{
  pkgs,
  lib,
  config,
  ...
}:
let
  toml = (pkgs.formats.toml { }).generate;

  pal = config.rice.palette.hex;
  ui = config.rice.roles pal;

  helixConfig = toml "config.toml" {
    theme = "nix-rice";
    editor = {
      bufferline = "multiple";
      cursorline = true;
      true-color = true;
      cursor-shape = {
        insert = "block";
        normal = "block";
        select = "block";
      };
      statusline.left = [
        "mode"
        "spinner"
        "version-control"
        "file-name"
        "file-modification-indicator"
      ];
      lsp.display-messages = true;
    };
  };

  helixLanguages = toml "languages.toml" {
    language = [
      {
        name = "rust";
        language-servers = [ "rust-analyzer" ];
      }
      {
        name = "nix";
        language-servers = [ "nil" ];
        file-types = [ "nix" ];
        auto-format = true;
        formatter = {
          command = "nixfmt";
        };
      }
    ];

    language-server = {
      qmlls = {
        command = "qmlls";
        args = [ "-E" ];
      };

      nil = {
        command = "nil";
      };

      rust-analyzer = {
        config = {
          cargo.buildScripts.enable = true;
          procMacro.enable = true;
          check.command = "clippy";
        };
      };
    };
  };

  helixTheme = toml "nix-rice.toml" {
    # === Syntax (palette) ===
    "attribute" = pal.bright.cyan;
    "keyword" = {
      fg = pal.normal.red;
    };
    "keyword.directive" = pal.normal.red;
    "namespace" = pal.bright.cyan;
    "punctuation" = pal.bright.yellow;
    "punctuation.delimiter" = pal.bright.yellow;
    "operator" = pal.bright.magenta;
    "special" = pal.normal.magenta;
    "variable.other.member" = pal.bright.blue;
    "variable" = pal.util.fg;
    "variable.builtin" = pal.bright.yellow;
    "variable.parameter" = pal.bright.white;
    "type" = pal.normal.yellow;
    "type.builtin" = pal.normal.yellow;
    "constructor" = {
      fg = pal.bright.magenta;
      modifiers = [ "bold" ];
    };
    "function" = {
      fg = pal.normal.green;
      modifiers = [ "bold" ];
    };
    "function.macro" = pal.bright.cyan;
    "function.builtin" = pal.normal.yellow;
    "tag" = pal.normal.red;
    "comment" = {
      fg = pal.normal.magenta;
      modifiers = [ "italic" ];
    };
    "constant" = {
      fg = pal.bright.magenta;
    };
    "constant.builtin" = {
      fg = pal.bright.magenta;
      modifiers = [ "bold" ];
    };
    "string" = pal.normal.green;
    "constant.numeric" = pal.bright.magenta;
    "constant.character.escape" = {
      fg = pal.bright.white;
      modifiers = [ "bold" ];
    };
    "label" = pal.bright.cyan;
    "module" = pal.bright.cyan;

    # === Markup (palette) ===
    "markup.heading" = pal.bright.cyan;
    "markup.bold" = {
      modifiers = [ "bold" ];
    };
    "markup.italic" = {
      modifiers = [ "italic" ];
    };
    "markup.strikethrough" = {
      modifiers = [ "crossed_out" ];
    };
    "markup.link.url" = {
      fg = pal.bright.green;
      modifiers = [ "underlined" ];
    };
    "markup.link.text" = pal.bright.red;
    "markup.raw" = pal.bright.red;

    # === Diff / diagnostics (roles) ===
    "diff.plus" = ui.added;
    "diff.delta" = ui.changed;
    "diff.minus" = ui.removed;
    "warning" = ui.warning;
    "error" = ui.error;
    "info" = ui.info;
    "hint" = ui.hint;
    "diagnostic.warning" = {
      underline = {
        color = ui.warning;
        style = "curl";
      };
    };
    "diagnostic.error" = {
      underline = {
        color = ui.error;
        style = "curl";
      };
    };
    "diagnostic.info" = {
      underline = {
        color = ui.info;
        style = "curl";
      };
    };
    "diagnostic.hint" = {
      underline = {
        color = ui.hint;
        style = "curl";
      };
    };

    # === UI (roles) ===
    "ui.background" = {
      bg = ui.bg;
    };
    "ui.text" = {
      fg = ui.fg;
    };
    "ui.text.focus" = {
      fg = ui.fg;
    };
    "ui.linenr" = {
      fg = pal.normal.cyan;
    };
    "ui.linenr.selected" = {
      fg = pal.normal.yellow;
      modifiers = [ "bold" ];
    };
    "ui.cursorline" = {
      bg = ui.surface;
    };
    "ui.statusline" = {
      fg = ui.fg;
      bg = ui.overlay;
    };
    "ui.statusline.normal" = {
      fg = ui.fg;
      bg = ui.overlay;
    };
    "ui.statusline.insert" = {
      fg = ui.fg;
      bg = ui.primary;
    };
    "ui.statusline.select" = {
      fg = ui.fg;
      bg = ui.highlight;
    };
    "ui.statusline.inactive" = {
      fg = ui.muted;
      bg = ui.surface;
    };
    "ui.popup" = {
      bg = ui.surface;
    };
    "ui.window" = {
      bg = ui.surface;
    };
    "ui.help" = {
      bg = ui.surface;
      fg = ui.fg;
    };
    "ui.selection" = {
      bg = ui.highlight;
    };
    "ui.selection.primary" = {
      modifiers = [ "reversed" ];
    };
    "ui.cursor.primary" = {
      bg = ui.muted;
      fg = ui.surface;
    };
    "ui.cursor.match" = {
      bg = ui.accent;
    };
    "ui.menu" = {
      fg = ui.fg;
      bg = ui.overlay;
    };
    "ui.menu.selected" = {
      fg = ui.overlay;
      bg = ui.secondary;
      modifiers = [ "bold" ];
    };
    "ui.virtual.whitespace" = ui.overlay;
    "ui.virtual.ruler" = {
      bg = ui.surface;
    };
    "ui.virtual.inlay-hint" = {
      fg = pal.normal.magenta;
    };
  };

  helixConfigDir = pkgs.runCommand "helix-xdg" { } ''
    mkdir -p $out/helix/themes
    cp ${helixConfig} $out/helix/config.toml
    cp ${helixLanguages} $out/helix/languages.toml
    cp ${helixTheme} $out/helix/themes/nix-rice.toml
  '';

  helixWrapped = pkgs.symlinkJoin {
    name = "helix";
    paths = [ pkgs.helix ];
    nativeBuildInputs = [ pkgs.makeWrapper ];
    postBuild = ''
      wrapProgram $out/bin/hx \
        --set XDG_CONFIG_HOME "${helixConfigDir}"
    '';
    meta.mainProgram = "hx";
  };
in
scope "apps.editor" <| helixWrapped