diff --git a/bin/auto b/bin/auto
index 0d534d6..f93f3f3 100755
--- a/bin/auto
+++ b/bin/auto
@@ -16,23 +16,27 @@ use IO::Select;
 use Class::Unload;
 use FindBin qw($Bin);
 our $Bin = $Bin;
-BEGIN { unshift(@INC, "$Bin/../src"); }
+BEGIN { 
+    unshift(@INC, "$Bin/../src"); 
+
+    # Set version information.
+    use constant {
+	    NAME   => 'Auto IRC Bot',
+	    VER    => 3,
+	    SVER   => 0,
+	    REV    => 0,
+	    RSTAGE => 'd'
+    };
+}
 use API::Std qw(conf_get err cmd_add cmd_del);
 use API::Log qw(println alog dbug);
 use DB::Flatfile;
 use Parser::Config;
 use Parser::Lang;
 use Parser::IRC;
-#use Sys;
+use Core::IRC;
+
 
-# Set version information.
-use constant {
-	NAME   => 'Auto IRC Bot',
-	VER    => 3,
-	SVER   => 0,
-	REV    => 0,
-	RSTAGE => 'd'
-};
 our $VERSION = 3.0.0;
 $0 = NAME;
 
@@ -284,6 +288,9 @@ else {
 }
 undef $it;
 
+# Create core hooks.
+API::Std::hook_add("on_uprivmsg", "ctcp_version_reply", \&Core::IRC::version_reply);
+
 # Infinite while loop.
 while (1) { 
 	# Timer check.
diff --git a/doc/CHANGELOG b/doc/CHANGELOG
index fd409ba..0cd4b08 100644
--- a/doc/CHANGELOG
+++ b/doc/CHANGELOG
@@ -3,9 +3,11 @@ Auto IRC Bot 3.0: Change Log
 
 3.0 Indev
 ==================================================================
+    * Fixed the NAME,VER,SVER,REV,RSTAGE constants.
+    * Added a CTCP VERSION reply.
+    * Created Core::IRC.
     * Added Bit.ly module
 
-
 3.0 Alpha 1
 ==================================================================
     * Added mod_exists() to API::Std.
diff --git a/src/Core/IRC.pm b/src/Core/IRC.pm
new file mode 100644
index 0000000..258b376
--- /dev/null
+++ b/src/Core/IRC.pm
@@ -0,0 +1,25 @@
+# Auto IRC Bot. An advanced, lightweight and powerful IRC bot.
+# Copyright (C) 2010-2011 Xelhua Development Team (doc/CREDITS)
+# This program is free software; rights to this code are stated in doc/LICENSE.
+
+# Core IRC functionality.
+package Core::IRC;
+use strict;
+use warnings;
+use English;
+use API::IRC qw(notice usrc);
+
+sub version_reply
+{
+    my (($svr, @ex)) = @_;
+    my %src = usrc(substr($ex[0], 1));
+
+    if ($ex[3] eq ":\001VERSION\001") {
+        notice($svr, $src{nick}, "VERSION ".Auto::NAME." ".Auto::VER.".".Auto::SVER.".".Auto::REV.Auto::RSTAGE." ".$OSNAME);
+    }
+
+    return 1;
+}
+
+
+1;