The WordPress plugin repository takes the “Requires” and “Tested up to” versions from the wordpress/wp-content/plugins/akismet/readme.txt file.
=== Akismet === Contributors: matt, ryan, andy, mdawaffe, tellyworth, josephscott, lessbloat, eoigal, cfinke, automattic, jgs Tags: akismet, comments, spam Requires at least: 3.2 Tested up to: 4.1.1 Stable tag: 3.1.1 License: GPLv2 or later Akismet checks your comments against the Akismet Web service to see if they look like spam or not. == Description == Akismet checks your comments against the Akismet Web service to see if they look like spam or not and lets you review the spam it catches under your blog's "Comments" admin screen.
Stable tag should indicate the Subversion “tag” of the latest stable version, or “trunk,” if you use `/trunk/` for stable.
Top of the Akismet plugin PHP file:
<?php /** * @package Akismet */ /* Plugin Name: Akismet Plugin URI: http://akismet.com/ Description: Used by millions, Akismet is quite possibly the best way in the world to <strong>protect your blog from comment and trackback spam</strong>. It keeps your site protected from spam even while you sleep. To get started: 1) Click the "Activate" link to the left of this description, 2) <a href="http://akismet.com/get/">Sign up for an Akismet API key</a>, and 3) Go to your Akismet configuration page, and save your API key. Version: 3.1.1 Author: Automattic Author URI: http://automattic.com/wordpress-plugins/ License: GPLv2 or later Text Domain: akismet */
* General Public License, version 2