feat: initial commit.

flake.nix

@@ -0,0 +1,83 @@
+{
+  description = "A dev environment";
+
+  inputs = {
+    # nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.05";
+    nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+
+    flake-parts.url = "github:hercules-ci/flake-parts";
+    process-compose-flake.url = "github:Platonic-Systems/process-compose-flake";
+    treefmt-nix.url = "github:numtide/treefmt-nix";
+    treefmt-nix.inputs.nixpkgs.follows = "nixpkgs";
+  };
+
+  outputs =
+    inputs@{ self
+    , flake-parts
+    , nixpkgs
+    , nixpkgs-unstable
+    , process-compose-flake
+    , treefmt-nix
+    }:
+    flake-parts.lib.mkFlake { inherit inputs; } {
+      imports = [
+        inputs.treefmt-nix.flakeModule
+        # inputs.process-compose-flake.flakeModule
+      ];
+      systems = [ "x86_64-linux" ];
+
+      perSystem =
+        { pkgs, system, inputs', ... }: {
+          _module.args.pkgs = import nixpkgs {
+            inherit system;
+            config.allowUnfree = true;
+
+            overlays = [
+              (final: prev: { unstable = inputs'.nixpkgs-unstable.legacyPackages; })
+            ];
+          };
+
+          treefmt = {
+            # Used to find the project root
+            projectRootFile = "flake.nix";
+            settings.global.excludes = [
+              ".direnv/**"
+              ".jj/**"
+              ".env"
+              ".envrc"
+              ".env.local"
+            ];
+
+
+            # Format nix files
+            programs.nixpkgs-fmt.enable = true;
+            programs.deadnix.enable = true;
+
+            # Format js, json, and yaml files
+            programs.prettier.enable = true;
+            settings.formatter.prettier =
+              {
+                excludes = [
+                  "public/**"
+                  "resources/js/modernizr.js"
+                  "storage/app/caniuse.json"
+                  "*.md"
+                ];
+              };
+          };
+
+          devShells.default = pkgs.mkShell
+            {
+              buildInputs = with pkgs; [
+                # TODO: Packages go here.
+                unstable.nushell
+
+                # IDE
+                unstable.helix
+                typescript-language-server
+                vscode-langservers-extracted
+              ];
+            };
+        };
+    };
+}