diff --git a/.gitignore b/.gitignore
index c35a3d7..3728fbb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@ result/
 public/
 resources/
 .hugo_build.lock
+.helix/
diff --git a/shell.nix b/shell.nix
index ba73ad6..ff6183e 100644
--- a/shell.nix
+++ b/shell.nix
@@ -5,6 +5,9 @@ pkgs.mkShell {
   packages = with pkgs; [
     nixfmt-rfc-style
     nil
+    ltex-ls
+    proselint
+    mdformat
   ];
 
   nativeBuildInputs = with pkgs; [