Add the “Regular” site profile to the core as another installation profile option

site-regular/ready.php

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+<?php namespace ProcessWire;
+
+/**
+ * ProcessWire Bootstrap API Ready 
+ * ===============================
+ * This ready.php file is called during ProcessWire bootstrap initialization process.
+ * This occurs after the current page has been determined and the API is fully ready 
+ * to use, but before the current page has started rendering. This file receives a 
+ * copy of all ProcessWire API variables. This file is an idea place for adding your
+ * own hook methods. 
+ *
+ */
+
+/** @var ProcessWire $wire */
+
+/**
+ * Example of a custom hook method
+ * 
+ * This hook adds a “numPosts” method to pages using template “category”.
+ * The return value is the quantity of posts in category.
+ *
+ * Usage:
+ * ~~~~~
+ * $numPosts = $page->numPosts(); // returns integer
+ * numPosts = $page->numPosts(true); // returns string like "5 posts"
+ * ~~~~~
+ *
+ */
+$wire->addHook('Page(template=category)::numPosts', function($event) {
+	/** @var Page $page */
+	$page = $event->object;
+
+	// only category pages have numPosts
+	if($page->template != 'category') return;
+
+	// find number of posts
+	$numPosts = $event->pages->count("template=blog-post, categories=$page");
+
+	if($event->arguments(0) === true) {
+		// if true argument was specified, format it as a "5 posts" type string
+		$numPosts = sprintf(_n('%d post', '%d posts', $numPosts), $numPosts);
+	}
+
+	$event->return = $numPosts;
+});