basic coding config

modules/base.nix

@@ -1,10 +1,13 @@
 {
   lib,
+  outputs,
   pkgs,
   ...
-}: {
+}:
+{
   nixpkgs = {
     overlays = [
+      outputs.overlays.stable-packages
     ];
     config = {
       allowUnfree = true;
@@ -15,7 +18,10 @@
   nix = {
     package = lib.mkDefault pkgs.nix;
     settings = {
-      experimental-features = ["nix-command" "flakes"];
+      experimental-features = [
+        "nix-command"
+        "flakes"
+      ];
       warn-dirty = false;
     };
   };

modules/coding/default.nix

@@ -0,0 +1,93 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+with lib;
+let
+  goCfg = config.features.coding.go;
+  nixCfg = config.features.coding.nix;
+  pythonCfg = config.features.coding.python;
+in
+{
+  options.features.coding = {
+    go = {
+      enable = mkEnableOption "enable Go development environment";
+      packageSet = mkOption {
+        type = types.str;
+        default = "default";
+        description = "Which nixpkgs variant to use for Golang";
+      };
+      additionalPackages = mkOption {
+        type = types.listOf types.str;
+        example = [
+          delve
+          go-outline
+        ];
+      };
+
+    };
+    python = {
+      enable = mkEnableOption "enable Python development environment";
+      additionalPackages = mkOption {
+        type = types.listOf types.str;
+        example = [
+          "requests"
+          "pandas"
+        ];
+      };
+    };
+    nix = {
+      enable = mkEnableOption "enable Nix development environment";
+    };
+  };
+
+  config =
+    let
+      selectPkgs = packageSet: if packageSet == "default" then pkgs else pkgs.${packageSet};
+    in
+    mkMerge [
+      (mkIf goCfg.enable (
+        let
+          goPkgs = selectPkgs goCfg.packageSet;
+        in
+        {
+          home.packages =
+            with goPkgs;
+            [
+              go
+              gopls
+            ]
+            ++ (map (name: goPkgs.${name}) goCfg.additionalPackages);
+        }
+      ))
+      (mkIf pythonCfg.enable {
+        home.packages = with pkgs; [
+          (python3.withPackages (
+            ps:
+            with ps;
+            [
+              uv
+              pip
+              pipx
+              virtualenv
+            ]
+            ++ (map (name: ps.${name}) pythonCfg.additionalPackages)
+          ))
+          pyrefly
+          black
+        ];
+      })
+      (mkIf nixCfg.enable {
+        home.packages = with pkgs; [
+          alejandra
+          nil
+          nixd
+          statix
+          deadnix
+          nix-tree
+        ];
+      })
+    ];
+}

modules/default.nix

@@ -1,6 +1,7 @@
 {...}: {
   imports = [
     ./cli
+    ./coding
     ./base.nix
   ];
 }