refactor(nixos): inline module enable conditions

configs/nixos/modules/shell/bazel.nix

@@ -6,14 +6,13 @@
 }:
 # Bazel for the primary user's shell environment.
 let
-  cfg = config.modules.shell.bazel; # NOLINT(let_order)
   user = config.user.name;
 in
 {
   options.modules.shell.bazel.enable =
     lib.mkEnableOption "Bazel for the primary user's shell environment";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.shell.bazel.enable {
     home-manager.users.${user}.home.packages = [ pkgs.bazel ];
   };
 }

configs/nixos/modules/shell/direnv/default.nix

@@ -5,14 +5,13 @@
 }:
 # direnv for the primary user, configured through home-manager.
 let
-  cfg = config.modules.shell.direnv; # NOLINT(let_order)
   user = config.user.name;
 in
 {
   options.modules.shell.direnv.enable =
     lib.mkEnableOption "direnv for the primary user, with nix-direnv shell caching";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.shell.direnv.enable {
     home-manager.users.${user}.programs.direnv = {
       enable = true;
       silent = true;

configs/nixos/modules/shell/git.nix

@@ -5,14 +5,13 @@
 }:
 # git for the primary user, configured through home-manager.
 let
-  cfg = config.modules.shell.git; # NOLINT(let_order)
   user = config.user.name;
 in
 {
   options.modules.shell.git.enable =
     lib.mkEnableOption "git for the primary user, carrying the operator's commit identity";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.shell.git.enable {
     home-manager.users.${user}.programs.git = {
       enable = true;
 

configs/nixos/modules/shell/gitea-axi.nix

@@ -6,14 +6,13 @@
 }:
 # gitea-axi for the primary user, installed through its own home-manager module.
 let
-  cfg = config.modules.shell.gitea-axi; # NOLINT(let_order)
   user = config.user.name;
 in
 {
   options.modules.shell.gitea-axi.enable =
     lib.mkEnableOption "gitea-axi, an agent-ergonomic CLI for Gitea issues and pull requests";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.shell.gitea-axi.enable {
     home-manager.sharedModules = [ inputs.gitea-axi.homeModules.default ];
     home-manager.users.${user}.programs.gitea-axi.enable = true;
   };

configs/nixos/modules/shell/herdr.nix

@@ -6,14 +6,13 @@
 }:
 # Herdr, a terminal multiplexer for coding agents.
 let
-  cfg = config.modules.shell.herdr; # NOLINT(let_order)
   user = config.user.name;
 in
 {
   options.modules.shell.herdr.enable =
     lib.mkEnableOption "Herdr, a terminal multiplexer for coding agents";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.shell.herdr.enable {
     registry.shell-shortcut.${config.networking.hostName}.hs = "herdr --session";
 
     home-manager.users.${user} = lib.mkMerge [

configs/nixos/modules/shell/nvim/default.nix

@@ -7,14 +7,13 @@
 }:
 # Neovim for the primary user, configured declaratively through nixvim.
 let
-  cfg = config.modules.shell.nvim; # NOLINT(let_order)
   user = config.user.name;
 in
 {
   options.modules.shell.nvim.enable =
     lib.mkEnableOption "Neovim, configured declaratively via nixvim";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.shell.nvim.enable {
     registry.shell-shortcut.${config.networking.hostName} = {
       vi = "nvim";
       vim = "nvim";

configs/nixos/modules/shell/omp.nix

@@ -6,7 +6,6 @@
 }:
 # Oh My Pi, installed alongside upstream Pi as the `omp` command.
 let
-  cfg = config.modules.shell.omp; # NOLINT(let_order)
   user = config.user.name;
 in
 {
@@ -14,7 +13,7 @@ in
     enable = lib.mkEnableOption "Oh My Pi, a batteries-included fork of Pi";
   };
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.shell.omp.enable {
     home-manager.users.${user}.home.packages = [ pkgs.omp ];
   };
 }

configs/nixos/modules/shell/python.nix

@@ -6,14 +6,13 @@
 }:
 # Python tools for the primary user's shell environment.
 let
-  cfg = config.modules.shell.python; # NOLINT(let_order)
   user = config.user.name;
 in
 {
   options.modules.shell.python.enable =
     lib.mkEnableOption "Python tools for the primary user's shell environment";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.shell.python.enable {
     home-manager.users.${user}.home = {
       sessionVariables.PYTHON_TOOLCHAIN_ROOT = "${pkgs.python3}";
       packages = [ pkgs.python3 ];

configs/nixos/modules/shell/rust.nix

@@ -6,7 +6,6 @@
 }:
 # Rust tools for the primary user's shell environment.
 let
-  cfg = config.modules.shell.rust; # NOLINT(let_order)
   toolchain = pkgs.symlinkJoin {
     name = "rust-toolchain";
     paths = with pkgs; [
@@ -23,7 +22,7 @@ in
   options.modules.shell.rust.enable =
     lib.mkEnableOption "Rust tools for the primary user's shell environment";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.shell.rust.enable {
     home-manager.users.${user} = {
       home.sessionVariables.RUST_TOOLCHAIN_ROOT = "${toolchain}";
 

configs/nixos/modules/shell/tmux/default.nix

@@ -6,13 +6,12 @@
 # tmux for the primary user, configured through home-manager.
 # Settings without a home-manager option are read from ./extra.conf.
 let
-  cfg = config.modules.shell.tmux; # NOLINT(let_order)
   user = config.user.name;
 in
 {
   options.modules.shell.tmux.enable = lib.mkEnableOption "tmux, configured via home-manager";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.shell.tmux.enable {
     registry.shell-shortcut.${config.networking.hostName}.tmx = "tmux new-session -A -s";
 
     home-manager.users.${user}.programs.tmux = {

configs/nixos/modules/shell/yazi.nix

@@ -6,13 +6,12 @@
 }:
 # Yazi, a terminal file manager.
 let
-  cfg = config.modules.shell.yazi; # NOLINT(let_order)
   user = config.user.name;
 in
 {
   options.modules.shell.yazi.enable = lib.mkEnableOption "Yazi, a terminal file manager";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.shell.yazi.enable {
     home-manager.users.${user}.programs.yazi = {
       enable = true;
       enableFishIntegration = true;