Welcome!
If you've been using a version older than 1.2, you'll need to delete your config.txt and recreate your regions with an updated version of the plugin. The radius of the region was not persisting, but that has been corrected. Sorry about that.
SpawnTag allows players to be "tagged" by others. When one player attacks another, they become "tagged," meaning that they will be unable to enter or more move within the spawn for 20 seconds. However, if they are tagged again before their time is up, the time will start over at 20 seconds!
The tag regions must be created via commands, specifying the world in which the region will exist. Soon, the plugin will allow a radius around the spawn to be specified as opposed to the default spawn radius.
Players are notified upon being tagged. They are also informed when they attempt to enter a spawn tag region. Once their timer is up, they receive a message telling them so.
/stspawncreate [world name] [radius] - Creates a region around the spawn of [world name] with a radius of [radius] blocks. By default, the radius will be the radius of the spawn.
/stspawndelete [world name] - Deletes the region around the spawn of [world name], if it exists.
When you run your server for the first time with this plugin, it will create its own data folder. From there, when a region is created, a config.txt file will appear within the plugin's data folder (/myserver/plugins/SpawnTag/config.txt).
Within this config file, the unique ID of the world in which the region exists is saved. Deleting a world will result in that world's ID being removed from the config file.
Once you've got a config file created and some data is stored within it, the plugin will load the saved regions when the server starts.
Some of the currently tested and theoretical issues include:
Because I'm unfamiliar with how this forum sets up repositories, here's a link to the github repository where I've uploaded the code.