window-height = 40;

      # semi-transparent background
      background-opacity = 0.90;

      # cursor
      cursor-style = "underline";

      # keep one daemon alive so subsequent launches (e.g. niri Mod+T) are
      # instant instead of paying GTK + wgpu init each time. relies on the
      # dbus-activated systemd user service that the HM module wires up.
      gtk-single-instance = true;
    };
  };

  home.sessionVariables = {
    TERMINAL = "ghostty";
  };
}