adds gitconfig parameters

modules/home/common.nix

···
 {pkgs, ...}: {
-  # Home Manager needs a bit of information about you and the
-  # paths it should manage.
+  # This value determines the Home Manager release that your
+  # configuration is compatible with. This helps avoid breakage
+  # when a new Home Manager release introduces backwards
+  # incompatible changes.
+  #
+  # You can update Home Manager without changing this value. See
+  # the Home Manager release notes for a list of state version
+  # changes in each release.
+  home.stateVersion = "25.11";
+
+  # Let Home Manager install and manage itself.
+  programs.home-manager.enable = true;
+
   home.username = "francisco";
   # home.homeDirectory is usually set automatically by the module depending on OS
 
···
     "$HOME/.local/bin"
   ];
 
-  # This value determines the Home Manager release that your
-  # configuration is compatible with. This helps avoid breakage
-  # when a new Home Manager release introduces backwards
-  # incompatible changes.
-  #
-  # You can update Home Manager without changing this value. See
-  # the Home Manager release notes for a list of state version
-  # changes in each release.
-  home.stateVersion = "25.11";
+  # Global Git Hooks
+  home.file.".githooks/pre-commit" = {
+    executable = true;
+    text = ''
+      #!/bin/sh
+
+      BRANCH="$(git rev-parse --abbrev-ref HEAD)"
+      # change 'origin' if your remote name differs
+      REMOTE="origin"
+
+      # Ensure origin/BRANCH exists
+      if ! git show-ref --verify --quiet "refs/remotes/$REMOTE/$BRANCH"; then
+        # remote branch doesn't exist — allow commit
+        exit 0
+      fi
+
+      # If origin/BRANCH is ancestor of local branch, local has or includes remote commits => allow
+      if git merge-base --is-ancestor "$REMOTE/$BRANCH" "$BRANCH"; then
+        exit 0
+      fi
 
-  # Let Home Manager install and manage itself.
-  programs.home-manager.enable = true;
+      echo "Commit blocked: your branch is missing commits from $REMOTE/$BRANCH."
+      echo "Run: git fetch $REMOTE && git rebase $REMOTE/$BRANCH (or git merge) then commit again."
+      exit 1
+    '';
+  };
 
   # Shared Packages
   home.packages = with pkgs; [
···
   # Git Configuration
   programs.git = {
     enable = true;
-    settings = {
-      user.name = "Francisco Abarzua";
-      user.email = "[e-mail]";
-      init.defaultBranch = "main";
-      pull.rebase = true;
+    userName = "Francisco Abarzua";
+    userEmail = "[e-mail]";
+    ignores = [
+      ".DS_Store"
+      ".vscode/"
+      "shell.nix"
+      "Thumbs.db"
+    ];
+    aliases = {
+      undo = "reset --soft HEAD~1";
+    };
+    extraConfig = {
+      core = {
+        editor = "nano";
+        hooksPath = "~/.githooks";
+      };
+      customBranch = {
+        displayStatus = true;
+      };
+      init = {
+        defaultBranch = "main";
+      };
+      merge = {
+        conflictstyle = "zdiff3";
+      };
+      pull = {
+        rebase = true;
+      };
     };
   };
 
···
     enableGitIntegration = true;
     options = {
       navigate = true;
+      line-numbers = true;
       light = false;
     };
   };