diff --git a/.helix/languages.toml b/.helix/languages.toml
new file mode 100644
index 0000000..93560f9
--- /dev/null
+++ b/.helix/languages.toml
@@ -0,0 +1,5 @@
+[[language]]
+name = "go"
+auto-format = true
+formatter = { command = "gofumpt" }
+
diff --git a/flake.lock b/flake.lock
index ef63308..67407b9 100644
--- a/flake.lock
+++ b/flake.lock
@@ -13,20 +13,25 @@
         "type": "github"
       },
       "original": {
-        "id": "flake-utils",
-        "type": "indirect"
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
       }
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 0,
-        "narHash": "sha256-WFZDy4bG2RkkCQloIEG8BXEvzyKklFVJbAismOJsIp4=",
-        "path": "/nix/store/c77dsgfxjywplw8bk8s8jlkdsr7a1bi9-source",
-        "type": "path"
+        "lastModified": 1749285348,
+        "narHash": "sha256-frdhQvPbmDYaScPFiCnfdh3B/Vh81Uuoo0w5TkWmmjU=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "3e3afe5174c561dee0df6f2c2b2236990146329f",
+        "type": "github"
       },
       "original": {
-        "id": "nixpkgs",
-        "type": "indirect"
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
       }
     },
     "root": {
diff --git a/flake.nix b/flake.nix
index 36a545e..f540f73 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,27 +1,53 @@
 {
-  outputs = {
-    self,
-    nixpkgs,
-    flake-utils,
-    systems,
-  }:
-    flake-utils.lib.eachSystem (import systems)
-    (system: let
-      pkgs = import nixpkgs {
-        inherit system;
-      };
-    in {
-      devShells.default = pkgs.mkShell {
-        buildInputs = with pkgs; [
-          glibc.static
-          go
-          gofumpt
-          golangci-lint
-          gopls
-          gotools
-          go-tools
-          sqlite-interactive
-        ];
-      };
-    });
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs =
+    {
+      self,
+      nixpkgs,
+      flake-utils,
+      systems,
+    }:
+    flake-utils.lib.eachSystem (import systems) (
+      system:
+      let
+        pkgs = import nixpkgs {
+          inherit system;
+        };
+      in
+      {
+        devShells = {
+          default = pkgs.mkShell {
+            buildInputs = with pkgs; [
+              glibc.static
+              go
+              gofumpt
+              golangci-lint
+              gopls
+              gotools
+              go-tools
+              sqlite-interactive
+            ];
+          };
+
+          helix = pkgs.mkShell {
+            packages = with pkgs; [
+              marksman # markdown
+              nodePackages.prettier # formatting for markdown and yaml
+              taplo # toml
+              bash-language-server
+              shellcheck # dependency for bash-ls
+              shfmt # dependency for bash-ls
+              yaml-language-server
+              treefmt # formatter multiplexer
+              nil # nix ls
+              nixfmt-rfc-style # formatter for nix
+            ];
+          };
+        };
+      }
+    );
 }
diff --git a/treefmt.toml b/treefmt.toml
new file mode 100644
index 0000000..8446a25
--- /dev/null
+++ b/treefmt.toml
@@ -0,0 +1,14 @@
+formatters = ["gofumpt", "prettier", "nixfmt"]
+
+[formatter.gofumpt]
+command = "gofumpt"
+includes = [ "*.go" ]
+
+[formatter.prettier]
+command = "prettier"
+includes = [ "*.md", "*.yaml" ]
+
+[formatter.nixfmt]
+command = "nixfmt"
+includes = [ "*.nix" ]
+