Fix harper-ls

.envrc

@@ -1,3 +1,3 @@
-use flake
 watch_file ./home
 watch_file ./languages
+use flake

languages/en-us.nix

@@ -14,24 +14,26 @@ let
     file = builtins.toFile valeDictionary.filename valeDictionary.content;
   };
   typosConfig = {
-    default.extendWords =
-      # dictionary:
-      builtins.listToAttrs (
-        builtins.map (x: {
-          name = x;
-          value = x;
-        }) dictionary
-      );
+    default.extendWords = builtins.listToAttrs (
+      builtins.map (x: {
+        name = x;
+        value = x;
+      }) dictionary
+    );
   };
   typosConfigFile = tomlFormatter.generate "_typos.toml" typosConfig;
 in
 {
   helix.language-server = {
+    # https://ltex-plus.github.io/ltex-plus/supported-languages.html
     ltex-ls-plus = {
       command = "${pkgs.ltex-ls-plus}/bin/ltex-ls-plus";
       config.ltex.dictionary.en-US = dictionary;
     };
+    # https://vale.sh/docs/formats/code
     vale-ls.command = "${pkgs.vale-ls}/bin/vale-ls";
+    # https://writewithharper.com/docs/integrations/language-server#Supported-Languages
+    harper-ls.command = "${pkgs.harper}/bin/harper-ls";
   };
   treefmt.programs.typos = {
     enable = true;