{
  config,
  lib,
  pkgs,
  ...
}:
{
  home.packages = with pkgs; [
    typescript-language-server
    vtsls
    biome
  ];

  home.sessionVariables = {
    NO_UPDATE_NOTIFIER = "1"; # stop npm update-notifier
  };

  programs.bun = {
    enable = true;
    settings = {
      run = {
        bun = true;
        silent = true;
      };
      env = false; # don't load .envrc; handled by direnv
      install = {
        prefer = "offline";
        globalDir = "${config.xdg.stateHome}/bun/install/global";
        globalBinDir = "${config.xdg.stateHome}/bun/bin";
        cache = {
          dir = "${config.xdg.cacheHome}/bun/";
        };
      };
    };
  };
  home.sessionPath = lib.mkAfter [
    config.programs.bun.settings.install.globalBinDir
  ];

  programs.emacs.extraPackages =
    epkgs:
    (with epkgs; [
      (treesit-grammars.with-grammars (
        grammars: with grammars; [
          tree-sitter-jsdoc
          tree-sitter-tsx
          tree-sitter-typescript
          tree-sitter-javascript
        ]
      ))
    ]);

  programs.zed-editor = {
    extensions = [
      "biome"
    ];
    userSettings = {
      lsp.biome.settings.require_config_file = true;
      languages =
        let
          justFormatWithBiome = {
            formatter.language_server.name = "biome";
          };
          biomeFormattedLanguages = lib.genAttrs [
            "CSS"
            "HTML"
            "JSON"
            "JSONC"
          ] (lib.const justFormatWithBiome);
        in
        biomeFormattedLanguages
        // rec {
          TypeScript = {
            formatter.language_server.name = "biome";
            code_actions_on_format = {
              "source.fixAll.biome" = true;
              "source.organizeImports.biome" = true;
            };
          };
          TSX = TypeScript;

          JavaScript = TypeScript;
        };
    };
  };

  home.shellAliases = {
    bn = "bun";
    bni = "bun install";
    bna = "bun add";
    bnad = "bun add --dev";
    bnr = "bun run";
    bnu = "bun update";
    bnrm = "bun remove";
    bnd = "bun dev";
    bnp = "bun pm";
    bnl = "bun pm ls";
    bnt = "bun test";
    bntw = "bun test --watch";
    bnx = "bunx";

    np = "npm";
    npi = "npm install";
    npl = "npm ls";
    npr = "npm run";
    npb = "npm run build";
    nprb = "npm run build";
    npa = "npm install --save";
    npad = "npm install --save-dev";
    npd = "npm uninstall";
    npt = "npm test";
    npup = "npm update";
    nppr = "npm prune";
    npprp = "npm prune --production";
    npli = "npm link";
    npul = "npm unlink";
  };

  programs.git.attributes = [
    "*.lockb diff=lockb"
  ];
  programs.git.settings."diff.lockb" = {
    textconv = "bun";
    binary = true;
  };

  xdg.configFile."npm/config".text = ''
    prefix=''${HOME}/.local
    cache=${config.xdg.cacheHome}/npm/
    sign-git-tag=true
    rebuild-bundle=false
    update-notifier=false
    registry=https://registry.npmjs.org/
    @jsr:registry=https://npm.jsr.io
  '';
}